CN103708613B - System and method for recycling toilet flushing sewage energy through industrial circulating water afterheat - Google Patents
System and method for recycling toilet flushing sewage energy through industrial circulating water afterheat Download PDFInfo
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- CN103708613B CN103708613B CN201310706357.7A CN201310706357A CN103708613B CN 103708613 B CN103708613 B CN 103708613B CN 201310706357 A CN201310706357 A CN 201310706357A CN 103708613 B CN103708613 B CN 103708613B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention relates to a sewage treatment system and method and particularly relates to a system and a method for recycling toilet flushing sewage energy through industrial circulating water afterheat. In order to solve the pretreatment problem of high-concentration organic matters in toilet flushing sewage after flow splitting of domestic sewage and wastewater in industrial factory districts and the further utilization problem of low-quality afterheat in industrial circulating water systems, an industrial circulating water treatment system and a domestic sewage pretreatment system are improved and coupled. Circulating hot water is used as a heat source, anaerobic digestion operation parameters are regulated by an automatic control system in real time, the reaction is controlled at a methane generation stage, and power is generated by a bio-gas generator so as to synchronously recycle the energy source in the domestic sewage and utilize the generated electric energy, thereby providing a new way for indirect utilization of low-quality afterheat in the industrial circulating water systems.
Description
Technical field
The present invention relates to a kind of New Type of Sewage Treatment System and method, be specifically related to a kind of System and method for utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy.
Background technology
Since entering 21 century, what require due to cleaner production improves constantly, field of industrial production, and the technological innovation of energy development is maked rapid progress.Be different from traditional fossil class energy (oil, coal etc.), photovoltaic, wind-force, biomass energy, because of its green, free of contamination characteristic, are leading the energy revolution that new.This wherein, the potentiality to be exploited of biomass energy is huge, remarkably influenced the whole world carbon cycle.
With the fast development of wastewater treatment in China industry, " dirty, useless separate system " is the development trend of industrial working, covil construction run-off system.Be different from the sanitary sewage of dirt, the discharge of useless interflow, the sanitary sewage of flushing the toilet of independent discharge is made up of urine, ight soil wash-down water, be rich in a large amount of biodegradable organism and nutrition, being applicable to adopting bio anaerobic process, is the methanogenic desirable matrix of anaerobic digestion.Often the water yield is little for such sewage simultaneously, and when entering separately septic tank, everyone is about 15-20L by sewage quantity every day, and therefore impacting less to the water yield of biochemical reaction system, is potential energy donor.
As shown in Figure 1, at present in industrial working, great majority flush the toilet sanitary sewage often only after simple septic tank stops, and directly enter municipal wastewater pipe network, not only increase the load of municipal wastewater process, its potential energy source does not obtain effective exploitation and utilization yet.Septic tank is as the simplest anerobic sowage biological treatment, have a long history, but it is often only hydrolyzed to the high-enriched organics in sanitary sewage by the effect of anaerobion, acidifying, larger molecular organics is changed into low molecular short chain organism, be difficult to the stable organic produce biogas (effective ingredient is methane) that realizes and react.
Therefore, existing simple anaerobic treatment is transformed, following industry development trend may be become by the carbon source in methane-generating pit process exploitation sewage with the energy reclaimed in sanitary sewage.Methanogen is a class temperature sensitivity bacterium, and for the sanitary sewage that concentration of narmful substance is lower, temperature of reaction is the most important factor affecting its metabolism, and research shows that 35-55 DEG C is best envrionment temperature.In actual motion, due to the natural trend of weather, under cryogenic, often need to carry out Heat artificially to methane-generating pit.Find effective thermal source and become with the ideal temperature maintained needed for methane phase reaction the key issue being realized sewage energy recovery by methane-generating pit technique.
On the other hand, be different from common civil buildings, because of need of production in industrial working, a large amount of cooling circulating water of normal needs, is done industrial " lifeline " by analogy.Generally speaking, the circulating hot water temperature of heat-exchange equipment generation is mostly at 35-70 DEG C.And directly cannot to send back in production process because its temperature is lower lower than the low temperature heat energy of the hot water of 40 DEG C and be used, mostly carried out heat exchange by cooling tower and air and be discharged, cooling tower and back water pump are the main carriers of power consumption.Existing waste heat of industrial circulating water utilizes, mostly rest on the direct utilization of waste heat itself, such as: absorption system (as lithium bromide absorption type heat pump), adsorptive refrigeration technology, type material technology (thermoelectric material thermo-electric generation), hot pipe technique, thermo-acoustic technology etc., relative merits are not quite similar.But, this part of waste heat is carried out indirect utilization, does not also occur the carrier that is coupled preferably at present.
The Chinese patent that application number is 201120061193.3, name is called a kind of biological treatment device of toilet flushing sewage, the Chinese patent that application number is 201010609350.X, title is domestic sewage zero emission treatment and system thereof discloses the biological treatment of toilet-flushing sewage, but the same with other prior aries, to the recovery of toilet-flushing sewage energy, aspect Shortcomings is utilized to waste heat of industrial circulating water.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and a kind of System and method for utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy is provided, industrial circulation water treatment system and sanitary sewage pretreatment system are carried out improveing and being coupled, provide the new outlet of low-quality waste heat indirect utilization in industrial circulating water system, synchronously realize the recovery of the energy in sanitary sewage and the utilization of institute's electrogenesis energy.
The present invention's adopted technical scheme that solves the problem is:
Utilize waste heat of industrial circulating water to reclaim a system for toilet-flushing sewage energy, this system is connected with outdoor water supply pipe net, outdoor drainage pipe network, utensil of flushing the toilet; This system comprises heat-exchange equipment, cooling tower; It is characterized in that: this system also comprises sewage equalizing tank, variable valve, methane-generating pit, biogas generator, intermediate water tank, PLC, heat pipe, alkali liquid tank, chemicals feed pump, water cooling pond, back water pump, resistance to thermal valve;
Outdoor water supply pipe net, utensil of flushing the toilet, sewage equalizing tank, variable valve, methane-generating pit, outdoor drainage pipe network are connected successively; The built-in temperature sensor of sewage equalizing tank; Built-in No. two temperature sensors of methane-generating pit, pH sensor; Alkali liquid tank, chemicals feed pump, methane-generating pit are connected successively;
Outdoor water supply pipe net, heat-exchange equipment, intermediate water tank, cooling tower, outdoor drainage pipe network are connected; Cooling tower, water cooling pond, back water pump, heat-exchange equipment are connected successively; Heat pipe one end is connected with intermediate water tank, and the other end is connected with methane-generating pit, and heat pipe is provided with resistance to thermal valve;
The biogas relief outlet of methane-generating pit and biogas generator are connected; Described biogas generator is connected with cooling tower, back water pump;
PLC is connected with variable valve, chemicals feed pump, temperature sensor, No. two temperature sensors, pH sensor, resistance to thermal valves respectively.
The present invention is provided with shore pipe bottom described methane-generating pit, and shore pipe is provided with mud valve.
Agitator is provided with in methane-generating pit of the present invention.
Adopt the waste heat of industrial circulating water that utilizes of said system to reclaim a method for toilet-flushing sewage energy, comprise three steps:
(1), utensil of flushing the toilet produce sanitary sewage enter sewage equalizing tank, PLC open variable valve, sanitary sewage enters methane-generating pit from sewage equalizing tank; Meanwhile, the excess sludge that municipal wastewater process is discharged is dropped in methane-generating pit; The sludge retention time controlled in methane-generating pit is 25-30d, sludge concentration is 10000-15000mg/L; The open degree of regulating and controlling valve, to maintain hydraulic detention time in methane-generating pit for 15-25d;
(2), produce cold water through heat-exchange equipment heating after produce hot water enter intermediate water tank, the heat of hot water is passed to the muddy water mixed solution in methane-generating pit by heat pipe; The temperature T in sewage equalizing tank is monitored respectively by a temperature sensor and No. two temperature sensors
1with the temperature T in methane-generating pit
2; PLC carrys out the open degree of regulating and controlling valve to maintain T according to the temperature information of a temperature sensor and No. two temperature sensors
2for 35-55 DEG C; According to the monitoring information of pH sensor, PLC regularly opens chemicals feed pump to maintain pH>=6.8 in methane-generating pit;
Work as T
2during < 35 DEG C, temperature information is passed to PLC by No. two temperature sensors, and PLC makes feedback, reduces the open degree of variable valve; If T
2all the time < 35 DEG C, then PLC regulating and controlling valve makes it cut out; Work as T
2when again>=36 DEG C, PLC regulating and controlling valve is opened;
As pH < 6.8, information is passed to PLC by pH sensor, and PLC makes feedback, opens chemicals feed pump, and the NaOH solution in alkali liquid tank enters in methane-generating pit; When behind pH >=7.2, close chemicals feed pump;
Work as T
1> T
2time, PLC makes feedback, closes resistance to thermal valve, cuts off heat trnasfer;
(3), the biogas that produces in methane-generating pit is delivered to biogas generator, and biogas is converted into electric energy for producing and living used by biogas generator; Cooling tower cools being transmitted the hot water come by intermediate water tank, is stored in water cooling pond; Cold water in water cooling pond is delivered to heat-exchange equipment by back water pump;
In step () and step (two), when the hydraulic detention time in methane-generating pit is 15-25d and temperature T
2for 35-55 DEG C of two conditions cannot meet simultaneously time, regulate the open degree of variable valve, preferential satisfied temperature T
2for 35-55 DEG C.
In step of the present invention (), the sludge retention time controlled in methane-generating pit is 25d, sludge concentration is 12000mg/L.
In step of the present invention (), the open degree of regulating and controlling valve, to maintain hydraulic detention time in methane-generating pit for 20d.
In step of the present invention (two), the open degree of PLC regulating and controlling valve is to maintain T
2it is 37 DEG C.
The present invention in step () and step (two), when the hydraulic detention time in methane-generating pit is 20d and temperature T
2be 37 DEG C of two conditions when cannot simultaneously meet, regulate the open degree of variable valve, preferential satisfied temperature T
2it is 37 DEG C.
After the present invention is directed to industrial working implementation life dirt, effluent segregation, to flush the toilet the organic problem of pretreatment of sanitary sewage middle and high concentration, and the further Utilizing question of low-quality waste heat in industrial circulating water system, industrial circulation water treatment system and sanitary sewage pretreatment system are carried out improveing and being coupled.Using circulating hot water as thermal source, anaerobic digestion operating parameter is regulated in real time by automatic control system, by reaction controlling in the methane phase stage, and utilize biogas generator to generate electricity, synchronously realize the recovery of the energy in sanitary sewage and the utilization of institute's electrogenesis energy, for the indirect utilization of waste heat low-quality in industrial circulating water system provides new outlet.The present invention compared with prior art, has the following advantages and effect:
The easy degradation biological energy of 1, flushing the toilet in sanitary sewage is extracted efficiently and utilizes, and significantly reduces difficulty and the energy consumption of follow-up sewage disposal simultaneously.
2, waste heat of industrial circulating water is by indirect utilization, and circulating hot water, as suitable heating source, maintains the envrionment temperature needed for sewage anaerobic digestion, ensure that the efficient of reaction and stablize to carry out.
3, the generating of saprobia matter is clean, pollution-free, in scale one timing, can realize the self-sufficiency of industrial working energy system.
4, the present invention is comparatively simple for the transformation of existing industrial working, and industrial cycle hot water, except providing waste heat for anaerobic digestion, still can carry out later use.
Accompanying drawing explanation
Fig. 1 is factory's toilet-flushing sewage process and the industrial circulation water treatment schematic flow sheet of prior art.
Fig. 2 is the structural representation that system that the embodiment of the present invention utilizes waste heat of industrial circulating water to reclaim toilet-flushing sewage energy is connected with outdoor water supply pipe net, outdoor drainage pipe network, utensil of flushing the toilet.
In figure: 1-outdoor water supply pipe net, the indoor living water supply pipe of 2-, 3-flushes the toilet utensil, 4-sanitary sewer, 5-sewage equalizing tank, 6-variable valve, 7-methane-generating pit, 8-No. bis-temperature sensors, 9-agitator, 10-gas-collecting pipe, 11-water shoot, 12-biogas generator, 13-outdoor drainage pipe network, 14-indoor production water service pipe, 15-heat-exchange equipment, 16-hot-water line, 17-intermediate water tank, 18-temperature sensor, 19-electric wire, 20-PLC controller, 21-heat pipe, 22-cooling tower, 23-circulating cooling water pipe, 24-cable, 25-shore pipe, 26-alkali liquid tank, 27-chemicals feed pump, 28-chemical feed pipe, 29-pH sensor, 30-water cooling pond, 31-back water pump, 32-mud valve, the resistance to thermal valve of 33-.
Embodiment
Below in conjunction with accompanying drawing, also by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
See Fig. 2, a kind of system utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy of the embodiment of the present invention, comprises domestic sewage processing system of flushing the toilet, industrial production circulating water system, marsh gas power generation and utilization of power system.
To flush the toilet domestic sewage processing system: outdoor water supply pipe net 1 is connected with utensil 3 of flushing the toilet by indoor living water supply pipe 2, flush the toilet utensil 3, sewage equalizing tank 5, variable valve 6, methane-generating pit 7 is connected successively by sanitary sewer 4, and methane-generating pit 7 is connected by water shoot 11 and outdoor drainage pipe network 13.
The built-in temperature sensor of sewage equalizing tank 5 18, temperature sensor 18 is connected with PLC 20 by electric wire 19.
Built-in No. two temperature sensors 8 of methane-generating pit 7, pH sensor 29, agitator 9, heat pipe 21 one end.No. two temperature sensors 8 are all connected with PLC 20 by electric wire 19 with pH sensor 29.Connect bottom methane-generating pit 7 and have shore pipe 25, shore pipe 25 is provided with mud valve.Methane-generating pit 7 top, chemicals feed pump 27, alkali liquid tank 26 are connected successively by chemical feed pipe 28.
For amount of substance amount concentration is the NaOH solution of 0.5mol/L in alkali liquid tank 26.
Variable valve 6 is connected with PLC 20 by electric wire 19.
Chemicals feed pump 27 is connected with PLC 20 by electric wire 19.
Industrial production circulating water system: outdoor water supply pipe net 1 is connected by indoor production water service pipe 14 and heat-exchange equipment 15, heat-exchange equipment 15, intermediate water tank 17, cooling tower 22 are connected successively by hot-water line 16, and cooling tower 22 is connected by water shoot 11 and outdoor drainage pipe network 13.
Cooling tower 22, water cooling pond 30, back water pump 31, heat-exchange equipment 15 are connected successively by circulating cooling water pipe 23.
The other end of intermediate water tank 17 built-in heat conducting pipe 21, heat pipe 21 is provided with resistance to thermal valve 33.Resistance to thermal valve 33 is connected with PLC 20 by electric wire 19.
Marsh gas power generation and utilization of power system: biogas relief outlet is established at methane-generating pit 7 top, biogas relief outlet is connected by gas-collecting pipe 10 and biogas generator 12.Biogas generator 12 is connected with cooling tower 22, back water pump 31 respectively by cable 24.
Based on said system, a kind of method utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy of the present invention, its principle is:
Toilet-flushing sewage treatment system is coupled with industrial production circulating water system, using the hot water in industrial circulating water system as thermal source, utilize the humidity control system be made up of temperature sensor, discharge of sewage variable valve, PLC to control water temperature in methane-generating pit, the anaerobic digestion for sanitary sewage of flushing the toilet provides suitable outside temperature environment.By controlling the parameter such as pH value, hydraulic detention time, sludge retention time, sludge concentration of methane-generating pit, the final product of anaerobic digestion is controlled as methane.Biogas generator using methane concentration be the biogas of 50-70% as matrix, generating be converted into electric energy for the current consuming apparatus such as cooling tower, back water pump, synchronously realize sewage energy recovery and industrial circulating water system energy-autarchic.
The method specifically comprises three steps:
(1), utensil 3 of flushing the toilet produce sanitary sewage enter sewage equalizing tank 5 by sanitary sewer 4, PLC 20 opens variable valve 6, and sanitary sewage enters methane-generating pit 7 from sewage equalizing tank 5, and turn on agitator 9 stirs.Meanwhile, excess sludge municipal wastewater process discharged drops in methane-generating pit 7, regularly opens mud valve 32; Discharge the excess sludge in methane-generating pit 7 by shore pipe 25, the sludge retention time controlled in methane-generating pit 7 is 25-30d, sludge concentration is 10000-15000mg/L, under this parameter, methane phase reaction effect is better; Optimization, in the present embodiment, the sludge retention time controlled in methane-generating pit 7 is 25d, sludge concentration is 12000mg/L.The open degree of regulating and controlling valve 6, to maintain hydraulic detention time in methane-generating pit 7 for 15-25d, under this parameter, methane phase reaction effect is better; Optimize, in the present embodiment, the hydraulic detention time maintained in methane-generating pit 7 is 20d.
(2) hot water, producing cold water generation after heat-exchange equipment 15 heats enters intermediate water tank 17.The heat of hot water is passed to the muddy water mixed solution in methane-generating pit 7 by the built-in heat pipe 21 of intermediate water tank 17.By the temperature T in a temperature sensor 18 and No. two temperature sensor 8 difference on-line monitoring sewage equalizing tanks 5
1with the temperature T in methane-generating pit 7
2; PLC 20 carrys out the open degree of regulating and controlling valve 6 to maintain T according to the temperature information of a temperature sensor 18 and No. two temperature sensors 8
2for 35-55 DEG C, under this parameter, methane phase reaction effect is better.According to the on-line monitoring information of pH sensor 29, PLC 20 regularly opens chemicals feed pump 27 to maintain pH >=6.8 in methane-generating pit 7, and under this parameter, methane phase reaction effect is better.Optimize, in the present embodiment, the open degree of PLC 20 regulating and controlling valve 6 is to maintain T
2it is 37 DEG C.
Work as T
2during < 35 DEG C, temperature information is passed to PLC 20 by No. two temperature sensors 8, and PLC 20 makes feedback, reduces the open degree of variable valve 6; If T
2all the time < 35 DEG C, then PLC 20 regulating and controlling valve 6 makes it cut out; Work as T
2when again>=36 DEG C, PLC 20 regulating and controlling valve 6 is opened.
As pH < 6.8, information is passed to PLC 20 by pH sensor 29, and PLC 20 makes feedback, opens chemicals feed pump 27, and the NaOH solution in alkali liquid tank 26 enters in methane-generating pit 7 by chemical feed pipe 28; When behind pH >=7.2, close chemicals feed pump 27.
Work as T
1> T
2time, PLC 20 makes feedback, closes resistance to thermal valve 33, cuts off heat trnasfer.
(3), the biogas produced in methane-generating pit 7 is delivered to biogas generator 12 by gas-collecting pipe 10, and biogas is converted into electric energy for producing and living used by biogas generator 12, has reclaimed the energy of toilet-flushing sewage; The electric energy that biogas generator 12 produces is delivered to cooling tower 22 and back water pump 31 by cable 24.Cooling tower 22 utilizes electric energy work, cooling, being stored in water cooling pond 30 by transmitting by hot-water line 16 hot water come by intermediate water tank 17.Back water pump 31 utilizes electric energy work, by circulating cooling water pipe 23, the cold water in water cooling pond 30 is delivered to heat-exchange equipment 15.
In step () and step (two), when the hydraulic detention time in methane-generating pit 7 is 15-25d and temperature T
2for 35-55 DEG C of two conditions cannot meet simultaneously time, regulate the open degree of variable valve 6, preferential satisfied temperature T
2for 35-55 DEG C.In the present embodiment, when the hydraulic detention time in methane-generating pit 7 is 20d and temperature T
2be 37 DEG C of two conditions when cannot simultaneously meet, regulate the open degree of variable valve 6, preferential satisfied temperature T
2it is 37 DEG C.
Case: adopt the sanitary sewage (BOD that flushes the toilet that the present embodiment process factory (scale is 2 classes/d, 500 people/class) discharges separately
5=1367.8 mg/L).After normal operation, year processes sanitary sewage 0.73 ten thousand t that flushes the toilet, and producing methane quantity per year is 1.3 ten thousand m
3, annual electricity generating capacity 2.3 ten thousand kwh.
In addition, it should be noted that, the specific embodiment described in this specification sheets, the shape, institute's title of being named etc. of its parts and components can be different, and the above content described in this specification sheets is only to structure example of the present invention explanation.
Claims (8)
1. utilize waste heat of industrial circulating water to reclaim a system for toilet-flushing sewage energy, this system is connected with outdoor water supply pipe net, outdoor drainage pipe network, utensil of flushing the toilet; This system comprises heat-exchange equipment, cooling tower; It is characterized in that: this system also comprises sewage equalizing tank, variable valve, methane-generating pit, biogas generator, intermediate water tank, PLC, heat pipe, alkali liquid tank, chemicals feed pump, water cooling pond, back water pump and resistance to thermal valve;
Outdoor water supply pipe net, utensil of flushing the toilet, sewage equalizing tank, variable valve, methane-generating pit, outdoor drainage pipe network are connected successively; The built-in temperature sensor of sewage equalizing tank; Built-in No. two temperature sensors of methane-generating pit and pH sensor; Alkali liquid tank, chemicals feed pump, methane-generating pit are connected successively;
Outdoor water supply pipe net, heat-exchange equipment, intermediate water tank, cooling tower, outdoor drainage pipe network are connected successively; Cooling tower, water cooling pond, back water pump, heat-exchange equipment are connected successively; Heat pipe one end is connected with intermediate water tank, and the other end is connected with methane-generating pit, and heat pipe is provided with resistance to thermal valve;
The biogas relief outlet of methane-generating pit and biogas generator are connected; Described biogas generator is connected with cooling tower, back water pump;
PLC is connected with variable valve, chemicals feed pump, temperature sensor, No. two temperature sensors, pH sensor, resistance to thermal valves respectively.
2. the system utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy according to claim 1, is characterized in that: bottom described methane-generating pit, be provided with shore pipe, shore pipe is provided with mud valve.
3. the system utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy according to claim 1, is characterized in that: be provided with agitator in described methane-generating pit.
4. adopt the waste heat of industrial circulating water that utilizes of system described in the arbitrary claim of claims 1 to 3 to reclaim a method for toilet-flushing sewage energy, it is characterized in that: comprise three steps:
(1), utensil of flushing the toilet produce sanitary sewage enter sewage equalizing tank, PLC open variable valve, sanitary sewage enters methane-generating pit from sewage equalizing tank; Meanwhile, the excess sludge that municipal wastewater process is discharged is dropped in methane-generating pit; The sludge retention time controlled in methane-generating pit is 25-30d, sludge concentration is 10000-15000mg/L; The open degree of regulating and controlling valve, to maintain hydraulic detention time in methane-generating pit for 15-25d;
(2), produce cold water through heat-exchange equipment heating after produce hot water enter intermediate water tank, the heat of hot water is passed to the muddy water mixed solution in methane-generating pit by heat pipe; The temperature T in sewage equalizing tank is monitored respectively by a temperature sensor and No. two temperature sensors
1with the temperature T in methane-generating pit
2; PLC carrys out the open degree of regulating and controlling valve to maintain T according to the temperature information of a temperature sensor and No. two temperature sensors
2for 35-55 DEG C; According to the monitoring information of pH sensor, PLC regularly opens chemicals feed pump to maintain pH>=6.8 in methane-generating pit;
Work as T
2during < 35 DEG C, temperature information is passed to PLC by No. two temperature sensors, and PLC makes feedback, reduces the open degree of variable valve; If T
2all the time < 35 DEG C, then PLC regulating and controlling valve makes it cut out; Work as T
2when again>=36 DEG C, PLC regulating and controlling valve is opened;
As pH < 6.8, information is passed to PLC by pH sensor, and PLC makes feedback, opens chemicals feed pump, and the NaOH solution in alkali liquid tank enters in methane-generating pit; When behind pH >=7.2, close chemicals feed pump;
Work as T
1> T
2time, PLC makes feedback, closes resistance to thermal valve, cuts off heat trnasfer;
(3), the biogas that produces in methane-generating pit is delivered to biogas generator, and biogas is converted into electric energy for producing and living used by biogas generator; Cooling tower cools being transmitted the hot water come by intermediate water tank, is stored in water cooling pond; Cold water in water cooling pond is delivered to heat-exchange equipment by back water pump;
In step () and step (two), when the hydraulic detention time in methane-generating pit is 15-25d and temperature T
2for 35-55 DEG C of two conditions cannot meet simultaneously time, regulate the open degree of variable valve, preferential satisfied temperature T
2for 35-55 DEG C.
5. the method utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy according to claim 4, is characterized in that: in step (), and the sludge retention time controlled in methane-generating pit is 25d, sludge concentration is 12000mg/L.
6. the method utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy according to claim 4, is characterized in that: in step (), the open degree of regulating and controlling valve, to maintain hydraulic detention time in methane-generating pit for 20d.
7. the method utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy according to claim 4, it is characterized in that: in step (two), the open degree of PLC regulating and controlling valve is to maintain T
2it is 37 DEG C.
8. the method utilizing waste heat of industrial circulating water to reclaim toilet-flushing sewage energy according to claim 4, is characterized in that: in step () and step (two), when the hydraulic detention time in methane-generating pit is 20d and temperature T
2be 37 DEG C of two conditions when cannot simultaneously meet, regulate the open degree of variable valve, preferential satisfied temperature T
2it is 37 DEG C.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101062825A (en) * | 2007-04-19 | 2007-10-31 | 浙江大学 | Rubbish comprehensive processing method adapted for village and small town |
| CN201141666Y (en) * | 2007-08-28 | 2008-10-29 | 深圳市兴隆源科技发展有限公司 | Renewable energy source air conditioning system |
| CN202508961U (en) * | 2011-11-22 | 2012-10-31 | 北京中持绿色能源环境技术有限公司 | Comprehensive utilization system of sludge classification split-phase anaerobic digestion and waste heat of marsh gas power generating set |
| CN203683221U (en) * | 2013-12-20 | 2014-07-02 | 中国联合工程公司 | System for recycling toilet flushing sewage energy by use of industrial circulating water afterheat |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009045612A (en) * | 2007-07-20 | 2009-03-05 | Chugoku Electric Power Co Inc:The | Waste recycling method and recycling facility |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101062825A (en) * | 2007-04-19 | 2007-10-31 | 浙江大学 | Rubbish comprehensive processing method adapted for village and small town |
| CN201141666Y (en) * | 2007-08-28 | 2008-10-29 | 深圳市兴隆源科技发展有限公司 | Renewable energy source air conditioning system |
| CN202508961U (en) * | 2011-11-22 | 2012-10-31 | 北京中持绿色能源环境技术有限公司 | Comprehensive utilization system of sludge classification split-phase anaerobic digestion and waste heat of marsh gas power generating set |
| CN203683221U (en) * | 2013-12-20 | 2014-07-02 | 中国联合工程公司 | System for recycling toilet flushing sewage energy by use of industrial circulating water afterheat |
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