CN210107348U - Circulating condensing boiler - Google Patents

Abstract

The utility model discloses a circulating condensing boiler, which comprises a boiler shell, wherein the upper end of the boiler shell is provided with a lower collecting box, the lower end of the boiler shell is provided with an upper collecting box, the upper collecting box is provided with a burner, a combustion pipe is fixedly arranged at one end of the burner facing the lower collecting box, and a disc is fixedly arranged on the inner wall of one end of the lower collecting box, which is back to the boiler shell; the lower collecting box is fixedly provided with a heat exchange tube communicated with the lower collecting box and the upper collecting box, the heat exchange tube comprises an outer tube and an inner tube, the two ends of the outer tube are respectively communicated with the inner cavities of the lower collecting box and the upper collecting box, the inner tube is positioned on the inner side of the outer tube, and the inner tube is connected with a water inlet device; an annular partition plate is fixedly arranged at one end, close to the boiler shell, of the inner cavity of the upper header, the partition plate is positioned between the ring where the outer pipe is located and the ring where the inner pipe is located, an upper partition ring is fixedly arranged at one end, opposite to the boiler shell, of the partition plate, a steam-water separation device is fixedly arranged on the upper partition ring, and the steam-water separation device is arranged above the inner cavity of the upper header; the upper header is fixedly provided with a steam joint. The utility model discloses the effect that the boiler can produce steam fast has.

Description

Circulating condensing boiler

Technical Field

The utility model belongs to the technical field of the boiler technique and specifically relates to a circulation condensation boiler is related to.

Background

At present, gas-fired boilers are mainly divided into a vertical type and a horizontal type: although the horizontal gas-fired boiler can realize the condensation and recovery of the flue gas, the horizontal gas-fired boiler has the following disadvantages: the occupied area is large, and the site adaptability is poor; the water volume is big, and body heat dissipation loss is big, and the actual operating efficiency who causes is low, and steam production speed is slow, and the start loss is big, and it needs heating power deoxidization to intake, and exhaust gas temperature is higher or need independent water circulating system, and the corruption of condenser is serious, can't guarantee life, and the automatic control level ratio is laggard behind, and present vertical gas boiler has following shortcoming and not enough: the exhaust gas temperature is high, and the thermal efficiency is low.

The Chinese patent with the granted publication number of CN105571132B discloses a vertical natural circulation condensing boiler, which comprises a boiler body, wherein the boiler body comprises a hearth and a flue gas cavity positioned at the radial outer side of the hearth, a flue gas outlet is formed in the outer circumferential wall of the flue gas cavity, a flue gas inlet is reserved in the inner circumferential wall of the flue gas cavity, the deflection angle between the flue gas outlet and the flue gas inlet is larger than 90 degrees, and an upper annular header and a lower annular header are respectively arranged at the upper end and the lower end of the flue gas cavity; between ring type collection box and the lower ring type collection box, through concentrating riser bundle and concentrating the downcomer bundle intercommunication, concentrate the downcomer bundle and include the concentrated downcomer that the round arranged along the gas chamber circumference, concentrate riser bundle and include two rings at concentrated downcomer bundle radial inboard, along the concentrated tedge of the coaxial arrangement of circumference of gas chamber, the outer lane of concentrating the riser bundle all leaves just to the exhanst gas outlet with concentrating the downcomer bundle, the flue gas discharge clearance of vertical setting, the inner circle of concentrating the riser bundle is equipped with just to the flue gas entry, the flue gas entering clearance of vertical setting.

The above prior art solutions have the following drawbacks: the conventional boiler has a long time for generating steam, and although the time for generating steam in the boiler can be shortened by reducing circulating water in the boiler, the safety of the boiler during operation is reduced after the circulating water is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circulation condensation boiler, it has the effect of shortening the boiler and generating steam time under the higher condition of assurance work security.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a circulating condensation boiler comprises a boiler shell arranged in the vertical direction, wherein a lower collecting box of a hollow circular ring structure is arranged at the upper end of the boiler shell, an upper collecting box of a hollow circular ring structure is arranged at the lower end of the boiler shell, a burner is arranged on the upper collecting box, a combustion pipe positioned in the boiler shell is fixedly arranged at one end, facing the lower collecting box, of the burner, and a disc is fixedly arranged on the inner wall of one end, facing away from the boiler shell, of the lower collecting box;

the heat exchange tube is fixedly arranged on the lower collecting box and is communicated with the lower collecting box and the upper collecting box, the heat exchange tube comprises an outer tube and an inner tube, the two ends of the outer tube are respectively communicated with the inner cavities of the lower collecting box and the upper collecting box, the inner tube is positioned on the inner side of the outer tube, and the inner tube is connected with a water inlet device;

the water inlet device comprises a water inlet connector penetrating into the upper header, a fixedly arranged one-way valve is communicated with the water inlet connector, a water inlet pipe is communicated with the one-way valve, and a water inlet hole is formed in the side surface of the water inlet pipe;

the outer pipe comprises a plurality of sewer pipes, two ends of each sewer pipe are respectively communicated with the inner cavities of the upper header and the lower header, the sewer pipes are uniformly distributed along the circumferential direction of the lower header at intervals, an outer plate is welded between every two adjacent sewer pipes, and one side of the outer pipe, which is back to the smoke exhaust joint, is provided with an outer opening for allowing smoke to pass through;

the inner pipe comprises a plurality of upper water pipes communicated with the inner cavities of the lower header and the upper header, the upper water pipes are uniformly distributed along the circumferential direction of the lower header at intervals, an inner plate is welded between every two adjacent upper water pipes, and one side of the inner pipe, facing the smoke exhaust joint, is provided with an inner opening for allowing smoke to pass through;

an annular partition plate is fixedly arranged at one end, close to the boiler shell, of the inner cavity of the upper header, the partition plate is located between a circular ring where the outer pipe is located and a circular ring where the inner pipe is located, an upper partition ring is fixedly arranged at one end, opposite to the boiler shell, of the partition plate, a steam-water separation device is fixedly arranged on the upper partition ring, a water chamber is arranged on the surface, facing the boiler shell, of the steam-water separation device, a steam chamber is arranged on the surface, opposite to the boiler shell, of the steam-water separation device, and a steam-water separation device is arranged above the inner cavity;

and a steam joint communicated with the inner cavity of the upper header is fixedly arranged on the surface of the upper header, which is back to the boiler shell.

By adopting the technical scheme, the boiler can quickly produce steam, the gas production time is short, and the preheating cost is low; the boiler uses a membrane type water-cooled wall structure for heat transfer, and the heat transfer efficiency is high; the boiler has compact structure and small floor area; the upper header and the lower header of the boiler are large, the water holding amount is large, and the safety of the boiler is higher during operation; the boiler adopts upper water supply to realize the natural circulation of boiler water, and the water circulation is stable and the water level fluctuation is small; the steam-water separation device can improve the dryness of steam and output gas with higher dryness outwards.

The utility model discloses further set up to: the water inlet pipe is an annular pipe.

Through adopting above-mentioned technical scheme, the inlet tube can make the temperature difference that gets into the outer tube less to even the adding water in the header that makes.

The utility model discloses further set up to: and a drainage joint communicated with the inner cavity of the boiler shell is fixed on the side surface of the boiler shell.

Through adopting above-mentioned technical scheme, the impurity in the drainage joint ability discharge boiler casing.

The utility model discloses further set up to: and heat insulation materials covering the lower header towards the surface of the boiler shell are laid in the lower header.

Through adopting above-mentioned technical scheme, thermal-insulated material ability improves the life of collection box down to the radial protection of collection box down.

The utility model discloses further set up to: the upper header is internally provided with a sewage draining device positioned outside the steam-water isolating device, the sewage draining device comprises a sewage draining ring pipe fixed in the upper header, the sewage draining ring pipe is positioned at the bottom of the upper header with liquid water, a sewage draining water inlet hole is formed in the side surface of the sewage draining ring pipe, a sewage draining connecting pipe communicated with the inner cavity of the sewage draining ring pipe is fixedly arranged on the sewage draining ring pipe, and one end of the sewage draining connecting pipe, far away from the sewage draining ring pipe, extends out of the upper header.

Through adopting above-mentioned technical scheme, water in the boiler, although impurity content is less, still has partial aluminium magnesium ion, and aluminium magnesium ion most lies in the upper portion of the liquefied water that the header exists, and the blowdown ring canal can contain the higher water discharge of aluminium magnesium ion content with the part in the boiler, improves the life of boiler.

The utility model discloses further set up to: and a safety valve joint communicated with the inner cavity of the upper header is fixedly arranged on the surface of the upper header, which is back to the boiler shell.

Through adopting above-mentioned technical scheme, when the pressure in last header was too big, the relief valve opened, and the setting that the relief valve connects can improve the security that the boiler used.

The utility model discloses further set up to: two smoke baffles located at the two sides of the smoke exhaust joint along the circumferential direction of the boiler shell are fixedly arranged on the outer pipe.

By adopting the technical scheme, the smoke baffle plate can limit the airflow flowing between the outer side of the outer pipe and the boiler shell, the airflow discharged from the smoke exhaust joint directly by the airflow between the outer side of the outer pipe and the boiler shell is reduced, and the heat exchange efficiency of the airflow is improved.

The utility model discloses further set up to: the water supply pipe sleeve is provided with a protective sleeve, and the protective sleeve is positioned at the inner opening and along two water supply pipes in the circumferential direction of the inner pipe.

Through adopting above-mentioned technical scheme, the air current temperature of interior opening part is great, and two water-supply pipes of opening part are protected to the protective sheath.

To sum up, the beneficial effects of the utility model are that:

1. the boiler can quickly produce steam, the gas production time is short, and the preheating cost is low; the boiler uses a membrane type water-cooled wall structure for heat transfer, and the heat transfer efficiency is high; the boiler has compact structure and small floor area; the upper header and the lower header of the boiler are large, the water holding amount is large, and the safety of the boiler is higher during operation; the boiler adopts upper water supply to realize the natural circulation of boiler water, and the water circulation is stable and the water level fluctuation is small; the steam-water separation device can improve the dryness of steam and output gas with higher dryness outwards.

Drawings

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

FIG. 2 is a schematic sectional view of the embodiment;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 2;

fig. 5 is a schematic view of the internal structure of the condensing apparatus.

In the figure, 1, a boiler shell; 11. a smoke evacuation connector; 12. a burner; 121. a combustion tube; 13. a water discharge joint; 14. a gas pipeline; 15. releasing the pressure connector; 16. a steam joint; 17. a safety valve joint; 18. repairing the joint; 19. a sewage draining device; 191. a sewage draining ring pipe; 1911. a sewage draining water inlet hole; 192. a sewage discharge connecting pipe; 193. a blowdown joint; 2. a lower header; 21. a lower pull rod; 22. a supporting seat; 23. a disc; 3. a heat exchange pipe; 31. a water inlet device; 311. a water inlet joint; 312. a one-way valve; 313. a water inlet pipe; 314. a connecting rod; 32. an outer tube; 321. a sewer pipe; 322. an outer plate; 323. an outer opening; 33. an inner tube; 331. a water feeding pipe; 332. an inner plate; 333. an inner opening; 34. a smoke baffle; 35. a protective sleeve; 4. an upper header; 41. an upper pull rod; 42. a steam-water separation device; 43. a vapor-water isolation device; 44. a partition panel; 45. a connecting ring; 46. an external ring; 47. an upper spacer ring; 5. a condensing unit; 51. a condenser tank; 52. an air inlet joint; 53. a partition plate; 531. a lower plate; 532. an upper plate; 54. a main pipe; 55. a heat exchange pipe; 56. a water inlet pipe; 561. a one-way valve; 57. a water outlet pipe; 58. a discharge pipe; 59. a treatment tank; 61. a lower joint; 62. and (4) an upper connector.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example one

Referring to fig. 1 and 2, for the utility model discloses a circulating condensing boiler, including boiler casing 1, boiler casing 1 is circular cast's shell structure, and boiler casing 1's inner chamber diameter is 1230 millimeters, and boiler casing 1's wall thickness is 4 millimeters, and boiler casing 1's axis sets up along vertical direction, and boiler casing 1 side is worn to be equipped with and is welded in boiler casing 1 and connects 11 with discharging fume of 1 inner chamber intercommunication of boiler casing, and the joint 11 of discharging fume is located the part that boiler casing 1 is close to the upper end.

Referring to fig. 2, a lower collection box 2 is arranged at one end of the boiler shell 1 facing the ground, the lower collection box 2 is a circular ring with a hollow inner cavity, a disc 23 positioned on the inner wall of the lower collection box 2 is fixedly arranged at one end of the lower collection box 2, which is back to the boiler shell 1, an upper collection box 4 is arranged at one end of the boiler shell 1, which is back to the lower collection box 2, and the lower collection box 2 is a circular ring with a hollow inner cavity.

Referring to fig. 2, lower header 2 is ring type header, is confined cavity in the middle of lower header 2, and the welding has supporting seat 22 on the terminal surface of lower header 2 back to boiler shell 1, and supporting seat 22 has four along 2 circumference equipartitions of lower header.

Referring to fig. 2 and 3, a heat exchange pipe 553 is fixedly disposed on the lower header 2 and communicated with the lower header 2, and the heat exchange pipe 553 includes an outer pipe 32 and an inner pipe 33 which are penetratingly disposed on an end surface of the lower header 2 facing the boiler case 1 and welded to the lower header 2. The outer tube 32 is ring-shaped, and an outer opening 323 for allowing smoke to pass through is formed on a side of the outer tube 32 facing away from the smoke evacuation joint 11. The inner pipe 33 is located inside the outer pipe 32, the inner pipe 33 is ring-shaped, and an inner opening 333 for receiving smoke is provided on the side of the inner pipe 33 facing the smoke evacuation joint 11. The flue gas after combustion inside the inner tube 33 enters between the inner tube 33 and the outer tube 32 through the inner opening 333, the flue gas between the inner tube 33 and the outer tube 32 enters between the outer tube 32 and the boiler shell 1 through the outer opening 323, and the flue gas between the outer tube 32 and the boiler shell 1 enters the smoke exhaust joint 11.

Referring to fig. 2 and 3, the outer pipe 32 is located in a circular annular cavity enclosed by the boiler shell 1, the outer pipe 32 includes a plurality of downcomers 321 whose two ends are respectively communicated with the inner cavities of the upper header 4 and the lower header 2, the downcomers 321 are heat pipes whose central diameter is 60 mm and wall thickness is 3.5 mm, the downcomers 321 are uniformly distributed along the circumferential direction of the lower header 2 at intervals, the axis of each downcomer 321 is located on the side surface of a cylinder with the diameter of 1130 mm, an outer plate 322 is welded between two adjacent downcomers 321, the outer plate 322 is located between the side surfaces of the two downcomers 321, two ends of the outer plate 322 along the length direction of the downcomer 321 are respectively welded on two opposite end surfaces of the lower header 2 and the upper header 4, and the outer plate 322 is a long-. The outer side of the outer pipe 32 is welded with a smoke baffle 34 welded on the outer plate 322, and the smoke baffle 34 is provided with two sides respectively located on the smoke exhaust joint 11 along the circumferential direction of the boiler shell 1.

Referring to fig. 2 and 3, the inner tube 33 includes a plurality of upper water tubes 331 located in a circular cavity surrounded by the outer tube 32, the upper water tubes 331 are heat pipes having a central diameter of 60 mm and a wall thickness of 3.5 mm, the upper water tubes 331 are welded to the lower header 2 and the upper header 4 and are communicated with inner cavities of the lower header 2 and the upper header 4, the upper water tubes 331 are uniformly distributed along the circumferential direction of the lower header 2, the axis of the lower water pipe 321 is located on a side surface of a cylinder having a diameter of 950 mm, an inner plate 332 is welded between two adjacent upper water tubes 331, the inner plate 332 is located between two upper water tubes 331, two ends of the inner plate 332 along the length direction of the upper water tubes 331 are respectively welded to two opposite end surfaces of the lower header 2 and the upper header 4, and the inner plate 332 is a long-strip-shaped plate having a thickness. Two water feeding pipes 331 positioned at the inner opening 333 along the circumferential direction of the inner pipe 33 are externally sleeved with protective sleeves 35, and the protective sleeves 35 are made of high-temperature-resistant nickel-based alloy pipes.

Referring to fig. 2, a plurality of lower pull rods 21 are arranged on the lower header 2 in a penetrating manner, the axes of the lower pull rods 21 are arranged along the vertical direction, the lower pull rods 21 are uniformly distributed along the circumferential direction of the lower header 2, and the outer diameter of the ring where the lower pull rods 21 are located is smaller than the inner diameter of the ring where the upper water pipe 331 is located.

Referring to fig. 2, the upper header 4 is provided with a plurality of upper pull rods 41 arranged along the vertical direction, the upper pull rods 41 are uniformly distributed along the circumference of the lower header 2, and the outer diameter of the ring where the upper pull rods 41 are located is equal to the outer diameter of the ring where the lower pull rods 21 are located.

Referring to fig. 2, a lower joint 61 communicated with an inner cavity of the lower header 2 is fixed on one side of the lower header 2, an upper joint 62 communicated with an inner cavity of the upper header 4 is fixed on one side of the upper header 4, and a water level gauge is communicated between the upper joint 62 and the lower joint 61, so that the water level in the upper header 4 is monitored.

Referring to fig. 2, an inspection joint 18 communicated with the inner cavity of the upper header 4 is fixedly arranged at one side of the upper header 4.

Referring to fig. 2, a safety valve joint 17 communicated with the inner cavity of the upper header 4 is fixedly arranged on the surface of the upper header 4 opposite to the boiler shell 1, a safety valve is connected to the safety valve joint 17, and when the pressure in the upper header 4 is overlarge, the safety valve is opened.

Referring to fig. 2 and 4, an annular partition plate 44 is fixedly arranged at one end of the inner cavity of the upper header 4 close to the boiler shell 1, the partition plate 44 is positioned between the ring where the outer pipe 32 is located and the ring where the inner pipe 33 is located, a connecting ring 45 is welded at one end of the partition plate 44 facing away from the boiler shell 1, the outer diameter of the connecting ring 45 is larger than the inner diameter of the upper header 4, and the outer diameter of the connecting ring 45 is equal to the outer diameter of the partition plate 44. An external ring 46 is fixedly arranged on the surface of the connecting ring 45, which faces away from the partition plate 44, and the external ring 46 has an outer diameter larger than that of the partition plate 44 and an inner diameter larger than that of the connecting ring 45. An upper spacer ring 47 is welded on the surface of the external connection ring 46, which is opposite to the connection ring 45, and the outer diameter of the upper spacer ring 47 is smaller than the outer diameter of the partition plate 44 and larger than the inner diameter of the external connection ring 46. The upper spacer ring 47, the external ring 46, the connecting ring 45 and the partition plate 44 are coaxial with the upper header 4.

Referring to fig. 2 and 4, a water inlet device 31 is fixed on the outer side of the external ring 46, the water inlet device 31 includes a water inlet connector 311 penetrating through the upper header 4, a flange connector is fixed at one end of the water inlet connector 311 located on the outer side of the upper header 4, a check valve 312 communicated with the inner cavity of the water inlet connector 311 is fixed at one end of the water inlet connector 311 located in the inner cavity of the upper header 4, a water inlet pipe 313 communicated with the outlet end of the check valve 312 is fixed on the check valve 312, the side surface of the water inlet pipe 313 is welded on the surface of the external ring 46 facing the boiler shell 1, and a plurality of water inlet holes are formed in the side. The lateral surface of the water inlet pipe 313 is welded with a connecting rod 314, and the lateral surface of the connecting rod 314 is welded and fixed with the medial surface of the upper header 4.

Referring to fig. 2 and 4, a steam-water isolating device 43 is fixedly arranged in the inner cavity of the upper header 4, the steam-water isolating device 43 comprises an isolating plate fixed on an upper spacer ring 47, the outer diameter of the isolating plate is equal to the outer diameter of the upper spacer ring 47, and the inner side surface of the isolating plate is fixed on the inner wall of the upper header 4.

Referring to fig. 2 and 4, water in the water inlet joint 311 enters the water inlet pipe 313 through the one-way valve 312, water in the water inlet pipe 313 enters the cavity of the upper header 4, the water continuously flows into the outer pipe 32, water in the outer pipe 32 enters the lower header 2, water in the lower header 2 enters the cavity defined by the partition plate 44, the connecting ring 45, the upper partition ring 47 and the steam-water isolating device 43 through the inner pipe 33, steam enters the steam-water isolating device 43 in the upper header 4 through the steam-water isolating device 43 and faces away from the upper surface of the boiler housing 1, a gas chamber is arranged above the surface of the steam-water isolating device 43 facing away from the boiler housing 1, and a water chamber is arranged below the surface of the steam-water isolating device 43 facing the boiler housing 1.

Referring to fig. 2 and 4, a sewage discharging device 19 is disposed outside the steam-water isolating device 43, the sewage discharging device 19 includes a sewage discharging loop 191 welded to the upper spacer ring 47, the cross section of the sewage discharging loop 191 is circular, a sewage discharging inlet hole 1911 is disposed on a side surface of the sewage discharging loop 191 facing away from the boiler housing 1, and a plurality of sewage discharging inlet holes 1911 are disposed at intervals along the circumferential direction of the sewage discharging loop 191. A sewage connecting pipe 192 communicated with the inner cavity of the sewage ring pipe 191 is welded on the sewage ring pipe 191, the sewage connecting pipe 192 extends out of the upper header 4, and a flange joint is welded at one end of the sewage connecting pipe 192 extending out of the upper header 4.

Referring to fig. 2, a steam joint 16 communicated with the inner cavity of the upper header 4 is fixedly arranged on the surface of the upper header 4 opposite to the boiler shell 1, and hot gas in the upper header 4 is discharged from the upper header 4 through the steam joint 16 and is conveyed into a pipeline connected with the steam joint 16.

Referring to fig. 2, a steam-water separation device 42 is arranged above the inner cavity of the upper header 4, and the steam-water separation device 42 can separate water in the upper header 4 from steam, so that the moisture content of hot gas entering the steam joint 16 is reduced, and the dryness of the steam is high.

Referring to fig. 2, a burner 12 is disposed inside the upper header 4, a burner tube 121 is disposed at one end of the burner 12 facing the boiler casing 1, a plurality of burner ports are disposed on a side surface of the burner tube 121, and a heat insulating material covering the surface of the lower header 2 facing the boiler casing 1 is laid in the lower header 2.

Referring to fig. 2, a water drainage joint 13 with a center line flush with the surface of the boiler shell 1 facing the lower header 2 is welded on the side surface of the boiler shell 1, one end of the water drainage joint 13 is communicated with the inner cavity of the boiler shell 1, and the other end of the water drainage joint 13 extends out of the boiler shell 1 and is lower than the bottom wall of the boiler shell 1.

Referring to fig. 2, a pressure release joint 15 communicated with the inner cavity of the upper header 4 is fixedly arranged on the surface of the upper header 4 opposite to the boiler shell 1.

Referring to fig. 5, the condensing unit 5 is connected to the smoke evacuation connector 11, the condensing unit 5 includes a condensing tank 51 disposed on the ground, and the condensing tank 51 is a square housing. An air inlet joint 52 is welded on the condensing box 51, one end of the air inlet joint 52 is communicated with the inner cavity of the condensing box 51, and the other end of the air inlet joint 52 is positioned outside the condensing box 51 and is connected with the smoke exhaust joint 11 through a flange.

Referring to fig. 5, a partition plate 53 is provided in an inner cavity of the condenser case 51, the partition plate 53 partitions the inner cavity of the condenser case 51 into a heat exchange cavity and a duct cavity, the partition plate 53 includes a lower plate 531 provided in a vertical direction, a gap is provided between a lower surface of the lower plate 531 and a bottom wall of the condenser case 51, and an upper plate 532 positioned on a top wall of the condenser case 51 is integrally provided on an upper surface of the lower plate 531. The air inlet joint 52 is communicated with the inner cavity of the heat exchange cavity. Two rows of main pipes 54 which are oppositely arranged are arranged in the heat exchange cavity, the main pipes 54 are arranged along the vertical direction, a plurality of heat exchange pipes 55 which are communicated with the inner cavities of the main pipes 54 are fixed on the side surfaces of the main pipes 54, two ends of each heat exchange pipe 55 are respectively communicated with the inner cavities of the two main pipes 54 which are oppositely arranged on the two rows of main pipes 54, each heat exchange pipe 55 is a finned pipe, and each heat exchange pipe 55 is a silicon-magnesium. One row of the main pipes 54 is fixed with a water inlet pipe 56 which is positioned at one end of the main pipe 54 back to the air inlet joint 52 and is communicated with the inner cavity of the main pipe, and the other row of the main pipes 54 is fixed with a water outlet pipe 57 which is positioned at one end of the main pipe 54 close to the air inlet joint 52 and is communicated with the inner cavity of the main pipe. The water inlet pipe 56 is communicated with an outer check valve 561. The water outlet pipe 57 is connected to the water inlet connector 311 of the boiler case 1 through a pipe, thereby increasing the temperature of water introduced into the water inlet pipe 313.

Referring to fig. 1 and 5, a discharge pipe 58 communicating with an inner cavity of the condensation tank 51 is fixed to a bottom wall thereof. The opening of one end of the discharge pipe 58 extending out of the inner cavity of the condensation box 51 is downward and is lower than the bottom wall of the condensation box 51, a treatment box 59 is arranged on the outer side of one end of the discharge pipe 58 far away from the condensation box 51, and water with the liquid level above the port of the discharge pipe 58 is arranged in the treatment box 59.

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

Claims (8)

1. A circulating condensing boiler comprising a boiler housing (1) arranged in a vertical direction, characterized in that: a lower header (2) with a hollow circular structure is arranged at the upper end of the boiler shell (1), an upper header (4) with a hollow circular structure is arranged at the lower end of the boiler shell (1), a burner (12) is arranged on the upper header (4), a combustion pipe (121) positioned in the boiler shell (1) is fixedly arranged at one end, facing the lower header (2), of the burner (12), and a disc (23) is fixedly arranged on the inner wall of one end, facing away from the boiler shell (1), of the lower header (2);

the heat exchange tube (3) communicated with the lower header (2) and the upper header (4) is fixedly arranged on the lower header (2), the heat exchange tube (3) comprises an outer tube (32) and an inner tube (33), the two ends of the outer tube are respectively communicated with the inner cavities of the lower header (2) and the upper header (4), the inner tube (33) is positioned on the inner side of the outer tube (32), and a water inlet device (31) is connected onto the inner tube (33);

the water inlet device (31) comprises a water inlet connector (311) penetrating into the upper header (4), the water inlet connector (311) is communicated with a fixedly arranged one-way valve (312), the one-way valve (312) is communicated with a water inlet pipe (313), and the side surface of the water inlet pipe (313) is provided with a water inlet hole;

the outer pipe (32) comprises a plurality of sewer pipes (321) with two ends respectively communicated with the inner cavities of the upper header (4) and the lower header (2), the sewer pipes (321) are uniformly distributed at intervals along the circumferential direction of the lower header (2), an outer plate (322) is welded between every two adjacent sewer pipes (321), and one side of the outer pipe (32) back to the smoke exhaust joint (11) is provided with an outer opening (323) for accommodating smoke to pass through;

the inner pipe (33) comprises a plurality of upper water pipes (331) communicated with the inner cavities of the lower header (2) and the upper header (4), the upper water pipes (331) are uniformly distributed at intervals along the circumferential direction of the lower header (2), an inner plate (332) is welded between every two adjacent upper water pipes (331), and one side, facing the smoke exhaust joint (11), of the inner pipe (33) is provided with an inner opening (333) for accommodating smoke to pass through;

an annular partition plate (44) is fixedly arranged at one end, close to the boiler shell (1), of the inner cavity of the upper header (4), the partition plate (44) is located between a circular ring where the outer pipe (32) is located and a circular ring where the inner pipe (33) is located, an upper partition ring (47) is fixedly arranged at one end, facing away from the boiler shell (1), of the partition plate (44), a steam-water separation device (42) is fixedly arranged on the upper partition ring (47), a water chamber is arranged on the surface, facing towards the boiler shell (1), of the steam-water separation device (42), a steam chamber is arranged on the surface, facing away from the boiler shell (1), of the steam-water separation device (42), and the steam-water separation device (42) is arranged above the inner cavity of the upper header;

and a steam joint (16) communicated with the inner cavity of the upper header (4) is fixedly arranged on the surface of the upper header (4) back to the boiler shell (1).

2. A circulating condensation boiler according to claim 1, characterized in that: the water inlet pipe (313) is an annular pipe.

3. A circulating condensation boiler according to claim 1, characterized in that: and a drainage joint (13) communicated with the inner cavity of the boiler shell (1) is fixed on the side surface of the boiler shell.

4. A circulating condensation boiler according to claim 1, characterized in that: and heat insulation substances for covering the lower header (2) towards the surface of the boiler shell (1) are laid in the lower header (2).

5. A circulating condensation boiler according to claim 1, characterized in that: the sewage draining device is characterized in that a sewage draining device (19) located outside the steam-water isolating device (43) is arranged in the upper header (4), the sewage draining device (19) comprises a sewage draining ring pipe (191) fixed in the upper header (4), the sewage draining ring pipe (191) is located at the bottom of the upper header (4) with liquid water, a sewage draining water inlet hole (1911) is formed in the side face of the sewage draining ring pipe (191), a sewage draining connecting pipe (192) communicated with the inner cavity of the sewage draining ring pipe (191) is fixedly arranged on the sewage draining ring pipe (191), and one end, far away from the sewage draining ring pipe (191), of the sewage draining connecting pipe (192) extends out.

6. A circulating condensation boiler according to claim 1, characterized in that: and a safety valve joint (17) communicated with the inner cavity of the upper header (4) is fixedly arranged on the surface of the upper header (4) back to the boiler shell (1).

7. A circulating condensation boiler according to claim 1, characterized in that: two smoke baffles (34) positioned at the two sides of the smoke exhaust joint (11) along the circumferential direction of the boiler shell (1) are fixedly arranged on the outer pipe (32).

8. A circulating condensation boiler according to claim 1, characterized in that: go up water pipe (331) cover and be equipped with protective sheath (35), protective sheath (35) are located inner opening (333) department and follow two water pipe (331) of inner tube (33) circumference.

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