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Gasification system and technology for efficient heat recovery

A heat recovery and gasification system technology, applied in the gasification process, chemical industry, petroleum industry, etc., can solve the problems of waste pot abrasion, short service life, complex fly ash removal system, etc., and achieve high heat recovery efficiency, The effect of small equipment size and high saturated steam output

Pending Publication Date: 2018-11-13
BEIJING AEROSPACE MWAY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention solves the technical problems of the syngas gasification process and system in the prior art, such as low efficiency of recovery and utilization of sensible heat, serious abrasion of the waste pot leading to short service life, and complex fly ash removal system, and further provides a A syngas gasification system and process that can significantly reduce the sensible heat entering black water, improve the use efficiency of waste pots, and simplify the fly ash removal system

Method used

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  • Gasification system and technology for efficient heat recovery
  • Gasification system and technology for efficient heat recovery
  • Gasification system and technology for efficient heat recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a gasification system with high-efficiency heat energy recovery, which can be used to prepare downstream chemical products, such as figure 1 As shown, the gasification system includes: a gasification furnace 1 for preparing syngas and performing radiation heat exchange, and the gasification furnace 1 includes a gasification chamber 11 and a radiation heat exchange chamber 12, described in this embodiment The gasification furnace 1 adopts a structure in which the gasification chamber 11 and the radiation heat exchange chamber 12 are integrated, such as figure 2 shown.

[0044] The radiation heat exchange chamber 12 described in this embodiment is arranged below the gasification chamber 11, and a raw material inlet 111 is arranged on the top of the gasification chamber 11. The radiation heat exchange chamber 12 includes an internal Cylinder 126 and outer cylinder 124; the inner and outer wall surfaces of the inner cylinder 126 and the inner wall...

Embodiment 2

[0064] This embodiment provides a high-efficiency heat energy recovery gasification system, which can be used to prepare downstream fuel gas or IGCC products, such as Figure 5 As shown, the gasification system includes:

[0065] A gasifier 1 for preparing syngas and performing radiative heat exchange, the gasifier 1 described in this embodiment is the same as that in Embodiment 1.

[0066] The gas-solid separation and cooling ash equipment 2 is arranged in communication with the synthesis gas outlet of the gasifier 1; the gas-solid separation and cooling equipment in this embodiment includes a cyclone separator 21, and this embodiment adopts a two-stage cyclone configuration, The particle size of fly ash in syngas can be controlled to be ≤1μm.

[0067] The convective heat exchange device 3 communicates with the gas outlet of the cyclone separator 21, and is used to recover the sensible heat of the synthesis gas and generate power steam; the convective heat exchange device 3 ...

experiment example

[0077] The process system in this application can effectively recover the high-temperature heat energy in the syngas, with (CO+H 2 ) with an output of 100,000Nm 3 / h, the average reaction temperature in the gasification chamber 11 is 1400 DEG C, and the annual operation time is 8000 hours as the basis for estimating the production value in Example 1 and Example 2, the results are shown in the table below:

[0078]

[0079] Note: The price of 10MPag power steam is calculated at 120 yuan / ton, and the price of circulating cooling water is calculated at 0.1 yuan / ton.

[0080] It can be seen from the above table that the ratio of high-temperature sensible heat in the syngas converted to 10.0 MPag grade power steam can reach 50-70%. This process can produce 10.0MPag grade power steam 50-65 tons / h (non-chemical product scheme is 70-80 tons / h), and the annual output value is 48.62-63.02 million yuan (non-chemical product scheme is 67.78-77.38 million yuan) At the same time, the c...

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Abstract

The invention provides a gasification system for efficient heat recovery. The system comprises a gasification furnace, gas-solid separation and ash cooling equipment, a convective heat exchange device, gas scrubbing equipment and a black water treatment system, wherein a spraying device is arranged on a heat transfer surface in a radiation heat transfer chamber of the gasification furnace, so as to form a lower temperature zone close to the heat transfer surface and a core high temperature zone on one side, far from the heat transfer surface, of the lower temperature zone; the gas-solid separation and ash cooling equipment is communicated with a synthesis gas outlet of the gasification furnace; the convective heat exchange is used for recycling sensible heat of synthesis gas and producingpower steam; the gas scrubbing equipment comprises a venturi scrubber and a scrubbing tower which are connected in series; the black water treatment system comprises a primary flash distillation device and a secondary flash distillation device. The invention further provides a gasification technology for efficient heat recovery. The scheme adopts a radiation heat exchange chamber adopting a borderland temperature control technology, not only guarantees the safety of a heat exchange tube, but also guarantee high heat recovery efficiency, higher yield of saturated steam and smaller equipment volume under high radiation intensity.

Description

technical field [0001] The invention belongs to the technical field of synthesis gas, and in particular relates to a gasification system and process capable of efficiently recovering heat energy aimed at chemical products, fuel gas and IGCC. Background technique [0002] Synthesis gas is produced from coal, petroleum, coal coke and other carbonaceous materials (mainly composed of CO and H 2 ) gasification technology, as an important means of clean utilization of fossil raw materials, has been widely used in fuel gas, syngas, IGCC and other fields. During the gasification reaction, most of the chemical energy of carbonaceous raw materials is converted into chemical energy of syngas, but about 20% of the chemical energy is still converted into sensible heat of syngas and ash, resulting in heat loss. How to improve the recovery and utilization efficiency of this part of sensible heat is of great significance to the production of chemical equipment and energy saving and consump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/00C10J3/72C10J3/84C10J3/86
CPCC10J3/00C10J3/72C10J3/84C10J3/86C10J2300/1615C10J2300/1687C10J2300/169C10J2300/1807C10J2300/1269Y02P20/10
Inventor 赵静一黄萍毛炜张燕
Owner BEIJING AEROSPACE MWAY TECH CO LTD
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