CN117258676B - Integrated biomass pulping machine integrating series pulping processes - Google Patents
Integrated biomass pulping machine integrating series pulping processesInfo
- Publication number
- CN117258676B CN117258676B CN202311448000.3A CN202311448000A CN117258676B CN 117258676 B CN117258676 B CN 117258676B CN 202311448000 A CN202311448000 A CN 202311448000A CN 117258676 B CN117258676 B CN 117258676B
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- bin
- valve
- pulping
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/75—Discharge mechanisms
- B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
- B01F35/7547—Discharge mechanisms characterised by the means for discharging the components from the mixer using valves, gates, orifices or openings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/53—Mixing liquids with solids using driven stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/58—Mixing liquids with solids characterised by the nature of the liquid
- B01F23/581—Mixing liquids with solids, slurries or sludge, for obtaining a diluted slurry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/80—After-treatment of the mixture
- B01F23/808—Filtering the mixture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Paper (AREA)
Abstract
本专利申请提供了一种集成系列制浆工艺的一体生物质制浆机，主体为水平回转运行的圆筒卧式封闭仓，本封闭仓的两端向中心收拢，一端收拢为进料接口、另一端收拢为出料接口，所述的进料接口处组装有旋阀；所述的旋阀由密封转动配合的阀体和阀芯构成，两者之中设有与封闭仓相通的浆料输送中央内腔；所述的阀芯，其阀壁内设有引出口与所述封闭仓内沿仓内壁设置的输料管相通的潜通道，潜通道的阀体内端与阀体内壁上的的第一环槽对应相通；所述的封闭仓，其仓内壁上固定附着有从进料仓口旋向出料仓口的螺旋带。本制浆机可完成洗料、生物酶反应、熟化、蒸煮、漂白、筛选等制浆工艺，具有药液耗量少、低耗能的技术优点。
This patent application provides an integrated biomass pulping machine that integrates a series of pulping processes. The main body is a horizontally rotating cylindrical enclosed chamber. Both ends of the enclosed chamber converge towards the center, with one end serving as the feed inlet and the other as the discharge inlet. A rotary valve is assembled at the feed inlet. The rotary valve consists of a valve body and a valve core that rotate in a sealed manner, with a central inner cavity for pulp delivery communicating with the enclosed chamber. The valve core has a recessed channel within its valve wall that connects to a conveying pipe arranged along the inner wall of the enclosed chamber. The inner end of the recessed channel communicates with a first annular groove on the inner wall of the valve body. A spiral band is fixedly attached to the inner wall of the enclosed chamber, spiraling from the feed inlet to the discharge outlet. This pulping machine can complete pulping processes such as washing, bio-enzyme reaction, maturation, cooking, bleaching, and screening, and has the technical advantages of low chemical consumption and low energy consumption.
Description
Technical Field
The patent application relates to the technical field of pulping of biomass fiber pulp, in particular to an integrated pulping device for integrally completing a series of procedures.
Background
The pulping process of biomass fiber raw materials sequentially comprises a material preparation process, material washing, cooking, bleaching, screening and the like, the cooking step is completed by equipment such as a rotary spherical digester, a spiral continuous digester or a vertical digester, the bleaching step is generally completed by a pulping bleaching machine, and each pulping process needs corresponding equipment to form a pulping production line, so that the production of pulp finished products is realized. Therefore, the single functions of the working procedures and equipment lead to the complicated and miscellaneous components of the pulping production line, long process flow, high energy consumption, large labor consumption, high labor intensity, time and labor consumption for working, and the technical problems of poor production conditions, low pulping efficiency, difficult quality assurance of pulp products and low production economic benefit are caused.
Therefore, technical developers develop and innovate in many aspects, put forward to integrate the stewing and bleaching into pulping all-in-one machine equipment, as disclosed in patent document CN102212978A, a 'high-concentration stewing and bleaching pulping all-in-one machine' is characterized in that the main body of the high-concentration stewing and bleaching pulping all-in-one machine is a horizontally arranged rotatable long cylindrical closed tank, the middle part of the tank is inserted into a feeding pipe, then the three-way in the tank is used for feeding, the opposite side of the feeding pipe is provided with a liquid outlet and a filter plate for covering the liquid outlet, one end of the tank is provided with a multi-way rotary valve which is a heat source, a cold source and a liquid medicine or steam delivery control valve, wherein the liquid medicine or steam delivery is directly communicated with a liquid medicine pipeline penetrating through the central line of the tank, the liquid medicine pipeline is supported by a radial supporting rod in the tank, and a stirring upright piece facing the center is arranged on the wall of the tank, so that the materials in the tank can be pre-soaked, steamed or bleached in a time.
The existing horizontal pulping integrated machine has more use problems in actual operation, namely a multi-path rotary valve is assembled to occupy one port of a tank body, although a connecting structure for conveying a heat source, a cold source, liquid medicine and the like into the tank is convenient, a feed port is formed in the middle of the wall of the tank body, slurry is mainly accumulated in the middle of the tank body, uniform distribution is difficult to form in the whole tank body, the uniformity of material impregnation, stewing or bleaching is affected, the technical problems of slurry generation, semi-raw semi-cooked slurry and semi-black semi-white slurry are easy to occur, stirring sheets close to two sides are difficult to exert the effect of forcibly mixing the materials, a liquid medicine pipeline penetrates through the center line of the tank body, the connecting structure of the multi-path rotary valve is simplified, the arrangement structure and a supporting member of the multi-path rotary valve are continuously impacted by the materials in operation, the mixing of the materials with the liquid medicine, the steam and the like can be affected, the frame structure in the tank causes high failure rate, and the operation stability and reliability of the device are affected.
Disclosure of Invention
The invention aims to solve the technical problems of poor equipment stability and reliability and poor quality of the manufactured pulp caused by the technical defects of the existing integrated pulping machine, and provides an integrated biomass pulping machine integrating series pulping processes.
The technical scheme of the integrated biomass pulping machine of the integrated series pulping process is that the integrated biomass pulping machine of the integrated series pulping process is mainly characterized in that a main body is a cylindrical horizontal closed bin which horizontally rotates to run, two ends of the closed bin are folded towards the center, one end of the closed bin is folded to be a feeding interface, the other end of the closed bin is folded to be a discharging interface, a liquid discharging interface is arranged in the middle of the closed bin, and a sieve plate for covering the liquid discharging interface is arranged in the bin;
a rotary valve is assembled at the feeding interface;
the rotary valve comprises a valve body and a valve core which are in sealing and rotating fit, wherein the valve body and the valve core are provided with a slurry conveying central inner cavity communicated with a feed port of the closed bin, the valve body is provided with an outer end port communicated with an outer feed pipeline, and the valve core is provided with an outer end port communicated with the feed port of the closed bin;
The valve core is internally provided with a submerged channel, an outlet of the submerged channel is communicated with a conveying pipe port arranged along the inner wall of the closed bin, the inner end of a valve body of the submerged channel is correspondingly communicated with a first annular groove on the inner wall of the valve body, and a first external connecting pipe connector with the inner end communicated with the first annular groove is arranged on the valve body;
the inner wall of the closed bin is fixedly attached with a spiral belt which rotates from the feeding bin opening to the discharging bin opening, and the belt opening extends into the bin.
According to one preferred option of the whole technical scheme, the inner wall of the closed bin is fixedly attached with two or more spiral belts which are screwed from the feeding bin opening to the discharging bin opening at equal intervals.
In one preferable option of the above overall technical solution, the openings of the spiral belt are saw-tooth.
One preferable option of the whole technical scheme is that the bin body close to the discharge bin port is a spiral belt with a non-sawtooth belt port from the discharge port.
One preferable option of the whole technical scheme is that the closed bin is provided with an interlayer;
The valve core is characterized in that a first submerged channel and a second submerged channel which are axially parallel are further arranged in the valve wall of the valve core, the first submerged channel and the second submerged channel are respectively used as a heat source conveying channel and a heat source returning channel, one end of a closed bin of the valve core is respectively communicated with the interlayer pipeline, the outer end of the closed bin is respectively correspondingly communicated with a second annular groove and a third annular groove on the inner wall of the valve body, and the second annular groove and the third annular groove are respectively communicated with a heat source conveying pipe joint and a heat source returning pipe joint. The heat source can also be a cold source.
In one preferred option of the above overall technical scheme, the interlayer is provided with uniformly distributed reinforcing belts.
In one preferable option of the whole technical scheme, the sieve plate B covers the range of the included angle of the circle center of the lower semicircle of the inner wall of the bin, which is 30-60 degrees.
According to one preferred option of the whole technical scheme, more than two integrated biomass pulping machines of the integrated series pulping process are connected in series according to the inlet and outlet sequence, the discharge port of the front-stage pulping machine is connected with the material passing chute through a heat-resistant and pressure-resistant fixed rotary bearing, and then the discharge port of the front-stage pulping machine is connected with the outer feed pipeline of the rear-stage pulping machine in series.
Drawings
Fig. 1 is a general sectional view of the present patent application.
Fig. 2 is a left side view of fig. 2.
Fig. 3 is a sectional view of the E-E structure of fig. 1.
Fig. 4 is a sectional view of the structure of the faucet.
Fig. 5 is a sectional view of the structure of B-B of fig. 4.
Fig. 6 is a diagram of a plurality of series structures of the present patent application.
Fig. 7 is a sectional view of the fixed rotation bearing.
Detailed Description
The technical content of the integrated biomass pulping machine of the integrated series pulping process of the patent application will be described in detail below, and the application technical effects thereof will be described.
The integrated biomass pulping machine is an integrated device capable of carrying out pulping processes such as material washing, dipping, steaming, material washing, bleaching, material re-washing and the like in a time-sharing manner, the main body of the integrated biomass pulping machine is a cylindrical horizontal closed bin 1 which horizontally rotates and runs, the integrated biomass pulping machine is horizontally rotatably supported on two outer rolling bearings 150, limit rollers 151 are arranged on two sides of a bearing ring 50, and an external gear 40 on the closed bin 1 is driven by a reducing motor to run in a forward direction or a reverse direction alternately through a pinion, so that stable and reliable running is ensured. The two ends of the closed bin 1 are folded towards the center cone shape, one end is folded into a feeding interface 11, the other end is folded into a discharging interface 22, the middle part of the closed bin 1 is provided with a liquid discharging interface 80, a sieve plate B which covers the liquid discharging interface 80 is arranged in the bin, and the sieve plate B covers the circle center included angle range of 30-60 degrees of the lower semicircle of the inner wall of the bin.
In this embodiment, a spiral belt 13 is fixedly attached to the inner wall of the closed bin 1, the belt opening of the spiral belt 13 extends into the bin from the feeding bin opening M to the discharging bin opening N and is provided with a saw tooth shape, the height of the belt opening is 200-500mm, and the spiral belt 13 with a non-saw tooth belt opening is arranged from the bin body close to the discharging bin opening N to the discharging port 22.
In this embodiment, two or more spiral belts 13 are fixedly attached to the inner wall of the closed bin 1 at equal intervals, and the belt openings extend into the bin from the feeding bin opening M to the discharging bin opening N.
The closed bin 1 is fixedly attached with a conveying pipe 15 along the inner wall of the bin and penetrates through the bin body to the feeding interface 11, and the conveying pipe 15 is uniformly provided with small conveying holes.
The feeding interface 11 is provided with a rotary valve for controlling the transportation of heat source, steam, liquid medicine, cleaning water, oxygen and the like required by the closed bin 1. The valve comprises a valve body 121 and a valve core 122 which are in sealing and rotating fit, as shown in fig. 4 and 5, the valve body 121 is provided with an outer end port 124 which is communicated with an outer feed pipeline, and the valve core 122 is provided with an outer end port 128 which is communicated with the feed port 11 of the closed bin 1, wherein the two parts are provided with slurry conveying central inner cavities which are communicated with the feed port 11 of the closed bin 1.
The valve core 122 is provided with a submerged channel 125 in the valve wall, the outlet of the submerged channel 125 is correspondingly communicated with the port of the material conveying pipe 15 in the closed bin 1, one end of the valve body 121 of the submerged channel 125 is correspondingly communicated with the first annular groove 145 on the inner wall of the valve body 121, and the valve body 121 is provided with a first external connection pipe interface 27 which is communicated with the first annular groove 145 at the inner end and is used for controlling the conveying of various liquid medicines, oxygen, cleaning water and the like to the closed bin 1.
The closed bin 1 mainly used for curing and washing materials can be a single-wall bin.
The closed bin 1 is provided with an interlayer A. The interlayer A is used for introducing a heat source or a cold source, such as steam or heat conducting oil, and providing temperature process conditions required by dipping, stewing or bleaching, cooling and discharging and the like. The heat source described below also includes a cold source.
Reinforcing belts 10 are uniformly distributed in the interlayer A to improve the mechanical strength of the interlayer A.
The valve core 122 is also provided with a first submerged groove 123 and a second submerged groove 129 which are axially parallel in the valve wall, the first submerged groove 123 and the second submerged groove 129 are respectively used as a heat source conveying channel and a heat source returning channel between the valve body 121 and the closed cabin 1, one end of the closed cabin 1 is respectively communicated with the interlayer A through pipe joints 126 and 127 and intermediate connecting pipes 30 and 29, one end in the valve body 121 is respectively correspondingly communicated with a second annular groove 146 and a third annular groove 147 on the inner wall of the valve body, and the second annular groove 146 and the third annular groove 147 are respectively connected with a heat source external pipeline through a heat source conveying pipe joint 31 and a heat source returning pipe joint 18. Wherein, the heat source can also be a cold source.
The material after material preparation enters the closed bin 1 in operation through the rotary valve, the material is fully mixed and uniformly distributed in the closed bin 1 under the action of the spiral belt 13 and the sawtooth belt opening thereof, and simultaneously the material is torn and conveyed, the liquid medicine, oxygen, washing water and a heat source or a cold source enter the closed bin 1 through the control of the rotary valve and enter the closed bin 1 for full mixing or contact heat exchange with the material, the pulping processes such as material washing, biological enzyme reaction, curing, stewing, bleaching and screening are completed, the finished pulp is discharged under normal pressure, the interlayer can enable the temperature in the bin to quickly and accurately follow the process temperature control, the spiral belt 13 can well complete high-efficiency mixing with the liquid medicine even for semi-dry high-concentration pulp, and thus the physical index of the finished pulp is easy to achieve, and the technical advantages of low liquid medicine consumption and low energy consumption are achieved.
The integrated biomass pulping machines of more than 2 integrated series pulping processes are connected in series according to the inlet and outlet sequence, the discharge port of the front-stage pulping machine is connected with a material passing chute 26 through a heat-resistant pressure-resistant fixed rotation bearing 23, and the material passing chute is used for carrying out pulping production of semi-dry ultrahigh thick pulp in an outer feed pipeline of the rear-stage pulping machine connected in series.
As shown in fig. 7, the structure of an embodiment of the fixed rotation bearing 23 is composed of an inner tube 231 and an outer sleeve 232 which are in sealed rotation fit, the inner tube 231 is connected with the discharge port 22 of the front-stage pulping machine, and the outer sleeve 232 is fixedly connected with the material passing chute 26.
The serial number of sections can be set according to the variety of the slurry, the production process, the pulping standard and the production capacity, equipment such as pulping is additionally arranged after each section of discharging, the functional treatments such as pulping, defibrination, tearing and the like are implemented, and then the serial lower section pulping is conveyed. The biomass material is fed into the first section of pulping machine, and is torn, stirred and propelled by the spiral belt of the sawtooth belt mouth in operation, and simultaneously is injected with biological enzyme compound medicament to impregnate and carry out biological enzyme reaction through a rotary valve, and is fed into a heat source, and is subjected to cellulose enzyme, hemicellulase and lignin enzyme compound enzymolysis reaction under the conditions of accurate control and proper water content, catalyzed, mixed and stirred, softened pulp is fed into the 2 nd section of pulping machine, the softening medicament is injected into the 2 nd section of rotary valve, the heat source is provided by the interlayer, the reaction is continued under the tearing and stirring action of the sawtooth spiral belt, the cellulose, hemicelluloses and lignin of the straw are promoted to decompose, the pulp is discharged after curing is finished, and is divided into two paths, one path is used for producing unbleached pulp, pulping and pulping equipment is added, and finally obtaining finished unbleached pulp, and the other path is used for producing bleached pulp, and is fed into the extruding and impregnating machine through the conveying equipment, and is fed into the bleaching auxiliary agent to the 3 rd section of pulping machine, and is fed into the interlayer through the 3 rd section of rotary valve, and is continuously heated, the heat source is guaranteed, the pulp is promoted under the tearing and stirring action of the sawtooth spiral belt, the ultrahigh concentration and the bleaching concentration is guaranteed, and the bleaching effect is completely discharged from the end of the sawtooth spiral belt, and is completely heated.
Claims (4)
1. The integrated biomass pulping machine integrating a series of pulping processes is characterized in that a main body is a cylindrical horizontal closed bin (1) which horizontally rotates and runs, the closed bin (1) is provided with an interlayer (A), two ends of the closed bin (1) are folded towards the center, one folding end is provided with a rotary valve, the other folding end is provided with a discharge port (22), the middle part of the closed bin (1) is provided with a liquid discharge port (80), and a sieve plate (B) covering the liquid discharge port is arranged in the bin;
The rotary valve comprises a valve body (121) and a valve core (122) which are in sealing and rotating fit;
it is characterized in that the method comprises the steps of,
The valve body (121) and the valve core (122) are provided with a slurry conveying central inner cavity communicated with the feed port (11) of the closed bin, the valve body (121) is provided with an outer end port (124) communicated with an outer feed pipeline, and the valve core (122) is provided with an inner end port (128) communicated with the feed port (11) of the closed bin;
The valve core (122) is internally provided with a submerged channel (125), an outlet of the submerged channel (125) is communicated with a port of a conveying pipe (15) arranged along the inner wall of the closed bin (1), the submerged channel (125) is correspondingly communicated with a first annular groove (145) on the inner wall of the valve body (121) at the inner end of the valve body, and a first external connection pipe interface (27) with the inner end communicated with the first annular groove (145) is arranged on the valve body (121);
The valve comprises a valve core (122), wherein a first submerged groove (123) and a second submerged groove (129) which are axially parallel are further arranged in the valve wall of the valve, the first submerged groove (123) and the second submerged groove (129) are respectively used as a heat source conveying channel and a heat source returning channel, one end, close to a closed bin (1), of the valve core is respectively communicated with the interlayer (A) through pipe joints (126 and 127) and intermediate connecting pipes (30 and 29), the other end of the first submerged groove (123) and the other end of the second submerged groove (129) are respectively correspondingly communicated with a second annular groove (146) and a third annular groove (147) of the inner wall of the valve body, and the second annular groove (146) and the third annular groove (147) are respectively communicated with a heat source conveying pipe joint (31) and a heat source returning pipe joint (28);
the inner wall of the closed bin (1) is fixedly attached with a spiral belt (13) which rotates from a feeding bin opening (M) to a discharging bin opening (N), and the belt opening extends into the bin;
The height of the belt opening of the spiral belt (13) is 200-500mm, and the belt opening is in a zigzag shape;
A helical belt (13) with a non-sawtooth belt opening is arranged from a bin body close to the discharge bin opening (N) to the discharge port (22);
The discharging interface (22) is provided with a heat-resistant and pressure-resistant fixed rotary bearing (23);
The fixed rotary bearing (23) consists of an inner pipe (231) and an outer sleeve (232) which are in sealing rotary fit, the inner pipe (231) is connected with the discharging interface (22), and the outer sleeve (232) is fixedly connected with the material passing chute (26).
2. The integrated biomass pulping machine of the integrated series pulping process according to claim 1, wherein the inner wall of the closed bin (1) is fixedly attached with two or more spiral belts (13) which rotate from the feeding bin opening to the discharging bin opening at equal intervals.
3. The integrated biomass pulping machine of the integrated series pulping process according to claim 1, wherein the interlayer (a) is provided with uniformly distributed reinforcing belts (10).
4. The integrated biomass pulping machine of integrated series pulping process according to claim 1, wherein the screen plate (B) covers the center included angle range of 30-60 ° of the lower semicircle of the inner wall of the bin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311448000.3A CN117258676B (en) | 2023-11-02 | 2023-11-02 | Integrated biomass pulping machine integrating series pulping processes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311448000.3A CN117258676B (en) | 2023-11-02 | 2023-11-02 | Integrated biomass pulping machine integrating series pulping processes |
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| Publication Number | Publication Date |
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| CN117258676A CN117258676A (en) | 2023-12-22 |
| CN117258676B true CN117258676B (en) | 2025-12-19 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212978A (en) * | 2011-04-30 | 2011-10-12 | 李刚荣 | High-concentration digesting, bleaching and pulping integrated machine |
| CN209619743U (en) * | 2019-02-19 | 2019-11-12 | 郓城海沁纤维有限公司 | A kind of pre- dipping machine of slurrying double helix |
| CN218637171U (en) * | 2022-09-30 | 2023-03-17 | 沁阳市中澳生物科技有限公司 | Novel cylinder pulping boiler |
| CN221753189U (en) * | 2023-11-02 | 2024-09-24 | 丹东东方轻工机械有限公司 | Integrated biomass pulping machine with a series of pulping processes |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1394779A (en) * | 1964-01-03 | 1965-04-09 | France Ministre Des Armees | Continuous cellulose nitration process |
| CN202081340U (en) * | 2011-04-30 | 2011-12-21 | 李刚荣 | High yield environment-friendly papermaking pulping system |
-
2023
- 2023-11-02 CN CN202311448000.3A patent/CN117258676B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212978A (en) * | 2011-04-30 | 2011-10-12 | 李刚荣 | High-concentration digesting, bleaching and pulping integrated machine |
| CN209619743U (en) * | 2019-02-19 | 2019-11-12 | 郓城海沁纤维有限公司 | A kind of pre- dipping machine of slurrying double helix |
| CN218637171U (en) * | 2022-09-30 | 2023-03-17 | 沁阳市中澳生物科技有限公司 | Novel cylinder pulping boiler |
| CN221753189U (en) * | 2023-11-02 | 2024-09-24 | 丹东东方轻工机械有限公司 | Integrated biomass pulping machine with a series of pulping processes |
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| CN117258676A (en) | 2023-12-22 |
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