阅读说明：本技术 一种管道式柴油机组消烟降温装置 (Smoke-eliminating and temperature-reducing device for pipeline type diesel engine unit ) 是由 李爱华 李辉 汪波 李庆辉 冯永保 陆宇婷 曹继平 李亚奇 于 2019-12-04 设计创作，主要内容包括：本发明属于烟气处理技术领域,具体涉及一种管道式柴油机组消烟降温装置,包括给水系统柜,给水系统柜上侧设有控制面板,给水系统柜下侧设有进水管、给水系统和出水管,出水管出口端连接有高压分水器,高压分水器出口端连接有高压水管,高压水管连接有第一U形管,第一U型管上侧设有子降温管道,子降温管道均焊接有喷管,喷管固定连接有离心式雾化喷嘴,喷管贯穿子降温管道连接有固定座,固定座与第一U形管固定连接,子降温管道内部设有排水孔,排水孔固定连接有第一排水管,第一排水管设有手动球阀,降温管道一侧固定连接有汽水分离器,汽水分离器设有第二排水管,第汽水分离器法兰连接有排烟管道。(The invention belongs to the technical field of flue gas treatment, and particularly relates to a smoke abatement and temperature reduction device of a pipeline type diesel engine unit, which comprises a water supply system cabinet, wherein a control panel is arranged on the upper side of the water supply system cabinet, a water inlet pipe, a water supply system and a water outlet pipe are arranged on the lower side of the water supply system cabinet, the outlet end of the water outlet pipe is connected with a high-pressure water separator, the outlet end of the high-pressure water separator is connected with a high-pressure water pipe, the high-pressure water pipe is connected with a first U-shaped pipe, a sub-temperature reduction pipeline is arranged on the upper side of the first U-shaped pipe, spray pipes are welded with spray pipes, the spray pipes are fixedly connected with centrifugal atomizing nozzles, the spray pipes penetrate through the sub-temperature reduction pipeline and are connected with a fixed seat, the fixed seat is, the second steam-water separator is connected with a smoke exhaust pipeline through a flange.)

1. The utility model provides a pipeline formula diesel engine set smoke abatement heat sink, includes water supply system cabinet (1), water supply system cabinet (1) upside is equipped with control panel (11), water supply system cabinet (1) downside is equipped with cabinet door (12) all around, water supply system cabinet (1) downside is equipped with inlet tube (13), water supply system and outlet pipe (14), its characterized in that: the smoke-removing device is characterized in that the outlet end of the water outlet pipe (14) is connected with a high-pressure water distributor (21), the outlet end of the high-pressure water distributor (21) is connected with a plurality of groups of high-pressure water pipes (22), each group of high-pressure water pipes (22) comprises two adjacent high-pressure water pipes (22), each high-pressure water pipe (22) is connected with a first U-shaped pipe (23), a plurality of sub-cooling pipelines (31) corresponding to each group of high-pressure water pipes (22) are arranged on the upper side of each first U-shaped pipe (23), the sub-cooling pipelines (31) are connected into a whole cooling pipeline (5), a spray pipe (311) matched with the first U-shaped pipe (23) is welded on each sub-cooling pipeline (31), an atomizing nozzle (312) is fixedly connected with each spray pipe (311), the direction of the centrifugal atomizing nozzle (312) is opposite to the smoke inlet direction of each sub-cooling pipeline (31), and the, the fixed seat (313) is fixedly connected with the flange of the first U-shaped pipe (23), one side inside the sub cooling pipeline (31) is longitudinally provided with a plurality of drain holes (32) side by side, a first drainage pipe (321) is fixedly connected with the lower side of the drainage hole (32), the outlet end of the first drainage pipe (321) is communicated into a whole and then connected with a manual ball valve (322), the manual ball valve (322) is connected with a second U-shaped pipe (33), the outlet end of the second U-shaped pipe (33) is connected with a recovery water tank (41), one side of the integral cooling pipeline (5) is fixedly connected with a steam-water separator (34), a second drain pipe (341) is arranged at the lower side of the steam-water separator (34), the second drain pipe (341) is connected with a third U-shaped pipe (342), the outlet end of the third U-shaped pipe (342) is fixedly connected with a recovery water tank (41), and the steam-water separator (34) is connected with a smoke exhaust pipeline (35) in a flange mode.

2. The smoke abatement and temperature reduction device for the pipeline diesel engine unit as claimed in claim 1, wherein: the sub cooling pipelines (311) are fixedly connected into a whole by flanges.

3. The smoke abatement and temperature reduction device for the pipeline diesel engine unit as claimed in claim 1, wherein: one end of the steam-water separator (34) is connected with the integral cooling pipeline (5) through a flange, and the other end of the steam-water separator (34) is connected with the smoke exhaust pipeline (35) through a flange.

4. The smoke abatement and temperature reduction device for the pipeline diesel engine unit as claimed in claim 1, wherein: and asbestos gaskets are arranged at the joints of the flanges.

5. The smoke abatement and temperature reduction device for the pipeline diesel engine unit as claimed in claim 1, wherein: the whole cooling pipeline (5) is provided with temperature sensors at the smoke inlet and the smoke exhaust pipeline (35), and the temperature sensors are in signal connection with the control panel (11).

6. The smoke abatement and temperature reduction device for the pipeline diesel engine unit as claimed in claim 1, wherein: the high-pressure water pipe (22) is provided with a switch ball valve (221) and an electric stop valve (222).

7. The smoke abatement and temperature reduction device for the pipeline diesel engine unit as claimed in claim 1, wherein: the second U-shaped pipe (33) and the third U-shaped pipe (342) are fixedly connected with the recovery water tank through joints.

8. The smoke abatement and temperature reduction device for the pipeline diesel engine unit as claimed in claim 1, wherein: the smoke exhaust pipeline (35) is provided with an elbow (351).

9. The smoke abatement and temperature reduction device for the pipeline diesel engine unit as claimed in claim 1, wherein: the recovery water tank (41) is provided with a drain pipe (411), and the drain pipe (411) is provided with a switch valve (412).

10. The smoke abatement and temperature reduction device for the pipeline diesel engine unit as claimed in claim 1, wherein: the first smoke exhaust pipeline (41) is made of 316L stainless steel materials and is formed by welding 3mm stainless steel plate coiled pipes.

Technical Field

The invention belongs to the technical field of flue gas treatment, and particularly relates to a smoke abatement and temperature reduction device for a pipeline type diesel engine unit.

Background

The diesel generator set is a power generation device using diesel as main fuel, and is a mechanical device which uses a diesel engine as a motive power to drive a generator (namely an electric ball) to generate power and convert kinetic energy into electric energy and heat energy. When the diesel generating set works, a large amount of high-heat smoke is discharged, and meanwhile, partial carbon particles, harmful gases and the like are attached to the smoke, in view of the harm of the substances to the environment and human health, the smoke must be purified before being discharged into the atmosphere, so that the smoke reaches the discharge standard, and the smoke treatment and the smoke discharge requirements become important factors influencing the waste incineration treatment economy and the environmental influence.

The basic principle of smoke abatement and temperature reduction of high-pressure water mist is that cooling water is pressurized to dozens to hundreds of atmospheric pressures by utilizing the mechanism that high-pressure water flow can be rapidly atomized when passing through narrow holes, and then is atomized at high speed by a reducing microporous nozzle to form a large amount of fine water droplets (water mist) with the particle size of 10-100 mu m, the surface area of the water droplets is increased by nearly ten thousand times, the water droplets are rapidly vaporized after encountering high-temperature flue gas, and absorb a large amount of heat of the flue gas, so that the temperature of the high-temperature flue gas is rapidly reduced, meanwhile, the water mist also has a washing effect on the flue gas, and carbon particles, harmful gases and the fine water.

The existing water mist smoke abatement cooling device mostly adopts the same nozzle direction and flue gas emission direction, so that the flue gas can take away water vapor more easily to cause the overlarge humidity of the flue gas, the cooling effect is unsatisfactory, a large amount of water is required to be used, and meanwhile, the water vapor in condensed water and the flue gas is not subjected to a specific recovery method, so that the waste of water resources is caused.

Disclosure of Invention

The purpose of the invention is: aims to provide a smoke abatement and temperature reduction device of a pipeline type diesel engine unit, which solves the problems that the humidity of the smoke exhausted by the existing water mist smoke abatement and temperature reduction device is large, the water consumption is large and condensed water and water vapor can not be recycled.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

a smoke abatement and temperature reduction device for a pipeline type diesel engine set comprises a water supply system cabinet, wherein a control panel is arranged on the upper side of the water supply system cabinet, cabinet doors are arranged on the periphery of the lower side of the water supply system cabinet, a water inlet pipe, a water supply system and a water outlet pipe are arranged on the lower side of the water supply system cabinet, the outlet end of the water outlet pipe is connected with a high-pressure water separator, the outlet end of the high-pressure water separator is connected with a plurality of groups of high-pressure water pipes, each group of high-pressure water pipes comprises two adjacent high-pressure water pipes, the high-pressure water pipes are connected with a first U-shaped pipe, a plurality of sub-temperature reduction pipelines corresponding to each group of high-pressure water pipes are arranged on the upper side of the first U-shaped pipe, the sub-temperature reduction pipelines are connected with each other to form an integral temperature reduction pipeline, the spray pipe runs through sub-cooling pipe connection and has a fixing base, fixing base and first U-shaped pipe flange fixed connection, the inside one side of sub-cooling pipe vertically is equipped with a plurality of wash ports side by side, the first drain pipe of wash port downside fixedly connected with, first drain pipe outlet end intercommunication is connected with manual ball valve after whole, manual ball valve is connected with second U type pipe, second U type pipe outlet end is connected with the recovery water tank, whole cooling pipe one side fixedly connected with catch water, the catch water downside is equipped with the second drain pipe, the second drain pipe is connected with third U type pipe, third U type pipe outlet end and recovery water tank fixed connection, catch water flange joint has exhaust pipe.

By adopting the technical scheme of the invention, the control panel can control the water supply system to operate and stop; the cabinet door can protect the water supply system cabinet; the water inlet pipe is externally connected with the water tank, water can be pressurized by the water supply system of the water supply system cabinet, and then the water flows out through the water outlet pipe; the high-pressure water separator can respectively send high-pressure water to the high-pressure water pipes; the first U-shaped pipe is arranged, so that water can be prevented from flowing backwards under the action of water pressure; the high-pressure water pipe is connected with the first U-shaped pipe, and the fixed seat is fixedly connected with the first U-shaped pipe flange, so that the first U-shaped pipe can be conveniently detached and installed; the cooperation of the spray pipe and the centrifugal atomizing nozzle can enable the high-pressure water pipe to send water into the spray pipe through the first U-shaped pipe and spray the water out through the centrifugal atomizing nozzle to reduce the temperature; the nozzle of the centrifugal atomizing nozzle faces to the direction opposite to the smoke inlet direction of the sub-cooling pipeline, so that the fine water mist sprayed out of the centrifugal atomizing nozzle is opposite to the smoke inlet direction, and the high-temperature smoke and the fine water mist perform reverse heat exchange; condensed water in each sub-cooling pipeline can be recycled and enter the recycling water tank through the first water discharging pipe and the second U-shaped pipe through the water discharging hole; a plurality of water drainage holes are longitudinally arranged in parallel, so that water in the sub cooling pipeline can be drained quickly, and the phenomenon that the pipeline is corroded quickly due to accumulated water caused by too slow drainage is avoided; the second U-shaped pipe can prevent water in the recovery water tank from flowing backwards to enter the sub cooling pipeline; the water vapor attached to the flue gas can be separated out through the steam-water separator, discharged through the second water discharge pipe and enters the recovery water tank through the third U-shaped pipe; the third U-shaped pipe can prevent water from flowing backwards to enter the steam-water separator; the cooled flue gas can be discharged through a smoke discharge pipeline; the manual ball valve can manually control the opening and closing state of the first drainage pipe;

when the device is used, a smoke exhaust pipeline of a diesel engine set is connected with an integral cooling pipeline through a flange, the work of a water supply system is controlled through a control panel, high-pressure water is conveyed to a high-pressure water separator and is distributed to high-pressure water pipes through the high-pressure water separator, the high-pressure water carries out reverse heat exchange through a spray pipe and a centrifugal atomizing nozzle to reduce the temperature of smoke, meanwhile, a manual ball valve is opened, water after heat exchange of the sub cooling pipelines is discharged into a recovery water tank, water vapor attached to the smoke is separated out by a vapor-water separator and enters the recovery water tank, and finally, after the device stops running, condensed water in the sub cooling pipelines is discharged into the recovery water;

the invention solves the problems that the humidity of the smoke discharged by the existing water mist smoke abatement and temperature reduction device is large, the water consumption is large, and condensed water and water vapor cannot be recycled.

Further limiting, the sub cooling pipelines are fixedly connected into a whole through flanges. By adopting the structure, the sub cooling pipeline can be conveniently detached and installed.

Further limiting, one end of the steam-water separator is connected with the integral cooling pipeline through a flange, and the other end of the steam-water separator is connected with the smoke exhaust pipeline through a flange. By adopting the structure, the steam-water separator can be conveniently mounted and dismounted, and the steam-water separator can be conveniently maintained and replaced.

Further limit, all flange joint all is equipped with the asbestos gasket. With such a structure, the sealing performance of each flange connection joint can be better.

Further inject, whole cooling pipe advances cigarette department and exhaust pipe all is equipped with temperature sensor, temperature sensor and control panel signal connection. By adopting the structure, people can monitor the temperature before smoke temperature reduction and smoke elimination and the temperature after smoke temperature reduction and smoke elimination in real time, and can conveniently compare the temperature change before and after smoke temperature reduction and smoke elimination and check whether the temperature requirement of smoke emission is met.

Further inject, the high pressure water pipe is equipped with switch ball valve and electronic stop valve, electronic stop valve is connected with control panel electricity. The structure is convenient for remote control and management of the high-pressure water pipe.

Further limiting, the second U-shaped pipe and the third U-shaped pipe are fixedly connected with the recovery water tank through joints. By adopting the structure, the second U-shaped pipe and the third U-shaped pipe can be detached and installed, and are convenient to replace and maintain.

Further limiting, the smoke exhaust pipeline is provided with an elbow. By adopting the structure, rainwater can be prevented from falling into the smoke exhaust pipeline to cause corrosion. .

Further inject, the recovery water tank is equipped with the drain pipe, the drain pipe is equipped with the ooff valve. With the structure, the water in the recovery water tank can be led out for other use by opening the switch valve.

Further limiting, each sub-cooling pipeline is made of 316L stainless steel materials and is welded and formed by adopting a 3mm stainless steel plate coiled pipe. By adopting the structure, the corrosion of high-temperature flue gas and acidic substances in the cooling process to the first exhaust pipeline can be avoided.

Compared with the prior art, the invention has the following advantages:

1. the centrifugal atomizing nozzle generates a liquid film by utilizing centrifugal force generated by high-pressure water through the rotational flow device, the liquid film is crushed by air and atomized, the water mist is good in uniformity and large in density, the diameter of the water mist is less than 10-100 mu m, the flow resistance loss is less, and the centrifugal atomizing nozzle has larger initial kinetic energy and better diffuse cooling effect; the direction of the nozzle of the centrifugal atomizing nozzle is opposite to the smoke discharging direction of the first smoke discharging pipeline, and carbon particles and harmful gas in the smoke are washed.

2. Can retrieve the condensate water of cooling in-process to cistern and catch water can retrieve the steam that contains the area in the flue gas and get into the cistern.

3. The water is filtered in two stages before being pumped into the water storage tank, so that impurities in the water are prevented from blocking a nozzle; the pipeline of the system is made of stainless steel pipes, so that the pressure-bearing type is high; the flange connection between each part and the pipeline is convenient for installation, protection and maintenance.

Drawings

The invention is further illustrated by the non-limiting examples given in the accompanying drawings;

FIG. 1 is a schematic structural diagram of an embodiment of a smoke abatement and temperature reduction device of a pipeline diesel engine unit according to the present invention;

FIG. 2 is an enlarged schematic view of the structure of the smoke abatement and temperature reduction device of the pipeline diesel engine unit in the embodiment A of the invention;

FIG. 3 is an enlarged schematic view of the structure of the pipe-type diesel engine set smoke abatement and temperature reduction device in the embodiment B of the invention;

FIG. 4 is an enlarged schematic view of the structure of the pipe-type diesel engine unit smoke abatement cooling device of the embodiment C of the invention;

FIG. 5 is a schematic view of a partial cross-sectional structure of a cooling pipe of an embodiment of the smoke abatement and temperature reduction device for a pipeline diesel engine unit according to the present invention;

FIG. 6 is an enlarged schematic view of a cooling pipe of an embodiment of the smoke abatement cooling device for a pipeline diesel engine unit according to the present invention, the structure of which is shown at a partial section D;

the main element symbols are as follows:

the water supply system comprises a water supply system cabinet 1, a control panel 11, a cabinet door 12, a water inlet pipe 13, a water outlet pipe 14, a high-pressure water separator 21, a high-pressure water pipe 22, a switch ball valve 221, an electric stop valve 222, a first U-shaped pipe 23, a sub-cooling pipeline 31, a spray pipe 311, a centrifugal atomizing nozzle 312, a fixed seat 313, a water discharge hole 32, a first water discharge pipe 321, a manual ball valve 322, a second U-shaped pipe 33, a steam-water separator 34, a second water discharge pipe 341, a third U-shaped pipe 342, a smoke discharge pipeline 35, an elbow 351, a recovery water tank 41, a water discharge pipe 411, a switch.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

As shown in fig. 1-6, the smoke abatement and temperature reduction device for a pipeline type diesel engine set of the present invention comprises a water supply system cabinet 1, a control panel 11 is disposed on the upper side of the water supply system cabinet 1, cabinet doors 12 are disposed around the lower side of the water supply system cabinet 1, a water inlet pipe 13, a water supply system and a water outlet pipe 14 are disposed on the lower side of the water supply system cabinet 1, an outlet end of the water outlet pipe 14 is connected with a high pressure water separator 21, an outlet end of the high pressure water separator 21 is connected with a plurality of groups of high pressure water pipes 22, each group of high pressure water pipes 22 includes two adjacent high pressure water pipes 22, the high pressure water pipes 22 are connected with a first U-shaped pipe 23, a plurality of sub-temperature reduction pipelines 31 corresponding to each group of high pressure water pipes 22 are disposed on the upper side of the first U-shaped pipe 23, the sub-temperature reduction pipelines 31 are, the nozzle orientation of the centrifugal atomizing nozzle 312 is opposite to the smoke inlet direction of the sub-cooling pipeline 31, the spray pipe 311 penetrates through the sub-cooling pipeline 31 and is connected with a fixed seat 313, the fixed seat 313 is fixedly connected with a flange of a first U-shaped pipe 23, one side inside the sub-cooling pipeline 31 is longitudinally provided with a plurality of drain holes 32 side by side, a first drain pipe 321 is fixedly connected to the lower side of each drain hole 32, the outlet end of each first drain pipe 321 is communicated into a whole and then is connected with a manual ball valve 322, the manual ball valve 322 is connected with a second U-shaped pipe 33, the outlet end of each second U-shaped pipe 33 is connected with a recovery water tank 41, a steam-water separator 34 is fixedly connected to one side of the whole cooling pipeline 5, a second drain pipe 341 is arranged on the lower side of the steam-water separator 34, the second drain.

By adopting the technical scheme of the invention, the control panel 11 can control the water supply system to operate and stop; the cabinet door 12 can protect the water supply system cabinet 1; the water inlet pipe 13 is externally connected with a water tank, water can be pressurized through a water supply system of the water supply system cabinet 1, and then the water flows out through the water outlet pipe 14; the high-pressure water separator 21 can send high-pressure water to the high-pressure water pipes 22 respectively; the first U-shaped pipe 23 is arranged, so that water can be prevented from flowing backwards under the action of water pressure; the high-pressure water pipe 22 is connected with the first U-shaped pipe 23, and the fixed seat 313 is fixedly connected with the first U-shaped pipe 23 through a flange, so that the first U-shaped pipe 23 can be conveniently detached and installed; the cooperation of the spray pipe 311 and the centrifugal atomizing nozzle 312 enables the high-pressure water pipe 22 to send water into the spray pipe 311 through the first U-shaped pipe 23 and spray the water out through the centrifugal atomizing nozzle 312 for cooling; the nozzle of the centrifugal atomizing nozzle 312 faces the direction opposite to the smoke inlet direction of the sub-cooling pipeline 31, so that the fine water mist sprayed out of the centrifugal atomizing nozzle 312 is opposite to the smoke inlet direction, and the high-temperature smoke and the fine water mist perform reverse heat exchange; the condensed water in each sub cooling down pipe 31 can be recovered into the recovery water tank 41 through the second U-shaped pipe 33 by the first water discharge pipe 321 through the water discharge hole 32; a plurality of drain holes 32 are longitudinally arranged in parallel, so that water in the sub cooling pipeline 31 can be drained quickly, and the phenomenon that the pipeline is corroded quickly due to accumulated water in the sub cooling pipeline caused by too slow drainage is avoided; the second U-shaped pipe 33 can prevent the water in the recovery water tank 41 from flowing backwards into the sub cooling pipeline 31; the water and vapor attached to the flue gas can be separated and separated out by the steam-water separator 34, discharged through the second drain pipe 341, and enters the recovery water tank 41 through the third U-shaped pipe 342; the third U-shaped pipe 342 can prevent water from flowing backward into the steam-water separator 34; the cooled flue gas can be discharged through the smoke discharge pipe 35; the manual ball valve 322 can manually control the open/close state of the first drain pipe 321;

when the device is used, a smoke exhaust pipeline of a diesel engine set is in flange connection with the integral cooling pipeline 5, the control panel 11 controls the work of a water supply system and transmits high-pressure water to the high-pressure water separator 21, the high-pressure water is distributed to each high-pressure water pipe 22 through the high-pressure water separator 21, the high-pressure water carries out reverse heat exchange through the centrifugal atomizing nozzle 312 through the spray pipe 311 to reduce the temperature of smoke, meanwhile, the manual ball valve 322 is opened, water after heat exchange of each sub cooling pipeline 31 is discharged into the recovery water tank 41, the steam-water separator 34 separates out water vapor attached to the smoke into the recovery water tank 41, and finally, after the device stops running, condensed water in each sub cooling pipeline 31 is discharged into the recovery water tank 41;

the invention solves the problems that the humidity of the smoke discharged by the existing water mist smoke abatement and temperature reduction device is large, the water consumption is large, and condensed water and water vapor cannot be recycled.

Preferably, the sub cooling pipes 311 are fixedly connected into a whole by flanges. With such a structure, the sub cooling duct 311 can be easily detached and installed. In fact, it is also possible to fixedly connect the sub cooling pipes 311 into a whole by welding according to the circumstances.

Preferably, one end of the steam-water separator 34 is connected with the integral cooling pipeline 5 through a flange, and the other end of the steam-water separator 34 is connected with the smoke exhaust pipeline 35 through a flange. With such a structure, the steam-water separator 34 can be conveniently mounted and dismounted, and the steam-water separator can be conveniently maintained and replaced. In fact, other methods such as welding can be used to fixedly connect the two ends of the steam-water separator 34 with the integral cooling duct 5 and the smoke exhaust duct 35, respectively, according to the situation.

Preferably, each flange joint is provided with an asbestos gasket. With such a structure, the sealing performance of each flange connection joint can be better. In fact, other ways of sealing the flange joint may be used as appropriate.

Preferably, the smoke inlet of the integral cooling pipeline 5 and the smoke exhaust pipeline 35 are both provided with temperature sensors, and the temperature sensors are in signal connection with the control panel 11. By adopting the structure, people can monitor the temperature before smoke temperature reduction and smoke elimination and the temperature after smoke temperature reduction and smoke elimination in real time, and can conveniently compare the temperature change before and after smoke temperature reduction and smoke elimination and check whether the temperature requirement of smoke emission is met. In fact, other devices capable of conveniently comparing the temperature changes before and after the temperature change can be used according to the situation.

Preferably, the high pressure water pipe 22 is provided with an on-off ball valve 221 and an electric shutoff valve 222, and the electric shutoff valve 222 is electrically connected to the control panel 11. Such a configuration facilitates remote control and management of high pressure water line 22. In fact, other valves may be used to remotely control and manage the high pressure water line 22, as the case may be.

Preferably, the second U-shaped pipe 33 and the third U-shaped pipe 342 are fixedly connected with the recovery water tank through joints. With such a structure, the second U-shaped pipe 33 and the third U-shaped pipe 342 can be detached and installed, and replacement and maintenance are facilitated. In fact, other means may be used to enable the second U-shaped pipe 33 and the third U-shaped pipe 342 to be detached and attached, as the case may be.

Preferably, the flue gas exhaust duct 35 is provided with an elbow 351. With the structure, rainwater can be prevented from falling into the smoke exhaust pipeline 35 to cause corrosion. In fact, other structures can be used as appropriate to enable the smoke exhaust duct 35 to prevent rain water from falling in.

Preferably, the recovery water tank 41 is provided with a drain pipe 411, and the drain pipe 411 is provided with an on-off valve 412. With this structure, the water in the recovery tank 41 can be led out for other purposes by opening the on-off valve 412. In fact, other ways can be used to lead the water in the recovery water tank 41 for other purposes according to the situation.

Preferably, each sub cooling pipe 31 is made of 316L stainless steel material and is welded and formed by a 3mm stainless steel plate reel pipe. With the structure, the corrosion of high-temperature flue gas and acidic substances in the cooling process to the sub cooling pipelines 31 can be avoided. In fact, other materials meeting the requirement of avoiding corrosion may be used to fabricate the sub cooling pipe 31 according to the circumstances.

The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.