CN110002584B - Efficient integrated excess sludge anaerobic digester - Google Patents
Efficient integrated excess sludge anaerobic digester Download PDFInfo
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- CN110002584B CN110002584B CN201910400772.7A CN201910400772A CN110002584B CN 110002584 B CN110002584 B CN 110002584B CN 201910400772 A CN201910400772 A CN 201910400772A CN 110002584 B CN110002584 B CN 110002584B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2813—Anaerobic digestion processes using anaerobic contact processes
Abstract
The invention discloses an efficient integrated excess sludge anaerobic digester which is characterized by comprising a shell, wherein the top of the shell is provided with a cover plate; the lower part in the shell is provided with a reaction module, and the upper part is provided with a gas storage module; the lower part of the reaction module is a sludge zone, the upper part of the reaction module is a supernatant zone, a sludge inlet pipe is laid at the bottom in the sludge zone, and sludge is communicated with the sludge inlet pipe through an external sludge inlet screw pump; the supernatant liquid area and the sludge area are respectively communicated with a supernatant liquid circulating pipe and a sludge circulating inlet pipe, and are connected in parallel and then connected with a sludge circulating outlet pipe through a sludge circulating pump, and the sludge circulating outlet pipe is communicated with a sludge inlet at the top of the cover plate; a mud receiving disc is arranged in the gas storage module; the sludge is treated by anaerobic organisms after being reacted by the reaction module, and the generated biogas is stored in the gas storage module and is conveyed to users through the exhaust port at the top of the cover plate; and the digested sludge in the sludge area is output through a sludge outlet screw pump. The invention has compact structure, good liquid-solid mass transfer effect, convenient operation and maintenance, strong organic load impact resistance and good treatment effect.
Description
Technical Field
The invention relates to a high-efficiency integrated excess sludge anaerobic digester, and belongs to the technical field of sludge treatment.
Background
The excess sludge is a byproduct generated in the sewage treatment process, contains a large amount of pathogenic microorganisms, harmful heavy metals and a large amount of substances which are difficult to degrade, and is a public nuisance which is harmful to environmental sanitation as well as wastes land resources. On the other hand, nutrients such as nitrogen and phosphorus contained in the sludge can be used as fertilizers, and the generated methane can be used as energy substances. Therefore, realizing the harmlessness, reduction and reclamation of the sludge is one of the problems to be solved urgently in the environmental treatment process.
Common methods of excess sludge treatment today include landfill, incineration, aerobic composting and anaerobic digestion. The land occupation area for landfill is large, the pollution is caused to underground water and atmosphere, the construction cost of a landfill plant is higher, and the treatment cost is increased by long-distance transportation; polluting gas is generated by burning, the treatment capacity is small, and certain potential safety hazard exists; the aerobic composting has some bottlenecks in technical theory and process, such as large amount of auxiliary materials, difficult control of odor and the like; anaerobic digestion can improve the efficiency of subsequent treatment and reduce the energy consumption of the subsequent treatment, has low cost, and can meet wide market prospect in order to relieve the serious shortage of energy resources in China.
The anaerobic digester is a core technology of an anaerobic biological treatment process, the development is rapid in recent years, and the development of the anaerobic digester drives the development of the anaerobic biological treatment technology. Since the advent of the first anaerobic digester as a first generation anaerobic reactor in the uk in 1896, followed by the Upflow Anaerobic Sludge Bed (UASB) invented by Lettinga et al in the netherlands in 1974, which marked that anaerobic reactors entered a new era, these reactors were called second generation reactors, and on the basis of this, third generation reactors such as anaerobic granular sludge expanded bed (EGSB), anaerobic internal circulation reactor (IC) were developed. The existing anaerobic digester has the defects of poor liquid-solid mass transfer effect, inconvenient operation and maintenance, poor organic load impact resistance and the like, so that the method has strong practical significance for vigorously developing the high-efficiency anaerobic digester under the condition of increasingly tense energy sources, especially under the policy of advocating energy conservation and emission reduction in China.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the existing anaerobic digester has the problems of poor liquid-solid mass transfer effect, inconvenient operation and maintenance, poor organic load impact resistance and the like.
In order to solve the problems, the invention provides a high-efficiency integrated excess sludge anaerobic digester which is characterized by comprising a shell, wherein the top of the shell is provided with a cover plate with the periphery extending downwards; the lower part in the shell is provided with a reaction module, and the upper part is provided with a gas storage module; the lower part of the reaction module is a sludge zone, the upper part of the reaction module is a supernatant zone, a sludge inlet pipe is laid at the bottom in the sludge zone, and sludge is communicated with the sludge inlet pipe through an external sludge inlet screw pump; the supernatant liquid area and the sludge area are respectively communicated with a supernatant liquid circulating pipe and a sludge circulating inlet pipe, and are connected in parallel and then connected with a sludge circulating outlet pipe through a sludge circulating pump, and the sludge circulating outlet pipe is communicated with a sludge inlet at the top of the cover plate; a mud receiving disc is arranged in the gas storage module; liquid seal grooves are respectively arranged on two sides of the joint of the shell and the cover plate, clear water is contained in the liquid seal grooves, springs are arranged at the bottom in the liquid seal grooves, the upper ends of the springs are fixedly connected with the cover plate, and the lower ends of the springs are fixedly connected with the bottom of the liquid seal grooves; the sludge is treated by anaerobic organisms after being reacted by the reaction module, and the generated biogas is stored in the gas storage module and is conveyed to users through the exhaust port at the top of the cover plate; and the digested sludge in the sludge area is output through a sludge outlet screw pump.
Preferably, the shell is cylindrical, and the cover plate is provided with symmetrical hanging rings.
More preferably, the cover plate is fixedly connected with the liquid seal groove through 3 adjustable roller positioning bolts, and the adjustable roller positioning bolts are used for adjusting the mud inlet on the cover plate to be overlapped with the central axis of the mud receiving disc.
Preferably, the liquid seal grooves are symmetrically arranged on the cross section of the shell.
Preferably, the mud receiving disc comprises inverted discs which are odd and distributed in a tower shape, and a splayed distributor is arranged below each inverted disc.
Preferably, the cross-sectional area of the mud receiving disc is 3/4 of the cross-sectional area of the shell.
Preferably, the supernatant circulating pipe and the sludge circulating inlet pipe are respectively provided with a control valve.
More preferably, a control valve on the sludge circulating inlet pipe is in an open state, so that sludge in the sludge area enters the sludge receiving disc through the sludge inlet; the control valve on the supernatant circulating pipe is opened or closed according to the state of sludge on the sludge receiving disc, and when the sludge on the sludge receiving disc is deposited, the control valve is opened to make the supernatant in the supernatant area wash the sludge receiving disc.
Preferably, the flow speed of the sludge in the sludge circulation outlet pipe is 1-5 m/s.
The feeding of the reaction module of the invention enters through the mud inlet screw pump, thus ensuring the smooth of the conveying pipeline, the discharging is also discharged through the mud outlet screw pump, and the mud outlet is continuous and uniform; the sludge bed layer of the reaction module is circulated to a sludge receiving disc above the gas storage module through a circulating sludge pump, so that sludge is prevented from being deposited, and the circulating sludge is uniformly distributed in a sludge bed area; the air storage module is provided with symmetrically distributed air outlets to ensure the pressure balance in the air chamber.
The sludge discharge switch which is arranged by the reaction module and keeps a long-term open state circulates sludge through the circulating sludge pump, so that the replacement and the excellence elimination of granular sludge in a sludge bed are realized, the treatment effect of the sludge bed is effectively guaranteed, and the stable operation of the reactor is maintained.
Compared with the prior art, the invention has the following beneficial effects:
1. the reactor is integrated, the processing is simple, the structure is compact, and the installation is convenient;
2. the sludge screw pump plays roles in conveying, crushing and stirring, and compared with a conventional stirrer, the sludge screw pump has the advantages of reduced power and energy consumption saving;
3. the mud receiving disc adopts a structure that an inverted disc is combined with a splayed distributor, so that the uniform distribution and mixing effect on the circulating sludge are realized, and the mass transfer effect is enhanced;
4. the side wall of the reaction module is provided with a sight glass and two outlets, the height of the sludge liquid level in the reaction module is observed through the sight glass, and the two outlets are respectively connected with a supernatant circulation switch which is opened irregularly as required and a sludge circulation switch which is opened for a long time. The sludge receiving disc is flushed by controlling the discharge of the supernatant, sludge accumulation of the sludge receiving disc is prevented, sludge sedimentation is prevented by long-term circulating bottom sludge, and new and old replacement of granular sludge is realized;
5. clean water is filled in the symmetrically distributed liquid seal grooves arranged on the side wall of the gas storage module to play a role of liquid seal, and the water quantity can be added to ensure the air tightness of the gas storage module;
6. the gas storage module cover plate is connected with the bottom of the liquid seal tank at the upper end of the digestion tank through a spring, and the spring can be lifted to balance the internal pressure of the gas storage module.
Drawings
FIG. 1 is a schematic structural diagram of a high-efficiency integrated excess sludge anaerobic digester provided by the invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural view of an adjustable roller positioning bolt.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
Examples
As shown in fig. 1-3, the efficient integrated excess sludge anaerobic digester provided by the invention is characterized by comprising a shell 20, wherein the top of the shell 20 is provided with a cover plate 7 extending downwards; the lower part in the shell 20 is provided with a reaction module I, and the upper part is provided with a gas storage module II; the lower part of the reaction module I is a sludge zone 3, the upper part of the reaction module I is a supernatant zone 4, a sludge inlet pipe 2 is laid at the bottom in the sludge zone 3, and sludge is communicated with the sludge inlet pipe 2 through an external sludge inlet screw pump 1; the supernatant liquid area 4 and the sludge area 3 are respectively communicated with a supernatant liquid circulating pipe 16 and a sludge circulating inlet pipe 15, the supernatant liquid circulating pipe 16 and the sludge circulating inlet pipe 15 are connected in parallel and then connected with a sludge circulating outlet pipe 18 through a sludge circulating pump 17, and the sludge circulating outlet pipe 18 is communicated with a sludge inlet 10 at the top of the cover plate 7.
A mud receiving disc is arranged in the gas storage module II; liquid seal grooves 6 are respectively arranged on two sides of the joint of the shell 20 and the cover plate 7, clear water 5 is contained in the liquid seal grooves 6, the water amount can be added, the height of the liquid seal groove body is more than 2.5m, the height of the liquid level in the groove is kept at 1m, and water is added if the height is lower than 1 m. The bottom in the liquid seal groove 6 is provided with a spring 14, and the spring 14 can be lifted to balance the pressure. The upper end of the spring 14 is fixedly connected with the cover plate 7, and the lower end of the spring is fixedly connected with the bottom of the liquid seal groove 6.
The sludge is treated by anaerobic organisms after being reacted by the reaction module I, and the generated biogas is stored in the gas storage module II and is conveyed to users through the exhaust port 8 at the top of the cover plate 7; the digested sludge in the sludge area 3 is output through a sludge outlet screw pump 19.
The shell 20 is cylindrical, and the cover plate 7 is provided with symmetrical hanging rings 9. The cover plate 7 is fixedly connected with the liquid seal tank 6 through 3 adjustable roller positioning bolts 13, and the adjustable roller positioning bolts 13 (shown in figure 3) are used for adjusting the mud inlet 10 on the cover plate 7 to be overlapped with the central axis of the mud receiving disc. The liquid seal grooves 6 and the shell 20 are symmetrically arranged on the cross section.
The mud receiving disc comprises 5 inverted buckle discs 11 distributed in a tower shape, and a splayed distributor 12 is arranged below each inverted buckle disc 11. The cross-sectional area of the mud pan is 3/4 of the cross-sectional area of the housing 20.
The supernatant circulating pipe 16 and the sludge circulating inlet pipe 15 are respectively provided with a control valve. The control valve on the sludge circulating inlet pipe 15 is in an open state, so that the sludge in the sludge area 3 enters the sludge receiving disc through the sludge inlet 10; the control valve on the supernatant circulating pipe 16 is opened or closed according to the state of sludge on the sludge receiving tray, and when the sludge on the sludge receiving tray is deposited, the control valve is opened to make the supernatant in the supernatant zone 4 wash the sludge receiving tray. The flow velocity of the sludge in the sludge circulation outlet pipe 18 is 1-5 m/s.
The operation mode of the invention is as follows:
the sludge is input through a sludge inlet screw pump 1, is subjected to anaerobic biological treatment after being reacted by a reaction module I at the bottom, and the generated biogas is stored in a gas storage module II at the upper end inside the digester and is conveyed to a user through a gas outlet 8. The side wall of the reaction module I is provided with a pipe orifice for flowing out circulating supernatant and circulating sludge, a sludge circulating inlet pipe 15 and a supernatant circulating pipe 16 which extend out of the pipe orifice are connected in parallel after passing through a valve and are conveyed to a sludge circulating outlet pipe 18 through a sludge circulating pump 17, and the sludge and the supernatant in the sludge circulating outlet pipe 18 are conveyed to a sludge receiving tray in the gas storage module II to participate in circulation. The digested sludge is transported through a sludge outlet pipe extending into the middle upper end of the sludge area 3 and is output through a sludge outlet screw pump 19 (the arrow in fig. 1 is the material flow direction).
Claims (8)
1. An efficient integrated excess sludge anaerobic digester is characterized by comprising a shell (20), wherein the top of the shell (20) is provided with a cover plate (7) with the periphery extending downwards; the lower part in the shell (20) is provided with a reaction module (I), and the upper part is provided with a gas storage module (II); the lower part of the reaction module (I) is a sludge zone (3), the upper part of the reaction module (I) is a supernatant liquid zone (4), a sludge inlet pipe (2) is laid at the bottom in the sludge zone (3), and sludge is communicated with the sludge inlet pipe (2) through an external sludge inlet screw pump (1); the supernatant liquid area (4) and the sludge area (3) are respectively communicated with a supernatant liquid circulating pipe (16) and a sludge circulating inlet pipe (15), the supernatant liquid area and the sludge circulating inlet pipe are connected in parallel and then connected with a sludge circulating outlet pipe (18) through a sludge circulating pump (17), and the sludge circulating outlet pipe (18) is communicated with a sludge inlet (10) at the top of the cover plate (7); a mud receiving disc is arranged in the gas storage module (II); two sides of the joint of the shell (20) and the cover plate (7) are respectively provided with a liquid seal groove (6), clear water (5) is contained in the liquid seal groove (6), the bottom in the liquid seal groove (6) is provided with a spring (14), the upper end of the spring (14) is fixedly connected with the cover plate (7), and the lower end of the spring is fixedly connected with the bottom of the liquid seal groove (6); the sludge is treated by anaerobic organisms after being reacted by the reaction module (I), and the generated biogas is stored in the gas storage module (II) and is conveyed to users through the exhaust port (8) at the top of the cover plate (7); the sludge digested in the sludge area (3) is output through a sludge outlet screw pump (19); the mud receiving disc comprises inverted buckle disc discs (11) which are odd and distributed in a tower shape, and a splayed distributor (12) is arranged below each inverted buckle disc (11).
2. The efficient integrated excess sludge anaerobic digester as claimed in claim 1, wherein the housing (20) is cylindrical and the cover plate (7) is provided with symmetrical rings (9).
3. The efficient integrated excess sludge anaerobic digester as claimed in claim 2, wherein the cover plate (7) is fixedly connected with the liquid seal tank (6) through 3 adjustable roller positioning bolts (13), and the adjustable roller positioning bolts (13) are used for adjusting the sludge inlet (10) on the cover plate (7) to coincide with the central axis of the sludge receiving disc.
4. The efficient integrated excess sludge anaerobic digester as claimed in claim 1, wherein the liquid seal tank (6) and the housing (20) are arranged symmetrically on the cross section.
5. The efficient integrated excess sludge anaerobic digester as claimed in claim 1, wherein the cross-sectional area of the receiving sludge tray is 3/4 of the cross-sectional area of the housing (20).
6. The efficient integrated excess sludge anaerobic digester as claimed in claim 1, wherein the supernatant circulating pipe (16) and the sludge circulating inlet pipe (15) are respectively provided with a control valve.
7. The efficient integrated excess sludge anaerobic digester as claimed in claim 6, wherein the control valve on the sludge circulation inlet pipe (15) is in an open state, so that the sludge in the sludge area (3) enters the sludge receiving tray through the sludge inlet (10); the control valve on the supernatant circulating pipe (16) is opened or closed according to the state of the sludge on the sludge receiving disc, and when the sludge on the sludge receiving disc is deposited, the control valve is opened to make the supernatant in the supernatant area (4) flush the sludge receiving disc.
8. The efficient integrated excess sludge anaerobic digester as claimed in claim 1, wherein the sludge flow rate in the sludge circulation outlet pipe (18) is 1-5 m/s.
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| CN201910400772.7A CN110002584B (en) | 2019-05-15 | 2019-05-15 | Efficient integrated excess sludge anaerobic digester |
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| CN201910400772.7A CN110002584B (en) | 2019-05-15 | 2019-05-15 | Efficient integrated excess sludge anaerobic digester |
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| CN110002584B true CN110002584B (en) | 2021-06-04 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2190113Y (en) * | 1994-05-28 | 1995-02-22 | 河北轻化工学院 | Reactor with anaerobic sludge bed |
| CN1569687A (en) * | 2004-04-26 | 2005-01-26 | 清华大学 | Anaerobic reactor for processing waste water containing high concentration suspended solid |
| CN102583732A (en) * | 2012-03-19 | 2012-07-18 | 郑州大学 | High-efficiency anaerobic reaction device |
| CN204022633U (en) * | 2014-07-11 | 2014-12-17 | 广西益江环保科技有限责任公司 | A kind of residual sludge reduction treatment unit |
| CN105647608A (en) * | 2016-01-12 | 2016-06-08 | 东华大学 | Biogas desulfurization-drying-storage integrated device |
| CN105836880A (en) * | 2016-05-31 | 2016-08-10 | 陕西科技大学 | ASBR (anaerobic sequencing batch reactor) |
| CN107601664A (en) * | 2017-10-30 | 2018-01-19 | 北京建工金源环保发展股份有限公司 | New Cycle bulking sludge bed anaerobic reactor |
-
2019
- 2019-05-15 CN CN201910400772.7A patent/CN110002584B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2190113Y (en) * | 1994-05-28 | 1995-02-22 | 河北轻化工学院 | Reactor with anaerobic sludge bed |
| CN1569687A (en) * | 2004-04-26 | 2005-01-26 | 清华大学 | Anaerobic reactor for processing waste water containing high concentration suspended solid |
| CN102583732A (en) * | 2012-03-19 | 2012-07-18 | 郑州大学 | High-efficiency anaerobic reaction device |
| CN204022633U (en) * | 2014-07-11 | 2014-12-17 | 广西益江环保科技有限责任公司 | A kind of residual sludge reduction treatment unit |
| CN105647608A (en) * | 2016-01-12 | 2016-06-08 | 东华大学 | Biogas desulfurization-drying-storage integrated device |
| CN105836880A (en) * | 2016-05-31 | 2016-08-10 | 陕西科技大学 | ASBR (anaerobic sequencing batch reactor) |
| CN107601664A (en) * | 2017-10-30 | 2018-01-19 | 北京建工金源环保发展股份有限公司 | New Cycle bulking sludge bed anaerobic reactor |
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