CN218480761U - Energy-saving condenser and full-flow stainless steel heat exchanger vacuum phase change boiler - Google Patents

Abstract

The utility model discloses an energy-saving condenser and a vacuum phase-change boiler of a full-flow stainless steel heat exchanger, wherein the energy-saving condenser comprises a condenser main body and a plurality of communicating headers; the condenser main body comprises a condenser tube plate and a plurality of finned tubes, each finned tube is a first heat exchange group which is arranged side by side and forms a plurality of first circulation directions and a plurality of second heat exchange groups in a plurality of second circulation directions, each first heat exchange group and each second heat exchange group are alternately communicated, and a medium circulation channel is formed by the first heat exchange groups and the second heat exchange groups and the communicating header; the communicating header consists of a semi-arc header pipe and a semi-elliptical head. The condenser main body of the energy-saving condenser comprises a heat exchange group consisting of a plurality of finned tubes, the communicating header comprises semi-arc header tubes and a semi-elliptical head, and the communicating header is reasonably arranged according to the flow of media in the tubes to form a structure through which full-flow media pass, so that the energy-saving effect of the condenser can be effectively improved, the smoke exhaust temperature is reduced, and the thermal efficiency of the vacuum phase-change boiler is further improved.

Description

Energy-saving condenser and full-flow stainless steel heat exchanger vacuum phase change boiler

Technical Field

The utility model relates to a vacuum boiler technical field, concretely relates to energy-conserving condenser and full flow stainless steel heat exchanger vacuum phase transition boiler.

Background

The vacuum boiler is a hot water boiler, which forms a negative pressure vacuum environment in a closed furnace body, fills heat medium water in the machine body, heats the heat medium water through combustion or other modes, evaporates and condenses the heat medium water to a heat exchanger, and heats water to be heated by the heat exchanger. The vacuum boiler is formed by a special design structure, can be used for multiple purposes, simultaneously provides multiple paths of hot water with different temperature differences, meets multiple requirements of hot water supply of a central air conditioner, heating, sanitary hot water, a high-grade swimming pool, a hotel and the like of a user, and can also provide process water for various industrial and mining enterprises.

Generally, the heat exchanger of the vacuum phase-change boiler comprises a vacuum phase-change heat exchanger inside and outside the boiler and an energy-saving condensing heat exchanger at the tail part. The vacuum phase change heat exchangers inside and outside the furnace are basically copper tube heat exchangers and stainless steel tube heat exchangers, the two sides of each vacuum phase change heat exchanger are square water chambers, the energy-saving condensation heat exchanger at the tail of the vacuum phase change boiler is basically a carbon steel high-frequency welding finned tube or an ND steel high-frequency welding finned tube, and the two ends of each serpentine tube are manufactured into high-frequency welding finned tubes which are respectively connected into an inlet and outlet header, so that the medium flow in the energy-saving condensation heat exchanger is about 1/3 of the flow of the vacuum phase change heat exchanger.

Among the above-mentioned conventional art, to the inside and outside vacuum phase transition heat exchanger of stove, vacuum phase transition heat exchanger's heat exchange tube material is the copper pipe, and the price is expensive, and purchasing cost is high, and the phase transition heat exchanger who adopts stainless steel pipe, its stainless steel pipe adopts welding process with the tube sheet, and stainless steel pipe is in large quantity, has that welding work load is great, intensity of labour is higher, work efficiency is lower, the manufacturing period is longer scheduling problem. The phase change heat exchanger of the vacuum phase change boiler belongs to a pressure-bearing part, the general design pressure is not more than 1.6MPa, the two sides are of square water chamber structures, the pressure-bearing of the heat exchanger is not facilitated, the plate is large in use thickness, and the consumption of steel materials is increased.

For the energy-saving condensing heat exchanger at the tail part, the energy-saving condensing heat exchanger adopts a snakelike high-frequency welding finned tube, the welding rate of fins and a base tube is less than or equal to 90%, the welding seam is easy to crack when cold and hot are frequently alternated, the heat transfer effect and the service life of the heat exchanger are influenced, the snakelike tube is welded with an inlet and outlet header, the heat exchanger cannot be in a full-flow structure due to the limitation of flue gas flow velocity and heat exchange area, the medium flow in the tube is about 1/3 of the flow of the vacuum phase-change heat exchanger, the heat efficiency of the vacuum boiler cannot be effectively improved, and the current energy-saving and environment-friendly requirements cannot be met.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide an energy-saving condenser, solve the above-mentioned traditional problem, have a structure that the full flow medium passes through, can effectively improve the energy-saving effect of condenser, reduce the exhaust gas temperature, thereby further improving the thermal efficiency of vacuum phase change boiler.

The utility model discloses a second aim at provides an adopt this energy-conserving condenser's full flow stainless steel heat exchanger vacuum phase change boiler.

The utility model discloses one of the purpose adopts following technical scheme to realize:

an energy-saving condenser comprises a condenser main body and a plurality of communicated headers which are arranged at two opposite ends of the condenser main body; the condenser main body comprises a condenser tube plate and a plurality of finned tubes arranged on the condenser tube plate, each finned tube is a first heat exchange group which is arranged side by side and forms a plurality of first circulation directions and a plurality of second heat exchange groups in a plurality of second circulation directions, and each first heat exchange group and each second heat exchange group are alternately communicated and arranged and form a medium circulation channel with the communicating header; the communicating header is composed of a semi-arc header pipe and a semi-elliptical head.

Preferably, each finned tube is arranged in a vertically staggered manner.

Preferably, the finned tube is a straight-section laser welding finned tube, and the straight-section laser welding finned tube and the condensing tube plate are in expanded joint.

Preferably, the energy-saving condenser is further provided with an inlet header and an outlet header, the inlet header is provided with an inlet pipeline, the outlet header is provided with an outlet pipeline, the inlet header is provided with a semi-arc header pipe, and the outlet header is provided with an outlet pipeline.

The utility model discloses the second adopts following technical scheme to realize:

the utility model provides a full flow stainless steel heat exchanger vacuum phase transition boiler, includes the furnace body, sets up combustion chamber, phase transition heat exchanger, back smoke box and the condenser in the furnace body, the combustion chamber with the back smoke box is linked together, the phase transition heat exchanger is located the top of combustion chamber, the back smoke box is located the rear of combustion chamber, the inlet fume of condenser with the back smoke box is linked together, the condenser is the aforesaid energy-conserving condenser.

Preferably, the phase change heat exchanger comprises a phase change heat exchange tube group, a phase change heat exchange tube plate, a phase change water chamber, a water chamber flange and a flange cover; the phase change heat exchange tube set consists of a plurality of stainless steel heat exchange tubes; the phase-change heat exchange tube plate, the phase-change water chamber, the water chamber flange and the flange cover are all of elliptical structures.

Preferably, the stainless steel heat exchange tube and the phase change heat exchange tube plate are in expanded connection.

Preferably, the flange cover is provided with a water inlet connecting pipe, and the water inlet connecting pipe is connected with an outlet pipeline of the energy-saving condenser.

Preferably, the vacuum phase-change boiler of the full-flow stainless steel heat exchanger further comprises a front smoke box, the combustion chamber comprises a furnace mouth, a furnace pipe and a combustion chamber, two return-stroke smoke pipes are arranged between the combustion chamber and the front smoke box, and three return-stroke smoke pipes are arranged between the front smoke box and the rear smoke box.

Preferably, a sewage draining outlet is formed in the tail end of the combustion chamber; and a smoke outlet of the energy-saving condenser is provided with a condensed water discharge outlet.

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

1. the utility model discloses an energy-conserving condenser is through being equipped with condenser main part and intercommunication collection case, and the condenser main part constitutes the heat transfer group with a plurality of finned tubes, and the intercommunication collection case adopts half arc header pipe and half oval head to constitute, and the intercommunication collection case carries out rational arrangement according to the flow of intraductal medium, forms the structure that the full flow medium passes through, can improve the energy-conserving effect of condenser effectively, reduces exhaust temperature to further improve vacuum phase change boiler's thermal efficiency.

2. The utility model discloses an energy-conserving condenser adopts the laser welding straight tube finned tube, and the laser welding straight tube finned tube adopts expanded joint technology with the tube sheet at both ends, and the fin welds the rate 100% with the parent tube, and the penetration is less than or equal to 0.2mm, belongs to the penetration welding, more is applicable to frequent cold and heat exchange, can effectively improve its life, can reach more than 20 years.

3. The utility model discloses a heat exchange tube material is nonrust steel pipe among full flow stainless steel heat exchanger vacuum phase change boiler's the phase change heat exchanger, and nonrust steel pipe adopts the expanded joint technology with the tube sheet, can improve work efficiency widely, and the oval structure is adopted at phase change heat exchanger both ends, has not only solved the pressure-bearing structure problem, has reduced the thickness that panel used moreover widely, has reduced the consumption of steel.

4. The utility model discloses a full flow stainless steel heat exchanger vacuum phase change boiler has set up two return strokes tobacco pipes and three return strokes tobacco pipes, through a plurality of return strokes tobacco pipes, makes the dwell time of high temperature flue gas in the furnace body longer, can further improve the heat exchange efficiency of high temperature flue gas and the heat medium water in the furnace body.

Drawings

FIG. 1 is a schematic diagram of an energy-saving condenser installed in a vacuum phase-change boiler according to a preferred embodiment of the present invention;

FIG. 2 is a side view of the vacuum phase change boiler shown in FIG. 1;

FIG. 3 is a schematic view of the combustion chamber shown in FIG. 1;

FIG. 4 is a schematic diagram of the phase change heat exchanger shown in FIG. 1;

FIG. 5 is a side view of the phase change heat exchanger shown in FIG. 4;

FIG. 6 is a schematic front view of the economizer condenser shown in FIG. 1;

fig. 7 is a side schematic view of the economizer condenser shown in fig. 1.

In the figure: 100. a vacuum phase change boiler; 10. an energy-saving condenser; 11. a condenser main body; 110. a condenser plate; 111. a finned tube; 12. the collection box is communicated; 120. a semi-arc header pipe; 121. a semi-elliptical head; 13. an inlet header; 14. an outlet header; 15. a smoke outlet; 20. a furnace body; 30. a combustion chamber; 31. a furnace mouth; 32. a furnace pipe; 33. a flashback chamber; 40. a phase change heat exchanger; 41. a phase change heat exchange tube set; 42. a phase change heat exchange tube plate; 43. a phase change water chamber; 430. a water inlet connecting pipe; 44. a water chamber flange; 45. a flange cover; 50. a rear smoke box; 60. a front smoke box; 61. two return smoke pipes; 62. three return stroke smoke pipes.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of indicated technical features is significant. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected to" another element, there are no intervening elements present.

Referring to fig. 1 to 7, an energy-saving condenser 10 according to a preferred embodiment of the present invention is installed in a vacuum phase change boiler 100, and the energy-saving condenser 10 includes a condenser body 11 and a plurality of communicating headers 12 installed at opposite ends of the condenser body 11; the condenser body 11 comprises a condenser tube plate 110 and a plurality of finned tubes 111 arranged on the condenser tube plate 110, each finned tube 111 is a first heat exchange group arranged side by side and forming a plurality of first circulation directions and a plurality of second heat exchange groups in a plurality of second circulation directions, each first heat exchange group and each second heat exchange group are alternately communicated, and a medium circulation channel is formed by the first heat exchange groups and the second heat exchange groups and the communication header 12; the communicating header 12 is composed of a semi-arc header pipe 120 and a semi-elliptical head 121.

The flue gas of the vacuum phase change boiler 100 flows out from the top to the bottom from the gap between the upper, lower, left and right finned tubes 111, and the cold water flows out from the water inlet of the medium circulation channel to the water outlet from the bottom to the top. The first and second flow directions are two directions in which water flows in the medium flow channel, that is, the first flow direction and the second flow direction are opposite to each other, and the water flows in the medium flow channel in a meandering manner. The communicating header 12 is a large-diameter pipeline, two ends of the pipeline are welded with standard elliptical end sockets, then the pipeline is cut into two parts along the longitudinal middle section, and one half of the pipeline is welded on the condensing tube plate 110, so that a header consisting of a semi-arc header tube 120 and a semi-elliptical end socket 121 is formed.

The energy-saving condenser 10 is provided with the condenser main body 11 and the communicating header 12, the condenser main body 11 forms a heat exchange group by the finned tubes 111, the communicating header 12 is formed by the semi-arc header tubes 120 and the semi-elliptical head 121, the communicating header 12 is reasonably arranged according to the flow of media in the tubes, a structure that full-flow media pass is formed, the energy-saving effect of the condenser can be effectively improved, the smoke exhaust temperature is reduced, and the heat efficiency of the vacuum phase-change boiler 100 is further improved.

In one embodiment, as shown in fig. 6-7, the upper and lower finned tubes 111 may be parallel or staggered, and preferably, the finned tubes 111 are staggered up and down, i.e. the finned tubes 111 are parallel in the transverse direction, and the finned tubes 111 are staggered in the longitudinal direction, and the upper finned tube 111 is arranged in the gap between every two lower finned tubes 111, so that the heat exchange effect between the flue gas and the medium in the tubes is better.

Further preferably, the finned tube 111 is a straight-section laser welding finned tube 111, and the straight-section laser welding finned tube 111 and the condensing tube plate 110 are in expansion joint. The laser welding straight tube finned tube 111 and the condensing tube plates 110 at two ends adopt an expansion joint process, the welding rate of the fins and the base tube is 100%, the fusion depth is less than or equal to 0.2mm, the laser welding straight tube finned tube belongs to fusion penetration welding, is more suitable for frequent cold and heat exchange, can effectively prolong the service life of the laser welding straight tube finned tube and can reach more than 20 years.

In another embodiment, the condenser 10 further includes an inlet header 13 disposed at the inlet of the medium flowing channel and an outlet header 14 disposed at the outlet of the medium flowing channel, wherein the inlet header 13 has an inlet pipe on the semi-arc header 120, and the outlet header 14 has an outlet pipe on the semi-arc header 120.

Referring to fig. 1-5 again, the present invention further provides a full flow stainless steel heat exchanger vacuum phase change boiler 100, which comprises a boiler body 20, a combustion chamber 30 disposed in the boiler body 20, a phase change heat exchanger 40, a back smoke box 50 and a condenser, wherein the combustion chamber 30 is communicated with the back smoke box 50, the phase change heat exchanger 40 is disposed above the combustion chamber 30, the back smoke box 50 is disposed behind the combustion chamber 30, a smoke inlet of the condenser is communicated with the back smoke box 50, and the condenser is the above energy saving condenser 10.

Wherein, the furnace body 20 is also provided with a vacuumizing hole position, a hot water input/supplement port position, a control system, an outer packing panel and a plurality of detectors, and the vacuumizing hole position is used for vacuumizing the furnace body 20 to ensure that the inside of the furnace body is in a vacuum state; the heat medium water input/supplement port is used for inputting heat medium water or supplementing heat medium water; the control system is used for controlling the operation of the whole equipment; the outer covering panel is used for covering the surface of the furnace body 20, so that the appearance of the furnace body is more attractive; the detector comprises some detecting instruments such as pressure, temperature, vacuum degree and the like, and carries out safety monitoring on the furnace body 20.

In one embodiment, as shown in fig. 4 to 5, the phase change heat exchanger 40 includes a phase change heat exchange tube group 41, a phase change heat exchange tube plate 42, a phase change water chamber 43, a water chamber flange 44, and a flange cover 45; the phase change heat exchange tube group 41 is composed of a plurality of stainless steel heat exchange tubes; the phase change heat exchange tube plate 42, the phase change water chamber 43, the water chamber flange 44 and the flange cover 45 are all in an elliptical structure. Preferably, the stainless steel heat exchange tubes are expanded with the phase change heat exchange tube plate 42. The heat exchange tube is made of stainless steel tubes, the stainless steel tubes and the tube plates are in expanded joint, working efficiency can be greatly improved, the two ends of the phase change heat exchanger 40 are in an elliptical structure, the problem of a pressure bearing structure is solved, the thickness of used plates is greatly reduced, and consumption of steel is reduced.

Optionally, the phase change water chamber 43 is provided with a water inlet connection pipe 430, and the water inlet connection pipe 430 is connected with an outlet pipeline of the economizer condenser 10. The phase change water chamber 43 at the outlet of the phase change heat exchanger 40 is provided with a water outlet connecting pipe to connect with an external pipeline to output hot water or steam.

In another embodiment, the full-flow stainless steel heat exchanger vacuum phase change boiler 100 further comprises a front smoke box 60, the combustion chamber 30 comprises a fire hole 31, a furnace pipe 32 and a back combustion chamber 33, and the fire hole 31 is used for installing a burner; two return flue tubes 61 are arranged between the combustion chamber 33 and the front flue box 60, and three return flue tubes 62 are arranged between the front flue box 60 and the rear flue box 50. The vacuum phase-change boiler 100 is provided with the two-pass smoke pipe 61 and the three-pass smoke pipe 62, and the residence time of the high-temperature smoke in the boiler body 20 is longer through the multiple-pass smoke pipes, so that the heat exchange efficiency of the high-temperature smoke and the heat medium water in the boiler body 20 can be further improved.

Optionally, the tail end of the combustion chamber 30 is provided with a sewage draining outlet for draining sewage; the smoke outlet 15 of the economizer condenser 10 is provided with a condensate discharge port for discharging condensate therefrom.

The working principle is as follows:

1. a flue gas system: the matched burner is installed on a furnace mouth 31, fuel is fully combusted in a combustion chamber 30, radiation heat exchange is carried out through a furnace pipe 32, heat is transferred to a heat medium water medium on the outer side of the furnace pipe 32, high-temperature smoke passes through a combustion chamber 33 and turns 180 degrees, then convection heat exchange is continuously carried out on the heat medium water through a two-return-stroke smoke pipe 61, the high-temperature smoke enters a front smoke box 60 from back to front and turns 180 degrees again, after the convection heat exchange is completed through a three-return-stroke smoke pipe 62, the high-temperature smoke enters a rear smoke box 50 at the tail part, then the tail smoke passes through a finned tube 111 in an energy-saving condenser 10, after the final heat exchange is completed, the tail smoke passes through a smoke outlet of the energy-saving condenser 10 and is connected to a chimney to be discharged.

2. The water external net circulating system: the circulating water of the external network passes through the external circulating water pump, enters the water inlet of the energy-saving condenser 10, enters the semi-arc header pipe 120 of the inlet header 13, passes through the finned pipes 111 of the first heat exchange set, then passes through the communicating header 12, returns to the finned pipes 111 of the second heat exchange set to form a serpentine flow, namely, flows along the medium circulation channel, then enters the semi-arc header pipe 120 of the outlet header 14, and then flows into the phase-change heat exchanger 40 through the outlet pipeline, so that the full-flow medium passes through the energy-saving condenser 10, finally, the preheated water is in the phase-change heat exchanger 40, absorbs the heat of the heat medium water, and then flows out through the water outlet connecting pipe of the phase-change heat exchanger 40, so that the whole heat exchange is completed, the heat is continuously transmitted out under the action of the circulating pump, and the purpose of supplying heat to the vacuum phase-change boiler 100 is achieved.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. An energy-saving condenser is characterized by comprising a condenser main body and a plurality of communicated headers which are arranged at two opposite ends of the condenser main body; the condenser main body comprises a condenser tube plate and a plurality of finned tubes arranged on the condenser tube plate, each finned tube is a first heat exchange group which is arranged side by side and forms a plurality of first circulation directions and a plurality of second heat exchange groups in a plurality of second circulation directions, and each first heat exchange group and each second heat exchange group are alternately communicated and arranged and form a medium circulation channel with the communicating header; the communicating header is composed of a semi-arc header pipe and a semi-elliptical head.

2. The economizer condenser of claim 1 wherein each of said finned tubes is staggered from top to bottom.

3. The energy-saving condenser of claim 2, wherein the finned tube is a straight section laser welding finned tube, and the straight section laser welding finned tube is in expansion joint with the condensing tube plate.

4. The condenser of claim 1, further comprising an inlet header disposed at the inlet of the medium flowing channel and an outlet header disposed at the outlet of the medium flowing channel, wherein the inlet header has an inlet pipe disposed on the semi-arc header pipe, and the outlet header has an outlet pipe disposed on the semi-arc header pipe.

5. A full-flow stainless steel heat exchanger vacuum phase change boiler is characterized by comprising a boiler body, a combustion chamber, a phase change heat exchanger, a rear smoke box and a condenser, wherein the combustion chamber, the phase change heat exchanger, the rear smoke box and the condenser are arranged in the boiler body, the combustion chamber is communicated with the rear smoke box, the phase change heat exchanger is arranged above the combustion chamber, the rear smoke box is arranged behind the combustion chamber, a smoke inlet of the condenser is communicated with the rear smoke box, and the condenser is the energy-saving condenser according to any one of claims 1-4.

6. The full flow stainless steel heat exchanger vacuum phase change boiler of claim 5, wherein the phase change heat exchanger comprises a phase change heat exchange tube bank, a phase change heat exchange tube plate, a phase change water chamber, a water chamber flange and a flange cover; the phase change heat exchange tube set consists of a plurality of stainless steel heat exchange tubes; the phase-change heat exchange tube plate, the phase-change water chamber, the water chamber flange and the flange cover are all of elliptical structures.

7. The full-flow stainless steel heat exchanger vacuum phase change boiler of claim 6, wherein the stainless steel heat exchange tubes are expanded with the phase change heat exchange tube sheet.

8. The full flow stainless steel heat exchanger vacuum phase change boiler of claim 6, wherein the flange cover is provided with a water inlet connection pipe, and the water inlet connection pipe is connected with an outlet pipeline of the energy-saving condenser.

9. The full-flow stainless steel heat exchanger vacuum phase-change boiler of claim 5, further comprising a front smoke box, wherein the combustion chamber comprises a furnace mouth, a furnace pipe and a back combustion chamber, a two-pass smoke pipe is arranged between the back combustion chamber and the front smoke box, and a three-pass smoke pipe is arranged between the front smoke box and the back smoke box.

10. The full-flow stainless steel heat exchanger vacuum phase change boiler of claim 5, wherein a drain outlet is arranged at the tail end of the combustion chamber; and a smoke outlet of the energy-saving condenser is provided with a condensed water discharge outlet.

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