CN111995194A - System for recovering heat of biochemical treatment garbage leachate - Google Patents
System for recovering heat of biochemical treatment garbage leachate Download PDFInfo
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- CN111995194A CN111995194A CN202010940160.XA CN202010940160A CN111995194A CN 111995194 A CN111995194 A CN 111995194A CN 202010940160 A CN202010940160 A CN 202010940160A CN 111995194 A CN111995194 A CN 111995194A
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- 239000007788 liquid Substances 0.000 claims abstract description 68
- 239000000149 chemical water pollutant Substances 0.000 claims abstract description 31
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000001694 spray drying Methods 0.000 claims abstract description 25
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 239000000428 dust Substances 0.000 claims description 47
- 238000004064 recycling Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 238000004065 wastewater treatment Methods 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 25
- 238000000034 method Methods 0.000 description 14
- 238000001816 cooling Methods 0.000 description 11
- 239000003507 refrigerant Substances 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
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- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003851 biochemical process Effects 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
Abstract
The invention provides a system for recovering heat of biochemical treatment landfill leachate, which comprises: the biochemical tank is used for treating the landfill leachate; the water-water heat pump unit is communicated with the biochemical pool through a mixed liquid conveying pipeline; the concentrated solution storage pool is used for storing the concentrated solution of the landfill leachate after advanced treatment; the concentrated solution storage tank is communicated with the water-water heat pump unit through a concentrated solution conveying pipeline; the mixed liquid in the biochemical pool and the concentrated solution in the concentrated solution storage pool exchange heat in the water-water heat pump unit; and the high-speed centrifugal spray drying tower is used for carrying out solid-liquid separation on the concentrated solution after heat exchange so as to remove the salt in the concentrated solution. The system for recovering the heat of the biochemical treatment landfill leachate realizes the recovery and utilization of the heat of the mixed liquid in the biochemical pond, and saves the energy consumption cost of wastewater treatment; and the salt in the concentrated solution can be removed, the continuous accumulation of substances such as salt and the like in the biochemical treatment tank is avoided, and the treatment effect of the biochemical treatment system is improved.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a system for recovering heat of biochemical treatment garbage leachate.
Background
The landfill leachate belongs to high-concentration wastewater which is difficult to treat, and is generally treated by adopting a mode of pretreatment, biochemical treatment and advanced treatment. Because the concentration of the organic matters in the influent water of the landfill leachate is high, a large amount of heat energy is generated in biochemical treatment, so that the water temperature of muddy water mixed liquor in a biochemical pool rises, particularly in summer, the water temperature can reach more than 40 ℃, and the effect of the biochemical treatment is seriously influenced, so that the current mainstream mode is to adopt a plate heat exchanger and a cooling tower mode for cooling, when the temperature of the mixed liquor in the biochemical pool is higher than 37 ℃, the plate heat exchanger and the cooling tower are started for cooling, and when the temperature of the mixed liquor in the biochemical pool is lower than 32 ℃, the cooling is stopped; the specific cooling operation method comprises the following steps: the sewage pump is used for pumping the high-temperature mixed liquid in the biochemical water tank into the plate heat exchanger, meanwhile, the clean water at the bottom of the cooling tower is pumped into the plate heat exchanger by the clean water pump, so that heat in the high-temperature mixed liquid is exchanged for clean water, the cooled mixed liquid returns to the biochemical water tank, the heated clean water returns to the top of the cooling tower to be sprayed and cooled down, the clean water is pumped into the plate heat exchanger by the clean water pump at the bottom of the cooling tower, and the operation is repeated, so that the heat of the mixed liquid in the biochemical water tank is radiated into the environment through the heat exchange and the cooling tower. Although the method can effectively reduce the temperature of the mixed liquid in the biochemical pool and ensure the normal biochemical process, the method has two defects: 1. the heat energy is not recycled, but is radiated to the environment, so that resources are wasted; 2. the cooling method needs to consume more electric energy additionally, and is not energy-saving.
On the other hand, the current advanced treatment of landfill leachate generally adopts an NF/RO membrane treatment process, a certain amount of concentrated solution is generated, if the concentrated solution is treated in a recharging or backflow mode, the concentrated solution can continuously return to a biochemical treatment system, so that the continuous accumulation of substances such as salt and the like is caused, and the treatment effect of the biochemical treatment system is seriously influenced, therefore, the concentrated solution must be effectively treated, the concentrated solution is treated by an evaporation process generally at present, and the evaporation process also needs to additionally consume a large amount of heat energy (such as steam and electric energy), so that the energy consumption cost of wastewater treatment is further increased.
Disclosure of Invention
The invention aims to provide a system for recovering heat of biochemical treatment garbage percolate, aiming at the defects of the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a system for recovering heat of biochemical treatment landfill leachate comprises:
the biochemical tank is used for treating the landfill leachate;
the water-water heat pump unit is communicated with the biochemical pool through a mixed liquid conveying pipeline;
the concentrated solution storage pool is used for storing the concentrated solution of the landfill leachate after advanced treatment; the concentrated solution storage tank is communicated with the water-water heat pump unit through a concentrated solution conveying pipeline; the mixed liquid in the biochemical pool and the concentrated liquid in the concentrated liquid storage pool exchange heat in the water-water heat pump unit; and the high-speed centrifugal spray drying tower is used for carrying out solid-liquid separation on the concentrated solution after heat exchange so as to remove the salt in the concentrated solution.
Preferably, the device further comprises a dust removal device, and the dust removal device is communicated with the gas outlet of the high-speed centrifugal spray drying tower.
Preferably, the dust removing device comprises a cyclone dust collector and a bag-type dust collector which are sequentially connected in series, a gas outlet of the high-speed centrifugal spray drying tower is communicated with a gas inlet of the cyclone dust collector, and a gas outlet of the cyclone dust collector is communicated with a gas inlet of the bag-type dust collector.
Preferably, the air-air heat pump unit is further included, the air-air heat pump unit is communicated with a gas outlet of the bag-type dust remover and a gas inlet of the high-speed centrifugal spray drying tower, and cold air and gas which is dedusted by the bag-type dust remover perform heat exchange in the air-air heat pump unit.
Preferably, the water-water heat pump unit comprises a first evaporator, a first condenser, a first compressor and a first throttle valve; the mixed liquid in the biochemical pool enters the first evaporator and then is cooled, and the concentrated liquid in the concentrated liquid storage pool enters the first condenser and then is heated.
Preferably, the air-air heat pump unit comprises a second evaporator, a second condenser, a second compressor and a second throttle valve; and the gas dedusted by the bag-type dust remover enters the second evaporator to be cooled and condensed, and the cold air enters the second condenser to be heated.
Preferably, a mixed liquid pump is arranged on the mixed liquid conveying pipeline, and the mixed liquid in the biochemical pond is conveyed into the water-water heat pump unit through the mixed liquid pump.
Preferably, a concentrated liquid pump is arranged on the concentrated liquid conveying pipeline, and concentrated liquid in the concentrated liquid storage tank is conveyed into the water-water heat pump unit through the concentrated liquid pump.
Compared with the prior art, the invention has the beneficial effects that:
according to the system for recovering the heat of the biochemical treatment landfill leachate, the heat of the mixed liquid in the biochemical pond is recovered by the water-water heat pump unit and then the evaporated concentrated solution is heated, so that the temperature of the mixed liquid in the biochemical pond is reduced, the purpose of heating the evaporated concentrated solution is achieved, the heat of the mixed liquid in the biochemical pond is recovered, and the energy consumption cost of wastewater treatment is saved. On the other hand, the system for recovering the heat of the biochemical treatment garbage leachate removes the salt in the concentrated solution through the high-speed centrifugal spray drying tower, avoids the continuous accumulation of substances such as salt and the like in the biochemical treatment tank, and improves the treatment effect of the biochemical treatment system.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present invention are not limited to the specific details set forth above, and that these and other objects that can be achieved with the present invention will be more clearly understood from the detailed description that follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. Many aspects of the invention will be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention.
Fig. 1 is a schematic structural diagram of a system for recovering heat from biochemical treatment of landfill leachate according to embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a system for recovering heat from biochemical treatment of landfill leachate according to embodiment 2 of the present invention;
fig. 3 is a schematic structural diagram of a system for recovering heat from landfill leachate in biochemical treatment according to embodiment 3 of the present invention.
In the figure, 1, a biochemical pool, 2, a mixed liquid pump, 3, a first evaporator, 4, a first condenser, 5, a first compressor, 6, a first throttle valve, 7, a concentrated liquid pump, 8, a concentrated liquid storage pool, 9, a high-speed centrifugal spray drying tower, 10, a cyclone dust collector, 11, a bag-type dust collector, 12, a second evaporator, 13, a second condenser, 14, a second compressor, 15 and a second throttle valve.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts, or the same or similar steps.
It is to be understood that the processing equipment or apparatus not specifically identified in the following examples is conventional in the art.
Furthermore, it is to be understood that one or more method steps mentioned in the present invention does not exclude that other method steps may also be present before or after the combined steps or that other method steps may also be inserted between these explicitly mentioned steps, unless otherwise indicated; moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.
The design principle of the system for recovering the heat of the biochemical treatment landfill leachate is as follows: the heat of the mixed liquid in the biochemical pool mainly comes from the following aspects: 1. heat generated by biological treatment; 2. mechanical energy conducted to water by mechanical equipment matched with the biochemical pool; 3. external heat input (e.g., during hot summer). The COD of the general landfill leachate entering the biochemical pond is about 7000-10000 mg/L, and according to calculation, the heat generated by processing one ton of landfill leachate is about 504000KJ, and 0.15 ton of concentrated solution is generated at the same time. The heat required to heat up 0.15 tonne of concentrate from 30 c to evaporation is approximately 389100KJ, less than 504000 KJ. Therefore, the heat generated by the mixed liquid in the biochemical pool is enough for evaporating the heat required by the concentrated liquid, and the purpose of recycling the heat energy is achieved.
Example 1
The embodiment 1 of the invention provides a system for recovering heat of biochemical treatment landfill leachate, and the structure of the system is shown in figure 1. A system for recovering heat of biochemical treatment garbage leachate comprises a biochemical tank 1, a water-water heat pump unit, a concentrated solution storage tank 8 and a high-speed centrifugal spray drying tower 9. The biochemical tank 1 is used for treating landfill leachate; the water-water heat pump unit is communicated with the biochemical pool 1 through a mixed liquid conveying pipeline, preferably, a mixed liquid pump 2 is arranged on the mixed liquid conveying pipeline, and the mixed liquid in the biochemical pool 1 is conveyed into the water-water heat pump unit through the mixed liquid pump 2; the concentrated solution storage tank 8 is used for storing concentrated solution of the landfill leachate after advanced treatment; the concentrated solution storage tank 8 is communicated with the water-water heat pump unit through a concentrated solution conveying pipeline, preferably, a concentrated solution pump 7 is arranged on the concentrated solution conveying pipeline, and concentrated solution in the concentrated solution storage tank 8 is conveyed into the water-water heat pump unit through the concentrated solution pump 7; the mixed liquid in the biochemical pool 1 and the concentrated liquid in the concentrated liquid storage pool 8 exchange heat in the water-water heat pump unit; the concentrated solution after heat exchange enters a high-speed centrifugal spray drying tower 9 for solid-liquid separation to remove salt in the concentrated solution. Wherein, the water-water heat pump unit preferably comprises a first evaporator 3, a first condenser 4, a first compressor 5 and a first throttle valve 6; the mixed liquid in the biochemical pool 1 enters the first evaporator 3 and then is cooled, and the cooled mixed liquid returns to the biochemical pool 1; the concentrate in the concentrate reservoir 8 is heated to 150 c (superheated) after entering the first condenser 4. The superheated concentrate is contacted with hot air in a high-speed centrifugal spray drying tower 9, and the water content of the concentrate is evaporated to produce a crystalline material having a water content of less than 5%. Large-particle crystallisate is trapped at the bottom of the drying tower, and other medium-particle and fine-particle crystallisate and water vapor are discharged out of the high-speed centrifugal drying tower 9 along with air. The large-particle crystallisate can be conveyed to a sundry storage tank through pneumatic equipment.
The specific heat exchange process in the water-water heat pump unit is as follows: the refrigerant is continuously compressed in the circulation line by the first compressor 5 into liquid in the first condenser 4 and then evaporated into gas in the first evaporator 3 by the action of the first throttle valve 6. The mixed liquid absorbs heat from the refrigerant evaporated in the first evaporator 3, thereby transferring heat energy to the refrigerant. The mixed liquid returns to the biochemical pool 1 after being cooled. The refrigerant absorbing a large amount of heat is evaporated to become a gas which is compressed by the first compressor 5 and enters the first condenser 4, and the refrigerant is condensed to a liquid in a high pressure state, and a large amount of heat is emitted to heat the concentrated solution entering the first condenser 4, thereby increasing the temperature of the concentrated solution. The high-temperature concentrated solution is sent to a high-speed rotating centrifugal atomizing disc arranged at the top of the high-speed centrifugal spray drying tower 9, under the centrifugal action of a rotating disc, the concentrated solution is stretched into a film on a rotating surface and continuously moves to the edge, and the film is atomized when leaving the edge, so that the moisture of the concentrated solution is evaporated, and crystalline substances with the moisture content lower than 5% are generated.
According to the system for recovering heat of the biochemical treatment landfill leachate, disclosed by the embodiment of the invention, the heat of the mixed liquid in the biochemical tank 1 is recovered by the water-water heat pump unit and then the evaporation concentrated solution is heated, so that the temperature of the mixed liquid in the biochemical tank 1 is reduced, the purpose of heating the evaporation concentrated solution is also achieved, the heat of the mixed liquid in the biochemical tank 1 is recycled, and the energy consumption cost of wastewater treatment is saved. On the other hand, the system for recovering the heat of the biochemical treatment garbage leachate removes the salt in the concentrated solution through the high-speed centrifugal spray drying tower 9, avoids the continuous accumulation of substances such as salt and the like in the biochemical treatment tank, and improves the treatment effect of the biochemical treatment system.
Example 2
Because the crystal and the water vapor of partial medium particles and fine particles are still discharged out of the high-speed centrifugal drying tower 9 along with the air in the embodiment 1, and the direct discharge of the dust-containing gas is not beneficial to the environmental protection and the health of the operators, as a further improvement to the embodiment 1, the system for recovering the heat of the biochemical treatment garbage leachate of the embodiment further comprises a dust removal device, and the dust removal device is communicated with the gas outlet of the high-speed centrifugal spray drying tower 9. Preferably, the dust removing device comprises a cyclone dust collector 10 and a bag-type dust collector 11 which are connected in series in sequence, a gas outlet of the high-speed centrifugal spray drying tower 9 is communicated with a gas inlet of the cyclone dust collector 10, a gas outlet of the cyclone dust collector 10 is communicated with a gas inlet of the bag-type dust collector 11, and the structure is shown in fig. 2. In this way, the dusty gas from the high-speed centrifugal spray drying tower 9 sequentially enters the cyclone dust collector 10 and the bag-type dust collector 11, and medium particles and fine particle crystals in the air are sequentially removed through the cyclone dust collector 10 and the bag-type dust collector 11. Large-particle crystallisates as well as medium-particle and fine-particle crystallisates can be conveyed to the impurity storage tank by pneumatic equipment. The clean gas after dust removal can be directly discharged into the air.
Example 3
The temperature of the clean gas after dust removal in embodiment 2 is usually higher, generally about 40-50 ℃, and the direct discharge to the air still causes the waste of this part of heat, therefore, as a further improvement to embodiment 2, the system for recovering the heat of the biochemical treatment landfill leachate of this embodiment further comprises an air-air heat pump unit, the air-air heat pump unit is communicated with the gas outlet of the bag-type dust remover 11 and the gas inlet of the high-speed centrifugal spray drying tower 9, and the cold air exchanges heat with the gas after dust removal by the bag-type dust remover 11 in the air-air heat pump unit. Preferably, the air-air heat pump unit comprises a second evaporator 12, a second condenser 13, a second compressor 14 and a second throttle valve 15; the gas dedusted by the bag-type dust collector 11 enters the second evaporator 12 and is cooled and condensed, the condensed liquid circularly flows back into the biochemical pool 1, the cold air enters the second condenser 13 and is heated, and the heated hot air enters the high-speed centrifugal spray drying tower 9 to realize the recycling of heat.
The specific heat exchange process in the air-air heat pump unit is as follows: the refrigerant is continuously compressed in the circulation line by the second compressor 14 into liquid in the second condenser 13 and then evaporated into gas in the second evaporator 12 by the action of the second throttle valve 15. The hot air absorbs heat from the evaporated refrigerant in the second evaporator 12, so that heat energy is transferred to the refrigerant, and meanwhile, the hot air is cooled, and water vapor in the air is condensed into water due to temperature reduction, and the water vapor is discharged into the biochemical pool 1 for treatment. Then the cold air enters a second condenser 13, refrigerant is condensed into liquid in the second condenser 13 under the action of a second compressor 14, a large amount of heat is released, the cold air is reheated, and then the cold air enters the high-speed centrifugal spray drying tower 9 again to dry the concentrated solution, and the circulation is continued. The concentrated solution is evaporated, and the formed crystal with the water content of less than 5 percent is intercepted at the bottom of a high-speed centrifugal spray drying tower 9, the bottom of a cyclone dust collector 10 and the bottom of a bag-type dust collector 11, and then is conveyed into a sundries storage tank by pneumatic equipment through a pipeline.
According to the embodiment of the invention, the water-water heat pump unit is used for recovering heat in the biochemical pool 1 to heat the concentrated solution, and the air-air heat pump unit is used for recovering heat of hot air and latent heat of water vapor to heat cold air and also recovering heat. The recovered heat is enough to be used for evaporating concentrated solution, evaporated moisture is condensed into water in a second evaporator 12 in the air-air heat pump unit and discharged to the biochemical pool 1 for treatment, and crystallized substances with the water content lower than 5% generated after evaporation are intercepted by the high-speed centrifugal spray drying tower 9, the cyclone dust collector 10 and the bag-type dust collector 11 and then are conveyed to a sundries storage tank by pneumatic equipment through pipelines, and are subsequently and properly transported. Thus the concentrated solution is effectively evaporated to remove salt impurities.
The protective scope of the present invention is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present invention by those skilled in the art without departing from the scope and spirit of the present invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (8)
1. The utility model provides a system for retrieve biochemical treatment landfill leachate heat which characterized in that includes:
the biochemical tank is used for treating the landfill leachate;
the water-water heat pump unit is communicated with the biochemical pool through a mixed liquid conveying pipeline;
the concentrated solution storage pool is used for storing the concentrated solution of the landfill leachate after advanced treatment; the concentrated solution storage tank is communicated with the water-water heat pump unit through a concentrated solution conveying pipeline; the mixed liquid in the biochemical pool and the concentrated liquid in the concentrated liquid storage pool exchange heat in the water-water heat pump unit; and
and (3) a high-speed centrifugal spray drying tower, wherein the concentrated solution after heat exchange enters the high-speed centrifugal spray drying tower for solid-liquid separation to remove salt in the concentrated solution.
2. The system for recovering heat of landfill leachate of biochemical treatment according to claim 1, further comprising a dust removal device, wherein the dust removal device is in communication with the gas outlet of the high-speed centrifugal spray drying tower.
3. The system for recovering heat of landfill leachate of biochemical treatment according to claim 2, wherein the dust removing device comprises a cyclone dust collector and a bag dust collector connected in series in sequence, the gas outlet of the high-speed centrifugal spray drying tower is communicated with the gas inlet of the cyclone dust collector, and the gas outlet of the cyclone dust collector is communicated with the gas inlet of the bag dust collector.
4. The system for recovering heat of landfill leachate during biochemical treatment according to claim 3, further comprising an air-air heat pump unit, wherein the air-air heat pump unit is communicated with a gas outlet of the bag-type dust remover and a gas inlet of the high-speed centrifugal spray drying tower, and cold air and gas dedusted by the bag-type dust remover perform heat exchange in the air-air heat pump unit.
5. The system for recovering heat of landfill leachate in biochemical treatment according to any one of claims 1 to 4, wherein the water-water heat pump unit comprises a first evaporator, a first condenser, a first compressor and a first throttle valve; the mixed liquid in the biochemical pool enters the first evaporator and then is cooled, and the concentrated liquid in the concentrated liquid storage pool enters the first condenser and then is heated.
6. The system for recycling heat of landfill leachate of biochemical treatment according to claim 4, wherein the air-air heat pump unit comprises a second evaporator, a second condenser, a second compressor and a second throttle valve; and the gas dedusted by the bag-type dust remover enters the second evaporator to be cooled and condensed, and the cold air enters the second condenser to be heated.
7. The system for recycling heat of leachate generated during biochemical treatment of garbage according to claim 1, wherein a mixed liquid pump is disposed on the mixed liquid transportation pipeline, and the mixed liquid in the biochemical pond is transported to the water-water heat pump unit through the mixed liquid pump.
8. The system for recycling heat of landfill leachate generated during biochemical treatment according to claim 1, wherein the concentrated solution delivery pipeline is provided with a concentrated solution pump, and the concentrated solution in the concentrated solution storage tank is delivered to the water-water heat pump unit through the concentrated solution pump.
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| CN202010940160.XA CN111995194A (en) | 2020-09-09 | 2020-09-09 | System for recovering heat of biochemical treatment garbage leachate |
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| CN202010940160.XA CN111995194A (en) | 2020-09-09 | 2020-09-09 | System for recovering heat of biochemical treatment garbage leachate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113501626A (en) * | 2021-08-04 | 2021-10-15 | 马宁 | Be used for landfill leachate treatment facility |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201343459Y (en) * | 2009-01-23 | 2009-11-11 | 华南理工大学 | Heat energy conversion device for heating garbage percolate |
| CN102557339A (en) * | 2011-12-19 | 2012-07-11 | 北京昊业怡生科技有限公司 | Treatment method of landfill leachate |
| JP2012148258A (en) * | 2011-01-21 | 2012-08-09 | Nippon Kanzai Co Ltd | System and method for treating exhaust heat recovering hybrid membrane |
| CN203741071U (en) * | 2014-01-17 | 2014-07-30 | 北京万邦达环保技术股份有限公司 | Evaporation concentration equipment |
| CN106698783A (en) * | 2016-11-12 | 2017-05-24 | 浙江工业大学 | Treatment process for waste water in production of epoxy grease plasticizer |
| CN209108630U (en) * | 2018-10-09 | 2019-07-16 | 武汉科技大学 | Spray-drying installation |
| CN111156735A (en) * | 2020-01-15 | 2020-05-15 | 东北电力大学 | Heating type double-effect absorption-compression combined heat pump waste heat recovery system |
| CN212387934U (en) * | 2020-09-09 | 2021-01-22 | 福建中盟环保科技有限公司 | System for recovering heat of biochemical treatment garbage leachate |
-
2020
- 2020-09-09 CN CN202010940160.XA patent/CN111995194A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201343459Y (en) * | 2009-01-23 | 2009-11-11 | 华南理工大学 | Heat energy conversion device for heating garbage percolate |
| JP2012148258A (en) * | 2011-01-21 | 2012-08-09 | Nippon Kanzai Co Ltd | System and method for treating exhaust heat recovering hybrid membrane |
| CN102557339A (en) * | 2011-12-19 | 2012-07-11 | 北京昊业怡生科技有限公司 | Treatment method of landfill leachate |
| CN203741071U (en) * | 2014-01-17 | 2014-07-30 | 北京万邦达环保技术股份有限公司 | Evaporation concentration equipment |
| CN106698783A (en) * | 2016-11-12 | 2017-05-24 | 浙江工业大学 | Treatment process for waste water in production of epoxy grease plasticizer |
| CN209108630U (en) * | 2018-10-09 | 2019-07-16 | 武汉科技大学 | Spray-drying installation |
| CN111156735A (en) * | 2020-01-15 | 2020-05-15 | 东北电力大学 | Heating type double-effect absorption-compression combined heat pump waste heat recovery system |
| CN212387934U (en) * | 2020-09-09 | 2021-01-22 | 福建中盟环保科技有限公司 | System for recovering heat of biochemical treatment garbage leachate |
Non-Patent Citations (1)
| Title |
|---|
| 李津明 主编: "《现代制药技术》", 30 April 2005, 中国医药科技出版社, pages: 233 - 234 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113501626A (en) * | 2021-08-04 | 2021-10-15 | 马宁 | Be used for landfill leachate treatment facility |
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