Unlock instant, AI-driven research and patent intelligence for your innovation.

Automatic control device and method for amount of acid added into neutralization tower

A technology of automatic control device and reaction tower acid, applied in chemical instruments and methods, feeding devices, separation methods, etc., can solve the problems of low removal rate, increased organic polymer loss, equipment and pipeline blockage, etc., and achieve extended operation. cycle, reduce polymerization losses, and improve the effect of neutralization efficiency

Inactive Publication Date: 2016-10-05
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that the control device for the amount of acid added in the neutralization tower for the ammoxidation reaction gas existing in the prior art is unreasonable, the pH control value of the neutralization liquid is inaccurate, and the unreacted ammonia in the reaction gas The removal rate of ammonia is not high, and the neutralization is not complete, which leads to ammonia entering the follow-up system, resulting in increased polymerization loss of organic matter, blockage of follow-up towers, heat exchangers and other equipment and pipelines, and shortening the operation period of the device. Provide a medium and the automatic control device for the amount of acid added to the reaction tower

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Automatic control device and method for amount of acid added into neutralization tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An automatic control device for the amount of acid added to the neutralization reaction tower. The reaction gas and the neutralization liquid are contacted in countercurrent. The neutralization tower is equipped with two layers of neutralization liquid spray layers composed of hollow cone nozzles arranged in a square. The arrangement density is 2 nozzles / m 2, above the spray layer, set 2 theoretical plate bubble cap plates as demisters, set 6 theoretical plate grid fillers below the neutralizing liquid spray layer and above the reaction gas inlet, and set the dendritic porous type at the reaction gas inlet The distributor, the acid added to the neutralization tower is sulfuric acid, and an ammonia concentration detector is installed at the gas phase outlet of the neutralization tower. Through the measured ammonia concentration, the pH value of the neutralization solution is accurately adjusted to 4.5, and the pH value of the neutralization solution is automatically adjus...

Embodiment 2

[0029] An automatic control device for the amount of acid added to the neutralization reaction tower. The reaction gas and the neutralization liquid are in countercurrent contact. The neutralization tower is equipped with 8 layers of neutralization liquid spray layers composed of hollow cone nozzles arranged in a square. The arrangement density is 4 nozzles / m 2 , 4 theoretical plates of bubble cap plates are set above the spray layer as demisters, 6 theoretical plates of grid packing are set below the neutralizing liquid spray layer and above the inlet of the reaction gas, and the inlet of the reaction gas is set with a dendritic porous type The distributor, the acid added to the neutralization tower is sulfuric acid, and an ammonia concentration detector is installed at the gas phase outlet of the neutralization tower. Through the measured ammonia concentration, the pH value of the neutralization solution is accurately adjusted to 4.0, and the pH value of the neutralization so...

Embodiment 3

[0031] An automatic control device for the amount of acid added to the neutralization reaction tower. The reaction gas and the neutralization liquid are in countercurrent contact. The neutralization tower is equipped with 4 layers of neutralization liquid spray layers composed of hollow cone nozzles arranged in a square. The arrangement density is 2 nozzles / m 2 , 4 theoretical plates of bubble cap plates are set above the spray layer as demisters, 4 theoretical plates of grid packing are set below the neutralizing liquid spray layer and above the inlet of the reaction gas, and the inlet of the reaction gas is set with a dendritic porous type The distributor, the acid added to the neutralization tower is sulfuric acid, and an ammonia concentration detector is installed at the gas phase outlet of the neutralization tower. Through the measured ammonia concentration, the pH value of the neutralization solution is accurately adjusted to 3.5, and the pH value of the neutralization so...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an automatic control device and method for the amount of acid added into a neutralization tower. The device and method mainly overcome the problem of low neutralization efficiency of ammonia in reaction gas of an ammoxidation reaction in the prior art and the problems of increase of polymerization loss of organic matter, blockage of subsequently used equipment like towers and heat exchangers and pipelines and shortening of the operation cycle of equipment after ammonia enters a subsequent system in the prior art. The automatic control device comprises a shell, a reaction gas inlet, a reaction gas outlet, a reaction gas neutralization liquid inlet, a reaction gas neutralization liquid outlet, a neutralization liquid pH meter, an ammonia concentration detection system and an acid feeding port, wherein an ammonia concentration detection system is arranged at the reaction gas outlet, and the pH meter is arranged in front of the neutralization liquid inlet. The pH value of neutralization liquid is accurately set and the amount of acid added into a neutralization reaction is controlled and adjusted according to data detected by the ammonia concentration detection system, so the problems mentioned above are overcome; and the automatic control device can be used in an ammoxidation production apparatus.

Description

technical field [0001] The invention relates to an automatic control device and method for acid addition in a neutralization reaction tower. Background technique [0002] The reaction gas generated by the ammoxidation reaction contains unreacted ammonia, which must be removed in the neutralization tower, otherwise it will cause the polymerization of organic matter in the subsequent system, and the consumption of the device will increase, causing the tower, heat exchanger, pipeline, etc. And so on, the operation cycle is shortened, which affects the normal operation of the device. [0003] Adding acid into the neutralization tower can neutralize the ammonia and acid, and generally adjust the amount of acid added according to the pH value of the neutralization solution. However, in the actual device, due to the complex composition of the neutralization liquid in the neutralization tower and many components, after the acid is added, it not only reacts with the ammonia in the s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D53/78B01D53/58B01J19/00B01J4/00
Inventor 顾军民熊瑾
Owner CHINA PETROLEUM & CHEM CORP