CN220351969U - Low temperature heat pump vacuum sludge drying system - Google Patents
Low temperature heat pump vacuum sludge drying system Download PDFInfo
- Publication number
- CN220351969U CN220351969U CN202320924640.6U CN202320924640U CN220351969U CN 220351969 U CN220351969 U CN 220351969U CN 202320924640 U CN202320924640 U CN 202320924640U CN 220351969 U CN220351969 U CN 220351969U
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- heat pump
- sludge
- heat
- steam
- storage tank
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- 238000001035 drying Methods 0.000 title claims abstract description 79
- 239000010802 sludge Substances 0.000 title claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000000428 dust Substances 0.000 claims abstract description 13
- 239000002918 waste heat Substances 0.000 claims abstract description 10
- 238000002955 isolation Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000002351 wastewater Substances 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Drying Of Solid Materials (AREA)
Abstract
The utility model discloses a low-temperature heat pump vacuum sludge drying system which comprises a drying tower, a dust remover and a steam-water separator which are sequentially arranged, wherein the bottom of an inner cavity of the drying tower is provided with a main body part of a sludge drying coil pipe. The sludge drying coil pipe is internally filled with a low-quality heat source, the part outside the drying tower is in non-contact heat exchange connection with a condenser of a heat pump, a waste steam waste heat recoverer is arranged between the dust remover and the steam-water separator, water sprayed and pressurized in the water storage tank exchanges heat with waste steam to cool, the middle section of the circulating water pipe is in non-contact heat exchange connection with an evaporator of the heat pump, and the heat pump is formed by connecting the condenser, the evaporator and a compressor and an expansion valve arranged in a closed loop pipeline between the condenser and the evaporator. By using the mud drying system, the waste steam heat energy is recycled, so that the consumption of circulating water required by cooling is reduced; the sludge can be dried by using a heat source with lower quality and energy consumption, so that the operation cost of the dried sludge is reduced; maintaining the negative pressure of the system can reduce the waste water yield and save the treatment cost.
Description
Technical Field
The utility model relates to a sludge drying system, in particular to an improvement of equipment for performing functional optimization on a low-temperature drying machine by utilizing a heat pump and a vacuum pump.
Background
In a plurality of links of relatively complex sewage treatment, the sludge drying is to gradually drain the water in the sludge by means of complete equipment, so that the dried sludge is further treated. The equipment used in the process step is a drying tower drier, and the generated dry sludge is independently or cooperatively incinerated. As an accompanying product of wet sludge drying, the exhaust steam usually has higher temperature, and needs to be cooled by a dust remover and a condenser. And the condensed waste water is sent into a waste water treatment system, and the exhaust steam is sent into waste gas treatment equipment to meet the requirement of air discharge or is sent into a boiler to be used as primary air and secondary air to participate in incineration.
However, the exhaust steam generated by the existing sludge drying machine is directly cooled by circulating water, and the heat stored by the exhaust steam can not be effectively utilized, so that energy waste is caused; in addition, the existing sludge drying means needs to use a heat source with high quality and high energy consumption, and the treatment cost is high and difficult. In addition, the sealing design of the existing similar treatment equipment is not perfect, and the environmental damage around the factory area caused by the partial leakage of the dead steam is relatively serious.
Disclosure of Invention
The utility model aims to provide a low-temperature heat pump vacuum sludge drying system, which solves the problems of waste steam waste heat recycling and heat energy supply of sludge drying treatment by a drying tower.
The technical scheme for achieving the purpose is that the low-temperature heat pump vacuum sludge drying system comprises a drying tower, a dust remover and a steam-water separator which are sequentially arranged along a dead steam outlet of the drying tower, wherein a main body part of a sludge drying coil is arranged at the bottom of an inner cavity of the drying tower, and the low-temperature heat pump vacuum sludge drying system is characterized in that: the sludge drying coil pipe is internally filled with a low-quality heat source, the part outside the drying tower is in non-contact heat exchange connection with a condenser of the heat pump, a dead steam waste heat recoverer is arranged between the dust remover and the steam-water separator, the sludge drying coil pipe comprises a half-empty water storage tank, a circulating pump, a spray header and a circulating water pipe, one end of the circulating water pipe is connected to the side of the bottom of the water storage tank, the other end of the circulating water pipe is connected to the spray header on the top side of the inner cavity of the water storage tank, the middle section of the circulating water pipe is in non-contact heat exchange connection with the evaporator of the heat pump, and the heat pump is formed by connecting a condenser, the evaporator and a compressor and an expansion valve arranged in a closed loop pipeline between the condenser and the evaporator.
According to the low-temperature heat pump vacuum sludge drying system, further, the top of the drying tower is provided with the openings suitable for wet sludge feeding and semi-dry sludge discharging, the two sides of the drying tower, which are close to the bottom, are provided with the heat source outlet and the heat source inlet, and the heat flow pipes at the two ends of the main body of the sludge drying coil pipe are connected with the heat source outlet and the heat source inlet in a penetrating way in a sealing way.
In the low-temperature heat pump vacuum sludge drying system, further, a suspension-shaped isolation baffle is arranged in the water storage tank, and the bottom edge of the isolation baffle is immersed into the liquid level in the water storage tank; and taking the isolation baffle as a boundary, one side, close to the dust remover, of the water storage tank is used for guiding the exhaust steam to flow to the bottom, and the other side, close to the steam-water separator, is used for guiding the exhaust steam to flow to the top.
In the low-temperature heat pump vacuum sludge drying system, the circulating water pipe is further provided with a drain valve close to the water storage tank.
In the low-temperature heat pump vacuum sludge drying system, a vacuum pump is arranged between the air outlet of the water storage tank and the steam-water separator, and the system negative pressure at the rear section of the drying tower is maintained.
The sludge drying system provided by the utility model has the following progressive advantages: the waste steam heat energy is recycled, which is beneficial to reducing the consumption of circulating water required by cooling; the sludge can be dried by using a heat source with lower quality and energy consumption, so that the operation cost of the dried sludge is reduced; maintaining the negative pressure of the system can reduce the waste water yield and save the treatment cost.
Drawings
Fig. 1 is a schematic diagram of the general assembly structure of a preferred embodiment of the low temperature heat pump vacuum sludge drying system of the present utility model.
Description of the embodiments
The following detailed description of the embodiments of the present utility model is provided with reference to the accompanying drawings, so that the technical scheme of the present utility model is easier to understand and grasp, and the protection scope of the present utility model is defined more clearly.
Aiming at the defects of exhaust steam treatment, waste heat waste and the like in the existing sludge drying product, the utility model innovatively provides a low-temperature heat pump vacuum sludge drying system so as to further optimize the cost investment of the sludge low-temperature drying treatment and the influence on the surrounding environment.
Fig. 1 is a schematic diagram of the general assembly structure of the preferred embodiment of the sludge drying system. The diagram shows that the conventional necessary structure of the low-temperature sludge drying system comprises a drying tower 1, a dust remover 2 and a steam-water separator 3 which are sequentially arranged along a drying tower exhaust gas outlet 12, and a main body part 41 of a sludge drying coil 4 is arranged at the bottom of an inner cavity of the drying tower 1. The general features of the improvement of the technology are described below, wherein on the one hand, the sludge drying coil 4 is internally filled with a low-quality heat source and is in non-contact heat exchange connection with the condenser 61 of the heat pump at a part outside the drying tower 1. The low-quality heat source can be hot water used in a power plant pipe network, and the like, and can be circularly recycled in a relatively closed pipeline loop. On the other hand, a waste steam waste heat recoverer 5 is arranged between the dust remover 2 and the steam-water separator 3, and comprises a semi-empty water storage tank 51, a circulating pump 52, a spray header 53 and a circulating water pipe 54, wherein one end of the circulating water pipe 54 is connected to the side of the bottom of the water storage tank 51, the other end of the circulating water pipe 54 is connected to the spray header 53 on the top side of the inner cavity of the water storage tank, and the middle section of the circulating water pipe 54 is in non-contact heat exchange connection with an evaporator 62 of the heat pump. On the other hand, the heat pump 6 is constituted by a condenser 61, an evaporator 62, and a compressor 63 and an expansion valve 64 provided in a closed-loop circuit therebetween, as power for recovering and utilizing waste heat and supplying a heat source to the drying tower.
According to the scheme, the traditional condenser is replaced after the dust remover, and the circulating waterway based on the water storage tank and the spray header is arranged for recovering waste heat of exhaust steam through heat exchange. In the process, the state of circulating water is not changed, and exhaust steam enters the cavity from the top side of the water storage tank and fully contacts and exchanges heat with the sprayed water mist; when the exhaust steam is pressed below the liquid level in the water storage tank and then is gushed up from the other side, the exhaust steam is in secondary contact heat exchange with the water mist. In the process, the temperature of the exhaust steam is greatly reduced, and heat is transferred to circulating water in the water storage tank. The circulating water after temperature rise flows to the evaporator, is sent to the spray header after heat exchange and temperature reduction, and is used for forming water mist absorbing heat at the top of the water storage tank. Moreover, a low-quality heat source is introduced into the coil, the temperature is higher before the coil enters the drying tower, and the temperature is reduced by heat release after the wet sludge is dried in the drying tower, and the wet sludge is discharged from the drying tower at a lower temperature. And then the heat source is heated by a condenser of the heat pump, and the sludge returns to the drying tower again to continuously dry the sludge, so that the sludge is circulated and reciprocated. The heat pump here works in combination with the aforementioned constituent structures as follows: after heat exchange with hot water of the exhaust steam waste heat recoverer is performed by an evaporator, a medium (such as freon) in a closed loop pipeline is changed from low-temperature low-pressure liquid into low-temperature low-pressure gas, and then is changed into high-temperature high-pressure gas after being compressed by a compressor. And then, the high-temperature and high-pressure gas is subjected to heat exchange by a condenser to a low-quality heat source for sludge drying in the coil pipe and then is changed into low-temperature and high-pressure liquid, and then is reduced in pressure by an expansion valve and then is changed into low-temperature and low-pressure liquid. Therefore, through the circulating reciprocating heat exchange process of three different positions and mutual correlation, the waste heat of the exhaust steam is scientifically recycled, and meanwhile, the heat source requirement for sludge drying is greatly reduced, and the treatment cost is reduced.
From a further refined feature, the top of the drying tower 1 is provided with an opening 11 for feeding wet sludge and discharging semi-dry sludge, i.e. wet sludge enters the drying tower through this opening, from which opening the dried semi-dry sludge is also removed. As to how to exclude, not as a technical improvement to the protection claimed in the present application, suction or pouring may be used for the conventional operation in the industry. And the two sides of the drying tower 1, which are close to the bottom, are provided with a heat source outlet 14 and a heat source inlet 13, and the heat flow pipes at the two ends of the main body part of the sludge drying coil pipe are connected with the heat source outlet and the heat source inlet in a penetrating way in a sealing way, namely, wet sludge and semi-dry sludge cannot overflow from the inlet and the outlet.
The water storage tank 51 is provided with a hanging isolation baffle 511, and the bottom edge of the isolation baffle 511 is slightly immersed in the liquid surface of the water storage tank. With the isolation baffle plate as a boundary, one side of the water storage tank, which is close to the dust remover, guides the exhaust steam to flow to the bottom, and the other side of the water storage tank, which is close to the steam-water separator, guides the exhaust steam to flow to the top. Wherein the circulating water pipe 54 is provided with a drain valve 55 near the water storage tank 51 so as to drain the redundant circulating water in time when the liquid level in the water storage tank is too high and the exhaust steam emission is influenced.
In addition, in the illustrated preferred embodiment, a vacuum pump 7 is arranged between the exhaust port of the water storage tank and the steam-water separator, and the negative pressure of the system at the rear section of the drying tower is maintained on the premise of not influencing the normal circulation path of the exhaust steam. Therefore, the exhaust steam is prevented from leaking, the environmental protection around the factory is facilitated, pollution is not easy to occur, and the treatment cost of the exhaust steam is reduced.
In summary, the description of the scheme and the detailed embodiments of the sludge drying system of the utility model show that the scheme has substantial characteristics and improvements: the heat pump and the vacuum pump are utilized to improve the equipment of the traditional low-temperature drying system, so that the waste steam heat energy can be recycled, and the consumption of circulating water required by cooling is reduced; the sludge can be dried by using a heat source with lower quality and energy consumption, so that the operation cost of the dried sludge is reduced; maintaining the negative pressure of the system can reduce the waste water yield, save the treatment cost, prevent the exhaust steam from leaking out and be beneficial to environmental protection around the factory.
In addition to the above embodiments, other embodiments of the present utility model are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present utility model as claimed.
Claims (5)
1. The utility model provides a low temperature heat pump vacuum sludge drying system, includes drying tower and along drying tower exhaust steam export dust remover, the catch water that establishes in proper order, drying tower's inner chamber bottom is equipped with the main part of sludge drying coil, its characterized in that: the sludge drying coil pipe is internally filled with a low-quality heat source, the part outside the drying tower is in non-contact heat exchange connection with a condenser of the heat pump, a dead steam waste heat recoverer is arranged between the dust remover and the steam-water separator, the sludge drying coil pipe comprises a half-empty water storage tank, a circulating pump, a spray header and a circulating water pipe, one end of the circulating water pipe is connected to the side of the bottom of the water storage tank, the other end of the circulating water pipe is connected to the spray header on the top side of the inner cavity of the water storage tank, the middle section of the circulating water pipe is in non-contact heat exchange connection with the evaporator of the heat pump, and the heat pump is formed by connecting a condenser, the evaporator and a compressor and an expansion valve arranged in a closed loop pipeline between the condenser and the evaporator.
2. The low temperature heat pump vacuum sludge drying system according to claim 1, wherein: the top of the drying tower is provided with an opening suitable for wet sludge feeding and semi-dry sludge discharging, two sides of the drying tower, which are close to the bottom, are provided with a heat source outlet and a heat source inlet, and heat flow pipes at two ends of the main body of the sludge drying coil pipe are connected with the heat source outlet and the heat source inlet in a penetrating way in a sealing way.
3. The low temperature heat pump vacuum sludge drying system according to claim 1, wherein: an overhang-shaped isolation baffle is arranged in the water storage tank, and the bottom edge of the isolation baffle is immersed into the liquid level in the water storage tank; and taking the isolation baffle as a boundary, one side, close to the dust remover, of the water storage tank is used for guiding the exhaust steam to flow to the bottom, and the other side, close to the steam-water separator, is used for guiding the exhaust steam to flow to the top.
4. The low temperature heat pump vacuum sludge drying system according to claim 1, wherein: the circulating water pipe is provided with a drain valve close to the water storage tank.
5. The low temperature heat pump vacuum sludge drying system according to claim 1, wherein: a vacuum pump is arranged between the air outlet of the water storage tank and the steam-water separator, and the negative pressure of the system at the rear section of the drying tower is maintained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320924640.6U CN220351969U (en) | 2023-04-23 | 2023-04-23 | Low temperature heat pump vacuum sludge drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320924640.6U CN220351969U (en) | 2023-04-23 | 2023-04-23 | Low temperature heat pump vacuum sludge drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220351969U true CN220351969U (en) | 2024-01-16 |
Family
ID=89505151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320924640.6U Active CN220351969U (en) | 2023-04-23 | 2023-04-23 | Low temperature heat pump vacuum sludge drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220351969U (en) |
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2023
- 2023-04-23 CN CN202320924640.6U patent/CN220351969U/en active Active
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