CN103752044A

CN103752044A - Cooling water-gas separator for coal water slurry gasification device burner

Info

Publication number: CN103752044A
Application number: CN201110319199.0A
Authority: CN
Inventors: 李俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-20
Filing date: 2011-10-20
Publication date: 2014-04-30

Abstract

The invention provides a cooling water-gas separator for a coal water slurry gasification device burner. The cooling water-gas separator for the coal water slurry gasification device burner comprises a separator main body, a blow-down pipe arranged on the top of the separator main body, a cooling water inlet and a cooling water outlet U-shaped pipe. A CO online monitor is arranged in the blow-down pipe. An overflow pipe is connected to the interior of the separator main body above the cooling water outlet U-shaped pipe. A nitrogen distributor is arranged below the opening of the overflow pipe. A nitrogen inlet is arranged outside the separator main body. A siphoning-breaking pipe is communicated with the cooling water outlet U-shaped pipe and the separator main body above the opening of the overflow pipe. The cooling water outlet U-shaped pipe and the siphoning-breaking pipe prevent formation of negative pressure in the separator. A nitrogen disperser is arranged below the opening of the overflow pipe so that CO in cooling water can be fully stripped, and the problem that CO is diluted by nitrogen fed into the separator so that an ideal CO concentration is difficultly detected on line is solved.

Description

For the cooling water gas and water separator of coal water slurry gasifying device burner

Technical field

The present invention relates to a kind of gas and water separator that can be used for coal water slurry gasifying device burner nozzle cooling water system.

Background technology

Coal water slurry gasification technique is that water-coal-slurry and oxygen spray into gasification furnace by burner, and the process of oxidation reaction generation synthesis gas (CO+H2) occurs under high-temperature and high-pressure conditions in gasification furnace.Coal water slurry gasifying device burner is at high temperature worked, and in order to protect burner, is provided with cooling coil and head water leg on burner, in order to prevent that cooling burner high temperature from damaging.Water in burner bosh, after cooling, is sent in burner cooling coil.Go out the water of cooling coil through burner cooling water separator, by gravity current, flash back in mouth bosh, form the circulation of burner cooling water.Burner cooling water coil easily damages, high pressure synthesis gas in gasification furnace enters in burner cooling water coil, the effect of burner cooling water gas and water separator is that the CO in burner cooling water is separated, and by being positioned at, the content of CO on-line monitoring instrument on-line monitoring CO, to determine whether burner cooling water coil leaks.The carrier gas that in separator, logical low-pressure nitrogen is analyzed as CO, carrier gas enters atmosphere through blow-down pipe.

At present, due to the fluctuation of production operation, in burner cooling water gas and water separator, liquid level fluctuates up and down, easily forms negative pressure, and CO gas is drawn in burner bosh with burner cooling water, and blow-down pipe CO on-line monitoring instrument cannot measure CO concentration; Although pass into nitrogen in gas and water separator upper gaseous phase space, can offset a part of suction function, but it is very large to eliminate the required nitrogen amount of negative pressure completely, not only infeasible economically, and, as the carrier gas of CO on-line monitoring, due to the diluting effect of nitrogen, pass into nitrogen amount and cross conference and cause on-line monitoring to be difficult to obtain real CO concentration.Because burner cooling water gas and water separator exists the problem of this two aspect, cause and cannot judge burner cooling water coil leakage situation, interlock shutdown in time, causes the damage of burner on the one hand, and impact is normally produced; On the other hand, cause gasification furnace inner high voltage synthesis gas to enter low pressure burner cooling water system, line fracture, synthesis gas leaks into outside gasification furnace, meets incendiary source breaking out of fire blast, causes personnel's injures and deaths and property loss, and consequence will be very serious.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of cooling water gas and water separator for coal water slurry gasifying device burner.

The present invention solves the problems of the technologies described above adopted technical scheme: for the cooling water gas and water separator of coal water slurry gasifying device burner, comprise separator body and the blow-down pipe that is arranged at separator bodies top, and cooling water inlet and the U-shaped pipe of coolant outlet, in blow-down pipe, establish CO on-line monitoring instrument, cooling water goes out in the separator body above U-shaped pipe to be connected with overflow pipe, overflow pipe mouth of pipe below is provided with nitrogen gas distributor, and nitrogen inlet is arranged at separator, and this is external.

As further improvement, the U-shaped pipe of coolant outlet and separator body and be positioned at overflow pipe mouth of pipe top and be communicated with and be provided with brokenly siphon pipe.

The course of work: the cooling water from burner cooling water coil is entered in separator body by cooling water inlet, Coolant-Level raises gradually, when liquid level is elevated to after the overflow pipe mouth of pipe, cooling water enters in overflow pipe, by gravity, by the U-shaped pipe of coolant outlet, is flowed back in burner bosh.Under normal operation, in gas and water separator, be divided into the liquid Space of overflow pipe mouth of pipe bottom and the gas-phase space on top.Because burner cooling water outlet pipe is U-shaped form of tubes, and be connected with brokenly siphon pipe, can, when operation fluctuation, keep Coolant-Level in overflow pipe, prevent from forming negative pressure, in overflow pipe, cooling water is evacuated, and CO is brought in burner bosh.

Low-pressure nitrogen is entered by the nitrogen inlet being positioned at from device body bottom liquid Space, through nitrogen gas distributor, enters in separator body.By the homodisperse nitrogen of nitrogen gas distributor, increased and the contact area of cooling water, be conducive to the stripping of CO.Nitrogen bubble moves upward, due to stripping effect, by the CO gas stripping dissolving in cooling water out.Its principle meets Henry's law (Henry's law is under uniform temperature and poised state, and the equilibrium partial pressure of the solubility of gas in liquid and this gas is directly proportional).CO in cooling water constantly by stripping out, enters in nitrogen bubble.The nitrogen that is carrying CO enters gas-phase space, along blow-down pipe 8, moves upward, and emptying, online CO monitor can detect CO concentration, when CO concentration reaches interlocking value, gasification furnace interlock shutdown.

Beneficial effect of the present invention is: the U-shaped pipe of coolant outlet and broken siphon pipe are set prevent the formation of negative pressure in separator; Nitrogen dispersion device is arranged at the below of the overflow pipe mouth of pipe, and the abundant CO in stripping cooling water during use has solved existing separator and passed into nitrogen and cause CO to be diluted, and on-line monitoring is difficult to obtain the problem of real CO concentration;

Accompanying drawing explanation

Fig. 1, the present invention are used for the structural representation of the cooling water gas and water separator of coal water slurry gasifying device burner.

The specific embodiment

The cooling water gas and water separator for coal water slurry gasifying device burner as shown in Figure 1, comprise separator body 5 and the blow-down pipe 8 that is arranged at separator body 5 tops, and cooling water inlet 6 and the U-shaped pipe 4 of coolant outlet, in blow-down pipe 8, establish CO on-line monitoring instrument 9, cooling water goes out in the separator body 5 of U-shaped pipe 4 tops to be connected with overflow pipe 7, overflow pipe 7 mouth of pipe belows are provided with nitrogen gas distributor 3, and nitrogen inlet 2 is arranged at outside separator body 5.The U-shaped pipe 4 of coolant outlet and separator body 5 and be positioned at overflow pipe 7 mouths of pipe tops and be communicated with and be provided with brokenly siphon pipe 1.

The present invention is not only confined to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; though but in its shape or structure, do any variation, every have identical with a present invention or akin technical scheme, all within its protection domain.

Claims

1. for the cooling water gas and water separator of coal water slurry gasifying device burner, comprise separator body (5) and be arranged at the blow-down pipe (8) at separator body (5) top, and cooling water inlet (6) and the U-shaped pipe of coolant outlet (4), in blow-down pipe (8), establish CO on-line monitoring instrument (9), it is characterized in that: cooling water goes out in the separator body (5) above U-shaped pipe (4) to be connected with overflow pipe (7), overflow pipe (7) mouth of pipe below is provided with nitrogen gas distributor (3), nitrogen inlet (2) is arranged at outside separator body (5).

2. the cooling water gas and water separator for coal water slurry gasifying device burner according to claim 1, is characterized in that: the U-shaped pipe of coolant outlet (4) and separator body (5) and be positioned at overflow pipe (7) mouth of pipe top and be communicated with and be provided with brokenly siphon pipe (1).