CN112781237B - Waste heat recycling device of power plant boiler - Google Patents

Abstract

The invention discloses a waste heat recycling device for a boiler of a power plant, which comprises a ferrule, the ferrule is semi-circular, the bottom of the ferrule is provided with a notch, the ferrule is hollow, and the inner portion of the ferrule is in a hollow shape. The cavity is divided into two left and right cavities by a partition, wherein the left cavity is a gas heating cavity, and the right cavity is a liquid heating cavity; the gas heating cavity is evenly provided with a plurality of heat conducting sheets along the vertical direction, The two ends of the heat-conducting sheet extend toward the front and rear ends of the ferrule, respectively, and a plurality of heat-conducting sheets for heating the gas and a heat-dissipating plate for heating the liquid are respectively arranged in the gas heating chamber and the liquid heating chamber. During use, the ferrule can be directly clamped to the outer wall of the boiler, and the air and liquid introduced into the gas heating chamber and the liquid heating chamber can be heated by the waste heat of the outer wall of the boiler, and the waste heat can be converted into two utilization methods by using the same device. Waste is reduced and ease of use is improved.

Description

Waste heat recycling device for boilers in power plants

technical field

The invention relates to the field of boilers, in particular to a waste heat recycling device for a boiler in a power plant.

Background technique

Power plant boilers, also known as "power plant boilers", refer to medium and large boilers in power plants that provide a specified quantity and quality of steam to steam turbines. One of the main thermal equipment in thermal power plants. It is often matched with a steam turbine generator set of a certain capacity and is mainly used for power generation, but it can also be used for external heating in some special occasions. Generally, the evaporation capacity is large, and the steam parameters (steam temperature and steam pressure) are very high. A complete set of auxiliary equipment is required. Most of them need to be equipped with a chamber combustion furnace. The forced ventilation method is adopted, and a variety of fuels (pulverized coal, crude oil or heavy oil, Blast furnace gas or coke oven gas), the structure is more complex and the efficiency is high, most of which can reach about 85 to 93%, and there are quite high requirements for the level of operation management, degree of mechanization and automatic control technology.

The heat generated by the outer wall of the current power plant boiler is directly dissipated in the external environment during use, so in the long-term operation process, it will cause a certain amount of waste, so it is necessary to use the waste heat generated.

Therefore, how to solve the above-mentioned deficiencies in the prior art is the subject of the present invention.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention discloses a waste heat recycling device for a boiler of a power plant.

In order to achieve the above purpose, the present invention provides the following technical scheme: a waste heat recycling device for a boiler of a power plant, comprising a ferrule, the ferrule is semicircular, and the ferrule is used to be clamped on the outer wall of the boiler, and the ferrule is The bottom of the ferrule is provided with a gap, the ferrule is hollow, and the inner cavity of the ferrule is divided into left and right cavities by a partition, wherein the left cavity is a gas heating cavity, and the right cavity is a liquid heating chamber;

A plurality of heat-conducting sheets are evenly arranged in the vertical direction in the gas heating chamber, two ends of the heat-conducting sheets are respectively extended towards the front and rear ends of the ferrule, and a front end of the ferrule is connected to a corresponding gas heating chamber. an exhaust pipe, the exhaust pipe is communicated with the gas heating chamber, the rear end of the gas heating chamber is an opening, the opening is in the shape of a curved arc, and the ferrule is installed corresponding to the opening There are a plurality of fans, the plurality of fans are arranged in an arc shape consistent with the opening, and the air outlet end of the fans is arranged toward the gas heating chamber;

A plurality of uniform heat plates are arranged in the liquid heating chamber along the front and rear directions, and the plurality of the uniform heat plates are extended along the bending direction of the liquid heating chamber; a water storage tank is formed between two adjacent uniform heat plates, and the The top of the ferrule is connected with a water uniform pipe corresponding to the liquid heating chamber, the inner cavity of the water uniform pipe is communicated with the liquid heating chamber, and the bottom of the water uniform pipe is respectively provided with corresponding water storage tanks. For the water outlet, a drain valve is connected to the bottom of the ferrule corresponding to the liquid heating chamber.

Further, a gap is left between the bottom of the uniform heat plate and the bottom wall of the inner cavity of the liquid heating chamber, and the drain valve is communicated with the gap.

Further, the inner wall of the liquid heating chamber is coated with a layer of non-stick coating, and the non-stick coating is a polytetrafluoroethylene coating.

Further, a graphene thermal conductive film is attached to the bottom surface of the ferrule.

Further, the outer wall of the ferrule is also covered with a layer of heat insulating cloth, and the heat insulating cloth is an aluminum silicate fiber cloth.

Further, the exhaust pipe and the drain valve are both connected with a waste heat conveying pipe, the waste heat conveying pipe includes an inner pipe and an outer pipe sleeved together, the inner pipe is inserted into the inner cavity of the outer pipe, and the drain valve is connected to the outer pipe. The inner pipe communicates with each other, and the exhaust pipe communicates with the outer pipe.

Compared with the prior art, the present invention has the following advantages: the waste heat recycling device of the present invention includes a ferrule, and the ferrule is divided into a gas heating chamber and a liquid heating chamber, and a plurality of The heat-conducting sheet for heating the gas and the uniform heating plate for heating the liquid can directly clip the ferrule into the outer wall of the boiler during use, and use the waste heat of the outer wall of the boiler to heat the air and liquid into the gas heating chamber and the liquid heating chamber. Heating, by using the same device to convert waste heat into two ways of utilization, reduces waste and improves the convenience of its use.

Description of drawings

Fig. 1 is the perspective view of the present invention;

Fig. 2 is the rear view of Fig. 1;

Fig. 3 is the internal schematic diagram of the liquid heating chamber;

FIG. 4 is a front cross-sectional view of FIG. 1 .

List of reference signs: 100 ferrules, 101 gas heating chamber, 102 liquid heating chamber, 103 graphene thermal conductive film, 111 thermal conductive sheet, 112 exhaust pipe, 113 fan, 121 uniform heating plate, 122 water storage tank, 123 water uniform pipe, 124 drain valve.

Detailed ways

The present invention will be further clarified below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" ” refer to directions towards or away from the geometric center of a particular part, respectively.

Example: Referring to Figures 1-4, a waste heat recycling device for a boiler of a power plant includes a ferrule 100, the ferrule 100 is semicircular, a gap is formed at the bottom of the ferrule 100, and the ferrule 100 is hollow, The inner cavity of the ferrule 100 is divided into two left and right cavities by a partition, wherein the left cavity is a gas heating cavity 101, and the right cavity is a liquid heating cavity 102; the ferrule 100 is used to be clamped in the boiler On the outer wall; the ferrule 100 is made of copper as a whole;

A plurality of heat-conducting sheets 111 are evenly arranged in the gas heating chamber 101 along the vertical direction. Both ends of the heat-conducting sheets 111 are respectively extended towards the front and rear ends of the ferrule 100 . The front end of the ferrule 100 is connected to an exhaust gas corresponding to the gas heating chamber 101 . The pipe 112 and the exhaust pipe 112 are communicated with the gas heating chamber 101. The rear end of the gas heating chamber 101 is open, and the opening is in the shape of a curved arc. A plurality of fans 113 are installed on the ferrule 100 corresponding to the opening. The fans 113 are arranged in an arc shape consistent with the opening, and the air outlet end of the fans 113 is arranged toward the gas heating chamber 101;

The above-mentioned heat-conducting sheet 111 is made of copper sheet, and the waste heat of the boiler is transferred to the heat-conducting sheet 111 in the working state. The fan 113 blows the outside air into the gas heating chamber 101 and is heated by a plurality of relatively long heat-conducting sheets 111, and then is heated by the exhaust pipe. 112 is blown out, and the generated hot air can be passed into the workshop that needs to be heated to improve its utilization rate;

The liquid heating chamber 102 is arranged with a plurality of uniform heating plates 121 along the front and rear directions, and the plurality of uniform heating plates 121 are extended along the bending direction of the liquid heating chamber 102; a water storage tank 122 is formed between two adjacent uniform heating plates 121, The top of the ferrule 100 is connected with a water distribution pipe 123 corresponding to the liquid heating chamber 102, the inner cavity of the water distribution pipe 123 is communicated with the liquid heating chamber 102, and the bottom of the water distribution pipe 123 corresponds to each water storage tank 122. A drain valve 124 is connected to the bottom of the ferrule 100 corresponding to the liquid heating chamber 102;

The uniform heating plate 121 can also be made of copper sheets. In the working state, the waste heat of the boiler is transferred to the uniform heating plate 121, and the external cold water is introduced to the uniform heating plate 121 through the uniform water pipe 123. After being heated by the uniform heating plate, the drain valve 124 discharge;

In order to allow the heated water to be collected at the bottom of the liquid heating chamber 102 and discharged uniformly, a gap is left between the bottom of the even heat plate 121 and the bottom wall of the inner cavity of the liquid heating chamber 102, and the drain valve 124 communicates with the gap.

In order to reduce the adhesion of impurities in the water on the inner wall of the liquid heating chamber 102, the inner wall of the liquid heating chamber 102 is coated with a layer of non-stick coating, and the non-stick coating is a polytetrafluoroethylene coating.

In order to improve the thermal conductivity of the ferrule 100 , a graphene thermal conductive film 103 is attached to the inner side of the ferrule 100 .

In order to reduce the heat dissipation of the outer wall of the ferrule 100 , the outer wall of the ferrule 100 is also covered with a layer of heat insulating cloth, and the heat insulating cloth is aluminum silicate fiber cloth.

The exhaust pipe 112 and the drain valve 124 are both connected with a waste heat conveying pipe, the waste heat conveying pipe includes an inner pipe and an outer pipe sleeved together, the inner pipe is inserted into the inner cavity of the outer pipe, the drain valve 124 is communicated with the inner pipe, and the drain valve 124 is communicated with the inner pipe and discharged. The air pipe 112 is communicated with the outer pipe, and the waste heat conveying pipe adopts a double-pipe design. The inner pipe transmits hot water, and the outer pipe transmits hot air. During the water transmission process in the inner pipe, heat loss can be reduced and a relatively high temperature can be maintained.

The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims (6)

1. The utility model provides a waste heat recycling device of power plant boiler which characterized in that: the boiler heating device comprises a cutting sleeve (100), wherein the cutting sleeve (100) is semicircular, the cutting sleeve (100) is used for being clamped on the outer wall of a boiler, a notch is formed in the bottom of the cutting sleeve (100), the cutting sleeve (100) is hollow, the inner cavity of the cutting sleeve (100) is divided into a left cavity and a right cavity by a partition plate, the left cavity is a gas heating cavity (101), and the right cavity is a liquid heating cavity (102);

the gas heating cavity is characterized in that a plurality of heat-conducting fins (111) are uniformly arranged in the gas heating cavity (101) along the vertical direction, two ends of each heat-conducting fin (111) extend towards the front end and the rear end of the corresponding clamping sleeve (100), the front end of each clamping sleeve (100) corresponds to the corresponding gas heating cavity (101) and is connected with an exhaust pipe (112), the exhaust pipes (112) are communicated with the gas heating cavity (101), the rear end of the gas heating cavity (101) is open, the open is in a curved arc shape, a plurality of fans (113) are installed on the corresponding clamping sleeves (100) corresponding to the open, the plurality of fans (113) are arranged in an arc shape consistent with the open, and the air outlet ends of the fans (113) are arranged towards the gas heating cavity (101);

a plurality of heat-homogenizing plates (121) are arranged in the liquid heating cavity (102) along the front-back direction, and the plurality of heat-homogenizing plates (121) extend along the bending direction of the liquid heating cavity (102); form a aqua storage tank (122) between two adjacent even hot plates (121), the top of cutting ferrule (100) corresponds liquid heating chamber (102) is connected with even water pipe (123), the inner chamber of even water pipe (123) with liquid heating chamber (102) is linked together, the bottom of even water pipe (123) corresponds each aqua storage tank (122) has seted up respectively rather than matched with delivery port, the bottom of cutting ferrule (100) corresponds liquid heating chamber (102) is connected with a drain valve (124).

2. The waste heat recycling device of the power plant boiler as claimed in claim 1, wherein: the bottom of the heat homogenizing plate (121) is separated from the bottom wall of the inner cavity of the liquid heating cavity (102) by a gap, and the drain valve (124) is communicated with the gap.

3. The waste heat recycling device of the power plant boiler as claimed in claim 1, wherein: the inner wall of the liquid heating cavity (102) is coated with a non-stick coating, and the non-stick coating is a polytetrafluoroethylene coating.

4. The waste heat recycling device of the power plant boiler as claimed in claim 1, wherein: the inner side surface of the clamping sleeve (100) is attached with a graphene heat-conducting film (103).

5. The waste heat recycling device of the power plant boiler as claimed in claim 1, wherein: the outer wall of the cutting sleeve (100) is further sleeved with a layer of heat insulation cloth, and the heat insulation cloth is aluminum silicate fiber cloth.

6. The waste heat recycling device of the power plant boiler as claimed in claim 1, wherein: exhaust pipe (112) and drain valve (124) all communicate with a waste heat conveyer pipe, and this waste heat conveyer pipe is including the inner tube and the outer tube that the cover was established together, the inner tube inserts the inner chamber at the outer tube, drain valve (124) with the inner tube is linked together, exhaust pipe (112) with the outer tube is linked together.

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