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A method for joint production of synthesis gas based on slurry gasification and natural gas conversion

A technology of joint preparation and synthesis gas, applied in the field of coal chemical industry, can solve the problems of large emissions, waste of resources, power, and high H2 content

Active Publication Date: 2017-04-12
THE NORTHWEST RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using natural gas as raw material to produce methanol, the H / C ratio in the produced synthesis gas is relatively high, and the H in the synthesis off-gas 2 High content, large emissions, resulting in serious waste of resources and power

Method used

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  • A method for joint production of synthesis gas based on slurry gasification and natural gas conversion
  • A method for joint production of synthesis gas based on slurry gasification and natural gas conversion
  • A method for joint production of synthesis gas based on slurry gasification and natural gas conversion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Embodiment 1: The present invention is based on slurry gasification and natural gas conversion to jointly prepare synthesis gas

[0085] The composition of coal used in this example is listed in Table 1, and the composition of natural gas (by volume on a dry basis) is listed in Table 2.

[0086] Table 1: Composition of Raw Coal

[0087]

[0088] Table 2: Dry Basis Composition of Natural Gas, by Total Volume

[0089]

[0090] According to this specification, this embodiment figure 1 The described process flow is carried out.

[0091] The specific implementation steps are as follows:

[0092] Raw coal with a moisture content of 10% is about 25010.66kg / h, and water and a small amount of additives (highly polymerized sodium naphthalene sulfonate) are used to make a slurry with a concentration of 60% by weight of dry coal, and the flow rate of the slurry is about 37515.98kg / h , the slurry is sent to the nozzle 8 through the slurry pipeline 14, and the flow rate th...

Embodiment 2

[0103] Embodiment 2: The present invention is based on slurry gasification and natural gas conversion to jointly prepare synthesis gas

[0104] The present invention is carried out with a local coal as the main raw material. The raw coal analysis data is listed in Table 3, and the dry basis composition of natural gas is listed in Table 4.

[0105] Table 3: Composition of Raw Coal

[0106]

[0107] Table 4: Dry Basis Composition of Natural Gas, by Total Volume

[0108] Element CH 4

C 2 h 6

C 3 h 8

N 2

h 2 S

volumevol% 95.0％ 1.0％ 0.9％ 3.0％ trace

[0109] The specific implementation steps of this embodiment are the same as those of Example 1, except that the raw coal in a certain place is 13291.9kg / h, and water and a small amount of additive (highly polymerized sodium naphthalenesulfonate) are used to make a material with a concentration of 56% and a flow rate of 20623.8kg / h. Slurry, oxygen flow rate 12237.2Nm 3 / h, t...

Embodiment 3

[0114] Embodiment 3: The present invention jointly prepares synthesis gas on the basis of slurry gasification and natural gas conversion

[0115] The present invention is implemented with coal from a certain place as the main raw material. The raw coal analysis data is listed in Table 5, and the dry basis composition of natural gas is listed in Table 6.

[0116] Table 5: Composition of Raw Coal

[0117]

[0118] Table 6: Dry Basis Composition of Natural Gas, by Total Volume

[0119]

[0120] The specific implementation steps of this embodiment are the same as those in Example 1. The raw coal in a certain place is about 14503.07kg / h, and water and a small amount of additive (highly polymerized sodium naphthalene sulfonate) are used to make a concentration of about 57%, and a flow rate of 25443.99kg / h slurry, oxygen flow rate 8628.82Nm 3 / h, the slurry and oxygen are sprayed into the gasification furnace 1 through the nozzle 8, the gasification reaction pressure is 4.2MP...

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Abstract

The invention relates to a method for combined preparation of synthetic gas based on slurry gasification and natural gas conversion. The method comprises the following steps: slurry gasification, natural gas conversion, synthetic gas preparation, etc. The method has the advantages of wide raw material source, high integrated utilization efficiency of raw materials, reasonable energy utilization, low refuse discharge amount, mature unit assemblytechnology, easily adjustable synthetic gas H / C ratio, high added value of product, distinctive scale merit, etc. By means of gas preparation, the synthetic gas H / C ratio can be adjusted in the range of 1.0-2.0. After the gas preparation, the synthetic gas obtained in the step A and the step B does not needed to be converted or a little of gas is convertedtotally or mostly, and the synthetic gas can be directlyused as raw material formethanol synthesisandFischer-Tropsch synthesis of oil. By adopting the method provided by the invention, conversion of 40-600 Nm3 of synthetic gas is saved after gasification of each ton of coal and emission of CO2 is reduced by 20-300 Nm3 per ton of coal.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of coal chemical industry. More specifically, the present invention relates to a method for jointly producing synthesis gas based on slurry gasification and natural gas conversion. [0003] 【Background technique】 [0004] As we all know, in the world's mineral energy reserves, natural gas and coal account for a considerable proportion, and realizing the clean and efficient utilization of the above two natural resources has great practical and strategic significance. [0005] Coal resources have the largest reserves among fossil resources, and they are also the resources that are mined the most, used the most, and used the most ways. Among the various methods of coal resource conversion, the gasification method is the best way to realize the clean and efficient utilization of resources, avoiding the disadvantages of low thermal energy utilization rate of direct coal combustion and producing a large a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/38C10J3/46
CPCY02P20/52
Inventor 韦孙昌门长贵贺根良徐红东刘军徐宏伟崔意华林益安罗进成郑亚兰赵蒙
Owner THE NORTHWEST RES INST OF CHEM IND
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