Inclined plate sedimentation tank utilizing pneumatic conveying

Abstract

A sloping plate sedimentation tank utilizing pneumatic conveying comprises a spiral conveyor (8), the spiral conveyor (8) is installed in the sloping plate sedimentation tank (9), the lower portion of the sloping plate sedimentation tank (9) is connected with a sludge discharge pipe (5), and the sludge discharge pipe (5) is sequentially provided with a sludge discharge pipe electric valve (6) and a sludge discharge pipe manual valve (7). The device is characterized in that an air delivery pipe (2) is communicated with the sludge discharge pipe (5) between the sludge outlet end of the spiral conveyor (8) and the sludge discharge pipe electric valve (6), the air inlet end of the air delivery pipe (2) is communicated with the air source (1), and the air outlet end of the air delivery pipe (2) is communicated with the sludge discharge pipe (5). According to the utility model, the equipment operation cost is reduced, and electricity charge is not required. Pollutants in the pipeline are conveyed thoroughly, the pipeline cannot be blocked, and normal operation of equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to a sewage treatment device, in particular to an inclined plate sedimentation tank, specifically an inclined plate sedimentation tank using pneumatic conveying. Background Art

[0002] At present, the sewage discharged from the production activities of steel rolling, steelmaking, and continuous casting in iron and steel metallurgical enterprises contains a large amount of oil, scale, sediment, suspended matter, etc. These impurities need to be decomposed, reacted, precipitated, and filtered by adding chemicals. Among the sewage treatment series equipment, only the inclined plate sedimentation tank can achieve this effect. Working principle: When the raw water enters the pipeline, there is a chemical dosing port above the pipeline. The raw water enters the branch trough and flows into the equipment body. There is a baffle at the water inlet to prevent the raw water from directly flowing into the water collection area. Using the principle of water balance, the raw water enters the reaction area. At this time, due to the reaction of PAC chemical and PAM chemical in the raw water, some pollutants generate larger flocs. The water flow enters the inclined plate packing area, and the sludge sinks along the inclined plate, making the floc particles large and dense, so that the flocs are well precipitated. The clear water flows out of the inclined plate packing area to the water collection area and enters the water outlet. After the flocs are precipitated, they are conveyed by a screw conveyor and discharged from the equipment body to enter the subsequent process. When the screw conveyor conveys the sludge, due to the various components contained in the pollutants, the pollutants will adhere to the inner wall of the conveying pipeline, and it is easy to cause caking and blockage of the pipeline during long-term operation, which is not conducive to the normal operation of the equipment. Content of the Utility Model

[0003] The purpose of the utility model is to design an inclined plate sedimentation tank using pneumatic conveying in view of the problem that the sewage outlet of the existing inclined plate sedimentation tank is prone to blockage.

[0004] The technical solution of the utility model is as follows:

[0005] An inclined plate sedimentation tank using pneumatic conveying, including a screw conveyor 8 installed in the inclined plate sedimentation tank 9. A sludge discharge pipe 5 is connected to the lower part of the inclined plate sedimentation tank 9. A sludge discharge pipe electric valve 6 and a sludge discharge pipe manual valve 7 are sequentially installed on the sludge discharge pipe 5. The feature is that an air conveying pipe 2 is communicated with the sludge discharge pipe 5 between the sludge outlet end of the screw conveyor 8 and the sludge discharge pipe electric valve 6. The air inlet end of the air conveying pipe 2 is communicated with a gas source 1, and the air outlet end is communicated with the sludge discharge pipe 5.

[0006] An air conveying pipe manual valve 3 and an air conveying pipe electric valve 4 are sequentially installed on the air conveying pipe 2, and the air conveying pipe manual valve 3 is closer to the gas source side.

[0007] Advantages of the Utility Model

[0008] 1. The operation cost of the equipment is reduced, and there is no need to bear the electricity cost.

[0009] The pollutants in the pipeline are transported thoroughly, and the pipeline will not be blocked, ensuring the normal operation of the equipment.

[0010] The service life of the equipment is extended.

[0011] The working environment is clean. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the present utility model.

[0013] In the figure: 1 is the air source; 2 is the air delivery pipe; 3 is the manual valve of the air delivery pipe; 4 is the electric valve of the air delivery pipe; 5 is the sludge discharge pipe; 6 is the electric valve of the sludge discharge pipe; 7 is the manual valve of the sludge discharge pipe; 8 is the screw conveyor. Detailed Embodiment

[0014] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0015] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like cited in this specification are only for the convenience of clear narration and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present utility model can be implemented.

[0016] As Figure 1 shown.

[0017] An inclined plate sedimentation tank using pneumatic conveying includes a screw conveyor 8. The screw conveyor 8 is installed in the inclined plate sedimentation tank 9 (the same as the existing structure). The lower part of the inclined plate sedimentation tank 9 is connected with a sludge discharge pipe 5. As Figure 1 , a sludge discharge pipe electric valve 6 and a sludge discharge pipe manual valve 7 are successively installed on the sludge discharge pipe 5. A gas delivery pipe 2 is communicated with the sludge discharge pipe 5 between the sludge outlet end of the screw conveyor 8 and the sludge discharge pipe electric valve 6. The air inlet end of the gas delivery pipe 2 is communicated with the air source 1, and the air outlet end is communicated with the sludge discharge pipe 5. A gas delivery pipe manual valve 3 and a gas delivery pipe electric valve 4 are successively installed on the gas delivery pipe 2, and the gas delivery pipe manual valve 3 is closer to the air source side.

[0018] The working principle of the present utility model is:

[0019] The present utility model hopes to change the phenomenon of pollutant blockage in the conveying pipeline. For this purpose, the redundant gas source in the iron and steel metallurgy enterprise is utilized to open a hole on the opposite side of the conveying pipeline outlet in the middle of the screw conveyor, and the pollutants are conveyed by gas. In this way, the conveyed pollutants are more thorough. In addition, since the pollutants still need to be pressed and dewatered, a lifting pump is required to pump the pollutants into the plate and frame filter press for pressing and dewatering. The pollutants generated by a lamella clarifier device with a processing capacity of 150 tons per hour are about 45 tons. For 45 tons of pollutants, a 12KW motor with a head of about 50m is required to work. The electricity cost generated by a single motor in a year is about 210,000 yuan. The amount of sewage generated by iron and steel metallurgy enterprises is generally large. The lamella clarifier devices are basically used in more than 5 units, and the electricity cost will be about 1 million yuan. When using gas transportation, the maximum head can be about 80m, and the pollutants are conveyed inside the pipeline, and the working environment is relatively clean. When changing to gas transportation of pollutants, it is necessary to calculate the amount of pollutants generated by each device and the diameter of the pipeline connecting the sludge discharge port. Before the flange connecting the sludge discharge port and the pipeline, a gas pipe orifice with a diameter of 50mm is opened, and the gas enters the pipeline through the gas pipe. Since the conveyed gas has pressure, it fills the entire pipeline after entering the pipeline, and the pollution is conveyed without gaps by 100%, making the sludge discharge thorough and reducing the corrosion of the pipeline by pollutants.

[0020] The advantages of using the gas source to transport pollutants are as follows:

[0021] 1. The operating cost of the equipment is reduced, and there is no need to bear the electricity cost.

[0022] The pollutants in the pipeline are conveyed thoroughly, and the pipeline will not be blocked, ensuring the normal operation of the equipment.

[0023] The service life of the equipment is extended.

[0024] The working environment is clean.

[0025] The above embodiments are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and equivalent replacements can be made. These technical solutions obtained by improving and equivalently replacing the claims of the present utility model all fall within the protection scope of the present utility model.

[0026] The parts not involved in the present utility model are the same as the prior art or can be implemented by using the prior art.

Claims

1. An inclined plate sedimentation tank using pneumatic conveying, comprising a screw conveyor (8), the screw conveyor (8) being installed in an inclined plate sedimentation tank (9), the lower part of the inclined plate sedimentation tank (9) being connected to a mud discharge pipe (5), the mud discharge pipe (5) being sequentially installed with a mud discharge pipe electric valve (6) and a mud discharge pipe manual valve (7), wherein: An air supply pipe (2) is connected to the mud discharge pipe (5) between the mud outlet end of the screw conveyor (8) and the mud discharge pipe electric valve (6); the air inlet end of the air supply pipe (2) is connected to the air source (1), and the air outlet end is connected to the mud discharge pipe (5).

2. The inclined plate sedimentation tank using pneumatic conveying according to claim 1 is characterized in that: The gas pipeline (2) is provided with a gas pipeline manual valve (3) and a gas pipeline electric valve (4) in sequence, and the gas pipeline manual valve (3) is closer to the gas source side.

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