A coal chemical wastewater organic matter decomposition device

Abstract

The utility model discloses a coal chemical wastewater organic matter decomposition device, and the utility model relates to the technical field of organic matter decomposition equipment. The coal chemical wastewater organic matter decomposition device comprises an ozone generator, a mixing tank, a catalytic oxidation tower, a buffer tank, a fan and an activated carbon reaction tank; wherein the gas outlet end of the ozone generator is connected to the mixing tank, the output end of the mixing tank is connected to the input end of the catalytic oxidation tower, the catalytic oxidation tower is connected to the buffer tank and the activated carbon reaction tank, the output end of the buffer tank is connected to the fan, the output end of the fan is connected to the activated carbon reaction tank, and also comprises a booster pump, the booster pump is connected in series to the connecting pipe between the ozone generator and the mixing tank, and the utility model has the advantages of high organic matter decomposition efficiency, high ozone utilization rate, low operating cost, no secondary pollution, and stable effluent water quality.

Description

Technical Field

[0001] The utility model relates to the technical field of organic matter decomposition equipment, in particular to a coal chemical wastewater organic matter decomposition device. Background Art

[0002] China is short of oil and natural gas resources. Coal is China's main fossil energy source. This energy structure determines the development of a new type of coal chemical industry, namely the coal chemical industry led by coal gasification. It uses advanced chemical technologies such as catalytic synthesis, separation, and biochemical engineering to produce clean energy and various chemical products that can replace oil, thereby meeting the needs of future economic development and developing new coal chemical enterprises. Coal and water are two major resource elements. Coal chemical projects consume a huge amount of water. The rapid development of the coal chemical industry has caused an imbalance in regional water supply and demand. At the same time, China's coal resources and water resources are extremely unevenly distributed. Water-deficient areas are also facing the problem of limited surface water environmental capacity. A large amount of coal chemical wastewater is facing Due to the dilemma of having nowhere to discharge wastewater, coal chemical projects also generate a high amount of wastewater, which contains a large amount of organic pollutants. The large-scale construction of coal chemical projects will bring very serious social problems to areas rich in coal but short of water. Water resources and water environment issues have become the bottleneck restricting the development of the coal chemical industry. In order to promote the coordinated development of industrial economy, water resources and environment, the "National Environmental Protection "Eleventh Five-Year Plan" promulgated in 2007 clearly requires efforts to achieve less or zero wastewater discharge in key industries such as coal, which not only solves part of the water resource shortage problem, but also does not cause pollution and damage to the local environment and ecology. For the coal chemical projects under construction and planned, it has extremely important practical significance and far-reaching historical significance.

[0003] At present, the realization of the "zero emission" goal of coal chemical projects is limited by membrane concentration and evaporator technology. The organic pollutants in coal chemical wastewater form fouling in the membrane concentration, shortening the membrane life. Frequent cleaning causes the membrane concentration system to collapse and affects the salt resource products to fail to meet the standards. This is one of the main reasons that limit the use of membrane concentration and evaporator technology to achieve "zero emission" of coal chemical wastewater. Therefore, we proposed a coal chemical wastewater organic matter decomposition device to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a coal chemical wastewater organic matter decomposition device, which solves the problem that organic pollutants in the coal chemical wastewater form fouling during membrane concentration, shortening the membrane life, causing frequent cleaning to cause the membrane concentration system to collapse, and affecting the salt resource products to fail to meet the standards.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a coal chemical wastewater organic matter decomposition device, including an ozone generator, a mixing tank, a catalytic oxidation tower, a buffer tank, a fan and an activated carbon reaction tank;

[0006] The air outlet end of the ozone generator is conductively connected to the mixing tank, the output end of the mixing tank is conductively connected to the input end of the catalytic oxidation tower, the catalytic oxidation tower is conductively connected to the buffer tank and the activated carbon reaction tank, the output end of the buffer tank is conductively connected to the fan, and the output end of the fan is conductively connected to the activated carbon reaction tank.

[0007] Preferably, it further comprises a pressure pump, which is connected in series to the connecting pipe between the ozone generator and the mixing tank.

[0008] Preferably, a water distribution mechanism is provided at the bottom of the catalytic oxidation tower, and the water distribution mechanism comprises a support plate, and a plurality of strip holes are provided on the upper surface of the support plate.

[0009] Preferably, the support plate is made of SS2205 material.

[0010] Preferably, the outer diameter of the support plate is the same as the inner diameter of the catalytic oxidation tower.

[0011] Preferably, the air inlet end of the ozone generator is connected to an oxygen pipeline.

[0012] Preferably, a wastewater pipe is connected to the top of the mixing tank.

[0013] Beneficial Effects

[0014] The utility model provides a coal chemical wastewater organic matter decomposition device. Compared with the prior art, it has the following beneficial effects:

[0015] The coal chemical wastewater organic matter decomposition device effectively improves the solubility of ozone in water by mixing the ozone with wastewater in a mixing tank after pressurization, thereby improving the efficiency of the catalytic oxidation reaction in the catalytic oxidation tower, with high ozone utilization rate, high organic matter decomposition efficiency and stable effluent. In addition, the activated carbon reaction tank can improve the utilization rate of ozone, while reducing the ozone concentration in the wastewater, ensuring that the subsequent membrane system is not oxidized.

[0016] Then, the ozone that has not participated in the reaction and has not dissolved in the wastewater in the catalytic oxidation tower is collected by the negative pressure of the fan and sent to the activated carbon reaction tank, which improves the utilization rate of ozone and eliminates the need to set up an ozone tail gas destruction device for the ozone catalytic oxidation tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the process principle diagram of the utility model.

[0018] In the figure: 1. Ozone generator; 2. Pressure pump; 3. Mixing tank; 4. Catalytic oxidation tower; 5. Buffer tank; 6. Fan; 7. Activated carbon reaction tank. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 The utility model provides a technical solution: a coal chemical wastewater organic matter decomposition device, comprising an ozone generator 1, a mixing tank 3, a catalytic oxidation tower 4, a buffer tank 5, a fan 6 and an activated carbon reaction tank 7; wherein the air outlet end of the ozone generator 1 is conductively connected to the mixing tank 3, the output end of the mixing tank 3 is conductively connected to the input end of the catalytic oxidation tower 4, the catalytic oxidation tower 4 is conductively connected to the buffer tank 5 and the activated carbon reaction tank 7, the output end of the buffer tank 5 is conductively connected to the fan 6, the output end of the fan 6 is conductively connected to the activated carbon reaction tank 7, and also includes a booster pump 2, the booster pump 2 is serially connected to the connecting pipe between the ozone generator 1 and the mixing tank 3, the air inlet end of the ozone generator 1 is connected to an oxygen pipeline, the top of the mixing tank 3 is connected to a wastewater pipeline, and a water distribution mechanism is provided at the bottom of the catalytic oxidation tower 4, the water distribution mechanism includes a support plate, the upper surface of the support plate is provided with strip holes, and a plurality of strip holes are provided, the support plate is made of SS2205 material, and the outer diameter of the support plate is the same as the inner diameter of the catalytic oxidation tower 4;

[0021] First, an oxygen source enters an ozone generator 1 to generate ozone, which is pressurized to about 0.4 MPa by a pressure pump 2 and fully mixed with the organic wastewater from coal chemical industry in a mixing tank 3. Then, the gas-water mixture in the mixing tank 3 passes through a water distribution mechanism at the bottom of an ozone catalytic oxidation tower 4. Since the water distribution mechanism includes a support plate made of SS2205 material, and a plurality of strip holes are provided on the upper surface of the support plate, the gas-water mixture can evenly enter the catalyst packing layer of the catalytic tower to carry out an ozone catalytic oxidation reaction and effectively decompose organic matter in the water. Then, the wastewater treated by ozone catalytic oxidation flows into an activated carbon reaction tank 7 by gravity, and the organic matter in the wastewater is adsorbed on the surface of the activated carbon packing and enriched, creating an opportunity for the ozone dissolved in the wastewater to contact again, and a secondary organic matter oxidation and decomposition reaction is carried out. Then, the ozone in the ozone catalytic tower that has not reacted and has not dissolved in the wastewater is collected by a buffer tank 5 and a fan 6 under negative pressure and sent to the activated carbon reaction tank 7, where it contacts the organic matter adsorbed on the surface of the activated carbon packing, thereby improving the utilization rate of ozone and effectively treating the ozone tail gas.

[0022] During operation, firstly, an oxygen source is introduced into the ozone generator 1 to generate ozone, which is pressurized to about 0.4 MPa by the booster pump 2 and fully mixed with the organic wastewater from the coal chemical industry in the mixing tank 3. Then, the gas-water mixture in the mixing tank 3 passes through the water distribution mechanism at the bottom of the ozone catalytic oxidation tower 4. Since the water distribution mechanism includes a support plate made of SS2205 material, and a plurality of strip holes are provided on the upper surface of the support plate, the gas-water mixture can be uniformly introduced into the catalyst packing layer of the catalytic tower to carry out the ozone catalytic oxidation reaction and effectively decompose the organic matter in the water. Then, the wastewater treated by the ozone catalytic oxidation flows into the activated carbon reaction tank 7 by gravity. The organic matter in the wastewater is adsorbed on the surface of the activated carbon packing and enriched, creating an opportunity for the ozone dissolved in the wastewater to contact again, and a secondary organic matter oxidation and decomposition reaction is carried out. Then, the ozone in the ozone catalytic tower that has not reacted and has not dissolved in the wastewater is collected by the buffer tank 5 and the fan 6 under negative pressure and sent to the activated carbon reaction tank 7, where it contacts with the organic matter adsorbed on the surface of the activated carbon packing, thereby improving the utilization rate of ozone and effectively treating the ozone tail gas.

[0023] In summary, the device can not only effectively decompose organic pollutants in coal chemical wastewater, but also effectively reduce organic pollution in the membrane concentration section of the coal chemical zero emission project, and at the same time improve the quality of salt resource utilization in the evaporation and crystallization section.

[0024] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A coal chemical wastewater organic matter decomposition device, characterized by: It comprises an ozone generator (1), a mixing tank (3), a catalytic oxidation tower (4), a buffer tank (5), a fan (6) and an activated carbon reaction tank (7); The gas outlet end of the ozone generator (1) is conductively connected to the mixing tank (3), the output end of the mixing tank (3) is conductively connected to the input end of the catalytic oxidation tower (4), the catalytic oxidation tower (4) is conductively connected to the buffer tank (5) and the activated carbon reaction tank (7), the output end of the buffer tank (5) is conductively connected to the fan (6), and the output end of the fan (6) is conductively connected to the activated carbon reaction tank (7).

2. A coal chemical wastewater organic matter decomposition device according to claim 1, characterized in that: It also comprises a pressure pump (2), wherein the pressure pump (2) is connected in series to the connecting pipe between the ozone generator (1) and the mixing tank (3).

3. The device for decomposing organic matter in coal chemical wastewater according to claim 1, characterized in that: A water distribution mechanism is provided at the bottom of the catalytic oxidation tower (4), and the water distribution mechanism comprises a support plate, and a strip-shaped hole is provided on the upper surface of the support plate, and a plurality of strip-shaped holes are provided.

4. A coal chemical wastewater organic matter decomposition device according to claim 3, characterized in that: The support plate is made of SS2205 material.

5. The device for decomposing organic matter in coal chemical wastewater according to claim 3, characterized in that: The outer diameter of the support plate is the same as the inner diameter of the catalytic oxidation tower (4).

6. The device for decomposing organic matter in coal chemical wastewater according to claim 1, characterized in that: The air inlet end of the ozone generator (1) is connected to an oxygen pipeline.

7. The device for decomposing organic matter in coal chemical wastewater according to claim 1, characterized in that: The top of the mixing tank (3) is connected to a wastewater pipeline.

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