CN103307614A

CN103307614A - Modulated pulse soot blowing method and device

Info

Publication number: CN103307614A
Application number: CN2012100556278A
Authority: CN
Inventors: 周慧民
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-06
Filing date: 2012-03-06
Publication date: 2013-09-18

Abstract

The invention discloses a modulated pulse soot blowing method, which comprises the following steps of filling compressed air in a device; introducing water into the device; instantly releasing the compressed air in the device, and making the water and air in the device spray out; and repeating the process to form a water-containing pulse impact wave at the outlet of the device, and blowing soot of a boiler by using the impact wave. The invention also discloses a pulse soot blowing device for implementing the method. The device consists of a valve, an air pipeline and metering delivery distributor, a water supply pipeline and metering delivery distributor, a shock wave generator, a water inlet pipe, an inlet valve and an electric control device. The device does not require gas, is safe, energy-saving and environment-friendly, and is simple in equipment structure, wide in application range, convenient to operate and long in service life.

Description

Modified pulse ash-blowing method and device

Technical field

The present invention relates to the boiler soot-blowing technology, specially refer to a kind of modified pulse ash-blowing method and device.

Background technology

For a long time, the grey problem of blowing of boiler heating surface is one of problem that receives publicity especially in the boiler running process always.For many years, people are in order to have adopted many grey ways of blowing in the situation that not blowing out is blown ash to heating surface: blow ash, steam soot blowing, hydraulic(-ash) sluicing, compressed air soot-blowing, sonic soot blowing and fuel gas pulse ash blower etc. such as little steel ball.Yet in practical process, these methods all exist some problems to some extent.Particularly for some hard ashes and just more difficult blowing of slagging scorification, the Chinese patent that on October 26th, 2011 was announced: ZL 200910072139.6 " a kind of boiler pulse soot-blowing method and device " has solved this problem well, that is to say that this new technology can blow down loose dust stratification, hard ash and high-adhesion dust stratification and slagging scorification etc.But this technology also has certain limitation, and its working media has fuel gas, and is inflammable and explosive, can't work in the high temperature section of boiler.The present invention proposes a kind of novel modified pulse ash-blowing method and device for such problem.

The background technology of above-mentioned relevant boiler soot-blowing has a detailed description in following monograph:

1, " dust stratification of boiler and heat exchanger, slagging scorification, abrasion and corrosion prevent principle and calculating ", Cen Kefa, Fan Jianren, Chi Zuohe, Shen Luochan work, Science Press (1994).

2, " Principles of Boiler ", Xi'an Communications University, Chen Xunjun, Chen Tingkuan chief editor, China Machine Press (1979).

3,200910072139.6 1 kinds of boiler pulse soot-blowing methods of ZL and device.

Summary of the invention

The objective of the invention is to provide a kind of both effective to various dust stratifications and slagging scorification and the hard dust stratification of high-adhesion, can guarantee again safe and reliable, can be applied to ash-blowing method and the device at each position of boiler, require its method practical, safe and reliable, equipment is simple, applied range, operating maintenance is convenient, long service life.

In order to achieve the above object, the present invention has given a kind of modified pulse ash-blowing method, the first step is charged into compressed air in the device, second step discharges water in device, the 3rd goes on foot the rapidly interior compressed air of releasing device, and the empty G﹠W of the 4th step by ejection in the device forms powerful shock wave, the process in the 5th step repetition four steps of the first step to the, go out interruption-forming with the pulse high speed impact ripple of water at device, utilized this pulse shock to remove dust stratification on boiler heating surface.Because added water, all change so that blow quality and the density of grey working medium, also can change on the other hand the temperature of dust stratification and periphery, modified mechanism that Here it is.Because modified function so that on the heating surface pipe slagging scorification and high-adhesion coking be subject to sudden cold fragmentation, the dust stratification after breaking is on the other hand easily thoroughly removed under the strong shock wave effect.

In order to implement said method, the present invention has provided a kind of modified impulse ash blower, it is by valve, supply air line and metering dispenser, shock wave generator, supply channel and metering dispenser, water inlet pipe, water intaking valve and electric control gear form, shock wave generator is by tank body, quick action valve is connected pipe fitting to connect and is formed with nozzle, supply air line and metering dispenser, valve, link to each other with the air inlet (hereinafter to be referred as air inlet) of shock wave generator, supply channel and metering dispenser and water intaking valve, water inlet pipe links to each other, water inlet pipe puts in the nozzle, the termination of water inlet pipe has one or more hole for water sprayings, nozzle is connected with blind flange with flange, the nozzle inner surface can make various shapes, for example: convergent, gradually put, light pipe and their combination, quick action valve is by adapter, single-phase valve, cylinder, piston and blind flange form, check valve is installed in the adapter, cylinder is comprised of two parts: a part is that operate portions engages with piston, can slide between them, another part is supporting leg, supporting leg is fixed on the blind flange, cylinder operation section one end has air admission hole, link to each other with the gas outlet of taking over on the impulse generator shell (hereinafter to be referred as shell), communicate with supply air line, shell and cylinder, the pressure chamber that blind flange surrounds communicates with tank body, blind flange central authorities journey boss shape, and having venthole, quick action valve can be installed in tank body and also can be installed in the tank body outward.

Advantage of the present invention is:

1, used working medium is empty G﹠W, does not have combustion gas, and safety is energy-conservation, environmental protection.

2, adopt double-work medium, blow grey strength strong, modified function makes dust stratification, slagging scorification loose, blows ash effective.

Description of drawings

Fig. 1 is the system diagram of a kind of modified impulse ash blower of the present invention.

Fig. 2 is the structure of shock wave generator in a kind of modified impulse ash blower of the present invention

Among Fig. 1,1 shock wave generator, 2 tank body 3 quick action valves, 4 nozzle 5 triple valves, 6 water inlet pipe 7 water intaking valves, 8 supply channels and metering dispenser 9 valves, 10 supply air lines and metering dispenser 11 electric control gears

Among Fig. 2,12 cylinders, 13 air admission holes, 14 pistons, 15 blind flanges, 16 ventholes, 17 pressure chambers, 18 check valves 19 are taken over 20 air inlets, 21 cylinder chambers

The specific embodiment:

Below in conjunction with drawings and Examples invention is further described.

Referring to two figure, method of the present invention, the first step is opened valve 9 and air pipe line and metering dispenser 10, triple valve 5, be in air-suction state, compressed air enters in the quick action valve 3 in the shock wave generator 1 by air inlet 20, under compressed-air actuated driving, piston 14 in the quick action valve 3, press to the venthole 16 on the blind flange 15, make shell (hereinafter to be referred as shell) and cylinder 12 by impulse generator 1, the pressure chamber 17 that blind flange 15 surrounds and the tank body 2 journey air-tight states that are communicated with, compressed air enters in the tank body 2 of pressure chamber 17 and connection by the check valve 18 of taking on 19, second step makes supply channel and metering dispenser 8 and water intaking valve 7 be in opening state, water is entered in the nozzle 4, the 3rd step valve-off 9 and water intaking valve 7, crossover tee valve 5, be in to the atmospheric exhaust state, being directed at the cylinder chamber 21 that is surrounded by cylinder 12 and piston 14 communicates with atmosphere, make cylinder chamber 21 pressure releases, piston 14 leaves venthole 16 rapidly under differential pressure action, compressed air moment in pressure chamber 17 and the tank body 2 goes out venthole 16 and enters nozzle 4, the empty G﹠W of the 4th step nozzle 4 ejections forms powerful shock wave, the 5th step repeated the first step to the process in four steps, had just formed the pulse high speed impact ripple with water in the exit.

Referring to two figure, in order to implement said method, the present invention has provided a kind of modified impulse ash blower, it is by valve 9, supply air line and metering dispenser 10, shock wave generator 1, supply channel and metering dispenser 8, water inlet pipe 6, water intaking valve 7 and electric control gear 11 form, shock wave generator 1 is by tank body 2, quick action valve 3 is connected with the pipe fitting connection and is formed with nozzle, supply air line and metering dispenser 10, valve 9 links to each other with the air inlet 20 of shock wave generator 1, supply channel and metering dispenser 8 and water intaking valve 7, water inlet pipe 6 links to each other, water inlet pipe 6 puts in the nozzle 4, the termination of water inlet pipe 6 has one or more hole for water sprayings, nozzle 4 usefulness flanges are connected with blind flange 15, nozzle 4 inner surfaces can make various shapes, for example Fig. 1 represents among the embodiment, the inner surface of nozzle 4 is combinations of convergent and light pipe, Fig. 2 represents that inner surface is light pipe among another embodiment, quick action valve 3 is by taking over 19, single-phase valve 18, cylinder 12, piston 14 and blind flange 15 form, check valve 18 is installed in to be taken on 19, cylinder is comprised of two parts: a part is that operate portions engages with piston 14, can slide between them, another part is supporting leg, supporting leg is fixed on the blind flange 15, cylinder 12 operate portions one end has air admission hole 13, link to each other with air inlet 20 on the shell with taking over 19, communicate with supply air line, shell and cylinder 12, the pressure chamber 17 that blind flange 15 surrounds communicates with tank body 2, blind flange 15 central journey boss shapes, and have a venthole 16, quick action valve 3 can be installed in tank body 2 outer also can being installed in the tank body 2, and electric cabinet 11 follow procedures are controlled each position and carried out work.

Claims

1. modified pulse ash-blowing method: the first step is charged into compressed air in the device, second step is the interior compressed air of releasing device rapidly, the 3rd step repeated the first step to the process of second step, the 4th step just produced pulse shock in outlet, it is characterized in that: to the device in be filled with compressed air after, discharge water in device, the pulse shock air-flow by the device ejection contains water at last again.

2. the modified impulse ash blower of a realization such as modified pulse ash-blowing method that claim 1 is told, formed by valve, supply air line and metering dispenser, shock wave generator, supply channel and metering dispenser, water inlet pipe, water intaking valve, shock wave generator is by tank body, quick action valve and nozzle form, supply air line and metering dispenser and valve link to each other with the air inlet of impulse generator, it is characterized in that: supply channel and metering dispenser link to each other with water intaking valve, water inlet pipe, water inlet pipe stretches in the nozzle, and the termination of water inlet pipe has one or more hole for water sprayings.

3. by a kind of modified impulse ash blower claimed in claim 2, quick action valve is comprised of adapter, check valve, cylinder, piston, blind flange, it is characterized in that: check valve is installed in the adapter, cylinder is comprised of two parts: a part is that operate portions engages with piston, can slide between them, another part is supporting leg, supporting leg is fixed on the blind flange, cylinder operation section one end has air admission hole, link to each other with the gas outlet of taking over on the shell, communicate with supply air line, blind flange central authorities journey boss shape, and have venthole.

4. by a kind of modified impulse ash blower claimed in claim 2, it is characterized in that, quick action valve can be installed in the tank body and also can be installed in outside the tank body.

5. a kind of modified impulse ash blower of telling by claim 2 is characterized in that: the nozzle inner surface can make various shapes, for example: convergent, gradually put, light pipe or their combination.