CN217459437U

CN217459437U - Agricultural and forestry waste treatment system utilizing anaerobic fermentation waste heat

Info

Publication number: CN217459437U
Application number: CN202221301873.2U
Authority: CN
Inventors: 唐亚楠; 刘墨; 于家伊
Original assignee: Beijing Siliang Technology Co ltd
Current assignee: Beijing Siliang Technology Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-09-20
Anticipated expiration: 2032-05-27

Abstract

The utility model discloses an agriculture and forestry waste treatment system utilizing anaerobic fermentation waste heat, which comprises a biogas slurry storage pool; the homogenizing tank is communicated with the biogas slurry storage tank through a pipeline, a stirrer is arranged in the homogenizing tank, and first heating coils are uniformly and annularly arranged on the inner wall of the periphery of the homogenizing tank; the anaerobic reactor is communicated with a homogenizing pool pipeline, a side stirrer is arranged in the anaerobic reactor, second heating coils are uniformly distributed on the inner wall of the anaerobic reactor, and an air storage film is arranged at the top of the anaerobic reactor; the solid-liquid separator is communicated with the anaerobic reactor; the discharge tank is communicated with the solid-liquid separator; waste heat recovery coil pipe, its one end and the discharge gate intercommunication of play feed tank, the other end through with the inner wall all around of homogenate pond around arrange in letting in the waste liquid pond, the utility model discloses the remaining mixture after will fermenting separates and forms solid phase and liquid phase to through the waste heat recovery coil pipe with the liquid phase pump sending to the homogenate pond in, form the spacer tube heating to the material in the homogenate pond, return the waste heat again and use the system in, improved the availability factor of resource.

Description

Agricultural and forestry waste treatment system utilizing anaerobic fermentation waste heat

Technical Field

The utility model relates to an agriculture and forestry waste treatment technical field, in particular to utilize agriculture and forestry waste treatment system of anaerobic fermentation waste heat.

Background

Agricultural and forestry wastes are important biomass resources and also important renewable resources. In general, the agricultural and forestry wastes include rice hulls, straw, sugarcane residue, wood chips, sawdust, bamboo shavings, bamboo filaments, animal wastes, and the like. With the continuous improvement of environmental awareness of people, a technology for utilizing agricultural and forestry wastes for secondary utilization of energy appears in modern society, wherein a common mode is to perform anaerobic fermentation on the agricultural and forestry wastes to generate biogas for combustion and generate electricity. In this process, a large amount of heat is usually generated, and thus the remainder of the fermentation is accompanied by residual heat, which can be utilized, in practice, if appropriate. However, the existing treatment system usually directly discards and cleans the part of fermented residues as waste materials, which causes a great loss of residual heat and unnecessary waste of resources.

SUMMERY OF THE UTILITY MODEL

To the technical problem who mentions in the background art, the utility model provides an ability rational utilization after the fermentation surplus waste treatment system of agriculture and forestry among the mixed product.

The utility model adopts the following technical proposal: the utility model provides an utilize agriculture and forestry discarded object processing system of anaerobic fermentation waste heat, carries out electrical control through automatic control system, and processing system includes: the biogas slurry storage pool is used for uniformly collecting conveyed materials; the homogenizing tank is communicated with the biogas slurry storage tank through a pipeline, materials in the biogas slurry storage tank are extracted through a conveying pump and then are subjected to homogenizing preheating operation, a stirrer used for stirring the materials is arranged in the homogenizing tank, and first heating coils are uniformly and annularly arranged on the inner wall of the periphery of the homogenizing tank; the anaerobic reactor is communicated with the homogenizing pool pipeline, the materials treated by the homogenizing pool are extracted through a conveying pump, and fermentation operation is carried out on the materials according to the types of the materials, a side stirrer is arranged in the anaerobic reactor, second heating coils are uniformly distributed on the inner wall of the anaerobic reactor, and a gas storage film is arranged at the top of the anaerobic reactor and used for collecting and storing methane generated after the materials are fermented; the solid-liquid separator is communicated with the anaerobic reactor, extracts a mixed product after the material fermentation through a conveying pump, and performs solid-liquid separation operation on the mixed product; the discharge tank is communicated with the solid-liquid separator and is used for collecting a liquid phase generated after the solid-liquid separator separates; and one end of the waste heat recovery coil pipe is communicated with a discharge hole of the discharge tank, and the other end of the waste heat recovery coil pipe is led into the waste liquid tank after being arranged around the inner wall around the homogenizing tank.

Furthermore, a sludge discharge pipe is arranged at the bottom of the anaerobic reactor, and an overflow pipe is arranged at the top of the anaerobic reactor.

Furthermore, the waste heat recovery coil pipe is a seamless carbon steel pipe, and a galvanized anticorrosive layer or an epoxy coal tar pitch anticorrosive layer is optionally coated on the surfaces of the inner layer and the outer layer of the waste heat recovery coil pipe.

Further, the waste heat recovery coil pipe is located below the liquid level in the homogenizing pool.

Furthermore, the automatic control system comprises a PLC-touch screen automatic control system, and a power driving system and a plurality of electromagnetic valves which are electrically connected with the PLC-touch screen automatic control system, and the plurality of electromagnetic valves are controlled by a program of the PLC-touch screen automatic control system.

Compared with the prior art, the utility model has the advantages of: the utility model discloses an utilize agriculture and forestry waste processing system of anaerobic fermentation waste heat is connected with anaerobic reactor through setting up solid-liquid separator, and the remaining mixture separation after will fermenting forms solid phase and liquid phase to through connect the waste heat recovery coil pipe in the discharging pool, through the waste heat recovery coil pipe with the liquid phase pump sending to the homogenate pond in, form the spacer tube heating to the material in the homogenate pond, return the waste heat again and use the system in, reduce the energy consumption, improved the availability factor of resource.

Drawings

FIG. 1 is a schematic view of the overall structure of the agricultural and forestry waste treatment system using anaerobic fermentation waste heat of the present invention;

wherein: 1-biogas slurry storage tank, 2-homogenate pool, 3-first heating coil, 4-anaerobic reactor, 5-second heating coil, 6-gas storage membrane, 7-solid-liquid separator, 8-discharge pool, 9-waste heat recovery coil, 10-mud pipe and 11-overflow pipe.

Detailed Description

Hereinafter, in order to facilitate the technical solution of the present invention to be understood by those skilled in the art, further description will be made with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention.

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1, the overall structure of the agricultural and forestry waste treatment system using anaerobic fermentation waste heat in this embodiment is schematically shown, the system is electrically controlled by an automatic control system, in this embodiment, the automatic control system can be controlled by a PLC-touch screen automatic control system, the whole treatment system at least comprises a biogas slurry storage tank 1, a homogenizing tank 2, an anaerobic reactor 4, a solid-liquid separator 7 and a discharge tank 8, and materials are pumped by a pump during the transmission process of the system.

In this embodiment, natural pond liquid storage pool 1 mainly used collects the material of carrying in unison, during the concrete implementation, can be the transport vechicle pour into this natural pond liquid storage pool 1 after collecting in unison. The homogenizing tank 2 is communicated with the biogas slurry storage tank 1 through a pipeline, after materials in the biogas slurry storage tank 1 are extracted through a conveying pump, the materials are homogenized and preheated in the homogenizing tank 2, and the process aims at increasing the temperature of the materials. Dispose the agitator that is used for stirring the material in the homogenate pond 2, first heating coil 3 is evenly encircled to the inner wall all around of homogenate pond 2, and first heating coil 3 accessible boiler provides hot water and carries out the tube-separating heating to the hot water in the homogenate pond 2. During the concrete implementation, can encircle according to actual need and establish a plurality of rings first heating coil 3 to adjust the temperature of hot water in heating coil 3 through automatic control system.

The anaerobic reactor 4 is communicated with the homogenizing pool 2 through a pipeline, materials processed by the homogenizing pool 2 are extracted through a conveying pump, and fermentation operation is carried out on the materials according to the types of the materials, for example, the fermentation time of excrement generally lasts for about 15-20 days, the fermentation time of straws generally lasts for about 25 days, and the specific implementation can be programmed by adopting an automatic control system. In this embodiment, the anaerobic reactor 4 may be an integrated full mixing type anaerobic reactor CSTR, which may be selected according to specific situations, and is not limited herein. A side stirrer is arranged in the anaerobic reactor 4 to continuously stir the material. The second heating coil 5 is uniformly distributed on the inner wall of the anaerobic reactor 4, and the second heating coil 5 can provide hot water through a boiler to provide adaptive temperature for fermentation operation. The top of the anaerobic reactor 4 is provided with a gas storage film 6 for collecting the methane generated after the fermentation of the materials.

One of the innovative points of this embodiment is that after the conventional treatment system produces biogas by fermentation, the remaining mixture is directly passed to a collection tank for disposal or disposal. In the embodiment, the solid-liquid separator 7 is set to be communicated with the anaerobic reactor 4, the mixture is extracted by a conveying pump and fermented, and then the mixture is subjected to solid-liquid separation to form a slag phase and a liquid phase, wherein the slag phase is left in the solid-liquid separator 7 for subsequent treatment, the liquid phase flows into a discharge tank 8 with the rear end communicated with the solid-liquid separator 7, the discharge tank 8 is used for collecting the liquid phase generated after separation by the solid-liquid separator 7, a discharge port of the discharge tank 8 is connected with a waste heat recovery coil pipe 9, one end of the waste heat recovery coil pipe 9 is communicated with the discharge port of the discharge tank 8, and the other end of the waste heat recovery coil pipe is circularly arranged with the peripheral inner wall of the homogenizing tank 2 and then is introduced into a waste liquid tank. Therefore, in the embodiment, the residual heat in the remaining mixture liquid phase is used for forming the isolation pipe for heating the material in the homogenizing pool, so that the residual heat is returned again and acts on the system, the energy consumption is reduced, and the use efficiency of resources is improved. Of course, in specific implementation, whether the waste heat recovery coil pipe 9 is turned on or not and the size of the introduced liquid phase quantity can be selected according to seasons to control the heating temperature of the material.

In addition, in some embodiments, the bottom of the anaerobic reactor 4 is further provided with a sludge discharge pipe 10, the top of the anaerobic reactor 4 is provided with an overflow pipe 11, and the sludge discharge pipe 10 is provided with an electromagnetic valve, so that the anaerobic reactor 4 can be controlled to carry out periodic sludge discharge operation through the automatic control system control program design, the purpose of removing the deposited materials at the bottom of the anaerobic reactor 4 is achieved, the smoothness and the convenience of project operation are improved, the service life of the anaerobic reactor 4 is prolonged, and the operation stability of the system is ensured to the maximum extent. The overflow pipe 11 can control the overflow part of the materials by an automatic control system when the storage amount in the anaerobic reactor 4 is excessive.

In addition, in this embodiment, the waste heat recovery coil pipe 9 is a seamless carbon steel pipe, thereby avoiding the occurrence of liquid phase leakage, and the inner and outer surfaces of the waste heat recovery coil pipe 9 are optionally covered with a galvanized anticorrosive layer or an epoxy coal tar pitch anticorrosive layer, thereby improving the corrosion resistance of the waste heat recovery coil pipe 9. Meanwhile, when the position of the waste heat recovery coil pipe 9 in the homogenizing pool 2 is set, the waste heat recovery coil pipe 9 is generally controlled to be below the liquid level in the homogenizing pool 2, so that the phenomenon that the waste heat recovery coil pipe 9 is in excessive contact with external oxygen to cause corrosion is prevented.

In this embodiment, the automatic control system further includes a plurality of electromagnetic valves and a power driving system electrically connected to the PLC-touch screen automatic control system, the plurality of electromagnetic valves are connected to the pipeline connected to each device, for example, between the homogenate pool 2 and the biogas slurry storage pool 1, between the homogenate pool 2 and the anaerobic reactor 4, etc., and the plurality of electromagnetic valves are controlled by the program of the PLC-touch screen automatic control system to control the system to convey the material regularly and quantitatively. The power driving system is used for providing kinetic energy for the system, which is prior art and will not be described herein.

To sum up, the utility model discloses an utilize agriculture and forestry waste processing system of anaerobic fermentation waste heat is connected with anaerobic reactor through setting up solid-liquid separator, and the remaining mixture separation after will fermenting forms solid phase and liquid phase to through connect the waste heat recovery coil pipe in the discharging pond, through the waste heat recovery coil pipe with the liquid phase pump send to the homogenate pond in, form the spacer tube heating to the material in the homogenate pond, return the waste heat again and use the system in, reduce the energy consumption, improved the availability factor of resource.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides an utilize agriculture and forestry discarded object processing system of anaerobic fermentation waste heat which characterized in that carries out electrical control through automatic control system, and processing system includes:

the biogas slurry storage pool (1) is used for uniformly collecting conveyed materials;

the homogenizing pool (2) is communicated with the biogas slurry storage pool (1) through a pipeline, materials in the biogas slurry storage pool (1) are extracted through a delivery pump and then homogenized and preheated, a stirrer for stirring the materials is arranged in the homogenizing pool (2), and first heating coils (3) are uniformly and annularly arranged on the inner walls of the periphery of the homogenizing pool (2);

the anaerobic reactor (4) is communicated with the homogenizing pool (2) through a pipeline, materials processed by the homogenizing pool (2) are extracted through a conveying pump and are fermented according to the types of the materials, a side stirrer is arranged in the anaerobic reactor (4), second heating coils (5) are uniformly distributed on the inner wall of the anaerobic reactor (4), and an air storage film (6) is arranged at the top of the anaerobic reactor (4) and used for collecting methane generated after the materials are fermented;

the solid-liquid separator (7) is communicated with the anaerobic reactor (4), and is used for extracting a mixed product after the material fermentation through a delivery pump and carrying out solid-liquid separation operation on the mixed product;

the discharge tank (8) is communicated with the solid-liquid separator (7) and is used for collecting a liquid phase generated after the separation of the solid-liquid separator (7);

and one end of the waste heat recovery coil pipe (9) is communicated with a discharge hole of the discharge tank (8), and the other end of the waste heat recovery coil pipe is led into the waste liquid tank after being arranged around the inner wall around the homogenizing tank (2).

2. The agricultural and forestry waste treatment system using the waste heat of anaerobic fermentation according to claim 1, wherein a sludge discharge pipe (10) is arranged at the bottom of the anaerobic reactor (4), and an overflow pipe (11) is arranged at the top of the anaerobic reactor.

3. The agricultural and forestry waste treatment system using anaerobic fermentation waste heat according to claim 2, wherein the waste heat recovery coil pipe (9) is a seamless carbon steel pipe, and a galvanized anticorrosive layer or an epoxy coal tar pitch anticorrosive layer is optionally coated on the surfaces of the inner layer and the outer layer of the waste heat recovery coil pipe.

4. The agricultural and forestry waste treatment system using anaerobic fermentation waste heat according to claim 3, wherein the waste heat recovery coil (9) is located below the liquid level in the homogenate tank (2).

5. The agricultural and forestry waste treatment system using anaerobic fermentation waste heat according to claim 1, wherein the automatic control system comprises a PLC-touch screen automatic control system, and a power driving system and a plurality of electromagnetic valves which are electrically connected with the PLC-touch screen automatic control system, and the plurality of electromagnetic valves are controlled by a program of the PLC-touch screen automatic control system.