CN211346430U - Boiler tail gas heat recovery utilizes device - Google Patents
Boiler tail gas heat recovery utilizes device Download PDFInfo
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- CN211346430U CN211346430U CN202020959027.4U CN202020959027U CN211346430U CN 211346430 U CN211346430 U CN 211346430U CN 202020959027 U CN202020959027 U CN 202020959027U CN 211346430 U CN211346430 U CN 211346430U
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Abstract
The utility model discloses a boiler tail gas heat recycling device, which comprises a preheating water tank arranged on a boiler and a main heat exchange tube connected to a smoke exhaust main pipe, wherein the main heat exchange tube is positioned in the preheating water tank; the auxiliary heat exchange tube is communicated with the exhaust tail tube of the main heat exchange tube; the auxiliary heat exchange tube is provided with a rotatable cover plate at the communication position with the tail exhaust tube, the cover plate is connected with a rotating piece, the top of the preheating water tank is provided with a support, and the rotating piece is hinged on the support; the bracket is provided with a magnetic block, and one end of the rotating piece is movably sleeved with the end part of the magnetic block; an electromagnet is arranged below the magnetic block, a thermosensitive switch is arranged in the end part of the main heat exchange tube, and the thermosensitive switch is connected to a loop circuit of the electromagnet; the water inlet pipe is sleeved on the auxiliary heat exchange pipe; by adopting the technical scheme, the recovery rate of the tail gas can be effectively improved, so that the problem of overhigh tail gas emission temperature is reduced.
Description
Technical Field
The utility model relates to a boiler tail gas retrieves technical field, concretely relates to boiler tail gas heat recovery utilizes device.
Background
The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy. The hot water or steam generated in the boiler can directly provide heat energy for industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into electric energy through a generator. The boiler for supplying hot water is called a hot water boiler, is mainly used for life, and has a small amount of application in industrial production. The boiler for generating steam is called as a steam boiler, often called as a boiler for short, and is widely used for thermal power stations, ships, locomotives and industrial and mining enterprises. The prior art discloses a utility model patent with the name of patent number CN201711131179.4, which is a tail gas heat recycling device of a boiler, wherein burning tail gas is discharged through a heat exchange pipe with an S-shaped or spiral structure arranged in a preheating water tank through a smoke exhaust main pipe, and the tail gas is contacted with water in the preheating water tank in the heat exchange pipe to take away the temperature in the tail gas, so that the tail gas capacity can be recycled; because the heat exchange tube is S-shaped or helical structure, the boiler easily produces ash at the in-process of burning, and ash can appear staying when advancing crooked heat exchange tube, has lasted the problem that can block up for a long time, and tail gas can be discharged through the anterior segment tail gas pipe of heat exchange tube this moment to reduced the dwell time of tail gas at the heat exchange tube, easily caused the tail gas exhaust temperature too high, reduced the recycle ratio of tail gas.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the weak point that exists in the above-mentioned technique, provide a boiler tail gas heat recovery utilizes device, aim at solving above-mentioned heat exchange tube and easily cause exhaust emission high temperature after the jam appears, reduce tail gas's recycle rate's problem.
The utility model provides a boiler tail gas heat recycling device, which comprises a preheating water tank arranged on a boiler and a main heat exchange tube connected with a smoke exhaust main pipe, wherein the main heat exchange tube is positioned in the preheating water tank; the heat exchanger also comprises an auxiliary heat exchange pipe, wherein the auxiliary heat exchange pipe is communicated with the tail exhaust pipe of the main heat exchange pipe; a rotatable cover plate is arranged at the communication position of the auxiliary heat exchange tube and the tail exhaust tube, a rotating part is connected to the cover plate, a support is arranged at the top of the preheating water tank, and the rotating part is hinged to the support; a magnetic block is arranged on the bracket, and one end of the rotating piece is movably sleeved with the end part of the magnetic block; an electromagnet is arranged below the magnetic block, a thermosensitive switch is arranged in the end part of the main heat exchange tube, and the thermosensitive switch is connected to a loop circuit of the electromagnet; the heat exchanger also comprises a water inlet pipe, wherein the water inlet pipe is sleeved on the auxiliary heat exchange pipe.
Furthermore, the auxiliary heat exchange tube is arranged at the top of the preheating water tank in a horizontal spiral structure, the water inlet tube is sleeved on the auxiliary heat exchange tube in a horizontal spiral structure, and the water inlet tube is communicated with the preheating water tank.
Further, the main heat exchange tube is of a spiral structure or an S-shaped structure.
Furthermore, the main heat exchange tubes are multiple, one ends of the main heat exchange tubes are communicated with the smoke exhaust main pipe, and the tail exhaust pipes at the ends of the main heat exchange tubes are communicated with the auxiliary heat exchange tubes.
Further, sealing rings are arranged on the front side and the back side of the cover plate.
Further, the one end of rotating the piece with apron fixed connection, the other end of rotating the piece is equipped with the U-shaped hole, the one end of magnetic path is equipped with the guide bar, the guide bar is located the U-shaped is downthehole.
Further, the magnetic block type magnetic block comprises a limiting rod, the limiting rod is connected to the magnetic block, a spring is sleeved on the limiting rod, and one end of the spring abuts against the upper portion of the support.
Compared with the prior art, the method has the following beneficial effects:
the utility model provides a boiler tail gas heat recovery utilizes device, through setting up vice heat exchange tube to the temperature of giving vent to anger of tail pipe on to main heat exchange tube through the temperature sensing switch monitors, thereby the return circuit of switch-on or disconnection electro-magnet, so that the apron can effectively improve the recycle rate of tail gas at the flow direction of main heat exchange tube and vice heat exchange tube according to temperature switching tail gas, appears with the too high problem of reduction exhaust emission temperature.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
FIG. 1 is a schematic view of a boiler tail gas heat recycling device of the present invention;
FIG. 2 is an axial view of the boiler tail gas heat recovery device of the present invention;
FIG. 3 is an axial view of the boiler tail gas heat recovery device of the present invention;
FIG. 4 is a schematic view of a cover plate structure of a boiler tail gas heat recycling device of the present invention;
fig. 5 is a schematic diagram of a local enlargement a of the boiler tail gas heat recycling device of the present invention.
In the figure, 1-boiler; 2-preheating a water tank; 3-a main flue gas exhaust pipe; 4-main heat exchange tubes; 5-auxiliary heat exchange tubes; 6-tail pipe; 7-cover plate; 8-a rotating member; 9-a scaffold; 10-a magnetic block; 11-an electromagnet; 12-a limiting rod; 13-a spring; 20-water inlet pipe; 30-a thermal switch; an 81-U shaped hole; 101-guide bar.
Detailed Description
In order to make the structure and features and advantages of the present invention easier to understand, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:
example 1:
as shown in fig. 1 to 5, the utility model provides a boiler tail gas heat recycling device, which comprises a preheating water tank 2 arranged on a boiler 1 and a main heat exchange tube 4 connected to a smoke exhaust main pipe 3, wherein the main heat exchange tube 4 is positioned in the preheating water tank 2; the heat exchanger also comprises an auxiliary heat exchange tube 5, wherein the auxiliary heat exchange tube 5 is communicated with an exhaust tail tube 6 of the main heat exchange tube 4 so as to recycle the tail gas with higher exhaust temperature; a rotatable cover plate 7 is arranged at the communication position of the auxiliary heat exchange tube 5 and the tail exhaust tube 6, a rotating member 8 is connected to the cover plate 7, a support 9 is arranged at the top of the preheating water tank 2, and the rotating member 8 is hinged to the support 9 so that the rotating member 8 can be rotatably arranged on the support 9; a magnet 10 is arranged on the bracket 9, and one end of the rotating part 8 is movably sleeved with the end part of the magnet 10, so that the rotating part 8 can be driven by the magnet 10 to rotate; an electromagnet 11 is arranged below the magnetic block 10, a thermosensitive switch 30 is arranged in the end part of the main heat exchange tube 4, and the thermosensitive switch 30 is connected to a loop circuit of the electromagnet 11 so as to monitor the temperature of the tail gas in the tail pipe 6 through the thermosensitive switch 30; when the temperature reaches a set value, the thermal switch 30 is connected with a loop circuit of the electromagnet 11, so that the electromagnet 11 is magnetized to attract the magnetic block 10 above, the magnetic block 10 moves downwards to drive the rotating part 8 to rotate, the cover plate 7 closes the outlet of the tail pipe 6, and the air inlet of the auxiliary heat exchange pipe 5 is opened; the heat exchanger also comprises a water inlet pipe 20, wherein the water inlet pipe 20 is sleeved on the auxiliary heat exchange pipe 5 so as to absorb the heat of the tail gas in the auxiliary heat exchange pipe 5 through the cold water in the water inlet pipe 20; by adopting the technical scheme, the auxiliary heat exchange tube 5 is arranged to monitor the air outlet temperature of the exhaust tail tube 6 on the main heat exchange tube 4 through the thermosensitive switch 30, so that the loop circuit of the electromagnet 11 is switched on or off, the cover plate 7 can switch the flow direction of the tail gas in the main heat exchange tube 4 and the auxiliary heat exchange tube 5 according to the temperature, the recovery utilization rate of the tail gas is effectively improved, and the problem of overhigh tail gas emission temperature is solved.
Specifically, the auxiliary heat exchange tube 5 is arranged at the top of the preheating water tank 2 in a horizontal spiral structure, and an air outlet is formed in the end part of the auxiliary heat exchange tube 5 so as to discharge tail gas entering the auxiliary heat exchange tube 5; the water inlet pipe 20 is sheathed on the auxiliary heat exchange pipe 5 in a horizontal spiral structure, the water inlet pipe 20 is communicated with the preheating water tank 2, and the communication part of the water inlet pipe 20 and the preheating water tank 2 is positioned at the air outlet of the auxiliary heat exchange pipe 5; the tail gas with overhigh temperature is recycled by arranging the auxiliary heat exchange tube 5 and the water inlet tube 20 which have horizontal spiral structures; the temperature of the tail gas in the secondary heat exchange pipe 5 is absorbed by cold water in the water inlet pipe 20 to realize further reutilization, so that the conversion and utilization efficiency of the tail gas is improved.
Specifically, the main heat exchange tubes 4 have a spiral structure or an S-shaped structure, so that the time for which the exhaust gas can flow inside the main heat exchange tubes 4 is increased, thereby improving the heat transfer efficiency of the exhaust gas.
Specifically, the number of the main heat exchange tubes 4 is multiple, one end of each of the multiple main heat exchange tubes 4 is communicated with the smoke exhaust main pipe 3, so that the exhaust efficiency of the main heat exchange tubes 4 is improved by adding the main heat exchange tubes 4, and when any one main heat exchange tube 4 is blocked, exhaust can be performed through other main heat exchange tubes 4; the tail pipes 6 at the end parts of the main heat exchange pipes 4 are communicated with the auxiliary heat exchange pipes 5, so that the tail gas temperature on any tail pipe 6 can be detected through the thermosensitive switch 30, and the tail pipes 6 and the cover plates 7 on the auxiliary heat exchange tail pipes are controlled to be switched, thereby effectively controlling the exhaust temperature of any main heat exchange pipe 4.
Specifically, the front and back sides of the cover plate 7 are provided with sealing rings so that the cover plate 7 can seal the main heat exchange tube 4 and the auxiliary heat exchange tube 5 when being closed independently.
Specifically, the one end and the apron 7 fixed connection of rotation piece 8, the other end of rotating piece 8 is equipped with U-shaped hole 81, the one end of magnetic path 10 is equipped with guide bar 101, guide bar 101 is located U-shaped hole 81, in order to be greater than U-shaped hole 81 of guide bar 101 diameter through length under the drive of magnetic path 10, it rotates to drive rotation piece 8, in order to realize rotating apron 7, in order to pass through the vertical elevating movement of magnetic path 10, it rotates to drive obtuse V-arrangement rotation piece 8.
Example 2:
as shown in fig. 4, in combination with the technical solution of embodiment 1, in this embodiment, the device for recycling heat from exhaust gas of the boiler 1 further includes a limiting rod 12, the limiting rod 12 is connected to the magnetic block 10, a spring 13 is sleeved on the limiting rod 12, one end of the spring 13 abuts against the upper side of the bracket 9, and the other end of the spring 13 abuts against the end of the limiting rod 12, so that the magnetic block 10 can return under the action of the spring 13 after being separated from the suction force of the electromagnet 11, so that the cover plate 7 rotates to close the secondary heat exchange tube 5, and the exhaust gas is discharged through the tail pipe 6; the limiting rod 12 is arranged, so that the magnetic block 10 can be effectively limited, and the quick return of the magnetic block 10 is improved through the spring 13.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or to modify equivalent embodiments with equivalent variations. Therefore, any modification, equivalent change and modification of the above embodiments according to the present invention are all within the protection scope of the present invention.
Claims (7)
1. A boiler tail gas heat recycling device comprises a preheating water tank (2) arranged on a boiler (1) and a main heat exchange tube (4) connected to a smoke exhaust main pipe (3), wherein the main heat exchange tube (4) is positioned in the preheating water tank (2); the heat exchanger is characterized by further comprising an auxiliary heat exchange tube (5), wherein the auxiliary heat exchange tube (5) is communicated with a tail exhaust tube (6) of the main heat exchange tube (4); a rotatable cover plate (7) is arranged at the communication position of the auxiliary heat exchange tube (5) and the tail exhaust tube (6), a rotating piece (8) is connected onto the cover plate (7), a support (9) is arranged at the top of the preheating water tank (2), and the rotating piece (8) is hinged to the support (9); a magnetic block (10) is arranged on the bracket (9), and one end of the rotating part (8) is movably sleeved with the end part of the magnetic block (10); an electromagnet (11) is arranged below the magnetic block (10), a thermosensitive switch (30) is arranged in the end part of the main heat exchange tube (4), and the thermosensitive switch (30) is connected to a loop circuit of the electromagnet (11); the heat exchanger further comprises a water inlet pipe (20), and the water inlet pipe (20) is sleeved on the auxiliary heat exchange pipe (5).
2. The boiler tail gas heat recycling device according to claim 1, characterized in that the secondary heat exchange tube (5) is arranged on the top of the preheating water tank (2) in a horizontal spiral structure, the water inlet tube (20) is sleeved on the secondary heat exchange tube (5) in a horizontal spiral structure, and the water inlet tube (20) is communicated with the preheating water tank (2).
3. The boiler tail gas heat recovery and utilization device according to claim 2, characterized in that the main heat exchange tubes (4) are of a spiral structure or an S-shaped structure.
4. The boiler tail gas heat recycling device according to claim 3, characterized in that the number of the main heat exchange tubes (4) is multiple, one end of each of the multiple main heat exchange tubes (4) is communicated with the smoke exhaust main pipe (3), and the tail pipes (6) at the ends of the multiple main heat exchange tubes (4) are communicated with the auxiliary heat exchange tubes (5).
5. The boiler tail gas heat recycling device according to claim 1, characterized in that the cover plate (7) is provided with sealing rings on the front and back surfaces.
6. The boiler tail gas heat recycling device according to any one of claims 1 to 5, characterized in that one end of the rotating piece (8) is fixedly connected with the cover plate (7), the other end of the rotating piece (8) is provided with a U-shaped hole (81), one end of the magnetic block (10) is provided with a guide rod (101), and the guide rod (101) is located in the U-shaped hole (81).
7. The boiler tail gas heat recycling device according to claim 6, further comprising a limiting rod (12), wherein the limiting rod (12) is connected to the magnetic block (10), a spring (13) is sleeved on the limiting rod (12), and one end of the spring (13) abuts against the upper side of the support (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020959027.4U CN211346430U (en) | 2020-05-29 | 2020-05-29 | Boiler tail gas heat recovery utilizes device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020959027.4U CN211346430U (en) | 2020-05-29 | 2020-05-29 | Boiler tail gas heat recovery utilizes device |
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| CN211346430U true CN211346430U (en) | 2020-08-25 |
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| CN202020959027.4U Active CN211346430U (en) | 2020-05-29 | 2020-05-29 | Boiler tail gas heat recovery utilizes device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114534432A (en) * | 2022-01-18 | 2022-05-27 | 浙江机电职业技术学院 | Tail gas treatment device for carbon/carbon composite material chemical vapor deposition |
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2020
- 2020-05-29 CN CN202020959027.4U patent/CN211346430U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114534432A (en) * | 2022-01-18 | 2022-05-27 | 浙江机电职业技术学院 | Tail gas treatment device for carbon/carbon composite material chemical vapor deposition |
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