阅读说明：本技术 一种垃圾焚烧余热锅炉在线水力清灰系统 (Online hydraulic deashing system of waste incineration exhaust-heat boiler ) 是由 曹德标 林蒙 赵平 宋小康 李军 李阳 顾春华 姜杭杰 王允旭 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种垃圾焚烧余热锅炉在线水力清灰系统,涉及炉膛在线清灰系统,解决了现有技术容易存在清洗不到的死角,且清洁效率差等问题。包括清洁件和若干预制管道,清洁件上连接有用于驱动其横向移动的第一驱动件,且清洁件的移动路径经过各预制管道上方；预制管道下端皆连通至锅炉烟道内,预制管道上设有用于启闭的切断阀；清洁件包括清洁喷嘴以及第二驱动件,第二驱动件驱动清洁喷嘴在预制管道内上下移动。达到了高效的对烟道积灰结焦进行清洁,布置方便,调整灵活,工作效率高,节约运行和维护费用的效果。(The invention discloses an online hydraulic ash removal system for a waste incineration exhaust-heat boiler, relates to an online hearth ash removal system, and solves the problems that in the prior art, dead corners which cannot be cleaned easily exist, the cleaning efficiency is poor, and the like. The cleaning device comprises a cleaning piece and a plurality of prefabricated pipelines, wherein the cleaning piece is connected with a first driving piece for driving the cleaning piece to transversely move, and the moving path of the cleaning piece passes above each prefabricated pipeline; the lower end of the prefabricated pipeline is communicated to the inside of a boiler flue, and the prefabricated pipeline is provided with a cut-off valve for opening and closing; the cleaning piece comprises a cleaning nozzle and a second driving piece, and the second driving piece drives the cleaning nozzle to move up and down in the prefabricated pipeline. The flue dust and coke deposition cleaning device has the advantages of efficiently cleaning flue dust and coke deposition, convenient arrangement, flexible adjustment, high working efficiency and operation and maintenance cost saving.)

1. The utility model provides an online water conservancy deashing system of msw incineration exhaust-heat boiler which characterized in that: the cleaning device comprises a cleaning piece and a plurality of prefabricated pipelines (202), wherein a first driving piece for driving the cleaning piece to transversely move is connected to the cleaning piece, and the moving path of the cleaning piece passes through the upper part of each prefabricated pipeline (202); the lower end of the prefabricated pipeline (202) is communicated to the boiler flue, and a cut-off valve (201) for opening and closing is arranged on the prefabricated pipeline (202);

the cleaning member comprises a cleaning nozzle (105) and a second driving member, and the second driving member drives the cleaning nozzle (105) to move up and down in the prefabricated pipe (202).

2. The on-line hydraulic deashing system of the waste incineration exhaust-heat boiler according to claim 1, characterized in that: the first driving piece comprises a mounting guide rail (101) and a traveling mechanism (102) moving along the mounting guide rail (101), and the cleaning piece is connected to the lower portion of the traveling mechanism (102).

3. The on-line hydraulic ash removal system for the waste incineration waste heat boiler as claimed in claim 1 or 2, wherein: the second driving piece comprises a winding drum (103) and a hose (104), the winding drum (103) is driven to rotate by a motor, the hose (104) is wound on the winding drum (103), the cleaning nozzle (105) is communicated with one end of the hose (104), and the other end of the hose (104) is communicated with a cooling water supply system.

4. The on-line hydraulic deashing system of the waste incineration exhaust-heat boiler according to claim 3, characterized in that: the cooling water supply system comprises a cooling water pipeline (110) communicated with a hose (104), a cooling water source is arranged at the outer end of the cooling water pipeline (110), and a pressurizing water pump (106) and a water inlet stop valve (107) are arranged on the cooling water pipeline (110).

5. The on-line hydraulic deashing system of the waste incineration exhaust-heat boiler according to claim 4, characterized in that: the cooling water pipeline (110) is also provided with a water inlet flow regulating valve (108) and a check valve (109), cooling water is pressurized by the pressurizing water pump (106), and then the flow of the cooling water is regulated through the water inlet flow regulating valve (108), so that the cleaning nozzle (105) forms a water sprayer with water drops of preset size and momentum, and the sprayed water is sprayed to the water wall of the hearth.

6. The on-line hydraulic deashing system of the waste incineration exhaust-heat boiler according to claim 1, characterized in that: the top of the prefabricated pipeline (202) is communicated with a compressed air pipeline (203), the outer end of the compressed air pipeline (203) is communicated to a compressed air source, and an inlet stop valve (204) for controlling opening and closing is arranged on the compressed air pipeline (203).

7. The on-line hydraulic ash removal system for the waste incineration waste heat boiler as claimed in claim 1 or 6, wherein: the prefabricated pipeline (202) sequentially comprises a top pipeline, a middle pipeline and a bottom pipeline, the top pipeline is vertically connected to the top of the waste heat boiler, and the bottom pipeline is vertically arranged and extends into a flue of the waste heat boiler.

8. The on-line hydraulic deashing system of the waste incineration exhaust-heat boiler according to claim 7, characterized in that: the included angle alpha between the middle pipeline and the vertical direction is less than or equal to 30 degrees.

9. The on-line hydraulic deashing system of the waste incineration exhaust-heat boiler according to claim 2, characterized in that: the top of the waste heat boiler is connected with two rows of prefabricated pipelines (202), and the two mounting guide rails (101) are correspondingly arranged in parallel and are respectively connected with corresponding cleaning pieces.

10. The on-line hydraulic deashing system of the waste incineration exhaust-heat boiler according to claim 2, characterized in that: two rows of prefabricated pipelines (202) are connected to the top of the waste heat boiler, the mounting guide rails (101) are correspondingly U-shaped, and cleaning pieces are connected to the mounting guide rails.

Technical Field

The invention relates to an online hearth ash removal system, in particular to an online hydraulic ash removal system for a waste incineration exhaust-heat boiler.

Background

The waste incineration waste heat boiler is one of important devices for waste heat utilization, and the full guarantee of efficient and stable operation is particularly important. During the operation of the waste heat boiler, the ash deposition on the heating surface is a common phenomenon, the flow area of the flue gas side of the waste heat boiler can be reduced, the heat exchange thermal resistance of the heating surface of the waste heat boiler is increased, and finally the production capacity of the waste heat boiler is reduced; and because the municipal solid waste has complex and various components and high water content, the coke formed on the heat exchange surface in the incineration process has the characteristics of strong cohesiveness, strong corrosivity and the like.

However, in the prior art, the ash removal mode of steam ash removal has large one-time investment, dead corners are swept, the ash removal is incomplete, and the operation cost is high; the mechanical vibration ash removal has a certain adverse effect on the service life and strength of a boiler pipeline and a welded junction welding line; because the coking of the waste incineration has the characteristic of strong caking property, the purging effect is not ideal; the heat exchange tube corrosion and tube explosion and furnace shutdown can be caused seriously due to the incomplete cleaning of the coking and the accumulated ash of the waste incineration waste heat boiler, so that the great economic loss and the potential safety hazard are caused.

The patent of invention with publication number CN103134058A is disclosed by the Chinese intellectual Property office in 2013, 6.5.4, and is named as a remote hydraulic soot blower, which comprises a spray gun, a spray gun angle control system, a water pump, valves, a control cabinet and the like, cold water is used as a medium, and a hearth can be cleaned by nearly 500m once in work²In the coking of the area, when each hydraulic soot blower is installed, only a hole with a square of 0.4m needs to be formed in the water-cooled wall, and the water flow purging track is controlled by software design during soot blowing. However, the spray gun angle control system determines the soot blowing track of water flow sprayed on the water wall, and due to the fact that the two and three flues of the waste incineration waste heat boiler are provided with intermediate partitions and the like, the method is easy to have dead corners which cannot be cleaned, the cleaning efficiency is poor, and meanwhile the installation position is limited by the space of the water wall.

Disclosure of Invention

The invention aims to provide an online hydraulic ash removal system for a waste incineration waste heat boiler, which can efficiently clean accumulated ash and coke in a flue, is convenient to arrange, flexible to adjust and high in working efficiency, and saves the operation and maintenance cost.

The technical purpose of the invention is realized by the following technical scheme:

an online hydraulic ash removal system for a waste incineration waste heat boiler comprises a cleaning piece and a plurality of prefabricated pipelines, wherein the cleaning piece is connected with a first driving piece for driving the cleaning piece to transversely move, and the moving path of the cleaning piece passes through the upper part of each prefabricated pipeline; the lower end of the prefabricated pipeline is communicated to the boiler flue, and the prefabricated pipeline is provided with a cut-off valve for opening and closing;

the cleaning piece comprises a cleaning nozzle and a second driving piece, and the second driving piece drives the cleaning nozzle to move up and down in the prefabricated pipeline.

Furthermore, the first driving part comprises a mounting guide rail and a travelling mechanism moving along the mounting guide rail, and the cleaning part is connected below the travelling mechanism.

Furthermore, the second driving member comprises a winding drum and a hose, the winding drum is driven by the motor to rotate, the hose is wound on the winding drum, the cleaning nozzle is communicated with one end of the hose, and the other end of the hose is communicated with the cooling water supply system.

Furthermore, the cooling water supply system comprises a cold water pipeline communicated with the hose, a cooling water source is arranged at the outer end of the cold water pipeline, and a pressurizing water pump and a water inlet stop valve are arranged on the cold water pipeline.

Furthermore, the cold water pipeline is also provided with a water inlet flow regulating valve and a check valve, and after being pressurized by the pressurizing water pump, the cooling water flow is regulated by the water inlet flow regulating valve, so that the cleaning nozzle forms a water sprayer with water drops of preset size and momentum, and the sprayed water is sprayed to the water cooling wall of the hearth.

Furthermore, the top of the prefabricated pipeline is communicated with a compressed air pipeline, the outer end of the compressed air pipeline is communicated to a compressed air source, and an inlet stop valve for controlling opening and closing is arranged on the compressed air pipeline.

Furthermore, the prefabricated pipeline sequentially comprises a top pipeline, a middle pipeline and a bottom pipeline, the top pipeline is vertically connected to the top of the waste heat boiler, and the bottom pipeline is vertically arranged and extends into a flue of the waste heat boiler.

Furthermore, the included angle alpha between the middle pipeline and the vertical direction is less than or equal to 30 degrees.

Furthermore, the top of the waste heat boiler is connected with two rows of prefabricated pipelines, and the two mounting guide rails are correspondingly arranged in parallel and are respectively connected with corresponding cleaning pieces.

Furthermore, two rows of prefabricated pipelines are connected to the top of the waste heat boiler, the mounting guide rails are correspondingly U-shaped, and the cleaning pieces are connected to the mounting guide rails.

In conclusion, the invention has the following beneficial effects:

the invention can well solve the problems existing in the two-three flue dust deposition coking of the waste incineration exhaust-heat boiler, water is taken as a medium, water flow is jetted to the coke block on the water-cooled wall of the hearth to generate great temperature stress, so that the coke block is cracked, meanwhile, the water flow can permeate into the gap of the coke block and then is heated and evaporated, the vaporization speed is very high, and the coke block is rather similar to a micro explosion to loosen the coke block, and finally, the impact force of the water flow is utilized to wash away the coke block, so the soot blowing effect is good, the purging process is relatively uniform, and the influence on the water-cooled wall is small;

(1) the online hydraulic ash removal method takes water as a medium, the ash can be loosened by pressure generated when the water is violently vaporized in an ash gap due to the large temperature difference of the water relative to the ash, and the ash can be easily washed away because the momentum of water flow is much larger than that of steam;

(2) in the purging process, the water flow strokes are not different, purging is uniform, the cleaning effect is uniform, and the influence on the temperature of the surface of the water cooled wall is small;

(3) the blowing range is large, and one hydraulic soot blower can blow the furnace cavity to 400m²The water cooling walls of the second and third flues of the waste incineration waste heat boiler can be swept completely from top to bottom, the effect is far higher than that of a common soot blower, the system is greatly simplified, and the investment and the subsequent operation and maintenance cost are saved;

(4) the online hydraulic deashing method only needs to open a small round hole capable of extending into the cleaning nozzle at the furnace top of the waste heat boiler, is convenient to arrange and flexible to adjust, improves the usability of equipment, and has great flexibility in system arrangement;

(5) the purging speed is high, the purging time is short, and time-consuming manual cleaning is almost eliminated; the structure is simple, the performance is reliable, the failure rate is low, and the maintenance is easy.

(6) Because the coking generated by the waste incineration has the characteristics of strong cohesiveness, strong corrosivity and the like, the online hydraulic deashing method can effectively clean the coking of the water-cooled wall, improve the heat efficiency of the waste heat boiler, prevent the water-cooled wall from being excessively corroded by the coking, and prolong the service life of equipment.

Drawings

FIG. 1 is a schematic view of the structure of the traveling mechanism and the cleaning member part of the present invention;

FIG. 2 is a schematic structural view of the prefabricated pipe and the cleaning nozzle before and after movement;

FIG. 3 is a schematic view of an arrangement of a mounting rail and cleaning elements according to one embodiment;

fig. 4 is a schematic view of the arrangement of the mounting rail and the cleaning members in the second embodiment.

In the figure, 101, mounting a guide rail; 102. a traveling mechanism; 103. a winding drum; 104. a hose; 105. cleaning the nozzle; 106. a pressurized water pump; 107. a water inlet stop valve; 108. a water inlet flow regulating valve; 109. a check valve; 110. a cold water pipe; 201. a shut-off valve; 202. prefabricating a pipeline; 203. a compressed air conduit; 204. an inlet shutoff valve.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings, and the present embodiment is not to be construed as limiting the invention.

The first embodiment is as follows:

an online hydraulic ash removal system for a waste incineration exhaust-heat boiler is shown in fig. 1 and 2 and comprises a cleaning piece and a plurality of prefabricated pipelines 202 arranged in an array, wherein a first driving piece for driving the cleaning piece to transversely move is connected to the cleaning piece, and the moving path of the cleaning piece passes right above each prefabricated pipeline 202.

As shown in fig. 1, the first driving member includes a mounting rail 101 and a traveling mechanism 102 moving along the mounting rail 101, and the cleaning member is attached below the traveling mechanism 102. In this embodiment, the installation guide rail 101 includes a cross beam and a bottom plate welded at the bottom of the cross beam, the traveling mechanism 102 includes four traveling wheels abutted to the bottom plate, two traveling wheels are symmetrically disposed on two sides of the cross beam, the traveling mechanism 102 may be a standard electric trolley, or any traveling mechanism capable of moving along the adaptive guide rail, which is not described herein in detail.

As shown in fig. 1, the cleaning member includes a dedicated cleaning nozzle 105 (optionally a cylindrical nozzle or a fan nozzle) and a second driving member that drives the cleaning nozzle 105 up and down in the prefabricated duct 202;

the second driving part comprises a winding drum 103 and a special metal hose 104, the winding drum 103 is driven by a motor to rotate, the hose 104 is wound on the winding drum 103, the cleaning nozzle 105 is communicated with one end of the hose 104, the other end of the hose 104 is communicated with a cooling water supply system, one end of the hose 104, which is far away from the cleaning nozzle 105, can be wound outside the winding drum 103, and can also penetrate through the peripheral wall of the winding drum and extend out of the end part of the winding drum, so that the hose at the end is prevented from being wound outside the winding drum 103;

the cooling water supply system comprises a cooling water pipeline 110 communicated with the hose 104, the outer end of the cooling water pipeline 110 is connected with a cooling water source, the cooling water source is guided from desalted water or condensed water, a pressurizing water pump 106, a water inlet stop valve 107, a water inlet flow regulating valve 108 and a check valve 109 are sequentially arranged on the cooling water pipeline 110 from one side of the cooling water source, after the cooling water is pressurized by the pressurizing water pump 106, the outlet water pressure is 10bar, the cooling water flow is regulated by the water inlet flow regulating valve 108, so that the cleaning nozzle 105 forms a water sprayer with water drops of preset size and momentum, and the sprayed water is sprayed to the water cooling wall of the hearth;

the whole work uses cold water as a medium, pressurized water flow is jetted onto the coke block of the water-cooled wall of the hearth through the pressure pump, great temperature stress can be generated, the coke block is cracked, meanwhile, the water flow can permeate into gaps of the coke block and then is heated and evaporated, the vaporization speed is high, the coke block is equivalently a micro explosion, the coke block is loosened, and finally, the coke block is washed away by means of the impact force of the water flow. The cleaning nozzle 105 descends from the top to the bottom of the boiler, and the cold water flow covers all the water-cooled walls of the elevations in the range of the hydraulic soot blower, so that coke blocks on the water-cooled walls of the hearth of the waste heat boiler are removed, and the long-term safe and stable operation of the boiler is realized.

As shown in fig. 2, the prefabricated pipe 202 sequentially includes a top pipe, a middle pipe and a bottom pipe which are integrally connected, the top pipe is vertically connected to the top of the waste heat boiler, and the bottom pipe is vertically arranged downwards and extends into the flue of the waste heat boiler until reaching the heating surfaces of the corresponding two and three flues; a quick cut-off valve 201 for opening and closing is arranged on the top pipeline;

the included angle alpha between the middle pipeline and the vertical direction is less than or equal to 30 degrees, otherwise, the special cleaning nozzle 105 is jammed.

The top pipeline top intercommunication is located the compressed air pipeline 203 of trip valve 201 below, and compressed air pipeline 203 outer end communicates to the compressed air supply, and is equipped with the control inlet stop valve 204 (the electronic stop valve of compressed air inlet) that opens and close on the compressed air pipeline 203, and its compressed air mainly used prevents that the furnace flue gas from leaking, and because prefabricated pipeline 202 is longer, can also play the effect of cooling prefabricated pipeline 202.

The flue in the waste incineration waste heat boiler is sequentially divided into a first flue, a second flue and an upward third flue by a front wall, a front partition plate, a rear partition plate and a rear wall, wherein the first flue, the second flue and the third flue are connected end to form a snake-shaped channel; in order to clean the water wall of the second flue and the third flue, a guide rail 101 is respectively arranged right above the second flue and the third flue for cleaning;

in the embodiment, a single-row arrangement method is adopted, as shown in fig. 3, in the method, two long-strip-shaped steel structure rails (two rows of prefabricated pipelines 202) are installed at the top of the waste incineration waste heat boiler, and two hydraulic ash removal devices (cleaning parts) are simultaneously and respectively configured and connected, so that all pre-opened circular holes and the prefabricated pipelines 202 at the top of the waste incineration waste heat boiler can be covered by the two hydraulic ash removal devices in the travel of the two steel structure rails, and the ash removal requirements of two flues and three flues are met respectively.

Example two:

the structure of the present embodiment is substantially the same as that of the first embodiment, except that:

in the embodiment, a U-shaped arrangement method is adopted, as shown in fig. 4, two rows of prefabricated pipelines 202 are connected to the top of the waste heat boiler, a U-shaped steel structure rail (installation guide rail 101) is installed at the top of the waste heat boiler, and a hydraulic ash removal device (cleaning part) is configured and connected to ensure that the hydraulic ash removal device can cover all pre-opened circular holes and the prefabricated pipelines 202 at the top of the waste incineration waste heat boiler in the travel of the U-shaped steel structure rail, so that the ash removal requirements of two flues and three flues are sequentially met.

Compared with the first embodiment and the second embodiment, one more hydraulic ash removal device is needed, so that the cost is increased, but two hydraulic ash removal devices can work simultaneously, the working efficiency is higher than that of the second embodiment, and the actual installation and arrangement mode can be selected according to the field requirement.

In the two embodiments, only two rows of holes in the top of the waste incineration exhaust-heat boiler are taken as an example, and for the exhaust-heat boiler with more holes, the method is similar to that described above, the U-shaped arrangement can be changed into the S-shaped arrangement, and the description is omitted in the present invention.

The working principle is as follows:

the hydraulic soot blower is arranged at the top of a waste incineration waste heat boiler, a round small hole with the diameter of 200mm is formed in the corresponding position of the top of the waste incineration waste heat boiler, a prefabricated pipeline 202 and a quick cut-off valve 201 are arranged at the position of a hole formed in the top of the waste incineration waste heat boiler, and a compressed air pipeline 203 and an inlet cut-off valve 204 are connected to the top pipeline;

the automatic control from hole to hole can be realized, the cleaning piece is driven to move to a position corresponding to the opening when the corresponding hearth region needs to remove ash, the cleaning piece can be put into use, the special metal hose 104 provided with the special cleaning nozzle 105 is automatically recovered after the cleaning is finished, and the whole hydraulic soot blower automatically runs to the initial position.

When the cleaning piece is put into operation, the quick cut-off valve 201 is opened, the inlet cut-off valve 204 is opened at the same time, the special metal hose 104 provided with the special cleaning nozzle 105 enters from the prefabricated pipeline 202 and reaches the heating surface of the waste heat boiler according to a preset path, wherein the quick cut-off valve 201 and the inlet cut-off valve 204 are both connected to a DCS (distributed control system) and automatically controlled to be switched on and off;

after the special cleaning nozzle 105 enters the second flue and the third flue of the waste incineration waste heat boiler, the cooling water supply system starts to work, cooling water is pressurized by the pressurizing water pump 106 and reaches the special cleaning nozzle 105 through the special metal hose 104, cold water flow is emitted onto coke blocks on the water-cooled wall of the hearth to generate great temperature stress, the coke blocks are cracked and loosened, and finally the coke blocks are washed away by means of the impact force of the water flow. The whole process is carried out from top to bottom after the special cleaning nozzle 105 reaches the second flue and the third flue, and the cold water flow of the special cleaning nozzle 105 can cover all elevation water-cooled walls in the maximum blowing range, so that coke blocks on the corresponding furnace water-cooled walls are removed, and the requirement of cleaning the water-cooled walls is met.

Under abnormal working conditions such as the end of purging, too low water pressure, jamming of the special cleaning nozzle 105 and the like, the special cleaning nozzle 105 is quickly pulled up, and the whole process can be automatically or manually controlled.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.