CN111947153B

CN111947153B - Double-hearth kiln spray gun with combustion-supporting and cooling air sleeve

Info

Publication number: CN111947153B
Application number: CN202010647001.0A
Authority: CN
Inventors: 刘时球; 唐贤林; 谭冬; 张少华; 王义飞; 陈建中; 侯晓刚
Original assignee: China Ryukyu Technology Co ltd
Current assignee: China Ryukyu Technology Co ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2022-07-12
Anticipated expiration: 2040-07-07
Also published as: CN111947153A

Abstract

The invention discloses a double-hearth kiln spray gun with a combustion-supporting and cooling air sleeve, which belongs to the technical field of double-hearth kilns and comprises a solid material conveying pipe, wherein a solid material interface is arranged at one end of the solid material conveying pipe, a spray head is arranged at the other end of the solid material conveying pipe, a gas cavity is fixed at one end, close to the solid material interface, of the outer side of the solid material conveying pipe, a three-way valve is arranged at the bottom of the gas cavity, the three-way valve is respectively connected with a cold air interface and a gas interface, and the gas conveying pipe is uniformly arranged at the outer side of the gas cavity. The arrangement of the solid material conveying pipe inside the sprayer and the gas conveying pipe outside the sprayer can utilize gas to support combustion of low-calorific-value fuel in the using process, improves the practicability of the device, can conveniently loosen the low-calorific-value fuel by fixing the arrangement of the conical block inside the conveying pipe, is matched with the spiral plate outside the conveying pipe to guide the gas, can accelerate the mixing of the low-calorific-value fuel and the gas, and improves the combustion effect.

Description

Double-hearth kiln spray gun with combustion-supporting and cooling air sleeve

Technical Field

The invention relates to a spray gun, in particular to a double-hearth kiln spray gun with a combustion-supporting and cooling air sleeve, and belongs to the technical field of double-hearth kilns.

Background

The double-hearth lime kiln is provided with two hearths, the two hearths alternately calcine and preheat ores, a connecting channel is arranged between the bottoms of the calcining belts of the two hearths and communicated with each other, and the working states of the hearths are changed by reversing once every 15 minutes. During operation, the two kiln chambers are alternately filled with powdery ore, fuel is respectively fed from the upper parts of the two kiln chambers, and the fuel is uniformly distributed on the section of the whole kiln chamber through a plurality of spray guns arranged at the bottom of the preheating zone, so that the raw material ore is uniformly calcined;

the invention provides a double-chamber kiln spray gun with a combustion-supporting and cooling air sleeve to solve the problems in the prior art.

Disclosure of Invention

The invention mainly aims to provide a double-hearth kiln spray gun with a combustion-supporting and cooling air sleeve, which aims to solve the problem that low-calorific-value gas cannot be combusted in the prior art.

The purpose of the invention can be achieved by adopting the following technical scheme:

the utility model provides a take combustion-supporting and cooling air sheathed tube two thorax kiln spray gun, includes solid material conveyer pipe, gu the one end of material conveyer pipe is installed admittedly and is expected the interface, and the other end of solid material conveyer pipe installs the shower nozzle, gu the conveyer pipe outside is close to the one end of solid material interface and is fixed with the gas chamber, and the bottom in gas chamber installs three way valve, and three way valve is connected with air conditioning interface and gas interface respectively, and three way valve is arranged in communicating one of air conditioning interface or gas interface with the gas chamber, gas conveyer pipe is evenly installed in the outside in gas chamber, and the one end that gas chamber was kept away from to gas conveyer pipe all switches on with the inside of shower nozzle, the one end of solid material interface is evenly provided with the spiral plate outside admittedly expecting the conveyer pipe.

Preferably: and a conical block is fixedly arranged at one end of the solid material conveying pipe, which is far away from the solid material interface, and the conical head of the conical block faces towards the inside of the solid material conveying pipe.

Preferably: the outer side of the solid material conveying pipe is fixed with a heat conducting block, the gas conveying pipe is located inside the heat conducting block, and radiating fins are evenly fixed on the outer side of the heat conducting block.

Preferably: the radiating fin is made of copper-aluminum alloy.

Preferably, the following components: the gas conveying pipes are provided with four groups, and the distances between the adjacent gas conveying pipes are the same.

Preferably: the spiral plate is provided with four groups, and the output port of the gas delivery pipe is located between the spiral plates.

The invention has the beneficial effects that:

according to the double-hearth kiln spray gun with the combustion-supporting and cooling air sleeve, the arrangement of the solid material conveying pipe inside the spray head and the outer gas conveying pipe can be used for supporting combustion of low-calorific-value fuels such as stone coal, coal gangue, oil shale, weathered coal, peat and lignite by using gas in the using process, the practicability of the device is improved, the arrangement of the conical block inside the fixed conveying pipe can facilitate loosening of the low-calorific-value fuels, the gas is guided by matching with the spiral plate outside the fixed conveying pipe, the mixing of the low-calorific-value fuels and the gas can be accelerated, the combustion effect is improved, the arrangement of the heat conducting block and the heat radiating fins outside the fixed conveying pipe can accelerate the heat radiation of the device in the using process, the damage of the device caused by overheating of the device is avoided, and the functionality of the device is improved. When the interior of the double-chamber kiln is required to be cooled, the three-way valve is switched to the cold air interface, then cold air can be introduced, and the rapid cooling of the interior of the double-chamber kiln can be realized.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a view showing the internal structure of the head of the present invention;

FIG. 3 is a cross-sectional view of a solids delivery tube of the present invention;

FIG. 4 is a front cross-sectional view of the dual-bore kiln of the present invention;

FIG. 5 is an enlarged view of the structure of FIG. 4 at A in accordance with the present invention;

FIG. 6 is a front view of the dual-bore kiln of the present invention.

In the figure: 101. a solid material conveying pipe; 102. a material fixing interface; 103. a spray head; 104. a gas chamber; 105. a gas interface; 106. a gas delivery pipe; 107. a heat conducting block; 108. a heat sink; 109. a spiral plate; 110. a conical block; 111. a three-way valve; 112. a cold air interface; 1. a heating chamber; 2. a first intake pipe; 3. a first three-way pipe; 4. a double-chamber kiln body; 5. a second three-way pipe; 6. a first electrically controlled valve; 7. an exhaust pipe; 8. a second intake pipe; 9. a third three-way pipe; 10. a second electrically controlled valve; 11. a motor; 12. a cam; 13. a chute; 14. a fixed tube; 15. a movable rod; 16. a spring; 17. a filter screen; 18. a collection frame; 19. a handle; 20. an exhaust port; 30. a controller; 31. a pressure sensor; 32. a push button switch; 33. and (4) a thermal insulation coating.

Detailed Description

In order to make the technical solutions of the present invention more clear and definite, the present invention will be further described in detail with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.

As shown in fig. 1-6, the present embodiment provides a dual-chamber kiln spray gun with a combustion-supporting and cooling air sleeve, which includes a solid material conveying pipe 101, a solid material interface 102 is installed at one end of the solid material conveying pipe 101, a nozzle 103 is installed at the other end of the solid material conveying pipe 101, a gas cavity 104 is fixed at one end of the outer side of the solid material conveying pipe 101, which is close to the solid material interface 102, a three-way valve is installed at the bottom of the gas cavity 104, the three-way valve is respectively connected with a cold air interface 112 and a gas interface 105, the three-way valve 111 is used for communicating one of the cold air interface 112 or the gas interface 105 with the gas cavity 104, a gas conveying pipe 106 is evenly installed at the outer side of the gas cavity 104, one end of the gas conveying pipe 106, which is far away from the gas cavity 104, is communicated with the inside of the nozzle 103, and a spiral plate 109 is evenly installed at one end of the outer side of the solid material conveying pipe 101, which is far away from the solid material interface 102. When the double-hearth kiln is required to be subjected to flame retardance, the three-way valve is switched to the gas interface, then gas can be introduced, and the flame retardance of feeding inside the double-hearth kiln can be realized. When the interior of the double-chamber kiln is required to be cooled, the three-way valve is switched to the cold air interface, then cold air can be introduced, and the rapid cooling of the interior of the double-chamber kiln can be realized.

In this embodiment, as shown in fig. 1, a conical block 110 is fixedly installed at one end of the solid material conveying pipe 101, which is far away from the solid material interface 102, a conical head of the conical block 110 faces the inside of the solid material conveying pipe 101, the transmitted solid material is uniformly conveyed to the outside of the solid material conveying pipe 101 by the conical block 110, and the mixing effect of the gas and the solid material is improved by matching with the gas flow blowing of the gas.

In this embodiment, as shown in fig. 1, a heat conduction block 107 is fixed on the outer side of the solid material delivery pipe 101, the gas delivery pipe 106 is located inside the heat conduction block 107, and fins 108 are uniformly fixed on the outer side of the heat conduction block 107, so that heat generated during use is conducted through the heat conduction block 107, and heat dissipation is accelerated through the fins 108.

In this embodiment, as shown in fig. 1, the heat sink 108 is made of copper-aluminum alloy, so as to improve the heat dissipation effect.

In the embodiment, as shown in fig. 1, four sets of gas delivery pipes 106 are provided, and the distances between adjacent gas delivery pipes 106 are the same, so that the gas can be distributed inside the showerhead 103 uniformly, and mixing is facilitated.

In this embodiment, as shown in fig. 1, four sets of spiral plates 109 are provided, and the output ports of the gas delivery pipe 106 are located between the spiral plates 109, so as to form spiral gas flow, so that the spiral gas flow can be fully mixed and combusted with the powdery solid material.

As shown in fig. 1-3, the working process of the dual-chamber kiln spray gun with combustion-supporting and cooling air sleeve provided by the embodiment is as follows:

step 1: before use, the device is installed, the solid material interface 102 and the gas interface 105 are conducted, in the process of conveying raw materials, solid fuel enters the inside of the solid material conveying pipe 101, then the fuel is discharged to the outside along the inner side wall of the solid material conveying pipe 101 under the guiding action of the conical block 110, in the discharge process of the solid fuel, the gas is discharged to the inside of the nozzle 103 through the gas conveying pipe 106, the gas is guided by the spiral plate 109, flows spirally in the nozzle 103 and is mixed with the solid fuel, and the combustion of the solid fuel is accelerated;

step 2: during the combustion process, the temperature of the solid material conveying pipe 101 and the gas conveying pipe 106 rises and is transmitted to the heat conducting block 107, and the surface area of the heat conducting block 107 is increased by the heat radiating fins 108 on the heat conducting block 107, so that the heat radiation is accelerated.

The double-hearth kiln spray gun of the embodiment can be used for the double-hearth kiln shown in fig. 4 to 6, specifically, the double-hearth kiln spray gun can be arranged at the position of a joint B, the spray head 103 of the spray gun is connected with the bottom of the hearth body, the solid material interface 102 is connected with the first three-way pipe 3, the gas interface 105 is communicated with the third three-way pipe 9, and then the cold air interface 112 is additionally connected with a cold air pipe to complete the connection. The double-chamber kiln using the spray gun of the invention has the following specific structure: comprises a heating bin 1 controller 30, a first air inlet pipe 2 is arranged in the heating bin 1, a first three-way pipe 3 is fixed at one end of the first air inlet pipe 2, a spray gun B is connected at the top of the first three-way pipe 3, a double-chamber kiln body 4 is further fixed at the spray gun B, a second three-way pipe 5 is fixed at the top of the double-chamber kiln body 4, a first electric control valve 6 is installed on the second three-way pipe 5, an exhaust pipe 7 is fixed at the top of the second three-way pipe 5, a second air inlet pipe 8 is arranged in the heating bin 1, a third three-way pipe 9 is fixed at one end of the second air inlet pipe 8, a second electric control valve 10 is arranged on the third three-way pipe 9, the third three-way pipe 9 is respectively communicated with gas interfaces 105 of the spray guns at the bottoms of the left and right chambers of the double-chamber kiln body 4, a chute 13 is symmetrically arranged on the inner side of the heating bin 1, a filter screen 17 is movably connected with the inner wall of the chute 13, and an electric cleaning mechanism is arranged on the filter screen 17, the bottom of the heating chamber 1 is fixed with a collecting frame 18, the exhaust pipe 7 is connected to one side of the heating chamber 1 close to the filter screen 17, and the other side of the heating chamber 1 is provided with an exhaust port 20.

The bottoms of the left and right chambers of the double-chamber kiln body 4 are respectively provided with a pressure sensor 31, the controller 30 is respectively connected with the first electric control valve 6, the second electric control valve 10, the pressure sensor 31 and the electric cleaning mechanism, the controller 30 is used for controlling the first electric control valve 6 and the second electric control valve 10 to be switched, so that the exhaust pipe 7 and the second air inlet pipe 8 are simultaneously communicated with the left chamber of the double-chamber kiln body 4, or the exhaust pipe 7 and the second air inlet pipe 8 are simultaneously communicated with the right bore of the double-bore kiln body 4, and the controller 30 is used for detecting that the value collected by the pressure sensor 31 of the left bore or the right bore is too large, the first electric control valve 6 and the second electric control valve 10 are switched to simultaneously communicate the exhaust pipe 7 and the second air inlet pipe 8 to the other chamber of the double-chamber kiln body 4, and sends out an alarm signal, and the controller 30 starts the electric cleaning mechanism to clean the ash after receiving the ash cleaning signal.

When the double-hearth kiln works, one hearth of the left and right hearth bodies of the double-hearth kiln body 4 can be simultaneously communicated with the exhaust pipe 7 and the second air inlet pipe 8 through the first electric control valve 6 and the second electric control valve 10, so that combustion supporting and combustion can be realized. After combustion, the tail gas enters the heating chamber 1 through the exhaust pipe 7, and heats the first air inlet pipe 2 and the second air inlet pipe 8. After combustion, the ash will accumulate on the screen at the bottom of the double-chamber kiln body, gradually rise and press against the pressure sensor 31. Pressure sensor 31 need use high temperature resistant, perhaps sets up pressure sensor 31 in the outside of two thorax kiln bodies 4, is connected to two thorax kiln bodies 4 through a connecting rod inside, and ashes can extrude the connecting rod, and then the connecting rod extrudees pressure sensor and realizes detecting. After the pressure sensor 31 detects that ash exists, the first electronic control valve 6 and the second electronic control valve 10 are switched, and then the other chamber starts to burn. At the moment, an alarm signal is sounded, the alarm signal can be an alarm lamp, a sound alarm signal and the like, and a user knows that ash is more and ash needs to be removed. The ash removing port on the bottom side wall of the double-chamber kiln body 4 can be opened to discharge ash to wait for the next combustion. Wherein, because of the reason of the drawing, first intake pipe 2 and second intake pipe 8 seem very short length, are actually that the annular winding is inside heating chamber 1, and length is very long, can realize the heating to gaseous.

The electric ash cleaning mechanism can adopt a blower form to blow air on the filter screen, or adopts a water flushing form to flush by spraying water through a spray head on the filter screen.

In this embodiment, as shown in fig. 5 to 6, the electric cleaning mechanism includes a motor 11, a fixed pipe 14, a movable rod 15 and a button switch 32, the motor 11 is located outside the heating chamber 1, an output shaft of the motor 11 is fixed with a cam 12 through a coupler, the fixed pipe 14 is located on an inner wall of the chute 13, the inner wall of the fixed pipe 14 is movably connected with the movable rod 15, the button switch 32 is disposed at the bottom of the fixed pipe 14, one end of the fixed pipe 14 is fixed with a spring 16, one end of the spring 16 away from the fixed pipe 14 is fixedly connected with a filter screen 17, the motor 11 and the button switch 32 are connected with a controller 30, and the controller 30 is configured to turn on the motor 11 to rotate for a preset period of time after the button switch 32 is triggered, stop the motor 11 and return to the original position. The deashing signal can be artifical manual button signal, then when needing to clear up filter screen 17, press the button, starter motor 11, motor 11 drives cam 12 and rotates, cam 12 rotates fast and then intermittent type nature promotes filter screen 17 and removes to fixed pipe 14 one side, and under spring 16's spring action, filter screen 17 rebounds cam 12 one side, can produce vibrations when filter screen 17 moves fast and then make the dust on the filter screen 17 drop to collecting in the frame 18, need not to dismantle the filter screen and can clear up, staff's work load has been alleviateed, and the difficult scald of operation safe and reliable. And the deashing signal can be triggered by button switch 32, and when the dust is more, filter screen 17 has great extrusion force, can move filter screen 17 to the right side, and movable rod 15 extrudees button switch 32 and triggers automatic deashing. After the ash removal is finished, the motor needs to be reset, and the situation that the motor always props the button switch after propping the filter screen is avoided. If the stepping motor is adopted, the motor is directly controlled to return. If the motor is other motors, the motor can be controlled to stop, and then whether the button switch is in the trigger state or not is detected, if the motor is in the trigger state, the motor is not reset, and then the motor is rotated and stopped until the button switch is detected not to be in the trigger state.

In this embodiment, as shown in fig. 4, the thermal insulation coating 33 is disposed on the outer sides of the second air inlet pipe 8 and the exhaust pipe 7, so as to prevent the hot air from losing heat when passing through the exhaust pipe 7 and the second air inlet pipe 8, which causes resource waste, thereby improving the utilization rate of resources.

In this embodiment, as shown in fig. 4, the first air inlet pipe 2 is a curved pipe, and one end of the second air inlet pipe 8 is provided with a curved pipe, so that on one hand, air is concentrated into the heating chamber 1, and on the other hand, the contact time between cold air in the pipe and hot air in the heating chamber 1 is prolonged, so that the temperature of the air in the pipe is increased as much as possible, and the combustion rate of the dual-chamber kiln is increased.

In the present embodiment, as shown in fig. 6, a handle 19 is disposed on one side of the collecting frame 18, and a thermal insulation layer is disposed on the outer side of the handle, so that people are not easily burned by the high temperature of the handle when cleaning the smoke in the collecting frame 18.

In this embodiment, as shown in fig. 5, the outside of the filter screen 17 is provided with a sealing gasket, and the sealing gasket is a rubber sealing gasket, and the sealing gasket arranged on both sides of the filter screen 17 can reduce the gap between the filter screen 17 and the inner side wall of the heating chamber 1, so that the smoke is not easy to enter the other side of the filter screen 17 when the filter screen 17 moves to pollute the inside of the heating chamber 1.

The above description is only for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the scope of the present invention.

Claims

1. The utility model provides a two thorax kiln spray guns of burning-supporting and cooling air sheathed tube in area which characterized in that: comprises a solid material conveying pipe (101), one end of the solid material conveying pipe (101) is provided with a solid material interface (102), and the other end of the solid material conveying pipe (101) is provided with a spray head (103), one end of the outer side of the solid material conveying pipe (101) close to the solid material interface (102) is fixed with a gas cavity (104), and the bottom of the gas cavity (104) is provided with a three-way valve (111), the three-way valve (111) is respectively connected with a cold air interface (112) and a gas interface (105), the three-way valve (111) is used for communicating one of the cold air interface (112) or the gas interface (105) with the gas cavity (104), the outer side of the gas cavity (104) is uniformly provided with a gas delivery pipe (106), and one end of the gas delivery pipe (106) far away from the gas cavity (104) is communicated with the interior of the spray head (103), one end of the outer side of the solid material conveying pipe (101), which is far away from the solid material interface (102), is uniformly provided with a spiral plate (109);

a conical block (110) is fixedly installed at one end, far away from the solid material interface (102), of the solid material conveying pipe (101), and the conical head of the conical block (110) faces towards the inside of the solid material conveying pipe (101);

the outside of the solid material conveying pipe (101) is fixed with a heat conducting block (107), the gas conveying pipe (106) is positioned inside the heat conducting block (107), and the outside of the heat conducting block (107) is uniformly fixed with radiating fins (108).

2. The double-chamber kiln spray gun with combustion-supporting and cooling air sleeve of claim 1, which is characterized in that: the cooling fin (108) is made of copper-aluminum alloy.

3. The double-chamber kiln spray gun with combustion-supporting and cooling air sleeve of claim 1, which is characterized in that: the gas conveying pipes (106) are provided with four groups, and the distances between the adjacent gas conveying pipes (106) are the same.

4. The double-chamber kiln spray gun with combustion-supporting and cooling air sleeve of claim 1, which is characterized in that: the spiral plates (109) are provided with four groups, and the output ports of the gas conveying pipes (106) are all located between the spiral plates (109).