CN210394352U

CN210394352U - Integrated anaerobic fermentation system

Info

Publication number: CN210394352U
Application number: CN201921115238.3U
Authority: CN
Inventors: 施兵
Original assignee: Jiangsu Marsh Grass Agricultural Technology Co Ltd
Current assignee: Jiangsu Marsh Grass Agricultural Technology Co Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-04-24
Anticipated expiration: 2029-07-16

Abstract

The utility model discloses an integration anaerobic fermentation system, wherein, this system mainly includes that the preliminary treatment collection deposits pond (1), multistage fermentation system, removes stirring facility (6), breaker (7), mucking machine (8) and screw pump (11), wherein, remove stirring facility (6) and breaker (7) and install in the preliminary treatment collection and deposit the pond, mucking machine (8) and screw pump (11) have a plurality ofly, install respectively in the preliminary treatment collection and deposit pond (1) and multistage fermentation system, the preliminary treatment collection is deposited pond (1) and multistage fermentation system and is all pour the shaping by concrete an organic whole.

Description

Integrated anaerobic fermentation system

Technical Field

The invention relates to the field of anaerobic fermentation, in particular to an integrated anaerobic fermentation system.

Background

Anaerobic fermentation is a mature garbage energy technology, and after garbage is converted into methane, the methane is convenient to transport and store, high in heat value, small in combustion pollution and wide in application.

At present, a traditional anaerobic fermentation system comprises pretreatment equipment, homogenizing and impurity removing equipment, an anaerobic fermentation tank and the like, and the whole anaerobic fermentation system has the defects of system dispersion, complex automatic program, much manpower participation and the like; the traditional anaerobic fermentation system is only suitable for the construction of small tank bodies by using steel welding tanks or Lipu steel tanks or concrete splicing tanks, and has high unit cost, high requirements on auxiliary engineering such as heat preservation, temperature rise, corrosion prevention and the like and high cost; secondly, the traditional anaerobic fermentation tank adopts central stirring, so that the energy consumption of the whole system is high, and the later maintenance cost is high; and, traditional anaerobic fermentation tank still exists to slag tap thoroughly, easily forms the collection sediment in the jar, leads to effective fermentation volume to diminish, the clearance difficulty to, traditional biogas engineering fermentation cylinder needs the scarfing cinder of about 5 years, and the pond needs the clearance every year is deposited in the preliminary treatment collection, and is with higher costs. Therefore, an anaerobic fermentation system which has low cost, high automation degree and simple and convenient operation and reduces the safety and environmental protection risks is urgently needed at present.

Disclosure of Invention

In order to solve the problems in the prior art, the technical scheme of the invention provides an integrated anaerobic fermentation system. The technical scheme is as follows:

the integrated anaerobic fermentation system comprises a pretreatment collection and storage tank, a multi-stage fermentation system, a mobile stirring facility, a crusher, a slag extractor and a screw pump, wherein the mobile stirring facility and the crusher are arranged in the pretreatment collection and storage tank; the crusher is mainly used for separating impurities and crushing impurities before the primary fermentation tank, so that a feeding system is prevented from being blocked or damaged; the slag extractor is arranged in the pretreatment collecting and storing pool and is mainly used for discharging sand and sundries, and the slag extractor is arranged in the multistage fermentation pool and is mainly used for discharging deposited biogas residues; the screw pump is used for feeding and discharging slag, and mainly pumps the biogas residues and impurities deposited at the bottom of the tank to a solid-liquid separator for solid-liquid separation or circulates in a fermentation tank to ensure that the fermentation is sufficient.

Further, the multistage fermentation system includes one-level fermentation system, two-level fermentation system, tertiary fermentation system, level four fermentation system, and wherein, each level fermentation system connects the setting in proper order.

Furthermore, the anaerobic fermentation system also comprises a temperature increasing system and a biogas circulating air inlet stirring system, wherein the temperature increasing system and the biogas circulating air inlet stirring system are both arranged in the first-level fermentation tank, the second-level fermentation tank and the third-level fermentation tank, and the temperature increasing system is mainly used for increasing the temperature of the fermented materials to maintain the fermentation system at the optimal fermentation temperature; the biogas circulating air inlet stirring system is mainly used for air blowing and stirring, so that gas and liquid of fermentation products are separated, fermentation is more sufficient, and the gas production efficiency is increased.

Further, the temperature increasing system is an inner temperature increasing pipeline.

Further, the biogas digester also comprises a biogas collecting system and a biogas slurry discharge pipeline; the biogas collection system is respectively connected with each level of fermentation system.

Further, the biogas collection system is a double-membrane gas storage cabinet.

Furthermore, the external parts of the pretreatment collecting and storing tank and the multistage fermentation system are stainless steel embedded parts.

Further, the slag discharging machine is a tipping bucket type slag discharging machine.

Compared with the prior art, the technical scheme of the invention at least has the following beneficial effects:

(1) compared with the traditional anaerobic fermentation system, the integrated anaerobic fermentation system adopts concrete pouring semi-underground facilities, reduces the manufacturing cost, reduces the heat preservation and corrosion prevention work, reduces the equipment investment and the later operation and maintenance, and reduces the energy consumption and the maintenance cost.

(2) The push type slag removal is adopted, so that the slag removal work of the traditional anaerobic tank is reduced.

(3) Three-stage anaerobic fermentation is adopted, so that the fermentation is more sufficient, the solid content of the overflowing biogas slurry is lower, and the recycling is easier.

(4) Compared with the biogas slurry pool of the traditional biogas project, the biogas slurry pool is difficult to seal, and a large amount of biogas, hydrogen sulfide and ammonia gas are discharged; this patent system adopts the concrete to seal, has reduced giving off of smell, has strengthened environmental protection.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a front view of an integrated anaerobic fermentation system according to an embodiment of the present invention;

FIG. 2 is a side view of an integrated anaerobic fermentation system according to an embodiment of the present invention

Wherein: 1-a pretreatment collection and storage pool, 2-a primary fermentation system, 3-a secondary fermentation system, 4-a tertiary fermentation system, 5-a quaternary fermentation system, 6-a mobile stirring facility, 7-a crusher, 8-a tipping bucket slag extractor, 9-an internal heating pipeline, 10-a biogas circulating air inlet stirring system, 11-a screw pump for feeding and deslagging, 12-a biogas collection system and 13-a biogas slurry discharge pipeline.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, there are provided front and side views of an integrated anaerobic fermentation system according to an embodiment of the present invention, the integrated anaerobic fermentation system comprising: the system comprises a pretreatment collecting and storing pool 1, a primary fermentation system 2, a secondary fermentation system 3, a tertiary fermentation system 4, a quaternary fermentation system 5, a movable stirring facility 6, a crusher 7, a tipping bucket type slag extractor 8, an internal heating pipeline 9, a biogas circulating air inlet stirring system 10, a screw pump 11, a biogas collecting system 12 and a biogas slurry discharge pipeline 13. The mobile stirring facility 6 is arranged in the pretreatment collecting and storing pool 1 and is mainly used for stirring and diluting the waste and separating and precipitating large-particle impurities; the crusher 7 is arranged in the pretreatment collecting and storing tank 1, is used for separating impurities and crushing the impurities before going to the first fermentation tank, and prevents a feeding system from being blocked or damaged; the tipping bucket type slag extractor 8 is arranged in the pretreatment collecting and storing pool, the first, second, third and fourth-level fermentation pools, the pretreatment collecting and storing pool 1 is mainly used for discharging sand and sundries, and the first, second, third and fourth-level fermentation pools are mainly used for discharging deposited biogas residues; the inner heating pipeline 9 is arranged in the first, second and third fermenting tanks and is mainly used for heating the fermenting materials to maintain the fermenting system at the optimal fermenting temperature; the biogas circulating air inlet stirring system 10 is arranged in the first, second and third-stage fermentation tanks and is mainly used for air-blowing stirring, so that the fermentation product is subjected to gas-liquid separation, the fermentation is more sufficient, and the gas production efficiency is increased; the screw pump 11 is used for feeding and deslagging, is respectively arranged in the pretreatment collecting and storing tank 1, the first-stage fermentation tank, the second-stage fermentation tank, the third-stage fermentation tank and the fourth-stage fermentation tank, and mainly pumps the biogas residues and impurities deposited at the bottom of the tank to a solid-liquid separator for solid-liquid separation or circulates in the fermentation tank to ensure that the fermentation is full.

It is pointed out that the pretreatment collecting tank 1 and the first, second, third and fourth-stage fermentation tanks in the embodiment of the invention are all of an integrated concrete structure, so that the cost is reduced, and simultaneously, the good heat preservation and corrosion resistance can be ensured; and the external parts of the pretreatment collecting tank 1 and the first, second, third and fourth-stage fermentation tanks are stainless steel embedded parts so as to improve the corrosion resistance and the connection sealing performance.

According to a preferred embodiment of the present invention, the workflow is as follows: raw materials enter from the pretreatment collecting and storing pool 1, impurities can be separated and precipitated under the retention time of 24 hours through the separation of the movable stirring facility 6, the impurities are removed for use through the tipping bucket type slag extractor 8, the materials enter the primary fermentation system 2 through the crusher 7 under the action of gravity after the retention time is enough (the liquid level is reached and the material is stopped), and the energy consumption is reduced; the system can be fed by a screw pump 11 in a starting stage; after 15 days of retention time in the primary fermentation system 2, the biogas circulating air inlet stirring system 10 is used for starting and stirring for 10 minutes per hour, so that the wrapped organic matters are thoroughly separated, the gas production is improved (the screw pump 11 is used for liquid circulating stirring in the early stage without gas collection), and biogas is collected by the biogas collection system 12 for desulfurization; after staying for 15 days, overflowing from the primary fermentation system 2 to the secondary fermentation system 3, starting and stirring for 10 minutes by using a biogas circulating air inlet stirring system 10 every hour, so that the coated organic matters are thoroughly separated, the gas yield is improved, and biogas is collected by a biogas collection system 12 for desulfurization; after the secondary fermentation system 3 stays for 5 days, the sewage overflows from the secondary fermentation system 3 to the tertiary fermentation system 4, a biogas circulating air inlet stirring system 10 is used for starting and stirring for 10 minutes every 2 hours, so that organic matters are fully fermented, and biogas is collected by a biogas collection system 12 to remove sulfur; after the third-level fermentation system 4 stays for 5 days, the materials are fermented basically completely, separation equipment is connected to an outlet of the third-level fermentation system 4, concentrated liquid enters a solid-liquid separation system, biogas slurry enters a fourth-level fermentation system 5, and when the overflow liquid level is reached, the concentrated liquid enters a field biogas slurry temporary storage pool or a liquid fertilizer workshop through a biogas slurry discharge pipeline 13 to produce liquid organic fertilizer. Along with the extension of the fermentation feeding time, slag can be collected in the first-stage, second-stage, third-stage and fourth-stage fermentation systems, the slag is periodically discharged through the tipping bucket slag extractor 8 and the screw pump 11 to remove solid and separate, and the tank cleaning is avoided or the tank cleaning period is prolonged.

In addition, in this embodiment, 20cm of civil engineering reinforced concrete 15000 flat, 3000 square concrete, about 120 ten thousand is used; rebar 0.048 x 15000 x 4000, about 280 ten thousand; an affiliated facility of about 400 million; a total of about 800 million; compared with the traditional steel can cost, the steel can with the square of 30000 has the thickness of 10mm and the thickness of about 1100 tons, and the steel and labor are about 8500 yuan/ton and about 935 ten thousand; 150 thousands of heat preservation and corrosion prevention, 50 thousands of heating pipelines, 300 thousands of stirring, and total 1435 thousands (no facilities such as civil engineering foundation, pile foundation engineering, pretreatment and the like are contained); the price is reduced by about 600 ten thousand compared with the steel can.

It should be noted that: in the working process of the integrated anaerobic fermentation system provided in the above embodiment, only the division of the working modes of the above components is exemplified, and in practical applications, the above embodiments may be reasonably combined or independently completed as needed to complete all or part of the above described functions.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an integration anaerobic fermentation system, its characterized in that, the system includes that the pond is deposited to the preliminary treatment collection (1), multistage fermentation system, removes stirring facility (6), breaker (7), mucking machine (8) and screw pump (11), wherein, remove stirring facility (6) and breaker (7) and install in the pond is deposited to the preliminary treatment collection, mucking machine (8) and screw pump (11) have a plurality ofly, install respectively in the pond is deposited to the preliminary treatment collection (1) and multistage fermentation system, the pond is deposited to the preliminary treatment collection (1) and multistage fermentation system all is by concrete integrated into one piece.

2. The integrated anaerobic fermentation system according to claim 1, wherein the multi-stage fermentation system comprises a first-stage fermentation system (2), a second-stage fermentation system (3), a third-stage fermentation system (4) and a fourth-stage fermentation system (5), wherein the fermentation systems are sequentially connected.

3. The integrated anaerobic fermentation system of claim 2, further comprising a temperature increasing system (9) and a biogas circulating air intake stirring system (10), wherein the temperature increasing system (9) and the biogas circulating air intake stirring system (10) are respectively installed in the first fermentation tank, the second fermentation tank and the third fermentation tank.

4. The integrated anaerobic fermentation system according to claim 3, wherein the warming system (9) is an internal warming pipeline.

5. The integrated anaerobic fermentation system according to any one of claims 1 to 4, wherein: the biogas digester also comprises a biogas collection system (12) and a biogas slurry discharge pipeline (13); the biogas collection system (12) is respectively connected with each stage of fermentation system.

6. The integrated anaerobic fermentation system of claim 5, wherein: the biogas collection system (12) is a double-membrane gas storage cabinet.

7. The integrated anaerobic fermentation system according to any one of claims 1 to 4, wherein: the external parts of the pretreatment collecting and storing tank (1) and the multistage fermentation system are stainless steel embedded parts.

8. The integrated anaerobic fermentation system according to any one of claims 1 to 4, wherein: the slag extractor (8) is a tipping bucket type slag extractor.