CN214064949U

CN214064949U - Flameless flash soot blower

Info

Publication number: CN214064949U
Application number: CN202022469100.2U
Authority: CN
Inventors: 胡建廷
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-08-27
Anticipated expiration: 2030-10-30

Abstract

The invention relates to a boiler soot blower, especially the flameless flash explosion soot blower used widely in the operation process of power station boiler, garbage incinerator, mainly include high-pressure generating circuit and gas flash explosion circuit; the main technical characteristics are that liquid is adopted to pressurize low-pressure compressed air again or carry out full-parameter pressure boost to non-pressure air, so that fireless flash explosion and ultrahigh pressure operation are realized, the potential safety hazard of inflammable and explosive is eliminated, and powerful guarantee is provided for improving the electric power safety production.

Description

Flameless flash soot blower

Technical Field

The invention relates to a soot blower for a boiler flue, in particular to a flameless flash explosion soot blower widely used in the operation process of various boilers at all levels, especially power station boilers.

Background

The existing soot blowers which are disclosed in the market or are arranged in a large number of boiler tail flues generally adopt a steam continuous soot blower, a sound wave soot blower and a shock wave soot blower, and the steam soot blower is easy to stick ash due to the fact that a sweeping medium contains a large amount of water vapor, the smoke discharge amount is greatly increased, and the heat loss of a boiler is increased; the acoustic soot blower uses low-pressure compressed air to generate mechanical vibration energy to hit floating soot, and the soot blowing effect is difficult to satisfy due to low pressure; the shock wave soot blower adopts pressure wave generated by deflagration of combustible gas, the pressure of the pressure wave soot blower reaches 0.1MP a, the soot blowing effect reaches expectation, and the shock wave soot blower is a mainstream product in the current market, but the shock wave soot blower has short continuous impact time and low pressure head, consumes a large amount of combustible and explosive gas, usually hydrogen, acetylene, methane, coal gas, liquefied petroleum gas and the like, and the bottled combustible gas is stored nearby a boiler for a long time and is really a great potential safety hazard, so that technical upgrading or product replacement is necessary.

Two fundamental problems to be solved by sootblowers are: one is the pressure problem of the purge medium; secondly, the problem of safe detonation.

Disclosure of Invention

The invention aims to solve the technical problem of providing a more advanced flameless flash-explosion soot blower aiming at the technical current situation.

The technical scheme adopted by the invention for solving the technical problems is that the flameless flash explosion soot blowing device comprises a high-pressure generator loop and a gas flash explosion loop; the high-pressure generator loop comprises a high-pressure generator body, a water pool, an air compressor, a pressurizing pump, a discharge pump, a control valve and the like, wherein isolation media are filled in the high-pressure generator body; the gas flash explosion loop comprises a high-pressure gas storage device, a flash explosion valve, a diffuser pipe, an electric control valve and the like, and is technically characterized in that the high-pressure gas storage device stores high-pressure gas generated by a high-pressure generator, the flash explosion valve is started under the control of the electric control valve, the high-pressure gas stored in the high-pressure gas storage device is discharged instantly, the high-pressure gas is distributed to each soot deposition surface through the diffuser pipe, attached dust is impacted, the purpose of soot blowing is achieved, and the gas pressure in the high-pressure gas storage device is the working pressure of the device.

Drawings

FIG. 1 is a system diagram of the flameless flash-explosion soot blower, and FIG. 2 is a sectional view of a flash-explosion valve of the flameless flash-explosion soot blower.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings:

the process principle and the structural principle of the invention are explained as follows:

referring to the attached

drawings

1 and 2, the flameless flash explosion soot blower comprises: a high pressure generator circuit and a gas flash circuit, wherein the key component in the flash circuit is a flash valve 4.

The high-voltage generator loop comprises: the device comprises an air compressor 1, a water tank 2, a high-pressure generator body 3, a discharge pump 7, a pressurizing pump 8, an isolation medium 9, a first electric control valve 10, a second electric control valve 11, a third electric control valve 12 and a fourth electric control valve 19.

The high-pressure generator body 3 is connected with an air compressor 1 through an electric control valve I10, a pressurizing pump 8 through an electric control valve II 11, a discharge pump 7 through an electric control valve IV 19 and the atmosphere through an electric control valve III 12; the inlet end of the pressurizing pump 8 is connected with the water pool 2; the outlet end of the drainage pump 7 is connected with the water tank 2; the bottom of the high-pressure generator body 3 is filled with an isolation medium 9, the density of the isolation medium 9 is less than that of water, and the isolation medium 9 mainly has the function of preventing the gas inside the high-pressure generator body 3 from being dissolved in water and simultaneously preventing the water-wet gas.

The outlet of the high-pressure generator body 3 is connected with a gas flash explosion loop.

The gas flash explosion loop comprises an electric control valve five 13 of a discharge loop I, a high-pressure gas reservoir I16, a flash explosion valve 4 and a diffuser pipe 6.

The gas flash explosion loop comprises an electric control valve six 14 of a discharge loop II, a high-pressure gas reservoir II 17, a flash explosion valve 4 and a diffuser pipe 6.

The gas flash explosion loop comprises an electric control valve seven 15 of a discharge loop III, a high-pressure gas reservoir III 18, a flash explosion valve 4 and a diffuser pipe 6.

The gas flash explosion loop also comprises an ash deposition surface 5 of a co-acting object of the gas flash explosion loop and the gas flash explosion loop.

The gas flash explosion circuit only provides three gas flash explosion discharge circuits, the number of the circuits can be set according to the field requirement in the actual implementation process, and the capacities of the high-pressure gas reservoirs can be different.

The working principle of the flash explosion valve 4 of the flameless flash explosion soot blower is described in detail with reference to the attached figure 2.

Fig. 2 is a schematic structural section view of the flash explosion valve 4, which comprises: valve body 20, intake pipe 21, valve seat 22, valve core 27, return spring 28, exhaust pipe 26, starting valve 24, etc.

The side of the valve body 20 of the flash valve 4 of the flameless flash soot blower is provided with an air inlet pipe 21, and the center is provided with a valve seat 22.

A valve core 27 is arranged in the valve seat 22 of the flash explosion valve 4 of the flameless flash explosion soot blower.

A valve core 27 of the flash valve 4 of the flameless flash soot blower is provided with a return spring 28.

The top of the valve seat 22 of the flash valve 4 of the flameless flash soot blower is provided with a discharge hole 31.

An exhaust pipe 26 is connected with the bottom outlet of the valve seat 22 of the flash valve 4 of the flameless flash soot blower.

An actuating valve 24 is arranged between the discharge hole 31 of the valve seat 22 of the flash explosion valve 4 of the flameless flash explosion soot blower and the outlet of the exhaust pipe 26 through a discharge pipe 23 and a discharge pipe 25.

An outflow side hole 33 is arranged on the bottom side of the valve seat 22 of the flash valve 4 of the flameless flash soot blower.

And a first sealing ring group 29 is arranged at the upper end of a valve core 27 of a flash valve 4 of the flameless flash soot blower.

And a second sealing ring group 30 is arranged at the bottom end of a valve core 27 of the flash valve 4 of the flameless flash-explosion soot blower.

The inner side part of the valve core 27 of the flash explosion valve 4 of the flameless flash explosion soot blower is provided with a flow guide hole 32 which is communicated up and down.

The vertical section of the valve core 27 of the flash explosion valve 4 of the flameless flash explosion soot blower is in an inverted cone shape.

The working process of the flash explosion valve 4 of the flameless flash explosion soot blower is as follows:

when the air inlet pipe 21 of the flash explosion valve 4 of the flameless flash explosion soot blower is connected with a pressurized air source, namely the high-pressure air reservoir I16, the high-pressure air reservoir II 17 and the high-pressure air reservoir III 18, the same pressure is instantly provided in the valve body 20, meanwhile, the air immediately enters the upper space of the valve seat 22 through the diversion hole 32 on the valve core 27, the pressure in the space is continuously increased due to the closing of the starting valve 24, the pressure is pressurized on the upper end surface of the valve core 27, and the bottom outlet of the valve seat 22 is sealed together with the return spring 28, so that the flash explosion valve 4 of the flameless flash explosion soot blower is in a pressurized self-locking state.

When the flash explosion operation is needed, the starting valve 24 is opened, a small amount of high-pressure gas in the valve seat 22 is directly discharged into the tail outlet of the exhaust pipe 26 through the discharge pipe 23, the starting valve 24 and the discharge pipe 25, and the gas cannot be supplemented in time because the flow of the flow guide hole 32 is small, the upper part of the valve core 27 loses pressure instantly, the bottom pressure is still at a high position, the lower end and the upper end of the valve core 27 have pressure difference, and the bottom pressure is greater than the upper pressure, so that the valve core 27 is quickly lifted up, a main gas flow channel is quickly opened, and the high-pressure gas enters the exhaust pipe 26 along the bottom outflow side hole 33 of the valve seat 22 and then enters the diffuser pipe 6 of the flameless flash explosion soot blower to complete flash explosion.

After the flash explosion is finished, the internal pressure of the valve body 20 is reset to zero, the starting valve 24 is closed quickly after being opened for a short time, the valve core 27 automatically falls under the combined action of the self gravity and the return spring 28, and automatic sealing is realized under the combined action of the first sealing ring group 29 and the second sealing ring group 30 and the valve seat 22 for the next starting process.

The overall working principle of the flameless flash explosion soot blower is as follows:

the overall working process of the flameless flash explosion soot blower can be divided into two steps:

the first step is as follows: generating high pressure gas

Because the output pressure head of the current common air compressor is common at 0.8MPa, the generation rate of the high-pressure gas is low, and the requirement of using a large amount of high-pressure gas is not met. For this purpose, we use indirect pressurization to obtain very high or ultra high pressure gas.

As shown in fig. 1, in the flameless flash explosion soot blower, a certain amount of isolation medium 9 is injected into a high-pressure generator body 3, then an electric control valve three 12 is closed, an electric control valve five 13, an electric control valve six 14 and an electric control valve seven 15 are opened, and then an air compressor 1 is opened and an electric control valve one 10 is opened. At this time, the pressure in the high-pressure generator body 3 starts to gradually rise until the pressure is equal to the rated outlet pressure of the air compressor 1, and then the first electric control valve 10 is closed to close the air compressor 1.

Meanwhile, the pressurizing pump 8 is started, the second electric control valve 11 is started, the pressurizing pump 8 sucks the liquid water in the water tank 2, and the rated outlet pressure of the pressurizing pump 8 is far greater than the rated design pressure of the air compressor 1, such as 4.0 MPa. Liquid water is injected into the high-pressure generator body 3, filling is started from the bottom of the high-pressure generator body 3, the isolation medium 9 is lifted, compressed air (or air) filled in the isolation medium is extruded, the internal pressure rises rapidly, and when the internal pressure is equal to the outlet pressure of the pressurizing pump 8, the electric control valve five 13, the electric control valve six 14 and the electric control valve seven 15 are closed firstly, then the electric control valve two 11 is closed, and the pressurizing pump 8 is closed; at this time, the high-pressure gas is prepared in the first high-pressure gas reservoir 16, the second high-pressure gas reservoir 17 and the third high-pressure gas reservoir 18 respectively, and the pressure of the first high-pressure gas reservoir 16, the second high-pressure gas reservoir 17 and the third high-pressure gas reservoir 18 is the same as the final pressure in the high-pressure generator body 3 of the flameless flash explosion soot blower.

After the high-pressure gas of the flameless flash explosion soot blower is prepared, the high-pressure generator body 3 of the flameless flash explosion soot blower is filled with liquid water, and then the liquid water needs to be discharged, wherein the water discharging method comprises the steps of opening a discharge pump 7, opening an electric control valve IV 19, and opening an electric control valve III 12 at proper time, the high-pressure generator body 3 of the flameless flash explosion soot blower is communicated with the atmosphere, the internal gas is gradually supplemented, and the liquid level is gradually reduced to the original position; the liquid water in the high-pressure generator body 3 of the flameless flash explosion soot blower returns to the pool 2.

When gas needs to be supplemented quickly, the third electric control valve 12 can be closed, then the first air compressor 1 and the first electric control valve 10 are opened, the high-pressure generator body 3 of the flameless flash explosion soot blower is quickly pressurized, and the liquid level in the high-pressure generator body is lowered faster by pulling the drain pump 7, and meanwhile, pre-pressurized gas, namely rated pressure gas of the air compressor 1, can be obtained.

Second step releasing high pressure gas

When a first high-pressure gas reservoir 16, a second high-pressure gas reservoir 17 and a third high-pressure gas reservoir 18 of the flameless flash explosion soot blower are charged to reach working pressure, the fifth electric control valve 13, the sixth electric control valve 14 and the seventh electric control valve 15 are closed, the flash explosion valve 4 is opened, high-pressure gas accumulated in the first high-pressure gas reservoir 16, the second high-pressure gas reservoir 17 and the third high-pressure gas reservoir 18 is ejected instantly and directly impacts the soot deposition surface 5 along the diffuser pipe 6, and after the shooting is finished, the flash explosion valve 4 can be automatically closed.

Therefore, the process is circularly repeated, and the working interval can be selected according to actual requirements to finish the dust cleaning work.

The benefits of this are:

first, flameless flash explosion soot blower, safe and reliable has solved the pressure head of bombardment gas and has crossed the problem of low excessively, when the export gas pressure head is higher, it is better to blow the ash effect, has just so prolonged and has blown the operation interval, has more guaranteed the reliability of this device. Originally, combustible gas is adopted for blasting, and because the density of the combustible gas is extremely low, the specific volume is large, the filling amount is very limited, and the energy density is extremely low, the pressure after ignition is not too high and is all lower than 1.0MPa, the improvement is very difficult, so that the volume of soot blowing equipment is reduced, the installation quantity is reduced, the equipment investment is reduced, and the field installation and arrangement quantity is very large.

The flameless flash explosion soot blower adopts the principle of liquid pressurized air to increase the pressure of low-grade compressed air (normal pressure air) to the output pressure of the liquid pump, and the pressure of the liquid pump far exceeds the output pressure of the conventional air compressor.

Thirdly, the flameless flash explosion soot blower adopts a method of pressurizing gas pressure by liquid, combustible gas is not used, a gas bottle does not need to be stored on site, a dangerous source is reduced, and the power generation is safer.

And fourthly, the flameless flash explosion soot blower does not use combustible gas in the whole working process, does not have a combustion process, and does not generate flame and spray flame, so that the flameless flash explosion soot blower is flameless and does not have a system unsafe factor of backfire.

Fifthly, the flameless flash explosion soot blower is characterized in that a water cooling tower of a power plant can be used as the water pool 2, which is generally standard and matched with the power plant, and when the boiler is started facing large-scale plasma ignition, the soot blowing of a steam boiler can be replaced by the high-power compressed air soot blowing of a tail heating surface (such as an air preheater).

Claims

1. The flameless flash explosion soot blowing device comprises a high-pressure generator loop and a gas flash explosion loop, and is technically characterized in that the high-pressure generator loop comprises an air compressor (1), a water pool (2), a high-pressure generator body (3), a discharge pump (7), a pressurizing pump (8) and an isolating medium (9), wherein the high-pressure generator body (3) is simultaneously connected with the air compressor (1), the pressurizing pump (8) and the discharge pump (7) and is controlled to be communicated with the atmosphere; the bottom of the high-pressure generator body (3) is filled with an isolation medium (9), and the density of the isolation medium (9) is less than that of water; the outlet of the high-pressure generator body (3) is connected with a gas flash explosion loop; the gas flash explosion loop comprises an electric control valve V (13) of a discharge loop I, a high-pressure gas reservoir I (16), a flash explosion valve (4) and a diffuser pipe (6); the gas flash explosion loop comprises an electric control valve six (14) of a discharge loop II, a high-pressure gas reservoir II (17), a flash explosion valve (4) and a diffuser pipe (6); the gas flash explosion loop comprises an electric control valve seven (15) of a discharge loop III, a high-pressure gas reservoir III (18), a flash explosion valve (4) and a diffuser pipe (6); the gas flash explosion loop comprises a dust deposition surface (5) of a mutual acting object of the gas flash explosion loop and the dust deposition surface.