Low-temperature evaporation treatment zero-emission device for ammonia-nitrogen wastewater treatment

Abstract

The invention discloses a low-temperature evaporation treatment zero discharge device for ammonia nitrogen wastewater treatment, which comprises a wastewater collection device, a low-temperature evaporation device, a concentrated solution collection tank and a drainage device, a waste liquid inlet pipe is arranged on the outer surface of the wastewater collection device, and a PH adjusting tank is arranged between the wastewater collection device and the low-temperature evaporation device. A first centrifugal pump and a second centrifugal pump are arranged on the two sides of the PH adjusting tank respectively, wastewater in the PH adjusting tank is pumped from the wastewater collecting device to the PH adjusting tank through the first centrifugal pump, the wastewater is pumped from the PH adjusting tank to the low-temperature evaporation device through the second centrifugal pump, and the water production end of the low-temperature evaporation device is connected with a drainage device and a concentrated solution collecting tank. A dosing device is arranged on the PH adjusting tank. The method has the beneficial effects that the purpose of treating the ammonia-nitrogen wastewater is achieved, the treatment effect is good, the cost is effectively reduced, the treatment process flow is short, the operation flow is simple, the treatment efficiency is relatively high, and the purification effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of ammonia nitrogen wastewater, and in particular to a zero-emission device for treating ammonia nitrogen wastewater by low-temperature evaporation. Background Art

[0002] The low-temperature evaporation treatment device for ammonia nitrogen wastewater is a device for treating ammonia nitrogen wastewater. It is treated by low-temperature evaporation equipment after adjusting the pH. It has good effect in treating ammonia nitrogen wastewater and effectively reduces costs. The treatment process is short and the operation process is simple.

[0003] Existing ammonia nitrogen wastewater treatment devices have low efficiency, high cost and poor purification effect;

[0004] Therefore, it is necessary to invent a zero-emission device for treating ammonia nitrogen wastewater by low-temperature evaporation to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems and to design a zero-emission device for treating ammonia nitrogen wastewater by low-temperature evaporation.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is a zero-emission device for low-temperature evaporation treatment of ammonia nitrogen wastewater, comprising a wastewater collecting device, a low-temperature evaporation device, a concentrated liquid collecting tank, and a drainage device. A waste liquid inlet pipe is provided on the outer surface of the wastewater collecting device, a pH adjusting tank is provided between the wastewater collecting device and the low-temperature evaporation device, and a first centrifugal pump and a second centrifugal pump are provided on both sides of the pH adjusting tank. The wastewater in the pH adjusting tank is pumped from the wastewater collecting device to the pH adjusting tank by the first centrifugal pump, and the second centrifugal pump pumps the wastewater from the pH adjusting tank to the low-temperature evaporation device. The water production end of the low-temperature evaporation device is connected to the drainage device and the concentrated liquid collecting tank, and a dosing device is provided on the pH adjusting tank.

[0007] As a further supplement to the technical solution, a wastewater mixer is provided inside the pH adjustment tank.

[0008] As a further supplement to the technical solution, an oxalic acid dosing device is provided on the pH adjusting tank, and a diaphragm pump is provided on the oxalic acid dosing device, and the diaphragm pump is connected to the pH adjusting tank.

[0009] As a further supplement to the technical solution, a dosing stirrer is provided inside the oxalic acid dosing device.

[0010] As a further supplement to the technical solution, the wastewater collection equipment includes a wastewater collection tank, and the waste liquid inlet pipe is arranged on one side of the wastewater collection tank.

[0011] As a further supplement to the technical solution, the low-temperature evaporation equipment includes a low-temperature evaporator.

[0012] As a further supplement to the technical solution, the drainage equipment includes a drainage tank.

[0013] Its beneficial effect is that the purpose of ammonia nitrogen wastewater treatment is achieved through the process of wastewater collection equipment, wastewater and dosing mixer, oxalic acid dosing device, pH adjustment tank, centrifugal pump, diaphragm pump, low-temperature evaporation equipment, concentrate collection barrel, and drainage equipment, achieving good treatment effect, effectively reducing costs, short treatment process, simple operation process, high treatment efficiency, and good purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] In the figure, 1. wastewater collection equipment; 2. PH adjustment tank; 3. low-temperature evaporation equipment; 4. concentrate collection tank; 5. drainage equipment; 6. oxalic acid dosing device; 71. wastewater mixer; 72. dosing mixer; 8. diaphragm pump; 91. first centrifugal pump; 92. second centrifugal pump. DETAILED DESCRIPTION

[0016] In order to make the technical solution more clear to those skilled in the art, Figure 1 The technical solution of the present invention is described in detail:

[0017] A zero-emission device for treating ammonia nitrogen wastewater by low-temperature evaporation, comprising a wastewater collecting device 1, a low-temperature evaporating device 3, a concentrated liquid collecting tank 4, and a drainage device 5. The wastewater collecting device 1 is provided with a waste liquid inlet pipe on its outer surface, which is connected to the corresponding wastewater pipeline in the factory to collect wastewater. The waste liquid inlet pipe collects the corresponding ammonia nitrogen wastewater and collects it in the wastewater collecting tank for storage. A pH regulating tank 2 is provided between the wastewater collecting device 1 and the low-temperature evaporating device 3. A first centrifugal pump 91 and a second centrifugal pump 92 are provided on both sides of the pH regulating tank 2. The wastewater in the pH adjusting tank 2 is pumped from the wastewater collecting device 1 to the pH adjusting tank 2 by the first centrifugal pump 91, and the second centrifugal pump 92 pumps the wastewater from the pH adjusting tank 2 to the low-temperature evaporation device 3. The water production end of the low-temperature evaporation device 3 is connected to the drainage device 5 and the concentrate collecting tank 4. The concentrate collecting tank 4 is used to store the wastewater concentrate treated by the low-temperature evaporation device 3. The drainage tank is used as a storage point for the treated wastewater. A water pump can be installed to reuse the drainage tank water. The pH adjusting tank 2 is provided with a dosing device.

[0018] Among them, a wastewater mixer 71 is provided inside the PH adjustment tank 2, and the wastewater mixer 71 can stir the wastewater and the reagent added by the dosing device; after the ammonia nitrogen wastewater is collected, the first centrifugal pump 91 at the rear end of the wastewater collection tank is used to pump the wastewater from the wastewater collection tank to the PH adjustment tank 2 to adjust the PH of the potassium permanganate wastewater. The PH adjustment this time uses acid adjustment, and the PH can be adjusted to between 5 and 6. A wastewater mixer 71 is installed inside the PH adjustment tank, and its function is to promote the full mixing and reaction of the acid and the wastewater. When the PH adjustment is qualified, the second centrifugal pump 92 at the rear end of the PH adjustment tank 2 is used to pump the adjusted wastewater to the low-temperature evaporator. The second centrifugal pump 92 is used to provide power for the feed of the low-temperature evaporator.

[0019] Among them, an oxalic acid dosing device 6 is provided on the pH adjusting tank 2, and a diaphragm pump 8 is provided on the oxalic acid dosing device 6. The diaphragm pump 8 is connected to the pH adjusting tank 2, and the diaphragm pump 8 can pump the agent in the oxalic acid dosing device 6 into the pH adjusting tank 2.

[0020] In order to better exert the effect of the agent in the oxalic acid dosing device 6, a dosing stirrer 72 is provided inside the oxalic acid dosing device 6 to stir the agent so that it is fully blended.

[0021] In detail, the wastewater collection equipment 1 includes a wastewater collection tank, and the waste liquid inlet pipe is arranged on one side of the wastewater collection tank, wherein the low-temperature evaporation equipment 3 includes a low-temperature evaporator, and the drainage equipment 5 includes a drainage tank; the low-temperature evaporator is a method and device for effectively suppressing the generation of thermal stress, and thermal stress will be generated when a heat exchanger that heats a low-temperature liquid is started and slowly cooled; in the method of slow cooling in a heat exchanger equipped with an inlet chamber, a low-temperature liquid is sent into the inlet chamber, and the low-temperature liquid is sprayed in the inlet chamber, and its flow rate during the slow cooling process is lower than that during normal operation; the low-temperature evaporator equipment is operated to reduce the amount of wastewater, and the wastewater impurities are concentrated and discharged to the concentrated liquid collection tank 4 at the rear end for storage, and the treated clean water is discharged to the drainage tank.

[0022] The working principle of the present invention will be described in detail below: When using the device, water is collected by the wastewater collection device 1 - the pH is adjusted by the pH adjustment tank 2 - the low-temperature evaporation device 3 is used for reduction treatment - drainage. Specifically, after the ammonia nitrogen wastewater is collected, the first centrifugal pump 91 at the rear end of the wastewater collection device 1 pumps the wastewater from the wastewater collection device 1 to the pH adjustment tank 2, and then the pH of the ammonia nitrogen wastewater is adjusted, and hydraulic stirring and mixing are performed by the wastewater mixer 7 inside the pH adjustment tank 2. When the pH adjustment is qualified, the second centrifugal pump 92 at the rear end of the pH adjustment tank 2 pumps the wastewater to the low-temperature evaporation device 3 for treatment. After the treatment is completed, the impurities in the wastewater are concentrated and discharged to the concentrated liquid collection tank 4 at the rear end for storage, and the treated clean water is discharged to the drainage device 5.

[0023] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A zero-emission device for low-temperature evaporation of ammonia nitrogen wastewater, characterized in that: The invention comprises a wastewater collection device (1), a low-temperature evaporation device (3), a concentrated liquid collection tank (4), and a drainage device (5). The wastewater collection device (1) is provided with a waste liquid inlet pipe on its outer surface. A pH adjustment tank (2) is provided between the wastewater collection device (1) and the low-temperature evaporation device (3). A first centrifugal pump (91) and a second centrifugal pump (92) are provided on both sides of the pH adjustment tank (2). The wastewater in the pH adjustment tank (2) is pumped from the wastewater collection device (1) to the pH adjustment tank (2) by the first centrifugal pump (91). The second centrifugal pump (92) pumps the wastewater from the pH adjustment tank (2) to the low-temperature evaporation device (3). The water production end of the low-temperature evaporation device (3) is connected to the drainage device (5) and the concentrated liquid collection tank (4). The pH adjustment tank (2) is provided with a dosing device.

2. A zero-emission device for low-temperature evaporation treatment of ammonia nitrogen wastewater according to claim 1, characterized in that: A wastewater mixer (71) is provided inside the pH adjustment tank (2).

3. A zero-emission device for low-temperature evaporation of ammonia nitrogen wastewater according to claim 2, characterized in that: The pH regulating tank (2) is provided with an oxalic acid dosing device (6), and the oxalic acid dosing device (6) is provided with a diaphragm pump (8), and the diaphragm pump (8) is connected to the pH regulating tank (2).

4. A zero-emission device for low-temperature evaporation treatment of ammonia nitrogen wastewater according to claim 3, characterized in that: The oxalic acid dosing device (6) is provided with a dosing stirrer (72) inside.

5. A zero-emission device for low-temperature evaporation treatment of ammonia nitrogen wastewater according to claim 1, characterized in that: The wastewater collection device (1) comprises a wastewater collection tank, and the waste liquid inlet pipe is arranged on one side of the wastewater collection tank.

6. A zero-emission device for low-temperature evaporation treatment of ammonia nitrogen wastewater according to claim 1, characterized in that: The low-temperature evaporation device (3) comprises a low-temperature evaporator.

7. The zero-discharge device for low-temperature evaporation treatment of ammonia nitrogen wastewater according to claim 1 is characterized in that: The drainage equipment (5) comprises a drainage tank.

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