High-salinity wastewater zero discharge equipment

Abstract

The invention discloses high-salinity wastewater zero discharge equipment which comprises a pretreatment device, the pretreatment device comprises a pretreatment tank and a first clear liquid pool, a first driving motor is arranged at the upper end of the pretreatment tank, a first stirring shaft is arranged at the lower end of the first driving motor, a first stirring paddle is arranged at the lower end of the first stirring shaft, and a second driving motor is arranged at the lower end of the first stirring paddle; the first clear liquid pool is connected with one end of the pretreatment tank and is used for placing clear liquid treated by the pretreatment tank; the MVR evaporator is connected with the first clear liquid tank and is used for evaporating and concentrating the concentrated liquid in the first clear liquid tank; and the evaporative crystallization device is connected with the MVR evaporator and is used for performing evaporative crystallization on the concentrated liquid discharged by the MVR evaporator. The high-salinity wastewater zero-discharge equipment provided by the invention can separate and extract high-valence ions, moisture and high-salinity crystals one by one, and realizes zero-discharge treatment, so that environmental pollution caused by discharge of high-salinity wastewater is avoided.

Description

Technical Field

[0001] The invention belongs to the field of wastewater treatment, and in particular relates to a high-salt wastewater zero-discharge device. Background Art

[0002] High-salt wastewater refers to wastewater with a total salt content of more than 1%, including industrial wastewater and agricultural product wastewater. The wastewater contains salt, organic matter, heavy metals, and even radioactive substances. It is produced in a wide range of ways and the amount of water is increasing year by year. It is mainly manifested in: high salt concentration, high osmotic pressure, and dehydration of microbial cells causing cell protoplasm separation. If this type of wastewater is directly discharged into the environment, it will cause great harm to environmental organisms. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a high-salt wastewater zero-discharge device.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A high-salinity wastewater zero-discharge device, comprising:

[0006] A pretreatment device, the pretreatment device comprising a pretreatment tank and a first clear liquid pool, the upper end of the pretreatment tank is provided with a first drive motor, the lower end of the first drive motor is provided with a first stirring shaft, the lower end of the first stirring shaft is provided with a first stirring paddle, the first clear liquid pool is connected to one end of the pretreatment tank and is used to place the clear liquid treated by the pretreatment tank;

[0007] An MVR evaporator, the MVR evaporator is connected to the first clear liquid tank and is used to evaporate and concentrate the concentrated liquid in the first clear liquid tank;

[0008] An evaporation crystallization device is connected to the MVR evaporator and is used for evaporating and crystallizing the concentrated solution discharged from the MVR evaporator.

[0009] Further, the MVR evaporator comprises:

[0010] An evaporator tank body, the evaporator tank body comprising a first heating chamber and a first evaporation chamber, the first heating chamber being arranged at the lower left end of the evaporation chamber, the lower end of the first heating chamber and the lower end of the first evaporation chamber being connected via a first connecting pipe, and the upper end of the first heating chamber and the middle of the left end of the first evaporation chamber being connected via a second connecting pipe;

[0011] A heating assembly, the heating assembly includes a first compressor and a plurality of first heating plates, the first heating plates are arranged in the first heating chamber, the upper end of the first heating plate passes through the first heating chamber and is provided with a first steam inlet, the first steam inlet and the upper end of the first evaporation chamber are connected through a third connecting pipe, and the first compressor is arranged on the third connecting pipe.

[0012] Furthermore, the heating assembly includes a distilled water tank and a first preheater, the first steam inlet is provided with a first steam pipe, the lower end of the first heating plate is provided with a first condensate pipe passing through the first heating chamber, the first condensate pipe is connected to one end of the distilled water tank, one end of the first preheater is connected to the other end of the distilled water tank, and the other end of the first preheater is connected to the first steam pipe.

[0013] Furthermore, a first feed pipe is provided at the lower end of the first connecting pipe, a second steam pipe is provided at the left end of the first feed pipe, and the second steam pipe is connected to the first preheater.

[0014] Further, the MVR evaporator includes a drainage assembly, which includes a first collecting bucket, a first hydrometer, a first valve and a second valve. The lower end of the first connecting pipe is provided with a first discharge pipe, the first collecting bucket is arranged below the first discharge pipe, one end of the first valve is connected to the first discharge pipe, the other end of the first valve is connected to the upper end of the first collecting bucket, the second valve is connected to the lower end of the first collecting bucket, the first hydrometer is arranged at the lower end of the first evaporation chamber, and the drainage assembly includes a first liquid level gauge, which is arranged in the first collecting bucket.

[0015] Furthermore, the evaporation crystallization device includes an evaporation tank and a plurality of first evaporation plates, wherein the first evaporation plates are arranged in the evaporation tank, a first heating plate is arranged at the lower end of the first evaporation plate, and the evaporation tank is connected to the first collecting barrel.

[0016] The high-salt wastewater zero-discharge equipment disclosed in the present invention has the beneficial effect, compared with the prior art, of collecting the water in the high-salt wastewater into the distilled water tank through the MVR evaporator and evaporating and collecting it, thus achieving zero-discharge treatment and avoiding environmental pollution caused by the discharge of high-salt wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a preferred embodiment provided by the present invention.

[0018] Figure 2 It is a structural schematic diagram of an MVR evaporator according to a preferred embodiment of the present invention.

[0019] Figure 3 It is a schematic structural diagram of an evaporator tank body according to a preferred embodiment of the present invention.

[0020] Figure 4 It is a schematic structural diagram of the first heating plate of a preferred embodiment provided by the present invention.

[0021] The reference numerals include: 110, first evaporation chamber; 120, first heating chamber; 130, first heating plate; 131, first steam pipe; 132, first condensate pipe; 210, first connecting pipe; 211, first feed pipe; 212, first discharge pipe; 220, second connecting pipe; 230, third connecting pipe; 240, first collecting bucket; 250, first liquid level gauge; 260, first hydrometer; 270, first valve; 280, second valve; 310, distilled water tank; 320, first preheater; 330, first compressor; 400, pretreatment tank; 410, first drive motor; 420, first stirring shaft; 430, first stirring paddle; 440, first clear liquid tank; 450, first solid waste tank; 500, evaporation tank; 510, first evaporation plate; 520, first heating plate. DETAILED DESCRIPTION

[0022] The invention discloses a high-salinity wastewater zero-discharge device. The specific implementation of the invention is further described below in conjunction with a preferred embodiment.

[0023] See attached figure Figure 1-4 , Figure 1 is a schematic structural diagram of a preferred embodiment provided by the present invention, Figure 2 : is a structural schematic diagram of an MVR evaporator of a preferred embodiment provided by the present invention, Figure 3 is a structural schematic diagram of an evaporator tank body of a preferred embodiment provided by the present invention, Figure 4 Schematic diagram of the structure of the first heating plate 130 according to the preferred embodiment of the present invention.

[0024] Preferred embodiments.

[0025] This embodiment provides a high-salinity wastewater zero-discharge device, comprising:

[0026] A pretreatment device, the pretreatment device comprises a pretreatment tank 400 and a first clear liquid pool 440, the upper end of the pretreatment tank 400 is provided with a first drive motor 410, the lower end of the first drive motor 410 is provided with a first stirring shaft 420, the lower end of the first stirring shaft 420 is provided with a first stirring paddle 430, the first clear liquid pool 440 is connected to one end of the pretreatment tank 400 and is used to place the clear liquid treated by the pretreatment tank 400;

[0027] An MVR evaporator, the MVR evaporator is connected to the first clear liquid tank 440 and is used to evaporate and concentrate the concentrated liquid in the first clear liquid tank 440;

[0028] An evaporation crystallization device is connected to the MVR evaporator and is used for evaporating and crystallizing the concentrated solution discharged from the MVR evaporator.

[0029] Further, the MVR evaporator comprises:

[0030] An evaporator tank body, the evaporator tank body comprising a first heating chamber 120 and a first evaporation chamber 110, the first heating chamber 120 being arranged at the lower left end of the evaporation chamber, the lower end of the first heating chamber 120 and the lower end of the first evaporation chamber 110 being connected via a first connecting pipe 210, and the upper end of the first heating chamber 120 and the middle of the left end of the first evaporation chamber 110 being connected via a second connecting pipe 220;

[0031] A heating component, the heating component includes a first compressor 330 and a plurality of first heating plates 130, the first heating plates 130 are arranged in the first heating chamber 120, the upper end of the first heating plate 130 passes through the first heating chamber 120 and is provided with a first steam inlet, the first steam inlet and the upper end of the first evaporation chamber 110 are connected through a third connecting pipe 230, and the first compressor 330 is arranged on the third connecting pipe 230.

[0032] Furthermore, the heating assembly includes a distilled water tank 310 and a first preheater 320, the first steam inlet is provided with a first steam pipe 131, the lower end of the first heating plate 130 passes through the first heating chamber 120 and is provided with a first condensate pipe 132, the first condensate pipe 132 is connected to one end of the distilled water tank 310, one end of the first preheater 320 is connected to the other end of the distilled water tank 310, and the other end of the first preheater 320 is connected to the first steam pipe 131.

[0033] Furthermore, a first feed pipe 211 is provided at the lower end of the first connecting pipe 210 , a second steam pipe is provided at the left end of the first feed pipe 211 , and the second steam pipe is connected to the first preheater 320 .

[0034] Further, the MVR evaporator includes a drainage assembly, which includes a first collecting barrel 240, a first hydrometer 260, a first valve 270 and a second valve 280. The lower end of the first connecting pipe 210 is provided with a first discharge pipe 212. The first collecting barrel 240 is arranged below the first discharge pipe 212. One end of the first valve 270 is connected to the first discharge pipe 212, and the other end of the first valve 270 is connected to the upper end of the first collecting barrel 240. The second valve 280 is connected to the lower end of the first collecting barrel 240. The first hydrometer 260 is arranged at the lower end of the first evaporation chamber 110. The drainage assembly includes a first liquid level meter 250, and the first liquid level meter 250 is arranged in the first collecting barrel 240.

[0035] Furthermore, the evaporation crystallization device includes an evaporation tank 500 and a plurality of first evaporation plates 510 , wherein the first evaporation plates 510 are disposed in the evaporation tank 500 , a first heating plate 520 is disposed at the lower end of the first evaporation plate 510 , and the evaporation tank 500 is connected to the first collecting barrel 240 .

[0036] The Gaoyan wastewater zero discharge method is:

[0037] Step 1: Put the high-salt wastewater into a pretreatment tank, add a coagulant, and adjust the pH of the high-salt wastewater so that the high-valent ions in the high-salt wastewater are precipitated and form insoluble particles together with impurities in the water. The first driving motor drives the first stirring paddle to stir and mix, so that the coagulant can mix with the high-salt wastewater more quickly, accelerate the precipitation of impurities and high-valent ions, and after coagulation treatment, put the upper clear liquid into the first clear liquid tank, and put the solid waste into the first solid waste tank;

[0038] Step 2: using the water in the distilled water tank 310 to generate steam under the heating of the first preheater 320, firstly passing the steam into the first heating chamber 120 and the first evaporation chamber 110 through the second steam pipe to preheat the first heating chamber 120 and the first evaporation chamber 110, and at the same time, passing the steam into the first heating plate 130 through the first steam pipe 131 to increase the temperature of the first heating plate 130;

[0039] Step 3: Use the first compressor 330 to form negative pressure in the first heating chamber 120 and the first evaporation chamber 110, and suck the high-salt wastewater in the first clear liquid pool into the evaporator tank. The first heating plate 130 evaporates the wastewater by contacting with the wastewater over a large area. The first heating chamber 120 heats the high-salt wastewater and generates a large amount of water vapor, which enters the upper end of the first evaporation chamber 110 through the second connecting pipe 220.

[0040] Step 4, the first compressor 330 compresses the low-temperature and low-pressure steam at the upper end of the first evaporation chamber 110 into high-temperature and high-pressure steam, and then enters the first heating plate 130 through the first steam inlet, and exchanges heat with the high-salinity wastewater through the first heating plate 130, and the steam is condensed and discharged, while the steam continues to heat and evaporate the water in the high-salinity wastewater, and evaporates repeatedly and uses steam for secondary evaporation until the high-salinity wastewater is fully concentrated and evaporated;

[0041] Step 5: Collect the fully concentrated high-salt wastewater through the first collecting box and put it into the evaporation tank. The high-salt wastewater flows through each of the first evaporation plates in turn. The first heating plate heats the first evaporation plate, thereby completely evaporating the water in the high-salt wastewater to obtain crystallized solid waste, and collect the solid waste into the first solid waste pool.

[0042] Therefore, this discharge equipment collects the moisture in the high-salt wastewater into the distilled water tank through the MVR evaporator, flocculates impurities such as high-valent ions, and evaporates and collects high-salt crystals, thereby achieving zero-discharge treatment to avoid environmental pollution caused by the discharge of high-salt wastewater.

[0043] It is worth mentioning that the technical features such as the first compressor involved in the patent application of the present invention should be regarded as the prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected according to the conventional selection in the field, and should not be regarded as the inventive point of the patent of the present invention. The patent of the present invention will not be further elaborated.

[0044] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-salinity wastewater zero discharge equipment, characterized in that: include: A pretreatment device, the pretreatment device comprising a pretreatment tank (400) and a first clear liquid pool (440), the upper end of the pretreatment tank (400) being provided with a first drive motor (410), the lower end of the first drive motor (410) being provided with a first stirring shaft (420), the lower end of the first stirring shaft (420) being provided with a first stirring paddle (430), the first clear liquid pool (440) being connected to one end of the pretreatment tank (400) and being used for placing clear liquid treated by the pretreatment tank (400); An MVR evaporator, the MVR evaporator being connected to the first clear liquid tank (440) and being used for evaporating and concentrating the concentrated liquid in the first clear liquid tank (440); An evaporation crystallization device is connected to the MVR evaporator and is used for evaporating and crystallizing the concentrated solution discharged from the MVR evaporator.

2. The high-salinity wastewater zero discharge equipment according to claim 1 is characterized in that: The MVR evaporator comprises: An evaporator tank body, the evaporator tank body comprising a first heating chamber (120) and a first evaporation chamber (110), the first heating chamber (120) being arranged at the lower left end of the evaporation chamber, the lower end of the first heating chamber (120) and the lower end of the first evaporation chamber (110) being connected via a first connecting pipe (210), and the upper end of the first heating chamber (120) and the middle of the left end of the first evaporation chamber (110) being connected via a second connecting pipe (220); A heating component, the heating component comprising a first compressor (330) and a plurality of first heating plates (130), the first heating plates (130) being arranged in the first heating chamber (120), the upper end of the first heating plate (130) passing through the first heating chamber (120) being provided with a first steam inlet, the first steam inlet and the upper end of the first evaporation chamber (110) being connected via a third connecting pipe (230), and the first compressor (330) being arranged on the third connecting pipe (230).

3. The high-salinity wastewater zero discharge equipment according to claim 2 is characterized in that: The heating component includes a distilled water tank (310) and a first preheater (320), the first steam inlet is provided with a first steam pipe (131), the lower end of the first heating plate (130) passes through the first heating chamber (120) and is provided with a first condensate pipe (132), the first condensate pipe (132) is connected to one end of the distilled water tank (310), one end of the first preheater (320) is connected to the other end of the distilled water tank (310), and the other end of the first preheater (320) is connected to the first steam pipe (131).

4. The high-salinity wastewater zero discharge equipment according to claim 3 is characterized in that: A first feed pipe (211) is provided at the lower end of the first connecting pipe (210), a second steam pipe is provided at the left end of the first feed pipe (211), and the second steam pipe is connected to the first preheater (320).

5. The high-salinity wastewater zero discharge equipment according to claim 4 is characterized in that: The MVR evaporator comprises a drainage assembly, which comprises a first collecting barrel (240), a first hydrometer (260), a first valve (270) and a second valve (280); a first discharge pipe (212) is provided at the lower end of the first connecting pipe (210); the first collecting barrel (240) is arranged below the first discharge pipe (212); one end of the first valve (270) is connected to the first discharge pipe (212); the other end of the first valve (270) is connected to the upper end of the first collecting barrel (240); the second valve (280) is connected to the lower end of the first collecting barrel (240); the first hydrometer (260) is arranged at the lower end of the first evaporation chamber (110); and the drainage assembly comprises a first liquid level meter (250); and the first liquid level meter (250) is arranged in the first collecting barrel (240).

6. The high-salinity wastewater zero discharge equipment according to claim 5 is characterized in that: The evaporation crystallization device comprises an evaporation tank (500) and a plurality of first evaporation plates (510), wherein the first evaporation plates (510) are arranged in the evaporation tank (500), a first heating plate (520) is arranged at the lower end of the first evaporation plate (510), and the evaporation tank (500) is connected to the first collecting barrel (240).

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