CN112694145A - Energy-saving industrial wastewater concentration device and industrial wastewater concentration method - Google Patents
Energy-saving industrial wastewater concentration device and industrial wastewater concentration method Download PDFInfo
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- CN112694145A CN112694145A CN202011479168.7A CN202011479168A CN112694145A CN 112694145 A CN112694145 A CN 112694145A CN 202011479168 A CN202011479168 A CN 202011479168A CN 112694145 A CN112694145 A CN 112694145A
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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
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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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
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
Abstract
The invention provides an energy-saving industrial wastewater concentration device and an industrial wastewater concentration method. Energy-saving industrial waste water enrichment facility includes feed liquor pipe, drain pipe, preheating cabinet, header tank, evaporation tank and heat pump system, and heat pump system includes compressor, main condenser, preheating condenser, throttling arrangement and evaporimeter, and main condenser is used for providing the heat for the evaporation tank, and preheating condenser is used for providing the heat for the preheating cabinet, and the evaporimeter is used for providing cold volume for the header tank. Waste water is injected into the preheating tank in advance, the waste water in the preheating tank is preheated through a preheating condenser of the heat pump system, waste heat of the heat pump system is fully utilized, and the utilization efficiency of energy is improved. In the industrial wastewater concentration method, the preheating condenser is cooled by controlling the injection water flow in the preheating tank until the temperature control standard of the heat pump system is reached, so that the waste heat of the heat pump system is fully utilized, the energy-saving effect is improved, the stable operation of the heat pump system can be ensured, and the wastewater concentration quality and efficiency are improved.
Description
Technical Field
The invention relates to the technical field of industrial wastewater treatment, in particular to an energy-saving industrial wastewater concentration device and an industrial wastewater concentration method.
Background
In the existing industrial wastewater treatment, a heat pump type concentration scheme is generally adopted, and when the heat of a heat pump system is surplus in the wastewater treatment, an air cooling mode is generally adopted for temperature control to ensure the stable working temperature of the system. Fig. 1 is a schematic diagram of a conventional heat pump drying technology, a heat pump system includes a compressor 901, a condenser 902, a throttling device 903, an evaporator 904, a condenser front heat dissipation device 905, and a condenser rear heat dissipation device 906, the condenser 902 is used for providing heat to a wastewater treatment evaporation tank 907, and the evaporator 904 is used for providing a low-temperature cold source to a water collection tank 908. In practical applications, the front heat sink 905 and the rear heat sink 906 of the condenser can be used separately or simultaneously, and when the temperature of the heat pump system is too high, the fan in the heat sinks starts to work to discharge heat out of the heat pump system, thereby achieving the purpose of controlling the temperature of the system. Although the existing heat pump drying technology can effectively control the temperature, most of heat is discharged out of the heat pump system through the front heat dissipation device 905 or/and the rear heat dissipation device 906 of the condenser, which causes energy waste and has poor energy-saving effect.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an energy-saving industrial wastewater concentration device and an industrial wastewater concentration method.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: an energy-saving industrial wastewater concentration device comprises a liquid inlet pipe, a liquid outlet pipe, a preheating tank, a water collecting tank, an evaporation tank and a heat pump system, wherein the liquid inlet pipe is connected with a liquid inlet of the preheating tank, a liquid outlet of the preheating tank is connected to a liquid inlet of the evaporation tank through a pipeline, a steam outlet of the evaporation tank is connected to a steam inlet of the water collecting tank through a steam pipeline, the liquid outlet pipe is connected to a water outlet of the water collecting tank, a first water pump is installed on the liquid inlet pipe, a second water pump is installed on a pipeline between the liquid outlet of the preheating tank and the liquid inlet of the evaporation tank, and a third water pump is installed on the liquid outlet pipe; the heat pump system comprises a compressor, a condenser and a throttling device, wherein the compressor, the condenser and the condenser are sequentially connected in series into a heat circulation loop through pipelines, the condenser is connected in series and comprises a preheating condenser and a main condenser, the main condenser is used for providing heat for an evaporation tank, the preheating condenser is used for providing heat for the preheating tank, and the evaporator is used for providing cold for a water collecting tank.
By adopting the technical scheme of the invention, the waste water can be injected into the preheating tank in advance, the waste water in the preheating tank is preheated by the preheating condenser, the waste heat of the heat pump system is fully utilized, and the utilization efficiency of energy is improved.
Further, the heat pump system heat cycle loop has the following series connection sequence: the system comprises a compressor, a main condenser, a preheating condenser, a throttling device and an evaporator.
By adopting the preferable scheme, the heat pump system supplies heat to the evaporation box firstly, the working temperature of the evaporation box is ensured to be stable, and then the waste heat is used for heating the preheating box, so that the energy-saving effect is improved.
Furthermore, the condenser tandem combination also comprises a supercooling condenser, and the supercooling condenser is connected to a pipeline between the preheating condenser and the throttling device.
By adopting the preferable scheme, when the temperature of the refrigerant flowing out of the preheating condenser is relatively overhigh, the temperature is reduced again to reach the required temperature through the supercooling condenser, and the reliable operation of the system is ensured.
Furthermore, a three-way control valve is installed on a refrigerant pipeline at the rear end of the main condenser of the heat pump system, one outlet of the three-way control valve is communicated with the refrigerant pipeline at the front end of the preheating condenser, and the other outlet of the three-way control valve is communicated with the refrigerant pipeline at the front end of the supercooling condenser.
By adopting the preferable scheme, when the temperature of water in the preheating tank reaches the set temperature, the refrigerant directly enters the supercooling condenser from the main condenser through the control of the three-way control valve.
Further, the heat pump system heat cycle loop has the following series connection sequence: compressor, preheating condenser, main condenser, throttling device, evaporimeter.
Adopt above-mentioned preferred scheme, can select heat pump system to give the heat supply of preheating tank earlier according to the evaporation condition demand of waste water type, can promote the preheating rate and the preheating temperature to waste water, improve waste water concentration speed.
Furthermore, the condenser tandem combination also comprises a supercooling condenser, and the supercooling condenser is connected to a pipeline between the main condenser and the throttling device.
By adopting the preferable scheme, when the temperature of the refrigerant flowing out of the main condenser is relatively overhigh, the temperature is reduced again to reach the required temperature through the supercooling condenser, and the reliable operation of the system is ensured.
Furthermore, a three-way control valve is installed on a refrigerant pipeline at the rear end of the heat pump system compressor, one outflow port of the three-way control valve is communicated with the refrigerant pipeline at the front end of the preheating condenser, and the other outflow port of the three-way control valve is communicated with the refrigerant pipeline at the front end of the main condenser.
By adopting the preferable scheme, when the temperature of water in the preheating tank reaches the set temperature, the refrigerant directly enters the main condenser from the compressor through the control of the three-way control valve.
Further, the supercooling condenser is an air-cooled condenser with a heat radiation fan.
By adopting the preferable scheme, different air quantities can be provided according to the temperature control requirement, so that the temperature stability of the heat pump system is ensured.
Furthermore, a solution concentration sensor is arranged in the evaporation box, and an openable wastewater discharge port is arranged at the bottom of the evaporation box.
Adopt above-mentioned preferred scheme, after solution concentration sensor detects that the waste liquid is evaporated and concentrates to appointed concentration, open the waste water discharge port, the concentrated waste liquid of discharge carries out the waste liquid concentration of next case again.
A method for concentrating industrial wastewater comprises the following steps:
step 1, pumping industrial wastewater into a preheating tank through a first water pump, simultaneously feeding the wastewater into an evaporation tank through a second water pump, stopping the first water pump and the second water pump after the evaporation capacity is reached, and not prestoring the wastewater in the preheating tank;
step 2, heating the evaporation tank through a main condenser of the heat pump system, starting the first water pump again when the temperature of the evaporation tank reaches the working temperature, stopping the first water pump after the maximum liquid level is injected into the preheating tank, and preheating the preheating tank through the preheating condenser;
step 3, when the concentration of the solution in the evaporation box meets the requirement, discharging the concentrated wastewater;
step 4, after the concentrated wastewater is completely discharged, starting a second water pump to inject the wastewater in the preheating tank into the evaporation tank;
and 5, repeating the steps 2-4, and starting the third water pump to pump out the condensed water when the condensed water in the water collection tank reaches a certain amount.
By adopting the technical scheme of the invention, the waste water is injected into the preheating tank in advance, and the waste water in the preheating tank is preheated by the preheating condenser, so that the waste heat of the heat pump system is fully utilized, and the utilization efficiency of energy is improved.
A method for concentrating industrial wastewater comprises the following steps:
step 1, pumping industrial wastewater into a preheating tank through a first water pump, simultaneously feeding the wastewater into an evaporation tank through a second water pump, stopping the first water pump and the second water pump after the evaporation capacity is reached, and not prestoring the wastewater in the preheating tank;
step 2, heating the evaporation tank by a main condenser of the heat pump system, detecting the temperature Ta of a refrigerant flowing out of the main condenser by a second temperature sensor, and adjusting the water injection flow Q into the preheating tank by a flow control valve to enable Ta to be between a minimum temperature set value Tami n and a maximum temperature set value Tamax; when the industrial wastewater in the preheating tank reaches a preset volume, the first water pump stops working; when the first temperature sensor detects that the water temperature Tb in the preheating tank reaches a set value, the three-way control valve is adjusted, so that the refrigerant flowing out of the main condenser directly enters the supercooling condenser, and the heat pump system is cooled through the supercooling condenser;
step 3, when the concentration of the solution in the evaporation box meets the requirement, discharging the concentrated wastewater;
step 4, after the concentrated wastewater is completely discharged, starting a second water pump to inject the wastewater in the preheating tank into the evaporation tank, and starting the first water pump to supplement if the amount of the wastewater injected into the evaporation tank is less than a preset volume;
and 5, repeating the steps 2-4, and starting the third water pump to pump out the condensed water when the condensed water in the water collection tank reaches a certain amount.
Further, in step 2, the water injection flow rate Q is adjustable between 0 and Qmax, and when the temperature Ta > (Tamin + Tamax) 1/2 of the refrigerant flowing out of the main condenser, the water injection flow rate Q is adjusted to the maximum value Qmax; when Ta is less than or equal to (Tamin + Tamax) 1/2, the water injection flow Q is gradually reduced by a 5% Qmax decreasing value.
By adopting the technical scheme of the invention, the preheating condenser is cooled by controlling the injection water flow in the preheating tank until the temperature control standard of the heat pump system is reached, so that the waste heat of the heat pump system is fully utilized, the energy-saving effect is improved, the stable operation of the heat pump system can be ensured, and the concentration quality and efficiency of the waste water are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art configuration;
FIG. 2 is a schematic structural view of an embodiment of the industrial wastewater concentration apparatus according to the present invention;
FIG. 3 is a schematic structural diagram of a post-preheating condenser with a three-way control valve according to the present invention;
FIG. 4 is a schematic diagram of a pre-heater condenser with a three-way control valve according to the present invention.
Names of corresponding parts represented by numerals and letters in the drawings:
101-a liquid inlet pipe; 102-a liquid outlet pipe; 103-a preheating box; 104-a water collecting tank; 105-an evaporation tank; 106-a first water pump; 107-a second water pump; 108-a third water pump; 109-a water vapor pipeline; 201-a compressor; 202-main condenser; 203-preheating a condenser; 204-a subcooling condenser; 205-a throttling device; 206-an evaporator; 207-three-way control valve; 901-a compressor; 902-a condenser; 903-a throttling device; 904-evaporator; 905-front heat dissipation device of condenser; 906-condenser rear heat sink; 907-evaporation box; 908-water collection tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, one embodiment of the present invention is: an energy-saving industrial wastewater concentration device comprises a liquid inlet pipe 101, a liquid outlet pipe 102, a preheating tank 103, a water collecting tank 104, an evaporation tank 105 and a heat pump system, wherein the liquid inlet pipe 101 is connected with a liquid inlet of the preheating tank 103, a liquid outlet of the preheating tank 103 is connected to a liquid inlet of the evaporation tank 105 through a pipeline, a steam outlet of the evaporation tank 105 is connected to a steam inlet of the water collecting tank 104 through a steam pipeline 109, the liquid outlet pipe 102 is connected to a water outlet of the water collecting tank 104, a first water pump 106 is installed on the liquid inlet pipe 101, a second water pump 107 is installed on the pipeline between the liquid outlet of the preheating tank and the liquid inlet of the evaporation tank, and a third water pump 108 is installed on the liquid; the heat pump system comprises a compressor 201, a condenser serial combination, a throttling device 205 and an evaporator 206 which are sequentially connected in series to form a heat circulation loop through pipelines, wherein the condenser serial combination comprises a preheating condenser 203 and a main condenser 202, the main condenser 202 is used for providing heat for an evaporation tank 105, the preheating condenser 203 is used for providing heat for a preheating tank 103, and the evaporator 206 is used for providing cold for a water collecting tank 104.
The beneficial effect of adopting above-mentioned technical scheme is: waste water can be injected into the preheating box in advance, the waste water in the preheating box is preheated through the preheating condenser, waste heat of the heat pump system is fully utilized, and the utilization efficiency of energy is improved.
In another embodiment of the present invention, as shown in fig. 3, the heat pump system heat cycle circuit is connected in series in the following order: compressor 201, main condenser 202, preheat condenser 203, subcool condenser 204, throttling device 205, evaporator 206. A three-way control valve 207 is installed on a refrigerant pipeline at the rear end of the main condenser of the heat pump system, one outlet of the three-way control valve 207 is communicated with a refrigerant pipeline at the front end of the preheating condenser 203, and the other outlet of the three-way control valve 207 is communicated with a refrigerant pipeline at the front end of the supercooling condenser 204. The heat pump system firstly supplies heat to the evaporation tank 105 to ensure the working temperature of the evaporation tank to be stable, and then heats the preheating tank 103 by using waste heat, so that the energy-saving effect is improved; when the temperature of the water in the preheating tank reaches a set temperature, the refrigerant is controlled by a three-way control valve 207 to directly enter the supercooling condenser 204 from the main condenser 202; when the temperature of the refrigerant flowing out of the preheating condenser is relatively overhigh, the temperature is reduced again to reach the required temperature through the supercooling condenser, and the reliable operation of the system is ensured.
In other embodiments of the present invention, as shown in fig. 4, the heat pump system heat cycle is connected in series in the following order: compressor 201, preheat condenser 203, main condenser 202, subcool condenser 204, throttling device 205, evaporator 206. A three-way control valve 207 is installed on a refrigerant pipeline at the rear end of the heat pump system compressor, one outlet of the three-way control valve 207 is communicated with the refrigerant pipeline at the front end of the preheat condenser 203, and the other outlet of the three-way control valve is communicated with the refrigerant pipeline at the front end of the main condenser 202. According to the evaporation condition requirements of the type of the wastewater, the heat pump system is selected to supply heat to the preheating tank firstly, so that the preheating speed and the preheating temperature of the wastewater can be increased, and the wastewater concentration speed is increased; when the temperature of water in the preheating tank reaches a set temperature, the refrigerant directly enters the main condenser from the compressor through the control of a three-way control valve; when the temperature of the refrigerant flowing out of the main condenser is relatively overhigh, the temperature is reduced again to reach the required temperature through the supercooling condenser, and the reliable operation of the system is ensured. The supercooling condenser can be an air cooling condenser with a cooling fan, and different air quantities can be provided according to the temperature control requirement to ensure the temperature stability of the heat pump system.
In other embodiments of the present invention, a solution concentration sensor is disposed in the evaporation tank, and a waste water discharge port capable of being automatically opened and closed is disposed at the bottom of the evaporation tank. After the solution concentration sensor detects that the waste liquid is evaporated and concentrated to the designated concentration, a waste water discharge port is automatically opened, concentrated waste liquid is discharged, and then the waste liquid concentration of the next box is carried out.
The working principle of the invention is briefly described below with reference to an embodiment thereof: as shown in fig. 2, the industrial wastewater is pumped by a liquid inlet pipe 101 through a first water pump 106, enters a preheating tank 103, and enters an evaporation tank 105 through a second water pump 107, at this time, no solution is pre-stored in the preheating tank, and after the evaporation capacity is reached, the first water pump 106 and the second water pump 107 stop working; when the temperature of the evaporation tank 105 reaches the working temperature, the first water pump 106 works again to fill the preheating tank 103 and then stops working, at the moment, through heating the wastewater solution of the evaporation tank 105, water enters the water collecting tank 104 through the water vapor pipeline 109 due to the action of pressure difference after being evaporated, water vapor is condensed into liquid water under the low-temperature action of the evaporator, meanwhile, the gas pressure of the water collecting tank is reduced, the purpose that the gas pressure is lower than that of the evaporation tank is achieved, and when the condensed water in the water collecting tank 104 reaches a certain amount, the third water pump 108 starts working to pump out the condensed water. The working principle of the heat pump system is that a compressor 201 compresses a refrigerant, the compressed gas is changed into high-temperature high-pressure gas, the high-temperature high-pressure gas enters a main condenser 202 to heat waste liquid in an evaporation tank 105, the temperature of the refrigerant is reduced, when the refrigerant flows out of the main condenser, the temperature of the gas is reduced and is still higher than the temperature of waste water solution, the refrigerant continues to enter a preheating condenser 203 to heat the waste water solution in the preheating tank 103, the part of the waste water solution is preheated, when the concentration of the solution in the evaporation tank 105 reaches a requirement, concentrated waste water is discharged, the preheated waste water is pumped into the evaporation tank by a second water pump 107 and can be directly evaporated, the working efficiency is improved, when the temperature of the refrigerant flowing out of the preheating condenser is relatively too high, the refrigerant is cooled again to reach a required temperature when flowing through a cold condenser 204, and finally flows through a throttling device 205 to reach an evaporator 206 to form low-temperature low-pressure water for cooling and condensing, the refrigerant from the evaporator 206 flows back to the compressor 201 to form a cycle.
A method for concentrating industrial wastewater comprises the following steps:
step 1, pumping industrial wastewater into a preheating tank through a first water pump, simultaneously feeding the wastewater into an evaporation tank through a second water pump, stopping the first water pump and the second water pump after the evaporation capacity is reached, and not prestoring the wastewater in the preheating tank;
step 2, heating the evaporation tank through a main condenser of the heat pump system, starting the first water pump again when the temperature of the evaporation tank reaches the working temperature, stopping the first water pump after the maximum liquid level is injected into the preheating tank, and preheating the preheating tank through the preheating condenser;
step 3, when the concentration of the solution in the evaporation box meets the requirement, discharging the concentrated wastewater;
step 4, after the concentrated wastewater is completely discharged, starting a second water pump to inject the wastewater in the preheating tank into the evaporation tank;
and 5, repeating the steps 2-4, and starting the third water pump to pump out the condensed water when the condensed water in the water collection tank reaches a certain amount.
The beneficial effect of adopting above-mentioned technical scheme is: waste water is injected into the preheating tank in advance, the waste water in the preheating tank is preheated through the preheating condenser, waste heat of the heat pump system is fully utilized, and the utilization efficiency of energy is improved.
A method for concentrating industrial wastewater comprises the following steps:
step 1, pumping industrial wastewater into a preheating tank through a first water pump, simultaneously feeding the wastewater into an evaporation tank through a second water pump, stopping the first water pump and the second water pump after the evaporation capacity is reached, and not prestoring the wastewater in the preheating tank;
step 2, heating the evaporation tank by a main condenser of the heat pump system, detecting the temperature Ta of the refrigerant flowing out of the main condenser by a second temperature sensor, adjusting the water injection flow Q to the preheating tank by a flow control valve to ensure that Ta is between a minimum temperature set value Tamin and a maximum temperature set value Tamax, wherein the water injection flow Q is adjustable between 0 and Qmax, and when the temperature Ta of the refrigerant flowing out of the main condenser is greater than (Tamin + Tamax) × 1/2, the water injection flow Q is adjusted to a maximum value Qmax; when Ta is less than or equal to (Tamin + Tamax) 1/2, the water injection flow Q is gradually reduced by a 5% Qmax decreasing value; when the industrial wastewater in the preheating tank reaches a preset volume, the first water pump stops working; when the first temperature sensor detects that the water temperature Tb in the preheating tank reaches a set value, the three-way control valve is adjusted, so that the refrigerant flowing out of the main condenser directly enters the supercooling condenser, and the heat pump system is cooled through the supercooling condenser;
step 3, when the concentration of the solution in the evaporation box meets the requirement, discharging the concentrated wastewater;
step 4, after the concentrated wastewater is completely discharged, starting a second water pump to inject the wastewater in the preheating tank into the evaporation tank, and starting the first water pump to supplement if the amount of the wastewater injected into the evaporation tank is less than a preset volume;
and 5, repeating the steps 2-4, and starting the third water pump to pump out the condensed water when the condensed water in the water collection tank reaches a certain amount.
The beneficial effect of adopting above-mentioned technical scheme is: by controlling the injection water flow in the preheating tank, the preheating condenser is cooled until the temperature control standard of the heat pump system is reached, the waste heat of the heat pump system is fully utilized, the energy-saving effect is improved, the stable operation of the heat pump system can be ensured, and the concentration quality and efficiency of the waste water are improved.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.
Claims (10)
1. An energy-saving industrial wastewater concentration device is characterized by comprising a liquid inlet pipe, a liquid outlet pipe, a preheating tank, a water collecting tank, an evaporation tank and a heat pump system, wherein the liquid inlet pipe is connected with a liquid inlet of the preheating tank, a liquid outlet of the preheating tank is connected to a liquid inlet of the evaporation tank through a pipeline, a steam outlet of the evaporation tank is connected to a steam inlet of the water collecting tank through a steam pipeline, the liquid outlet pipe is connected to a water outlet of the water collecting tank, a first water pump is installed on the liquid inlet pipe, a second water pump is installed on a pipeline between the liquid outlet of the preheating tank and the liquid inlet of the evaporation tank, and a third water pump is installed on the liquid outlet pipe; the heat pump system comprises a compressor, a condenser and a throttling device, wherein the compressor, the condenser and the condenser are sequentially connected in series into a heat circulation loop through pipelines, the condenser is connected in series and comprises a preheating condenser and a main condenser, the main condenser is used for providing heat for an evaporation tank, the preheating condenser is used for providing heat for the preheating tank, and the evaporator is used for providing cold for a water collecting tank.
2. The energy-saving industrial wastewater concentrating device according to claim 1, wherein the heat pump system heat cycle loop is connected in series in the following order: the system comprises a compressor, a main condenser, a preheating condenser, a throttling device and an evaporator.
3. The energy efficient industrial wastewater concentrator of claim 2, wherein the condenser cascade assembly further comprises a subcooling condenser connected in-line between the preheat condenser and the throttling device.
4. The energy-saving industrial wastewater concentrating device according to claim 3, wherein a three-way control valve is installed on the refrigerant pipeline at the rear end of the main condenser of the heat pump system, one outlet of the three-way control valve is communicated with the refrigerant pipeline at the front end of the preheating condenser, and the other outlet of the three-way control valve is communicated with the refrigerant pipeline at the front end of the supercooling condenser; the preheating tank is internally provided with a first temperature sensor for detecting the water temperature, a refrigerant outflow pipeline of the main condenser of the heat pump system is provided with a second temperature sensor, and a liquid inlet pipe at the front end of the preheating tank is provided with a flow detection sensor and a flow control valve.
5. The energy efficient industrial wastewater concentration apparatus according to claim 3, wherein the subcooling condenser is an air-cooled condenser having a heat-radiating fan.
6. The energy-saving industrial wastewater concentrator of claim 1, wherein the condenser cascade assembly further comprises a subcooling condenser, and the heat pump system heat cycle loop is connected in series in the following order: the system comprises a compressor, a preheating condenser, a main condenser, a supercooling condenser, a throttling device and an evaporator.
7. The energy-saving industrial wastewater concentrating device according to claim 6, wherein a three-way control valve is installed on the refrigerant pipeline at the rear end of the heat pump system compressor, one outlet of the three-way control valve is communicated with the refrigerant pipeline at the front end of the preheat condenser, and the other outlet of the three-way control valve is communicated with the refrigerant pipeline at the front end of the main condenser.
8. The industrial wastewater concentration method, characterized in that the energy-saving industrial wastewater concentration device according to claim 1 is adopted, and comprises the following steps:
step 1, pumping industrial wastewater into a preheating tank through a first water pump, simultaneously feeding the wastewater into an evaporation tank through a second water pump, stopping the first water pump and the second water pump after the evaporation capacity is reached, and not prestoring the wastewater in the preheating tank;
step 2, heating the evaporation tank through a main condenser of the heat pump system, starting the first water pump again when the temperature of the evaporation tank reaches the working temperature, stopping the first water pump after the maximum liquid level is injected into the preheating tank, and preheating the preheating tank through the preheating condenser;
step 3, when the concentration of the solution in the evaporation box meets the requirement, discharging the concentrated wastewater;
step 4, after the concentrated wastewater is completely discharged, starting a second water pump to inject the wastewater in the preheating tank into the evaporation tank;
and 5, repeating the steps 2-4, and starting the third water pump to pump out the condensed water when the condensed water in the water collection tank reaches a certain amount.
9. An industrial wastewater concentration method characterized by using the energy-saving industrial wastewater concentration apparatus according to claim 4, comprising the steps of:
step 1, pumping industrial wastewater into a preheating tank through a first water pump, simultaneously feeding the wastewater into an evaporation tank through a second water pump, stopping the first water pump and the second water pump after the evaporation capacity is reached, and not prestoring the wastewater in the preheating tank;
step 2, heating the evaporation tank through a main condenser of the heat pump system, detecting the temperature Ta of a refrigerant flowing out of the main condenser through a second temperature sensor, and adjusting the water injection flow Q into the preheating tank through a flow control valve to enable Ta to be between a minimum temperature set value Tamin and a maximum temperature set value Tamax; when the industrial wastewater in the preheating tank reaches a preset volume, the first water pump stops working; when the first temperature sensor detects that the water temperature Tb in the preheating tank reaches a set value, the three-way control valve is adjusted, so that the refrigerant flowing out of the main condenser directly enters the supercooling condenser, and the heat pump system is cooled through the supercooling condenser;
step 3, when the concentration of the solution in the evaporation box meets the requirement, discharging the concentrated wastewater;
step 4, after the concentrated wastewater is completely discharged, starting a second water pump to inject the wastewater in the preheating tank into the evaporation tank, and starting the first water pump to supplement if the amount of the wastewater injected into the evaporation tank is less than a preset volume;
and 5, repeating the steps 2-4, and starting the third water pump to pump out the condensed water when the condensed water in the water collection tank reaches a certain amount.
10. The method of claim 9, wherein in step 2, the water injection flow rate Q is adjusted between 0 and Qmax, and the water injection flow rate Q is adjusted to a maximum value Qmax when the temperature Ta > (Tamax) × 1/2 of the refrigerant flowing out of the main condenser; when Ta is less than or equal to (Tamin + Tamax) 1/2, the water injection flow Q is gradually reduced by a 5% Qmax decreasing value.
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| CN202011479168.7A CN112694145B (en) | 2020-12-15 | 2020-12-15 | Energy-saving industrial wastewater concentration device and industrial wastewater concentration method |
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| CN202011479168.7A CN112694145B (en) | 2020-12-15 | 2020-12-15 | Energy-saving industrial wastewater concentration device and industrial wastewater concentration method |
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| CN112694145A true CN112694145A (en) | 2021-04-23 |
| CN112694145B CN112694145B (en) | 2023-02-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604921A (en) * | 2022-02-22 | 2022-06-10 | 广东南大机器人有限公司 | Seawater desalination system |
| CN114661074A (en) * | 2022-05-24 | 2022-06-24 | 深圳市家家分类科技有限公司 | Liquid level control method and device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5227027A (en) * | 1990-08-23 | 1993-07-13 | Topper Robert T | High efficiency water distillation apparatus using a heat pump system and process for use thereof |
| WO2010027268A1 (en) * | 2008-09-02 | 2010-03-11 | Ola Heggen | Method for evaporation and possible distillation of fluids using a heat pump |
| CN103446774A (en) * | 2013-07-24 | 2013-12-18 | 李少兵 | Distillation and condensation energy-saving technology based on heat pump technology |
| CN104457004A (en) * | 2014-04-18 | 2015-03-25 | 株式会社富成Engineering | Heat pump system having waste heat recovery structure with 2nd evaporation |
| CN105731572A (en) * | 2016-04-06 | 2016-07-06 | 东莞东元环境科技有限公司 | Novel heat pump evaporation heat recovery combined device and efficient effluent concentration method |
| CN108793571A (en) * | 2018-06-07 | 2018-11-13 | 合肥卡若环保科技合伙企业（有限合伙） | A kind of reinforcing desalination high-salt wastewater processing system |
| CN210012737U (en) * | 2019-02-14 | 2020-02-04 | 北京联合创业环保工程股份有限公司 | Full-energy sludge drying heat pump unit |
| CN110844955A (en) * | 2019-12-11 | 2020-02-28 | 安徽同速环保科技有限公司 | Closed circulation evaporation and condensation system for treating high-salt and high-COD wastewater |
-
2020
- 2020-12-15 CN CN202011479168.7A patent/CN112694145B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5227027A (en) * | 1990-08-23 | 1993-07-13 | Topper Robert T | High efficiency water distillation apparatus using a heat pump system and process for use thereof |
| WO2010027268A1 (en) * | 2008-09-02 | 2010-03-11 | Ola Heggen | Method for evaporation and possible distillation of fluids using a heat pump |
| CN103446774A (en) * | 2013-07-24 | 2013-12-18 | 李少兵 | Distillation and condensation energy-saving technology based on heat pump technology |
| CN104457004A (en) * | 2014-04-18 | 2015-03-25 | 株式会社富成Engineering | Heat pump system having waste heat recovery structure with 2nd evaporation |
| CN105731572A (en) * | 2016-04-06 | 2016-07-06 | 东莞东元环境科技有限公司 | Novel heat pump evaporation heat recovery combined device and efficient effluent concentration method |
| CN108793571A (en) * | 2018-06-07 | 2018-11-13 | 合肥卡若环保科技合伙企业（有限合伙） | A kind of reinforcing desalination high-salt wastewater processing system |
| CN210012737U (en) * | 2019-02-14 | 2020-02-04 | 北京联合创业环保工程股份有限公司 | Full-energy sludge drying heat pump unit |
| CN110844955A (en) * | 2019-12-11 | 2020-02-28 | 安徽同速环保科技有限公司 | Closed circulation evaporation and condensation system for treating high-salt and high-COD wastewater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114604921A (en) * | 2022-02-22 | 2022-06-10 | 广东南大机器人有限公司 | Seawater desalination system |
| CN114661074A (en) * | 2022-05-24 | 2022-06-24 | 深圳市家家分类科技有限公司 | Liquid level control method and device |
| CN114661074B (en) * | 2022-05-24 | 2022-09-20 | 深圳市家家分类科技有限公司 | Liquid level control method and device |
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