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System and method for automatically preparing flocculant solution

An automatic preparation and coagulant technology, which is applied in the general control system, control/regulation system, dissolution system, etc., can solve the problems of inability to take into account the coagulant preparation, consume manpower and material resources, and unfavorable power plant management, etc., and achieve good practical application value , Reduce labor intensity and save capital investment

Inactive Publication Date: 2016-09-28
大唐南京发电厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, whether it is a solid or liquid aluminum chloride coagulant, it needs to be manually operated on site during use, which consumes a lot of manpower and material resources, and the efficiency is low.
And when using artificial drug-dissolving coagulant, it is difficult to avoid the problem of dust and toxic gas endangering the health of operators
[0003] With the domestic large-scale ultra-supercritical units put into operation, the degree of automation is getting higher and higher, and there are fewer and fewer operators in the power plant. The chemical professional staff cannot take care of the preparation of drugs such as coagulants, and the increase in personnel will greatly increase the labor cost; Arrangement Non-professionals are engaged in drug dissolving work, which has potential safety hazards and is not conducive to the management of power plant work

Method used

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  • System and method for automatically preparing flocculant solution
  • System and method for automatically preparing flocculant solution
  • System and method for automatically preparing flocculant solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1: A system and method for automatically preparing coagulant solution

[0048] It includes a drug storage system, a drug dissolving system, a delivery system and a DCS control system. The DCS control system is electrically or pneumatically connected to the drug storage system, drug dissolving system and delivery system; the liquid outlet of the drug storage system is connected to the solution via the delivery system. The drug system is connected to the liquid inlet, and the drug dissolving system is also connected to the water source; the DCS control system electrical connection or gas connection is provided on the drug storage system liquid outlet, the drug dissolving system inlet and outlet, the drug dissolving system water inlet and the delivery system. Connected valves and manual valves. Manual valves and valves connected electrically or pneumatically to the DCS control system are connected in series.

[0049] Under normal operation, the manual valve is ...

example 1

[0065] There are two coagulant raw material liquid drug storage tanks, two coagulant delivery pumps, and three solution tanks in the polymer aluminum dissolving device of a certain factory. Usually, one of the solution tanks is selected for operation, and the other two are used as backup. According to the needs, select the drug storage tank and coagulant delivery pump to be operated on the DCS program operation interface in advance, shield one of the unused solution tanks, and set the low liquid level of the operating solution tank to 0.16m. When it is lower than the set low liquid level value, the DCS controls the solution tank to automatically switch to the standby solution tank for operation;

[0066] According to the turbidity of the raw water, set the filling height of the coagulant raw material solution to 0.19m, and set the amount of water to be added until the liquid level of the solution tank reaches 1.00m. The selected transfer pump pumps the coagulant raw material l...

example 2

[0069] There are two coagulant raw material liquid drug storage tanks, two coagulant delivery pumps, and three solution tanks in the polymer aluminum dissolving device of a certain factory. Usually, one of the solution tanks is selected for operation, and the other two are used as backup. According to the needs, select the drug storage tank and coagulant delivery pump to be operated on the DCS program operation interface in advance, shield one of the unused solution tanks, and set the low liquid level of the operating solution tank to 0.16m. When it is lower than the set low liquid level value, the DCS controls the solution tank to automatically switch to the standby solution tank for operation;

[0070] According to the turbidity of the raw water, set the filling height of the coagulant raw material solution to 0.25m, and set the amount of water to be added until the liquid level of the solution tank reaches 1.00m. The selected transfer pump pumps the coagulant raw material l...

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Abstract

The invention belongs to the technical field of chemical addition of flocculant of raw water treatment for power plants, and particularly relates to a system for automatically preparing a flocculant solution. The system comprises a chemical storage system, a chemical dissolving system, a conveying system and a DCS control system, wherein the DCS control system is electrically connected with the chemical storage system, the chemical dissolving system and the conveying system; a liquid outlet of the chemical storage system is connected with a liquid inlet of the chemical dissolving system through the conveying system; the chemical dissolving system is further connected with a water source; and valves and manual valves which are electrically connected or in air connection with the DCS control system are respectively arranged on the liquid inlet and a liquid outlet of the chemical dissolving system, a water inlet of the chemical dissolving system and the conveying system. The system for automatically preparing the flocculant solution is high in efficiency, labor and material consumption is reduced, and the problem that health of operators is damaged by dust and poisonous gas can be solved effectively.

Description

technical field [0001] The invention belongs to the technical field of coagulant dosing for raw water treatment in power plants, and in particular relates to a system and method for automatically preparing a coagulant solution. Background technique [0002] At present, polyaluminium chloride is widely used as coagulant in the pretreatment of raw water in thermal power plants to reduce the turbidity of raw water, so as to achieve the purpose of clarifying raw water. Polymerized aluminum has two forms: solid and liquid. When using a solid coagulant, it needs to be transported by manpower, poured into the solution tank and then added with water-soluble medicine, which consumes a lot of manpower; liquid aluminum chloride is available in barrels and supercars. The agent is also all carried by manpower, and the canned coagulant can be pumped into the solution tank by the lift pump to dissolve the drug. At present, whether it is a solid or liquid aluminum chloride coagulant, it ne...

Claims

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Application Information

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IPC IPC(8): B01F7/18B01F1/00G05B19/418C02F1/52
CPCG05B19/41865C02F1/52B01F21/30B01F21/10B01F27/90B01F2101/305
Inventor 高玉春
Owner 大唐南京发电厂
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