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Coal gasification device utilizing coal melting collection and high-temperature waste heat recovering method

A waste heat recovery and coal gasification technology, which is applied in the gasification of granular/powdered fuel, chemical industry, and the manufacture of combustible gas, can solve the problems of large consumption and energy loss, and achieve high efficiency and high efficiency.

Inactive Publication Date: 2011-11-16
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems of energy loss and excessive consumption in the prior art, the present invention provides an ash fusion coal gasification device and a high-temperature waste heat recovery method, through which high-temperature energy can be recovered and water consumption can be saved at the same time

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  • Coal gasification device utilizing coal melting collection and high-temperature waste heat recovering method

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Embodiment Construction

[0033] Below in conjunction with embodiment, further illustrate the present invention.

[0034] Such as figure 1 As shown, the feed water of the drum 3 is first heated by the economizer 6 and then sent to the drum 3 . The drum 3 forms a natural circuit with the first stage of evaporation 2 and the second stage of evaporation 5 through the ascending pipe 13 and the descending pipe 14 . The saturated steam 12 that comes out of the drum 3 flows through the heater 4 to be heated to the required steam temperature, and then enters the steam system 8.

[0035] The 900°C high-temperature gas 10 first passes through the evaporating stage 2 to make the temperature reach a suitable temperature. After entering the superheater 4, the gas 11 after evaporating the second stage 5 and the economizer 6 reaches 200°C and enters the subsequent process system 7 .

[0036] The first stage of evaporation 2 adopts the adjustment of heat extraction capacity to control the outlet gas temperature, whi...

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Abstract

The invention discloses a coal gasification device utilizing coal melting collection and a high-temperature waste heat recovering method. The device comprises a gasification furnace (1), a primary evaporation section (2), a superheater (4), a secondary evaporation section (5), an economizer (6) and a drum (3), wherein the gasification furnace (1) is connected with the primary evaporation section (2); the primary evaporation section (2) is connected with the superheater (4); and the superheater (4) is successively connected with the secondary evaporation section (5) and the economizer (6). The high-temperature waste heat recovering method comprises the following steps: entering high-temperature gas into the primary evaporation section (2) and then successively passing through the superheater (4), the secondary evaporation section (5) and the economizer (6). According to the device and method, high-temperature energy can be effectively utilized so that high efficiency is achieved, and the recovering efficiency of waste heat reaches larger than or equal to 65%.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a method for recovering high-temperature waste heat of an ash-melted coal gasification device. Background technique [0002] With the improvement of the requirements for energy saving and consumption reduction, the requirements for the rationality and effectiveness of energy utilization are becoming more and more stringent. At present, there is no heat recovery process matching the ash fusion coal gasification process, but in the small experimental device, it relies on water spraying to reduce the temperature to meet the requirements of the downstream process. In other similar foreign coal gasification devices, either a water spray system is installed in the gasifier to reduce the temperature and then enters the heat exchanger to enter the downstream process, or it directly enters the downstream process device after water washing and cooling. These methods have all caused t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/72C10J3/82C10J3/54C10J3/48C10J3/20
CPCY02P20/10Y02P20/129
Inventor 黄少敏张蓉生戴文松郭志雄蒋荣兴
Owner CHINA PETROCHEMICAL CORP
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