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

Vacuum carbonate desulfurization rich liquid double-effect desorption process and system

A vacuum carbonate and desulfurization rich liquid technology, which is applied in the petroleum industry, chemical industry, sustainable manufacturing/processing and other directions, can solve the problems of insufficient utilization of ammonia vapor waste heat and high energy consumption for hydrogen sulfide desorption, and achieve effective improvement. The utilization rate, the economic benefits are remarkable, and the effect of reducing the energy consumption of the device

Active Publication Date: 2017-01-04
大连科汇工程技术有限公司
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to propose a double-effect desorption process for desulfurization rich liquid by vacuum carbonate method, aiming at the high energy consumption of hydrogen sulfide desorption in the existing desulfurization rich liquid and the insufficient utilization of the residual heat of ammonia vapor. The multi-effect evaporation technology is adopted, and the ammonia vapor generated by the ammonia distillation tower is used as the heating heat source combined with the desulfurization rich liquid desorption process, which not only improves the removal efficiency of hydrogen sulfide in coal gas, but also effectively improves the utilization rate of energy

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
  • Vacuum carbonate desulfurization rich liquid double-effect desorption process and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment discloses a double-effect desorption process for desulfurization rich liquid by vacuum carbonate method, and the process takes vacuum potassium carbonate method for desulfurization rich liquid of coke oven gas in a coking plant as an example.

[0039] In this embodiment, the double-effect desorption process for desulfurization rich liquid by vacuum carbonate method is as follows: figure 1 The shown vacuum carbonate desulfurization rich liquid double-effect desorption system.

[0040] The vacuum carbonate desulfurization rich liquid double-effect desorption system includes a first-level desorption tower 3, a second-level desorption tower 4, a second-level desorption tower reboiler 8, a condensate tank 19, a first ammonia distillation tower 1, and a second-level desorption tower. Second ammonia distillation tower 2 and acid vapor condenser system;

[0041] The semi-rich liquid outlet at the lower end of the secondary desorption tower 4 is connected to the...

Embodiment 2

[0056] This embodiment discloses a double-effect desorption process for desulfurizing rich liquid by vacuum carbonate method. The process adopts coke oven gas vacuum potassium carbonate method for desulfurizing rich liquid in a coking plant. The desorption system used is basically the same as that in Example 1, except that the vacuum carbonate desulfurization rich liquid double-effect desorption system is only provided with a first ammonia distillation tower 1 and does not have a second ammonia distillation tower 2 .

[0057] In this embodiment, the double-effect desorption process for desulfurization rich liquid by vacuum carbonate method includes the following steps:

[0058] The potassium carbonate desulfurization rich liquid containing hydrogen sulfide 5g / L that comes from the desulfurization unit enters from the upper part of the secondary desorption tower 4, and carries out countercurrent contact with the rising steam in the secondary desorption tower 4, and desorbs all o...

Embodiment 3

[0065] This embodiment discloses a double-effect desorption process for desulfurizing rich liquid by vacuum carbonate method. The process adopts coke oven gas vacuum potassium carbonate method for desulfurizing rich liquid in a coking plant. The desorption system used in this process is basically the same as that in Example 1, except that the vacuum carbonate desulfurization rich liquid double-effect desorption system is only provided with the second ammonia distillation tower 2 and does not have the first ammonia distillation tower 1 .

[0066] In this embodiment, the double-effect desorption process for desulfurization rich liquid by vacuum carbonate method includes the following steps:

[0067] The potassium carbonate desulfurization rich liquid containing hydrogen sulfide 6g / L from the desulfurization unit enters from the upper part of the secondary desorption tower 4, and in the secondary desorption tower 4, it is countercurrently contacted with the rising steam, and is de...

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 provides a desulfurization liquid enrichment dual-effect desorption process and system by virtue of a vacuum carbonate method. On one hand, by a multi-effect evaporation technology, desorption gas produced by a first-stage liquid enrichment desorption is used as a heating heat source for a second-stage liquid enrichment desorption so that the effective utilization of the energy source is increased and significant economic benefits are achieved; and simultaneously, semi-enriched liquid obtained by the second-stage desorption is further heated and stripped by virtue of the first-stage desorption. On the other hand, from the view of reducing the energy consumption of the device and improving the energy efficiency, the low-grade waste heat of the plant is integrated and recycled to a maximum extent, ammonia generated by an ammonia stripper and used as the heating heat source is combined with the desulfurization liquid enrichment desorption process to form the vacuum carbonate liquid enrichment desorption process which has advantages of efficiency and energy conservation. By the desulfurization liquid enrichment dual-effect desorption process through the vacuum carbonate method, the removal efficiency of hydrogen sulfide in coal gas is increased and meanwhile, the utilization rate of energy sources is improved. The desulfurization liquid enrichment dual-effect desorption process by virtue of the vacuum carbonate method is mainly applicable to the field of desulfurization of coal gas by virtue of the vacuum carbonate process.

Description

technical field [0001] The invention relates to a desulfurization rich liquid double-effect desorption technology, in particular to a vacuum carbonate desulfurization rich liquid double-effect desorption process and system. Background technique [0002] At present, the vacuum carbonate gas desulfurization process used in China is to absorb hydrogen sulfide in the gas with a carbonate (sodium carbonate or potassium carbonate) aqueous solution (ie, lean liquid), and the rich liquid for carbonate desulfurization is stripped by heating. method to desorb hydrogen sulfide. The essence of the existing vacuum carbonate desulfurization rich liquid desorption process is the traditional vacuum desorption, that is, the rich liquid is heated and stripped in a single stage under the pressure of 0.01-0.02MPa(A). The hydrogen sulfide content in the liquid is 0.8-1.2g / L, resulting in the hydrogen sulfide content of the gas desulfurization can only reach 300-500mg / m 3 . Moreover, the exist...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C10K1/10
CPCC10K1/105Y02P20/10Y02P20/129
Inventor 薛斌
Owner 大连科汇工程技术有限公司