CN215808575U - Boiler flue soot blowing system - Google Patents

Abstract

A boiler flue soot blowing system comprises a fluidized bed incinerator and a soot blowing system, wherein the fluidized bed incinerator comprises an air chamber, a sand bed, a combustion chamber, a waste gas pipeline and a heat recovery system, the sand bed is arranged above the air chamber, the bottom of the combustion chamber is connected with the sand bed, the top of the combustion chamber is connected with one end of the waste gas pipeline, the other end of the waste gas pipeline is connected with the heat recovery system, the soot blowing system comprises a pulse tank, a soot blowing pipeline, a gate valve and an air curtain, the pulse tank is connected with the waste gas pipeline through the soot blowing pipeline, the gate valve is arranged on the pipeline connected with the pulse tank and the waste gas pipeline, the air curtain is arranged at the joint of the pulse tank and the waste gas pipeline, the pulse tank is additionally arranged in the system, the interface of the pulse tank is connected to the turning part connected with the waste gas pipeline and a boiler, the soot accumulation condition is effectively controlled, the air curtain is arranged at the joint of the pulse tank, and the flue gas is effectively prevented from entering the pipeline of the pulse tank, thereby causing the phenomenon that the efficiency of the pulse tank is reduced until the work is effective.

Description

Boiler flue soot blowing system

Technical Field

The utility model relates to the technical field of boiler flue soot blowing, in particular to a boiler flue soot blowing system.

Background

When the boiler burns sludge, a large amount of fly ash can be generated, the fly ash is easy to accumulate at the turning part of the waste gas pipeline, the efficiency of the boiler is reduced, the ash accumulation condition needs to be cleaned and solved regularly, the shutdown of the boiler is caused, and the working efficiency of the boiler is influenced.

When the flue gas passes through the interface of the pulse tank, the flue gas pressure fluctuates or the flue gas per se disturbs to enable the flue gas to enter the pulse tank. The smoke forms condensation on the surface of the tank body, and fine ash particles in the smoke are bonded on the surface of the tank body, so that the phenomena of ash deposition on the inner wall of the tank body, nozzle blockage and the like are caused, and the pulse tank fails to work.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the utility model relates to a boiler flue soot blowing system, wherein a pulse tank is additionally arranged in the system, an interface of the pulse tank is connected to a turning part where a waste gas pipeline is connected with a boiler, so that the soot deposition condition is effectively controlled, and an air curtain is arranged at the interface of the pulse tank, so that the phenomenon that the efficiency of the pulse tank is reduced until the work is effective is effectively prevented.

The utility model relates to a boiler flue soot blowing system, which comprises a fluidized bed incinerator and a soot blowing system, wherein the fluidized bed incinerator comprises an air chamber, a sand bed, a combustion chamber, a waste gas pipeline and a heat recovery system, the sand bed is arranged above the air chamber, the bottom of the combustion chamber is connected with the sand bed, the top of the combustion chamber is connected with one end of the waste gas pipeline, the other end of the waste gas pipeline is connected with the heat recovery system, the soot blowing system comprises a pulse tank, a soot blowing pipeline, a gate valve and an air curtain, the pulse tank is connected with the waste gas pipeline through the soot blowing pipeline, the gate valve is arranged on the pipeline connecting the pulse tank with the waste gas pipeline, and the air curtain is arranged at the joint of the pulse tank and the waste gas pipeline.

By adopting the scheme, the phenomenon of dust deposition in the waste gas pipeline is reduced, and the gate valve is convenient for controlling the ejection condition of the pulse tank airflow.

Furthermore, the soot blowing pipeline is provided with a fork, and the fork divides the soot blowing pipeline into a first channel and a second channel.

By adopting the scheme, the working state of the pulse tank can be conveniently controlled.

Further, the first passage communicates with the exhaust gas duct at a junction of the exhaust gas duct and the combustion chamber, and the second passage communicates with the exhaust gas duct at a bottom flush position of the exhaust gas duct.

By adopting the scheme, the dust deposit at the joint of the waste gas pipeline and the combustion chamber and the waste gas pipeline is cleaned.

Further, the first channel and the second channel are both connected with a gate valve.

Further, the gate valve is divided into a first gate valve and a second gate valve, the first gate valve is arranged on the first channel, and the second gate valve is arranged on the second channel.

Through adopting above-mentioned scheme, the gate valve is convenient for control first passageway and the condition of ventilating of second passageway.

Furthermore, air curtains are arranged at the joints of the first channel, the second channel and the waste gas pipeline.

Through adopting above-mentioned scheme, the air curtain prevents that the flying dust from entering the pulse jar along with the pipeline, causes the efficiency of pulse jar to reduce or even become invalid.

Further, the gate valve is an electric gate valve.

By adopting the scheme, the automatic control is convenient.

Furthermore, the heat recovery system comprises a flowing cavity and a heat exchange device, wherein the flowing cavity is provided with a first interface and a second interface, the first interface is positioned above the second interface, the first interface is communicated with the air chamber, and the second interface is connected with a fan.

By adopting the scheme, the heat circulation system is additionally arranged, and the sludge incineration efficiency is accelerated.

Further, the fan is a high-pressure fan.

By adopting the scheme, the downstream suction force is increased, and the influence of accumulated dust is reduced.

Further, the pulse tank is provided with a controller, and the first gate valve and the second gate valve are electrically connected with the controller.

Through adopting above-mentioned scheme, according to the automatic switch of control gate valve of demand.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Reference numerals: 1. an air chamber; 2. a sand bed; 3. a combustion chamber; 4. an exhaust gas conduit; 5. a flow cavity; 51. a first interface; 52. a second interface; 53. a fan; 6. a heat exchange device; 7. a pulse tank; 71. a controller; 72. a soot blowing pipeline; 73. a first channel; 731. a first gate valve; 74. a second channel; 741. a second gate valve; 8. an air curtain.

Detailed Description

While the embodiments of the present invention will be described and illustrated in detail with reference to the accompanying drawings, it is to be understood that the utility model is not limited to the specific embodiments disclosed, but is intended to cover various modifications, equivalents, and alternatives falling within the scope of the utility model as defined by the appended claims.

For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking specific embodiments as examples with reference to the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.

The embodiment 1 of the utility model is shown by referring to fig. 1, and relates to a soot blowing system of a boiler flue, which comprises a fluidized bed incinerator and a soot blowing system, wherein the fluidized bed incinerator comprises an air chamber 1, a sand bed 2, a combustion chamber 3, a waste gas pipeline 4 and a heat recovery system, the sand bed 2 is arranged above the air chamber 1, the bottom of the combustion chamber 3 is connected with the sand bed 2, the top of the combustion chamber 3 is connected with one end of the waste gas pipeline 4, the other end of the waste gas pipeline 4 is connected with the heat recovery system, two sides of the sand bed 2 are respectively provided with a fuel gas feeding port and a sludge feeding hole, the heat recovery system comprises a flowing cavity 5 and a heat exchange device 6, the flowing cavity 5 is provided with a first interface 51 and a second interface 52, the first interface 51 is positioned above the second interface 52, the first interface 51 is communicated with the air chamber 1, hot air flowing out from the waste gas pipeline 4 is guided into the air chamber 1 through the first interface 51, reduce the work load of 3 heated air in combustion chamber, improve work efficiency, second interface 52 is connected with fan 53, first interface 51 all is equipped with air curtain 8 with second interface 52, prevents that the flying dust from getting into the boiler once more and directly discharging to the atmosphere through fan 53 and cause pollution and fan 53's damage, heat exchange device 6 end is equipped with the flue gas and handles the mouth, discharges into the atmosphere after discharging the flue gas into the low reaches and purifying.

The soot blowing system comprises a pulse tank 7, a soot blowing pipeline 72 and a gate valve, wherein the pulse tank 7 is connected with the waste gas pipeline 4 through the soot blowing pipeline 72, the gate valve is arranged on a pipeline connecting the pulse tank 7 and the waste gas pipeline 4, and the air curtain 8 is arranged at the connecting part of the pulse tank 7 and the waste gas pipeline 4.

The sootblowing duct 72 is provided with a bifurcation that divides the sootblowing duct 72 into a first channel 73 and a second channel 74. The first channel 73 communicates with the exhaust gas duct 4 at the junction of the exhaust gas duct 4 with the combustion chamber 3, and the second channel 74 communicates with the exhaust gas duct 4 at the bottom level of the exhaust gas duct 4. The first passage 73 and the second passage 74 are connected to a gate valve. The gate valve is divided into a first gate valve 731 and a second gate valve 741, the first gate valve 731 is disposed on the first channel 73, and the second gate valve 741 is disposed on the second channel 74. The gate valve is an electric gate valve. The pulse tank 7 is provided with a controller 71, the first gate valve 731 and the second gate valve 741 are electrically connected to the controller 71, and the controller 71 controls the first gate valve 731 and the second gate valve 741 to open and close, so that the location where soot is blown heavily can be adjusted according to the requirement, and the soot blowing efficiency can be improved. The air curtain 8 is arranged at the joint of the first channel 73, the second channel 74 and the waste gas pipeline 4.

The fan 53 is a high-pressure fan 53, so that the suction force of the fan 53 is increased, the circulating speed is accelerated, and the dust deposition phenomenon is reduced.

The utility model brings economic benefits to production:

the internal resistance of the whole system is reduced, the operation energy consumption of the boiler is effectively reduced, the through flow is good, and the abrasion loss of the tube bundle is effectively reduced; the increment of the exhaust gas temperature is reduced, the heat loss is reduced, and the stable boiler efficiency is effectively ensured.

According to the condition of the prior art, the operation period of the boiler is once stopped from the original 3-4 months, and is prolonged to once stopped in 6 months. The time for cleaning the ash in the flue is shortened to 4 days from the original 7 days for cleaning the ash in each blowing-out. The annual running time can be increased by 18 days according to 15 days of each furnace shutdown maintenance. According to the calculation of 30 tons of boiler hourly evaporation capacity and 4.5 kg/kW.h of steam consumption rate of a steam turbine in the prior art, the generated energy is increased: 30000/4.5 is 6666 kW.h, and the power generation capacity can be increased all the year round: 18 × 24 × 6666 ═ 2879712kW · h, converted to electricity charge: 2879712 × 0.65 equals 187 ten thousand yuan. Meanwhile, the annual sludge treatment amount is increased to 18 x 600-10800 tons.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a boiler flue blows grey system, includes that fluidized bed burns burning furnace and soot blowing system, fluidized bed burns burning furnace and includes plenum, sand bed, combustion chamber, exhaust duct and heat recovery system, the plenum top is located to the sand bed, the combustion chamber bottom is connected with the sand bed, exhaust duct one end is connected at the combustion chamber top, the exhaust duct other end is connected with heat recovery system, its characterized in that: the soot blowing system comprises a pulse tank, a soot blowing pipeline and a gate valve, wherein the pulse tank is connected with a waste gas pipeline through the soot blowing pipeline, the gate valve is arranged on the pipeline connected with the pulse tank and the waste gas pipeline, and an air curtain is arranged at the joint of the pulse tank and the waste gas pipeline.

2. A boiler flue sootblowing system as recited in claim 1, wherein: the soot blowing pipeline is provided with a fork, and the fork divides the soot blowing pipeline into a first channel and a second channel.

3. A boiler flue sootblowing system as recited in claim 2, wherein: the first channel is communicated with the waste gas pipeline at the joint of the waste gas pipeline and the combustion chamber, and the second channel is communicated with the waste gas pipeline at the bottom flush position of the waste gas pipeline.

4. A boiler flue sootblowing system as recited in claim 3, wherein: the first channel and the second channel are both connected with a gate valve.

5. A boiler flue sootblowing system as recited in claim 4, wherein: the gate valve divide into first gate valve and second gate valve, first gate valve is located on the first passageway, the second gate valve is located on the second passageway.

6. A boiler flue sootblowing system as recited in claim 5, wherein: and air curtains are arranged at the joints of the first channel, the second channel and the waste gas pipeline.

7. A boiler flue sootblowing system as recited in claim 6, wherein: the gate valve is an electric gate valve.

8. A boiler flue sootblowing system as recited in claim 1, wherein: the heat recovery system comprises a flowing cavity and a heat exchange device, wherein the flowing cavity is provided with a first interface and a second interface, the first interface is positioned above the second interface, the first interface is communicated with the air chamber, and the second interface is connected with a fan.

9. A boiler flue sootblowing system as recited in claim 8, wherein: the fan is a high-pressure fan.

10. A boiler flue sootblowing system as recited in claim 7, wherein: the pulse jar is equipped with the controller, first gate valve and second gate valve and controller electric connection.

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