Waste gas treatment multi-condensation device

Abstract

The utility model belongs to the field of waste gas treatment, and particularly relates to a waste gas treatment multi-condensation device which comprises a demisting tank, a condensation tank and a demisting box, a gas inlet and a first liquid outlet are respectively formed in the upper end and the lower end of the demisting tank, a cooling pipe is fixedly connected to the middle in the demisting tank, and a water inlet and a water outlet are respectively formed in the upper end and the lower end of the cooling pipe. A spiral blade is fixedly connected between the outer wall of the cooling pipe and the inner wall of the demisting tank, a plurality of filter screens are arranged on the spiral blade at intervals, the lower portion of the demisting tank is connected with a confluence three-way valve through a connecting pipe, the other two branches of the confluence three-way valve are communicated with a condensation tank and a three-way connector, and a spiral condensation pipe is fixedly connected into the condensation tank. The outer side of the condensation tank is communicated with a demisting box through a connecting pipe, the other side of the demisting box is communicated with a three-way connector through a connecting pipe, another branch of the three-way connector is communicated with an air outlet, and the air outlet is fixedly connected with a pressure regulating valve. According to the device, the condensation demisting effect is improved, and the problem that the condensation demisting effect cannot meet the treatment requirement in the existing waste gas treatment process is solved.

Description

Technical Field

[0001] The utility model belongs to the field of waste gas treatment, in particular to a waste gas treatment multiple condensation device. Background Art

[0002] Anthraquinone is an organic compound and a synthetic natural dye. The main process waste gases generated during its production are organic waste gases and acidic waste gases, namely anthraquinone and trace amounts of phthalic anhydride. In the process of treating the process waste gases, it is usually first sprayed with alkali, then subjected to gas-liquid separation through condensation demisting, and finally the residual gas is absorbed by the adsorption effect of activated carbon. In this process, if the condensation demisting effect fails to meet the requirements, it is easy for the activated carbon to reach adsorption saturation too quickly, thereby failing to achieve the expected effect of activated carbon on waste gas absorption. If the treatment is not timely, the waste gas emissions will exceed the standard. Therefore, it is necessary to develop a waste gas treatment device that can improve the condensation demisting effect. Utility Model Content

[0003] In view of the above technical problems, the utility model provides a multiple condensation device for waste gas treatment to solve the problem that the condensation and demisting effect of the existing waste gas treatment process does not meet the treatment requirements.

[0004] The demister is a device for treating waste gas by multiple condensations, the demister being provided with an air inlet at the upper end of the demister and a first liquid outlet at the lower end of the demister, a cooling pipe being fixedly connected in the middle of the demister, a water inlet and a water outlet being respectively provided at the upper and lower ends of the cooling pipe, a spiral blade being fixedly connected between the outer wall of the cooling pipe and the inner wall of the demister, a plurality of filters being arranged at intervals on the spiral blades, the lower portion of the demister is connected to a converging three-way valve through a connecting pipe, the other two branches of the converging three-way valve are respectively connected to the condenser and a three-way joint through connecting pipes, a spiral condenser is fixedly connected in the condenser, the outer side of the condenser is communicated with the demister box through the connecting pipe, the other side of the demister box is communicated with the three-way joint through a connecting pipe, the other branch of the three-way joint is connected with an air outlet, and the air outlet is fixedly connected to a pressure regulating valve.

[0005] Furthermore, a rectangular notch is left at the lower end of the outer side of the filter.

[0006] Furthermore, a condensation air inlet and a condensation air outlet are respectively provided on the upper and lower parts of one side of the condensation tank, and the condensation air inlet and the condensation air outlet are both fixedly connected with valves.

[0007] Furthermore, a baffle is fixedly connected to the upper middle portion of the demister box, and a second liquid outlet is provided at the lower portion of one side of the demister box.

[0008] Compared with the prior art, the present invention has the following advantages:

[0009] The utility model utilizes spiral blades arranged in the demister to reduce the speed at which the gas-liquid mixture obtained after alkali washing flows through the demister. By arranging filters at equal intervals on the spiral blades, the purpose of condensation demisting can be achieved when the gas-liquid mixture passes through the filters. Multiple filters are used in combination, and at the same time, a cooling pipe filled with cooling water is used to reduce the temperature in the demister, thereby improving the effect of condensation demisting. By using a spiral condenser in the condenser, the gas-liquid mixture is further cooled, further increasing the precipitation of liquid. In combination with the use of a demister, the effect of condensation demisting is further improved. Finally, a pressure regulating valve arranged at the air outlet controls whether condensation demisting is performed again. If the outflowing gas flow rate is still large at this time, the gas flows back to the condenser through the connecting pipe through the converging three-way valve and undergoes condensation demisting again, ensuring that the condensation demisting process can meet the expected requirements. The converging three-way valve can be used to control the flow direction of the gas-liquid mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic structural diagram of the utility model.

[0011] Figure 2 This is the front view of the filter screen of the present invention.

[0012] Figure 3 This is a top view of the demister box of the utility model.

[0013] In the figure: 1. Demisting tank, 11. Air inlet, 12. Water inlet, 13. Cooling pipe, 14. Spiral blade, 15. Filter, 16. First liquid outlet, 17. Bracket, 18. Water outlet, 2. Condensation tank, 21. Condensation air inlet, 22. Condensation air outlet, 23. Spiral condenser, 24. Valve, 3. Connecting pipe, 4. Converging three-way valve, 5. Pressure regulating valve, 6. Demisting box, 61. Baffle, 62. Second liquid outlet, 7. Three-way connector, 8. Air outlet. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] like Figure 1 、 23 shows a multiple condensation device for treating waste gas, comprising a demister 1, a condenser 2, and a demister box 6. An air inlet 11 is provided at the upper end of the demister 1, a first liquid outlet 16 is provided at the lower end of the demister 1, a cooling pipe 13 is fixedly connected to the middle part of the demister 1, and a water inlet 12 and a water outlet 18 are provided at the upper and lower ends of the cooling pipe 13, respectively. In order to reduce the speed at which the gas-liquid mixture flows through the demister, a spiral blade 14 is fixedly connected between the outer wall of the cooling pipe 13 and the inner wall of the demister 1. In order to improve the demisting ability, a number of filters 15 are arranged at intervals on the spiral blade 14. In order to control the internal structure of the device As for the flow direction of the gas-liquid mixture, the lower part of the demister tank 1 is connected to the converging three-way valve 4 through the connecting pipe 3, and the other two branches of the converging three-way valve 4 are respectively connected to the condenser tank 2 and the three-way joint 7 through the connecting pipe 3. In order to ensure the condensation effect, a spiral condenser tube 23 is fixedly connected to the condenser tank 2. In order to further achieve the condensation and demisting effect, the outer side of the condenser tank 2 is connected to the demister box 6 through the connecting pipe 3, and the other side of the demister box 6 is connected to the three-way joint 7 through the connecting pipe 3. The other branch of the three-way joint 7 is connected to the air outlet 8. In order to ensure that the treated gas achieves the expected effect, a pressure regulating valve 5 is fixedly connected to the air outlet 8.

[0016] In order to ensure that the liquid separated in the demister can flow down smoothly, a rectangular notch is left at the lower end of the outer side of the filter screen 15 .

[0017] In order to achieve reliable control of the condensed gas, a condensation air inlet 21 and a condensation air outlet 22 are respectively opened on the upper and lower parts of one side of the condensation tank 2, and valves 24 are fixedly connected to the condensation air inlet 21 and the condensation air outlet 22.

[0018] In order to ensure the gas-liquid separation effect in the demister box, a baffle 61 is fixedly connected to the upper part of the demister box 6 , and a second liquid outlet 62 is opened at the lower part of one side of the demister box 6 .

[0019] It should be noted that, in this embodiment, the pressure regulating valve is an existing device, so it will not be described in detail in the specification.

[0020] The specific working process of this utility model is as follows:

[0021] During the waste gas treatment and condensation process, first check the device to ensure that there is no residual cooling water in the cooling pipe 13 in the demister 1 and no residual cooling gas in the condenser 2. After checking, introduce cooling water into the cooling pipe 13 through the water inlet 12 opened on the demister 1, open the valve 24 on the air inlet 21 of the condenser, and introduce condensed gas. At this time, the waste gas to be treated is introduced through the air inlet 11 opened on the demister 1, and the waste gas flows along the path formed by the spiral blade 14. When passing through the filter 15, the gas continues to flow through the mesh of the filter 15 until it flows into the condenser 2 through the connecting pipe 3 and the converging three-way valve 4. The liquid is blocked by the unopened part of the filter 15 and falls onto the spiral blade 14. It flows into the bottom of the demister 1 along the spiral blade 14 through the gap reserved at the lower end of the filter 15 and flows out through the first liquid outlet 16. The exhaust gas flowing into the condensation tank 2 flows into the demister box 6 along the connecting pipe after condensation. The liquid hits the baffle 61 and falls into the lower part of the demister box 6 and flows out through the second liquid outlet 62. The gas flows out along the gap between the baffle 61 and flows to the pressure regulating valve 5 through the connecting pipe 3. If the exhaust gas flow is still large at this time, most of it will flow along the connecting pipe 3 through the converging three-way valve 4 and then flow back to the condensation tank 2, and a small part will flow out to the next work section. If the gas flow is small at this time, it will completely flow into the next work section through the pressure regulating valve 5.

Claims

1. A multiple condensation device for treating waste gas, comprising a demisting tank (1), a condensing tank (2), and a demisting box (6), characterized in that: The upper end of the demisting tank (1) is provided with an air inlet (11), the lower end of the demisting tank (1) is provided with a first liquid outlet (16), the middle part of the demisting tank (1) is fixedly connected with a cooling pipe (13), the upper end and the lower end of the cooling pipe (13) are respectively provided with a water inlet (12) and a water outlet (18), a spiral blade (14) is fixedly connected between the outer wall of the cooling pipe (13) and the inner wall of the demisting tank (1), a plurality of filter screens (15) are arranged at intervals on the spiral blade (14), and the lower part of the demisting tank (1) is connected to the combined air filter (15) through a connecting pipe (3). The condenser (2) is connected to the three-way valve (4); the other two branches of the converging three-way valve (4) are respectively connected to the condenser (2) and the three-way joint (7) through the connecting pipe (3); the spiral condenser (23) is fixedly connected inside the condenser (2); the outside of the condenser (2) is connected to the demisting box (6) through the connecting pipe (3); the other side of the demisting box (6) is connected to the three-way joint (7) through the connecting pipe (3); the other branch of the three-way joint (7) is connected to the air outlet (8), and the air outlet (8) is fixedly connected to the pressure regulating valve (5).

2. The exhaust gas treatment multiple condensation device according to claim 1, characterized in that: A rectangular notch is left at the lower end of the outer side of the filter screen (15).

3. The exhaust gas treatment multiple condensation device according to claim 1, characterized in that: A condensation air inlet (21) and a condensation air outlet (22) are respectively provided at the upper and lower parts of one side of the condensation tank (2), and the condensation air inlet (21) and the condensation air outlet (22) are both fixedly connected with a valve (24).

4. The exhaust gas treatment multiple condensation device according to claim 1, characterized in that: A baffle (61) is fixedly connected to the upper middle portion of the demisting box (6), and a second liquid outlet (62) is provided at the lower portion of one side of the demisting box (6).

Images