JPS5849789A - Control of furnace for gasifying coal and its device - Google Patents

Abstract

PURPOSE:To enable the stable continuous operation of the gasification of coal re-gardless of the kind of coal, etc. and to raise the operation reliability of a furnace for gasifying coal, by watching and detecting directly the flowing and dropping state of slug and controlling the feed of an oxidizing agent. CONSTITUTION:Coal is gasified with keeping the ash operated at high pressure under the state of molten slug. The molten slug is made to flow from the slug tap 6 opening to the center of the bottom of a gasifying furnace to the water tank 7 for cooling slug, quenched, slurried, and taken out of the gasifying furnace. The flowing and dropping state of the molten slug from slug tap 6 is directly watched and detected by the detector 8 or 9, the control valve 11 for oxidizing agent is regulated, and the feed amount of the oxidizing agent is changed. Consequently, the size of the open hole part of the slug tap 6 is adjusted to a proper size.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the control of a still temperature and high pressure coal gasifier that processes ash in a bath-melted state, and in particular maintains the slag slag in a clean straight-cut state. Gasification C: Concerning a method and method for monitoring the flow of sludzo from and controlling the required amount of oxidizing agent (oxygen or 9 gas) to maintain it in an optimal state.

When using 69W gasification to obtain fuel gas or raw material gas, the gasifier is gradually operated at higher temperatures and cylinder pressures due to the gasification effect and increased processing noise. (It's two.

However, when the temperature of the gas and furnace circle is raised to 11-00℃ or higher, the ash begins to melt and phenomena such as clinker formation or general melting occur, resulting in the occurrence of troughs such as 7-circle blockage.
Ru. For this purpose, the inside of the furnace is heated to a temperature where the ash is melted, and the lower part of the furnace is heated as a bath melting slurp.

A single-layer bath type gasification furnace is used.

In such a gasifier, the temperature in the lower brewing reaction zone of the gasifier is 1200~. At 2,000℃, the refractory material suffers corrosion and is unable to withstand two hours of operation.

For this reason, the outside of the refractory month is 1 jltl T, that is, the gasifier shell: Emizuichiboku and marked, and the circle' rigid is m melted slag 1.
The method of cello coating is used, which covers the fireproof material by covering it with two layers and blocking the silence. The 41st rule for +mt hole material is TV /, lJ /: +9), and the inside of the furnace is c
The 1st speed gradient changed, and the contact between the 111Jr's shocking expression 1 and the scrub [in the river, Surazo was going l1lU1,
The slang expression of high leprosy is maintained in a state where it flows down from the medium-heated slazo tap. )・
It's too thick for a d slazo to be able to hold one elbow large lumber.
It is necessary that pj is formed.

Conventionally (in a lime gasification furnace using a NONO slug tap,
The temperature inside the furnace is changed and the temperature is increased; According to
LCI/'1◇.

However, the quality of the coal is unstable and sticky, and the ash content and bath temperature are constant (and the temperature is constant, and it cannot be said to be gold). It is also necessary to make gas 1 in the same gasifier,
The control is not i + J function C two 4゜ the nature of the ash of the supplied coal'
If the fiber j cut on α is not set (6 molten slag layers are more than necessary (2 high) or J, l, J-<
There is Natari Ding 67a@. If the thickness is very small, the Slazo layer will disappear and the M-Otsuki will be eroded, or it will get thicker, and the Slazo tap will be installed one by one.

This light is ↑ double power j1ff, ':', 發J, + prevention, 9.11 of fluctuations in coal type, quality variation, ash content, bathing temperature, etc. (-) 11 ν, '5 (2, Shiijiru Yo Enemy Oki)'s 1 joint Aya d1 tablet... ◇ The coal gasifier was stabilized in the direction. It is old.

According to the present specification, the 4-drilling supply mechanism is directly connected to the slug hole in the slug cooling water tank (by means of the slug tab hole detector installed on the side wall or above the water surface). l [or total aperture diameter measurement detection T gold 11 brown,
Due to the detected Surazo tap opening, the supply of oxidizing agent is caused by reverse interference.)6! I 1I) II depends on the lineage (there are two).

Below is part 19 of the present invention! I will leave and explain to you.

1 is a gas furnace, 2 is a burner, 6 is a bath molten slag layer, 4
is the coal supply pipe, 5 is the oxidizer supply pipe, 6 equipment, 1゛1 is relative 1
The L agent control cape valve 12 is a level detector 16 at the outlet of the gasifier.

In a high ml gasifier, there are usually 4 or more burners, and coal? 1 in Tanzenyar so as to swirl in gasification/p.
The shell shooting method is generally used, but coal is supplied by circulating gas, steam, etc., or by water slurry +1-(-,
, :ゎFluid transport (this place -2 is used to transfer it to the gasifier 1; it,, gold.

The burner 2 is heated by a bath molten slag layer 6 (at the bottom of the furnace, a slag bath footprint; in the case of heating, it is combined with an oxidizing agent (oxygen or air) 5, which is supplied separately, In addition, water gasification and other (1) 1.1", i are gasified. The phase gas produced by the reaction flows out from the gasifier outlet 16J. The ash content in the coal is The bath melts due to the commercial temperature, flows on the surface of the slazo and enters the bottom of the gasification furnace -% t: 51
1 D from Skugtasob 6 to Slangme 9's water tank 7.

Bath melt sluzzo or slug tab 6. r:, the flow situation is, if the power of the leisure agent is θヱ1 less and the swog temperature is 7g, the flow of the slud will be sad,
The opening part of Sunonogutatsubu 6 becomes smaller due to the same right side of Surazo, and if there is a comparatively large Surazo temperature in one place, the Surazo that was in the same place before will start to flow out. The opening of the slazo tap 6 becomes larger. When the sludge flows down and rises to the slang cooling water monk 7, due to the difference in temperature, the sludge is crushed and turned into granules.

A human detection detector 8 (or?, a detector with a converter) at the opening of this snog tassock 6 (detects from the second 7, converter 10
(A signal is emitted from the second terminal to control the oxidizing agent control valve 11 to normalize the supply amount of the oxidizing agent. By this method, the size of the opening of the slotted tap 6 is controlled to a predetermined size.

At the detection end of detector 8 or 9, inert gas N2
Alternatively, the detection lens can be protected from falling objects and water droplets by flowing CO2, steam, etc. The water level in the Surazo cooling water tank is kept constant by a level detector 12.

In the high-temperature gasifier that forms bath melt sludge, the temperature inside the furnace is controlled so that the temperature is always suitable for the coal ash to flow into the bath melt, but due to fluctuations in furnace load, changes in coal type, ash bath melt
Due to the difference in temperature, the maximum JaI temperature is not necessarily the same. In addition, there is the problem that the life of temperature detectors at high temperatures is short. Although it is necessary to maintain the flow rate within a range, in a coal gasifier that employs extraction of the bath molten slazo using a slazo tap, it is necessary to appropriately maintain the flow state of the bath-slazo.

For example, when converting coal A with an ash flow @ temperature of 1230°C to gas, - for example, the area of the slazo tap is detected using a power selling type detector, and the rR cable is supplied - 6J! It was operated with 474 ψ 1 of heavy sound sails.

Then, when the ash flow @temperature is 1360 °C and B coal sound is used, the output of the d detector decreases, and the opening area of the slug tap shows a predetermined value, indicating that the slug flow situation is appropriate. was maintained.

According to the present invention, by directly monitoring and detecting the flowing state of the sludder and controlling the side supply of the gasifying agent, the gasification reaction can be stably continued, and the operational reliability of the coal gasifier can be improved. It can be greatly increased.

[Brief explanation of drawings]

FIG. 1 is a direct explanatory diagram showing an embodiment of the present invention. 1; Gasifier 2; Parker 6; Bath melt slag layer 4: Coal supply pipe 5; Oxidizing agent supply pipe 6; Slug tap 7; Slang cooling water tank 8; Slazzo tap detector 9; Slazzo tap detector (with converter) 10 ;converter
11; Flashing agent control valve 12 Nirepel detector 16; Gasifier outlet 14; Detection difficulty 15 Nislax slurry 5

Claims (1)

[Claims] 1. Coal is gasified by operating under pressure to put the ash in a molten slazo state, and this bath molten sludge is rapidly cooled into a slurry outside the gasifier system (a method of coal gasification at two stations). A method for controlling a coal gasifier, characterized by controlling the oxidizing agent supplied so as to form a #-slag layer in the gasifier. 2. Coal supply control and oxidizer supply officer? In a coal gasification furnace in which a slag cooling water Wjt is provided through a slag flow hole, a lag tap detector is installed in the slug cooling water tank, and the detected value of the slug tap opening curve is inputted to a computer to obtain the desired value. A control table for a coal gasifier, characterized in that a circuit for controlling the supply of a gasifying agent is provided.