CN211316217U - Gas pulse soot blower using venturi to mix acetylene and air - Google Patents
Gas pulse soot blower using venturi to mix acetylene and air Download PDFInfo
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- CN211316217U CN211316217U CN201922149750.6U CN201922149750U CN211316217U CN 211316217 U CN211316217 U CN 211316217U CN 201922149750 U CN201922149750 U CN 201922149750U CN 211316217 U CN211316217 U CN 211316217U
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Abstract
The utility model discloses an utilize gas pulse soot blower of mixed acetylene of venturi and air, including air gas cylinder, acetylene gas cylinder, valve, flowmeter, connecting tube, venturi and soot blowing jar, venturi includes entrance, convergent section, throat, flaring section, export section and draws the jet orifice, and soot blowing jar includes admission valve, combustion chamber, some firearm, spout section and end cover, and the spout section of soot blowing jar includes magnet piece, magnet hole and connecting axle. Air and acetylene gas are fully mixed through a venturi tube and enter a soot blowing tank for combustion and explosion, and generated high-temperature and high-pressure flue gas pushes a right end cover of the soot blowing tank to be opened and rushes to a soot blowing part to realize a soot blowing effect. The opening of the valves of different gas cylinders is adjusted, the flow of acetylene and air can be adjusted, and the mixing ratio of the gases is changed. The utility model discloses can realize air and acetylene gas proportional intensive mixing, the end cover of blowing the ash can export can realize the sealing of defeated gas stage blowing ash can before the ignition with the cooperation of magnet.
Description
Technical Field
The utility model relates to a gas mixes the burning field in advance, especially relates to an utilize gas pulse soot blower of mixed acetylene of venturi and air.
Background
The gas pulse soot blower is a new generation soot blowing technology with advanced performance, excellent effect, reliable operation and simple operation and maintenance, and utilizes common combustible gas such as acetylene and the like and air to mix and burn and blow soot according to a certain proportion. Different from the conventional combustion process, the mixed gas in the gas pulse soot blower is rapidly combusted and exploded to generate high-temperature and high-pressure flue gas, and the high-temperature and high-pressure flue gas is sprayed out from a nozzle of an output pipe and acts on a heating surface to further enable accumulated soot to fall off.
The Venturi tube has a simple structure and low manufacturing and maintenance cost, and is widely applied to various fields of production, life and the like, such as flow measurement, gas mixing, liquid impurity removal and the like. The premixing of two kinds of gas of acetylene and air need be realized to the pulse soot blower before the explosion of burning, and traditional gas pulse soot blower is sent into the blender respectively with two kinds of gas, mixes again, and the mixing effect is not good, and the device is complicated moreover. Therefore, a gas pulse sootblower using venturi mixing acetylene and air becomes one of the technical keys in the field.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides an utilize gas pulse soot blower of mixed acetylene of venturi and air, can realize air and acetylene gas proportional intensive mixing, from blowing ash can export outflow before preventing the gas mixture combustion explosion.
In order to solve the technical problem, the utility model discloses a technical scheme be:
a gas pulse soot blower using Venturi to mix acetylene and air comprises an air cylinder a1, an acetylene cylinder b2, a valve a3, a valve b4, a flow meter a5, a flow meter b6, a connecting pipeline a7, a connecting pipeline b8, a venturi tube 9, a connecting pipeline c10 and a soot blowing tank 11.
The air cylinder a1, the valve a3, the flowmeter a5, the connecting pipeline a7 and the inlet section 91 of the venturi tube 9 are sequentially connected through flanges to form an air pipeline; the acetylene gas cylinder b2, the valve b4, the flowmeter b6, the connecting pipeline b8 and the injection hole 96 of the venturi tube 9 are sequentially connected through flanges to form an acetylene gas pipeline; the outlet section 95 of the venturi tube 9, the connecting pipe c10 and the air inlet valve 111 of the soot blowing tank 11 are connected in sequence through flanges to form a conveying pipeline of air-acetylene mixed gas.
The venturi tube 9 comprises an inlet section 91, a tapered section 92, a throat 93, a divergent section 94, an outlet section 95 and an injection hole 96, wherein the tapered angle of the tapered section 92 is 16 degrees, and the divergent angle of the divergent section 94 is 7 degrees; the throat 93 has a circular section, an inner diameter of 18mm and a length of 30 mm; the cross-section of the injection hole 96 is circular, the inner diameter is 10mm, and the outer diameter is 12 mm.
The ash blowing tank 11 comprises an air inlet valve 111, a combustion chamber 112, an igniter 113, a nozzle section 114 and an end cover 115; the nozzle section 114 comprises a magnet block a1141, a magnet hole a1142, a connecting shaft 1143, a magnet hole b1144 and a magnet block b1145, wherein the magnet block a1141 is a cuboid with a length of 20mm, a width of 8mm and a height of 4mm, the magnet block b1145 is a semicircular arch, the inner diameter of the magnet block is 44mm, and the outer diameter of the magnet block b is 46 mm; end cap 115 includes a sleeve 1151 and a cover 1152, and end cap 115 is made of a ferrous material.
The nozzle section 114 of the ash blowing tank 11 is provided with a connecting shaft 1143, the end cover 115 is provided with a shaft sleeve 1151, and the shaft sleeve 1151 is matched with the connecting shaft 1143.
The gas pulse soot blower adopts the pipeline arrangement and the valve regulation mode, the pressure of an air source is required to be 0.25-0.60 MPa, the pressure of an acetylene source is required to be 0.10-0.15 MPa, and the air-acetylene mixing ratio in the explosion soot blowing process is 11.5-12.6. If other air-acetylene mixing ratios are required, it is necessary to change the structural parameters of the system and in particular of the venturi tube 9, and therefore, exceeding the above mentioned air-acetylene mixing ratios is not within the scope of protection of the present patent. Simultaneously, venturi 9's external diameter and connecting tube, valve, flowmeter can be confirmed according to the site conditions, and this patent does not require, also is not at this patent's protection scope.
During the soot blowing process, the flow rates of air and acetylene are determined according to the required explosion energy, and are detected by a flow meter a5 and a flow meter b 6. When the gas pulse sootblower sootblows soot, the air inlet valve 111 of the soot blowing tank 11, the valve a3 of the air cylinder a1, and the valve b4 of the acetylene cylinder b2 are opened in sequence, and all are in a fully open state. The adjustment valve a3 observes the reading of the flowmeter a5 and reaches a determined value, then the adjustment valve b4 observes the reading of the flowmeter b6 and reaches a determined value, then the air inlet valve 111 of the soot blowing tank 11 is closed, the valve b4 of the acetylene gas cylinder b2 and the valve a3 of the air gas cylinder a1 are sequentially closed, the igniter 113 is started to ignite, and the explosion soot blowing in the hearth is carried out; after soot blowing is stopped, the air inlet valve 111 of the soot blowing tank 11 and the end cover 115 at the right end of the soot blowing tank 11 are closed, so that the end cover 115 is attached to the right end of the nozzle section 114.
The utility model has the advantages that:
compared with the conventional soot blower in which gas and air are directly input into a combustion chamber for combustion, explosion and soot blowing, the gas pulse soot blower utilizing venturi mixing acetylene and air can realize the full premixing of two gases in proportion, thereby improving the effect of combustion and explosion; high-temperature and high-pressure flue gas generated by combustion and explosion is used for pushing the end cover adsorbed by the magnet to be opened, so that gas leakage before explosion ignition when gas is input is prevented.
Drawings
FIG. 1 is a front three-dimensional view of a gas pulse sootblower utilizing a venturi to mix acetylene and air in accordance with the present invention;
FIG. 2 is a three-dimensional view of a venturi of a gas pulse sootblower utilizing a venturi to mix acetylene and air;
FIG. 3 is a cross-sectional view of a venturi tube of a gas pulse sootblower using a venturi to mix acetylene and air;
FIG. 4 is a sectional view of a venturi tube of a gas pulse sootblower using a venturi to mix acetylene and air according to the present invention;
FIG. 5 is a three-dimensional view of a soot blowing canister of a gas pulse soot blower utilizing a venturi to mix acetylene and air in accordance with the present invention;
FIG. 6 is a three-dimensional view of the outlet section of a soot blowing tank of a gas pulse soot blower utilizing a venturi to mix acetylene and air in accordance with the present invention;
FIG. 7 is a three-dimensional view of an end cap of a soot blowing canister of a gas pulse soot blower utilizing a venturi to mix acetylene and air in accordance with the present invention;
FIG. 8 is a three-dimensional view of the closed end cap of the outlet section of a soot blowing tank of a gas pulse soot blower utilizing a venturi to mix acetylene and air in accordance with the present invention;
fig. 9 is a three-dimensional view of the open state of the outlet section end cap of the soot blowing tank of the gas pulse soot blower using venturi mixing acetylene and air according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings and the detailed description, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making more clear and definite definitions of the protection scope of the present invention.
The utility model relates to a gas pulse soot blower using venturi to mix acetylene and air, which comprises an air cylinder a1, an acetylene cylinder b2, a valve a3, a valve b4, a flowmeter a5, a flowmeter b6, a connecting pipeline a7, a connecting pipeline b8, a venturi tube 9, a connecting pipeline c10 and a soot blowing tank 11; the venturi tube 9 comprises an inlet section 91, a tapered section 92, a throat 93, a diverging section 94, an outlet section 95 and an injection hole 96; the soot blowing tank 11 comprises an air inlet valve 111, a combustion chamber 112, an igniter 113, a nozzle section 114 and an end cover 115, wherein the nozzle section 114 comprises a magnet block a1141, a magnet hole a1142, a connecting shaft 1143, a magnet hole b1144 and a magnet block b1145, and the end cover 115 comprises a shaft sleeve 1151 and a cover plate 1152.
Referring to fig. 1, an air cylinder a1, a valve a3, a flowmeter a5, a connecting pipe a7 and an inlet section 91 of a venturi tube 9 are connected in sequence through flanges to form an air gas pipeline; the acetylene gas cylinder b2, the valve b4, the flowmeter b6, the connecting pipeline b8 and the injection hole 96 of the venturi tube 9 are sequentially connected through flanges to form an acetylene gas pipeline; the outlet section 95 of the venturi tube 9, the connecting pipe c10 and the air inlet valve 111 of the soot blowing tank 11 are connected in sequence through flanges to form a conveying pipeline of air-acetylene mixed gas.
Referring to fig. 2, the venturi tube 9 includes an inlet section 91, a tapered section 92, a throat 93, a diverging section 94, an outlet section 95, and an injection hole 96. The throat 93 is circular in cross-section, 18mm in internal diameter and 30mm in length. The cross-section of the injection hole 96 is circular, the inner diameter is 10mm, and the outer diameter is 12 mm. In the figure, a small-sized wire-frame arrow indicates a direction for injecting gas acetylene into the venturi tube 9, a medium-sized wire-frame arrow indicates a direction for leading mainstream gas air into the venturi tube 9, and a large-sized wire-frame arrow indicates a direction for leading the air-acetylene mixed gas after being sufficiently mixed to flow out of the venturi tube 9. Referring to fig. 3, the extension line of the tangent line of the upper wall surface of the tapered section 92 forms an angle of 16 degrees with the center line of the venturi tube 9, i.e., the taper angle of the tapered section 92 is 16 degrees. Referring to fig. 4, an angle between an extension line of a tangent line of an upper wall surface of the diverging section 94 and a center line of the venturi tube 9 is 7 degrees, that is, a diverging angle of the diverging section 94 is 7 degrees.
Referring to fig. 5 and 6, the ash can 11 includes an intake valve 111, a combustion chamber 112, an igniter 113, a throat section 114, and an end cap 115; the nozzle section 114 comprises a magnet block a1141, a magnet hole a1142, a connecting shaft 1143, a magnet hole b1144 and a magnet block b1145, wherein the magnet block a1141 is a cuboid with a length of 20mm, a width of 8mm and a height of 4mm, the magnet hole a1142 with the same size is arranged at the upper part of the nozzle section 114, and the magnet block a1141 can be embedded into the magnet hole a 1142; the magnet block b1145 has a semicircular arch shape with an inner diameter of 44mm and an outer diameter of 46mm, the right end of the nozzle section 114 has a magnet hole b1144 with the same size, and the magnet block b1145 can be embedded in the magnet hole b 1144. Referring to fig. 7, the end cap 115 includes a sleeve 1151 and a cover 1152, and the end cap 115 is made of a ferrous material and can be attracted by a magnet. A sleeve 1151 is arranged on the end cover 115, and the sleeve 1151 is matched with the connecting shaft 1143.
In the gas pulse soot blower, the air-acetylene mixing ratio is the volume ratio of air and acetylene gas in the mixed gas, and because the flow meters a5 and b6 both have volume flow rates, the air-acetylene mixing ratio can also be expressed as the ratio of the flow rates of the air and the acetylene gas.
The concrete implementation process is described below by taking acetylene and air mixed soot blowing as an example. In the stage of injecting and mixing air intake by air and acetylene, firstly, as shown in fig. 5, an air intake valve 111 of the ash blowing tank 11 is opened, and an end cover 115 at the right end of the ash blowing tank 11 is closed, as shown in fig. 8, so that the end cover 115 is attached to the right end of the nozzle section 114, and the gas is prevented from escaping; next, as shown in fig. 1, the valve a3 of the air cylinder a1 is opened, and air flows out from the air cylinder a1, passes through the valve a3, the flow meter a5 and the connecting pipe a7 in sequence to the venturi tube 9; then a valve b4 of an acetylene gas cylinder b2 is opened, acetylene gas flows out from the acetylene gas cylinder b2 and sequentially passes through the valve b4, a flow meter b6 and a connecting pipeline b8 to the Venturi tube 9, and the two gases are fully mixed in the Venturi tube 9 to form air-acetylene mixed gas. The mixing ratio of air and acetylene can be changed by adjusting the opening degree of the valve a3, and the minimum mixing ratio of air and acetylene (11.5) required by explosion soot blowing can be met by adjusting the valve a3 to be smaller; adjusting the adjusting valve a3 to a medium opening degree, so as to meet the air-acetylene mixing ratio (12.0) of the full reaction of acetylene and air; the valve a3 is adjusted to a larger opening degree, so that the air-acetylene mixing ratio (12.6) for ensuring the complete combustion of acetylene can be met; finally, the air-acetylene mixture flows out of the outlet section 95 of the venturi tube 9, through the connecting pipe c10, from the air intake valve 111 into the ash blowing tank 11. In the pulse soot blowing stage, as shown in fig. 5, when the soot blowing tank 11 is filled with the air-acetylene mixed gas, the air inlet valve 111 of the soot blowing tank 11 is closed, and the igniter 113 is started to ignite, so that the mixed gas is rapidly combusted and exploded to generate high-temperature and high-pressure flue gas. The high-temperature and high-pressure flue gas quickly diffuses to the nozzle section 114 of the soot blowing tank to push the end cover 115 at the right end of the soot blowing tank 11 to be opened, the opened state is shown in fig. 9, and the high-temperature and high-pressure flue gas rushes to the soot blowing part, so that the soot blowing effect can be realized.
At venturi tube 9, referring to fig. 2, the mainstream air enters venturi tube 9 from inlet section 91 along the direction indicated by the medium-sized wire-frame arrow, the flow velocity is accelerated through the convergent section 92, the pressure is reduced, a low pressure region is formed at throat 93, the pressure of acetylene gas is higher than the air pressure at throat 93, due to the action of pressure difference, acetylene gas enters venturi tube 9 throat 93 from injection hole 96 along the direction of the small-sized wire-frame arrow, and joins with the mainstream air, then the two are fully mixed at divergent section 94, and finally, venturi tube 9 flows out from outlet section 95 along the direction of the large-sized wire-frame arrow, and the above process can realize uniform and full mixing of air and acetylene gas. According to the combustion reaction formula of acetylene: 2C2H2+5O2→4CO2+2H2O, combined with the oxygen content of the air of about 21% by volume, when the flow rate of the air-acetylene mixed gas is Q1m3At the time of/h, the flow rate of the air is 0.92Q1m3H, flow rate of acetylene gas 0.08Q1m3At this time, the minimum air-acetylene mixing ratio required for explosive sootblowing. When the air-acetylene mixing ratio is within the range of 11.5-12.6, the soot blowing effect can be met. Therefore, the gas pulse soot blower adopts the pipeline arrangement and the valve regulation mode, and the applicable working condition meets the requirements that the pressure of an air source is 0.25-0.60 MPa, the pressure of an acetylene source is 0.10-0.15 MPa, and the air-acetylene mixing ratio in the explosion soot blowing process is 11.5-12.6.
Before the end cap 115 is operated, as shown in fig. 8, before the mixed gas is supplied to the soot blowing tank 11, the end cap 115 at the right end of the soot blowing tank 11 is closed, and at this time, the end cap 115 is adsorbed by the magnet block b1145, thereby preventing the gas leakage. After the mixed gas explodes, the high-temperature and high-pressure flue gas pushes the end cover 115 to turn upwards along the connecting shaft 1143, and when the flue gas is turned over to the upper part of the nozzle section 114, the magnet block a1141 absorbs the end cover 115, as shown in fig. 9, so that the end cover 115 is prevented from colliding back and forth and affecting the soot blowing effect. After soot blowing is completed, the end cover 115 is continuously restored to a closed state, so that the whole soot blowing injection system is closed, and then the next soot blowing can be performed.
In summary, the utility model utilizes the venturi tube to mix acetylene and air, so that two gases can be fully premixed in proportion, and further the combustion and explosion effects are improved; high-temperature and high-pressure flue gas generated by combustion and explosion is used for pushing the end cover adsorbed by the magnet to be opened, so that gas leakage before explosion ignition when gas is input is prevented.
Claims (5)
1. The utility model provides an utilize gas pulse soot blower of mixed acetylene of venturi and air which characterized in that: the device comprises an air cylinder a (1), an acetylene cylinder b (2), a valve a (3), a valve b (4), a flowmeter a (5), a flowmeter b (6), a connecting pipeline a (7), a connecting pipeline b (8), a Venturi tube (9), a connecting pipeline c (10) and a soot blowing tank (11); the air cylinder a (1), the valve a (3), the flowmeter a (5), the connecting pipeline a (7) and the inlet section (91) of the Venturi tube (9) are sequentially connected through flanges to form an air gas pipeline; the acetylene gas cylinder b (2), the valve b (4), the flowmeter b (6), the connecting pipeline b (8) and the injection hole (96) of the Venturi tube (9) are sequentially connected through flanges to form an acetylene gas pipeline; the outlet section (95) of the Venturi tube (9), the connecting pipeline c (10) and the air inlet valve (111) of the soot blowing tank (11) are sequentially connected through flanges to form a conveying pipeline of air-acetylene mixed gas.
2. The gas pulse sootblower using venturi mixing acetylene and air according to claim 1, characterized in that: the Venturi tube (9) comprises an inlet section (91), a reducing section (92), a throat part (93), a divergent section (94), an outlet section (95) and an injection hole (96), wherein the reducing angle of the reducing section (92) is 16 degrees, and the divergent angle of the divergent section (94) is 7 degrees; the section of the throat part (93) is circular, the inner diameter is 18mm, and the length is 30 mm; the cross section of the injection hole (96) is circular, the inner diameter is 10mm, and the outer diameter is 12 mm.
3. The gas pulse sootblower using venturi mixing acetylene and air according to claim 1, characterized in that: the ash blowing tank (11) comprises an air inlet valve (111), a combustion chamber (112), an igniter (113), a nozzle section (114) and an end cover (115); the nozzle section (114) comprises a magnet block a (1141), a magnet hole a (1142), a connecting shaft (1143), a magnet hole b (1144) and a magnet block b (1145), wherein the magnet block a (1141) is a cuboid, the length of the magnet block a is 20mm, the width of the magnet block b is 8mm, the height of the magnet block b is 4mm, the magnet block b (1145) is semicircular arch-shaped, the inner diameter of the magnet block b is 44mm, and the outer diameter of the magnet block b is 46 mm; the end cover (115) comprises a shaft sleeve (1151) and a cover plate (1152), and the end cover (115) is made of a ferrous material.
4. The gas pulse sootblower using venturi mixing acetylene and air according to claim 1, characterized in that: a connecting shaft (1143) is arranged on a nozzle section (114) of the ash blowing tank (11), a shaft sleeve (1151) is arranged on an end cover (115), and the shaft sleeve (1151) is matched with the connecting shaft (1143).
5. The gas pulse sootblower using venturi mixing acetylene and air according to claim 1, characterized in that: the gas pulse soot blower requires that the pressure of an air source is 0.25-0.60 MPa, the pressure of an acetylene source is 0.10-0.15 MPa, and the air-acetylene mixing ratio in the explosion soot blowing process is 11.5-12.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922149750.6U CN211316217U (en) | 2019-12-04 | 2019-12-04 | Gas pulse soot blower using venturi to mix acetylene and air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922149750.6U CN211316217U (en) | 2019-12-04 | 2019-12-04 | Gas pulse soot blower using venturi to mix acetylene and air |
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| Publication Number | Publication Date |
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| CN211316217U true CN211316217U (en) | 2020-08-21 |
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| CN201922149750.6U Active CN211316217U (en) | 2019-12-04 | 2019-12-04 | Gas pulse soot blower using venturi to mix acetylene and air |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117109930A (en) * | 2023-10-23 | 2023-11-24 | 中国空气动力研究与发展中心空天技术研究所 | Multipath parameter adjustment direct-connected test platform under low total temperature condition |
-
2019
- 2019-12-04 CN CN201922149750.6U patent/CN211316217U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117109930A (en) * | 2023-10-23 | 2023-11-24 | 中国空气动力研究与发展中心空天技术研究所 | Multipath parameter adjustment direct-connected test platform under low total temperature condition |
| CN117109930B (en) * | 2023-10-23 | 2023-12-26 | 中国空气动力研究与发展中心空天技术研究所 | Multipath parameter adjustment direct-connected test platform under low total temperature condition |
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