CN211451403U - Central type condensation hot water boiler - Google Patents

Abstract

The utility model discloses a central formula condensation boiler, including outer barrel, barrel inside is provided with the stove courage outside, stove courage one end is provided with the combustor and takes over, combustor take over a week is provided with first basin, the back tube sheet is connected to the stove courage other end, back tube sheet outer connection has the second basin that corresponds with first basin, it has first finned tube to be provided with around the stove courage, stove courage below is provided with the condenser, the condenser includes multirow second finned tube, the stove courage passes through the division board with the condenser and separates, division board one side is provided with the blow vent, be provided with the guide plate in the stove courage, the blow vent is connected to the guide plate, first finned tube and second finned tube both ends communicate first basin and second basin respectively, second basin top is connected with the outlet pipe seat, second basin top is connected with the return pipe seat, the backplate of second basin below is connected with the outlet flue. The utility model discloses it is little to take up an area of the space, simple to operate.

Description

Central type condensation hot water boiler

Technical Field

The utility model relates to a boiler technical field, concretely relates to central formula condensation boiler.

Background

In a traditional boiler, the exhaust gas temperature is generally 160-250 ℃, water vapor in the exhaust gas is still in an overheated state and cannot be condensed into liquid water to release latent heat of vaporization. As is well known, the thermal efficiency of a boiler is calculated by the lower heating value of fuel, and the heat loss of latent heat of vaporization in the upper heating value of fuel is not considered. Therefore, the heat efficiency of the traditional boiler can only reach 87 to 91 percent generally. The condensing waste heat recovery boiler reduces the temperature of the exhaust gas to 50-70 ℃, and fully recovers the sensible heat in the exhaust gas and the condensation latent heat of water vapor. The volume component of water vapor in the condensation waste heat recovery boiler flue gas taking natural gas as fuel is generally 15-19%, the water vapor content in the oil-fired boiler flue gas is 10-12%, and the water vapor content is far higher than that in the flue gas of dust produced by a coal-fired boiler and is less than 6%. At present, the thermal efficiency of a boiler is calculated by low-level calorific value, and although the thermal efficiency is nominally higher, the actual energy utilization rate is still to be improved because the difference between the high-level calorific value and the low-level calorific value of natural gas is about 10%. In order to fully utilize energy, reduce exhaust gas temperature and recover physical heat energy of flue gas, a condenser is generally arranged at a flue outlet of a boiler, a steel-aluminum finned tube heat exchanger formed by rolling stainless steel and aluminum tubes is used for condensing the interior of the boiler, when the wall temperature of the heat exchanger is lower than the dew point temperature of the flue gas, water vapor in the flue gas is condensed, latent heat is released, and 10% of high-low heating capacity difference can be effectively utilized. The existing vacuum boiler mainly adopts the mode that a waste heat recovery device is additionally arranged outside the vacuum boiler, so that the field installation is troublesome, the occupied space is large, and the operation is difficult.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an integration condensation boiler, the occupation of land space is little, simple to operate.

In order to solve the technical problem, the utility model provides a central condensing hot water boiler, which comprises an outer cylinder body, a boiler furnace is arranged in the outer cylinder body, one end of the boiler furnace is provided with a burner connecting pipe, a first water tank is arranged around the burner connecting pipe, the other end of the boiler furnace is connected with a rear tube plate, the outside of the rear tube plate is connected with a second water tank corresponding to the first water tank, a first finned tube is arranged around the boiler furnace, a condenser is arranged below the boiler furnace, the condenser comprises a plurality of rows of second finned tubes, the boiler furnace and the condenser are separated by a separation plate, one side of the separation plate is provided with a vent, a guide plate is arranged in the boiler furnace, the guide plate is connected with the vent, two ends of the first finned tube and the second finned tube are respectively communicated with the first water tank and the second water tank, a water outlet tube seat is connected above the, the upper part of the second water tank is connected with a water return pipe seat, the rear baffle plate below the second water tank is connected with a smoke outlet, and the outlet of the condenser is communicated with the smoke outlet.

Furthermore, the first finned tube and the second finned tube are closely arranged, and fins of the adjacent finned tubes are arranged in a staggered mode.

Furthermore, the second finned tubes are provided with three layers, and the number of the second finned tubes in each layer is sequentially reduced from top to bottom.

Further, first finned tube and second finned tube all include parent tube, fin and a pair of clamping piece, the fin cover is in on the parent tube, the clamping piece centre gripping fin and parent tube, the clamping piece includes connecting rod, broach and semi-ring, semi-ring connect in the connecting rod both ends, the broach set up in connecting rod one side, the broach with fin interval one-to-one, two the clamping piece centre gripping relatively in parent tube both sides and locking.

Furthermore, the inner diameter of the half ring is larger than the inner diameter of the finned tube and smaller than the outer diameter of the base tube, and the distance from the top of the comb teeth to the central axis of the finned tube is smaller than the radius of the fin.

Furthermore, the inner surface of the semi-ring is provided with a non-slip mat.

Further, the length of the comb teeth is smaller than the height of the fins.

Furthermore, the end part of the comb tooth is provided with a connecting groove, and the dust removal block is connected with the connecting groove through a connecting block.

The utility model discloses a central formula condensation boiler compares beneficial effect with prior art is, and occupation of land space is little, simple to operate.

Drawings

FIG. 1 is a side view of the overall structure of the present invention;

fig. 2 is a cross-sectional view of the overall structure of the present invention;

FIG. 3 is a schematic view of the finned tube construction of the present invention;

fig. 4 is a schematic view of the comb structure of the present invention.

Detailed Description

The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.

Referring to fig. 1 and 2, for the purpose of illustrating an embodiment of a central condensation hot water boiler according to the present invention, the condensation hot water boiler in the present embodiment includes an outer cylinder 10, a furnace pipe 20 is disposed inside the outer cylinder 10, a burner pipe 21 is disposed at one end of the furnace pipe 20, the burner pipe 21 communicates with the furnace pipe 20, and high temperature flue gas is sent into the furnace pipe 20 through the burner pipe 21. The other end of the furnace pipe 20 is connected with a rear tube plate 22, and high-temperature flue gas can stay in the furnace pipe 20. The first finned tube 30 is arranged around the furnace pipe 20, and water flow in the first finned tube 30 absorbs heat of high-temperature flue gas in the furnace pipe 20 for heating. The combustor adapter tube 21 is provided with a first water tank 11 in a circle, the rear tube plate 22 is externally connected with a second water tank 12 corresponding to the first water tank 11, two ends of the first finned tube 30 are respectively communicated with the first water tank 11 and the second water tank 12, the flow velocity and flow of water flow in the first finned tube 30 are adjusted through the first water tank 11 and the second water tank 12, the first finned tube 30 is guaranteed to be heated uniformly, and loss of a heat value of fuel gas is reduced. After the heat absorption of the high-temperature flue gas by the first finned tube 30, the temperature is reduced to 150-. The furnace pipe 20 and the condenser 40 are separated by a partition plate 41, so that high-temperature flue gas cannot directly enter the condenser 40, and the condenser 40 is arranged below the furnace pipe 20 because the high-temperature flue gas is easy to diffuse upwards. A vent 42 is arranged on one side of the partition plate 41, a guide plate 43 is arranged in the furnace pipe 20, the guide plate 43 is connected with the vent 42, and after the heat of the high-temperature flue gas is fully absorbed by the first finned tube 30, the flue gas passes through the vent 42 under the guide of the guide plate 43 and enters the condenser 40. The condenser 40 includes a plurality of rows of second finned tubes 44, the flue gas passes between the rows of second finned tubes 44, and the second finned tubes 44 fully absorb the residual heat of the flue gas. The two ends of the second finned tube 44 are respectively communicated with the first water tank 11 and the second water tank 12, the flow speed and the flow of water flow in the second finned tube 44 are adjusted through the first water tank 11 and the second water tank 12, the second finned tube 44 is uniformly heated, and the residual heat of smoke is fully absorbed. The water outlet pipe seat 13 is connected above the second water tank 12, the water return pipe seat 14 is arranged below, and the water outlet pipe seat 13 is arranged above, so that cold water can firstly absorb residual heat of smoke to preheat, then water flows upwards to the first finned pipe 30 to fully absorb heat to be heated, and finally the cold water flows out of the water outlet pipe seat 13. The high-temperature flue gas passes through the condenser 40 from the upper furnace pipe 20, the cooled flue gas continuously sinks, so that the rear baffle plate below the second water tank 12 is connected with a flue gas outlet 50, the outlet of the condenser 40 is communicated with the flue gas outlet 50, the flue gas passes through the condenser 40 and flows out through the flue gas outlet 50, and the temperature of the flowing flue gas is only 40-50 ℃. In order to enable the flue gas to fully surround the finned tubes when passing through the finned tubes, the first finned tubes 30 and the second finned tubes 44 are closely arranged, fins of adjacent finned tubes are arranged in a staggered mode, the flue gas flowing path is tortuous, the contact time with the finned tubes is long, and the heat of the flue gas is fully absorbed.

In this embodiment, the second finned tubes 44 are provided with three layers according to the space between the furnace pipe 20 and the flue, and since the diameter of the furnace pipe 20 is large, the diameter of the flue is small, and the condenser 40 is of a structure with a large top and a small bottom, the number of the second finned tubes 44 on each layer is sequentially reduced from top to bottom so as to match the shape of the condenser 40.

Referring to fig. 3, each of the first fin tube 30 and the second fin tube 44 includes a base tube 31, fins 32 and a pair of clamping pieces 33, the fins 32 are sleeved on the base tube 31, the clamping pieces 33 clamp the fins 32 and the base tube 31, the clamping pieces 33 include a connecting rod 331, comb teeth 332 and half rings 333, the half rings 333 are connected to two ends of the connecting rod 331, the comb teeth 332 are disposed on one side of the connecting rod 331, the comb teeth 332 are in one-to-one correspondence with the fins 32 of the fin tubes at intervals, the comb teeth 332 are clamped at the intervals of the fins 32, the half rings 333 are sleeved on the outer wall of the base tube 31, and when the positions of the half rings 333 are fixed, the fins 32 are. In order to fix the positions of the half rings 333, the two clamping pieces 33 are clamped and locked on two sides of the base tube 31, the two half rings 333 are combined into a whole ring and fastened and locked on the outer wall of the base tube 31, the positions of the clamping pieces 33 are fixed, and the fins 32 are clamped towards the base tube 31, so that the fins 32 are tightly connected with the base tube 31.

As a preferable technical solution of this embodiment, the inner diameter of the half rings 333 is larger than the inner diameter of the base pipe 31 and smaller than the outer diameter of the base pipe 31, when the two half rings 333 are fastened together, they can be tightly connected to the base pipe 31, the distance from the top of the comb teeth 332 to the central axis of the finned pipe is smaller than the radius of the fin 32, and when the two clamping pieces 33 are locked, the connecting rod 331 applies a force toward the center of the base pipe 31 to the fin 32, thereby achieving the purpose of clamping the fin 32. Further, in order to prevent the half ring 333 from moving axially along the base pipe 31, the inner surface of the half ring 333 is provided with a non-slip pad 334.

Referring to fig. 4, the length of the comb teeth 332 is smaller than the height of the fins 32, so that the comb teeth 332 obstruct the top of the upper fins 32, and there is a gap between the end of the comb teeth 332 and the base pipe 31, i.e. the space between the fins 32 is communicated, which does not affect the flow of the flue gas. Further, in order to conveniently clean the finned tube, the end part of the comb teeth 332 is provided with a connecting groove 335, and a dust removing block 336 is connected with the connecting groove 335 through a connecting block. The clamp 33 can rotate around the finned tube by loosening the connection of the two half rings 333, and the dust removing block 336 can clean the fins 32 during the rotation of the clamp 33 because the dust removing block 336 is inserted between the two adjacent fins 32.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.

Claims (8)

1. A central condensing hot water boiler is characterized by comprising an outer barrel, a boiler furnace is arranged in the outer barrel, a burner connecting pipe is arranged at one end of the boiler furnace, a first water tank is arranged in one circle of the burner connecting pipe, the other end of the boiler furnace is connected with a rear tube plate, a second water tank corresponding to the first water tank is connected outside the rear tube plate, a first finned tube is arranged around the boiler furnace, a condenser is arranged below the boiler furnace and comprises a plurality of rows of second finned tubes, the boiler furnace and the condenser are separated by a partition plate, a vent hole is arranged on one side of the partition plate, a guide plate is arranged in the boiler furnace and connected with the vent hole, two ends of the first finned tube and the second finned tube are respectively communicated with the first water tank and the second water tank, a water outlet tube seat is connected above the second water tank, the upper part of the second water tank is connected with a water return pipe seat, the rear baffle plate below the second water tank is connected with a smoke outlet, and the outlet of the condenser is communicated with the smoke outlet.

2. A center type condensing hot water boiler as claimed in claim 1, wherein said first fin tube and said second fin tube are closely arranged, and fins of adjacent said fin tubes are staggered.

3. The central condensing hot water boiler as claimed in claim 1, wherein said second fin tubes are provided in three layers, the number of said second fin tubes in each layer being decreased from top to bottom.

4. The central condensing hot water boiler according to claim 1, wherein each of the first and second finned tubes comprises a base tube, a fin, and a pair of clamping pieces, the fin is sleeved on the base tube, the clamping pieces clamp the fin and the base tube, the clamping pieces comprise a connecting rod, comb teeth, and semi-rings, the semi-rings are connected to two ends of the connecting rod, the comb teeth are disposed on one side of the connecting rod, the comb teeth and the fins are in one-to-one correspondence with each other at intervals, and the two clamping pieces are clamped on two sides of the base tube and locked with each other.

5. The central condensing hot water boiler according to claim 4, wherein the inner diameter of said half rings is larger than the inner diameter of said finned tube and smaller than the outer diameter of said base tube, and the distance from the tops of said comb teeth to the central axis of said finned tube is smaller than the radius of said fin.

6. The central condensing hot water boiler as claimed in claim 4, wherein the inner surfaces of the half rings are provided with non-slip mats.

7. A central condensing hot water boiler according to claim 4, wherein the length of said comb teeth is smaller than the height of said fins.

8. The central condensing hot water boiler as claimed in claim 7, wherein the ends of the comb teeth are provided with connecting grooves, and the dust removing blocks are connected to the connecting grooves by connecting blocks.

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