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Coal gasification circulating water system

A circulating water system and coal gasification technology, applied in the field of coal gasification, can solve problems such as dew point corrosion, high thermal stress of nozzles and water-cooled coils, and affect the service life of nozzles, so as to prolong service life, reduce thermal stress, and improve dew point Effects of Corrosion Problems

Inactive Publication Date: 2014-12-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of the cooling water in the above-mentioned cooling water circulation loop is usually between 30°C and 40°C, so the temperature of the outer wall of the water-cooling coil is relatively low, and dew point corrosion is prone to occur; The internal thermal stress is large, which affects the service life of the nozzle

Method used

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  • Coal gasification circulating water system

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Embodiment Construction

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0025] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Thos...

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Abstract

The invention discloses a coal gasification circulating water system which comprises a steam pocket, a circulating pump, a gasification furnace, a nozzle water cooling pipe, an upper water cooling pipe and a lower water cooling pipe, wherein a water outlet, a water return opening and a steam outlet are formed in the steam pocket; the circulating pump is connected with the water outlet; a nozzle is arranged on the gasification furnace; the head of the nozzle extends into the gasification furnace; the nozzle water cooling pipe encircles the head of the nozzle; the inlet end of the nozzle water cooling pipe is communicated with the circulating pump; the outlet end of the nozzle water cooling pipe is communicated with the water return opening; the upper water cooling pipe is arranged at the upper part of a furnace cavity; the inlet end of the upper water cooling pipe is communicated with the circulating pump; the outlet end of the upper water cooling pipe is communicated with the water return opening; the lower water cooling pipe is arranged at the lower part of the furnace cavity; the inlet end of the lower water cooling pipe is communicated with the circulating pump; the outlet end of the lower water cooling pipe is communicated with the water return opening. According to the coal gasification circulating water system, the dew point corrosion to the nozzle water cooling pipe is improved, heat stress on the nozzle and the water cooling pipes is reduced, and the service life of the nozzle is prolonged.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a coal gasification circulating water system. Background technique [0002] Coal-water slurry gasifier process nozzle is one of the core equipment for pressurized coal gasification. Due to the high operating temperature of the gasifier, it is usually necessary to cool the nozzle head to ensure its service life. The nozzles in the related art adopt an independent cooling water circulation circuit: the nozzle cooling water from the nozzle cooling water tank passes through the cooling water pump and the cooler and then passes into the water cooling coil at the nozzle head to cool the nozzles, and the heated cooling water enters the soda water The separator separates the steam and water, and finally returns to the cooling water tank. The temperature of the cooling water in the above-mentioned cooling water circulation loop is usually between 30°C and 40°C, so the temperatu...

Claims

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Application Information

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IPC IPC(8): C10J3/48C10J3/50C10J3/76
Inventor 吕俊复刘青
Owner TSINGHUA UNIV
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