阅读说明：本技术 一种利于碳中和电解烟气的余热利用及烟气净化系统 (Waste heat utilization and flue gas purification system beneficial to carbon neutralization and electrolysis of flue gas ) 是由 刘东燕 于 2021-09-22 设计创作，主要内容包括：本发明提供一种利于碳中和电解烟气的余热利用及烟气净化系统,涉及烟气净化处理技术领域,包括余热回收桶；所述余热回收桶外侧开设有进烟口,且换热铜管呈竖直状安装在余热回收桶内部；所述承接槽与余热回收桶底部相连通,且承接槽通过三菱柱与刮块相连；所述四通进烟管安装在余热回收桶顶部,且四通进烟管两端分别通过长螺栓与四通排烟管两端相连；所述净化管上下两端分别与四通进烟管和四通排烟管相连通,且净化管外侧连接有排污管；本发明当导热液经进液口进入换热通道内部,高温烟气通过换热铜管对换热通道内部流通的导热液进行加热,使加热后的导热液经排液口流入外部余热发电设备内,提升烟气内部余热利用效果。(The invention provides a waste heat utilization and flue gas purification system beneficial to carbon neutralization and electrolysis of flue gas, which relates to the technical field of flue gas purification treatment and comprises a waste heat recovery barrel; a smoke inlet is formed in the outer side of the waste heat recovery barrel, and the heat exchange copper pipe is vertically arranged inside the waste heat recovery barrel; the bearing groove is communicated with the bottom of the waste heat recovery barrel and is connected with the scraping block through a triangular prism; the four-way smoke inlet pipe is arranged at the top of the waste heat recovery barrel, and two ends of the four-way smoke inlet pipe are respectively connected with two ends of the four-way smoke exhaust pipe through long bolts; the upper end and the lower end of the purification pipe are respectively communicated with the four-way smoke inlet pipe and the four-way smoke exhaust pipe, and the outer side of the purification pipe is connected with a sewage discharge pipe; according to the invention, when the heat-conducting liquid enters the heat exchange channel through the liquid inlet, high-temperature flue gas heats the heat-conducting liquid circulating in the heat exchange channel through the heat exchange copper pipe, so that the heated heat-conducting liquid flows into external waste heat power generation equipment through the liquid outlet, and the utilization effect of waste heat in the flue gas is improved.)

1. The utility model provides a do benefit to waste heat utilization and flue gas purification system of carbon neutralization electrolysis flue gas which characterized in that: comprises a waste heat recovery barrel (1);

a smoke inlet (101) is formed in the outer side of the waste heat recovery barrel (1), and the heat exchange copper pipe (2) is vertically arranged inside the waste heat recovery barrel (1);

the bearing groove (3), the bearing groove (3) is communicated with the bottom of the waste heat recovery barrel (1), and the bearing groove (3) is connected with the scraping block (5) through a triangular prism (4);

the four-way smoke inlet pipe (6) is arranged at the top of the waste heat recovery barrel (1), and two ends of the four-way smoke inlet pipe (6) are connected with two ends of a four-way smoke exhaust pipe (13) through long bolts (10) respectively;

the upper end and the lower end of the purification pipe (7) are respectively communicated with the four-way smoke inlet pipe (6) and the four-way smoke exhaust pipe (13), and the outer side of the purification pipe (7) is connected with a sewage discharge pipe (12);

the spraying pipe support (8), spraying pipe support (8) is linked together with inlet tube (11), and inlet tube (11) are located the purge tube (7) outside.

2. The system for utilizing the waste heat of the carbon-neutralized electrolytic flue gas and purifying the flue gas as claimed in claim 1, wherein: the waste heat recovery barrel (1) is internally provided with an up-down bent heat exchange channel (103), the outer side of the waste heat recovery barrel (1) is respectively provided with a liquid inlet (104) and a liquid outlet (105), and the upper end and the lower end of the heat exchange channel (103) are respectively communicated with the liquid inlet (104) and the liquid outlet (105).

3. The system for utilizing the waste heat of the carbon-neutralized electrolytic flue gas and purifying the flue gas as claimed in claim 2, wherein: waste heat recovery bucket (1) is inside to be the equidistance and arranges form and installs heat transfer copper pipe (2), and inside heat transfer copper pipe (2) run through in heat transfer passageway (103), both ends are linked together with waste heat recovery bucket (1) inside upper and lower both ends respectively about heat transfer copper pipe (2).

4. The system for utilizing the waste heat of the carbon-neutralized electrolytic flue gas and purifying the flue gas as claimed in claim 1, wherein: the heat exchange copper pipe (2) is of a six-mango star-shaped structure.

5. The system for utilizing the waste heat of the carbon-neutralized electrolytic flue gas and purifying the flue gas as claimed in claim 1, wherein: accept groove (3) and be located waste heat recovery bucket (1) bottom, accept inside the arranging form of groove (3) and install rhombus post (4), rhombus post (4) slides and pegs graft in heat transfer copper pipe (2), and rhombus post (4) top is connected with scrapes piece (5), scrapes piece (5) cross section and heat transfer copper pipe (2) shape the same, scrapes piece (5) and is located waste heat recovery bucket (1) top, scrapes piece (5) sliding connection inside heat transfer copper pipe (2).

6. The system for utilizing the waste heat of the carbon-neutralized electrolytic flue gas and purifying the flue gas as claimed in claim 5, wherein: clamping holes (106) are formed in two ends of the bottom of the waste heat recovery barrel (1) respectively, knobs (301) are rotated at two ends of the top of the receiving groove (3) respectively, and the knobs (301) are attached to the top sides of the clamping holes (106) in a rotating mode.

7. The system for utilizing the waste heat of the carbon-neutralized electrolytic flue gas and purifying the flue gas as claimed in claim 1, wherein: an exhaust port (102) is formed in the top of the waste heat recovery barrel (1), the exhaust port (102) is communicated with three purification pipes (7) through a four-way smoke inlet pipe (6), a spraying pipe frame (8) is installed at the top of each purification pipe (7), and a spray head (801) is installed at the bottom of each spraying pipe frame (8).

8. The system for utilizing the waste heat of the carbon-neutralized electrolytic flue gas and purifying the flue gas as claimed in claim 7, wherein: the inner side of the bottom of the purifying pipe (7) is provided with a flow guide ring groove (701), a top baffle (702) is arranged right above the top of the flow guide ring groove (701), the top baffle (702) is positioned at the bottom of the spray pipe frame (8), the inner diameter of the flow guide ring groove (701) is smaller than the outer diameter of the top baffle (702), and the flow guide ring groove (701) is communicated with the heat exchange copper pipe (2).

9. The system for utilizing the waste heat of the carbon-neutralized electrolytic flue gas and purifying the flue gas as claimed in claim 7, wherein: purifying tube (7) internally mounted has splashproof piece (9), and splashproof piece (9) are inside honeycomb, and splashproof piece (9) top is outer convex spherical surface structure, and splashproof piece (9) top is concave spherical surface structure, and splashproof piece (9) are located and spray pipe support (8) bottom, and top baffle (702) are located splashproof piece (9) bottom.

Technical Field

The invention belongs to the technical field of flue gas purification treatment, and particularly relates to a waste heat utilization and flue gas purification system beneficial to carbon neutralization and electrolysis of flue gas.

Background

Carbon neutralization means that enterprises, groups or individuals measure and calculate the total amount of greenhouse gas emission generated directly or indirectly within a certain time, the emission amount of carbon dioxide generated by the enterprises, groups or individuals is offset through the forms of afforestation, energy conservation, emission reduction and the like, the zero emission of the carbon dioxide is realized, and after the carbon neutralization of flue gas and the electrolysis treatment, the flue gas easily contains a small amount of harmful substances, and the flue gas is generally required to be further purified so as to reach the emission standard.

The purification system of carbon neutralization electrolysis flue gas can refer to patent CN103463904B, and it mainly includes and is provided with the flue gas purification pipeline of drawing the flue gas downwards beside the outlet flue, and "U" venturi tube and outlet flue intercommunication are passed through to the upper end of flue gas purification pipeline, through down in draught fan with flue gas top-down introduction flue gas purification pipeline, wash the bottom to the flue gas purification pipeline with the dust particle in the flue gas through the trickle again, and the flue gas through elementary purification again through returning shape purge tube washs once more, thoroughly realizes dust removal purification.

When the existing similar carbon neutralization electrolysis flue gas purification system is used, the function is slightly simplified, the heat energy contained in the flue gas is difficult to be fully recycled when the flue gas is subjected to purification treatment, a direct external discharge operation mode is usually adopted, the heat energy contained in the flue gas is easily wasted, and the loss is caused to enterprises.

Disclosure of Invention

In order to solve the technical problems, the invention provides a waste heat utilization and flue gas purification system beneficial to carbon neutralization and electrolysis of flue gas, which aims to solve the problems that when the existing similar carbon neutralization and electrolysis flue gas purification system is used, the function is slightly simplified, the flue gas purification treatment is difficult, the heat energy contained in the flue gas is fully reused, a direct-discharge operation mode is usually adopted, the heat energy contained in the flue gas is easily wasted, and the loss is caused to enterprises.

The invention relates to a system for utilizing waste heat of carbon-neutralized electrolytic flue gas and purifying the flue gas, which has the advantages that the system is realized by the following specific technical means:

a waste heat utilization and flue gas purification system beneficial to carbon neutralization and electrolysis of flue gas comprises a waste heat recovery barrel;

a smoke inlet is formed in the outer side of the waste heat recovery barrel, and the heat exchange copper pipe is vertically arranged inside the waste heat recovery barrel;

the bearing groove is communicated with the bottom of the waste heat recovery barrel and is connected with the scraping block through a triangular prism;

the four-way smoke inlet pipe is arranged at the top of the waste heat recovery barrel, and two ends of the four-way smoke inlet pipe are respectively connected with two ends of the four-way smoke exhaust pipe through long bolts;

the upper end and the lower end of the purification pipe are respectively communicated with the four-way smoke inlet pipe and the four-way smoke exhaust pipe, and the outer side of the purification pipe is connected with a sewage discharge pipe;

the spraying pipe support is communicated with the water inlet pipe, and the water inlet pipe is positioned outside the purifying pipe.

Further, the waste heat recovery barrel is internally provided with an upper and lower bent heat exchange channel, the outer side of the waste heat recovery barrel is respectively provided with a liquid inlet and a liquid outlet, and the upper end and the lower end of the heat exchange channel are respectively communicated with the liquid inlet and the liquid outlet.

Further, the heat exchange copper pipes are arranged in the waste heat recovery barrel in an equidistant mode and penetrate through the heat exchange channel, and the upper end and the lower end of each heat exchange copper pipe are communicated with the upper end and the lower end of the interior of the waste heat recovery barrel respectively.

Furthermore, the heat exchange copper pipe is of a six-mango star-shaped structure.

Further, accept the groove and be located waste heat recovery barrel bottom, accept that the inslot portion is the range form and installs the rhombus post, the rhombus post slides and pegs graft in heat transfer copper pipe, and the rhombus post top is connected with scrapes the piece, scrapes a cross section and the same with heat transfer copper pipe shape, scrapes the piece and is located waste heat recovery barrel top, scrapes a sliding connection inside heat transfer copper pipe.

Further, joint holes have been seted up respectively at waste heat recovery bucket bottom both ends, and it has rotated respectively to accept groove top both ends and has had the knob, and the knob rotates to laminate in joint hole top side.

Further, the exhaust port has been seted up at waste heat recovery bucket top, and the exhaust port advances the tobacco pipe through the cross and is linked together with three purge tube, and the purge tube top is installed and is sprayed the pipe support, sprays the pipe support bottom and installs the shower nozzle.

Further, a flow guide ring groove is formed in the inner side of the bottom of the purifying pipe, a top baffle is arranged right above the top of the flow guide ring groove and located at the bottom of the spraying pipe frame, the inner diameter of the flow guide ring groove is smaller than the outer diameter of the top baffle, and the flow guide ring groove is communicated with the heat exchange copper pipe.

Further, the inside splash proof piece that installs of purifying tube, splash proof piece are inside honeycomb, and splash proof top is outer convex spherical surface structure, and splash proof top is concave spherical surface structure, and splash proof is located and sprays the pipe support bottom, and the top baffle is located splash proof bottom.

Compared with the prior art, the invention has the following beneficial effects:

1. the arrangement of the waste heat recovery barrel and the heat exchange copper pipe is beneficial to heating the heat conduction liquid circulating in the heat exchange channel through the heat exchange copper pipe when the heat conduction liquid enters the heat exchange channel through the liquid inlet, so that the heated heat conduction liquid flows into external waste heat power generation equipment through the liquid outlet, and the utilization effect of the waste heat in the flue gas is improved; and the cooperation heat transfer copper pipe adopts the setting of six awn star column structures, and the inside and outside both sides area of contact of increase heat transfer copper pipe promotes the inside waste heat of flue gas and to heat transfer copper pipe intensification efficiency, and then promotes heat transfer copper pipe and to the inside heat-conducting liquid heating efficiency of heat transfer passageway.

2. Accept groove, three-diamond post and scrape the setting of piece, be favorable to when heat transfer copper pipe inner wall adheres to there being thick flue gas impurity, will accept the groove and dismantle from waste heat recovery bucket bottom, accept the three-diamond post that the inslot portion is connected and drive and scrape the piece downstream, strike off heat transfer copper pipe inner wall flue gas impurity through scraping the piece, accept the groove and accept the collection to flue gas impurity, make heat transfer copper pipe inner wall keep clean state, guarantee heat transfer copper pipe heat-conduction effect.

3. The arrangement of the purification pipes and the spraying pipe frame is beneficial to enabling smoke in the waste heat recovery barrel to enter the three purification pipes through the four-way smoke inlet pipe respectively, the flow velocity of the smoke is reduced, the spray head at the bottom of the spraying pipe frame sprays water flow into the purification pipes, the smoke circulating in the purification pipes is purified through the water flow, harmful impurities carried in the smoke are dissolved in water, and the smoke purification effect is guaranteed; and the cooperation water conservancy diversion annular and the setting of top baffle, make the flue gas circulate to top baffle bottom through the middle part of water conservancy diversion annular, the flue gas is inside through top baffle circulation to the purifying tube, stops purifying produced sewage through top baffle, makes sewage drip to the water conservancy diversion annular in through top baffle edge, prevents that sewage from advancing the tobacco pipe through the cross and getting into in the waste heat recovery bucket, influence the inside waste heat recovery effect of waste heat recovery bucket.

4. The setting of splashproof piece is favorable to spraying when purifying when spraying pipe support bottom shower head to the flue gas, sprays produced sewage and flows down along the splashproof piece inner wall, and when sewage flowed to the splashproof piece bottom indent spherical structure, most sewage prevented that sewage from splashing inside the four-way inlet smoke pipe along splashproof piece bottom concave surface water conservancy diversion to the purge tube inner wall.

Drawings

FIG. 1 is a schematic axial side view of the present invention.

Fig. 2 is a schematic view of an installation structure of a heat exchange copper pipe inside the waste heat recovery barrel.

Fig. 3 is a schematic sectional view of the waste heat recovery tank of the present invention.

FIG. 4 is a schematic view of the structure of the heat exchange copper tube shaft side of the present invention.

FIG. 5 is a schematic view of the connection structure of the receiving groove, the triangular prism and the scraping block of the present invention.

Fig. 6 is a schematic view of the bottom shaft side structure of the scraping block of the invention.

FIG. 7 is a schematic view of the four-way smoke inlet pipe, the purification pipe and the four-way smoke exhaust pipe of the present invention.

Fig. 8 is a schematic sectional view of the inside of the purification pipe of the present invention.

Fig. 9 is a schematic view of the bottom shaft side structure of the splash guard of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. a waste heat recovery barrel; 101. a smoke inlet; 102. a smoke outlet; 103. a heat exchange channel; 104. a liquid inlet; 105. a liquid discharge port; 106. a clamping hole; 2. a heat exchange copper pipe; 3. a receiving groove; 301. a knob; 4. a three-diamond column; 5. scraping the block; 6. a four-way smoke inlet pipe; 7. a purge tube; 701. a flow guide ring groove; 702. a top baffle; 8. spraying a pipe frame; 801. a spray head; 9. a splash guard; 10. a long bolt; 11. a water inlet pipe; 12. a blow-off pipe; 13. a four-way smoke exhaust pipe.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 9:

the invention provides a waste heat utilization and flue gas purification system beneficial to carbon neutralization and electrolysis of flue gas, which comprises a waste heat recovery barrel 1, a receiving groove 3, a four-way smoke inlet pipe 6, a purification pipe 7 and a spray pipe frame 8;

the outer side of the waste heat recovery barrel 1 is provided with a smoke inlet 101, the heat exchange copper pipe 2 is vertically arranged inside the waste heat recovery barrel 1, the heat exchange copper pipe 2 is of a six-mango star-shaped structure, the contact area of the inner side and the outer side of the heat exchange copper pipe 2 is increased, the heating efficiency of waste heat inside smoke on the heat exchange copper pipe 2 is improved, and the heating efficiency of the heat exchange copper pipe 2 on heat conducting liquid inside the heat exchange channel 103 is further improved; the bearing groove 3 is communicated with the bottom of the waste heat recovery barrel 1, the bearing groove 3 is connected with the scraping block 5 through the three-diamond-shaped column 4, the clamping holes 106 are formed in two ends of the bottom of the waste heat recovery barrel 1 respectively, the knobs 301 are rotated at two ends of the top of the bearing groove 3 respectively, the knobs 301 are attached to the top sides of the clamping holes 106 in a rotating mode, when the bearing groove 3 is installed at the bottom of the waste heat recovery barrel 1, the knobs 301 are inserted into the clamping holes 106 and rotated, the knobs 301 are enabled to be attached to the top sides of the clamping holes 106 in a rotating mode, the bearing groove 3 is fixed through the knobs 301, and the sealing effect of the bearing groove 3 on the bottom of the waste heat recovery barrel 1 is guaranteed; the four-way smoke inlet pipe 6 is arranged at the top of the waste heat recovery barrel 1, and two ends of the four-way smoke inlet pipe 6 are respectively connected with two ends of a four-way smoke exhaust pipe 13 through long bolts 10; the upper end and the lower end of the purifying pipe 7 are respectively communicated with a four-way smoke inlet pipe 6 and a four-way smoke exhaust pipe 13, the outer side of the purifying pipe 7 is connected with a sewage discharge pipe 12, the inner side of the bottom of the purifying pipe 7 is provided with a flow guide ring groove 701, a top baffle 702 is arranged right above the top of the flow guide ring groove 701, the top baffle 702 is positioned at the bottom of the spray pipe frame 8, the inner diameter of the flow guide ring groove 701 is smaller than the outer diameter of the top baffle 702, the flow guide ring groove 701 is communicated with the heat exchange copper pipe 2, smoke is enabled to flow to the bottom of the top baffle 702 through the middle part of the flow guide ring groove 701, the smoke is enabled to flow to the inside of the purifying pipe 7 through the top baffle 702, the sewage generated by purification is blocked through the top baffle 702, the sewage is enabled to drip into the flow guide ring groove 701 through the edge of the top baffle 702, and is prevented from entering the waste heat recovery barrel 1 through the four-way smoke inlet pipe 6, and the waste heat recovery effect inside the waste heat recovery barrel 1 is influenced; the spray pipe frame 8 is communicated with the water inlet pipe 11, and the water inlet pipe 11 is positioned outside the purifying pipe 7.

The waste heat recovery device comprises a waste heat recovery barrel 1, a liquid inlet 104, a liquid outlet 105, a heat exchange copper pipe 2, a heat exchange copper pipe heat exchanger, a heat exchanger and a controller, wherein the waste heat recovery barrel 1 is internally provided with the heat exchange channel 103 which is bent up and down, the outer side of the waste heat recovery barrel 1 is respectively provided with the liquid inlet 104 and the liquid outlet 105, the upper end and the lower end of the heat exchange channel 103 are respectively communicated with the liquid inlet 104 and the liquid outlet 105, the heat exchanger 1 is internally provided with the heat exchange copper pipe 2 which is arranged at equal distance, the heat exchange copper pipe 2 penetrates through the heat exchange channel 103, and the upper end and the lower end of the heat exchange copper pipe 2 are respectively communicated with the upper end and the lower end of the heat exchanger 1;

adopt above-mentioned technical scheme, inside heat-conducting liquid got into heat transfer passageway 103 through inlet 104, the heat-conducting liquid that high temperature flue gas circulated heat transfer passageway 103 inside through heat transfer copper pipe 2 heats, makes in the heat-conducting liquid after the heating flowed into outside waste heat power generation equipment through leakage fluid dram 105, promotes the inside waste heat utilization effect of flue gas.

The waste heat recovery device comprises a waste heat recovery barrel 1, a receiving groove 3, triangular prism columns 4, a scraping block 5, a heat exchange copper pipe 2, a scraping block 5 and a waste heat recovery barrel, wherein the receiving groove 3 is positioned at the bottom of the waste heat recovery barrel 1, the triangular prism columns 4 are arranged inside the receiving groove 3, the triangular prism columns 4 are inserted into the heat exchange copper pipe 2 in a sliding mode, the top ends of the triangular prism columns 4 are connected with the scraping block 5, the cross sections of the scraping block 5 are the same as the shape of the heat exchange copper pipe 2, the scraping block 5 is positioned in the top of the waste heat recovery barrel 1, and the scraping block 5 is connected inside the heat exchange copper pipe 2 in a sliding mode;

adopt above-mentioned technical scheme, when 2 inner walls of heat transfer copper pipe are adhered to and have thick flue gas impurity, will accept groove 3 and dismantle from 1 bottom of waste heat recovery bucket, accept the three diamond post 4 that 3 inside connections in groove and drive and scrape piece 5 downstream, strike off heat transfer copper pipe 2 inner walls flue gas impurity through scraping piece 5, accept groove 3 and accept the collection to flue gas impurity, make 2 inner walls of heat transfer copper pipe keep clean state, guarantee heat transfer copper pipe 2 heat-conduction effects.

The top of the waste heat recovery barrel 1 is provided with a smoke outlet 102, the smoke outlet 102 is communicated with three purification pipes 7 through a four-way smoke inlet pipe 6, the top of each purification pipe 7 is provided with a spray pipe frame 8, and the bottom of each spray pipe frame 8 is provided with a spray head 801;

adopt above-mentioned technical scheme, in waste heat recovery bucket 1 inside flue gas enters smoke pipe 6 through the cross and gets into three purge tube 7 respectively, the flue gas velocity of flow slows down, sprays 8 bottom shower nozzles 801 of pipe support and sprays rivers to purge tube 7 in, purifies the flue gas of the inside circulation of purge tube 7 through rivers, makes the harmful impurity who carries in the flue gas dissolve in the aquatic, guarantee gas cleaning.

In another embodiment, the splash-proof piece 9 is arranged in the purification pipe 7, the splash-proof piece 9 is honeycomb-shaped, the top of the splash-proof piece 9 is of an outer convex spherical structure, the top of the splash-proof piece 9 is of an inner concave spherical structure, the splash-proof piece 9 is positioned at the bottom of the spray pipe frame 8, and the top baffle 702 is positioned at the bottom of the splash-proof piece 9;

adopt above-mentioned technical scheme, when 8 bottom shower nozzles 801 of spray pipe support spray the flue gas when purifying, spray produced sewage and flow downwards along 9 inner walls of splashproof piece, when sewage flows to 9 bottom indent spherical structures of splashproof piece, most sewage prevent that sewage from splashing to the inside of four-way inlet smoke pipe 6 along 9 bottom concave surface water conservancy diversion of splashproof piece to the inner wall of purge tube 7.

The specific use mode and function of the embodiment are as follows:

when the waste heat power generation device is used, high-temperature flue gas enters the waste heat recovery barrel 1 through the flue gas inlet 101, the high-temperature flue gas respectively flows into the heat exchange copper pipes 2, heat conducting liquid enters the heat exchange channel 103 through the liquid inlet 104, the high-temperature flue gas heats the heat conducting liquid flowing in the heat exchange channel 103 through the heat exchange copper pipes 2, and the heated heat conducting liquid flows into external waste heat power generation equipment through the liquid outlet 105, so that the utilization effect of waste heat in the flue gas is realized; next, the flue gas in the waste heat recovery barrel 1 enters three purifying pipes 7 through a four-way smoke inlet pipe 6 respectively, the flow rate of the flue gas is reduced, a spray head 801 at the bottom of a spray pipe frame 8 sprays water flow into the purifying pipes 7, the flue gas circulating in the purifying pipes 7 is purified through the water flow, harmful impurities carried in the flue gas are dissolved in the water, and the flue gas purifying effect is guaranteed; when the spray head 801 at the bottom of the spray pipe frame 8 sprays and purifies the flue gas, sewage generated by spraying flows downwards along the inner wall of the splash-proof piece 9, and when the sewage flows to the concave spherical structure at the bottom of the splash-proof piece 9, most of the sewage is guided to the inner wall of the purification pipe 7 along the concave surface at the bottom of the splash-proof piece 9; the top baffle 702 is used for blocking the sewage generated by purification, so that the sewage is dripped into the flow guide ring groove 701 through the edge of the top baffle 702 and is finally discharged through the sewage discharge pipe 12, and the sewage is prevented from entering the waste heat recovery barrel 1 through the four-way smoke inlet pipe 6 to influence the waste heat recovery effect in the waste heat recovery barrel 1; when thicker flue gas impurities are attached to the inner wall of the heat exchange copper pipe 2, the receiving groove 3 is detached from the bottom of the waste heat recovery barrel 1, the triangular prism 4 connected inside the receiving groove 3 drives the scraping block 5 to move downwards, the flue gas impurities on the inner wall of the heat exchange copper pipe 2 are scraped through the scraping block 5, and the receiving groove 3 receives and collects the flue gas impurities, so that the inner wall of the heat exchange copper pipe 2 is kept in a clean state, and the heat conduction effect of the heat exchange copper pipe 2 is guaranteed; when accepting groove 3 and installing in waste heat recovery bucket 1 bottom, knob 301 is pegged graft in joint hole 106 to rotary knob 301 makes knob 301 rotate and laminates in joint hole 106 top side, fixes accepting groove 3 through knob 301, and the guarantee is accepted groove 3 and is sealed the effect in waste heat recovery bucket 1 bottom.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.