Alkaline phosphorus removal agent constant liquid level gravity adding device and adding process

Abstract

The invention discloses an alkaline phosphorus removal agent constant liquid level gravity adding device, and belongs to the technical field of sewage treatment. The alkaline phosphorus removal agent constant liquid level gravity adding device comprises a backflow pipe, an agent storage pool and a self-priming centrifugal pump. One side of the agent storage pool is connected with the self-priming centrifugal pump through a pipeline, a liquid outlet of the self-priming centrifugal pump is connected with a main pipe, and an adding pipe is arranged at the position, close to the lower end, of the main pipe. According to the invention, continuous operation can be realized, so that the situation that adding equipment stops running and aluminum hydroxide crystallization equipment is damaged when no agent needs to be added in the production process can be avoided; the height of a reflux point is fixed, so that constant static pressure and constant flow in the agent gravity adding process are ensured; all valves are PVC diaphragm valves, so that the addition amount is easy to accurately regulate and control, and valve damage caused by agent crystallization is avoided; and a circulating pipe is nested on the outer surfaces of the backflow pipe and the main pipe, and circulating liquid medicine is cooled through a circulating liquid cooling technology, so that heat generated by long-time circulation of the liquid medicine and further chemical reaction are avoided, and the quality of the liquid medicine is improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an alkaline phosphorus removal agent constant liquid level gravity dosing device and a dosing process thereof. Background technique [0002] Among the various water treatment agents used in the sewage treatment industry, aluminum hydroxide phosphorus removal agent is a water treatment agent with obvious crystallization properties. In the past, the dosing of water treatment chemicals was basically done by diaphragm metering pumps. Because the aluminum hydroxide phosphorus removal agent is easy to crystallize, the one-way check device of the diaphragm pump fails, especially in the process system that does not require chemical dosing. When the pump is stopped, this phenomenon is more obvious, and it may even cause the entire dosing pipeline system to be scrapped. It can be said that the diaphragm metering pump cannot be used when the aluminum hydroxide phosphoru...

AI Technical Summary

Problems solved by technology

In the past, the dosing of water treatment chemicals was basically done by diaphragm metering pumps. Because the aluminum hydroxide phosphorus removal agent is easy to crystallize, the one-way check device of the diaphragm pump fails, especially in the process system that does not require chemical dosing. When the pump is stopped, this phenomenon is more obvious, and it may even cause the entire dosing pipeline system to be scrapped. It can be said that the diaphragm metering pump cannot be used at all when the aluminum hydroxide dephosphorization agent is added.

The traditional gravity dosing method is only suitable for micro-small sewage treatment plants, because medium and large sewage treatment plants must have sufficient chemical reserves, and it is impossible to build a large chemical storage tank above the coagulation tank, so the traditional gravity The dosing method is also not suitable for medium and large sewage treatment plants

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