Volatile organic compounds (VOCS) gas washing device for semi-dry sludge drying

Abstract

The utility model belongs to the technical field of sludge drying, and relates to a half-dry VOCS (Volatile Organic Compounds) gas washing device for sludge drying. Comprising a cooler, a disinfection layer and an absorption layer which are arranged from top to bottom and located in the same container, the container is connected with a cleaning water outlet, a cleaning water inlet, an air inlet and a water outlet, the cleaning water outlet is located above the cooler, the cleaning water inlet and the water outlet are both located at the bottom of the container, and a water pump is connected between the cleaning water outlet and the cleaning water inlet. The gas inlet is located between the absorption layer and the water outlet, and the absorption layer comprises biological filler used for absorbing VOCS in gas. The absorption layer below is infiltrated by water condensed by the cooling layer, the absorption layer is filled with special biological stuffing to absorb VOCS in gas, and the cleaning water outlet, the cleaning water inlet, the water pump and the disinfection layer are opened regularly to prevent excessive biological florae from blocking the absorption layer. The VOCS concentration in the gas can be effectively reduced, the equipment cost is low, and the maintenance frequency is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of sludge drying and relates to a VOCS gas washing device for semi-dry sludge drying. Background Art

[0002] At present, VOCS waste gas after sludge drying is usually treated by water washing or biological filter. The water washing effect is not good and it is difficult to meet the emission standards. The biological filter occupies a large area and the investment cost is too high. Utility Model Content

[0003] The purpose of the utility model is to solve the problems existing in the prior art and provide a VOCS scrubbing device for semi-dry sludge drying.

[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a semi-dry VOCS gas washing device for sludge drying, characterized in that it includes a cooler, a disinfection layer, and an absorption layer arranged from top to bottom, the three are located in the same container, the container is connected with a cleaning water outlet, a cleaning water inlet, an air inlet, and a drain outlet, the cleaning water outlet is located above the cooler, the cleaning water inlet and the drain outlet are both located at the bottom of the container, a water pump is connected between the cleaning water outlet and the cleaning water inlet, the air inlet is located between the absorption layer and the drain outlet, and the absorption layer includes a biological filler for absorbing VOCS in the gas.

[0005] The cooler is a water-cooled heat exchanger, and the inlet water temperature is lower than 30°C.

[0006] The disinfection layer is an array of ultraviolet disinfection lamps, and the array is arranged in a 100mm*100mm square matrix.

[0007] The biological filler comprises a spherical PVC biological filler shell with a diameter of 100 mm and a thickness of 2 mm. The outer surface of the shell is evenly covered with through holes with a diameter of 5 mm, and the inner surface is filled with sawdust. The sawdust filling amount is 80 grams in each shell, and the sawdust is loosely filled in a wooly shape.

[0008] The cleaning water outlet, cleaning water inlet, water pump and disinfection layer are opened regularly, and the power of the water pump is 5.5KW.

[0009] The utility model mainly uses a biological filler layer to treat gas VOCS. The filler layer made according to the preparation method can effectively increase the contact area between the gas and the absorption layer, and the wind pressure loss per 100mm material layer does not exceed 300pa. It can be used for the transformation of various existing projects or new projects. The utility model has excellent space cost for sludge drying tail gas with large air volume and low concentration. Compared with the biological filter, the system occupies an average area of ​​6 square meters per 20,000 cubic meters per hour, saving more than 70% of the area. The utility model is a tower gas scrubber, and the ultraviolet lamp is used to control the number of biological colonies rather than participate in the decomposition of VOCS. It is only used intermittently or as an auxiliary treatment method when the gas concentration is too high. Therefore, compared with traditional photolysis equipment, this part has the advantages of low lamp replacement frequency and low power consumption. The use of the utility model can effectively reduce the concentration of VOCS in the gas, and the equipment cost is low and the maintenance frequency is low. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] Figure 2 It is a schematic diagram of the structure of the biological filler of the utility model.

[0012] In the figure: cleaning water outlet 1, cleaning water inlet 2, water pump 3, cooler 4, disinfection layer 5, absorption layer 6, air inlet 7, drain outlet 8, biological filler shell 9, through hole 10, wood chips 11. DETAILED DESCRIPTION

[0013] The utility model is described in detail below in conjunction with the accompanying drawings. Example

[0014] like Figure 1 As shown, a VOCS scrubbing device for semi-dry sludge drying comprises a cooler 4, a disinfection layer 5, and an absorption layer 6 arranged from top to bottom, the three being located in the same container, the container being connected with a cleaning water outlet 1, a cleaning water inlet 2, an air inlet 7, and a drain 8, the cleaning water outlet 1 being located above the cooler 4, the cleaning water inlet 2 and the drain 8 being both located at the bottom of the container, a water pump 3 being connected between the cleaning water outlet 1 and the cleaning water inlet 2, the air inlet 7 being located between the absorption layer 6 and the drain 8, and the absorption layer 6 comprising a biological filler for absorbing VOCS in the gas.

[0015] The cooler 4 is a water-cooled heat exchanger, and the inlet water temperature is lower than 30°C.

[0016] The disinfection layer 5 is an array of ultraviolet disinfection lamps, and the array is arranged in a 100mm*100mm square matrix.

[0017] like Figure 2As shown, the biofiller comprises a spherical PVC biofiller shell 9 with a diameter of 100 mm and a thickness of 2 mm, the outer surface of the shell is evenly covered with through holes 10 with a diameter of 5 mm, and the inside is filled with sawdust 11. The sawdust filling amount is 80 grams per shell, in a fluffy, loose filling.

[0018] The utility model utilizes the condensed water of the cooling layer 4 to infiltrate the lower absorption layer 6 to absorb VOCS in the gas; the cleaning water outlet 1, the cleaning water inlet 2, the water pump 3, and the disinfection layer 5 are opened for 30 minutes every week to prevent excessive biological flora from clogging the absorption layer 6, and the power of the water pump 3 is 5.5kw.

Claims

1. A VOCS scrubber for semi-dry sludge drying, characterized by: The invention comprises a cooler (4), a disinfection layer (5), and an absorption layer (6) which are arranged from top to bottom. The three layers are located in the same container. The container is connected to a cleaning water outlet (1), a cleaning water inlet (2), an air inlet (7), and a drain (8). The cleaning water outlet (1) is located above the cooler (4). The cleaning water inlet (2) and the drain (8) are both located at the bottom of the container. A water pump (3) is connected between the cleaning water outlet (1) and the cleaning water inlet (2). The air inlet (7) is located between the absorption layer (6) and the drain (8). The absorption layer (6) comprises a biological filler for absorbing VOCS in the gas.

2. The VOCS scrubber for semi-dry sludge drying according to claim 1, characterized in that: The cooler (4) is a water-cooled heat exchanger, and the inlet water temperature is lower than 30°C.

3. The VOCS scrubber for semi-dry sludge drying according to claim 1, characterized in that: The disinfection layer (5) is an array of ultraviolet disinfection lamps, and the array is arranged in a 100 mm*100 mm square matrix.

4. The VOCS scrubber for semi-dry sludge drying according to claim 1, characterized in that: The biological filler comprises a spherical PVC biological filler shell with a diameter of 100 mm and a thickness of 2 mm. The outer surface of the shell is evenly covered with through holes with a diameter of 5 mm, and the inner surface is filled with sawdust. The sawdust filling amount is 80 grams in each shell, and the sawdust is loosely filled in a wooly shape.

5. A VOCS scrubber for semi-dry sludge drying according to any one of claims 1 to 4, characterized in that: The cleaning water outlet (1), the cleaning water inlet (2), the water pump (3), and the disinfection layer (5) are opened regularly, and the power of the water pump (3) is 5.5 kW.

Images