Wastewater treatment system for activated carbon production

Abstract

The utility model relates to the technical field of activated carbon production, in particular to a wastewater treatment system for activated carbon production, which comprises a rinsing tank, a phosphoric acid recovery tank, a pH regulating tank, an alkali liquor storage tank, a sedimentation tank, a precipitate recovery tank and a deep dephosphorization tank, the rinsing tank, the pH adjusting tank and the sedimentation tank are connected in sequence; the phosphoric acid recovery pool is connected with the rinsing pool; the alkali liquor storage tank is connected with the pH adjusting tank; the sedimentation tank is respectively connected with the sediment recovery tank and the deep dephosphorization tank. According to the wastewater treatment system for activated carbon production, provided by the utility model, the wastewater treatment cost is reduced while the recycling rate of activated carbon rinsing wastewater is increased, and the wastewater treatment system conforms to the green and environment-friendly recyclable development concept.

Description

Technical Field

[0001] The utility model relates to the technical field of activated carbon production, in particular to a wastewater treatment system for activated carbon production. Background Art

[0002] In the phosphoric acid activated carbon production process, the activated carbon needs to be rinsed, aired, and other treatments before it can be ground and other operations can be continued. Rinsing the activated carbon will produce a large amount of wastewater, which contains phosphoric acid, tar, and other substances produced by activators. Therefore, the wastewater needs to be treated before it can be discharged or reused. The wastewater treatment system is a Chinese utility model patent with application number CN201310033083.X and the name is a process and system for the reuse of wastewater from the production of wood activated carbon. The traditional wastewater treatment system has a low reuse rate for phosphoric acid wastewater. In order to meet the discharge requirements, a certain amount of additional economic costs are required, which does not conform to the green and environmentally friendly concept of recyclable development. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a wastewater treatment system for activated carbon production to improve the reuse rate of activated carbon rinsing wastewater.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a wastewater treatment system for activated carbon production, including a rinsing tank, a phosphoric acid recovery tank, a pH adjustment tank, an alkali solution storage tank, a sedimentation tank, a sediment recovery tank and a deep dephosphorization tank;

[0005] The rinsing tank, pH adjustment tank and sedimentation tank are connected in sequence;

[0006] The phosphoric acid recovery tank is connected to the rinsing tank;

[0007] The alkali solution storage tank is connected to the pH adjustment tank;

[0008] The sedimentation tank is connected to the sediment recovery tank and the deep dephosphorization tank respectively.

[0009] Furthermore, the rinsing tank is provided with a sediment discharge port, a phosphoric acid recovery port and a residual liquid discharge port, the phosphoric acid recovery port is connected to the phosphoric acid recovery tank, and the residual liquid discharge port is connected to the pH adjustment tank.

[0010] Furthermore, the drain outlet of the deep dephosphorization tank is connected to the alkali solution storage tank.

[0011] Furthermore, lime water is stored in the alkali solution storage tank.

[0012] Furthermore, a resin adsorption net is provided in the deep dephosphorization tank.

[0013] Furthermore, liquid level sensors are provided in the rinsing tank and the pH adjustment tank.

[0014] Furthermore, a pH tester is provided in the pH adjustment tank.

[0015] The beneficial effects of the utility model are: providing a wastewater treatment system for activated carbon production, wherein the rinsing tank is used to remove phosphoric acid, tar and other substances produced by activators in the activated carbon, and the acid solution with a higher concentration after rinsing is transported to the phosphoric acid recovery tank to be used as an activator in the activated carbon production, while the acid solution with a lower concentration is transported to the pH adjustment tank, and the alkali solution is transported to the pH adjustment tank using the alkali solution storage tank to adjust the pH value of the solution in the pH adjustment tank to above 7 to complete neutralization, and then the neutralized solution is transported to the sedimentation tank for sedimentation separation, and the separated liquid is transported to the deep dephosphorization tank for deep purification, so that the effluent meets the national emission standards for discharge or reuse, and the sediment is transported to the sedimentation recovery tank for collection and reuse. The wastewater treatment system for activated carbon production provided by the utility model reduces the wastewater treatment cost while improving the reuse rate of activated carbon rinsing wastewater, and conforms to the green and environmentally friendly concept of recyclable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the wastewater treatment system for activated carbon production;

[0017] Figure 2 Another schematic diagram of the structure of the wastewater treatment system for activated carbon production;

[0018] Description of labels:

[0019] 1. Rinsing tank; 2. Phosphoric acid recovery tank; 3. pH adjustment tank; 4. Alkali solution storage tank; 5. Sedimentation tank; 6. Sedimentation recovery tank; 7. Deep dephosphorization tank. DETAILED DESCRIPTION

[0020] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0021] The utility model provides a wastewater treatment system for activated carbon production, which is applied in the phosphoric acid activated carbon production process.

[0022] Please refer to Figure 1 to Figure 2 As shown, the wastewater treatment system for activated carbon production of the utility model comprises a rinsing tank 1, a phosphoric acid recovery tank 2, a pH adjustment tank 3, an alkali solution storage tank 4, a sedimentation tank 5, a sediment recovery tank 6 and a deep dephosphorization tank 7;

[0023] The rinsing tank 1, the pH adjustment tank 3 and the sedimentation tank 5 are connected in sequence;

[0024] The phosphoric acid recovery tank 2 is connected to the rinsing tank 1;

[0025] The alkali solution storage tank 4 is connected to the pH adjustment tank 3;

[0026] The sedimentation tank 5 is connected to the sediment recovery tank 6 and the deep dephosphorization tank 7 respectively.

[0027] From the above description, it can be seen that the beneficial effects of the utility model are: providing a wastewater treatment system for activated carbon production, the rinsing tank 1 is used to remove phosphoric acid, tar and other substances produced by activators in the activated carbon, the acid solution with higher concentration after rinsing is transported to the phosphoric acid recovery tank 2, and used as an activator in the activated carbon production, and the acid solution with lower concentration is transported to the pH adjustment tank 3, and the alkali solution storage tank 4 is used to transport alkali solution to the pH adjustment tank 3 so as to adjust the pH value of the solution in the pH adjustment tank 3 to above 7 to complete neutralization, and then the neutralized solution is transported to the sedimentation tank 5 for sedimentation separation, and the separated liquid is transported to the deep dephosphorization tank 7 for deep purification, so that the effluent meets the national emission standards for discharge or reuse, and the sediment is transported to the sedimentation recovery tank 6 for collection and reuse.

[0028] Furthermore, the rinsing tank 1 is provided with a sediment discharge port, a phosphoric acid recovery port and a residual liquid discharge port, the phosphoric acid recovery port is connected to the phosphoric acid recovery tank 2, and the residual liquid discharge port is connected to the pH adjustment tank 3.

[0029] From the above description, it can be seen that the activated carbon is washed away with sediment in the rinsing tank 1 and discharged from the sediment outlet, the acid solution with higher concentration is transported to the phosphoric acid recovery tank 2 for reuse, and the acid solution with lower concentration is sent for neutralization.

[0030] Furthermore, the drain outlet of the deep dephosphorization tank 7 is connected to the alkali solution storage tank 4 .

[0031] From the above description, it can be known that the deep dephosphorization tank 7 transports the deeply purified water to the alkali solution storage tank 4 to prepare alkali water.

[0032] Furthermore, the alkali solution storage tank 4 contains lime water.

[0033] From the above description, it can be seen that lime water is used to neutralize the solution, thereby reducing the acidity of the acidic waste liquid, and the obtained calcium phosphate and other products are collected and recycled after precipitation in the sedimentation tank 5.

[0034] Furthermore, a resin adsorption net is provided in the deep dephosphorization tank 7 .

[0035] From the above description, it can be seen that the resin adsorption net is used to deeply adsorb other substances in the clean water so that the effluent meets the national emission standards for discharge or reuse.

[0036] Furthermore, liquid level sensors are provided in the rinsing tank 1 and the pH adjustment tank 3 .

[0037] Furthermore, a pH tester is provided in the pH adjustment tank 3 .

[0038] The working principle of the utility model is as follows: when in use, the rinsing tank 1 is used to remove phosphoric acid, tar and other substances produced by activators in the activated carbon. After rinsing, the acid solution with higher concentration is transported to the phosphoric acid recovery tank 2 and used as an activator in the production of activated carbon, while the acid solution with lower concentration is transported to the pH adjustment tank 3. The alkali solution storage tank 4 is used to transport alkali solution to the pH adjustment tank 3 so as to adjust the pH value of the solution in the pH adjustment tank 3 to above 7 to complete neutralization. Then, the neutralized solution is transported to the sedimentation tank 5 for sedimentation separation. The separated liquid is transported to the deep dephosphorization tank 7 for deep purification so that the effluent meets the national emission standards for discharge or reuse. The sediment is transported to the sedimentation recovery tank 6 for collection and reuse.

[0039] Please refer to Figure 1 to Figure 2 As shown, the first embodiment of the utility model is: an activated carbon production wastewater treatment system, including a rinsing tank 1, a phosphoric acid recovery tank 2, a pH adjustment tank 3, an alkali solution storage tank 4, a sedimentation tank 5, a sediment recovery tank 6 and a deep dephosphorization tank 7;

[0040] The rinsing tank 1, the pH adjustment tank 3 and the sedimentation tank 5 are connected in sequence;

[0041] The phosphoric acid recovery tank 2 is connected to the rinsing tank 1;

[0042] The alkali solution storage tank 4 is connected to the pH adjustment tank 3;

[0043] The sedimentation tank 5 is connected to the sediment recovery tank 6 and the deep dephosphorization tank 7 respectively.

[0044] The rinsing tank 1 is provided with a sediment outlet, a phosphoric acid recovery port and a residual liquid outlet, the phosphoric acid recovery port is connected to the phosphoric acid recovery tank 2, and the residual liquid outlet is connected to the pH adjustment tank 3. The drain outlet of the deep dephosphorization tank 7 is connected to the alkali solution storage tank 4. The alkali solution storage tank 4 contains lime water. The deep dephosphorization tank 7 is provided with a resin adsorption net. The rinsing tank 1 and the pH adjustment tank 3 are both provided with liquid level sensors. The pH adjustment tank 3 is provided with a pH tester.

[0045] In summary, the wastewater treatment system for activated carbon production provided by the utility model reduces the cost of wastewater treatment while increasing the reuse rate of activated carbon rinsing wastewater, which is in line with the green and environmentally friendly concept of recyclable development. The activated carbon is washed to remove sediment in the rinsing tank and discharged from the sediment outlet. The acid solution with higher concentration is transported to the phosphoric acid recovery tank for reuse, and the acid solution with lower concentration is sent for neutralization. The deep dephosphorization tank transports the deeply purified water to the alkaline solution storage tank to prepare alkaline water. Lime water is used to react with the solution to neutralize it, thereby reducing the acidity of the acidic waste liquid. The obtained calcium phosphate and other products are collected and recycled after precipitation in the sedimentation tank. The resin adsorption net is used to deeply adsorb other substances in the clean water so that the effluent meets the national emission standards for discharge or reuse.

[0046] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. Wastewater treatment system for activated carbon production, characterized in that: It comprises a rinsing tank, a phosphoric acid recovery tank, a pH regulating tank, an alkali solution storage tank, a sedimentation tank, a sediment recovery tank and a deep dephosphorization tank; the rinsing tank, the pH regulating tank and the sedimentation tank are connected in sequence; the phosphoric acid recovery tank is connected to the rinsing tank; the alkali solution storage tank is connected to the pH regulating tank; the sedimentation tank is respectively connected to the sediment recovery tank and the deep dephosphorization tank.

2. The activated carbon production wastewater treatment system according to claim 1, characterized in that: The rinsing tank is provided with a sediment discharge port, a phosphoric acid recovery port and a residual liquid discharge port. The phosphoric acid recovery port is connected to the phosphoric acid recovery tank, and the residual liquid discharge port is connected to the pH adjustment tank.

3. The activated carbon production wastewater treatment system according to claim 1, characterized in that: The drain outlet of the deep dephosphorization tank is connected to the alkali solution storage tank.

4. The activated carbon production wastewater treatment system according to claim 1, characterized in that: The alkali solution storage tank contains lime water.

5. The activated carbon production wastewater treatment system according to claim 1, characterized in that: A resin adsorption net is arranged in the deep dephosphorization pool.

6. The activated carbon production wastewater treatment system according to claim 1, characterized in that: Liquid level sensors are provided in the rinsing tank and the pH adjustment tank.

7. The activated carbon production wastewater treatment system according to claim 1, characterized in that: A pH tester is arranged in the pH regulating tank.

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