CN111089304A

CN111089304A - Ash removal device for reducing high-temperature corrosion

Info

Publication number: CN111089304A
Application number: CN201911398968.3A
Authority: CN
Inventors: 张焕亨; 李潭; 潘扬; 郭占魁; 黄东涛; 朱燕云
Original assignee: Guangzhou Huantou Design And Research Institute Co ltd
Current assignee: Guangzhou Huantou Design And Research Institute Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-01

Abstract

The invention relates to a dust cleaning device for reducing high-temperature corrosion, which is used for cleaning dust of a garbage incineration hearth and discloses that three communicated flues are arranged in the hearth, guide pipes are respectively arranged at the tops of a second flue and a third flue, a navigation suspension is arranged above the hearth, a hose driving device and a booster pump are arranged on a mobile platform of the navigation suspension, one end of a water supply hose on the hose driving device is connected with a water outlet of the booster pump, the other end of the water supply hose is connected with a rotary spray head, a PLC remote control system can control the mobile platform on the navigation suspension to transversely move above the second flue and the third flue, the hose driving device can unfold or wind the water supply hose, the rotary spray head vertically penetrates through the guide pipes along with the water supply hose to be inserted into or drawn out of the interiors of the second flue and the third flue, and the rotary spray. The invention has the advantages of small installation space, space saving, convenient arrangement, low operation cost, no corrosion problem and long operation period.

Description

Ash removal device for reducing high-temperature corrosion

Technical Field

The invention relates to the field of waste incineration power generation, in particular to a two-flue and three-flue ash removal device for reducing high-temperature corrosion of a waste incinerator.

Background

At present, the garbage incinerator generally has the problem of high-temperature corrosion of a heating surface, and the main influencing factor of the high-temperature corrosion is the problem of dust deposition on the heating surface. The ash deposits on the heating surface are in a molten state at high temperature, and the molten ash deposits on the heating surface cause molten salt corrosion on the heating surface. In addition, the heat transfer is deteriorated due to the deposition of ash on the heating surface, particularly, the deposition of ash on the heating surface of the second flue and the third flue of the furnace causes the temperature of the smoke in the second flue and the third flue to be not reduced, thereby causing the over-temperature of the smoke at the superheater of the horizontal flue and finally causing the high-temperature corrosion of the superheater.

The traditional garbage incinerator soot blowing equipment is arranged in a horizontal flue of a boiler, and soot cleaning methods such as vibration ash cleaning, sound wave soot blowing, pulse soot blowing, steam soot blowing and the like are adopted. Although the ash removal scheme relieves the high-temperature corrosion of the superheater of the horizontal flue to a certain extent, the effect is not obvious. Because the ash deposits on the heating surfaces of the second flue and the third flue of the hearth exist, the smoke temperature at the inlet of the horizontal flue can not be reduced all the time, and the high-temperature corrosion at the superheater is easily caused. Therefore, to solve the problem of high-temperature corrosion of the superheater of the garbage incinerator, the soot blowing scheme of the second flue and the third flue is important.

Disclosure of Invention

The invention aims to provide a dust cleaning method for reducing high-temperature corrosion, which is characterized in that dust cleaning systems for water dust cleaning are arranged in a second flue and a third flue of a garbage incinerator to clean dust deposited on the heated surfaces of the walls of the second flue and the third flue, so that the heat absorption capacity of the heated surfaces is increased, the smoke temperature at the inlet of a horizontal flue is further reduced, and the high-temperature corrosion is reduced.

The technical scheme of the invention is that on the basis of a horizontal flue, a horizontal flue superheater, a rotary spray head, a water supply hose, a guide pipe, a navigation suspension, a hose driving device, an electric control box, a PLC remote control system, a booster pump and a hearth, the invention is characterized in that three communicated flues are sequentially and vertically arranged in the hearth, the tops of a second flue and a third flue are respectively provided with the guide pipe, the navigation suspension is arranged above the hearth, a hose driving device and the booster pump are arranged on a moving platform of the navigation suspension, one end of the water supply hose on the hose driving device is connected with the water outlet of the booster pump, the other end of the water supply hose is connected with the rotary spray head, the PLC remote control system can control the moving platform on the navigation suspension to transversely move to the positions above the second flue and the third flue, the hose driving device can unfold or wind the water supply hose, the rotary spray head vertically penetrates through the guide pipe along with the water supply, the rotary spray head is an automatic rotary spray type spray head.

The guide pipe interface prevents for leaking hopper-shaped that it spills water and spills on the platform, can make things convenient for rotatory nozzle and water supply hose to get into, and is provided with automatic valve at the guide pipe, and when non-washing furnace, automatic valve closes, makes the inside and external environment of furnace keep apart.

The bottom of the rotary spray head is provided with a rotatable semi-sphere, four nozzles are arrayed at intervals of ninety degrees on the periphery of the semi-sphere, the spraying direction of the nozzles is inclined anticlockwise, the water sprayed by the nozzles is fan-shaped, the round sphere at the bottom of the rotary spray head can automatically rotate under the action of water pressure, and water is sprayed from the nozzles to the surface of a furnace wall for ash removal.

The hose driving device comprises a motor, a winding disc and a motor controller, wherein the winding disc is arranged on a rotating shaft of the motor, the motor controller is connected with the motor through a lead, a water supply hose is wound on the winding disc, the hose driving device controls the water supply hose to drive a rotary nozzle to enter and exit a hearth flue in the spraying and sweeping process, controls the spraying depth of the water supply hose entering a hearth, and controls the water supply hose to be wound on the winding disc when the water supply hose is not sprayed.

The electric cabinet and the remote PLC control system are used for controlling the mobile station on the navigation suspension to move, position and stop, controlling the hose driving device to expand or coil the water supply hose and controlling the booster pump to start or stop, and the electric cabinet is also provided with an emergency stop and reset button and an automatic and manual change-over switch button.

The working principle of the invention is that the top of the second and third flues of the furnace chamber is provided with a suspension guide rail system, and the ash cleaning hose moves to different positions on the furnace top along the guide rail under the control of the electric cabinet and the PLC control system. When the ash removal is started, the ash removal hose with the rotary nozzle enters the hearth from a guide pipe arranged on the top of the furnace under the driving of a driving system, and the booster pump simultaneously boosts the water inlet of the hose. When the water supply hose and the rotary nozzle enter the specified dust removing depth and position of the hearth, the rotary nozzle starts to rotationally spray cleaning water under the action of internal water pressure. Water is sprayed to ash adhered to the heated surface of the furnace wall and enters into the fine slag holes, then the water is heated to expand rapidly, the volume of slag is expanded to break the ash and drop the ash from the heated surface, and the effect of cleaning the heated surface is achieved.

The traditional ash cleaning modes such as shock wave ash blowing, rapping ash cleaning, steam ash blowing and the like are only used for cleaning the surface of a heat exchanger in a convection area, have good cleaning effect and are not suitable for the ash blowing of a second flue and a third flue of a boiler. The invention is more suitable for the soot blowing of the second and third flues of the boiler by the scheme of water spraying and soot blowing through the hose, and has more ideal effect.

The invention has the beneficial effects that: the installation space that the scheme that the water blown the ash needs is little, practices thrift the space, conveniently arranges, does not need high-quality water, general industrial water or fire water can, reduced the running cost, the washing finishes, and the metal water supply hose will withdraw from and take in the hose reel completely, can not be detained in the boiler, does not have the corruption problem, has improved the operation cycle. The jetting hose can get into the furnace jetting at furnace roof different positions, can control and spout at the different degree of depth of furnace, and convenient effectual lime-ash of cleaning different positions of furnace to reach better deashing effect. The heating surfaces of the second flue and the third flue are cleaned, the design working condition is ensured, and the corrosion of the water-cooled wall is reduced.

The smoke temperature at the inlet of the superheater is reduced, the ash deposition and corrosion of the superheater are reduced, and the running time of the unit is prolonged. The heat absorption capacity of the water-cooled wall is ensured, the garbage treatment capacity is improved, and the increase of the heating surface is avoided.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Detailed Description

According to the invention, as shown in fig. 1, on the basis of a horizontal flue 5, a horizontal flue superheater 6, a rotary spray head 7, a water supply hose 9, a guide pipe 10, a navigation suspension 11, a hose driving device 12, an electric cabinet 13, a PLC remote control system 14, a booster pump 15 and a hearth 16, the invention is characterized in that: three communicated flues, namely a first flue 1, a second flue 2 and a third flue 3, are sequentially and vertically arranged in series end to end in a hearth 16, a horizontal flue 5 is communicated with a tail end port of the third flue 3, a horizontal flue superheater 6 is arranged in the horizontal flue 5, guide pipes 10 are respectively arranged at the tops of the second flue 2 and the third flue 3, a navigation suspension 11 is arranged above the hearth 16, a hose driving device 12 and a booster pump 15 are arranged on a moving platform of the navigation suspension 11, one end of a water supply hose 9 on the hose driving device 12 is connected with a water outlet of the booster pump 15, a water inlet of the booster pump is connected with a water source, the other end of the water supply hose 9 is connected with a rotary spray head 7, a PLC remote control system 14 can control the moving platform on the navigation suspension 11 to transversely move above the second flue and the third flue, and the hose driving device 12 can unfold or coil the water, and the rotary spray head 7 vertically penetrates through the guide pipe along with the water supply hose 9 to be inserted into or drawn out of the second flue 2 and is switched to be inserted into or drawn out of the third flue 3, water is sprayed on the inner walls 4 of the second flue 2 and the third flue 3 of the hearth for ash removal, and the rotary spray head 7 is an automatic rotary spray type spray head.

The guiding tube 10 interface prevents for leaking hopper-shaped that it spills water and spills on the platform, can make things convenient for rotatory nozzle 7 and water supply hose 9 to get into, and is provided with automatic valve at the guiding tube, and when non-washing furnace, automatic valve closes, makes the inside and external environment of furnace keep apart.

The bottom of the rotary spray head 7 is provided with a rotatable semi-sphere, the periphery of the semi-sphere is provided with four nozzles at intervals of ninety-degree angle array, the spraying direction of the nozzles is inclined anticlockwise, the spraying water flow 8 of the nozzles is fan-shaped, the round sphere at the bottom of the rotary spray head can rotate automatically under the action of water pressure, and water is sprayed out of the nozzles to the surface of the furnace wall 4 to remove ash.

The hose driving device 12 is composed of a motor, a winding disc and a motor controller, the winding disc is installed on a motor rotating shaft, the motor controller is connected with the motor through a conducting wire, a water supply hose is wound on the winding disc, the hose driving device 12 controls the water supply hose 9 to drive the rotary nozzle 7 to enter and exit a flue of the hearth 16 in the spraying and sweeping process, the spraying depth of the water supply hose 7 entering the hearth is controlled, and the water supply hose 7 is controlled to be wound on the winding disc when the water supply hose is not sprayed.

The electric cabinet 13 and the remote PLC control system 14 are used for controlling the mobile station on the navigation suspension 11 to move, position and stop, controlling the hose driving device 12 to unfold or wind the water supply hose 9 and controlling the booster pump 15 to start or stop, and the electric cabinet 13 is also provided with an emergency stop and reset button and an automatic and manual change-over switch button.

Claims

1. The utility model provides a alleviate high temperature corrosion's ash removal device, it includes horizontal flue, horizontal flue superheater, rotatory nozzle, water supply hose, the guiding tube, the navigation suspension, hose drive arrangement, the electric cabinet, PLC remote control system, the booster pump, furnace, its characterized in that: the automatic spraying type water supply device is characterized in that three communicated flues are sequentially and vertically arranged in the hearth, guide pipes are respectively arranged at the tops of the second flue and the third flue, a navigation suspension is arranged above the hearth, a hose driving device and a booster pump are installed on a moving platform of the navigation suspension, one end of a water supply hose on the hose driving device is connected with a water outlet of the booster pump, the other end of the water supply hose is connected with a rotary nozzle, a PLC remote control system can control the moving platform on the navigation suspension to transversely move to the positions above the second flue and the third flue, the hose driving device can expand or coil the water supply hose, the rotary nozzle vertically penetrates through the guide pipes along with the water supply hose to be inserted into or drawn out of the interiors of the second flue and the third flue, and the.

2. The ash removal device for reducing high temperature corrosion according to claim 1, wherein: the guide pipe interface prevents for leaking hopper-shaped that to spray the water droplet and spill on the platform, can make things convenient for rotatory nozzle and water supply hose to get into, and is provided with automatic valve at the guide pipe, and when non-washing furnace, automatic valve closes, makes the inside and external environment of furnace keep apart.

3. The ash removal device for reducing high temperature corrosion according to claim 1, wherein: the bottom of rotatory nozzle sets up revolvable semicircle ball, and the ninety degree angle array of interval has four nozzles all around on the semicircle ball, and the spray direction counter-clockwise deflection of nozzle, the rivers that spray of nozzle are fan-shaped, and the ball of rotatory nozzle bottom can autogiration under hydraulic effect to spout water from the nozzle and carry out the deashing to the brickwork surface.

4. The ash removal device for reducing high temperature corrosion according to claim 1, wherein: the hose driving device is composed of a motor, a winding disc and a motor controller, wherein the winding disc is installed on a motor rotating shaft, the motor controller is connected with the motor through a wire, a water supply hose is wound on the winding disc, the hose driving device controls the water supply hose to drive the rotary nozzle to enter and exit from a hearth flue in the spraying and sweeping process, the water supply hose is controlled to enter the hearth spraying depth, and the water supply hose is controlled to be wound on the winding disc when the water supply hose is not sprayed.

5. The ash removal device for reducing high temperature corrosion according to claim 1, wherein: the electric cabinet and the remote PLC control system are used for controlling the mobile station on the navigation suspension to move, position and stop, controlling the hose driving device to unfold or coil the water supply hose and controlling the booster pump to start or stop, and the electric cabinet is also provided with an emergency stop and reset button and an automatic and manual change-over switch button.