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

Sulfur resisting transform technique under low water / gas for gasifying powdered coal

A technology of sulfur-resistant conversion and process, which is applied in the field of sulfur-resistant conversion process of the first reactor, which can solve the problems of not being able to take out heat in time, low space velocity, and sudden rise in bed temperature, and achieve the effect of prolonging the service life

Active Publication Date: 2011-04-13
青岛联信催化材料有限公司 +2
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual industrial operation results show that when the space velocity of the reaction is lower than 3000h-1, even if the water / gas ratio is 0.27, which is much higher than the researched value of 0.20, the reaction heat will accumulate due to the large amount of heat released by the reaction and cannot be taken out in time. Cause the methanation side reaction to occur, causing the bed temperature to rise sharply
Therefore, in actual industrial application, when water / gas=0.20, due to the low space velocity, it is impossible to achieve the effect of lowering the bed temperature, and at the same time, the degree of methanation side reaction is relatively high

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
  • Sulfur resisting transform technique under low water / gas for gasifying powdered coal
  • Sulfur resisting transform technique under low water / gas for gasifying powdered coal
  • Sulfur resisting transform technique under low water / gas for gasifying powdered coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The crude gas from the "Shell" pulverized coal gasification process directly enters the gas-liquid separator, and the crude gas coming out of the top of the separator is heated to 190°C, enters the detoxification tank to remove impurities, and then enters the first reactor for shift reaction , the volume content of dry basis CO in the raw gas entering the first reactor inlet is 61%, the first reactor inlet temperature is 190°C, the water / gas volume is 0.15, and the space velocity is 6000h -1 , the reaction pressure is 3.0MPa, the hot spot temperature of the first reactor bed is 330°C, the shift gas CO content from one section is 45% relative to the dry basis, and enters the subsequent section for the shift reaction, and finally becomes a reaction by-product The amount of methane emitted is 0.01% by volume on a dry basis.

Embodiment 2

[0028] The crude gas from the "Shell" pulverized coal gasification process directly enters the gas-liquid separator, and the crude gas and water vapor from the top of the separator are heated together to 200°C, enter the detoxification tank to remove impurities, and then enter the first reaction In the first reactor, the volume content of CO on a dry basis in the crude gas entering the first reactor inlet is 63%, the first reactor inlet temperature is 200°C, the water / gas volume ratio is 0.20, and the space velocity is 7000h -1, the reaction pressure is 3.6MPa, the hot spot temperature of the first reactor bed is 380°C, and the shift gas CO content from one section is 40% relative to the dry basis, and enters the subsequent section for the shift reaction, and finally becomes a reaction by-product The amount of methane emitted is 0.3% by volume on a dry basis.

Embodiment 3

[0030] The crude gas from the "Shell" pulverized coal gasification process directly enters the gas-liquid separator. The crude gas from the top of the separator and the water vapor from the medium-pressure boiler are heated together to 190°C and enter the detoxification tank to remove impurities. , into the first reactor for shift reaction, wherein the dry base CO volume content in the crude gas entering the first reactor inlet is 69%, the water / gas volume ratio is 0.18, the first reactor inlet temperature is 190°C, and the water gas The volume ratio is 0.20, and the space velocity is 7000h -1 , the reaction pressure is 3.6MPa, the hot spot temperature of the first reactor bed is 355°C, and the shift gas CO content from one section is 50% relative to the dry basis, and enters the subsequent section for the shift reaction, and finally becomes a reaction by-product The emission of methane is 0.12%.

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

This invention relates to a process for gasifying pulverized coal at a low water / gas ratio by sulfur-tolerant conversion. The process comprises: introducing crude coal gas into a gas-liquid separator, heating the crude coal gas exhausted from the separator top to 180-220 deg.C, removing impurities, sending to a first reactor, and performing sulfur-tolerant conversion. In the first reactor, the water / gas volume ratio at the inlet is 0.15-0.20; the temperature at the inlet is 180-220 deg.C; the hot-point temperature of the bed layer is 330-400 deg.C; the space velocity is 6000-9000 h<-1>; the reaction pressure is 3.0-4.0 MPa; the CO volume content in the crude coal gas at the inlet is 55-70%. The process has such advantages as low water / gas ratio and low energy consumption.

Description

technical field [0001] The present invention relates to a pulverized coal gasification low-water / gas sulfur-resistant conversion process using coal as raw material, that is, a sulfur-tolerant conversion process for production of ammonia synthesis gas, oxo synthesis gas and city gas by Shell pulverized coal gasification, specifically relates to a A sulfur-tolerant shift process for the first reactor that uses crude gas as raw material and uses Shell pulverized coal gasification to produce ammonia synthesis gas, carbonyl synthesis gas and city gas. Background technique [0002] Since the beginning of the 21st century, due to the impact of increasingly tense oil resources, my country's coal chemical industry has entered a stage of rapid development. Projects such as coal gasification to ammonia, methanol to methanol, and coal to gasoline have been fully launched, and many have been introduced in succession. Set Dutch Shell company to develop pulverized coal gasification process ...

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): C10J3/00
CPCY02E20/18
Inventor 纵秋云刘捷李兆军张骏驰马勇李兆胜郑明峰
Owner 青岛联信催化材料有限公司