CN104046395A

CN104046395A - Solid-gas mixed material pressure continuous-reduction technology and system and equipment therefor

Info

Publication number: CN104046395A
Application number: CN201410051335.6A
Authority: CN
Inventors: 和楷哲
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-02-15
Filing date: 2014-02-15
Publication date: 2014-09-17
Anticipated expiration: 2034-02-15
Also published as: CN104046395B

Abstract

The invention relates to a solid-gas mixed material pressure continuous-reduction technology and a system therefor. The solid-gas mixed material pressure continuous-reduction technology solves the problem of high investment, material discontinuity, easy damage on system parts and poor reliability in solid-gas mixed material pressure continuous-reduction. Through use of solid phase control and gas phase pressure step-by-step reduction, it is avoided that solid phase particle abrasive crushing is produced in pressure reduction and gas expanding volume is large so that gas-solid fly ash separation is difficult. Gas in the gas-solid mixture is discharged by a multistage decompressor under the control so that system reliability is greatly improved and continuous and stable reduction of gas-solid mixture pressure is realized. The technology has simple processes, adopts the equipment installed conveniently, has high reliability, can be operated continuously, and has safety, a low investment cost and a low operation cost.

Description

A kind of solids and gas mixture material reduce pressure continuously technique and system and equipment

Technical field

The present invention relates to a kind of solids and gas mixture material reduce pressure continuously technique and system and equipment.

Background technology

In recent years along with clean, energy-conservation, the Modern Coal-based Chemical technology high-speed development of environmental protection, coal gasification method becomes more diverse, gasification pressure raises day by day, the emission problem that reduces pressure the intermittence that after feed coal gasification, lime-ash discharges becomes increasingly conspicuous, because it controls complicated, Material control valve denudes and needs to adopt the series of problems such as transformation lock hopper, cause the investment of device to rise, reliability decrease, affect the annual continuous operating time of whole coal gasification apparatus, the present invention adopts the continuous decompression technology of classification to realize the continuous blow-down problem of pressurization lime-ash, do not establish lock hopper, in flow process, do not adopt wear-resisting by-pass valve control, for the safe long-term operation of coal gasification apparatus provides effective solution route.

The at present industrial intermittently ash discharge slag technology of lock hopper that all adopts, first close the lime-ash trip valve of lock hopper front and back, with rare gas element be lock hopper pressurising, in the time that lock hopper pressurising is consistent with high pressure cinder tank pressure, stop pressurising, then open lock hopper high-pressure chamber end lime-ash trip valve, high pressure lime-ash is put into lock hopper, then close the disconnected valve of lock hopper high-pressure chamber end-grain cutting lime-ash, by the pipeline of releasing to lock hopper exhaust decompression, in the time that pressure drop arrives low pressure cinder tank pressure, close bleed valve, open lock hopper low pressure storehouse end lime-ash trip valve material is entered to low pressure cinder tank.

Adopt this technique will consume a large amount of nitrogen into lock hopper pressurising, lime-ash trip valve repeatedly switch is easily denuded damage, secondly, lock hopper is a tired pressurized vessel that repeatedly fills pressure release, not only manufacture and design complexity, also have certain potential safety hazard, and this batch technology operation also having affected the efficiency of ash discharge slag, is a threat of current coal gasification apparatus safe and continuous long-term operation.

How to cancel lock hopper, it is that modern pressing gas technology is made great efforts one of problem solving that the step-down of high pressure batch lime-ash material discharge is changed into the continuous and stable discharge adapting with technical process always.

Summary of the invention

The object of the invention is in order to solve the problems of the technologies described above, to provide that a kind of technical process is simple, equipment is installed convenient, reliability is high, connectivity operation, essential safety, cost of investment and the low gas-solid mixture of running cost reduce pressure technique continuously.

The present invention also provides a kind of continuous pressure reducer for above-mentioned technique.

System of the present invention comprises multistage continuous pressure reducer and pressure detection composition of the control system.

Described pressure detection Controlling System is made up of the clean pipeline of the pressure detecting element (as tensimeter) on every grade of continuous pressure reducer, pressure releasing pipeline, initial start-up pressurising and the sweep gas variable valve that is arranged on the relieving pressure variable valve (or self-supporting regulation valve) on pressure releasing pipeline and is arranged on the clean pipeline of pressurising that is associated with pressure detecting element.

Described continuous pressure reducer is key core parts of the present invention, is made up of relief pipe, gas expansion chamber and pressure housing.The material of relief pipe adopts ventilative powder metallurgy metallic substance manufacture or ventilative silk screen sintering metallic substance manufacture or ventilative stupalith manufacture according to the different in kind of gas-solid material or by the inside and outside two-layer or in-built filter sand manufacture of multiple layer metal silk screen or tied up to manufacture or mixed to manufacture by above multiple material by multiple layer metal silk screen merely and form, gas expansion chamber is in the outside of relief pipe, for the cavity between housing and relief pipe, its volume is the twice of relief pipe volume.Pressure housing is the pressure-bearing protection housing of pressure reducer.

When the continuous depressurized system of gas-solid mixing material of the present invention is in running order, pressure reduction between high-pressure chamber and the low pressure storehouse of decompression as required, the working pressure of properly distributed pressure reducers at different levels, detect Controlling System control pressure reducer working pressure at the corresponding levels by every stage pressure stable, then open high-pressure chamber Material valve, can realize gas-solid mixing material and reduce pressure continuously.

[0013] brief description of the drawings

Fig. 1 is process flow sheet of the present invention and Controlling System structure iron.

Fig. 2 is the continuous pressure reducer structure iron of the present invention.

Wherein, 1-high pressure high pressure cinder tank, 2-high-pressure side lime-ash trip valve, 3-lime-ash pipeline, 4-pressure reducer, 5-pressure detection controller, 6-relieving pressure variable valve, variable valve is cleaned in 7-pressurising, 8-low pressure end lime-ash trip valve, 9-low pressure cinder tank, pipeline is cleaned in 10-pressurising, the expand pipeline of releasing of 11-, 12-high pressure lime-ash entrance, 13-pressure housing, 14-relief pipe, gas import is cleaned in 15-pressurising, 16-locates antivibrator, the outlet of 17-low pressure lime-ash, 18-expansion joint (by requirement of engineering setting), 19-expansion chamber, 20-pressure detecting element interface, 21-expansion bleeder pipe interface.

Claims

1. the continuous depressurized system of gas-solid mixing material, comprise pressure reducer and control loop composition thereof, it is characterized in that, multi-stage pressure reducers is connected in series, reach lime-ash step-down by the gaseous pressure of releasing, realize the continuously object of operation of material, relevant pressure reducer is by pressure control system that independently pressure instruction and variable valve or reducing valve form.

2. pressure reducer as claimed in claim 1, it is characterized in that, by puffing pipe and gas expansion spatial composing, puffing pipe forms by the powder metallurgy metallic substance of breathing freely, ventilative silk screen sintering metallic substance, ventilative stupalith or by the inside and outside two-layer or in-built filter sand of multi-layer silk screen, and its effect is to allow the gas expanding by allowing solid materials stay to greatest extent in puffing pipe.

3. reducer pressure Controlling System as relevant in claim 1 can be that every grade of pressure reducer independently arranges and also multi-stage pressure reducers pressure-controlling can be concentrated on to control and adjusting in one or several Controlling System, and these adjustings can be to be also independently correlated with.

4. the pressure before gas-solid mixing material decompression is not more than 10MPa as claimed in claim 1, and post-decompression pressure is any pressure that is not less than device location barometric point.

5. multi-stage pressure reducers comprises single-stage pressure reducing or two-stage tandem to ten grade series connection decompression as claimed in claim 1.

6. the available manual valve in the situation that operator is skilled of the variable valve in reducer pressure Controlling System substitutes as claimed in claim 1.