A device for concentrating high-salt wastewater

Abstract

The present invention relates to a device for concentrating high-salinity wastewater, comprising a device body, a water receiving tray is arranged in the device body, an air inlet channel is arranged on one side of the water receiving tray, an air outlet channel is arranged above the water receiving tray, a primary filter device, a secondary filter device, a first dehumidifier and a heater are arranged in sequence in the air inlet channel, and the heater is close to the water receiving tray; an adsorption device, a water separator, a fan and a second dehumidifier are arranged in sequence in the air outlet channel, and the adsorption device is close to the water receiving tray, and the water receiving tray is connected to the water separator to provide wastewater to the water separator. The device for concentrating high-salinity wastewater provided by the present invention has a relatively simple structure, small investment, convenient operation, small footprint and high evaporation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a device for concentrating high-salt wastewater. Background Art

[0002] At present, the concentration of high-salt wastewater adopts low-temperature evaporation method. The equipment required in the low-temperature evaporation method includes multiple-effect evaporators, boilers and other medium and large equipment. Therefore, the investment is large, the operation is troublesome, the area is large and the evaporation efficiency is low. Summary of the invention

[0003] The purpose of the present invention is to provide a device for concentrating high-salt wastewater to solve the above-mentioned technical problems.

[0004] The technical solution of the present application is: a device for concentrating high-salt wastewater, comprising a device body, a water receiving tray is arranged in the device body, an air inlet channel is arranged on one side of the water receiving tray, an air outlet channel is arranged above the water receiving tray, a primary filter device, a secondary filter device, a first dehumidifier and a heater are arranged in sequence in the air inlet channel, and the heater is close to the water receiving tray; an adsorption device, a water separator, a fan and a second dehumidifier are arranged in sequence in the air outlet channel, the adsorption device is close to the water receiving tray, and the water receiving tray is connected to the water separator for providing wastewater to the water separator.

[0005] Preferably, the air outlet channel includes a vertically arranged first channel and a horizontally arranged second channel and a third channel, the first channel is close to the water receiving tray; the second channel is connected to the first channel, the third channel is connected to the second channel, the diameter of the second channel is smaller than the diameter of the third channel, the fan is located in the first channel, and the second dehumidifier is located in the third channel; a water baffle is provided on the second channel, and the bottom end of the third channel is connected to the water receiving tray.

[0006] Preferably, three water baffles are provided on the second channel, and water troughs are formed between adjacent water baffles, and the water troughs are communicated with the water receiving tray.

[0007] Preferably, a first metal mesh water retainer is provided in the first channel above the fan, a second metal mesh water retainer is provided in the third channel, and the second metal mesh water retainer is located on a side of the second dehumidifier close to the second channel.

[0008] Preferably, it also includes an evaporator and a condenser, the first dehumidifier and the evaporator are connected to form a first heat exchange circuit, the second dehumidifier and the evaporator are connected to form a second heat exchange circuit; the evaporator and the condenser are connected to form a third heat exchange circuit; the condenser is connected to the water receiving pan and the water separator to form a fourth heat exchange circuit; the third heat exchange circuit is provided with a compressor and an expansion valve; the fourth heat exchange circuit is installed with a centrifugal separator, and the centrifugal separator is located between the condenser and the water receiving pan.

[0009] Preferably, a water inlet pipe is provided on the device body, the water inlet pipe extends into the device body, and a valve is provided on the water inlet pipe.

[0010] Preferably, the valve is a float valve.

[0011] Preferably, the first channel is recessed inward at the position of the fan to form an arc surface, the first metal mesh water interceptor is arranged at the top of the arc surface, and the edge is connected to the arc surface; the fan is arranged in the middle of the arc surface, and the water divider is located below the arc surface.

[0012] Preferably, the adsorption device is a filler.

[0013] The device for concentrating high-salt wastewater provided by the present invention, when in use, the high-salt wastewater flows into the water receiving tray through the water inlet pipe, and then is atomized and sprayed into the filler through the water separator to form a water film; the fan is started, and the air passes through the primary filter device and the secondary filter device to filter the air clean, and then passes through the first dehumidifier to remove the water vapor in the air, and then is heated to a predetermined temperature by the heater to turn it into hot air, and the hot air passes through the filler to take away the water vapor on the surface of the water film, forming a mixed gas of water vapor and air, and the mixed gas is discharged after the water vapor is removed by the second dehumidifier, wherein the gas can be discharged to the primary filter or the heater before recycling, and the water vapor generated by the dehumidification of the second dehumidifier can be recycled. In this process, the evaporation of the water film by dry air will cause the wastewater to be continuously concentrated, so that it is continuously circulated and concentrated, and finally reaches the preset requirements, and the wastewater with the required high concentration can also be discharged to other devices such as the positive air evaporation salt separation device for further evaporation and salt precipitation; the high-concentration wastewater can be separated by a centrifugal separator to separate the crystallized salt.

[0014] The device for concentrating high-salt wastewater provided by the present invention has a relatively simple structure, small investment, convenient operation, small footprint and high evaporation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a treatment system used in the device for concentrating high-salinity wastewater provided by the present invention, wherein arrows are used to schematically indicate the flow direction of gas or liquid;

[0016] The accompanying drawings are numerals in the figure: device body 1, water receiving tray 2, air inlet channel 3, air outlet channel 4, first channel 4-1, second channel 4-2, third channel 4-3, primary filtering device 5, secondary filtering device 6, first dehumidifier 7, heater 8, adsorption device 9, water separator 10, fan 11, second dehumidifier 12, water baffle 13, water tank 14, evaporator 15, condenser 16, compressor 17, expansion valve 18, centrifugal separator 19, water inlet pipe 20, float valve 21, first metal mesh water blocker 22, second metal mesh water blocker 23. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] See also Figure 1 The present invention provides a device for concentrating high-salt wastewater, comprising a device body 1, characterized in that a water receiving tray 2 is arranged in the device body, an air inlet channel 3 is arranged on one side of the water receiving tray, an air outlet channel 4 is arranged above the water receiving tray, a primary filtering device 5, a secondary filtering device 6, a first dehumidifier 7 and a heater 8 are arranged in sequence in the air inlet channel, and the heater is close to the water receiving tray; an adsorption device 9, a water separator 10, a fan 11 and a second dehumidifier 12 are arranged in sequence in the air outlet channel, the adsorption device is close to the water receiving tray, the water receiving tray is connected to the water separator for providing wastewater to the water separator, wherein the adsorption device is used to attach water droplets to form a water film, wherein the adsorption device can use fillers, and in order to facilitate the sewage to enter the water receiving tray, a water inlet pipe 20 is arranged on the device body, the water inlet pipe extends into the device body, and a valve is arranged on the water inlet pipe, wherein the valve is preferably a float valve 21.

[0019] The above-mentioned device for concentrating high-salt wastewater, when in use, high-salt wastewater flows into the water receiving tray through the water inlet pipe and is atomized and sprayed into the filler through the water separator to form a water film; start the fan, the air passes through the primary filter device and the secondary filter device to filter the air, and then passes through the first dehumidifier to remove the water vapor in the air, and then is heated to a predetermined temperature by the heater to turn it into hot air. The hot air passes through the filler to take away the water vapor on the surface of the water film, forming a mixed gas of water vapor and air, and the mixed gas is discharged after the water vapor is removed by the second dehumidifier, wherein the gas can be discharged to the primary filter or the heater for recycling, and the water vapor generated by the dehumidification of the second dehumidifier can be recycled. In this process, the evaporation of the water film by dry air will cause the wastewater to be continuously concentrated, so that it continues to circulate and concentrate, and finally reaches the preset requirements. The wastewater with the required high concentration can also be discharged to other devices such as the positive air evaporation salt separation device for further evaporation and salt precipitation; the high-concentration wastewater can be separated by a centrifugal separator to separate the crystallized salt.

[0020] The structure is relatively simple, with small investment, convenient operation, small footprint and high evaporation efficiency.

[0021] As a preferred embodiment, the air outlet channel includes a vertically arranged first channel 4-1, a horizontally arranged second channel 4-2 and a horizontally arranged third channel 4-3, the first channel is close to the water receiving tray; the second channel is connected to the first channel, and the third channel is connected to the second channel, the diameter of the second channel is smaller than the diameter of the third channel, so that the second channel and the third channel form a step to facilitate water to flow downward, the fan is located in the first channel, and the second dehumidifier is located in the third channel; a water baffle 13 is provided on the second channel, and the bottom end of the third channel is connected to the water receiving tray. Preferably, three water baffles are provided on the second channel, and a water trough 14 is formed between adjacent water baffles, and the water trough is connected to the water receiving tray, such as Figure 1 As shown, the three water retaining plates can be set with increasing heights from left to right to facilitate step-by-step water retaining. When the mixed gas passes through this structure, small water droplets are produced due to the condensation of water vapor, which are blocked after reaching the water retaining plates and eventually flow back to the water receiving tray to be processed again, thereby preventing the air from carrying sewage vapor through the second dehumidifier, increasing the burden on the second dehumidifier, and even causing the sewage vapor carried by the air to be discharged.

[0022] As a preferred embodiment, a first metal mesh water interceptor 22 is provided in the first channel above the fan, a second metal mesh water interceptor 23 is provided in the third channel, and the second metal mesh water interceptor is located on the side of the second dehumidifier close to the second channel. By providing the metal mesh water interceptor, water vapor in the mixed gas is more easily intercepted, especially in combination with a water baffle, the effect is better.

[0023] As a preferred embodiment, the device for concentrating high-salinity wastewater also includes an evaporator 15 and a condenser 16, wherein the first dehumidifier and the evaporator are connected to form a first heat exchange loop, and the second dehumidifier and the evaporator are connected to form a second heat exchange loop; the evaporator and the condenser are connected to form a third heat exchange loop; the condenser is connected to the water receiving tray and the water separator to form a fourth heat exchange loop; the third heat exchange loop is provided with a compressor 17 and an expansion valve 18; the fourth heat exchange loop is provided with a centrifugal separator 19, and the centrifugal separator is located between the condenser and the water receiving tray. The chilled water in the evaporator can be used for condensation and dehumidification of air; the condenser heats the circulating water, and the refrigerant itself is phase-changed into a high-temperature and high-pressure gas, and then the refrigerant is depressurized by the expansion valve to the evaporator to become a low-temperature and low-pressure liquid, and the heated chilled water evaporates to become a low-temperature and low-pressure gas, and the low-temperature and low-pressure gas is compressed by the compressor into a high-temperature and high-pressure gas and then enters the condenser to heat the circulating high-salinity wastewater material, and this process becomes a high-temperature and high-pressure liquid, and so on. In this way, multiple heat exchange loops are formed to achieve energy recovery and utilization. Of course, a heater can also be directly installed on the connecting pipe between the water distributor and the water receiving tray to provide a heat source for the operation of the equipment.

[0024] As a preferred embodiment, the first channel is recessed inward at the position of the fan to form an arc surface, the first metal mesh water retainer is arranged at the top of the arc surface, and the edge is connected to the arc surface; the fan is arranged in the middle of the arc surface, and the water separator is located below the arc surface. When the mixed gas passes through this structure, the mixed gas is restricted and compressed by the arc surface, which increases the density of the mixed gas and speeds up the flow speed of the mixed gas to facilitate the collision of water molecules, making it easier for water vapor to condense into water droplets and be blocked, further preventing the air from carrying sewage vapor through the second dehumidifier to increase the burden of the second dehumidifier, and even causing the air to carry sewage vapor to be discharged.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The words "first" and "second" are only used to distinguish the names and are not intended to limit the technical terms. For those skilled in the art, the present invention may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for concentrating high-salinity wastewater, comprising a device body (1), characterized in that: A water receiving tray (2) is provided in the body of the device, an air inlet channel (3) is provided on one side of the water receiving tray, an air outlet channel (4) is provided above the water receiving tray, a primary filter device (5), a secondary filter device (6), a first dehumidifier (7) and a heater (8) are sequentially provided in the air inlet channel, and the heater is close to the water receiving tray; An adsorption device (9), a water separator (10), a fan (11) and a second dehumidifier (12) are sequentially arranged in the air outlet channel, the adsorption device being close to the water receiving tray, the water receiving tray being connected to the water separator for providing waste water to the water separator; The air outlet channel comprises a first channel (4-1) arranged vertically and a second channel (4-2) and a third channel (4-3) arranged horizontally, wherein the first channel is close to the water receiving tray; The second channel is communicated with the first channel, the third channel is communicated with the second channel, the diameter of the second channel is smaller than the diameter of the third channel, the fan is located in the first channel, and the second dehumidifier is located in the third channel; A water baffle (13) is provided on the second channel, and the bottom end of the third channel is connected to the water receiving tray; A first metal mesh water retainer (22) is arranged above the fan in the first channel, a second metal mesh water retainer (23) is arranged in the third channel, and the second metal mesh water retainer is located on a side of the second dehumidifier close to the second channel; The first channel is recessed inward at the position of the fan to form an arc surface, and the first metal mesh water retainer is arranged on the top of the arc surface, and the edge is connected to the arc surface; The fan is arranged in the middle of the arc surface, and the water divider is located below the arc surface.

2. The device for concentrating high-salinity wastewater according to claim 1, characterized in that: Three water baffles are arranged on the second channel, and a water trough (14) is formed between adjacent water baffles, and the water trough is connected to the water receiving tray.

3. The device for concentrating high-salt wastewater according to claim 1, characterized in that: It also includes an evaporator (15) and a condenser (16), wherein the first dehumidifier and the evaporator are connected to form a first heat exchange circuit, and the second dehumidifier and the evaporator are connected to form a second heat exchange circuit; The evaporator and the condenser are connected to form a third heat exchange loop; The condenser is connected to the water receiving pan and the water separator to form a fourth heat exchange loop; The third heat exchange circuit is provided with a compressor (17) and an expansion valve (18); A centrifugal separator (19) is installed on the fourth heat exchange circuit, and the centrifugal separator is located between the condenser and the water receiving tray.

4. The device for concentrating high-salt wastewater according to claim 1, characterized in that: A water inlet pipe (20) is provided on the device body, the water inlet pipe extends into the device body, and a valve is provided on the water inlet pipe.

5. The device for concentrating high-salt wastewater according to claim 4, characterized in that: The valve is a float valve (21).

6. The device for concentrating high-salinity wastewater according to claim 1, characterized in that: The adsorption device is a filler.

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