CN217715009U - Water pipe exhaust-heat boiler of adjustable export flue gas temperature - Google Patents
Water pipe exhaust-heat boiler of adjustable export flue gas temperature Download PDFInfo
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- CN217715009U CN217715009U CN202221239155.7U CN202221239155U CN217715009U CN 217715009 U CN217715009 U CN 217715009U CN 202221239155 U CN202221239155 U CN 202221239155U CN 217715009 U CN217715009 U CN 217715009U
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Abstract
The utility model relates to a water pipe exhaust-heat boiler of adjustable export flue gas temperature belongs to boiler equipment's technical field. The device comprises a boiler barrel, wherein a shell is arranged below the boiler barrel, a flue gas inlet is formed in the bottom of one side of the shell, and a flue gas outlet is formed in the top of the shell; a plurality of evaporation heating surfaces are arranged in the shell, and a flue gas bypass communicated with the flue gas outlet is arranged at the central position of the evaporation heating surfaces; the inside of the flue gas bypass is provided with an adjusting valve for adjusting the flue gas volume of the bypass; and a temperature sensor is also arranged on the smoke outlet. The utility model discloses can adjust exhaust gas temperature and can realize online deashing, enable the long period operation of boiler.
Description
Technical Field
The utility model relates to a water pipe exhaust-heat boiler of adjustable export flue gas temperature belongs to boiler equipment's technical field.
Background
At present, in the industries of petrochemical industry, iron and steel and nonferrous metallurgy, energy, coal chemical industry and the like, after sulfide-containing waste liquid and waste gas are burnt, flue gas enters a waste (waste) heat boiler and needs to be cooled to a certain temperature, and then enters next-stage equipment. The exhaust gas temperature of the waste heat boiler must be at a certain temperature for the process requirements. The load variation range of the boiler is large, and a certain exhaust gas temperature is ensured, the currently adopted method is to adopt (1) a fire tube boiler form, a pipe with a larger diameter is arranged in the middle of a heat exchange pipe bundle to serve as a central pipe, a regulating valve is arranged at the rear part of the central pipe, and the mixed exhaust gas temperature is ensured by regulating the amount of the exhaust gas passing through the central pipe; (2) In the form of a water tube boiler, a rich heating surface is arranged, and when the temperature of flue gas is low, valves of part of the heating surface are turned off, namely, the heating surface is cut off; when the exhaust gas temperature is high, a valve is opened to enable the working medium to pass through the heating surface, but the 2 methods have problems:
the method (1) can block the heated pipe at the inlet of the heated surface quickly because the flue gas contains salt ash, the boiler is provided with an artificial ash cleaning port, the manual ash cleaning is carried out during the operation, the labor intensity is high, the working environment is severe, and the cleaning of the flue gas side of the pipe cannot be ensured, so that the furnace shutdown is caused;
according to the method (2), an automatic soot blower is arranged among tube groups, online automatic soot cleaning is realized through a PLC, and soot blowing is performed periodically to ensure the cleanness of a heated surface. The exhaust gas temperature is not controlled accurately and timely.
For example, chinese patent with patent publication No. CN210891594U discloses a positive pressure vertical water tube waste heat boiler, which comprises an empty smoke chamber housing, a first vertical flue chamber housing and a boiler drum, wherein a cylindrical water wall empty smoke chamber is arranged in the empty smoke chamber housing, a first heat exchange chamber is arranged in the first vertical flue chamber housing, the empty smoke chamber is connected with the first heat exchange chamber through a first smoke guide tube, a first main tube, a first heat exchange tube bank, a second main tube and a second heat exchange tube bank are arranged in the first heat exchange chamber, two ends of the first heat exchange tube bank are connected with the first main tube, two ends of the second heat exchange tube bank are connected with the second main tube, upper ends of the first main tube and the second main tube are both connected with the boiler drum, and lower ends of the first main tube and the second main tube are both connected with the boiler drum; the application has higher operation safety and stability, fewer faults, long service life, convenient operation and maintenance, good dust removal effect, reduction of dust accumulation on the evaporation heating surface and prevention of low-temperature acid corrosion on the evaporation heating surface, thereby improving the thermal efficiency of the boiler. Also for example, chinese patent publication No. CN105042553A discloses an intelligent auxiliary circulating water pipe waste heat boiler, which comprises a boiler chimney, a circulating water pump, an economizer, an evaporator, a superheater and an intelligent control device; the circulating water pump is connected with a water tank in the boiler chimney through a pipeline; the economizer is arranged on one side of the boiler; the evaporator is arranged between the economizer and the superheater; the intelligent control device is arranged on one side of the boiler; according to the application, an intelligent auxiliary circulating water pipe waste heat boiler is used, a steam-water mixture leaves an evaporator and enters an upper drum to be separated through steam-water separation equipment, water falls into a water space in the drum to enter a downcomer to continuously absorb heat to generate steam, steam enters a superheater from the upper part of the drum to absorb heat to change saturated steam into superheated steam, and three heating surfaces, namely an economizer, an evaporator and a superheater, correspond to three stages in a steam generation process.
However, the above-mentioned patent does not allow to vary the conditioning outlet flue gas temperature and does not guarantee the cleanliness of the heated surfaces.
Therefore, in order to solve the above background problems, it is urgent to develop a water pipe waste heat boiler capable of adjusting the temperature of the outlet flue gas.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem of proposing among the above-mentioned background problem, provide a water pipe exhaust-heat boiler of adjustable export gas temperature, the gas temperature that not only can adjust the export can also realize the deashing operation.
The purpose of the utility model is realized like this: a water pipe waste heat boiler capable of adjusting outlet flue gas temperature comprises a boiler barrel, wherein a shell is arranged below the boiler barrel, a flue gas inlet is formed in the bottom of one side of the shell, and a flue gas outlet is formed in the top of the shell; a plurality of evaporation heating surfaces are arranged in the shell, and a flue gas bypass communicated with the flue gas outlet is arranged at the central position of the evaporation heating surfaces; an adjusting valve for adjusting the amount of the bypass flue gas is arranged in the flue gas bypass; and a temperature sensor is also arranged on the smoke outlet.
Preferably, a soot blower is additionally arranged above each evaporation heating surface, the soot blower is arranged to perform soot cleaning operation so as to ensure the cleaning of the heating surface, and the soot blower is arranged to be a steam soot blower or a shock wave soot blower.
Preferably, the soot blower passes through wire and PLC electric connection, can control soot blower jack-up operation through PLC control system, need not manual operation, practices thrift the manpower greatly.
Preferably, the evaporation heating surface is of a serpentine structure.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses a water pipe exhaust-heat boiler of adjustable export flue gas temperature sets up temperature sensor at the outlet flue, adjusts the aperture of governing valve through the temperature that temperature sensor monitored to control the flue gas volume through the bypass, and then can control the flue gas temperature after bypass flue gas and the flue gas through the heating surface meet, make the boiler flue gas outlet temperature be a definite value when different loads;
the utility model discloses a water pipe exhaust-heat boiler of adjustable export gas temperature has set up the soot blower, and the soot blower passes through PLC control, can carry out the deashing operation, regularly blows the cleanness that the ash guarantees to receive the hot side, guarantees that the boiler long period moves.
Drawings
Fig. 1 is the utility model discloses an overall structure schematic diagram of a water pipe exhaust-heat boiler of adjustable export flue gas temperature.
Among them are: 1. a drum; 2. a flue gas outlet; 3. a flue gas bypass; 4. evaporating the heated surface; 5. a soot blower; 6. a temperature sensor; 7. adjusting a valve; 8. a flue gas inlet.
Detailed Description
The invention is described below with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, the water tube waste heat boiler capable of adjusting the temperature of outlet flue gas comprises a boiler barrel 1, wherein a shell is arranged below the boiler barrel 1, a flue gas inlet 8 is arranged at the bottom of one side of the shell, and a flue gas outlet 2 is arranged at the top of the shell;
a plurality of evaporation heating surfaces 4 are arranged in the shell, and a flue gas bypass 3 communicated with the flue gas outlet 2 is arranged at the central position of the evaporation heating surfaces 4;
an adjusting valve 7 for adjusting the bypass flue gas amount is arranged in the flue gas bypass 3;
and a temperature sensor 6 is also arranged on the smoke outlet 2.
In this embodiment, the evaporation heating surface 4 has a serpentine tube structure.
In the embodiment, a soot blower 5 is additionally arranged above each evaporation heating surface 4; exemplarily, the soot blower 5 is set as a steam soot blower or a shock wave soot blower, the soot blower 5 is electrically connected with a PLC through a lead, the soot blower 5 is controlled by the PLC to realize automatic soot cleaning operation, and regular soot blowing can ensure that a heated pipe is not blocked, thereby ensuring that the boiler runs for a long period.
In this embodiment, the utility model discloses a water pipe exhaust-heat boiler of adjustable export gas temperature, its theory of operation as follows:
a flue gas bypass 3 communicated with the flue gas outlet 2 is arranged at the central position of the plurality of evaporation heating surfaces 4, so that a part of flue gas passes through the flue gas bypass 3, the temperature of the flue gas in the flue gas bypass 3 is higher, and the flue gas passing through the plurality of evaporation heating surfaces 4 are mixed in front of the flue gas outlet 2 and then discharged out of the boiler, and the aim of adjusting the temperature of the flue gas at the outlet is fulfilled;
the temperature sensor 6 is arranged on the flue gas outlet 2 and can be used for monitoring the temperature of flue gas at the outlet and changing the opening of the regulating valve 7 according to the temperature of the flue gas at the outlet, so that the amount of the flue gas passing through the flue gas bypass 3 is changed, the aim of controlling the temperature of the flue gas at the outlet can be further achieved, the temperature of the flue gas outlet of the boiler is a constant value when the boiler is under different loads, and the requirements of the next procedure are met.
The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (5)
1. The utility model provides a water pipe exhaust-heat boiler of adjustable export flue gas temperature which characterized in that: the device comprises a boiler barrel (1), wherein a shell is arranged below the boiler barrel (1), a flue gas inlet (8) is formed in the bottom of one side of the shell, and a flue gas outlet (2) is formed in the top of the shell;
a plurality of evaporation heating surfaces (4) are arranged in the shell, and a flue gas bypass (3) communicated with the flue gas outlet (2) is arranged at the central position of the evaporation heating surfaces (4);
an adjusting valve (7) for adjusting the bypass flue gas amount is arranged in the flue gas bypass (3);
and a temperature sensor (6) is also arranged on the smoke outlet (2).
2. The water pipe waste heat boiler capable of adjusting the temperature of the outlet flue gas as claimed in claim 1, wherein: a soot blower (5) is additionally arranged above each evaporation heating surface (4).
3. The water pipe waste heat boiler capable of adjusting the temperature of the outlet flue gas as claimed in claim 2, wherein: the soot blower (5) is set as a steam soot blower or a shock wave soot blower.
4. The water pipe waste heat boiler capable of adjusting the temperature of the outlet flue gas as claimed in claim 3, characterized in that: the soot blower (5) is electrically connected with the PLC through a wire.
5. The water pipe waste heat boiler capable of adjusting the temperature of the outlet flue gas as claimed in claim 1, wherein: the evaporation heating surface (4) is of a coiled pipe structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221239155.7U CN217715009U (en) | 2022-05-23 | 2022-05-23 | Water pipe exhaust-heat boiler of adjustable export flue gas temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221239155.7U CN217715009U (en) | 2022-05-23 | 2022-05-23 | Water pipe exhaust-heat boiler of adjustable export flue gas temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217715009U true CN217715009U (en) | 2022-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221239155.7U Active CN217715009U (en) | 2022-05-23 | 2022-05-23 | Water pipe exhaust-heat boiler of adjustable export flue gas temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217715009U (en) |
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2022
- 2022-05-23 CN CN202221239155.7U patent/CN217715009U/en active Active
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