CN213395389U

CN213395389U - Novel flue gas cooling device of condensing boiler

Info

Publication number: CN213395389U
Application number: CN202022113568.8U
Authority: CN
Inventors: 黄建涛; 陈静; 陈雨
Original assignee: Shandong Yutao Thermal Energy Technology Co ltd
Current assignee: Shandong Yutao Thermal Energy Technology Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-06-08
Anticipated expiration: 2030-09-24

Abstract

The utility model provides a novel flue gas cooling device of a condensing boiler, which comprises a cooling box, a partition plate, a flue gas inlet pipe, a flue gas outlet pipe, a cold water pipe, a heat conducting fin, a water injection box, a water outlet box, a first water discharging pipe, a cold water box, a second water discharging pipe, a detachable filter box structure and a spray conveying box structure, wherein the partition plate is respectively welded at the upper part and the lower part on the right side of the inner wall of the cooling box and the middle part on the left side of the inner wall; the smoke inlet pipe is welded on the right side of the upper end of the cooling box; the smoke outlet pipe is welded at the lower part of the right end of the cooling box; the cold water pipe is welded in the cooling tank and the partition plate respectively, and the outer wall of the cold water pipe is welded with the heat conducting fins. The utility model has the advantages that: through the setting of dismantled and assembled rose box structure, and then be convenient for pour into the work of flue gas into or exhaust flue gas into, and be convenient for filter the flue gas.

Description

Novel flue gas cooling device of condensing boiler

Technical Field

The utility model belongs to the technical field of the cooling of condensation boiler flue gas, especially, relate to a novel cooling of condensation boiler flue gas device.

Background

The boiler is an energy conversion device, the fuel is burnt through the burner, the high-temperature flue gas after burning enters the flue gas cooling chamber through the combustion chamber to be cooled and converts chemical energy and the like in the fuel into heat energy, the heat energy released by the fuel is absorbed by cooling water, the output of the boiler is represented as steam or high-temperature water with certain heat energy, meanwhile, the high-temperature flue gas generated after burning the fuel is discharged from a smoke outlet pipeline after being fully cooled, the condensing boiler can absorb sensible heat in the high-temperature flue gas after burning the fuel and can also absorb latent heat of vaporization released by condensing the water vapor in the high-temperature flue gas, the heat efficiency of the condensing boiler is high, a cooling device can be used for cooling when the flue gas of the existing condensing boiler is cooled, and therefore the boiler can work better.

However, the existing cooling device for the flue gas of the condensing boiler has the problems that the filtering function and the single cooling mode are inconvenient to carry out and the cooling effect is poor.

Therefore, it is necessary to invent a new cooling device for flue gas of condensing boiler.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a novel condensation boiler flue gas cooling device to solve current condensation boiler flue gas cooling device and be not convenient for carry out filterable function and the single and relatively poor problem of cooling effect of cooling method. A novel flue gas cooling device of a condensing boiler comprises a cooling box, a partition plate, a flue gas inlet pipe, a flue gas outlet pipe, a cold water pipe, a heat conducting strip, a water injection box, a water outlet box, a first water discharge pipe, a cold water box, a second water discharge pipe, a detachable filter box structure and a sprayable conveying box structure, wherein the partition plate is respectively welded on the upper part and the lower part of the right side of the inner wall of the cooling box and the middle part of the left side of the inner wall; the smoke inlet pipe is welded on the right side of the upper end of the cooling box; the smoke outlet pipe is welded at the lower part of the right end of the cooling box; the cold water pipe is respectively welded inside the cooling tank and the partition plate, and the outer wall of the cold water pipe is welded with the heat conducting fins; the water injection box is welded in the middle of the upper end of the cooling box; the water outlet box is welded in the middle of the lower end of the cooling box; the first drainage pipe is welded on the right side of the lower end in the cooling box; the cold water box is welded at the upper part of the right side of the inner wall of the cooling box and is arranged above the partition plate; the second drain pipe is welded above the right side in the cooling box; the detachable filter box structure is arranged on the smoke inlet pipe; the spraying conveying box structure is arranged on the smoke outlet pipe; the detachable filter box structure comprises a working box, a first communicating pipe, a second communicating pipe, a high-temperature filter element, a filter screen, a detachable cover and a rotating rod, wherein the first communicating pipe is welded at the upper part of the right end of the working box; the second communicating pipe is welded at the lower end of the working box; one end of the high-temperature filter element is connected with the dismounting cover through a bolt, and the other end of the high-temperature filter element is sleeved at the upper end of the second communicating pipe; the filter screen is embedded on the outer wall of the high-temperature filter element; the periphery of the outer wall of the dismounting cover is welded with a rotating rod.

Preferably, the spraying conveying box structure comprises a cold water tank, a first connecting pipe, a water storage tank, a water pump, a water injection pipe, a spraying head and a collecting and discharging separation frame structure, wherein the first connecting pipe is welded at the left end of the cold water tank, and the left end of the first connecting pipe is connected with a smoke outlet pipe flange; the water storage tank is welded in the middle of the upper end of the cold water tank; the water pump bolt is arranged in the middle of the lower part of the front end of the water storage tank; one end of the water injection pipe is connected with the water pump through threads, and the other end of the water injection pipe is inserted into the middle part above the inside of the cold water tank; the sprinkler head is in threaded connection with the lower side of the interior of the water injection pipe; the collecting and discharging separation frame structure is arranged in the cold water tank.

Preferably, the collecting and discharging separation frame structure comprises a fixed plate, a first collecting plate, a second collecting plate, a first protective plate, a second protective plate, a desiccant dehumidification filter element, a second connecting pipe, a drain pipe and a drain valve, wherein the fixed plate is welded in the middle of the lower side in the cold water tank; the first collecting plate is welded at the left end of the fixed plate; the second gathering plate is welded at the right end of the fixed plate; the first protection plate is respectively installed on the left side of the upper end of the first gathering plate and the left side of the inner wall of the cold water tank through bolts; the second protective plate is respectively installed on the right side of the upper end of the second aggregation plate and the right side of the inner wall of the cold water tank through bolts; one end of the desiccant dehumidification filter element is connected with the middle part of the right end of the second protection plate, and the other end of the desiccant dehumidification filter element is connected with the second connecting pipe through a bolt; the second connecting pipe is welded in the middle of the right side in the cold water tank; the blow-off pipe is welded at the middle part of the cold water tank and the fixed plate respectively, and the lower end of the blow-off pipe is connected with a blow-off valve in a threaded manner.

Preferably, the inside of the working box is respectively provided with a high-temperature filter element and a filter screen, so that the smoke can be conveniently filtered by the high-temperature filter element and the filter screen.

Preferably, the detachable cover is T-shaped, the detachable cover is in threaded connection with the upper portion of the inner portion of the working box, and a plurality of rotating rods are arranged on the outer wall of the detachable cover.

Preferably, the lower end of the high-temperature filter element is communicated with a second communicating pipe, the high-temperature filter element corresponds to the first communicating pipe, and the second communicating pipe at the lower end of the working box is connected with the smoke inlet pipe through a flange.

Preferably, the upper surfaces of the first collecting plate and the second collecting plate are respectively arranged in an inclined shape, and a fixing plate is arranged between the first collecting plate and the second collecting plate.

Preferably, the periphery of the inside of the first protection plate is provided with through holes. The periphery of the outer side of the inside of the first protection plate is provided with through holes, and the desiccant dehumidification filter element in the middle of the right side of the second protection plate is connected with the second connecting pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, the work box in the part be provided with high temperature filter core and filter screen respectively, be convenient for make the flue gas filter through high temperature filter core and filter screen, then pass the second communicating pipe and enter into the cooler bin in, and then increased the functionality.

2. The utility model discloses in, dismouting lid set up to the T type, dismouting lid threaded connection in the top of work box inside, the dismouting dwang of covering on the outer wall be provided with a plurality ofly, be convenient for drive the dismouting lid through the dwang and rotate to carry out the dismouting and use.

3. The utility model discloses in, high temperature filter core lower extreme and second communicating pipe intercommunication, high temperature filter core correspond with first communicating pipe, second communicating pipe and the entering tobacco pipe flange joint of work box lower extreme, and then be convenient for pour into the work of flue gas or exhaust flue gas into, and be convenient for filter the flue gas.

4. The utility model discloses in, the top of cold water storage cistern inner wall be provided with the sprinkler head, the sprinkler head be provided with a plurality ofly, be convenient for more even water spray to cool down the flue gas through the cold water storage cistern, and increased the effect of cooling.

5. The utility model discloses in, the water injection pipe set up to the L type, the water injection pipe pass through water pump and storage water tank connection, this water pump of drive can make the water in the storage water tank carry the water injection intraductal use that uses.

6. The utility model discloses in, the first connecting pipe and the play tobacco pipe flange joint of cold water storage cistern left end, be convenient for interconnect uses thereupon.

7. The utility model discloses in, first aggregation board and second aggregation board upper surface set up to the slope form respectively, first aggregation board and second aggregation board between be provided with the fixed plate, be convenient for gather spun sewage to discharge through blow off pipe and blowoff valve.

8. The utility model discloses in, first protection shield inside be provided with the through-hole all around. The inside outside of first protection shield all around be provided with the through-hole, the desiccant dehumidification filter core and the second connecting pipe of second protection shield right side middle part be connected, during the use, can make the flue gas pass the below that first protection shield reachs the sprinkler head and cool off, later pass the outside that the second protection shield reachs desiccant dehumidification filter core, pass desiccant dehumidification filter core at last and filter and follow the discharge of second connecting pipe.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the detachable filter box structure of the present invention.

Fig. 3 is a schematic structural view of the structure of the spraying conveying box of the present invention.

Fig. 4 is a schematic structural view of the collecting and discharging partition frame structure of the present invention.

In the figure:

1. a cooling tank; 2. a partition plate; 3. a smoke inlet pipe; 4. discharging the smoke tube; 5. a cold water pipe; 6. a heat conductive sheet; 7. a water injection box; 8. a water outlet box; 9. a first drain pipe; 10. a cold water box; 11. a second drain pipe; 12. a detachable filter box structure; 121. a work box; 122. a first communication pipe; 123. a second communicating pipe; 124. a high temperature filter element; 125. a filter screen; 126. disassembling and assembling the cover; 127. rotating the rod; 13. a sprayable conveying box structure; 131. a cold water tank; 132. a first connecting pipe; 133. a water storage tank; 134. a water pump; 135. a water injection pipe; 136. a sprinkler head; 137. a collecting and discharging partition frame structure; 1371. a fixing plate; 1372. a first collector plate; 1373. a second aggregation plate; 1374. a first protective plate; 1375. a second protective plate; 1376. a desiccant dehumidification filter element; 1377. a second connecting pipe; 1378. a blow-off pipe; 1379. a blowoff valve.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

example (b):

as shown in fig. 1 and fig. 2, a novel flue gas cooling device for a condensing boiler comprises a cooling box 1, a partition plate 2, a flue gas inlet pipe 3, a flue gas outlet pipe 4, a cold water pipe 5, a heat conducting fin 6, a water injection box 7, a water outlet box 8, a first water discharge pipe 9, a cold water box 10, a second water discharge pipe 11, a detachable filter box structure 12 and a spraying conveying box structure 13, wherein the partition plate 2 is respectively welded at the upper part and the lower part of the right side of the inner wall of the cooling box 1 and the middle part of the left side of the inner wall; the smoke inlet pipe 3 is welded on the right side of the upper end of the cooling box 1; the smoke outlet pipe 4 is welded at the lower part of the right end of the cooling box 1; the cold water pipe 5 is respectively welded inside the cooling tank 1 and the partition plate 2, and the outer wall of the cold water pipe 5 is welded with the heat conducting fins 6; the water injection box 7 is welded in the middle of the upper end of the cooling box 1; the water outlet box 8 is welded in the middle of the lower end of the cooling box 1; the first drainage pipe 9 is welded at the right side of the lower end in the cooling box 1; the cold water box 10 is welded at the upper part of the right side of the inner wall of the cooling box 1 and is arranged above the partition plate 2; the second water discharge pipe 11 is welded above the right side in the cooling box 1; the detachable filter box structure 12 is arranged on the smoke inlet pipe 3; the sprayable conveying box structure 13 is arranged on the smoke outlet pipe 4; the detachable filter box structure 12 comprises a work box 121, a first communicating pipe 122, a second communicating pipe 123, a high-temperature filter element 124, a filter screen 125, a detachable cover 126 and a rotating rod 127, wherein the first communicating pipe 122 is welded at the upper part of the right end of the work box 121; the second communicating pipe 123 is welded at the lower end of the working tank 121; one end of the high-temperature filter element 124 is connected with the dismounting cover 126 by a bolt, and the other end is sleeved at the upper end of the second communicating pipe 123; the filter screen 125 is embedded on the outer wall of the high-temperature filter core 124; the rotating rod 127 is welded around the outer wall of the detachable cover 126.

As shown in fig. 3, in the above embodiment, specifically, the sprayable delivery tank structure 13 includes a cold water tank 131, a first connection pipe 132, a water storage tank 133, a water pump 134, a water injection pipe 135, a sprinkler 136 and a collecting and discharging separation frame structure 137, the first connection pipe 132 is welded at the left end of the cold water tank 131, and the left end of the first connection pipe 132 is connected with the flange of the smoke outlet pipe 4; the water storage tank 133 is welded in the middle of the upper end of the cold water tank 131; the water pump 134 is mounted in the middle of the lower part of the front end of the water storage tank 133 through bolts; one end of the water injection pipe 135 is connected with the water pump 134 by screw thread, and the other end is inserted into the middle part above the inside of the cold water tank 131; the sprinkler head 136 is screw-coupled to the inner lower side of the water injection pipe 135; the collecting and discharging partition structure 137 is installed inside the cold water tank 131.

As shown in fig. 4, in the above embodiment, in particular, the collecting and draining partition frame structure 137 includes a fixing plate 1371, a first collecting plate 1372, a second collecting plate 1373, a first protecting plate 1374, a second protecting plate 1375, a desiccant dehumidifying cartridge 1376, a second connecting pipe 1377, a drain pipe 1378 and a drain valve 1379, the fixing plate 1371 is welded at a middle portion of the inner lower side of the cold water tank 131; the first collecting plate 1372 is welded at the left end of the fixing plate 1371; the second collecting plate 1373 is welded at the right end of the fixing plate 1371; the first protecting plate 1374 is respectively installed at the left side of the upper end of the first collecting plate 1372 and the left side of the inner wall of the cold water tank 131 by bolts; the second protection plate 1375 is respectively installed at the right side of the upper end of the second collection plate 1373 and the right side of the inner wall of the cold water tank 131 by bolts; one end of the desiccant dehumidification filter element 1376 is connected with the middle part of the right end of the second protection plate 1375, and the other end of the desiccant dehumidification filter element 1376 is connected with the second connection pipe 1377 through bolts; the second connecting pipe 1377 is welded at the middle part of the right side inside the cold water tank 131; blow off pipe 1378 weld respectively in the inside middle part of cold water tank 131 and fixed plate 1371, and blow off pipe 1378 lower extreme threaded connection has blowoff valve 1379.

In the above embodiment, specifically, the inside of the working box 121 is respectively provided with the high temperature filter element 124 and the filter screen 125, so that the flue gas can be conveniently filtered by the high temperature filter element 124 and the filter screen 125, and then enters the cooling box 1 through the second communicating pipe 123, thereby increasing the functionality.

In the above embodiment, specifically, the detachable cover 126 is provided with a T-shaped structure, the detachable cover 126 is screwed into the upper portion of the inside of the work box 121, and the plurality of rotating rods 127 are provided on the outer wall of the detachable cover 126, so that the detachable cover 126 is driven to rotate by the rotating rods 127, and thereby the detachable cover is detached and used.

In the above embodiment, specifically, the lower end of the high-temperature filter element 124 is communicated with the second communicating pipe 123, the high-temperature filter element 124 corresponds to the first communicating pipe 122, and the second communicating pipe 123 at the lower end of the working box 121 is flange-connected to the smoke inlet pipe 3, so as to facilitate the work of injecting or discharging smoke, and facilitate the filtering of smoke.

In the above embodiment, specifically, the plurality of spray heads 136 are arranged above the inner wall of the cold water tank 131, so that more uniform water spraying is facilitated, the flue gas passing through the cold water tank 131 is cooled, and the cooling effect is increased.

In the above embodiment, the water filling pipe 135 is specifically provided in an L shape, the water filling pipe 135 is connected to the water storage tank 133 by the water pump 134, and the water in the water storage tank 133 can be transported into the water filling pipe 135 for use by driving the water pump 134.

In the above embodiment, specifically, the first connection pipe 132 at the left end of the cold water tank 131 is flange-connected to the smoke outlet pipe 4, so as to be connected to each other and used therewith.

In the above embodiment, specifically, the upper surfaces of the first collecting plate 1372 and the second collecting plate 1373 are respectively set to be inclined, and a fixing plate 1371 is disposed between the first collecting plate 1372 and the second collecting plate 1373, so as to collect the sprayed sewage, and discharge the sewage through the sewage discharge pipe 1378 and the sewage discharge valve 1379.

In the above embodiment, specifically, through holes are formed around the inside of the first protection plate 1374. The periphery of the inner outer side of the first protection plate 1374 is provided with through holes, the desiccant dehumidification filter 1376 at the middle part of the right side of the second protection plate 1375 is connected with the second connecting pipe 1377, so that smoke can pass through the first protection plate 1374 to reach the lower part of the sprinkler head 136 for cooling during use, then pass through the second protection plate 1375 to reach the outer side of the desiccant dehumidification filter 1376, finally pass through the desiccant dehumidification filter 1376 for filtering and be discharged from the second connecting pipe 1377.

In the above embodiment, specifically, the water pump 134 is a model YYP370 model 370 water pump.

Principle of operation

The utility model discloses a theory of operation: when the device is used, cold water is injected into the cold water pipe 5 through the water injection box 7, meanwhile, smoke is injected into the working tank 121 through the first communicating pipe 122, then the smoke is filtered by the high-temperature filter element 124 and the filter screen 125 and then passes through the second communicating pipe 123 to reach the inside of the cooling tank 1, when the water enters into the cold water pipe 5, the smoke can perform heat exchange and cooling work after entering into the cooling tank 1, after the work is completed, the water is discharged through the water outlet box 8, the smoke enters into the cold water tank 131 through the smoke outlet pipe 4 and the first communicating pipe 132 and then passes through the first protection plate 1374 to reach the lower part of the sprinkler head 136, when the smoke enters, the water pump 134 is driven to enable the water in the water storage tank 133 to enter into the water injection pipe 135 and to be sprayed into the cold water tank 131 through the sprinkler head 136, so as to filter the smoke, after secondary cooling is completed, the smoke passes through the second protection plate 1375 to reach the outer side of the, and finally filtered through the desiccant dehumidification cartridge 1376 and discharged from the second connection pipe 1377, thus completing the work.

Utilize technical scheme, or technical personnel in the field are in the utility model discloses under technical scheme's the inspiration, design similar technical scheme, and reach above-mentioned technological effect, all fall into the utility model discloses a protection scope.

Claims

1. The novel flue gas cooling device for the condensing boiler is characterized by comprising a cooling box (1), a partition plate (2), a smoke inlet pipe (3), a smoke outlet pipe (4), a cold water pipe (5), heat conducting fins (6), a water injection box (7), a water outlet box (8), a first water discharge pipe (9), a cold water box (10), a second water discharge pipe (11), a detachable filter box structure (12) and a spraying conveying box structure (13), wherein the partition plate (2) is welded to the upper part and the lower part of the right side of the inner wall of the cooling box (1) and the middle part of the left side of the inner wall respectively; the smoke inlet pipe (3) is welded on the right side of the upper end of the cooling box (1); the smoke outlet pipe (4) is welded at the lower part of the right end of the cooling box (1); the cold water pipe (5) is respectively welded inside the cooling tank (1) and the partition plate (2), and meanwhile, the outer wall of the cold water pipe (5) is welded with a heat-conducting fin (6); the water injection box (7) is welded in the middle of the upper end of the cooling box (1); the water outlet box (8) is welded in the middle of the lower end of the cooling box (1); the first drainage pipe (9) is welded on the right side of the lower end in the cooling box (1); the cold water box (10) is welded at the upper part of the right side of the inner wall of the cooling box (1) and is arranged above the partition plate (2); the second drain pipe (11) is welded above the right side in the cooling box (1); the detachable filter box structure (12) is arranged on the smoke inlet pipe (3); the sprayable conveying box structure (13) is arranged on the smoke outlet pipe (4); the detachable filter box structure (12) comprises a working box (121), a first communicating pipe (122), a second communicating pipe (123), a high-temperature filter element (124), a filter screen (125), a detachable cover (126) and a rotating rod (127), wherein the first communicating pipe (122) is welded at the upper part of the right end of the working box (121); the second communicating pipe (123) is welded at the lower end of the working box (121); one end of the high-temperature filter element (124) is connected with the dismounting cover (126) through a bolt, and the other end of the high-temperature filter element is sleeved at the upper end of the second communicating pipe (123); the filter screen (125) is embedded on the outer wall of the high-temperature filter core (124); and rotating rods (127) are welded around the outer wall of the dismounting cover (126).

2. A novel flue gas cooling device of a condensing boiler as claimed in claim 1, wherein said spraying delivery box structure (13) comprises a cold water tank (131), a first connecting pipe (132), a water storage tank (133), a water pump (134), a water injection pipe (135), a sprinkler head (136) and a collecting and discharging partition frame structure (137), the first connecting pipe (132) is welded at the left end of the cold water tank (131), and the left end of the first connecting pipe (132) is connected with the flange of the flue gas outlet pipe (4); the water storage tank (133) is welded in the middle of the upper end of the cold water tank (131); the water pump (134) is arranged in the middle of the lower part of the front end of the water storage tank (133) through bolts; one end of the water injection pipe (135) is in threaded connection with the water pump (134), and the other end of the water injection pipe is inserted into the middle part above the inside of the cold water tank (131); the sprinkler head (136) is connected with the lower side of the inner part of the water injection pipe (135) in a threaded way; the collecting and discharging separation frame structure (137) is arranged in the cold water tank (131).

3. A new condensing boiler flue gas cooling device as claimed in claim 2, characterized in that said collecting and discharging partition frame structure (137) comprises a fixing plate (1371), a first collecting plate (1372), a second collecting plate (1373), a first protecting plate (1374), a second protecting plate (1375), a desiccant dehumidifying filter element (1376), a second connecting pipe (1377), a blow-off pipe (1378) and a blow-off valve (1379), said fixing plate (1371) is welded at the middle portion of the lower side inside the cold water tank (131); the first collecting plate (1372) is welded at the left end of the fixing plate (1371); the second collecting plate (1373) is welded at the right end of the fixing plate (1371); the first protection plates (1374) are respectively installed on the left side of the upper end of the first gathering plate (1372) and the left side of the inner wall of the cold water tank (131) through bolts; the second protection plate (1375) is respectively installed on the right side of the upper end of the second aggregation plate (1373) and the right side of the inner wall of the cold water tank (131) through bolts; one end of the drying agent dehumidification filter element (1376) is connected with the middle part of the right end of the second protection plate (1375), and the other end of the drying agent dehumidification filter element is connected with a second connecting pipe (1377) through bolts; the second connecting pipe (1377) is welded at the middle part of the right side in the cold water tank (131); blow off pipe (1378) weld respectively in cold water tank (131) and fixed plate (1371) inside middle part, and blow off pipe (1378) lower extreme threaded connection has blowoff valve (1379).

4. A new type flue gas cooling device for condensing boiler as claimed in claim 1, characterized in that said working box (121) is provided with a high temperature filter core (124) and a filter screen (125) inside, respectively, for facilitating the flue gas to be filtered through the high temperature filter core (124) and the filter screen (125).

5. A novel flue gas cooling device for a condensing boiler as claimed in claim 1, characterized in that said detachable cover (126) is provided with a T-shape, said detachable cover (126) is screwed on the upper part of the inside of the working box (121), and a plurality of rotating rods (127) are provided on the outer wall of said detachable cover (126).

6. A novel flue gas cooling device for a condensing boiler as claimed in claim 1, wherein the lower end of said high temperature filter element (124) is connected to the second connection pipe (123), said high temperature filter element (124) is corresponding to the first connection pipe (122), and the second connection pipe (123) at the lower end of said operating box (121) is flange-connected to the flue gas inlet pipe (3).

7. A new condensing boiler flue gas cooling device as claimed in claim 2, characterized in that a plurality of spray heads (136) are arranged above the inner wall of said cold water tank (131).

8. A new type of flue gas cooling device of condensing boiler as claimed in claim 2, characterized in that said water injection pipe (135) is arranged in L-shape, said water injection pipe (135) is connected with the water storage tank (133) by means of water pump (134).

9. A new type of flue gas cooling arrangement in a condensing boiler according to claim 3, characterized in that the upper surfaces of said first (1372) and second (1373) collector plates are arranged as inclined, respectively, and a fixing plate (1371) is arranged between said first (1372) and second (1373) collector plates.

10. A new type of flue gas cooling device for condensing boilers, as claimed in claim 3, characterized in that the inside of the first protecting plate (1374) is provided with through holes all around; the inside outside of first protection shield (1374) be provided with the through-hole all around, second protection shield (1375) right side middle part desiccant dehumidification filter core (1376) be connected with second connecting pipe (1377).