CN210765300U - Feeding device for dry anaerobic digestion system - Google Patents
Feeding device for dry anaerobic digestion system Download PDFInfo
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- CN210765300U CN210765300U CN201921066012.9U CN201921066012U CN210765300U CN 210765300 U CN210765300 U CN 210765300U CN 201921066012 U CN201921066012 U CN 201921066012U CN 210765300 U CN210765300 U CN 210765300U
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- 230000029087 digestion Effects 0.000 title claims abstract description 33
- 239000000872 buffer Substances 0.000 claims abstract description 28
- 230000008676 import Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000009826 distribution Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 30
- 239000004744 fabric Substances 0.000 abstract description 3
- 239000010813 municipal solid waste Substances 0.000 description 15
- 238000007599 discharging Methods 0.000 description 12
- 239000002893 slag Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 5
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
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- 210000003608 fece Anatomy 0.000 description 3
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- 239000010802 sludge Substances 0.000 description 3
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- 241000271566 Aves Species 0.000 description 2
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- 238000009264 composting Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002054 inoculum Substances 0.000 description 2
- 244000144972 livestock Species 0.000 description 2
- 239000010871 livestock manure Substances 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- 239000010865 sewage Substances 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
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- 239000010794 food waste Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The utility model discloses a feed arrangement for dry-type anaerobic digestion system, dry-type anaerobic digestion system includes the anaerobic jar, its characterized in that anaerobic jar top import is connected with the inlet pipe, the feeding distributor is established in anaerobic jar top import, the feeding buffer is established on anaerobic jar upper portion, the access connection of feeding distributor and feeding distributing pipe, the export of feeding distributing pipe is located feeding buffer top, and feeding buffer bottom is the cone structure of indent. The utility model discloses realize that the material is by the slow even cloth in anaerobic jar top, the bottom discharge to the short stream problem that inhomogeneous feeding brought has been avoided.
Description
Technical Field
The utility model belongs to the technical field of organic refuse treatment, concretely relates to a feed arrangement for dry-type anaerobic digestion system.
Background
The organic garbage comprises organic solid wastes such as food and beverage garbage, kitchen garbage, classified domestic garbage, livestock and poultry manure, agricultural and pastoral straws, municipal sludge, livestock and poultry died of diseases and the like. Because the classification mechanism is not perfect in China, the traditional organic garbage is usually treated by landfill, incineration or aerobic composting. Because of the restriction of available land, landfill faces the more and more difficult site selection problem in China; although the incineration can achieve a better reduction effect, the incineration cost of the organic garbage with higher water content is often greatly increased; organic waste compost has been in China for hundreds of years, but has a series of problems of odor pollution, product export and the like, so that the problem of large-scale organic waste centralized disposal cannot be thoroughly and effectively solved by aerobic composting.
The anaerobic digestion biogas production technology can change organic garbage into valuable, and the generated biogas belongs to renewable biomass energy and new energy which is encouraged by the state and replaces fossil fuel, and is particularly important in the era of shortage of energy in the world. Anaerobic digestion techniques can be divided into two major categories, dry (solids content 15-40%) and wet (solids content < 15%) digestion, depending on the feed solids content.
In recent years, wet anaerobic digestion technology is widely applied to the treatment of food wastes with higher water content, the main reason is that wet anaerobic digestion has relatively low requirements on feeding, discharging and digesting equipment, but the wet anaerobic digestion simultaneously brings about the problems of large water consumption and accumulation of scum and settled sand caused by internal layering of an anaerobic tank, the biogas production is interrupted, the biogas slurry amount is increased due to high water consumption, and the sewage treatment cost is remarkably increased.
The dry anaerobic digestion aims at keeping the original solid content state of the organic garbage for digestion and gas production, and only the material with extremely high concentration (the solid content is more than 40 percent) needs to be diluted by adding water. Therefore, the dry anaerobic digestion process is adopted, water is not needed to be added, the subsequent biogas slurry dehydration and sewage treatment cost is reduced, and meanwhile, the anaerobic tank adopts high-load digestion and has smaller volume than a wet anaerobic tank.
However, the dry anaerobic digestion has relatively high requirements on equipment for feeding, discharging, digesting, stirring and the like, the core technology is mainly imported abroad at present, the technology mainly comprises ValorgA in France, DRANCO in Belgium, KOMPOGAS in Switzerland and BTV in Germany, but few companies which can independently build and operate the dry anaerobic technology in China are available, and the related technology is still in the starting stage, so that the popularization and application of the technology are greatly limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a feed arrangement for dry-type anaerobic digestion system according to above-mentioned prior art's weak point, realizes that the material is by the slow even cloth in anaerobic tank top, the bottom discharge to the short stream problem that inhomogeneous feeding brought has been avoided.
In order to achieve the above purpose, the technical solution of the present invention is as follows: the utility model provides a feed arrangement for dry-type anaerobic digestion system, dry-type anaerobic digestion system includes the anaerobic jar, its characterized in that anaerobic jar top import is connected with the inlet pipe, feeding distributor is established to anaerobic jar top import, feeding buffer is established on anaerobic jar upper portion, feeding distributor and the access connection of feeding distributing pipe, the export of feeding distributing pipe is located feeding buffer top, and feeding buffer is the cone structure.
Further, the anaerobic jar is a vertical anaerobic jar.
Furthermore, the cone angle of the cone structure of the feeding buffer is 100-150 degrees, and the diameter of the cone is 0.5-2m, so that the short flow caused by the impact of the material in the tank after the material freely falls into the tank can be avoided.
Furthermore, a feeding distributor is arranged at an inlet at the top of the anaerobic tank, a plurality of feeding buffers are uniformly distributed at the upper part of the anaerobic tank, and each feeding buffer is connected with the feeding buffer through one feeding distributing pipe.
Furthermore, all establish the heat preservation outside inlet pipe and the feeding distributing pipe, and still encircle in the heat preservation inlet pipe and feeding distributing pipe are provided with the heat exchange tube, and hot water supply mouth and hot water return water mouth are established respectively to the heat exchange tube both ends.
Further, the pipe diameter of the feeding pipe is 250-500mm, and the pipe diameter of the feeding distribution pipe is 200-400 mm.
Furthermore, the anaerobic tank is a cylindrical conical bottom steel structure tank body, the bottom overhead layout is adopted, and the included angle between the conical bottom and the horizontal plane is 50-60 degrees.
The utility model realizes the slow and even distribution of the materials from the top of the anaerobic tank and the discharge from the bottom through the feeding distributing pipe and the feeding buffer, thereby avoiding the short flow problem caused by uneven feeding; the feeding is heated in a hot water circulation indirect heat exchange mode, and the problem of increase of the water content of the material caused by direct steam injection in the traditional vertical dry anaerobic process is solved.
Drawings
FIG. 1 is a schematic view of the dry anaerobic digestion device for organic garbage of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
FIG. 3 is a schematic diagram of a backmix feed buffer.
Fig. 4 is a schematic diagram of a backmixing feed-back feed distributor.
Fig. 5 is a top view of fig. 4.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example with reference to the accompanying drawings to facilitate understanding by those skilled in the art.
The utility model discloses in organic rubbish include food and beverage rubbish, surplus rubbish in kitchen, categorised domestic waste, birds animal manure, farming and pasturing straw, municipal sludge, the dead birds of illness poultry etc. include in the picture: a raw material feeding screw hopper 1, a mixing tank 2, a backmixing feeding pipe 3, a mixing tank heat exchange pipe 4, a backmixing feeding heat exchange pipe 5, a backmixing screw 6, a backmixing feeding knife valve 7, a mixing tank discharging knife valve 8, a backmixing plunger pump 9, a backmixing feeding knife valve 10, a backmixing feeding distributor 11, a backmixing feeding distribution pipe 12, a backmixing feeding buffer 13, a positive and negative pressure protector 14, a biogas outlet pipe 15, a slag discharge plunger pump 16 and a biogas compressor 17, the device comprises a biogas stirring control valve group 18, a biogas stirring diffusion pipe 19, a color steel plate 21, a scum discharge pipe 22, a scum return pipe 23, a discharge knife valve 24, a scum spiral 25, a scum knife valve 26, a backmixing feed pipe heat-insulating layer 27, a compressed biogas inlet 28, a hot water supply port 29, a hot water return port 30, a scum outer discharge pipe 31, a backmixing feed buffer 34, a mixing tank stirrer 35, a double helix 36 at the bottom of a mixing tank and an anaerobic tank bottom valve 37.
As shown in the figure, the dry type anaerobic digestion device for the organic garbage is characterized by comprising
The anaerobic tank is provided with an inlet at the top and an outlet at the bottom, a discharging knife valve is arranged above the outlet at the bottom, a back-mixing feeding distributor 11 is arranged at the inlet at the top of the anaerobic tank, a back-mixing feeding buffer is arranged at the upper part of the anaerobic tank, the back-mixing feeding distributor 11 is connected with a back-mixing feeding buffer 13 through a back-mixing feeding distributing pipe 12, and a methane outlet pipe 15 is also arranged at the top of the anaerobic tank;
the anaerobic tank is connected with the mixing device through a back-mixing feeding device, the back-mixing feeding device comprises a back-mixing screw 6 and a back-mixing feeding pipe 3, the back-mixing screw 6 is connected with an opening in the top of the mixing tank and an outlet in the bottom of the anaerobic tank, the back-mixing feeding pipe is connected with an inlet in the top of the anaerobic tank and an outlet in the bottom of the mixing tank, the opening in the top of the mixing tank is also connected with a raw material feeding screw hopper 1, and a heat exchange pipe 4 of the mixing tank is arranged in the mixing tank;
slag discharging device, slag discharging device sets up in anaerobic tank bottom exit, slag discharging device is including the spiral 25 of slagging tap, the input of spiral 25 of slagging tap is located ejection of compact sword valve 26 below, the output of the spiral of slagging tap is connected the plunger pump 16 of slagging tap, and the plunger pump of slagging tap and the spiral of slagging tap between establish the sword valve 26 of slagging tap.
The anaerobic tank body 32 is a cylindrical conical bottom steel structure tank body, adopts a bottom overhead layout, has an included angle of 50-60 degrees between the conical bottom and the horizontal plane, adopts a top 3-point type uniform distribution mode for feeding, and adopts a bottom discharging feeding and discharging mode, wherein the top 3-point type feeding comprises 1 backmixing feeding distributor 11, 3 backmixing feeding distribution pipes 12 and 3 backmixing feeding buffers 13, the backmixing feeding buffers adopt a cone structure, the angle of the cone α is 100 degrees, the diameter of the cone is 0.5-2m, the impact of free falling bodies of materials directly entering the tank body on the materials in the tank body can be avoided to form short flow, a special scum discharging pipe 22 is arranged at the upper part of the anaerobic tank body, the scum at the top can be discharged through a scum plunger pump and valve control, or the scum at the bottom can be returned to the anaerobic tank through a scum return pipe 23, so that the top light material circulation of the anaerobic tank can be realized, a mixed feeding heat exchange pipe 5 and a backmixing feeding material heat insulation layer 27 are arranged outside the backmixing feeding heat exchange pipe 3, a hot water supply port and a hot water supply port are respectively arranged at two ends of the.
Example (b): the embodiment specifically relates to a vertical dry anaerobic digestion device and a method for organic garbage, wherein the dry anaerobic digestion device is operated according to the following method (namely principle):
the method comprises the steps of inputting materials such as dehydrated biogas residues, sludge, river sediment and cow dung which can be used for anaerobic digestion inoculation into a material mixing tank 2 by using a raw material feeding spiral hopper 1, conveying inoculum to an anaerobic tank through a material mixing device and a material returning and feeding device, wherein the inoculum size accounts for 20-50% of the total volume of the anaerobic tank, starting a material mixing tank heat exchange tube 4 and a material returning and feeding heat exchange tube 5 to raise the temperature of materials entering the tank to 35 +/-2 ℃, gradually increasing the feeding amount until the anaerobic tank starts to produce biogas, and gradually increasing the feeding amount to a design load, wherein the feeding method comprises the following steps: organic garbage after pretreatment enters a mixing tank 2 through a raw material feeding spiral hopper 1, a discharging knife valve 24 is opened, a return screw 6 is opened, a return feeding knife valve 7 is opened, the proportion of return materials at the bottom of an anaerobic tank to the raw materials is controlled to be about 5-10/1 through the return screw 6 and the return feeding knife valve 7, a discharging knife valve 8 of the mixing tank is opened, a back mixing plunger pump 9 and a back mixing feeding knife valve 10 are opened, mixed materials are sent to a back mixing feeding distributor 11 at the top of the anaerobic tank 3, then the mixed materials are fed through 3 back mixing feeding distributing pipes 12, in order to reduce the feeding flow rate of the mixed materials, a back mixing feeding buffer 13 is arranged under the back mixing feeding distributing pipes 12, and the mixed materials overflow into the anaerobic tank through the back mixing feeding buffer. And (3) when anaerobic feeding is carried out, opening a slag discharge spiral 25, opening a slag discharge knife valve 26 and opening a slag discharge plunger pump 16, and conveying anaerobic digestion biogas slurry to a dehydration machine room.
The anaerobic tank is formed by welding a steel structure, the bottom of the anaerobic tank is supported by a steel concrete structure, the anaerobic tank 3 is a cylindrical cone, the size of the tank body can be changed according to the treatment scale, the outer wall of the anaerobic tank is provided with an anaerobic tank heat preservation layer 20 (rock wool 100 and 200 mm), and the heat preservation layer is externally provided with an outer wall color steel plate 21 for protection. The anaerobic tank adopts a hot water circulation heating mode, and the temperature in the anaerobic tank 3 is maintained at 35 +/-2 ℃ through the heat exchange tube 4 of the mixing box and the back mixing feeding heat exchange tube 5 and through automatic temperature feedback control.
The pipe diameter of the back-mixing feeding pipe is 250-500mm, the pipe diameter of the back-mixing feeding distribution pipe is 200-400mm, the outer wall of the back-mixing feeding distribution pipe is provided with a hot water circulating heat exchange pipe and a temperature feedback control system, and the temperature of materials entering the anaerobic tank can be accurately controlled by controlling the circulation quantity of hot water.
When the daily slag discharge can not meet the sand discharge requirement of the system, settled sand in the system is periodically discharged out of the system through the bottom valve 37 at the bottom of the anaerobic tank and the double-helix 36 for sand removal at the bottom of the mixing tank.
The anaerobic tank is provided with a positive-negative pressure protector, a biogas outlet pipe, a biogas foam separator, a manhole, an observation hole, a pressure gauge, a thermometer, a pH meter and other accessory facilities.
The beneficial effect of this embodiment lies in: the vertical cylindrical conical bottom anaerobic tank is adopted, and the occupied area of dry anaerobic is greatly saved. The dry-type anaerobic jar gets into through the top, and the bottom is discharged to constantly circulate through the compounding jar, the marsh gas agitating unit in addition has greatly increased the stirring and the homogeneity of material in the anaerobic jar, has reduced the anaerobic jar bottom simultaneously and has blockked up the risk. Through the backmixing feeding distribution device and the backmixing feeding buffer of special design, when realizing the even cloth of feeding, greatly reduced the influence that the top feeding directly impacted the interior material of anaerobism jar and brought. Through setting up outer row of top dross and reflux unit, when can realize that the material that slightly wafts gets rid of, realize that light material from top to bottom circulates to the tank deck dross accumulation problem that brings has been solved to the top of a business and has been gone out down. The heating device of special design has avoided the steam to directly spout the material dilution that brings, natural pond liquid increases problem and pipeline under pressure risk problem, and through hot water circulation feedback control, its material temperature control is directly to spout the mode precision higher than steam.
Therefore, the device is greatly improved compared with other dry anaerobic digestion devices in aspects of occupied land, operation control and the like.
Claims (7)
1. The utility model provides a feed arrangement for dry-type anaerobic digestion system, dry-type anaerobic digestion system includes anaerobic jar, its characterized in that anaerobic jar top import is connected with the inlet pipe, feeding distributor is established to anaerobic jar top import, feeding buffer is established on anaerobic jar upper portion, feeding distributor and the access connection of feeding distributing pipe, the export of feeding distributing pipe is located feeding buffer top, and feeding buffer bottom is the cone structure.
2. The feeding apparatus for a dry anaerobic digestion system according to claim 1, wherein the anaerobic tank is a vertical anaerobic tank.
3. The feeding apparatus for a dry anaerobic digestion system as claimed in claim 1 or 2, wherein the cone angle of the cone structure at the bottom of the feeding buffer is 100-150 ° and the cone diameter is 0.5-2 m.
4. The feeding device of claim 1 or 2, wherein a feeding distributor is provided at an inlet of a top of the anaerobic tank, a plurality of feeding buffers are uniformly distributed at an upper portion of the anaerobic tank, and each feeding buffer is connected with the feeding buffer through a feeding distribution pipe.
5. The feeding device for the dry anaerobic digestion system as claimed in claim 1 or 2, wherein the feeding pipe and the feeding distribution pipe are both provided with an insulating layer, and the insulating layer is further provided with a heat exchange pipe surrounding the feeding pipe and the feeding distribution pipe, and the two ends of the heat exchange pipe are respectively provided with a hot water supply port and a hot water return port.
6. The feeding device for dry anaerobic digestion system as claimed in claim 1 or 2, wherein the feeding pipe has a pipe diameter of 250-500mm and the feeding distribution pipe has a pipe diameter of 200-400 mm.
7. The feeding device for the dry anaerobic digestion system as claimed in claim 1 or 2, characterized in that the anaerobic tank is a cylindrical conical bottom steel tank body, the bottom overhead layout is adopted, the included angle between the conical bottom and the horizontal is 50-60 degrees, the height-diameter ratio of the cylindrical part of the tank body is more than or equal to 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921066012.9U CN210765300U (en) | 2019-07-09 | 2019-07-09 | Feeding device for dry anaerobic digestion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921066012.9U CN210765300U (en) | 2019-07-09 | 2019-07-09 | Feeding device for dry anaerobic digestion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210765300U true CN210765300U (en) | 2020-06-16 |
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ID=71111998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921066012.9U Active CN210765300U (en) | 2019-07-09 | 2019-07-09 | Feeding device for dry anaerobic digestion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210765300U (en) |
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- 2019-07-09 CN CN201921066012.9U patent/CN210765300U/en active Active
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Effective date of registration: 20240428 Address after: No. 4 Chengtai Road, Taiping Street, Xiangcheng District, Suzhou City, Jiangsu Province, 215137 Patentee after: Suzhou Simei Technology Co.,Ltd. Country or region after: China Address before: 200092 No. two, 901 North Road, Yangpu District, Shanghai, Zhongshan Patentee before: SHANGHAI MUNICIPAL ENGINEERING DESIGN INSTITUTE (Group) Co.,Ltd. Country or region before: China |