阅读说明：本技术 一种多级浓缩的处理设备 (Multistage concentrated treatment facility ) 是由 石曾矿 曹小高 曹赞 彭林 于 2021-01-19 设计创作，主要内容包括：本发明公开了一种多级浓缩的处理设备,处理设备包括热泵单元、一级处理单元、二级处理单元、三级处理单元、抽真空单元和冷凝水排出单元,热泵单元包括热泵冷凝器、压缩机和三合一气液分离器,一级处理单元包括一级闪蒸罐、一级循环泵、一级冷凝器和一级气液分离器,二级处理单元包括二级闪蒸罐、二级循环泵、二级冷凝器和二级气液分离器,三级处理单元包括三级闪蒸罐、三级循环泵、三级冷凝器和三级气液分离器,抽真空单元包括真空泵和气水分离器,冷凝水排出单元包括负压排水泵。一级处理单元中残余的废水输送至二级处理单元处理,二级处理单元中残余的废水输送至三级处理单元中处理,多效蒸发。本发明可广泛应用于原液处理技术领域。(The invention discloses a multi-stage concentration treatment device, which comprises a heat pump unit, a primary treatment unit, a secondary treatment unit, a tertiary treatment unit, a vacuumizing unit and a condensed water discharge unit, wherein the heat pump unit comprises a heat pump condenser, a compressor and a three-in-one gas-liquid separator, the primary treatment unit comprises a primary flash tank, a primary circulating pump, a primary condenser and a primary gas-liquid separator, the secondary treatment unit comprises a secondary flash tank, a secondary circulating pump, a secondary condenser and a secondary gas-liquid separator, the tertiary treatment unit comprises a tertiary flash tank, a tertiary circulating pump, a tertiary condenser and a tertiary gas-liquid separator, the vacuumizing unit comprises a vacuum pump and a gas-water separator, and the condensed water discharge unit comprises a negative pressure drainage pump. And conveying the residual wastewater in the primary treatment unit to a secondary treatment unit for treatment, conveying the residual wastewater in the secondary treatment unit to a tertiary treatment unit for treatment, and performing multi-effect evaporation. The invention can be widely applied to the technical field of stock solution treatment.)

1. A processing apparatus for multi-stage concentration, characterized in that: comprises that

The heat pump unit comprises a heat pump condenser (100), a compressor (501) and a three-in-one gas-liquid separator (502), wherein the compressor (501) compresses low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas by applying work, and the high-temperature and high-pressure refrigerant gas is released and condensed into liquid in the heat pump condenser (100);

the system comprises a primary treatment unit, wherein the primary treatment unit comprises a primary flash tank (101), a primary circulating pump (102), a primary condenser (103) and a primary gas-liquid separator (104), the primary circulating pump (102) is used for pressurizing wastewater in the primary flash tank (101) and sending the wastewater into the heat pump condenser (100), the heat pump condenser (100) is used for heating the wastewater, the heated wastewater enters the primary flash tank (101) for flash evaporation, the primary condenser (103) is used for condensing steam in the primary flash tank (101), the condensed material is sent into the primary gas-liquid separator (104), and the primary gas-liquid separator (104) is used for separating condensed water and non-condensable gas;

the secondary treatment unit comprises a secondary flash tank (201), a secondary circulating pump (202), a secondary condenser (203) and a secondary gas-liquid separator (204), the secondary flash tank (201) is connected with the primary flash tank (101) through a pipeline, the secondary circulating pump (202) is used for pressurizing and sending wastewater in the secondary flash tank (201) into the primary condenser (103), the primary condenser (103) is used for heating the wastewater, the heated wastewater enters the secondary flash tank (201) for flash evaporation, the secondary condenser (203) is used for condensing steam in the secondary flash tank (201) and sending the condensed material into the secondary gas-liquid separator (204), and the secondary gas-liquid separator (204) is used for separating condensed water and non-condensed gas;

the three-stage treatment unit comprises a three-stage flash tank (301), a three-stage circulating pump (302), a three-stage condenser (303) and a three-stage gas-liquid separator (304), the three-stage flash tank (301) is connected with the two-stage flash tank (201) through a pipeline, the three-stage circulating pump (302) is used for pressurizing and sending the wastewater in the three-stage flash tank (301) into the two-stage condenser (203), the two-stage condenser (203) is used for heating the wastewater, the heated wastewater is sent back to the three-stage flash tank (301) for flash evaporation, the three-stage condenser (303) is used for condensing steam in the three-stage flash tank (301), the condensed material is sent to the three-stage gas-liquid separator (304), and the three-stage gas-liquid separator (304) is used for separating condensed water and non;

the vacuumizing unit comprises a vacuum pump (403) and a gas-water separator (402), wherein the vacuum pump (403) is used for conveying the noncondensable gas separated by the primary gas-liquid separator (104), the secondary gas-liquid separator (204) and the tertiary gas-liquid separator (304) into the gas-water separator (402), and the gas-water separator (402) is used for treating the noncondensable gas separated by the primary gas-liquid separator (104), the secondary gas-liquid separator (204) and the tertiary gas-liquid separator (304);

a condensed water discharge unit including a negative pressure drain pump (401), the negative pressure drain pump (401) for treating condensed water separated in the primary gas-liquid separator (104), the secondary gas-liquid separator (204), and the tertiary gas-liquid separator (304);

wherein the refrigerant condensate is evaporated in the three-stage condenser (303) to a low-temperature, low-pressure vapor.

2. The processing plant for multistage concentration according to claim 1, characterized in that: the vacuumizing unit comprises a cooler (404), the cooler (404) is communicated with the gas-water separator (402) through a pipeline, the negative pressure drainage pump (401) is used for replenishing water to the gas-water separator (402) through a pipeline, and a refrigerant from the three-stage condenser (303) is used for cooling water in the gas-water separator (402).

3. The apparatus for multi-stage concentration processing according to claim 2, wherein: the refrigerant in the processing equipment flows in sequence to a compressor (501), a heat pump condenser (100), a three-in-one gas-liquid separator (502), a three-stage condenser (303), a cooler (404), a three-in-one gas-liquid separator (502) and the compressor (501) and circularly reciprocates.

4. The multi-stage concentration processing apparatus according to any one of claims 1 to 3, wherein: the heat pump unit comprises an air condenser (503), and the air condenser (503) is used for dissipating the redundant heat of the heat pump unit to maintain the energy balance of the heat pump unit.

5. The multi-stage concentration processing apparatus according to any one of claims 1 to 3, wherein: and the negative pressure drainage pump (401) is used for conveying washing water to the primary flash tank (101), the secondary flash tank (201) and the tertiary flash tank (301) through pipelines by utilizing condensed water generated by the processing equipment.

6. The multi-stage concentration processing apparatus according to any one of claims 1 to 3, wherein: the treatment apparatus includes a discharge pump (600).

7. The multi-stage concentration processing apparatus according to any one of claims 1 to 3, wherein: the negative pressure drainage pump (401) is provided with a water outlet pipe (405), and the water outlet pipe (405) is used for discharging condensed water to a boundary area.

8. The processing plant for multistage concentration according to claim 1, characterized in that: the two-stage treatment units are at least two, two adjacent two-stage flash tanks (201) are connected through a pipeline, the waste water in the two-stage flash tank (201) is input into the two-stage condenser (203) in the former two-stage treatment unit by the two-stage circulating pump (202) in the latter two-stage treatment unit, the two-stage condenser (203) in the former two-stage treatment unit is used for heating the waste water, and the heated waste water is sent back to the two-stage flash tank (201) in the latter two-stage treatment unit.

9. A processing apparatus for multi-stage concentration, characterized in that: comprises that

The heat pump unit comprises a heat pump condenser (100), a compressor (501) and a three-in-one gas-liquid separator (502), wherein the compressor (501) compresses low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas by applying work, and the high-temperature and high-pressure refrigerant gas is released and condensed into liquid in the heat pump condenser (100);

a primary treatment unit, which comprises a primary flash tank (701), a primary circulating pump (702), a primary condenser (703) and a primary gas-liquid separator (704), wherein the primary circulating pump (702) is used for pressurizing the wastewater in the primary flash tank (701) and sending the wastewater into the heat pump condenser (100), the heat pump condenser (100) is used for heating the wastewater, the heated wastewater enters the primary flash tank (701) for flashing, the primary condenser (703) is used for condensing steam in the primary flash tank (701), the condensed material is sent into the primary gas-liquid separator (704), and the primary gas-liquid separator (704) is used for separating condensed water and non-condensable gas;

a secondary treatment unit, which comprises a secondary flash tank (801), a secondary circulating pump (802), a secondary condenser (803) and a secondary gas-liquid separator (804), wherein the secondary flash tank (801) is connected with the primary flash tank (701) through a pipeline, the secondary circulating pump (802) is used for pressurizing and sending the wastewater in the secondary flash tank (801) into the primary condenser (703), the primary condenser (703) is used for heating the wastewater, the heated wastewater is sent back to the secondary flash tank (801) for flashing, the secondary condenser (803) is used for condensing the steam in the secondary flash tank (801), the condensed material is sent to the secondary gas-liquid separator (804), and the secondary gas-liquid separator (804) is used for separating condensed water and non-condensable gas;

the vacuumizing unit comprises a vacuum pump (403) and a gas-water separator (402), the vacuum pump (403) is used for conveying the noncondensable gas separated by the primary gas-liquid separator (704) and the secondary gas-liquid separator (804) into the gas-water separator (402), and the gas-water separator (402) is used for processing the noncondensable gas separated by the primary gas-liquid separator (704) and the secondary gas-liquid separator (804);

wherein the refrigerant condensate is heat-absorbed and evaporated in the secondary condenser (803) into a low-temperature and low-pressure vapor.

Technical Field

The invention relates to the technical field of stock solution treatment, in particular to a multi-stage concentration treatment device.

Background

The concentrator is used as a concentration treatment device and widely applied to the industries of chemical engineering, pharmacy, environmental protection and the like, and the common concentrator mainly comprises an evaporation system, a feeding system, a liquid discharge system and a plurality of filter plates, so that the concentration energy consumption is high. In addition, the existing common thickener is also poor in energy conservation and environmental protection, more energy is input for obtaining the concentrated solution, the product obtained after the stock solution is treated cannot be fully utilized, and the energy conservation and environmental protection cannot be effectively realized.

Disclosure of Invention

In order to solve at least one of the above technical problems and improve energy efficiency, the present invention provides a multi-stage concentration processing apparatus, which adopts the following technical scheme:

the invention provides a multistage concentration processing device which comprises a heat pump unit, a primary processing unit, a secondary processing unit, a tertiary processing unit, a vacuumizing unit and a condensed water discharge unit, wherein the heat pump unit comprises a heat pump condenser, a compressor and a three-in-one gas-liquid separator, the compressor compresses low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas by acting, and the high-temperature and high-pressure refrigerant gas is released in the heat pump condenser and condensed into liquid; the primary treatment unit comprises a primary flash tank, a primary circulating pump, a primary condenser and a primary gas-liquid separator, wherein the primary circulating pump is used for pressurizing and feeding the wastewater in the primary flash tank into the heat pump condenser, the heat pump condenser is used for heating the wastewater, the heated wastewater enters the primary flash tank for flash evaporation, the primary condenser is used for condensing steam in the primary flash tank, the condensed material is fed into the primary gas-liquid separator, and the primary gas-liquid separator is used for separating condensed water and non-condensable gas; the secondary treatment unit comprises a secondary flash tank, a secondary circulating pump, a secondary condenser and a secondary gas-liquid separator, the secondary flash tank is connected with the primary flash tank through a pipeline, the secondary circulating pump is used for pressurizing wastewater in the secondary flash tank and sending the wastewater into the primary condenser, the primary condenser is used for heating the wastewater, the heated wastewater enters the secondary flash tank for flash evaporation, the secondary condenser is used for condensing steam in the secondary flash tank and sending the condensed material into the secondary gas-liquid separator, and the secondary gas-liquid separator is used for separating condensed water and non-condensed gas; the three-stage treatment unit comprises a three-stage flash tank, a three-stage circulating pump, a three-stage condenser and a three-stage gas-liquid separator, the three-stage flash tank is connected with the two-stage flash tank through a pipeline, the three-stage circulating pump is used for pressurizing wastewater in the three-stage flash tank and sending the wastewater into the two-stage condenser, the two-stage condenser is used for heating the wastewater, the heated wastewater is sent back to the three-stage flash tank for flash evaporation, the three-stage condenser is used for condensing steam in the three-stage flash tank, the condensed material is sent into the three-stage gas-liquid separator, and the three-stage gas-liquid separator is; the vacuumizing unit comprises a vacuum pump and a gas-water separator, the vacuum pump is used for conveying the noncondensable gas separated by the primary gas-liquid separator, the secondary gas-liquid separator and the tertiary gas-liquid separator into the gas-water separator, and the gas-water separator is used for treating the noncondensable gas separated by the primary gas-liquid separator, the secondary gas-liquid separator and the tertiary gas-liquid separator; the condensed water discharge unit includes a negative pressure drain pump for treating the condensed water separated in the primary gas-liquid separator, the secondary gas-liquid separator, and the tertiary gas-liquid separator; wherein the refrigerant condensate is evaporated in the three-stage condenser to a low-temperature and low-pressure vapor.

In some embodiments of the invention, the vacuum pumping unit includes a cooler, the cooler is communicated with the gas-water separator through a pipeline, the negative pressure drainage pump is used for replenishing water to the gas-water separator through a pipeline, and the refrigerant from the three-stage condenser is used for cooling water in the gas-water separator.

In some embodiments of the present invention, the refrigerant in the processing equipment flows in sequence through the compressor, the heat pump condenser, the three-in-one gas-liquid separator, the three-stage condenser, the cooler, the three-in-one gas-liquid separator and the compressor, and is circulated and reciprocated.

In some embodiments of the invention, the heat pump unit includes an air condenser that maintains the heat pump unit in energy balance by dissipating excess heat from the heat pump unit.

In some embodiments of the invention, the negative pressure drain pump is configured to convey the wash water to the primary flash tank, the secondary flash tank, and the tertiary flash tank via pipes using condensate generated by the process equipment itself.

In certain embodiments of the invention, the treatment apparatus comprises a discharge pump.

In some embodiments of the present invention, the negative pressure drainage pump is provided with a water outlet pipe, and the water outlet pipe is used for discharging the condensed water to the outside of the boundary area.

In some embodiments of the invention, the two secondary treatment units are arranged in at least two, two adjacent two secondary flash tanks are connected through a pipeline, the secondary circulating pump in the latter secondary treatment unit inputs the wastewater in the secondary flash tank into the secondary condenser in the former secondary treatment unit, the secondary condenser in the former secondary treatment unit is used for heating the wastewater, and the heated wastewater is sent back to the secondary flash tank in the latter secondary treatment unit.

The multistage concentration processing equipment provided by the invention comprises a heat pump unit, a primary processing unit, a secondary processing unit and a vacuumizing unit, wherein the heat pump unit comprises a heat pump condenser, a compressor and a three-in-one gas-liquid separator, the compressor compresses low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas by acting, and the high-temperature and high-pressure refrigerant gas is released and condensed into liquid in the heat pump condenser; the primary treatment unit comprises a primary flash tank, a primary circulating pump, a primary condenser and a primary gas-liquid separator, wherein the primary circulating pump is used for pressurizing and feeding the wastewater in the primary flash tank into the heat pump condenser, the heat pump condenser is used for heating the wastewater, the heated wastewater enters the primary flash tank for flash evaporation, the primary condenser is used for condensing steam in the primary flash tank, the condensed material is fed into the primary gas-liquid separator, and the primary gas-liquid separator is used for separating condensed water and non-condensable gas; the secondary treatment unit comprises a secondary flash tank, a secondary circulating pump, a secondary condenser and a secondary gas-liquid separator, the secondary flash tank is connected with the primary flash tank through a pipeline, the secondary circulating pump is used for pressurizing wastewater in the secondary flash tank and sending the wastewater into the primary condenser, the primary condenser is used for heating the wastewater, the heated wastewater is sent back to the secondary flash tank for flash evaporation, the secondary condenser is used for condensing steam in the secondary flash tank, the condensed material is sent to the secondary gas-liquid separator, and the secondary gas-liquid separator is used for separating condensed water and non-condensable gas; the vacuumizing unit comprises a vacuum pump and a gas-water separator, the vacuum pump is used for conveying the noncondensable gas separated by the primary gas-liquid separator and the secondary gas-liquid separator into the gas-water separator, and the gas-water separator is used for treating the noncondensable gas separated by the primary gas-liquid separator and the secondary gas-liquid separator; wherein the refrigerant condensate absorbs heat in the secondary condenser and is evaporated into low-temperature and low-pressure vapor.

The embodiment of the invention has at least the following beneficial effects: the residual wastewater in the primary treatment unit is conveyed to the secondary treatment unit for treatment, the residual wastewater in the secondary treatment unit is conveyed to the tertiary treatment unit for treatment, and the subsequent stage utilizes the steam generated by the previous stage, so that the energy efficiency is improved, and the energy is saved. The invention can be widely applied to the technical field of stock solution treatment.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a wastewater treatment process showing a primary treatment unit, a secondary treatment unit and a tertiary treatment unit;

FIG. 2 is a schematic view of a wastewater treatment process showing a primary treatment unit and a secondary treatment unit.

Detailed Description

Embodiments of the invention, examples of which are illustrated in the accompanying drawings, are described in detail below with reference to fig. 1-2, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., are used in an orientation or positional relationship indicated based on the drawings, it is merely for convenience of description and simplicity of description, and it is not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, is not to be considered as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention relates to a multi-stage concentration treatment device, which comprises a heat pump unit, a primary treatment unit, a secondary treatment unit, a tertiary treatment unit, a vacuumizing unit and a condensed water discharge system, and also comprises a concentrated solution discharge system and a cleaning system, wherein low-concentration wastewater is input into the primary treatment unit for primary evaporation, residual wastewater in the primary treatment unit is input into the secondary treatment unit for secondary evaporation, residual wastewater in the secondary treatment unit is input into the tertiary treatment unit for tertiary evaporation, and the concentrated solution and the condensed water are obtained after the wastewater is treated. The vacuumizing unit is used as a vacuumizing system for discharging non-condensable gas generated during evaporation, and the heat pump unit is used as a heat pump system for providing heat required by evaporation and cold required by condensation. Further, the treatment equipment comprises a discharge pump 600, the discharge pump 600 is used for discharging concentrated liquid, condensed water is produced by a condensed water discharging system, and the tank body is cleaned by a cleaning system.

Specifically, the heat pump unit comprises a heat pump condenser 100, a compressor 501 and a three-in-one gas-liquid separator 502, the whole system of the processing equipment is supplied with heat by the heat pump system, electric energy is consumed, extra steam or heat sources are not needed for supplying heat, heat is circularly exchanged, and the energy utilization rate is improved. The compressor 501 compresses low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas by performing work, and the high-temperature and high-pressure refrigerant gas is discharged and condensed into liquid in the heat pump condenser 100.

The primary treatment unit comprises a primary flash tank 101, a primary circulating pump 102, a primary condenser 103 and a primary gas-liquid separator 104. Specifically, the primary circulation pump 102 is configured to pressurize the wastewater in the primary flash tank 101 and send the wastewater to the heat pump condenser 100, the heat pump condenser 100 is configured to heat the wastewater, and the heated wastewater is flashed in the primary flash tank 101. The first-stage condenser 103 is used for condensing steam in the first-stage flash tank 101, the condensed material is sent to the first-stage gas-liquid separator 104, and the first-stage gas-liquid separator 104 is used for separating condensed water and non-condensable gas.

The secondary treatment unit comprises a secondary flash tank 201, a secondary circulating pump 202, a secondary condenser 203 and a secondary gas-liquid separator 204, and the secondary flash tank 201 is connected with the primary flash tank 101 through a pipeline. Specifically, the secondary circulation pump 202 is used for pressurizing and feeding the wastewater in the secondary flash tank 201 into the primary condenser 103, the primary condenser 103 is used for heating the wastewater, the heated wastewater is fed back to the secondary flash tank 201, and the steam fed from the primary flash tank 101 is used for exchanging heat with the wastewater fed by the secondary circulation pump 202 in the primary condenser 103. The secondary condenser 203 is used for condensing steam in the secondary flash tank 201, the condensed material is sent to the secondary gas-liquid separator 204, and the secondary gas-liquid separator 204 is used for separating condensed water and non-condensable gas.

The three-stage treatment unit comprises a three-stage flash tank 301, a three-stage circulating pump 302, a three-stage condenser 303 and a three-stage gas-liquid separator 304, and the three-stage flash tank 301 is connected with the two-stage flash tank 201 through a pipeline. Specifically, the three-stage circulation pump 302 is used for pressurizing the wastewater in the three-stage flash tank 301 and feeding the wastewater into the two-stage condenser 203, the two-stage condenser 203 is used for heating the wastewater and feeding the heated wastewater back to the three-stage flash tank 301, and the steam fed from the two-stage flash tank 201 is used for exchanging heat with the wastewater fed by the three-stage circulation pump 302 in the two-stage condenser 203. The refrigerant condensate absorbs heat in the three-stage condenser 303 and is evaporated into low-temperature and low-pressure steam for the compressor 501 to perform compression work, the three-stage condenser 303 is used for condensing the steam in the three-stage flash tank 301 and sending the condensed material into the three-stage gas-liquid separator 304, and the three-stage gas-liquid separator 304 is used for separating condensed water and non-condensed gas.

With reference to the drawings, it can be understood that the condensed water and the non-condensable gas separated by the first-stage gas-liquid separator 104, the second-stage gas-liquid separator 204 and the third-stage gas-liquid separator 304 are conveyed to a vacuum pumping unit and a condensed water discharge system through pipelines for subsequent treatment, specifically, the vacuum pumping unit comprises a vacuum pump 403 and a gas-water separator 402, the non-condensable gas is discharged through the gas-water separator 402 after being pumped by the vacuum pump 403, and the non-condensable gas is discharged after the gas-water separator 402 separates the water from the non-condensable gas. The condensed water drain system includes a negative pressure drain pump 401, and the negative pressure drain pump 401 is used to drain the condensed water in the treating apparatus.

Further, the vacuum pumping unit comprises a cooler 404, the cooler 404 is communicated with the gas-water separator 402 through a pipeline, the negative pressure drainage pump 401 is used for replenishing water to the gas-water separator 402 through a pipeline, the cooler 404 is used for cooling the water in the gas-water separator 402, and the refrigerant from the third-stage condenser 303 is used for cooling the water in the gas-water separator 402.

With reference to the drawings, it can be understood that the refrigerant flows in the processing equipment are in sequence of a compressor 501, a heat pump condenser 100, a three-in-one gas-liquid separator 502, a three-stage condenser 303, a cooler 404, a three-in-one gas-liquid separator 502 and a compressor 501, and are circulated and reciprocated.

As will be appreciated with reference to the figures, the heat pump unit includes an air condenser 503, the air condenser 503 dissipating excess heat generated by the refrigerant processed by the compressor 501. Specifically, the surplus gaseous refrigerant generated by the compressor 501 enters the air condenser 503 through a pipeline, and after the air condenser 503 discharges heat, the refrigerant becomes liquid and is conveyed to the three-in-one gas-liquid separator 502 through a pipeline.

By utilizing condensed water generated by the processing equipment, the negative pressure drainage pump 401 conveys cleaning water to the first-level flash tank 101, the second-level flash tank 201 and the third-level flash tank 301 through pipelines so as to clean all levels of processing units, no extra cleaning water is consumed, and water resources are saved. With reference to the drawings, the negative pressure drainage pump 401 is provided with a water outlet pipe 405, and the water outlet pipe 405 is used for discharging condensed water to the outside of a boundary area. It can be appreciated that the outlet of the negative pressure drain pump 401 has three points: firstly, draining water to the outside of a boundary area; supplementing water to the vacuum pump 403 and the gas-water separator 402 for the vacuum pump 403 to work; and thirdly, providing washing water.

A pressure gauge is provided on the primary flash tank 101 for monitoring the evaporation pressure in the primary flash tank 101. A pressure gauge is provided on the secondary flash tank 201 for monitoring the evaporation pressure in the secondary flash tank 201. A pressure gauge is provided on the third-stage flash tank 301 for monitoring the evaporation pressure in the third-stage flash tank 301.

Further, the primary flash tank 101 is provided with a primary exhaust electromagnetic valve, and the primary exhaust electromagnetic valve is controlled to be opened and closed through a PLC (programmable logic controller) during vacuum pumping; the secondary flash tank 201 is provided with a secondary exhaust electromagnetic valve, and the opening and closing of the secondary exhaust electromagnetic valve are controlled by a PLC (programmable logic controller) during vacuum pumping; the three-level flash tank 301 is provided with a three-level exhaust electromagnetic valve, and the three-level exhaust electromagnetic valve is controlled to be opened and closed through a PLC (programmable logic controller) during vacuum pumping.

The primary flash tank 101 is provided with a first liquid level meter for monitoring the liquid level in the primary flash tank 101. The secondary flash tank 201 is provided with a first liquid level meter for monitoring the liquid level in the secondary flash tank 201. The tertiary flash tank 301 is provided with a first liquid level meter for monitoring the liquid level in the tertiary flash tank 301.

Further, the first-level flash tank 101 is provided with a first-level feeding electromagnetic valve, the first-level feeding electromagnetic valve is opened and closed through the liquid level transmitter, and feeding is achieved through the self-absorption effect of negative pressure. The second-stage flash tank 201 is provided with a second-stage feeding solenoid valve for closing communication with the first-stage flash tank 101, and the second-stage feeding solenoid valve is opened and closed by a liquid level transmitter, so that feeding is realized by utilizing the self-absorption effect of negative pressure. It will be appreciated that a secondary feed solenoid valve may be provided in the conduit between the primary flash tank 101 and the secondary flash tank 201. The tertiary flash tank 301 is provided with a tertiary feeding solenoid valve for closing the communication with the secondary flash tank 201, and the tertiary feeding solenoid valve is opened and closed through the liquid level transmitter, and feeding is realized by utilizing the self-absorption effect of negative pressure. It will be appreciated that a three stage feed solenoid valve may be provided in the conduit between the two stage flash tank 201 and the three stage flash tank 301.

Through programming control, when one of the three feeding electromagnetic valves, such as the first-stage feeding electromagnetic valve, the second-stage feeding electromagnetic valve, the third-stage feeding electromagnetic valve and the like, is opened, the other two feeding electromagnetic valves are closed, so that the first-stage flash tank 101, the second-stage flash tank 201 and the third-stage flash tank 301 are respectively fed, and mutual gas communication among the first-stage flash tank 101, the second-stage flash tank 201 and the third-stage flash tank 301 is prevented, so that the pressure required by evaporation of each stage is maintained.

The first-stage gas-liquid separator 104 is provided with a second liquid level meter for monitoring the liquid level of the condensed water in the first-stage gas-liquid separator 104, the condensed water is discharged when the liquid level in the first-stage gas-liquid separator 104 reaches a set high liquid level, and the water is stopped being discharged when the liquid level is lower than a set low liquid level. The second-stage gas-liquid separator 204 is provided with a second liquid level meter for monitoring the liquid level of the condensed water in the second-stage gas-liquid separator 204, the condensed water is discharged when the liquid level in the second-stage gas-liquid separator 204 reaches a set high liquid level, and the water is stopped being discharged when the liquid level is lower than a set low liquid level. The third-stage gas-liquid separator 304 is provided with a second liquid level meter for monitoring the liquid level of the condensed water in the third-stage gas-liquid separator 304, the condensed water is discharged when the liquid level in the third-stage gas-liquid separator 304 reaches a set high liquid level, and the water is stopped being discharged when the liquid level is lower than a set low liquid level.

Further, the primary gas-liquid separator 104 is provided with a primary drainage solenoid valve which is opened and closed by a liquid level transmitter; the secondary gas-liquid separator 204 is provided with a secondary drainage electromagnetic valve which is opened and closed through a liquid level transmitter; the tertiary gas-liquid separator 304 is provided with a tertiary drain solenoid valve which is opened and closed by a liquid level transmitter.

Of course, it is understood that, in order to further enhance the concentration effect of the wastewater, the following design can be alternatively adopted: the number of the secondary treatment units is at least two, the primary secondary treatment unit is connected with the primary treatment unit in the manner, the last secondary treatment unit is connected with the tertiary treatment unit in the manner, two adjacent secondary flash tanks 201 are connected through a pipeline, and the waste water which is not evaporated in the previous secondary flash tank 201 is conveyed to the next secondary flash tank 201. Specifically, the secondary circulation pump 202 in the latter secondary treatment unit inputs the wastewater in the secondary flash tank 201 into the secondary condenser 203 in the former secondary treatment unit, the secondary condenser 203 in the former secondary treatment unit is used for heating the wastewater, and the heated wastewater enters the secondary flash tank 201 in the latter secondary treatment unit.

The invention relates to a multi-stage concentration treatment device which comprises a primary treatment unit, a secondary treatment unit, a vacuumizing unit, a heat pump unit, a condensed water discharge system, a concentrated solution discharge system and a cleaning system. The waste water input primary treatment unit of low concentration carries out elementary evaporation, remaining waste water input secondary treatment unit carries out secondary evaporation in the primary treatment unit, waste water obtains concentrate and comdenstion water after handling, the concentrate is discharged through discharge pump 600, the evacuation unit is used for discharging noncondensable gas as evacuation system, heat pump unit is used for providing the required heat of evaporation and the required cold volume of condensation as heat pump system, the comdenstion water that the comdenstion water discharge system produced, concentrate discharge system discharge concentrate, cleaning system washs the jar body.

Specifically, the heat pump unit comprises a heat pump condenser 100, a compressor 501 and a three-in-one gas-liquid separator 502, the whole system of the processing equipment is supplied with heat by the heat pump system, electric energy is consumed, extra steam or heat sources are not needed for supplying heat, heat is circularly exchanged, and the energy utilization rate is improved. The compressor 501 compresses low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas by performing work, and the high-temperature and high-pressure refrigerant gas is discharged and condensed into liquid in the heat pump condenser 100.

The primary treatment unit includes a primary flash tank 701, a primary circulation pump 702, a primary condenser 703, and a primary gas-liquid separator 704. Specifically, the primary circulation pump 702 is configured to pressurize the wastewater in the primary flash tank 701 and send the wastewater to the heat pump condenser 100, the heat pump condenser 100 is configured to heat the wastewater, the heated wastewater enters the primary flash tank 701, the heat pump condenser 100 heats the wastewater in a heat exchange manner, and the heated wastewater is flashed in the primary flash pump. The primary condenser 703 is used for condensing the steam in the primary flash tank 701, and the condensed material is sent to the primary gas-liquid separator 704, and the primary gas-liquid separator 704 is used for separating condensed water and non-condensable gas.

The secondary treatment unit comprises a secondary flash tank 801, a secondary circulation pump 802, a secondary condenser 803 and a secondary gas-liquid separator 804, wherein the secondary flash tank 801 is connected with the primary flash tank 701 through a pipeline, and waste water which is not evaporated in the primary flash tank 701 is conveyed into the secondary flash tank 801. Specifically, the secondary circulation pump 802 is configured to pressurize the wastewater in the secondary flash tank 801 to the primary condenser 703, the primary condenser 703 is configured to heat the wastewater and return the heated wastewater to the secondary flash tank 801, and the primary condenser 703 exchanges heat with the wastewater fed by the secondary circulation pump 802 by using the steam fed from the primary flash tank 701. The refrigerant condensate absorbs heat in the secondary condenser 803 and is evaporated into low-temperature and low-pressure steam for the compressor 501 to work in a compression mode, the secondary condenser 803 is used for condensing the steam in the secondary flash tank 801 and sending the condensed material to the secondary gas-liquid separator 804, and the secondary gas-liquid separator 804 is used for separating condensed water and non-condensed gas.

With reference to the drawings, it can be understood that the noncondensable gas separated by the primary gas-liquid separator 104, the secondary gas-liquid separator 204 and the tertiary gas-liquid separator 304 is conveyed to a vacuum pumping unit through a pipeline for subsequent treatment, specifically, the vacuum pumping unit includes a vacuum pump 403 and a gas-water separator 402, the vacuum pump 403 is used for conveying the noncondensable gas into the gas-water separator 402, the gas-water separator 402 is used for separating water and the noncondensable gas after the vacuum pump 403, the condensed water discharge system includes a negative pressure drain pump 401, and the negative pressure drain pump 401 is used for discharging the condensed water in the primary gas-liquid separator 104, the secondary gas-liquid separator 204 and the tertiary gas-liquid separator 304.

Further, the vacuum pumping unit comprises a cooler 404, the cooler 404 is communicated with the gas-water separator 402 through a pipeline, the negative pressure drainage pump 401 is used for replenishing water to the gas-water separator 402 through a pipeline, the cooler 404 is used for cooling the water in the gas-water separator 402, and the refrigerant from the secondary condenser 803 is used for cooling the water in the gas-water separator 402.

With reference to the drawings, it can be understood that the refrigerant flows in the processing equipment are in sequence of a compressor 501, a heat pump condenser 100, a three-in-one gas-liquid separator 502, a secondary condenser 803, a cooler 404, a three-in-one gas-liquid separator 502 and the compressor 501, and are circulated and reciprocated.

As will be appreciated with reference to the figures, the heat pump unit includes an air condenser 503, the air condenser 503 dissipating excess heat generated by the refrigerant processed by the compressor 501. Specifically, the surplus gaseous refrigerant generated by the compressor 501 enters the air condenser 503 through a pipeline, and after the air condenser 503 discharges heat, the refrigerant becomes liquid and is conveyed to the three-in-one gas-liquid separator 502 through a pipeline.

The negative pressure drainage pump 401 conveys cleaning water to the first-level flash tank 101, the second-level flash tank 201 and the third-level flash tank 301 through pipelines so as to clean all levels of processing units, no extra cleaning water is consumed, and water resources are saved. With reference to the drawings, the negative pressure drainage pump 401 is provided with a water outlet pipe 405, and the water outlet pipe 405 is used for discharging condensed water to the outside of a boundary area. It can be appreciated that the outlet of the negative pressure drain pump 401 has three points: firstly, draining water to the outside of a boundary area; supplementing water to the vacuum pump 403 and the gas-water separator 402 for the vacuum pump 403 to work; and thirdly, providing washing water.

In the description herein, references to the terms "one embodiment," "some examples," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like, if any, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.