CN110951606A

CN110951606A - Methane-producing anaerobic reactor and process for treating kitchen slurry

Info

Publication number: CN110951606A
Application number: CN201911131680.XA
Authority: CN
Inventors: 袁珍凤; 唐红玲; 高瑞丽
Original assignee: Wuxi Masun Environmental Energy Technology Co ltd
Current assignee: Wuxi Masun Environmental Energy Technology Co ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-04-03

Abstract

The invention discloses a biogas production anaerobic reactor and a biogas production anaerobic reactor process for treating kitchen slurry, wherein the kitchen slurry in a reactor tank body is subjected to first circulating heat exchange and second circulating heat exchange; the first circulation heat exchange comprises the step of exchanging heat of part of liquid discharged from the top in the reactor tank body, and the liquid after heat exchange is mixed with the kitchen pretreatment slurry and then enters the bottom of the reactor tank body; the second circulation heat exchange comprises discharging from the middle upper part of the reactor tank body, and performing tank top spraying feeding or tank bottom annular feeding on the discharging from the middle upper part of the reactor tank body. The operation is stable. The invention has the advantages of increasing the circulating heat exchange system to strengthen heat exchange and optimize discharging, preventing scale formation, impact resistance, water resistance and temperature change, increasing the vertical circulation of materials, enhancing the contact efficiency of microorganisms and substrates, avoiding the acidification of the anaerobic reactor, improving the anaerobic reaction efficiency and realizing the stable operation of the anaerobic reactor.

Description

Methane-producing anaerobic reactor and process for treating kitchen slurry

Technical Field

The invention belongs to the technical field of kitchen waste treatment, particularly relates to the technical field of equipment for kitchen waste anaerobic fermentation, and particularly relates to a biogas-producing anaerobic reactor and a biogas-producing anaerobic reactor for treating kitchen slurry.

Background

The kitchen waste contains extremely high moisture and organic matters, is easy to decay and generates stink. The biogas can be converted into clean and renewable energy biogas through anaerobic fermentation production treatment, so that the kitchen waste is harmless, and the application prospect is wide. The key equipment for realizing anaerobic fermentation treatment of the kitchen waste is an anaerobic reactor. Anaerobic reactors have been reported in a number of prior art.

Chinese patent application No. ZL 201620341508.2, application date 2016.04.21, No. CN 205556680U, No. 2016.09.07 discloses an anaerobic reactor for treating kitchen waste, which comprises a hydraulic stirring device, a methane stirring device and a side-entry mechanical stirring device. Through configuring 3 kinds of stirring facilities, can realize the quick intensive mixing of feeding, reduce feeding load and temperature impact, avoid the reactor acidizing to reduce reactor bottom deposit and reaction dead angle, improve reaction efficiency, shorten reaction time. The 3 kinds of stirring facilities are independent in structure, do not influence each other, and can be opened alone or run simultaneously. The utility model discloses a technical scheme provides the novel structure of richening and optimizing its agitating unit to the agitating unit of the anaerobic reactor that is used for kitchen garbage to handle. The anaerobic reactor has the defects that the vertical material and temperature distribution of the anaerobic reactor are uneven and the top scum is covered in the actual kitchen waste treatment process of the anaerobic reactor. Firstly, kitchen slurry (another name of kitchen waste, the same substance is referred to in the invention) is high-concentration high-inherent organic waste liquid, so that the materials are easily mixed unevenly and the temperature is easily distributed unevenly in the vertical direction of the anaerobic reactor; secondly, although the deposition and reaction dead angles at the bottom of the reactor are reduced by hydraulic stirring and side stirring, the phenomena of floating slag capping and floating oil accumulation at the top of the reactor are ignored; and thirdly, the biogas stirring device is utilized to enhance the stirring efficiency, and simultaneously, the biogas can indirectly carry a large amount of water vapor, so that the difficulty of later-stage biogas dehydration resource utilization is increased. In addition, the technical scheme adopts direct water outlet from the top, which easily causes the phenomena of top scum discharge, uneven discharging, pipeline blockage, top overflow and the like.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems that vertical materials and temperature are not uniformly distributed and top scum is covered in the practical implementation process of the anaerobic reactor for treating kitchen waste disclosed in the prior art, and the problems that top scum is discharged, discharged materials are not uniform, a pipeline is blocked and top overflow is easily caused by adopting a top direct water outlet process, the invention aims to provide the methane-producing anaerobic reactor for treating kitchen slurry and the methane-producing process.

2. Technical scheme

In order to achieve the purpose, the invention adopts the following technical scheme:

a biogas production anaerobic reactor for treating kitchen slurry comprises a reactor tank body, a biogas collection system and a silt collection system, wherein the biogas collection system and the silt collection system are arranged on the reactor tank body; the reactor is characterized in that a first circulating heat exchange system and a second circulating heat exchange system are also arranged on the reactor tank body; the first circulating heat exchange system comprises a discharging system, a heat exchange system and a feeding system, the discharging system comprises a blanking barrel, one end of the blanking barrel is connected with the top of the reactor tank body, and the other end of the blanking barrel is sequentially connected with the heat exchange system and the feeding system; the second circulating heat exchange system comprises a middle-upper discharging pipeline, a tank top spraying feeding pipeline and a tank bottom annular feeding pipeline, wherein the middle-upper discharging pipeline is connected with the middle upper part of the reactor tank body, the tank top spraying feeding pipeline and the tank bottom annular feeding pipeline are connected in parallel on the middle-upper discharging pipeline, the tank top spraying feeding pipeline is connected with the top of the tank body, and the tank bottom annular feeding pipeline is connected with the bottom of the tank body; the arrangement of the first circulating heat exchange system and the second circulating heat exchange system ensures that the methane-generating anaerobic reactor has the functions of scale prevention, impact resistance, water volume resistance and temperature change resistance, and is stable in operation; the tank top sprays the mode that the feed line setting was used to spray upper portion circulating liquid at tank body top and eliminates the foam that the internal top of jar produced, and the circulation of material is quickened, plays vertical material and temperature distribution and breaks the effect that top dross covers.

Furthermore, the feeding system comprises a material distribution pipeline arranged inside the reactor tank body, and the kitchen pretreatment slurry is connected with the material distribution pipeline through a pipeline; the discharging system also comprises a discharging collecting pipe and an overflow discharging pipe; the discharging collecting pipe is arranged in the reactor tank body, a plurality of branch pipes with upward openings are arranged on the discharging collecting pipe, the branch pipes are uniformly distributed on the radial section of the reactor tank body, the openings of the branch pipes are arranged below liquid in the reactor tank body, so that scum is prevented from entering the discharging collecting pipe, one end of the discharging collecting pipe is connected with the middle part of the blanking barrel, and the liquid in the reactor tank body passes through the openings of the branch pipes and enters the discharging collecting pipe, so that the liquid enters the blanking barrel; the overflow discharging pipe is arranged at the upper part of the blanking barrel, and liquid in the reactor tank is discharged when the height of the liquid in the blanking barrel is higher than that of the overflow discharging pipe; the blanking pipe is arranged at the bottom of the blanking barrel, the blanking pipe, the first circulating pump, the heat exchange system and the distribution pipeline are sequentially connected, liquid in the reactor tank body exchanges heat in the heat exchange system, and the liquid after heat exchange and the kitchen pretreatment slurry are mixed in the distribution pipeline and then uniformly enter the reactor tank body.

Furthermore, the heat exchange system comprises a heat exchanger, a thermometer connected with the heat exchanger, a heat source and/or a cold source, the heat source is connected during temperature rising, the cold source is connected during temperature lowering, heat exchange and temperature regulation are carried out on liquid outside the reactor tank body, and the liquid circulates to the bottom of the reactor tank body from the material distribution pipeline, so that the balanced regulation and control of the temperature of the anaerobic system are realized.

Furthermore, pipe wall heat preservation is arranged outside the heat exchanger, the heat source and/or the cold source, and heat loss can be reduced and energy consumption can be reduced due to the pipe wall heat preservation.

Furthermore, the heat source is steam, the steam conveying carrier is a steam pipe, the heat exchanger is connected with the steam pipe, and the steam pipe is provided with a steam regulating valve; when the temperature of the connecting steam is increased, the connecting steam is linked with a steam regulating valve through a thermometer, the using amount of the steam is regulated on line in real time, the liquid is subjected to heat exchange and temperature regulation outside the reactor tank body, and the liquid uniformly enters the reactor tank body through a distribution pipeline after the temperature regulation is finished.

Furthermore, the steam is saturated steam, the carrier for conveying the saturated steam is a steam pipe, the heat exchanger is connected with the steam pipe, and the steam pipe is provided with a steam regulating valve; when the temperature of the connected saturated steam is increased, the temperature is linked with a steam regulating valve through a thermometer, the consumption of the saturated steam is regulated on line in real time, the liquid is subjected to heat exchange and temperature regulation outside the reactor tank, and the liquid uniformly enters the reactor tank through a distribution pipeline after the temperature regulation is finished. The various kinds of steam are classified into saturated steam and superheated steam according to pressure and temperature, and the technical solution of the present invention preferably uses saturated steam.

Furthermore, the cold source is cooling water, the conveying carrier of the cooling water is a cooling water pipe, and the heat exchanger is connected with the cooling water pipe; when the reactor is connected with cooling water for cooling, the heat exchange state is monitored on line in real time through a thermometer, liquid is subjected to heat exchange and temperature regulation outside the reactor tank, and the liquid uniformly enters the reactor tank through a distribution pipeline after the temperature regulation is finished.

Furthermore, a second circulating pump is arranged on the discharge pipe at the middle upper part, the outlet of the second circulating pump is provided with two branches, one branch is connected with a tank top spraying feeding pipeline, the other branch is connected with a tank bottom annular feeding pipeline, the tank top spraying feeding pipeline is uniformly provided with a plurality of spraying branch pipes on the top of the reactor tank body, and the plurality of spraying branch pipes extend into the reactor tank body; the tank bottom annular feeding pipeline surrounds the bottom of the reactor tank body and is connected with the tank body through a plurality of feeding branch pipes; the middle-upper discharging pipeline discharges materials at the middle-upper part of the reactor tank body, and the materials are pressurized by the second circulating pump and then pumped into the annular feeding pipeline at the bottom of the tank or the spraying feeding pipeline at the top of the reactor tank body so as to enter the bottom or the top of the reactor tank body.

Furthermore, a plurality of side wall stirrers are obliquely arranged on the side wall of the reactor tank body in the same direction, and rotational flow stirring is formed when the plurality of side wall stirrers obliquely arranged in the same direction run, so that the contact efficiency of microorganisms and substrates is enhanced, and the acidification of the anaerobic reactor is avoided.

Furthermore, the biogas collection system is arranged at the top of the reactor tank body and comprises a cyclone separator, a biogas collection pipe connected with the cyclone separator and the reactor tank body, a dehydration backflow pipe connected with the lower part of the cyclone separator and a gas pipe connected with the cyclone separator; the biogas enters the cyclone separator through the biogas collecting pipe at the top of the reactor tank body, is pretreated in the cyclone separator to reduce the water content and then enters the subsequent treatment unit through the gas conveying pipe.

Furthermore, an emptying pipeline is arranged at the top of the reactor tank body and is used for emptying methane in the reactor tank body and emptying methane during maintenance in the reactor tank body.

Furthermore, the silt collecting system comprises an inverted cone-shaped bottom plate, a silt discharge pipeline and a silt discharge pump, wherein the upper surface of the inverted cone-shaped bottom plate is inverted cone-shaped, the inverted cone-shaped bottom plate is arranged at the bottom of the reactor tank body and is positioned below the material distribution pipeline, one end of the silt discharge pipeline is arranged at the upper part of the inverted cone-shaped bottom plate, and the other end of the silt discharge pipeline is arranged outside the reactor tank body and is connected with the silt discharge pump; according to the technical scheme, the inverted-cone-shaped bottom plate is adopted to strengthen the functions of a sand and gravel discharging and feeding system of the sand and mud collecting system, wherein the sand and gravel are carried by the discharging and feeding system, and the sand and gravel are generated by reaction.

Furthermore, a sand discharge flushing port is formed in the sand discharge pipeline, so that the problem of unsmooth sand discharge caused by blockage of the sand discharge pipeline is avoided.

Furthermore, anaerobic reactor still sets up multiple sampling pipeline, multiple sampling pipeline is including setting up at the sampling opening of the external portion of reactor jar, vertical setting at the internal portion of reactor jar and the sampling pipe of being connected with the sampling opening, the sampling pipe sets up a plurality of sampling opening in vertical direction, sets for not co-altitude according to the demand and samples, and the sample of sample is used for material analysis chemical examination to monitor the internal vertical thick liquids digestion situation of reactor jar, in time discover the problem.

Furthermore, the sampling opening sets up 3 ~ 5, sets for not co-altitude according to the demand and samples, and the sample of sample is used for material analysis chemical examination to monitor the vertical thick liquids digestion situation of the internal portion of reactor jar, in time discover the problem.

Furthermore, the volume of the reactor tank body is 2000-7500m³The height-diameter ratio H to D is 5: 12-5: 6, and the material is glass steel or steel; the reactor tank body is vertically arranged, the base is fixed through a nut, the outer wall is fixed through a waist hoop, and the top is sealed through a stainless steel sealing cover and a nut; the volume of the rotary foam separator is 35L-50m³The material is glass steel or steel; the volume of the blanking barrel is 15L-30m³The material is glass steel or steel.

Furthermore, the outer wall of the reactor tank body is provided with a rock wool and color steel plate heat-insulating layer, so that heat loss is reduced, and energy consumption of the system is reduced.

Furthermore, a thermometer, a liquid level meter, a standby interface, a manhole on the top side wall and a steel platform disc ladder guardrail for daily maintenance and inspection are also arranged on the reactor tank body; a valve at the joint of the reactor tank body adopts a knife gate valve; the manhole on the side wall of the top part is convenient for the maintenance of the reactor tank body.

A process for generating biogas by an anaerobic reactor for treating kitchen slurry is characterized in that the kitchen slurry in a reactor tank body is subjected to first circulating heat exchange and second circulating heat exchange;

the first circulation heat exchange comprises the steps of carrying out temperature regulation and heat exchange on part of liquid discharged from the top in the reactor tank body, and mixing the liquid subjected to heat exchange with the kitchen pretreatment slurry and then feeding the mixture into the bottom of the reactor tank body;

and the second circulation heat exchange comprises discharging from the middle upper part of the reactor tank body, and performing tank top spraying feeding or tank bottom annular feeding on the discharging from the middle upper part of the reactor tank body. The first circulation heat exchange process and the second circulation heat exchange process enable the methane-producing anaerobic reactor to have the functions of scale prevention, impact resistance, water volume resistance and temperature change resistance, and the operation is stable.

Furthermore, the step of adjusting the temperature and exchanging the heat of the liquid discharged from the top in the reactor tank body comprises heating or cooling, a heat source is connected during heating, a cold source is connected during cooling, the liquid is subjected to heat exchange and temperature adjustment outside the reactor tank body, and the liquid after heat exchange is mixed with the kitchen pretreatment slurry and then enters the bottom of the reactor tank body.

Furthermore, first circulation heat transfer uses first circulation heat transfer system, first circulation heat transfer system includes discharge system, heat transfer system and charge-in system, discharge system includes the blanking bucket, reactor jar body top is connected to blanking bucket one end, and the other end connects gradually with heat transfer system, charge-in system.

Furthermore, the steam is saturated steam, the carrier for conveying the saturated steam is a steam pipe, the heat exchanger is connected with the steam pipe, and the steam pipe is provided with a steam regulating valve; when the temperature of the connected saturated steam is increased, the temperature is linked with a steam regulating valve through a thermometer, the consumption of the saturated steam is regulated on line in real time, the liquid is subjected to heat exchange and temperature regulation outside the reactor tank, and the liquid uniformly enters the reactor tank through a distribution pipeline after the temperature regulation is finished.

Furthermore, the second circulation heat exchange uses a second circulation heat exchange system, the second circulation heat exchange system comprises a middle-upper discharge pipeline, a tank top spraying feed pipeline and a tank bottom annular feed pipeline, the middle-upper discharge pipeline is connected with the middle upper part of the reactor tank body, and the tank top spraying feed pipeline and the tank bottom annular feed pipeline are connected in parallel on the middle-upper discharge pipeline.

Furthermore, the process for generating the biogas by the anaerobic reactor for treating the kitchen slurry further comprises a biogas collection process, wherein a biogas collection system is used in the biogas collection process, the biogas collection system is arranged at the top of the reactor tank body, and the biogas collection system comprises a cyclone separator, a biogas collection pipe connected with the cyclone separator and the reactor tank body, a dehydration backflow pipe connected with the lower part of the cyclone separator, and a gas pipe connected with the cyclone separator; the biogas enters the cyclone separator through the biogas collecting pipe at the top of the reactor tank body, is pretreated in the cyclone separator to reduce the water content and then enters the subsequent treatment unit through the gas conveying pipe.

Furthermore, the process for generating the biogas by the anaerobic reactor for treating the kitchen slurry also comprises a sand-mud collecting and sand-discharging process; the silt collecting process uses a silt collecting system; the silt collecting system comprises an inverted cone-shaped bottom plate, a silt discharge pipeline and a silt discharge pump, wherein the upper surface of the inverted cone-shaped bottom plate is inverted cone-shaped, the inverted cone-shaped bottom plate is arranged at the bottom of the reactor tank body, one end of the silt discharge pipeline is arranged at the upper part of the inverted cone-shaped bottom plate, and the other end of the silt discharge pipeline is arranged outside the reactor tank body and is connected with the silt discharge pump; according to the technical scheme, the inverted-cone-shaped bottom plate is adopted to strengthen the functions of a sand and gravel discharging and feeding system of the sand and mud collecting system, wherein the sand and gravel are carried by the discharging and feeding system, and the sand and gravel are generated by reaction.

Furthermore, the sediment collecting process further comprises a sand discharge pipeline flushing process, wherein the sand discharge pipeline flushing process is carried out through a sand discharge flushing port arranged on the sand discharge pipeline, and the problem of unsmooth sand discharge caused by blockage of the sand discharge pipeline is avoided.

Furthermore, the process for generating the biogas by the anaerobic reactor for treating the kitchen slurry further comprises a kitchen slurry stirring process, wherein the kitchen slurry stirring process is carried out by using a plurality of side wall stirrers, the side wall stirrers are arranged on the side wall of the reactor tank body in a same-direction oblique cutting manner, and a rotational flow stirring is formed when the plurality of side wall stirrers arranged in the same-direction oblique cutting manner run, so that the contact efficiency of microorganisms and a substrate is enhanced, and the acidification of the anaerobic reactor is avoided.

Furthermore, handle anaerobic reactor biogas production technology of meal kitchen thick liquids still includes sampling technology, sampling technology uses multiple sampling pipeline, multiple sampling pipeline is including setting up at the sampling opening of the external portion of reactor jar, vertical setting at the internal portion of reactor jar and the sampling pipe of being connected with the sampling opening, the sampling pipe sets up a plurality of sampling opening in vertical direction, sets for not co-altitude according to the demand and samples, and the sample of sample is used for material analysis chemical examination to monitor the internal vertical thick liquids digestion situation of reactor jar, in time discover the problem.

Furthermore, the process for generating the biogas by the anaerobic reactor for treating the kitchen slurry further comprises a heat preservation process, wherein the heat preservation process comprises heat preservation of the outer wall of the reactor tank body, heat preservation of the first circulating heat exchange system and heat preservation of the second circulating heat exchange system, so that heat loss is reduced, and energy consumption of the system is reduced.

Furthermore, the heat preservation of the outer wall of the reactor tank body is realized by arranging a rock wool and color steel plate heat preservation layer on the outer wall of the reactor tank body.

Furthermore, the volume of the reactor tank body used in the process of generating the biogas by the anaerobic reactor for treating the kitchen slurry is 2000-7500m³The height-diameter ratio H to D is 5: 12-5: 6, and the material is glass steel or steel; the reactor tank body is vertically arranged, the base is fixed through a nut, the outer wall is fixed through a waist hoop, and the top is sealed through a stainless steel sealing cover and a nut.

Furthermore, the volume of the cyclone foam separator is 35L-50m³The material is glass steel or steel.

Furthermore, the volume of the blanking barrel is 15L-30m³The material is glass steel or steel.

3. Advantageous effects

Compared with the prior art, the invention has the following beneficial effects:

1) the first circulating heat exchange system and the second circulating heat exchange system are arranged to perform first circulating heat exchange and second circulating heat exchange on the kitchen slurry in the reactor tank body; the first circulation heat exchange comprises the steps of carrying out temperature regulation and heat exchange on part of liquid discharged from the top in the reactor tank body, mixing the liquid subjected to heat exchange with the kitchen pretreatment slurry, and then feeding the mixture into the bottom of the reactor tank body; the second circulation heat exchange comprises discharging from the middle upper part of the reactor tank body, and performing tank top spraying feeding or tank bottom annular feeding on the discharging from the middle upper part of the reactor tank body. The first circulation heat exchange process and the second circulation heat exchange process enable the methane-producing anaerobic reactor to have the functions of scale prevention, impact resistance, water volume resistance and temperature change resistance, and the operation is stable.

2) The discharging system comprises a discharging collecting pipe, a blanking barrel and an overflow discharging pipe; the discharging collecting pipe is arranged in the reactor tank body, a plurality of branch pipes with upward openings are arranged on the discharging collecting pipe, the branch pipes are uniformly distributed on the radial cross section of the reactor tank body, the openings of the branch pipes are arranged below liquid in the reactor tank body, the liquid enters the discharging collecting pipe and then enters the blanking barrel in an overflow mode, the liquid level difference is utilized, the water outlet is guaranteed to be even slurry at the middle upper part, scum overflow is avoided, and the discharging is balanced.

3) The heat exchange system comprises a heat exchanger, a thermometer connected with the heat exchanger, a heat source and/or a cold source, wherein the heat source is connected during heating, the cold source is connected during cooling, heat exchange and temperature regulation are carried out on liquid outside a reactor tank body, and the liquid is circulated to the bottom of the reactor tank body from a distribution pipeline, so that the balanced regulation and control of the temperature of the anaerobic system are realized; after the liquid subjected to heat exchange and the kitchen pretreatment slurry are mixed in the distribution pipeline, the mixture uniformly enters the reactor tank body, and the temperature of the reactor tank body is ensured to be within a controllable fluctuation range.

4) The tank top spraying and feeding pipeline is arranged at the top of the tank body, and eliminates foam generated at the top in the tank body by spraying liquid circulated at the middle upper part, so that the circulation of materials is accelerated, and the functions of adjusting vertical materials and temperature distribution and breaking scum at the top are achieved.

5) The annular feeding pipeline at the bottom of the tank is encircled at the bottom of the tank body of the reactor and is connected with the tank body through a plurality of feeding branch pipes; the middle-upper discharge pipeline discharges materials at the middle-upper part of the reactor tank body, and pumps the materials into the annular feeding pipeline at the bottom of the tank or the spraying feeding pipeline at the top of the reactor tank body after being pressurized by the second circulating pump so as to enter the bottom or the top of the reactor tank body; because the bottom of the tank body is provided with the uniformly distributed material distribution pipeline and the sand discharge pipeline, the annular feeding pipeline at the bottom of the tank is directly connected with the bottom of the tank body, the increase of pipelines at the bottom of the tank body is avoided, and meanwhile, the pump force of the second circulating pump is utilized to impact the slurry near the wall surface of the tank body, so that the material circulation effect is increased.

6) The annular feeding pipeline at the bottom of the tank is directly connected with the bottom of the tank body, so that the strong corrosion of the bottom of the tank body is avoided, and the service life of equipment is prolonged.

7) The inverted-cone-shaped bottom plate is adopted to reinforce the functions of the silt collecting system in discharging gravel carried by the discharging and feeding system and reacting to generate silt, and the arranged silt discharging flushing port avoids the problem of unsmooth silt discharging caused by blockage of the silt discharging pipeline.

8) The invention is provided with multiple sampling pipelines, different heights are set according to requirements for sampling, and the sampled samples are used for material analysis and chemical examination, so that the digestion condition of vertical slurry in the reactor tank body can be monitored, and problems can be found in time.

9) According to the invention, the rock wool and the color steel plate heat-insulating layer are arranged on the outer wall of the reactor tank body, so that heat loss is reduced, and energy consumption of a system is reduced.

10) The reactor tank body is also provided with a thermometer, a liquid level meter, a standby interface, a manhole on the top side wall and a steel platform disc ladder guardrail for daily maintenance and inspection; a valve at the joint of the reactor tank body adopts a knife gate valve; the manhole on the side wall of the top part is convenient for the maintenance of the reactor tank body.

11) The present invention providesThe technical scheme is suitable for the capacity of 2000-7500m³The methane-generating anaerobic reactor for treating the kitchen slurry has a height-diameter ratio H to D of 5: 12-5: 6, and the first and second circulating heat exchange systems can treat raw materials with high suspended solid content (TS 6-15%) so that all the pretreated kitchen waste is subjected to methane digestion treatment; the reactor has the advantages that the heat exchange is carried out in a circulating manner outside the tank body, the heat exchange efficiency is high, the energy consumption is saved, and the sludge is prevented from being dead due to the too fast local temperature rise; the reactor has impact load resistance, when impact load occurs in feeding, the composition change in the reactor tank body is small, and the suddenly increased load can be shared by the whole tank of mixed liquor; materials in the reactor tank body are uniformly distributed, so that layering is avoided, and the contact chance of the substrate and microorganisms is increased; the inhibiting substances entering the reactor tank can be rapidly dispersed, and the low concentration level is kept; the discharging is optimized, and the second circulating heat exchange system is utilized to adopt top-filling spraying, so that the phenomena of scum, crusting, blockage, unsmooth gas overflow and short flow are effectively avoided; has higher organic matter degradation rate, and the methane yield per ton of the complete residue materials of the kitchen can reach 80Nm³(ii) a The side wall stirrer is combined with the silt collecting system, and therefore silt discharging efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is a schematic front view of a first cycle heat exchange system of the present invention.

FIG. 3 is a schematic top view of a first cycle heat exchange system of the present invention.

FIG. 4 is a schematic top view of a second cycle heat exchange system of the present invention.

FIG. 5 is a schematic partial elevational view of a second cycle heat exchange system of the present invention.

FIG. 6 is a schematic view showing the connection of the tank top spray feed pipe and the tank top of the second circulation heat exchange system of the present invention.

Fig. 7 is a schematic distribution diagram of the distributing pipeline and the sand discharging pipeline of the invention.

In the figure: 1-reactor tank 2-blanking pipe 3-middle upper discharge pipeline 4-tank top spray feed pipeline 5-tank bottom annular feed pipeline 6-material distribution pipeline 7-kitchen pretreatment slurry 8-discharge collection pipe 9-blanking barrel 10-overflow discharge pipe 11-branch pipe 12-first circulating pump 13-heat exchanger 14-steam pipe 15-thermometer 17-side wall stirrer 18-foam separator 19-methane collection pipe 20-dehydration reflux pipe 21-gas pipe 22-evacuation pipe 23-inverted cone bottom plate 24-sand discharge pipeline 25-sand discharge pump 26-sand discharge flushing port 27-sampling port 28-sampling pipe 29-sampling port 30-liquid level meter 31-rock wool and color steel plate heat insulation layer 32-second Circulation pump 33-top 34-cooling water pipe 35-shower manifold.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be noted that the kitchen slurry is another name of kitchen waste well known to those skilled in the art, and refers to the same substance.

The anaerobic reactor related by the invention is a biogas-generating anaerobic reactor for treating materials with particularly high solid content and organic matters after the kitchen waste is crushed.

Example 1

As shown in fig. 1 to 7, a biogas-producing anaerobic reactor for treating kitchen slurry comprises a reactor tank body 1, and a biogas collecting system and a silt collecting system which are arranged on the reactor tank body 1; the reactor is characterized in that a first circulating heat exchange system and a second circulating heat exchange system are also arranged on the reactor tank body 1; the first circulating heat exchange system comprises a discharging system, a heat exchange system and a feeding system, the discharging system comprises a blanking barrel 9, one end of the blanking barrel 9 is connected with the top 33 of the reactor tank body 1, and the other end of the blanking barrel 9 is sequentially connected with the heat exchange system and the feeding system; the second circulating heat exchange system comprises a middle upper part discharging pipeline 3, a tank top spraying feeding pipeline 4 and a tank bottom annular feeding pipeline 5, wherein the middle upper part discharging pipeline 3 is connected with the middle upper part of the reactor tank body 1, the tank top spraying feeding pipeline 4 and the tank bottom annular feeding pipeline 5 are connected in parallel on the middle upper part discharging pipeline 3, the tank top spraying feeding pipeline 4 is connected with the top part 33 of the tank body, and the tank bottom annular feeding pipeline 5 is connected with the bottom part of the tank body; the arrangement of the first circulating heat exchange system and the second circulating heat exchange system ensures that the methane-generating anaerobic reactor has the functions of scale prevention, impact resistance, water volume resistance and temperature change resistance, and is stable in operation; the tank top spraying and feeding pipeline 4 is arranged at the top 33 of the tank body, can use the liquid circulated at the middle upper part to spray the foam generated at the top of the tank body of the reactor, achieves the purpose of eliminating the foam, and accelerates the circulation of the materials to play the roles of adjusting the vertical materials and the temperature distribution and breaking the scum at the top 33 to form a cover.

The feeding system comprises a material distribution pipeline 6 arranged inside the reactor tank body 1, and the kitchen pretreatment slurry 7 is connected with the material distribution pipeline 6 through a pipeline; the discharging system also comprises a discharging collecting pipe 8 and an overflow discharging pipe 10; the discharging collecting pipe 8 is arranged inside the reactor tank body 1, the discharging collecting pipe 8 is provided with a plurality of branch pipes 11 with upward openings, the branch pipes 11 are uniformly distributed on the radial section of the reactor tank body 1, the openings of the branch pipes 11 are arranged below the liquid in the reactor tank body 1 to prevent scum from entering the discharging collecting pipe 8, one end of the discharging collecting pipe 8 is connected with the middle part of the blanking barrel 9, and the liquid in the reactor tank body 1 enters the discharging collecting pipe 8 after passing through the openings of the branch pipes 11, so as to enter the blanking barrel 9; the overflow discharging pipe 10 is arranged at the upper part of the blanking barrel 9, and liquid in the reactor tank body 1 is discharged when the height of the liquid in the blanking barrel 9 is higher than the overflow discharging pipe 10; the blanking pipe 2 is arranged at the bottom of the blanking barrel 9, the blanking pipe 2, the first circulating pump 12, the heat exchange system and the distribution pipeline 6 are sequentially connected, liquid in the reactor tank body 1 exchanges heat in the heat exchange system, and the liquid after heat exchange and the kitchen pretreatment slurry 7 are mixed in the distribution pipeline 6 and then uniformly enter the reactor tank body 1.

The heat exchange system comprises a heat exchanger 13, a thermometer 15 connected with the heat exchanger 13, and a heat source and/or a cold source, the heat source is connected during heating, the cold source is connected during cooling, heat exchange and temperature regulation are carried out on liquid outside the reactor tank body 1, and the liquid circulates to the bottom of the reactor tank body 1 from the distribution pipeline 6, so that the balanced regulation and control of the temperature of the anaerobic system are realized.

And pipe walls are arranged outside the heat exchanger 13 and the heat source and/or the cold source for heat preservation, so that heat loss can be reduced and energy consumption can be reduced.

The heat source is steam, the conveying carrier of the steam is a steam pipe 14, the heat exchanger 13 is connected with the steam pipe 14, and the steam pipe 14 is provided with a steam regulating valve; when the temperature of the connecting steam is increased, the connecting steam is linked with a steam regulating valve through a thermometer 15, the using amount of the steam is regulated on line in real time, the liquid is subjected to heat exchange and temperature regulation outside the reactor tank body 1, and the liquid uniformly enters the reactor tank body 1 through a material distribution pipeline 6 after the temperature regulation is finished.

The steam is saturated steam, the conveying carrier of the saturated steam is a steam pipe 14, the heat exchanger 13 is connected with the steam pipe 14, and the steam pipe 14 is provided with a steam regulating valve; when the temperature of the connected saturated steam is increased, the temperature meter 15 is linked with a steam regulating valve, the consumption of the saturated steam is regulated on line in real time, the liquid is subjected to heat exchange and temperature regulation outside the reactor tank body 1, and the liquid uniformly enters the reactor tank body 1 through the material distribution pipeline 6 after the temperature regulation is finished. The various kinds of steam are classified into saturated steam and superheated steam according to pressure and temperature, and the technical solution of the present invention preferably uses saturated steam.

The cold source is cooling water, the conveying carrier of the cooling water is a cooling water pipe 34, and the heat exchanger 13 is connected with the cooling water pipe 34; when the reactor is connected with cooling water for cooling, the temperature of the cooling water is monitored on line in real time through the thermometer 15, liquid is subjected to heat exchange and temperature regulation outside the reactor tank body 1, and the liquid uniformly enters the reactor tank body 1 through the material distribution pipeline 6 after the temperature regulation is finished.

A second circulating pump 32 is arranged on the middle upper part discharging pipeline 3, an outlet of the second circulating pump 32 is provided with two branches, one branch is connected with a tank top spraying feeding pipeline 4, the other branch is connected with a tank bottom annular feeding pipeline 5, the tank top spraying feeding pipeline 4 is uniformly provided with a plurality of spraying branch pipes 35 on the top 33 of the reactor tank body 1, and the plurality of spraying branch pipes 35 extend into the reactor tank body 1; the annular feeding pipeline 5 at the bottom of the tank is surrounded at the bottom of the reactor tank body 1 and is connected with the tank body through a plurality of feeding branch pipes 11; the middle-upper discharge pipeline 3 discharges at the middle-upper part of the reactor tank body 1, and pumps the material into the tank bottom annular feed pipeline 5 or the tank top spraying feed pipeline 4 of the reactor tank body 1 after being pressurized by the second circulating pump 32 so as to enter the bottom or the top 33 of the reactor tank body 1.

The side wall of the reactor tank body 1 is provided with a plurality of side wall stirrers 17 which are obliquely arranged in the same direction, and the side wall stirrers 17 which are obliquely arranged in the same direction form rotational flow stirring during operation, so that the contact efficiency of microorganisms and substrates is enhanced, and the acidification of the anaerobic reactor is avoided.

The biogas collecting system is arranged at the top 33 of the reactor tank body 1 and comprises a cyclone separator 18, a biogas collecting pipe 19 connected with the cyclone separator 18 and the reactor tank body 1, a dehydration backflow pipe connected with the lower part of the cyclone separator 18 and a gas pipe 21 connected with the cyclone separator 18; the biogas enters the cyclone separator 18 through the biogas collecting pipe 19 at the top 33 of the reactor tank 1, is pretreated in the cyclone separator 18 to reduce the water content and then enters the subsequent processing unit through the gas transmission pipe 21.

The top 33 of the reactor tank 1 is provided with an emptying pipe 22, and the emptying pipe 22 is used for emptying methane in the reactor tank 1 and overhauling and emptying in the tank.

The silt collecting system comprises an inverted cone-shaped bottom plate 23, a silt discharge pipeline 24 and a silt discharge pump 25, wherein the upper surface of the inverted cone-shaped bottom plate 23 is inverted cone-shaped, the inverted cone-shaped bottom plate 23 is arranged at the bottom of the reactor tank body 1 and is positioned below the material distribution pipeline 6, one end of the silt discharge pipeline 24 is arranged at the upper part of the inverted cone-shaped bottom plate 23, and the other end of the silt discharge pipeline 24 is arranged outside the reactor tank body 1 and is connected with the silt discharge pump 25; the technical scheme of the invention adopts the inverted cone-shaped bottom plate 23 to strengthen the functions of the silt collecting system in discharging the sand carried by the feeding system and generating silt through reaction.

The sand discharge pipeline 24 is provided with a sand discharge flushing port 26, so that the problem of unsmooth sand discharge caused by blockage of the sand discharge pipeline 24 is avoided.

Anaerobic reactor still sets up multiple sampling pipeline, multiple sampling pipeline is including setting up at the reactor jar external sample connection 27 of body, vertical setting is at the reactor jar internal portion and the sampling pipe 28 of being connected with sample connection 27, sampling pipe 28 sets up a plurality of sample connection 29 in vertical direction, set for not co-altitude according to the demand and sample, the sample of sample is used for material analysis chemical examination, so that monitor reactor jar internal portion vertical thick liquids digestion situation, in time the discovery problem.

Sampling port 29 sets up 3 ~ 5, sets for not co-altitude according to the demand and samples, and the sample of sample is used for material analysis chemical examination to monitor the inside vertical thick liquids digestion situation of reactor jar body 1, in time discover the problem.

The volume of the reactor tank 1 is 2000-7500m³The height-diameter ratio H to D is 5: 12-5: 6, and the material is glass steel or steel; the reactor tank body 1 is vertically arranged, the base is fixed through a nut, the outer wall is fixed through a waist hoop, and the top 33 is sealed through a stainless steel sealing cover and a nut; the volume of the rotary foam separator 18 is 35L-50m³The material is glass steel or steel; the volume of the blanking barrel 9 is 15L-30m³The material is glass steel or steel.

The outer wall of the reactor tank body 1 is provided with a rock wool and color steel plate heat-insulating layer 31, so that heat loss is reduced, and energy consumption of the system is reduced.

The reactor tank body 1 is also provided with a thermometer 15, a liquid level meter 30, a standby interface, a manhole on the side wall of the top part 33 and a steel platform disc ladder guardrail for daily maintenance and inspection; a valve at the joint of the reactor tank body 1 adopts a knife gate valve; the manhole of the side wall of the top part 33 is convenient for the overhaul and maintenance of the reactor tank body 1.

According to the anaerobic reactor for generating biogas for treating the kitchen slurry provided by the embodiment 1, in order to facilitate understanding of the technical personnel in the field, the anaerobic reactor for treating the kitchen slurry is provided with a biogas generating process, and the anaerobic reactor is characterized in that the kitchen slurry in a reactor tank body 1 is subjected to first circulating heat exchange and second circulating heat exchange;

the first circulation heat exchange comprises the steps of carrying out temperature regulation and heat exchange on part of liquid discharged from the top 33 in the reactor tank body 1, mixing the liquid subjected to heat exchange with the kitchen pretreatment slurry 7, and then feeding the mixture into the bottom of the reactor tank body 1;

the second circulation heat exchange comprises discharging from the middle upper part of the reactor tank body 1, and performing tank top spraying feeding or tank bottom annular feeding on the discharging from the middle upper part of the reactor tank body. The first circulation heat exchange process and the second circulation heat exchange process enable the methane-producing anaerobic reactor to have the functions of scale prevention, impact resistance, water volume resistance and temperature change resistance, and the operation is stable.

The step of adjusting the temperature and exchanging the heat of the liquid discharged from the top 33 in the reactor tank body 1 comprises heating or cooling, a heat source is connected during heating, a cold source is connected during cooling, the liquid is subjected to heat exchange and temperature adjustment outside the reactor tank body 1, and the liquid after heat exchange is mixed with the kitchen pretreatment slurry 7 and then enters the bottom of the reactor tank body 1.

First circulation heat transfer uses first circulation heat transfer system, and first circulation heat transfer system includes discharge system, heat transfer system and charge-in system, and discharge system includes blanking

bucket

9, and 1 top 33 of the reactor jar body is connected to 9 one end of blanking bucket, and the other end connects gradually with heat transfer system, charge-in system.

The steam is saturated steam, the conveying carrier of the saturated steam is a steam pipe 14, the heat exchanger 13 is connected with the steam pipe 14, and the steam pipe 14 is provided with a steam regulating valve; when the temperature of the connected saturated steam is increased, the temperature meter 15 is linked with a steam regulating valve, the consumption of the saturated steam is regulated on line in real time, the liquid is subjected to heat exchange and temperature regulation outside the reactor tank body 1, and the liquid uniformly enters the reactor tank body 1 through the material distribution pipeline 6 after the temperature regulation is finished.

The second circulation heat transfer uses second circulation heat transfer system, and second circulation heat transfer system sprays charge-in pipeline 4, tank bottoms annular feed line 5 including well upper portion discharge pipeline 3, the tank deck of connecting reactor jar body 1, the well upper portion discharge pipeline 3 of connecting reactor jar body 1, and the tank deck sprays charge-in pipeline 4 and tank bottoms annular feed line 5 parallel connection on well upper portion discharge pipeline 3.

The process for producing the biogas by the anaerobic reactor for treating the kitchen slurry further comprises a biogas collection process, wherein a biogas collection system is used in the biogas collection process and is arranged at the top 33 of the reactor tank body 1, and the biogas collection system comprises a cyclone separator 18, a biogas collection pipe 19 connected with the cyclone separator 18 and the reactor tank body 1, a dehydration backflow pipe connected with the lower part of the cyclone separator 18 and a gas pipe 21 connected with the cyclone separator 18; the biogas enters the cyclone separator 18 through the biogas collecting pipe 19 at the top 33 of the reactor tank 1, is pretreated in the cyclone separator 18 to reduce the water content and then enters the subsequent processing unit through the gas transmission pipe 21.

The anaerobic reactor biogas production process for treating the kitchen slurry also comprises a silt and sand collecting and discharging process; the silt collection process uses a silt collection system; the silt collecting system comprises an inverted cone-shaped bottom plate 23, a silt discharge pipeline 24 and a silt discharge pump 25, wherein the upper surface of the inverted cone-shaped bottom plate 23 is inverted cone-shaped, the inverted cone-shaped bottom plate 23 is arranged at the bottom of the reactor tank body 1, one end of the silt discharge pipeline 24 is arranged at the upper part of the inverted cone-shaped bottom plate 23, and the other end of the silt discharge pipeline 24 is arranged outside the reactor tank body 1 and is connected with the silt discharge pump 25; the technical scheme of the invention adopts the inverted cone-shaped bottom plate 23 to strengthen the functions of the silt collecting system in discharging the sand carried by the feeding system and generating silt through reaction.

The silt collecting process further comprises a sand discharge pipeline 24 flushing process, wherein the sand discharge pipeline 24 flushing process is carried out by using a sand discharge flushing port 26 arranged on the sand discharge pipeline 24, and the problem of unsmooth sand discharge caused by blockage of the sand discharge pipeline 24 is avoided.

The process for producing the biogas by the anaerobic reactor for treating the kitchen slurry further comprises a kitchen slurry stirring process, wherein the kitchen slurry stirring process is carried out by using a side wall stirrer 17, the side wall stirrer 17 is provided with a plurality of side wall stirrers 17, the side wall stirrers 17 are obliquely arranged on the side wall of the reactor tank body 1 in the same direction, and the side wall stirrers 17 obliquely arranged in the same direction form rotational flow stirring during operation, so that the contact efficiency of microorganisms and substrates is enhanced, and the acidification of the anaerobic reactor is avoided.

Handle anaerobic reactor biogas production technology of meal kitchen thick liquids still includes sampling process, sampling process uses multiple sampling pipeline, multiple sampling pipeline is including setting up at the outside sample connection 27 of the reactor jar body 1, vertical setting is at the reactor jar internal portion and the sampling pipe 28 of being connected with sample connection 27, sampling pipe 28 sets up a plurality of sample connection 29 in vertical direction, set for not co-altitude according to the demand and sample, the sample of sample is used for material analysis chemical examination, so that monitor the inside vertical thick liquids digestion situation of the reactor jar body 1, in time discover the problem.

The process for generating the biogas by the anaerobic reactor for treating the kitchen slurry further comprises a heat preservation process, wherein the heat preservation process comprises heat preservation of the outer wall of the reactor tank body 1, heat preservation of the first circulating heat exchange system and heat preservation of the second circulating heat exchange system, heat loss is reduced, and energy consumption of the system is reduced.

The heat preservation of the outer wall of the reactor tank body 1 is realized by arranging a rock wool and color steel plate heat preservation layer 31 on the outer wall of the reactor tank body 1.

The volume of the reactor tank body 1 used in the process of generating biogas by the anaerobic reactor for treating the kitchen slurry is 2000-7500m³The height-diameter ratio H to D is 5: 12-5: 6, and the material is glass steel or steel; the reactor tank body 1 is vertically arranged, the base is fixed through a nut, the outer wall is fixed through a waist hoop, and the top 33 is sealed through a stainless steel sealing cover and a nut.

The volume of the rotary foam separator 18 is 35L-50m³The material is glass steel or steel.

The volume of the blanking barrel 9 is 15L-30m³The material is glass steel or steel.

Comparative example 1

Chinese patent application, CN201621476978.6, discloses a material heating and external circulation mixing device of a biogas slurry anaerobic reactor, wherein the heating mode is to pour hot water into an interlayer of the anaerobic reactor to exchange heat with biogas slurry in a tank body, the heat exchange of the interlayer of the tank body is easy to scale, and the difficulty in cleaning and maintenance is high; the circulation mode is external circulation, but the water inlet of the pump is bottom water inlet, and the pump needs a very high lift to the top, so that the energy consumption is high.

Comparative example 2

Chinese patent application, CN207435144U, discloses a high-efficiency double-circulation anaerobic reactor, wherein a primary circulation system circulates top liquid and bottom liquid, a secondary circulation system sludge collection device is connected with a sludge distribution system, the top liquid directly overflows to a buffer tank for circulation pumping, and scum is easily taken out by discharged water; the separator arranged at the top of the device has the effect of collecting sludge, can realize three-phase separation, has obvious treatment effect on industrial non-degradable wastewater, but is easy to block kitchen pretreatment slurry and cannot run,

comparative example 3

The invention discloses a method and a device for heating inlet water of an efficient anaerobic reactor, which can recycle waste heat in outlet water of the efficient anaerobic reactor to the inlet water to realize the heating purpose, but when the temperature of the inlet water is too high, the inlet water cannot be cooled to ensure the reaction temperature.

Comparative example 4

Chinese patent application, CN109020130A, discloses an anaerobic reactor and a sludge anaerobic digestion process using the anaerobic reactor, wherein a stirring device of the anaerobic digestion reactor is positioned at the bottom of a reaction zone, an external circulating pump is arranged for the sludge to flow back to the top, and the large sludge in the reaction zone can be cut up, thereby accelerating the reaction rate and improving the anaerobic digestion effect of the sludge; but it is not feasible to install in the lower part of the tank for treating the kitchen pulp with the diameter of up to 20 m.

Comparative example 5

Chinese patent application, CN109761449A discloses a novel anaerobic reactor and processing system based on UASB, and this novel anaerobic reactor utilizes siphon effluent collector pipe to go out water, degass at the degassing tank, collects the back through the triangle water collection weir of sedimentation tank and discharges from the outlet pipe, and mud subsides to mud fill back through the mud back flow to anaerobic reactor, guarantees that the mud concentration in the anaerobic reactor maintains stably, makes the system steady operation, but the process line is too long.

Comparative example 6

Chinese patent application, CN209065530U, discloses an IC anaerobic reactor, which provides an IC anaerobic reactor capable of effectively utilizing biogas generated by sewage anaerobic reaction and improving the degradation effect of pollutants. However, the biogas is directly introduced into the biogas combustion furnace, so that the pressure is unstable, negative pressure is easily caused to the tank body, and a biogas buffer tank and a biogas adding fan are required to be added. An upper layer three-phase separator and a lower layer three-phase separator can be arranged for sewage with low solid content, but the solid content of the kitchen slurry is up to 60000mg/L, so that the kitchen slurry is easy to block and is not feasible.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A biogas production anaerobic reactor for treating kitchen slurry comprises a reactor tank body, a biogas collection system and a silt collection system, wherein the biogas collection system and the silt collection system are arranged on the reactor tank body; the method is characterized in that: the reactor tank body is also provided with a first circulating heat exchange system and a second circulating heat exchange system; the first circulating heat exchange system comprises a discharging system, a heat exchange system and a feeding system, the discharging system comprises a blanking barrel, one end of the blanking barrel is connected with the top of the reactor tank body, and the other end of the blanking barrel is sequentially connected with the heat exchange system and the feeding system; the second circulation heat exchange system comprises a middle-upper discharging pipeline, a tank top spraying feeding pipeline and a tank bottom annular feeding pipeline, wherein the middle-upper discharging pipeline is connected with the middle upper part of the reactor tank body, the tank top spraying feeding pipeline and the tank bottom annular feeding pipeline are connected in parallel on the middle-upper discharging pipeline, the tank top spraying feeding pipeline is connected with the top of the tank body, and the tank bottom annular feeding pipeline is connected with the bottom of the tank body.

2. The biogas production anaerobic reactor for treating kitchen slurry according to claim 1, characterized in that: the feeding system comprises a material distribution pipeline arranged inside the reactor tank body, and the kitchen pretreatment slurry is connected with the material distribution pipeline through a pipeline; the discharging system also comprises a discharging collecting pipe and an overflow discharging pipe; the discharging collecting pipe is arranged in the reactor tank body, a plurality of branch pipes with upward openings are arranged on the discharging collecting pipe, the branch pipes are uniformly distributed on the radial section of the reactor tank body, the openings of the branch pipes are arranged below liquid in the reactor tank body, and one end of the discharging collecting pipe is connected with the middle part of the blanking barrel; the overflow discharge pipe is arranged at the upper part of the blanking barrel; the blanking pipe is arranged at the bottom of the blanking barrel, and the blanking pipe, the first circulating pump, the heat exchange system and the distributing pipeline are sequentially connected.

3. The biogas production anaerobic reactor for treating kitchen slurry according to claim 1, characterized in that: the heat exchange system comprises a heat exchanger, a thermometer connected with the heat exchanger, and a heat source and/or a cold source; the heat source is saturated steam, the steam conveying carrier is a steam pipe, the heat exchanger is connected with the steam pipe, and a steam regulating valve is arranged on the steam pipe; the cold source is cooling water, the carrier of the cooling water is a cooling water pipe, and the heat exchanger is connected with the cooling water pipe.

4. A biogas producing anaerobic reactor for treating kitchen pulp according to claim 1, 2 or 3, characterized in that: a second circulating pump is arranged on the discharging pipe at the middle upper part, the outlet of the second circulating pump is provided with two branches, one branch is connected with a tank top spraying feeding pipeline, the other branch is connected with a tank bottom annular feeding pipeline, the tank top spraying feeding pipeline is uniformly provided with a plurality of spraying branch pipes on the top of the reactor tank body, and the plurality of spraying branch pipes extend into the reactor tank body; the annular feeding pipeline at the bottom of the tank is connected with the tank body through a plurality of feeding branch pipes around the bottom of the reactor tank body.

5. The biogas production anaerobic reactor for treating kitchen slurry according to claim 4, characterized in that: and a plurality of side wall stirrers are obliquely arranged on the side wall of the reactor tank body in the same direction.

6. The biogas production anaerobic reactor for treating kitchen slurry according to claim 4, characterized in that: the biogas collecting system is arranged at the top of the reactor tank body and comprises a rotary foam separator, a biogas collecting pipe connected with the rotary foam separator and the reactor tank body, a dehydration backflow pipe connected with the lower part of the rotary foam separator and a gas pipe connected with the rotary foam separator; the silt collecting system comprises an inverted cone-shaped bottom plate, a silt discharge pipeline and a silt discharge pump, wherein the upper surface of the inverted cone-shaped bottom plate is inverted cone-shaped, the inverted cone-shaped bottom plate is arranged at the bottom of the reactor tank body, one end of the silt discharge pipeline is arranged at the upper part of the inverted cone-shaped bottom plate, and the other end of the silt discharge pipeline is arranged outside the reactor tank body and is connected with the silt discharge pump; and the sand discharge pipeline is provided with a sand discharge flushing port.

7. The biogas production anaerobic reactor for treating kitchen slurry according to claim 6, characterized in that: the volume of the reactor tank body is 2000-7500m³The height-diameter ratio H to D is 5: 12-5: 6, and the material is glass steel or steel; the reactor tank body is vertically arranged, the base is fixed through a nut, the outer wall is fixed through a waist hoop, and the top is sealed through a stainless steel sealing cover and a nut; the volume of the rotary foam separator is 35L-50m³The material is glass steel or steel; the volume of the blanking barrel is 15L-30m³The material is glass steel or steel.

8. A process for producing biogas by an anaerobic reactor for treating kitchen slurry is characterized by comprising the following steps: performing first circulating heat exchange and second circulating heat exchange on the kitchen slurry in the reactor tank body;

and the second circulation heat exchange comprises discharging from the middle upper part of the reactor tank body, and performing tank top spraying feeding or tank bottom annular feeding on the discharging from the middle upper part of the reactor tank body.

9. The anaerobic reactor biogas production process for treating kitchen slurry according to claim 8, characterized in that: the step of adjusting the temperature and exchanging the heat of the liquid discharged from the top in the reactor tank body comprises heating or cooling, a heat source is connected during heating, a cold source is connected during cooling, the liquid is subjected to heat exchange and temperature adjustment outside the reactor tank body, and the liquid after heat exchange and the kitchen pretreatment slurry are mixed and then enter the bottom of the reactor tank body.

10. The anaerobic reactor biogas production process for treating kitchen slurry according to claim 9, characterized in that: the first circulation heat exchange uses a first circulation heat exchange system, the first circulation heat exchange system comprises a discharging system, a heat exchange system and a feeding system, the discharging system comprises a blanking barrel, one end of the blanking barrel is connected with the top of the reactor tank body, and the other end of the blanking barrel is sequentially connected with the heat exchange system and the feeding system; the feeding system comprises a material distribution pipeline arranged inside the reactor tank body, and the kitchen pretreatment slurry is connected with the material distribution pipeline through a pipeline; the discharging system also comprises a discharging collecting pipe and an overflow discharging pipe; the discharging collecting pipe is arranged in the reactor tank body, a plurality of branch pipes with upward openings are arranged on the discharging collecting pipe, the branch pipes are uniformly distributed on the radial section of the reactor tank body, the openings of the branch pipes are arranged below liquid in the reactor tank body, one end of the discharging collecting pipe is connected with the middle part of the blanking barrel, and the liquid in the reactor tank body enters the discharging collecting pipe after passing through the openings of the branch pipes, so that the liquid enters the blanking barrel; the overflow discharging pipe is arranged at the upper part of the blanking barrel, and liquid in the reactor tank is discharged when the height of the liquid in the blanking barrel is higher than that of the overflow discharging pipe; the blanking pipe is arranged at the bottom of the blanking barrel, and the blanking pipe, the first circulating pump, the heat exchange system and the distribution pipeline are sequentially connected; the heat exchange system comprises a heat exchanger, a thermometer connected with the heat exchanger, and a heat source and/or a cold source, wherein the heat source is connected during temperature rising, and the cold source is connected during temperature lowering;

the second circulation heat exchange uses a second circulation heat exchange system, the second circulation heat exchange system comprises a middle-upper discharge pipeline, a tank top spraying feed pipeline and a tank bottom annular feed pipeline, the middle-upper discharge pipeline is connected with the middle upper part of the reactor tank body, and the tank top spraying feed pipeline and the tank bottom annular feed pipeline are connected in parallel on the middle-upper discharge pipeline; a second circulating pump is arranged on the discharging pipe at the middle upper part, the outlet of the second circulating pump is provided with two branches, one branch is connected with a tank top spraying feeding pipeline, the other branch is connected with a tank bottom annular feeding pipeline, the tank top spraying feeding pipeline is uniformly provided with a plurality of spraying branch pipes on the top of the reactor tank body, and the plurality of spraying branch pipes extend into the reactor tank body; the tank bottom annular feeding pipeline surrounds the bottom of the reactor tank body and is connected with the tank body through a plurality of feeding branch pipes; the middle-upper discharge pipeline discharges materials at the middle-upper part of the reactor tank body, and pumps the materials into the annular feeding pipeline at the bottom of the tank or the spraying feeding pipeline at the top of the reactor tank body after being pressurized by the second circulating pump so as to enter the bottom or the top of the reactor tank body;

the process for generating the biogas by the anaerobic reactor for treating the kitchen slurry also comprises a biogas collection process;

the anaerobic reactor biogas production process for treating the kitchen slurry further comprises a silt collecting and sand discharging process;

the silt collecting process also comprises a sand discharge pipeline flushing process;

the anaerobic reactor biogas production process for treating the kitchen slurry further comprises a kitchen slurry stirring process, wherein a side wall stirrer is used for the kitchen slurry stirring process, the side wall stirrer is provided with a plurality of side wall stirrers, and the side wall stirrers are obliquely arranged on the side wall of the reactor tank body in the same direction.