CN212746923U

CN212746923U - Indirect heating water receiving boiler

Info

Publication number: CN212746923U
Application number: CN202021523886.5U
Authority: CN
Inventors: 包乐霖; 申秀峰; 许春立; 李靖; 袁晓涛
Original assignee: Beijing Olympia Boiler Co Ltd
Current assignee: Beijing Olympia Boiler Co Ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-03-19
Anticipated expiration: 2030-07-28

Abstract

The application discloses indirect heating water receiving boiler, it includes the shell, the shell inner chamber has set firmly the stove courage, stove courage one end stretches out the shell inner chamber, the one end that the stove courage stretches out the shell inner chamber has set firmly the combustor, the one end that the stove courage is located the shell inner chamber has set firmly the chamber of backflowing, set firmly the circulating pipe rather than the inner chamber intercommunication on the chamber of backflowing, set firmly preceding smoke chamber rather than the inner chamber intercommunication on the circulating pipe, preceding smoke chamber sets up in the shell inner chamber, the intercommunication has the condenser of dismantling the connection in the shell outside on the preceding smoke chamber, set firmly the smoke return joint on the condenser, the detachable smoke return pipe that is connected with on the smoke return joint, the smoke return pipe communicates with combustor inlet end; the shell is provided with a heat exchanger, the heat exchange end of the heat exchanger is positioned in the inner cavity of the shell, and the connecting end of the heat exchanger is provided with a water inlet joint and a water outlet joint. This application has the effect that reduces boiler nitrogen content.

Description

Indirect heating water receiving boiler

Technical Field

The application relates to the technical field of atmospheric pressure boilers, in particular to an indirect heating water receiving boiler.

Background

The main working principle of the boiler is that heat energy released after fuel combustion or waste heat in industrial production is transferred to water in a container, so that the water reaches the required temperature or steam with a certain pressure. The boiler is operated at the same time in the two parts of boiler and boiler, after water enters the boiler, the boiler heating surface transfers the absorbed heat to water in the steam-water system, so that the water is heated into hot water with certain temperature and pressure or generated steam, and the hot water or the generated steam is led out for application. In the combustion equipment part, fuel is combusted to continuously release heat, high-temperature flue gas generated by combustion transfers the heat to a boiler heating surface through heat propagation, the temperature of the high-temperature flue gas is gradually reduced, and the high-temperature flue gas is finally discharged from a chimney.

The utility model discloses a chinese utility model patent that grant bulletin number is CN204648658U discloses an energy-concerving and environment-protective type vacuum boiler, including combustor, base, smoke box, boiler body, heat exchanger, energy-saving appliance and circulating water pump, boiler body sets up on the base, combustor and this body coupling of boiler, and the smoke box setting is between combustor and boiler body, and the energy-saving appliance setting is in boiler body top, and the heat exchanger sets up the upper portion at this internal boiler, and the energy-saving appliance is connected with the smoke box, and circulating water pump passes through the pipeline and is connected with heat exchanger and energy-saving appliance respectively, and parallel connection between heat exchanger and the energy-saving appliance.

The above prior art solutions have the following drawbacks: in order to achieve the aim of sustainable development, the content of waste gas generated by boiler combustion is reduced, the concentration of nitrogen oxides in the discharged waste gas is reduced, the effect of reducing air pollution is achieved, the emission of the nitrogen oxides of the boiler is reduced under the condition of meeting the use requirement of the boiler, and the development of low nitrogen is promoted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an indirect heating water receiving boiler, it has the effect that reduces boiler nitrogen content.

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

an indirect heating water receiving boiler comprises an outer shell, wherein a furnace pipe is fixedly arranged in an inner cavity of the outer shell, one end of the furnace pipe extends out of the inner cavity of the outer shell, a burner is fixedly arranged at one end of the furnace pipe extending out of the inner cavity of the outer shell, a combustion chamber is fixedly arranged at one end of the furnace pipe located in the inner cavity of the outer shell, a circulating pipe communicated with the inner cavity of the combustion chamber is fixedly arranged on the combustion chamber, a front smoke chamber communicated with the inner cavity of the circulating pipe is fixedly arranged on the circulating pipe, the front smoke chamber is arranged in the inner cavity of the outer shell, a condenser detachably connected to the outer side of the outer shell is communicated with the front smoke chamber, a smoke return joint is fixedly arranged on the condenser, a smoke return pipe is detachably connected to the smoke; the shell is provided with a heat exchanger, the heat exchange end of the heat exchanger is positioned in the inner cavity of the shell, and the connecting end of the heat exchanger is provided with a water inlet joint and a water outlet joint.

By adopting the technical scheme, the mixed gas of fuel and air sprayed by the burner is combusted in the furnace pipe, high-temperature fuel gas enters the circulating pipe through the back combustion chamber, the circulating pipe and the furnace pipe heat water in the inner cavity of the shell, waste gas in the circulating pipe enters the front smoke chamber, smoke in the front smoke chamber enters the condenser, the condenser further absorbs heat in the waste gas, the temperature of the waste gas discharged from the condenser is reduced, clean water enters the heat exchanger from the water inlet joint, then absorbs heat in the waste gas flowing through the heat exchanger, and finally the clean water is discharged from the water outlet joint; and part of the waste gas entering the condenser enters the combustor through the smoke returning pipe and then enters the furnace pipe through the combustor to be combusted again, so that the content of oxynitride in the fuel gas is reduced.

The application is further configured to: a lifting lug is fixedly arranged on the condenser;

a lower flange joint is fixedly arranged on the front smoke chamber, an upper flange joint is fixedly arranged on the condenser, the condenser and the front smoke chamber are connected through the flange joints, a supporting plate is fixedly arranged on the shell, a connecting plate is fixedly arranged on the condenser, and the connecting plate is detachably connected with the supporting plate;

the condenser is fixedly provided with a condensation water inlet pipe and a condensation water drain pipe, and the condensation water drain pipe is detachably connected with a water replenishing joint which is fixed on the shell and communicated with the inner cavity of the shell.

By adopting the technical scheme, the condenser is lifted by using the lifting lug and then placed on the shell, the upper flange joint is aligned with the lower flange joint, then the connecting plate is aligned with the supporting plate, the upper flange joint is connected with the lower flange joint by using the bolt and nut assembly, the connecting plate is connected with the supporting plate, and then the condensation drain pipe is connected with the water replenishing joint; the condenser and the shell are respectively transported, so that the transportation of the boiler is convenient, and then the installation is carried out on site.

The application is further configured to: the back-burning chamber comprises two semicircular rings with opposite openings, the axes of the semicircular rings are parallel to the shell, the two ends of each semicircular ring are respectively and fixedly provided with a back-burning plate, the end surfaces of the two semicircular rings and the back-burning plates, which are back to the furnace, are fixedly provided with a bottom plate, the end surfaces of the two semicircular rings and the back-burning plates, which face the furnace, are fixedly provided with a top plate, and the furnace and the circulating pipe penetrate through the top plate to be communicated with the back-burning chamber;

a plurality of reinforcing plates are fixedly arranged on the two back-burning plates, and the reinforcing plates are rectangular plates with the length arranged along the axis direction of the furnace pipe;

the bottom plate is fixedly provided with a plurality of reinforcing rods arranged at intervals, and the reinforcing rods are fixedly connected with the shell.

Through adopting above-mentioned technical scheme, the effective cross-sectional area of the structure ability make full use of shell of flashback chamber helps reducing the volume of shell, and reinforcing plate and stiffener can improve the structural strength of flashback chamber simultaneously, improve its stability.

The application is further configured to: the furnace is a pipe body with the axis coaxial with one half of the circular ring, the furnace is connected to one end of the top plate, and the circulating pipe is connected to the other end of the top plate.

By adopting the technical scheme, the high-temperature flue gas in the furnace pipe enters the circulating pipe at the other end of the flashback chamber after entering one end of the flashback chamber.

The application is further configured to: the heat exchanger is provided with two above the inner cavity of the shell at intervals, and two supporting rods fixed in the shell are pressed against and pressed on the lower side of the heat exchange end of the heat exchanger.

Through adopting above-mentioned technical scheme, the bracing piece can support the heat exchanger, reduces the effort that the heat exchanger applyed the rear end plate, improves the stability that heat exchanger and rear end plate are connected, can improve the structural strength of shell simultaneously.

The application is further configured to: two adjusting seats used for being connected with the supporting rod are fixedly arranged on the shell, adjusting grooves are formed in the upper surface of each adjusting seat, adjusting blocks which are inserted into the adjusting grooves and slide in the adjusting grooves along the vertical direction are fixed at the two ends of the supporting rod respectively, and one end of each adjusting seat is in threaded connection with an adjusting screw rod, wherein one end of each adjusting screw rod extends out of the corresponding adjusting groove.

Through adopting above-mentioned technical scheme, rotate adjusting screw and can drive the regulating block and remove along vertical direction to drive the adjustment of bracing piece position, be convenient for realize the bracing piece installation back with the heat transfer of heat exchanger side stable contact.

The application is further configured to: the supporting rod is provided with a yielding ring groove, the supporting rod is sleeved with a sliding ring, and the thickness of the sliding ring is smaller than the depth of the yielding ring groove.

By adopting the technical scheme, after the heat exchange end of the heat exchanger is placed on the sliding ring, acting force along the axis direction of the shell is applied to the heat exchanger, and the heat exchanger drives the sliding ring to slide on the surface of the supporting rod, so that the abrasion caused by the sliding of the side surface of the supporting rod when the heat exchanger is installed is reduced;

after the sliding ring moves to the abdicating ring groove, the sliding ring is sleeved in the abdicating ring groove, and at the moment, the outer side surface of the sliding ring is separated from the heat exchange end of the heat exchanger, so that the normal support of the heat exchanger by the support rod is ensured.

The application is further configured to: the shell comprises an outer tube, a front end plate and a rear end plate are fixedly arranged at two ends of the outer tube respectively, an end cover with an opening back to the rear end plate is fixedly arranged on the front end plate, and a cylindrical shell formed by the end cover and the front end plate is a front smoke chamber;

a walking channel is fixedly arranged above the side face of the outer tube, inclined support rods positioned below the walking channel are fixedly arranged on the outer tube, the inclined support rods are fixed on the inner sides of two ends of the outer tube, and the inclined support rods are respectively fixed on the rear end plate and the end cover.

Through adopting above-mentioned technical scheme, the diagonal brace can be used for supporting the outer tube, improves the structural strength of outer tube to improve the overall structure intensity of shell, guarantee walking channel's normal use.

In summary, the present application includes at least one of the following benefits:

1. the mixed gas of fuel and air sprayed by the burner is combusted in the furnace pipe, high-temperature fuel gas enters the circulating pipe through the flashback chamber, the circulating pipe and the furnace pipe heat water in the inner cavity of the shell, waste gas in the circulating pipe enters the front smoke chamber, smoke in the front smoke chamber enters the condenser, the condenser further absorbs heat in the waste gas and reduces the temperature of the waste gas discharged from the condenser, and clear water enters the heat exchanger from the water inlet joint, then absorbs heat in the waste gas flowing through the heat exchanger, and finally is discharged from the water outlet joint; part of the waste gas entering the condenser enters the combustor through the smoke returning pipe and then enters the furnace liner through the combustor to be combusted again, so that the content of oxynitride in the fuel gas is reduced;

2. the structure of the recombustion chamber can fully utilize the effective cross-sectional area of the shell, which is beneficial to reducing the volume of the shell, and meanwhile, the reinforcing plate and the reinforcing rod can improve the structural strength of the recombustion chamber and improve the stability of the recombustion chamber;

3. after the heat exchange end of the heat exchanger is placed on the sliding ring, acting force along the axis direction of the shell is applied to the heat exchanger, and the heat exchanger drives the sliding ring to slide on the surface of the supporting rod, so that abrasion caused by sliding of the side face of the supporting rod during installation of the heat exchanger is reduced.

Drawings

FIG. 1 is a schematic overall structure diagram of the first embodiment;

FIG. 2 is a schematic diagram illustrating the structure of the inner cavity of the housing according to the first embodiment;

FIG. 3 is a schematic sectional view showing the structure of the circulation tube and the furnace in the first embodiment;

FIG. 4 is a schematic cross-sectional view of an adjusting seat according to a second embodiment;

fig. 5 is a schematic cross-sectional view illustrating the support rod according to the second embodiment.

In the figure, 1, a housing; 11. a support plate; 12. a water replenishing joint; 13. an outer tube; 14. a front end plate; 15. a rear end plate; 16. a walking channel; 17. a diagonal brace; 18. an atmospheric joint; 2. a furnace pipe; 3. a flashback chamber; 31. a semicircular ring; 32. a flashback panel; 33. a base plate; 34. a top plate; 35. a reinforcing plate; 36. a reinforcing bar; 4. a front smoke chamber; 41. a lower flange joint; 42. an end cap; 5. a circulation pipe; 6. a condenser; 61. a smoke return joint; 62. lifting lugs; 63. an upper flange joint; 64. a connecting plate; 65. a condensation water inlet pipe; 66. a condensation drain pipe; 7. a heat exchanger; 71. a support bar; 711. an adjusting block; 712. a abdicating ring groove; 72. an adjusting seat; 721. an adjustment groove; 73. adjusting the screw rod; 74. a slip ring.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

Example one

Referring to fig. 1 and 2, for the present application, an indirect heating water receiving boiler is disclosed, which comprises a housing 1, the housing 1 comprises an outer tube 13, the outer tube 13 is a circular tube with an outer side provided with a heat insulation material, a support frame placed on the ground is arranged below the outer tube 13,

a front end plate 14 and a rear end plate 15 are respectively welded and fixed at two ends of the outer tube 13, and the front end plate 14 and the rear end plate 15 are circular plates coaxial with the appearance.

Referring to fig. 2, an end cap 42 with an opening facing away from the rear end plate 15 is fixedly disposed on the front end plate 14, the end cap 42 is a cylindrical cover, an outer side surface of the end cap 42 contacts with an inner side surface of the outer tube 13, and a cylindrical shell formed by the end cap 42 and the front end plate 14 is the front smoke chamber 4.

Referring to fig. 2 and 3, a furnace pipe 2 penetrating through the front smoke chamber 4 and extending into the inner cavity of the housing 1 is arranged on the front end plate 14 in a penetrating manner, the furnace pipe 2 is a pipe body with the axis parallel to the axis of the outer pipe 13, a flange connector is arranged at one end of the furnace pipe 2, which is positioned outside the housing 1, one end of the furnace pipe 2 extending out of the inner cavity of the housing 1 is detachably connected with a burner through the flange connector, and the burner is a low-nitrogen burner.

The one end that stove courage 2 is located the 1 inner chamber of shell has set firmly back combustion chamber 3, back combustion chamber 3 is the long circle casing, back combustion chamber 3 includes two semicircle rings 31 that the opening is relative, semicircle ring 31's axis all is on a parallel with shell 1, wherein semicircle ring 31's axis and stove courage 2 axis coincidence and semicircle ring 31's external diameter are the same with stove courage 2's the biggest external diameter, semicircle ring 31's upper and lower both ends have set firmly a back combustion plate 32 respectively, two semicircle rings 31 and two back combustion plate 32 set firmly a bottom plate 33 to the terminal surface of stove courage 2 dorsad, two semicircle rings 31 and two back combustion plate 32 have set firmly a roof 34 towards the terminal surface of stove courage 2, stove courage 2 passes roof 34 and communicates with back combustion chamber 3.

Two reinforcing plates 35 have been set firmly respectively on the surface that two back fire board 32 carried on the back mutually, and reinforcing plate 35 sets up along back fire board 32 length direction interval, and reinforcing plate 35 is the rectangular board that length set up along 2 axis directions of stove courage. A plurality of reinforcing rods 36 with one ends welded with the bottom plate 33 penetrate through the bottom plate 33, and one ends of the reinforcing rods 36 positioned outside the combustion chamber 3 are fixedly connected with the rear end plate 15.

One end of the top plate 34 is connected with the furnace pipe 2, the other end of the top plate 34 is connected with a plurality of circulating pipes 5 communicated with the inner cavity of the back combustion chamber 3, the circulating pipes 5 are arranged on the top plate 34 at intervals, the axial lines of the circulating pipes 5 are parallel to the axial line of the outer pipe 13, and one end of the circulating pipe 5 far away from the top plate 34 penetrates through the end cover 42 and is welded with the end cover 42, so that the communication between the inner cavity of the circulating pipe 5 and the inner cavity of the.

Referring to fig. 2, a lower flange joint 41 with one end extending out of the inner cavity of the outer tube 13 is fixedly arranged on the front smoke chamber 4, a condenser 6 is detachably connected to the lower flange joint 41, an upper flange joint 63 is fixedly arranged on the condenser 6, the condenser 6 is connected with the front smoke chamber 4 through the flange joints, and the detachable connection between the lower flange joint 41 and the upper flange joint 63 is realized by using a bolt and nut assembly.

Referring to fig. 2 and 3, a support plate 11 is fixedly arranged on the shell 1, the support plate 11 is a T-shaped plate and comprises an arc plate welded with the shell 1 and a vertical plate welded with the arc plate, a connecting plate 64 is fixedly arranged on the condenser 6, the connecting plate 64 is an L-shaped plate, and the connecting plate 64 is detachably connected with the support plate 11 through a bolt-nut assembly.

The condenser 6 is fixedly provided with a condensation water inlet pipe 65 and a condensation water outlet pipe 66, clear water enters the condenser 6 from the condensation water inlet pipe 65 and flows out from the condensation water outlet pipe 66 through the heating of the condenser 6, and the condensation water outlet pipe 66 is detachably connected with a water replenishing joint 12 (see fig. 1) which is fixed on the shell 1 and is communicated with the inner cavity of the shell 1 through a bolt.

The condenser 6 is provided with a flange interface used for being communicated with a smoke exhaust pipe at the end far away from the end connected with the lower flange joint 41, and a lifting lug 62 used for lifting the condenser 6 is fixedly arranged on the condenser 6.

The end of the condenser 6 provided with the upper flange joint 63 is fixedly provided with a smoke return joint 61, the smoke return joint 61 is detachably connected with a smoke return pipe, the smoke return pipe is not shown in the drawing, and the smoke return pipe is communicated with the air inlet end of the burner.

Referring to fig. 2 and 3, the heat exchanger 7 is arranged on the housing 1, two connecting holes are formed in the rear end plate 15 at intervals, the number of the heat exchangers 7 is two, the heat exchange end of the heat exchanger 7 penetrates through the connecting holes and then extends into the inner cavity of the housing 1, and the connecting end of the heat exchanger 7 is provided with a water inlet joint and a water outlet joint.

Two support rods 71 with two ends respectively welded on the rear end plate 15 and the end cover 42 are pressed against and pressed below any heat exchanger 7.

Referring to fig. 2 and 3, a walking channel 16 is fixedly arranged above the side surface of the outer tube 13, inclined support rods 17 positioned below the walking channel 16 are fixedly arranged on the outer tube 13, the inclined support rods 17 are fixed on the inner sides of two ends of the outer tube 13, three inclined support rods 17 are respectively arranged at two ends of the outer tube 13, and the inclined support rods 17 are respectively fixed on the rear end plate 15 and the end cover 42.

Referring to fig. 1, an air connector 18 is fixed above the housing 1.

The implementation principle of the above embodiment is as follows:

the mixed gas of fuel and air sprayed by a burner is combusted in a furnace pipe 2, high-temperature fuel gas enters a circulating pipe 5 through a combustion chamber 3, the circulating pipe 5 and the furnace pipe 2 heat water in the inner cavity of a shell 1, waste gas in the circulating pipe 5 enters a front smoke chamber 4, smoke in the front smoke chamber 4 enters a condenser 6, the condenser 6 further absorbs heat in the waste gas and reduces the temperature of the waste gas discharged from the condenser 6, and clean water enters a heat exchanger 7 from a water inlet joint, then absorbs heat in the waste gas flowing through the heat exchanger 7 and is discharged from a water outlet joint; and part of the waste gas entering the condenser 6 enters the combustor through the smoke return pipe and then enters the furnace pipe 2 through the combustor to be combusted again, so that the content of oxynitride in the gas is reduced.

Example two

Referring to fig. 4, the indirect heating water boiler is different from embodiment 1 in that two adjusting seats 72 for connecting with a supporting rod 71 are fixedly arranged on a casing 1, four groups of adjusting seats 72 are provided, and each group of adjusting seats 72 includes two adjusting seats 72 respectively welded on the opposite surfaces of a rear end plate 15 and an end cover 42.

The upper surface of the adjusting seat 72 is provided with an adjusting groove 721, the adjusting groove 721 is a cylindrical groove, the lower surface of the adjusting seat 72 is in threaded connection with an adjusting screw 73, one end of the adjusting screw 73 extends out of the adjusting groove 721, and one end of the adjusting screw 73 extending out of the adjusting groove 721 is abutted with a circular plate, one side of which is in contact with the side of the adjusting groove 721.

An adjusting block 711 which is inserted into the adjusting groove 721 and slides in the adjusting groove 721 along the vertical direction is fixed at each end of the supporting rod 71, the adjusting block 711 is a cylindrical block with one end welded to the side surface of the supporting rod 71, and the end of the cylindrical block extending into the adjusting groove 721 contacts with the end surface of the circular plate in the adjusting groove 721.

The implementation principle of the above embodiment is as follows:

the adjusting screw 73 is rotated to drive the adjusting block 711 to move in the vertical direction, so that the position of the supporting rod 71 is adjusted, and the supporting rod 71 is conveniently and stably contacted with the side surface of the heat exchange end of the heat exchanger 7 after being installed.

EXAMPLE III

Referring to fig. 5, an indirect heating water receiving boiler is different from embodiment 1 in that a yielding ring groove 712 is formed in a support rod 71, the yielding ring groove 712 is disposed at one end of the support rod 71 close to an end cover 42, the yielding ring groove 712 is an annular groove, the support rod 71 is sleeved with a sliding ring 74 sliding along an axial direction of the support rod, the thickness of the sliding ring 74 is half of the depth of the yielding ring groove 712, and a coating layer for increasing a surface friction coefficient of the sliding ring 74 is disposed on an outer side surface of the sliding ring 74.

The implementation principle of the above embodiment is as follows:

after the heat exchange end of the heat exchanger 7 is placed on the sliding ring 74, acting force along the axial direction of the shell 1 is applied to the heat exchanger 7, and the heat exchanger 7 drives the sliding ring 74 to slide on the surface of the supporting rod 71, so that abrasion caused by sliding on the side surface of the supporting rod 71 when the heat exchanger 7 is installed is reduced;

when the sliding ring 74 moves to the receding ring groove 712, the sliding ring 74 is sleeved in the receding ring groove 712, and the outer side surface of the sliding ring 74 is separated from the heat exchange end of the heat exchanger 7.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The utility model provides an indirect heating water receiving boiler, includes shell (1), shell (1) inner chamber has set firmly stove courage (2), shell (1) inner chamber is stretched out to stove courage (2) one end, the one end that shell (1) inner chamber was stretched out in stove courage (2) has set firmly the combustor, the one end that stove courage (2) are located shell (1) inner chamber has set firmly flashback chamber (3), set firmly circulating pipe (5) rather than the inner chamber intercommunication on flashback chamber (3), set firmly preceding smoke chamber (4) rather than the inner chamber intercommunication on circulating pipe (5), preceding smoke chamber (4) set up in shell (1) inner chamber, its characterized in that: the front smoke chamber (4) is communicated with a condenser (6) detachably connected to the outer side of the shell (1), a smoke return connector (61) is fixedly arranged on the condenser (6), a smoke return pipe is detachably connected to the smoke return connector (61), and the smoke return pipe is communicated with the air inlet end of the combustor;

the heat exchanger (7) is arranged on the shell (1), the heat exchange end of the heat exchanger (7) is located in the inner cavity of the shell (1), and the connecting end of the heat exchanger (7) is provided with a water inlet joint and a water outlet joint.

2. An indirect-heating water-receiving boiler as claimed in claim 1, wherein: a lifting lug (62) is fixedly arranged on the condenser (6);

a lower flange joint (41) is fixedly arranged on the front smoke chamber (4), an upper flange joint (63) is fixedly arranged on the condenser (6), the condenser (6) is connected with the front smoke chamber (4) through the flange joint, a supporting plate (11) is fixedly arranged on the shell (1), a connecting plate (64) is fixedly arranged on the condenser (6), and the connecting plate (64) is detachably connected with the supporting plate (11);

the condenser is characterized in that a condensation water inlet pipe (65) and a condensation water drain pipe (66) are fixedly arranged on the condenser (6), and the condensation water drain pipe (66) is detachably connected with a water supplementing joint (12) which is fixed on the shell (1) and is communicated with an inner cavity of the shell.

3. An indirect-heating water-receiving boiler as claimed in claim 1, wherein: the recombustion chamber (3) comprises two semicircular rings (31) with opposite openings, the axis of each semicircular ring (31) is parallel to the shell (1), the two ends of each semicircular ring (31) are respectively and fixedly provided with a recombustion plate (32), the end surfaces, back to the furnace pipe (2), of the two semicircular rings (31) and the recombustion plates (32) are fixedly provided with a bottom plate (33), the end surfaces, facing the furnace pipe (2), of the two semicircular rings (31) and the recombustion plates (32) are fixedly provided with a top plate (34), and the furnace pipe (2) and the circulating pipe (5) penetrate through the top plate (34) to be communicated with the recombustion chamber (3);

a plurality of reinforcing plates (35) are fixedly arranged on the two back-burning plates (32), and the reinforcing plates (35) are rectangular plates with the length arranged along the axial direction of the furnace pipe (2);

the bottom plate (33) is fixedly provided with a plurality of reinforcing rods (36) which are arranged at intervals, and the reinforcing rods (36) are fixedly connected with the shell (1).

4. An indirect-heating water-receiving boiler as claimed in claim 3, wherein: the furnace pipe (2) is a pipe body with the axis coaxial with one semicircular ring (31), the furnace pipe (2) is connected to one end of the top plate (34), and the circulating pipe (5) is connected to the other end of the top plate (34).

5. An indirect-heating water-receiving boiler as claimed in claim 1, wherein: the heat exchanger (7) is provided with two above the inner cavity of the shell (1) at intervals, and two supporting rods (71) fixed in the shell (1) are pressed against and pressed on the lower part of the heat exchange end of the heat exchanger (7).

6. An indirect-heating water-receiving boiler as claimed in claim 5, wherein: the utility model discloses a support bar, including shell (1), be used for the bracing piece (71) to be connected, the shell sets firmly two regulation seats (72) that are used for being connected with bracing piece (71), it is provided with adjusting groove (721) to adjust seat (72) upper surface, the both ends of bracing piece (71) are fixed with one respectively and insert adjusting groove (721) and follow gliding adjusting block (711) of vertical direction in adjusting groove (721), adjusting seat (72) lower surface threaded connection has one end to stretch out adjusting screw (73) in adjusting groove (721).

7. An indirect-heating water-receiving boiler as claimed in claim 5, wherein: offer one on bracing piece (71) and let a spacing annular (712), the cover is equipped with a slip ring (74) on bracing piece (71), the thickness of slip ring (74) is less than the degree of depth of letting spacing annular (712).

8. An indirect-heating water-receiving boiler as claimed in claim 1, wherein: the shell (1) comprises an outer tube (13), a front end plate (14) and a rear end plate (15) are fixedly arranged at two ends of the outer tube (13) respectively, an end cover (42) with an opening back to the rear end plate (15) is fixedly arranged on the front end plate (14), and a cylindrical shell formed by the end cover (42) and the front end plate (14) is a front smoke chamber (4);

a walking channel (16) is fixedly arranged above the side face of the outer tube (13), inclined support rods (17) located below the walking channel (16) are fixedly arranged on the outer tube (13), the inclined support rods (17) are fixed to the inner sides of the two ends of the outer tube (13), and the inclined support rods (17) are respectively fixed to the rear end plate (15) and the end cover (42).