CN209991464U

CN209991464U - Primary air preheating device

Info

Publication number: CN209991464U
Application number: CN201920707861.1U
Authority: CN
Inventors: 赵立; 补世平; 蓝耀锋
Original assignee: Dongguan Kewei Environmental Protection Power Co Ltd
Current assignee: Dongguan Kewei Environmental Protection Power Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-01-24
Anticipated expiration: 2029-05-16

Abstract

The utility model relates to a primary air preheating device, it includes air heater and sets gradually the inlet tube around air heater, the air-supply line, the outlet pipe and goes out the tuber pipe, be provided with the heat exchange tube in the air heater, the both ends of heat exchange tube communicate with inlet tube and outlet pipe respectively, air-supply line and play tuber pipe symmetry set up the top and bottom side of heat exchange tube and communicate with air heater, the one end of air-supply line is equipped with gets wind gap and second fan, be provided with first fan on the play tuber pipe, and the export of going out the tuber pipe communicates with primary plenum, the entry and the high-pressure drain trap of inlet tube communicate, the end and the hydrophobic flash tank of outlet pipe communicate, be provided with the exhaust pipe on the hydrophobic flash tank, be provided with catch water on the exhaust pipe, catch water's steam outlet and trench; the air preheater system is guided to the low-pressure stage steam inlet by the high-pressure stage drain, so that the high-pressure stage and the low-pressure stage can be operated in series, and the steam-water separator is designed and installed at the steam exhaust pipe of the drain flash tank, thereby reducing the steam exhaust loss.

Description

Primary air preheating device

Technical Field

The utility model relates to a wind preheats the technique, concretely relates to wind air preheating device.

Background

In order to improve the combustion condition on the grate of the incinerator, the air preheater is adopted to heat primary air entering the grate so as to improve the air inlet temperature, and meanwhile, the smoke discharge problem of a boiler can be reduced, and the heat efficiency of the incinerator is improved. However, the heating system of the primary air-air preheater has the defects of large steam discharge amount of a drainage flash tank, serious water carrying, and waste of water resources caused by direct discharge.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be used for once wind air preheating device, air preheater system is drawn low pressure level admission department by high pressure level drainage, and high low pressure level can the series operation like this, and hydrophobic flash vessel steam extraction pipe department design has installed catch water, has reduced the steam extraction loss.

In order to realize the above purpose, the utility model discloses a technical scheme be: the primary air preheating device comprises an air preheater 15, and an inlet pipe 11, an air inlet pipe 13, an outlet pipe 16 and an air outlet pipe 5 which are sequentially arranged around the air preheater 15, wherein a heat exchange pipe 14 is arranged in the air preheater 15, two ends of the heat exchange pipe 14 are respectively communicated with the inlet pipe 11 and the outlet pipe 16, the air inlet pipe 13 and the air outlet pipe 5 are symmetrically arranged on the upper side and the lower side of the heat exchange pipe 14 and are communicated with the air preheater 15, one end of the air inlet pipe 13 is provided with an air intake port 10 and a second fan 12, the air outlet pipe 5 is provided with a first fan 4, an outlet of the air outlet pipe 5 is communicated with a primary air chamber 6, an inlet of the inlet pipe 11 is communicated with a high-pressure drain tank 9, the tail end of the water outlet pipe 16 is communicated with a drain flash tank 21, the drain tank 21 is provided with a steam exhaust pipe 17, the steam outlet of the steam-water separator 18 is communicated with a drainage ditch 19.

Further, the bottom of the drain flash tank 21 is connected with a drain pipe 22, the tail end of the drain pipe 22 is communicated with the low-pressure drain tank 3, and the bottom of the steam-water separator 18 is connected with a recovery pipe 20 communicated with the low-pressure drain tank 3.

Furthermore, a circulating water pipe 8 communicated with a high-pressure drain tank 9 is arranged on the low-pressure drain tank 3, and a circulating water pump 7 is arranged on the circulating water pipe 8.

Furthermore, one side of the low-pressure drain tank 3 is communicated with a water replenishing pipe 2, and a water replenishing pump 1 is arranged on the water replenishing pipe 2.

Furthermore, the outer sides of the water inlet pipe 11 and the air outlet pipe 5 are both coated with heat insulation layers.

The utility model has the advantages that: 1. the air preheater system is guided to the low-pressure stage steam inlet by the high-pressure stage drain, so that the high-pressure stage and the low-pressure stage can be operated in series, and the steam-water separator is designed and installed at the steam exhaust pipe of the drain flash tank, thereby reducing the steam exhaust loss.

2. And part of water can be recycled through the drain pipe and the recycling pipe, so that energy conservation and emission reduction are facilitated.

3. The water lost in the device can be supplemented in time through the water supplementing pump and the water supplementing pipe.

4. The water supply temperature and the air outlet temperature are ensured by coating the heat preservation layers outside the water inlet pipe and the air outlet pipe.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The text labels shown in the figures are represented as: 1. a water replenishing pump; 2. a water replenishing pipe; 3. a low-pressure drain tank; 4. a first fan; 5. an air outlet pipe; 6. a primary air chamber; 7. a water circulating pump; 8. a circulating water pipe; 9. a high-pressure drain tank; 10. an air inlet is formed; 11. a water inlet pipe; 12. a second fan; 13. an air inlet pipe; 14. a heat exchange pipe; 15. an air preheater; 16. a water outlet pipe; 17. a steam exhaust pipe; 18. a steam-water separator; 19. arranging a trench; 20. a recovery pipe; 21. a hydrophobic flash tank; 22. and a water discharge pipe.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

As shown in fig. 1, the structure of the present invention is: the primary air preheating device comprises an air preheater 15, and an inlet pipe 11, an air inlet pipe 13, an outlet pipe 16 and an air outlet pipe 5 which are sequentially arranged around the air preheater 15, wherein a heat exchange pipe 14 is arranged in the air preheater 15, two ends of the heat exchange pipe 14 are respectively communicated with the inlet pipe 11 and the outlet pipe 16, the air inlet pipe 13 and the air outlet pipe 5 are symmetrically arranged on the upper side and the lower side of the heat exchange pipe 14 and are communicated with the air preheater 15, one end of the air inlet pipe 13 is provided with an air intake port 10 and a second fan 12, the air outlet pipe 5 is provided with a first fan 4, an outlet of the air outlet pipe 5 is communicated with a primary air chamber 6, an inlet of the inlet pipe 11 is communicated with a high-pressure drain tank 9, the tail end of the water outlet pipe 16 is communicated with a drain flash tank 21, the drain tank 21 is provided with a steam exhaust pipe 17, the steam outlet of the steam-water separator 18 is communicated with a drainage ditch 19.

Preferably, the bottom of the drain flash tank 21 is connected with a drain pipe 22, the tail end of the drain pipe 22 is communicated with the low-pressure drain tank 3, and the bottom of the steam-water separator 18 is connected with a recovery pipe 20 communicated with the low-pressure drain tank 3.

Preferably, the low-pressure drain tank 3 is provided with a circulating water pipe 8 communicated with the high-pressure drain tank 9, and the circulating water pipe 8 is provided with a circulating water pump 7.

Preferably, one side of the low-pressure drain tank 3 is communicated with a water replenishing pipe 2, and a water replenishing pump 1 is arranged on the water replenishing pipe 2.

Preferably, the outer sides of the water inlet pipe 11 and the air outlet pipe 5 are both coated with heat insulation layers.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principle and the implementation of the present invention have been explained by using specific examples, the description of the above examples is only used to help understand the method and the core idea of the present invention, the above description is only the preferred implementation of the present invention, it should be pointed out that there is an infinite specific structure objectively due to the limited character expression, and for those skilled in the art, without departing from the principle of the present invention, several improvements, decorations or changes can be made, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims

1. Primary air preheating device, its characterized in that: it includes air heater (15) and sets gradually inlet tube (11), air-supply line (13), outlet pipe (16) and play tuber pipe (5) around air heater (15), be provided with heat exchange tube (14) in air heater (15), the both ends of heat exchange tube (14) communicate with inlet tube (11) and outlet pipe (16) respectively, air-supply line (13) and play tuber pipe (5) symmetry set up on the upper and lower side of heat exchange tube (14) and communicate with air heater (15), the one end of air-supply line (13) is equipped with gets wind gap (10) and second fan (12), be provided with first fan (4) on going out tuber pipe (5), and the export and the wind room (6) intercommunication of going out tuber pipe (5), the entry and the high pressure hydrophobic case (9) intercommunication of inlet tube (11), the end and hydrophobic flash tank (21) intercommunication of outlet pipe (16), the drain flash tank is characterized in that a steam exhaust pipe (17) is arranged on the drain flash tank (21), a steam-water separator (18) is arranged on the steam exhaust pipe (17), and a steam outlet of the steam-water separator (18) is communicated with a drainage ditch (19).

2. The primary air preheating device of claim 1, wherein: the bottom of the drainage flash tank (21) is connected with a drain pipe (22), the tail end of the drain pipe (22) is communicated with the low-pressure drain tank (3), and the bottom of the steam-water separator (18) is connected with a recovery pipe (20) communicated with the low-pressure drain tank (3).

3. The primary air preheating device of claim 2, wherein: the low-pressure drain tank (3) is provided with a circulating water pipe (8) communicated with the high-pressure drain tank (9), and the circulating water pipe (8) is provided with a circulating water pump (7).

4. The primary air preheating device of claim 3, wherein: one side of the low-pressure drain tank (3) is communicated with a water replenishing pipe (2), and a water replenishing pump (1) is arranged on the water replenishing pipe (2).

5. The primary air preheating device of claim 1, wherein: the outside of inlet tube (11) and air-out pipe (5) all is wrapped up with the heat preservation.