Low temperature evaporation device

Abstract

The utility model discloses a low-temperature evaporation device, which includes an evaporation unit, a circulating water pool, a water source hot water machine, a water source hot air machine, a hot water circulation pump, a hot water pool, and a sewage circulation pump. The evaporation unit includes a cylinder, which also includes a sedimentation tank. The bottom of the tray is connected to the inlet of the sedimentation tank through a pipeline. The outlet of the sedimentation tank is connected to a salt discharge pipe, and a salt discharge control valve is installed on the salt discharge pipe. The overflow port of the sedimentation tank is connected to the inlet of the circulating water pool. Advantages: A sedimentation tank is added between the tray of the evaporation unit and the sewage circulating water pool. The sewage collected by the tray is first precipitated and separated by the sedimentation tank before entering the circulating water pool. The overflow water after precipitation enters the subsequent sewage circulating pump and related pipelines, reducing the concentration and density of the circulating water, thereby reducing the scaling, coking, and crystal blockage of the sewage circulating pump and its supporting pipelines, extending the service life of the equipment, and helping to improve the processing efficiency.

Description

Technical field:

[0001] The utility model relates to the technical field of low-temperature evaporation, in particular to a low-temperature evaporation device. Background technology:

[0002] During the operation of chemical enterprises, a lot of chemical wastewater is generated, which usually has the characteristics of high salt and high organic matter. Evaporation using evaporation equipment for salt separation is a common treatment process in this field. Patent CN202321827397.2 A low-density energy low-temperature evaporation waste heat recovery and utilization device, including a high-temperature clear water tank, a circulating water tank, a water source water heater, a waste heat release heat exchanger, a waste heat absorption heat exchanger and an evaporation unit; the cold medium outlet of the water source water heater is connected to the cold medium inlet of the waste heat release heat exchanger through a pipeline; the air outlet at the top of the evaporation unit is connected to the hot medium inlet of the waste heat absorption heat exchanger, the cold medium outlet of the waste heat absorption heat exchanger is connected to the hot medium inlet of the waste heat release heat exchanger, and the hot medium outlet of the waste heat release heat exchanger is connected to the cold medium inlet of the waste heat absorption heat exchanger; its advantages are: the utility model connects the waste heat release heat exchanger in series with the water source water heater to form a secondary heating system, which ensures the temperature of the evaporated sewage and reduces the load of the water source water heater; the evaporated water is condensed and recovered, and then after biochemical treatment, it can be used for dust removal and greening, reducing the company's fresh water consumption.

[0003] In addition, in order to make the salt and water separation more complete, a circulation pump is installed outside the evaporation unit to pump out the slurry at the bottom of the evaporation unit and then pump it into the upper part of the evaporation unit to achieve circulating evaporation. However, as the equipment runs, the salt content of the slurry at the bottom of the evaporation unit increases, and the sewage circulation pump and its supporting pipelines will frequently experience scaling, coking, crystal blockage and other problems, which shortens the equipment life and affects the treatment efficiency. Utility model content:

[0004] The purpose of the utility model is to provide a low-temperature evaporation device.

[0005] The utility model is implemented by the following technical scheme: a low-temperature evaporation device, which includes an evaporation unit, a circulating water pool, a water source water heater, a water source hot air blower, a hot water circulation pump, a hot water pool, and a sewage circulation pump. The evaporation unit includes a cylinder, and an activated carbon adsorption component, a demister, a water distributor, a tube array, an air distribution plate and a tray arranged in sequence from top to bottom inside the cylinder. It also includes a sedimentation tank, the bottom of the tray is connected to the inlet of the sedimentation tank through a pipeline, the outlet of the sedimentation tank is connected to a salt discharge pipe, a salt discharge control valve is installed on the salt discharge pipe, and the overflow port of the sedimentation tank is connected to the inlet of the circulating water pool.

[0006] Furthermore, a density meter is provided on the pipeline between the circulating water tank and the sewage circulating pump.

[0007] Furthermore, the tray is a conical structure.

[0008] The advantages of the utility model are as follows: a sedimentation tank is added between the tray of the evaporation unit and the sewage circulating water pool. The sewage collected by the tray is first precipitated and separated in the sedimentation tank before entering the circulating water pool. The overflow water after precipitation enters the subsequent sewage circulating pump and related pipelines, thereby reducing the concentration and density of the circulating water, thereby reducing scaling, coking, crystal blockage and the like of the sewage circulating pump and its supporting pipelines, extending the service life of the equipment, and helping to improve the treatment efficiency. Description of the drawings:

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0010] Evaporation unit 1, circulating water tank 2, water source water heater 3, water source hot air blower 4, hot water circulation pump 5, hot water tank 6, sewage circulation pump 7, cylinder 11, activated carbon adsorption component 12, demister 13, water distributor 14, tube array 15, air distribution plate 16, tray 17, sedimentation tank 8, salt discharge pipe 9, salt discharge control valve 10, density meter 101. Specific implementation method:

[0011] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0012] like Figure 1As shown, a low-temperature evaporation device includes an evaporation unit 1, a circulating water pool 2, a water source water heater 3, a water source hot air blower 4, a hot water circulation pump 5, a circulating water pool 2, and a sewage circulation pump 7. The evaporation unit 1 includes a cylinder 11, and an activated carbon adsorption component 12, a demister 13, a water distributor 14, a tube array 15, an air distribution plate 16 and a tray 17 arranged inside the cylinder 11 from top to bottom. The tray 17 is a conical structure. The inlet of the sewage circulation pump 7 is connected to the outlet of the circulating water pool 2, the outlet of the sewage circulation pump 7 is connected to the cold medium inlet of the water source water heater 3, and the cold medium outlet of the water source water heater 3 is connected to the inlet of the water distributor 14; the air outlet of the water source hot air fan 4 is connected to the cylinder 11 below the air distribution plate 16, the inlet of the hot water circulation pump 5 is connected to the outlet of the hot water pool 6, the outlet of the hot water circulation pump 5 is respectively connected to the heat medium inlets of the water source water heater 3 and the water source hot air fan 4, and the heat medium outlets of the water source water heater 3 and the water source hot air fan 4 are connected to the hot water pool 6.

[0013] It also includes a sedimentation tank 8, the bottom of the tray 17 is connected to the inlet of the sedimentation tank 8 through a pipeline, the outlet of the sedimentation tank 8 is connected to a salt discharge pipe 9, a salt discharge control valve 10 is installed on the salt discharge pipe 9, and the overflow port of the sedimentation tank 8 is connected to the inlet of the circulating water tank 2. A density meter 101 is arranged on the pipeline between the circulating water tank 2 and the sewage circulation pump 7.

[0014] Working process:

[0015] (1) Supplementing the wastewater to be evaporated into the circulating water pool 2 through the water supply pipe;

[0016] (2) Turn on the hot water circulation pump 5 to pump the clean water in the hot water pool 6 to the water source hot water machine 3 and the water source hot air blower 4 for heating the sewage and air;

[0017] (3) Turn on the sewage circulation pump 7, the sewage in the circulating water pool 2 is pumped to the water source water heater 3 for heating, and the heated sewage flows into the water distributor 14, and the sewage is sprayed into the tube array 15 by the water distributor 14 under high pressure, and the sewage forms a uniform water film in the tube array 15 and flows downward;

[0018] (4) The hot air blown into the tray 17 by the water source hot air blower 4 is evenly blown into the tube array 15 and flows upward under the regulation of the air distribution plate 16. The hot air forms heat exchange with the downward flowing water film, takes away the water molecules, and the humidity of the hot air increases;

[0019] (5) The wet air flows upward and is intercepted by the demister 13 to remove the large molecular water droplets. It is then adsorbed and purified by the activated carbon adsorption component 12 and discharged into the atmosphere.

[0020] (6) As the water in the downward flowing water film is taken away, the sewage concentration density increases and flows into the tray 17, and then flows into the sedimentation tank 8 from the bottom of the tray 17 for sedimentation; the high-density substances are precipitated to the bottom of the sedimentation tank 8, and the supernatant in the sedimentation tank 8 overflows into the circulating water tank 2, and then is repeatedly pumped into the evaporation unit 1 by the sewage circulation pump 7 for circulating evaporation;

[0021] (7) As the number of times the circulating water evaporates increases, the value displayed by the density meter 101 becomes larger and larger. When the set value is reached, salt crystals will be precipitated in the sedimentation tank 8, and the salt discharge control valve 10 will be opened to discharge the salt to the subsequent brine separation system.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A low-temperature evaporation device, comprising an evaporation unit, a circulating water pool, a water source hot water machine, a water source hot air machine, a hot water circulation pump, a hot water pool, and a sewage circulation pump, wherein the evaporation unit comprises a cylinder, and an activated carbon adsorption component, a demister, a water distributor, a tube array, an air distribution plate, and a tray arranged in sequence from top to bottom inside the cylinder; characterized in that: It also includes a sedimentation tank, the bottom of the tray is connected to the inlet of the sedimentation tank through a pipeline, the outlet of the sedimentation tank is connected to a salt discharge pipe, a salt discharge control valve is installed on the salt discharge pipe, and the overflow port of the sedimentation tank is connected to the inlet of the circulating water tank.

2. A low temperature evaporation device according to claim 1, characterized in that: A density meter is arranged on the pipeline between the circulating water tank and the sewage circulating pump.

3. A low temperature evaporation device according to claim 1, characterized in that: The tray is a conical structure.

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