JPH0441999Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a pretreatment device for anaerobic treatment of organic waste.

(Prior Art) Devices for preheating the raw materials to be processed to be input into the main fermentation tank have been proposed, for example, in
Publication No. 180296 discloses that a solubilization tank is provided in contact with the liquid in the settling tank, and the contents of both tanks are able to receive and transfer heat to each other through the walls of the solubilization tank. A device is shown for maintaining a constant temperature of the contents therein.

(Problems to be solved by the invention) Regarding the above conventional technology, the device described in JP-A-58-180296 has a complicated structure, a solubilization tank, a sedimentation tank, and a methane fermentation tank. Since it has an integrated structure, there is a drawback that an accident such as a blockage of the solubilization tank can lead to immediate shutdown of the entire device.

(Means for solving the problem) This idea was arrived at as a result of research to eliminate the above-mentioned deficiencies. By partitioning the inside of one tank with a partition wall, the first and second desorbed liquid chambers and the first and second desorbed liquid chambers are separated. The second stock solution chambers are formed in a substantially alternating arrangement, and the first and second desorption solution chambers and the first and second stock solution chambers are connected in series in the lower part of the tank. This problem could be solved by making this structure independent from the main fermenter and connecting it to the main fermenter simply by a connecting pipe.

(Example) This invention will be explained below using an example shown in the drawings.

FIG. 1 is a perspective view schematically showing the main parts of the entire preprocessing device of this invention, and FIGS.
The figures are a plan view of the preprocessing device shown in FIG. 1 above, and A-
A vertical cross-sectional view taken along line A' and a side view seen from the left in FIG. 1 are shown.
The pretreatment device of this invention is the main fermenter (not shown).
By connecting the discharge pipe 18 (described later) to the supply part (not shown) of the main fermenter, the raw solution to be processed processed by the pre-treatment device is adapted to flow into the main fermenter. It is constructed by skillfully combining the flow path for the desorbed liquid and the flow path for the stock solution to be treated.

The pretreatment device of this invention has side walls 2a, 2b, 2
c and 2d and the bottom part 3 constitute a tank 1, and the internal space of this tank 1 is divided by partition walls 5, 6 and 7a, 7b, 7.
It has a very simple structure divided by c. In Fig. 1, the side walls 2a,
A second desorbed liquid chamber 8- formed by 2c, 2d and the partition wall 5
2. A first wall formed by side walls 2a, 2c and partition walls 5, 6
Processed stock solution chamber 9-1, side wall 2b and partition walls 7a, 7
a second stock solution chamber 9 surrounded by b and 7c;
-2, the space formed by the side walls 2a, 2b, 2c and the partition wall 6 is divided into four chambers: a square-shaped first desorbed liquid chamber 8-1 excluding the second stock solution chamber 9-2; It is divided by By partitioning in this way, in the example of FIG. 1, the second desorbed liquid chamber 8-
2. First treated liquid chamber 9-1, first desorbed liquid chamber 8-
1. The arrangement order of the second unprocessed liquid chamber 9-2 is the first unprocessed liquid chamber 9-1 and the second unprocessed liquid chamber 9-2.
are arranged in a series below tank 1 as shown in the figure.
Similarly, the first desorbed liquid chamber 8-1 and the second desorbed liquid chamber 8-2
They also form a series below tank 1. In order to achieve such a continuous structure, various means are possible as long as consideration is given to prevent blockage caused by coarse foreign matter in this communication part. Both sides of the lower part of the stock solution chamber 9-1 to be processed are narrowed to the width La of the second stock solution chamber 9-2,
The lower mouth edge 12 of this constriction part 10 is composed of a side wall 11a having a width equal to the width La, and side walls 11b and 11c having a width equal to the distance Lb between the partition wall 5 and the partition wall 7b. A square-shaped frame 13 that spans the lower portions of both the chamber 9-1 and the first desorbed liquid chamber 8-1.
The frame 13 is fixed to the upper edge of the frame 13 as shown in the figure.
are fixed to the bottom 3 of the tank 1 and the partition wall 7b, respectively, as shown in the figure, and then the upper opening 14 of the frame body 13 is sealed to form a closed frame, and the lower part of the partition wall 7b to which the frame body 13 is fixed is cut. Notched and opened. By doing so, the first untreated liquid chamber 9-1 and the second unprocessed liquid chamber 9-2 sandwich the first desorbed liquid chamber 8-1 and communicate with each other through the constriction part 10 and the closing frame 13. , the first desorbed liquid chamber 8-1 and the second desorbed liquid chamber 8-2 are connected to the constricted portion 10 of the first stock liquid chamber 9-1, the frame 13 following this, and the side walls 2a, 2c. They communicate through gaps 15, 15 formed between them, so that the desorbed liquid chambers and the treated raw liquid chambers are substantially alternately arranged.

The basic structure of this invention is as described above, and various changes are allowed without changing this structure. For example, the rectangular tank shown in the example can be made into a circular, elliptical, etc. shape, and especially the lower part of the tank can be changed. It is also possible to make the portion arc-shaped to prevent sludge and the like from depositing. In addition, in this invention, the heat retained in the desorbed liquid is transferred to the raw solution to be treated through the partition wall, so the partition wall used for this purpose is made of a material with good heat transfer and has a certain degree of rigidity and heat resistance. There is no particular restriction as long as it is done.

Reference numerals 16 and 17 are introduction parts for the stock solution to be treated and desorption liquid, respectively, and numerals 18 and 19 are discharge parts for the stock solution to be processed and the desorption liquid, respectively.

Incidentally, the upper part of the tank 1 may be either open or closed. Reference numeral 20 denotes a discharge port for sludge, foreign matter, and impurities mixed into the stock solution to be treated, which is provided close to the bottom 3 of the tank 1 and is connected to the frame 13. Reference numeral 21 denotes a discharge port for discharging sludge or the like mixed into the desorption liquid, which is provided on the side wall 2d below the second desorption liquid chamber 8-2 and close to the bottom 3. 22 is a second raw solution chamber 9-2 as required.
The opening 23 is left in the center of the opening 23 so that the desorbed liquid can flow from the first desorbed liquid chamber 8-1 surrounding the second stock liquid chamber 9-2. It overhangs the tsuba-sama. A baffle plate 24 is placed below the opening 23 and is slightly larger than the aperture.The aperture 23 and the baffle plate 24 prevent channeling and provide appropriate turbulence to the flow. Reference numeral 25 designates a mounting base for a pump or other discharge device, which is installed at an appropriate position in the second desorbed liquid chamber 8-2.

This device is constructed as described above, and during operation, the desorbed liquid (usually having a temperature of about 40°C) discharged from the methane fermentation tank is introduced into the desorbed liquid inlet 17 of the device. When supplied to the first desorbed liquid chamber 8-1, some of the liquid flows into the second desorbed liquid chamber 8-2 through the gaps 15, 15 below the first stock liquid chamber 9-1. The desorbed liquid flows into and is stored in the first desorbed liquid chamber 8-1. In this state, the stock solution to be processed is then introduced from the stock solution introduction section 16 into the first stock solution chamber 9-1.
When the stock solution is supplied to the first stock solution chamber 9, the stock solution to be processed is supplied to the first stock solution chamber 9.
-1 flows into the second treated stock solution chamber 9-2 through the lower constriction section 10 and the frame body 13. While maintaining this state, the desorbed liquid and When the raw solution to be treated is forcibly discharged, the desorbed liquid flows from the upper part of the first desorbed liquid chamber 8-1 through the gaps 15 and 15 in the lower part of the first desorbed liquid chamber 8-1, as shown by the arrow in FIG. 8-2
The flow is a so-called 〓 type flow toward the upper part, and on the other hand, the flow of the stock solution to be processed is from the upper part of the first stock solution chamber 9-1 to the lower part through the constriction part 10 and the frame 13 to the second stock solution chamber 9-1. -2, the flow becomes a 〓-type flow toward the top of 2, so when the two flows are combined, it becomes a 〓-type counterflow, which increases the chances of heat transfer between the desorbed liquid and the raw solution to be treated through the partition wall, which is effective. It is true.

(Effects) When using the pretreatment device of this invention, the structure is extremely simple, and there is no sludge, foreign matter, etc. in the raw solution to be treated.
Even if coarse contaminants are mixed in, stable operation is possible at all times because there are no parts in the device that can cause blockages, and the desorbed liquid and the raw liquid to be treated flow in substantially countercurrent flow through the partition wall. Since the heat transfer is carried out efficiently, it is extremely useful for pre-treatment of livestock waste that is often contaminated with contaminants.

[Brief explanation of the drawing]

Fig. 1 is a perspective view illustrating the overall outline of the preprocessing device of this invention, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a plan view of Fig. 1.
The figure is a longitudinal sectional view taken along the line A-A' in FIG. 1, and FIG. 4 is a left side view of FIG. 1. In the figure, 1...tank, 5, 6, 7a, 7b, 7c...
...Partition wall, 8-1...First desorbed liquid chamber, 8-2...Second desorbed liquid chamber, 9-1...First treated stock solution chamber, 9-
2...Second processed liquid chamber, 10...Aperture section, 13
...Frame, 15...Void.

Claims (1)

[Claims for Utility Model Registration] The space inside the tank 1 is successively partitioned from one side to the other by partition walls 5, 6, and partition walls 7a, 7b, and 7c, and a second desorbed liquid chamber 8-2 is provided. , first processed stock solution chamber 9-
1. First desorbed liquid chamber 8-1 and second unprocessed liquid chamber 9
-2 are arranged in this order, the first stock solution chamber 9-1 to be treated and the second stock solution chamber 9 to be processed.
-2 sandwiching the first desorbed liquid chamber 8-1, and the first unprocessed liquid chamber 9-1 and the first desorbed liquid chamber through the constriction part 10 at the lower part of the first unprocessed liquid chamber 9-1. The second desorbed liquid chamber 8-2 and the first desorbed liquid chamber 8-1 communicate with each other through the outer gap 15 of the constricted part 10 and the frame 13. The first desorbed liquid chamber 8-1, the second desorbed liquid chamber 8-2, the second unprocessed liquid chamber 9-2, and the first unprocessed liquid chamber 9-1.
A heat exchange type pretreatment device characterized by having substantially alternating arrays.