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Water replenishing device

A supplementary and water pump technology, applied in water shower coolers, lighting and heating equipment, direct contact heat exchangers, etc. Unreasonable and other problems, to achieve the effect of constant pH value control, stable pH value control, and smooth operation

Active Publication Date: 2016-10-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that the supplementary device for quenching tower water in the ammonia oxidation reaction device existing in the prior art is unreasonable. The pH value is unstable, the ammonia neutralization effect is not good, and the liquid level of the tower kettle fluctuates greatly. A new water replenishing device is provided.
[0005] The second technical problem to be solved by the present invention is that the supplementary method of the quench tower water in the ammoxidation reaction device existing in the prior art is unreasonable, and the replenishment water quantity of the quench tower is unstable, resulting in unstable operation of the quench system, and neutralizing liquid The pH value is unstable, the ammonia neutralization effect is not good, and the liquid level of the tower kettle fluctuates greatly. A new method of adding water is provided.

Method used

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  • Water replenishing device

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Effect test

Embodiment 1

[0040] Adopt the replenishing device of water of the present invention, the condensate from the four-effect evaporator is first added in the make-up water buffer tank, and the make-up water in the make-up water buffer tank is added to the bottom of the quenching tower by the make-up water pump, and the quenching tower adds The acid is sulfuric acid, the pH of the neutralizing solution is controlled at 5, the weight concentration of ammonium sulfate is 20%, and 4 layers of spray layers are arranged in the quench tower, which are composed of hollow cone nozzles arranged in a square, and the arrangement density of the nozzles is 2 nozzles / m 2 , the reaction gas inlet is equipped with a dendritic porous distributor, the pH value of the neutralizing liquid is controlled stably after spraying, the liquid level of the quench tower is stable, and the removal rate of ammonia in the reaction gas reaches 99.9%, and good technical results have been achieved .

Embodiment 2

[0042] A water replenishing device, comprising a water inlet from a four-effect evaporator, a supplementary water buffer tank, a supplementary water outlet, a supplementary water pump, a supplementary water pump inlet, a supplementary water pump outlet, a quench tower supplementary water inlet, and water from a four-effect evaporator The inlet and the supplementary water outlet are connected to the supplementary water buffer tank, the supplementary water outlet is connected to the supplementary water pump inlet, and the supplementary water pump outlet is connected to the supplementary water inlet of the quench tower; a flow meter and a regulating valve are set on the supplementary water pump outlet pipeline; The buffer tank is provided with a liquid level gauge; the inlet of the supplementary water for the quench tower is arranged at the upper and middle parts of the quench tower.

[0043] 95wt% of the condensate of the four-effect evaporator is first added to the make-up water...

Embodiment 3

[0046] The replenishment device of the quenching tower of the present invention comprises supplementary water buffer tank, supplementary water inlet of buffer tank, supplementary water outlet of buffer tank, supplementary water pump, supplementary water pump inlet, supplementary water pump outlet, supplementary water inlet 1 of quenching tower, supplementary water inlet of quenching tower II. The supplementary water inlet of the buffer tank and the supplementary water outlet of the buffer tank are connected to the supplementary water buffer tank, the supplementary water outlet of the buffer tank is connected to the supplementary water pump inlet, the supplementary water pump outlet is connected to the supplementary water inlet I of the quenching tower, and the supplementary water of the quenching tower Inlet II is directly connected to the quench tower.

[0047] The condensate of the 40wt% four-effect evaporator is first added to the make-up water buffer tank from the make-up w...

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Abstract

The invention relates to a water replenishing device and mainly solves problems of instability in operation, instability of pH value of neutralization liquid, poor ammonia neutralization effects and high tower liquid level fluctuation of a quenching system due to instability in quenching tower water replenishing and high flow fluctuation in an ammoxidation device in the prior art. The water replenishing device comprises a four-effect evaporator water inlet, a make-up water buffering tank, a make-up water outlet, a water replenishing pump, a water replenishing pump inlet, a water replenishing pump outlet and a make-up water inlet of a quenching tower. By the technical scheme that four-effect evaporator water enters the make-up water buffering tank and is added into the quenching tower by the water replenishing pump from the make-up water buffering tank, the problems are well solved. The water replenishing device can be applied to ammoxidation production devices.

Description

technical field [0001] The invention relates to a water replenishing device. Background technique [0002] In the production of acrylonitrile by propylene ammoxidation reaction, part of the wastewater in the recovery tower tank is treated by four-effect evaporation as supplementary water for the quench tower, and part of it is used for biochemical treatment. The supplementary water from the four-effect evaporator is directly added to the quenching tower by the liquid level control of the four-effect evaporator. Fluctuations occur due to changes, which will lead to large changes in the flow rate and temperature of the supplementary water of the quenching tower. The fluctuation of the supplementary water will lead to unstable pH value of the quenching tower, poor ammonia neutralization effect, and fluctuations in the liquid level of the quenching tower. Affect the normal operation of the quench tower. Therefore, adding stable four-effect make-up water to the quench tower is ...

Claims

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Application Information

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IPC IPC(8): F28F25/02F28F25/06F28F25/10
Inventor 顾军民熊瑾
Owner CHINA PETROLEUM & CHEM CORP