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Gasification system and process for high-efficiency recovery of heat energy via wet ash cooling method

A heat recovery and gasification system technology, applied in the gasification process, chemical industry, petroleum industry, etc., can solve the problems of low recovery and utilization efficiency of sensible heat, complex fly ash removal system, short service life, etc., to achieve Guaranteed long-term stable operation, reduced waste water discharge, and high heat recovery efficiency

Pending Publication Date: 2018-11-30
BEIJING AEROSPACE MWAY TECH CO LTD
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  • Summary
  • 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 synthetic gas gasification system and process using wet cold ash that can significantly reduce the sensible heat entering black water, improve the use efficiency of waste pots, simplify the fly ash removal system

Method used

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  • Gasification system and process for high-efficiency recovery of heat energy via wet ash cooling method
  • Gasification system and process for high-efficiency recovery of heat energy via wet ash cooling method
  • Gasification system and process for high-efficiency recovery of heat energy via wet ash cooling method

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Experimental program
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Effect test

Embodiment 1

[0042] This embodiment provides a wet cold ash type high-efficiency heat energy recovery gasification system, 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.

[0043] 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 t...

Embodiment 2

[0063] 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:

[0064] 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.

[0065] Gas-solid separation and wet ash cooling device 2, the gas-solid separation and wet ash cooling device 2 includes wet ash cooling equipment in which a cyclone separator 21 communicates with the dry ash outlet of the cyclone separator. The wet cooling ash equipment is a wet cooling tank 22, and a spraying device is arranged in the wet cooling tank 22, which is used for spraying cooling liquid to cool down the high-temperature dry ash, and the sprayed cooling Black water is formed after the liquid is mixed with dry ash, and a black water discharge port is arranged on the wet cooling tank 22 ...

experiment example

[0076] The process system in this application can effectively recover the high-temperature heat energy in the synthesis gas. The output of (CO+H2) is 100,000Nm3 / h, the average reaction temperature of the gasification chamber 11 is 1400°C, and the annual operation time is 8000 hours. The output value in basic estimation embodiment 1 and embodiment 2, the result is as shown in the table below:

[0077]

[0078] 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.

[0079] 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 (the fuel gas or IGCC product product scheme is 70-80 tons / h), and the annual output value is 48-62.4 million yuan (the fuel gas or IGCC product product scheme is 48-62.4 million yuan) 67.20-76.8 mil...

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Abstract

The invention provides a gasification system for high-efficiency recovery of heat energy via a wet ash cooling method. The gasification system comprises: a gasification furnace, wherein an injection device is arranged on a heat exchange surface in a radiant heat exchange chamber of the gasification furnace, thereby forming a low-temperature zone close to the heat exchange surface and a core high-temperature zone located at the side, away from the heat exchange surface, of the low-temperature zone; a gas-solid separation and wet ash cooling device, which is configured to communicate with the synthesis gas outlet of the gasification furnace; a convection heat exchange device, which is used for recycling the sensible heat of synthesis gas and produces power steam; a gas scrubbing equipment, which comprises a venturi scrubber and a scrubbing tower in series connection; and a black water treatment system, which comprises a primary flash distillation unit and a secondary flash distillation unit in series connection. The invention also provides a gasification process for high-efficiency recovery of heat energy. According to the invention, the radiant heat exchange chamber using a border area temperature control technology can ensure the safety of heat exchange tubes, higher heat recovery efficiency under high radiation intensity, higher saturated steam yield and smaller equipment size.

Description

technical field [0001] The invention belongs to the technical field of synthesis gas, and specifically relates to a gasification system and process for efficiently recovering heat energy by using a wet cold ash method targeting 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 e...

Claims

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Application Information

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