阅读说明：本技术 一种分体式热泵蒸发结晶装置 (Split type heat pump evaporation crystallization device ) 是由 汪永财 王永军 李高 祝国成 邵立强 于 2019-11-19 设计创作，主要内容包括：本发明公开了一种分体式热泵蒸发结晶装置,包括热泵室和结晶室两部分,所述热泵室和结晶室通过冷风道和热风道连接,所述热泵室内依次设置回热器a、蒸发器、回热器b、冷凝器、压缩机和送风机,所述送风机的出风口与所述热风道连接；所述结晶室内设结晶器,所述结晶器自下而上设废液斗、废液结晶槽和板式过滤器,所述废液斗的排液口通过提升泵与废液结晶槽的布水系统连接。本发明的分体式热泵蒸发结晶装置通过热泵室和结晶室的分体式设计,解决了传统浓缩结晶装置能耗高、易腐蚀和使用寿命短的难题,同时具有能耗低、易操作、造价低、使用寿命长等优点。(The invention discloses a split type heat pump evaporative crystallization device, which comprises a heat pump chamber and a crystallization chamber, wherein the heat pump chamber and the crystallization chamber are connected through a cold air duct and a hot air duct; the crystallizer is arranged in the crystallization chamber, a waste liquid hopper, a waste liquid crystallization tank and a plate filter are arranged on the crystallizer from bottom to top, and a liquid discharge port of the waste liquid hopper is connected with a water distribution system of the waste liquid crystallization tank through a lift pump. The split type heat pump evaporation crystallization device solves the problems of high energy consumption, easy corrosion and short service life of the traditional concentration crystallization device through the split type design of the heat pump chamber and the crystallization chamber, and has the advantages of low energy consumption, easy operation, low manufacturing cost, long service life and the like.)

1. A split type heat pump evaporation crystallization device is characterized by comprising a heat pump chamber and a crystallization chamber, wherein the heat pump chamber and the crystallization chamber are connected through a cold air duct and a hot air duct;

the heat pump is characterized in that a heat regenerator a, an evaporator, a heat regenerator b, a condenser, a compressor and a blower are sequentially arranged in the heat pump chamber, the heat regenerator a is connected with the heat regenerator b, the evaporator is connected with the condenser, one end of the compressor is connected with an inlet of the evaporator, the other end of the compressor is connected with an outlet of the condenser, and an air outlet of the blower is connected with the hot air duct;

the crystallizer is arranged in the crystallization chamber, a waste liquid hopper, a waste liquid crystallization tank and a plate filter are arranged on the crystallizer from bottom to top, and a liquid discharge port of the waste liquid hopper is connected with a water distribution system of the waste liquid crystallization tank through a lift pump.

2. The split heat pump evaporative crystallization device of claim 1, wherein a water pan is disposed below the evaporator for collecting condensed water generated by the evaporator.

3. The split heat pump evaporative crystallization device of claim 1, wherein an expansion valve is provided between the evaporator and the condenser.

4. The split heat pump evaporative crystallization device of claim 1, wherein the hot air duct is connected to a hot air port at the bottom of the crystallizer.

5. The split heat pump evaporative crystallization device of claim 1, wherein the waste liquid crystallization tank is fixed on the inner wall of the crystallizer through a clamping groove.

6. The split heat pump evaporative crystallization device of claim 1, wherein the waste liquid crystallization tank is made of 304 stainless steel, and has a height of 30-50mm and a spacing of 15-20 mm.

7. The split heat pump evaporative crystallization device of claim 1, wherein the waste liquid crystallization tanks are not less than 2 groups.

8. The split-type heat pump evaporative crystallization device of claim 1, wherein the water distribution system is composed of a main pipe and branch pipes, and the branch pipes are correspondingly connected with the liquid inlet of the waste liquid crystallization tank.

9. The split-type heat pump evaporative crystallization device of claim 1, wherein the plate filter is a double-layer plate filter.

10. The split heat pump evaporative crystallization device of claim 1, wherein the housing of the split heat pump evaporative crystallization device is covered by a 20-25mm insulation board.

Technical Field

The invention belongs to the technical field of crystallization treatment devices, relates to an industrial wastewater concentration crystallization device, and particularly relates to a split type heat pump evaporation crystallization device.

Background

In the industries of electronics, electric power, chemical industry, seawater desalination and the like, the treatment of high-salinity wastewater is always a difficult point of environment-friendly water treatment. The wastewater is high in water hardness, strong in corrosivity, high in salt content and large in water quality fluctuation, enterprises in many local chemical industries and the like mainly depend on evaporation kettles, multi-effect evaporators, MVR evaporators and the like, all the salt evaporation crystallization equipment adopts steam heating, high-salt wastewater is in a negative pressure environment, then steam heating is filled into the salt evaporation crystallization equipment to enable the wastewater to boil, the boiling temperature is about 90 ℃, liquid in the wastewater is evaporated quickly, salt can be separated out from the liquid after the liquid evaporation to finally form crystallized salt, and the separation process of the salt and the liquid is completed.

However, the prior art generally carries out evaporation treatment on the waste water inside the introduction equipment through the power heating liner, and because of the particularity of water quality (high salt content and strong corrosivity), the salt evaporation crystallization equipment has high cost and limited service life, and meanwhile, the evaporation heating speed is low, the energy consumption is high, and the heating is not uniform, so that the waste water cannot be fully evaporated, and the practicability is poor.

The heat pump technology is a mature and energy-saving technology utilizing low-grade heat sources, is applied to recovering waste heat and preheating waste water, and is an effective method for saving energy consumption.

CN108147608A discloses a multi-effect evaporative crystallization system for treating power plant salt-containing wastewater by using compressed air and a heat pump, the system is characterized in that compressed air is led out from a gas power plant air separation device to assist in atomizing the power plant salt-containing wastewater, air (waste gas) after auxiliary atomization is used as a heat source of the heat pump and sent to a heat pump evaporator through a fan, the waste gas is cooled and dehumidified, waste heat is recovered, and condensed water of vapor in the air after condensation in the evaporator is periodically discharged; the method comprises the following steps that (1) pretreatment wastewater of a power plant firstly flows into a heat pump condenser to exchange heat with refrigerant steam for preheating; the preheated wastewater and the waste gas cooled and dehumidified by the evaporator are subjected to contact mass transfer concentration in a concentration chamber, and the concentrated wastewater with higher concentration flows into a multi-stage flash evaporation device for flash evaporation. The desalinated water produced in the flash evaporation process is collected to the water collecting tank, the circulating wastewater in the flash evaporation device flows into the spray chamber to be further atomized and concentrated by the aid of compressed air, the salt-containing wastewater is evaporated in the spray chamber until the salt-containing wastewater is completely crystallized, and the generated crystallized salt is accumulated at a discharge port at the bottom of the spray chamber and is periodically removed by the scraper. The invention fully utilizes waste heat, realizes the gradient utilization of energy and realizes the zero discharge of waste water of a power plant. However, the invention has complex structure and high cost, and is not suitable for the treatment of small-volume industrial waste liquid.

Disclosure of Invention

In view of the above, the present invention provides a split type heat pump evaporative crystallization apparatus, which solves the problems of high energy consumption, easy corrosion and short service life of the conventional concentration crystallization apparatus through the split type design of a heat pump chamber and a crystallization chamber, and has the advantages of low energy consumption, easy operation, low cost, long service life, etc.

In order to solve the technical problems, the invention provides a split type heat pump evaporative crystallization device which comprises a heat pump chamber and a crystallization chamber, wherein the heat pump chamber and the crystallization chamber are connected through a cold air duct and a hot air duct,

the heat pump is characterized in that a heat regenerator a, an evaporator, a heat regenerator b, a condenser, a compressor and a blower are sequentially arranged in the heat pump chamber, the heat regenerator a is connected with the heat regenerator b, the evaporator is connected with the condenser, one end of the compressor is connected with an inlet of the evaporator, the other end of the compressor is connected with an outlet of the condenser, and an air outlet of the blower is connected with the hot air duct;

the crystallizer is arranged in the crystallization chamber, a waste liquid hopper, a waste liquid crystallization tank and a plate filter are arranged on the crystallizer from bottom to top, and a liquid discharge port of the waste liquid hopper is connected with a water distribution system of the waste liquid crystallization tank through a lift pump.

Preferably, a water collecting tray is arranged below the evaporator and used for collecting condensed water generated by the evaporator.

Preferably, an expansion valve is arranged between the connection of the evaporator and the condenser.

Preferably, the hot air duct is connected with a hot air port at the bottom of the crystallizer.

Preferably, the waste liquid hopper is in a conical hopper shape, so that waste liquid is convenient to collect.

Preferably, the inlet of the lift pump is connected with the liquid outlet of the waste liquid hopper, and the outlet of the lift pump is connected with the water distribution system of the waste liquid crystallization tank.

Preferably, the waste liquid crystallizing tank is fixed on the inner wall of the crystallizer through a clamping groove, and after the crystallizing process is completed, the waste liquid crystal can be taken out by drawing the waste liquid crystallizing tank.

Preferably, the waste liquid crystallizing tank is made of 304 stainless steel materials, the height is 30-50mm, and the distance is 15-20mm, so that the waste liquid crystallizing tank is prevented from being difficult to take out due to the fact that irregular crystallisates block the space.

Preferably, the waste liquid crystallization tanks are not less than 2 groups.

Preferably, the water distribution system consists of a main pipe and branch pipes, and the branch pipes are correspondingly connected with a liquid inlet of the waste liquid crystallization tank.

The plate filter is a double-layer plate filter and is used for filtering substances which are easy to scale in waste liquid and preventing the substances which are easy to scale from being attached to other places to cause blockage or equipment corrosion.

Preferably, the shell of the split heat pump evaporative crystallization device is covered by a heat insulation plate with the thickness of 20-25 mm.

The invention has the beneficial effects that:

(1) the invention solves the problems of high energy consumption, easy corrosion and short service life of the traditional concentration crystallization device by the split design of the hot pump chamber and the crystallization chamber.

(2) The air is recycled in the whole process, the energy consumption is low, and in the whole evaporation and crystallization process, the heat temperature of a heat pump system is not higher than 90 ℃, and no waste gas escapes; the low conductivity of the collected condensed water can be directly discharged or reused for production. Compared with the prior art, the split evaporative crystallization device has the advantages of low energy consumption, easy operation, low manufacturing cost, long service life and the like.

Drawings

FIG. 1 is a schematic structural view of the present invention.

In the figure, 1, a heat pump chamber, 2, a crystallization chamber, 3, a cold air channel, 4, a hot air channel, 5, a heat insulation plate, 6, heat regenerators a and 7, an evaporator, 8, a water pan, 9, heat regenerators b and b, 10, an expansion valve, 11, a condenser, 12, a compressor, 13, a blower, 14, a crystallizer, 15, a waste liquid hopper, 16, a hot air port, 17, a waste liquid crystallization tank, 18, a plate filter, 19, a lifting pump, 20, a main pipe, 21, a branch pipe, 22 and a clamping groove.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should be noted that in the description of the present invention, the terms "one end", "the other end", "up", "down", "front end", "rear end", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The invention will now be described in further detail by way of specific embodiments with reference to fig. 1.

A split type heat pump evaporative crystallization device comprises a heat pump chamber 1 and a crystallization chamber 2, wherein the heat pump chamber 1 and the crystallization chamber 2 are connected through a cold air duct 3 and a hot air duct 4;

a heat regenerator a 6, an evaporator 7, a heat regenerator b 9, a condenser 11, a compressor 12 and a blower 13 are sequentially arranged in the heat pump chamber 1, the heat regenerator a 6 is connected with the heat regenerator b 9, the evaporator 7 is connected with the condenser 11, one end of the compressor 12 is connected with an inlet of the evaporator 7, the other end of the compressor is connected with an outlet of the condenser 11, and an air outlet of the blower 13 is connected with the hot air channel 4;

a crystallizer 14 is arranged in the crystallization chamber 2, a waste liquid hopper 15, a waste liquid crystallization tank 17 and a plate filter 18 are arranged on the crystallizer 14 from bottom to top, and a liquid discharge port of the waste liquid hopper 15 is connected with a water distribution system of the waste liquid crystallization tank 17 through a lift pump 19.

Preferably, a water receiving tray 8 is arranged below the evaporator 7 and used for collecting condensed water generated by the evaporator.

Preferably, an expansion valve 10 is arranged between the connection of the evaporator 7 and the condenser 11.

Preferably, the hot air duct 4 is connected with a hot air port 16 at the bottom of the crystallizer 14.

Preferably, the waste liquid hopper 15 is in a conical hopper shape, so that waste liquid is convenient to collect.

Preferably, the inlet of the lift pump 17 is connected with the liquid outlet of the waste liquid hopper 15, and the outlet is connected with the water distribution system of the waste liquid crystallization tank 17.

Preferably, the waste liquid crystallizing tank 17 is fixed on the inner wall of the crystallizer 14 through a clamping groove 22, and after the crystallization process is completed, the waste liquid crystal can be taken out by pulling the waste liquid crystallizing tank.

Preferably, the waste liquid crystallizing tank 17 is made of 304 stainless steel materials, the height is 30-50mm, and the distance is 15-20mm, so that the waste liquid crystallizing tank is prevented from being difficult to take out due to the fact that irregular crystals block the space.

Preferably, the waste liquid crystallizing tanks 17 are not less than 2 groups.

Preferably, the water distribution system is composed of a main pipe 20 and a branch pipe 21, and the branch pipe 21 is correspondingly connected with the liquid inlet of the waste liquid crystallization tank 17.

The plate filter 18 is a double-layer plate filter, and is used for filtering substances which are easy to scale in waste liquid, and preventing the substances which are easy to scale from being attached to other places to cause blockage or equipment corrosion.

Preferably, the shell of the split heat pump evaporative crystallization device is covered by a heat insulation plate 5 with the thickness of 20-25 mm.

The waste liquid is collected in a waste liquid hopper of the evaporator, lifted into a waste liquid crystallizing tank by a lifting pump, and the hot air sent by the heat pump chamber is contacted with the waste liquid in the waste liquid crystallizing tank, so that the temperature of the waste liquid is raised to form damp and hot air. The damp and hot air enters the hot pump chamber through the cold air duct, the temperature of the damp and hot air is lower than the dew point through the cooling mode, water vapor is condensed and discharged out of the system, the dehydrated air is heated up to become hot dry air again through the heating mode, the air is sent into the crystallizer of the crystallization chamber through the hot air duct through the air feeder, and the circulation is carried out until waste liquid is crystallized. In the crystallization process, the double-layer plate filter at the top of the crystallization chamber separates the crystallization chamber and is used for filtering substances which are easy to scale in waste liquid, preventing the substances which are easy to scale from being attached to other places to cause blockage or equipment corrosion, and after crystallization is completed, taking out waste liquid crystal substances through a pull waste liquid crystallization tank and cleaning and replacing the waste liquid crystallization tank.

The air is recycled in the whole process, the energy consumption is low, and in the whole evaporation and crystallization process, the heat temperature of a heat pump system is not higher than 90 ℃, and no waste gas escapes; the low conductivity of the collected condensed water can be directly discharged or reused for production. Compared with the prior art, the split evaporative crystallization device has the advantages of small occupied area, simple structure, low energy consumption, easy operation, low manufacturing cost, long service life and the like, and is suitable for treating small-volume industrial waste liquid.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.