CN210892738U

CN210892738U - Lime kiln flue gas waste heat recovery device

Info

Publication number: CN210892738U
Application number: CN201920695153.0U
Authority: CN
Inventors: 许建新
Original assignee: Wuxi Zhongyue Petrochemical Equipment Co ltd
Current assignee: Wuxi Zhongyue Petrochemical Equipment Co ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-06-30
Anticipated expiration: 2029-05-16

Abstract

The utility model discloses a lime kiln flue gas waste heat recovery device, forge burning furnace including lime, the burning furnace outside is equipped with the trunk line for lime, the trunk line has concatenated sack cleaner, chimney in proper order, the trunk line is located and is equipped with the flue by-pass valve between burning furnace and the sack cleaner for lime, the trunk line is located and is equipped with the draught fan between sack cleaner and the chimney, flue by-pass valve both ends are connected with two bypass pipelines, be connected with exhaust-heat boiler on the bypass pipeline, exhaust-heat boiler's import links to each other with the burning furnace export for lime on the main pipeline through a bypass pipeline, exhaust-heat boiler export link to each other with the dust remover import through another bypass pipeline. The lime kiln flue gas waste heat recovery device can recover the waste heat of the lime calciner waste gas and optimize the flow of the waste heat recovery device.

Description

Lime kiln flue gas waste heat recovery device

Technical Field

The utility model belongs to the technical field of lime kiln flue gas waste heat recovery device, concretely relates to lime kiln flue gas waste heat recovery device.

Background

The calcining furnace is an important process equipment for producing lime at present. The exhaust gas temperature of the high-temperature flue gas generated by the calcining furnace in the combustion process after partial utilization still reaches 150-200 ℃, and the waste heat recovery is not generally carried out at present.

At present, because limekiln calcines there is the fluctuation, can cause that there is time flue gas temperature on the high side, causes the sack of the sack cleaner at rear portion to burn and decreases, flue gas draught fan inlet temperature and exceeds standard etc. to avoid the influence that from this brings to be: generally, only partial cold air is added to control the temperature of the bag dust collector. However, after cold air is added, the smoke volume is increased, but the air volume of the induced draft fan cannot be increased, so that the yield of the lime kiln is influenced, indexes cannot be finished, and the dust content of smoke discharged from a chimney can seriously exceed the standard.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lime kiln flue gas waste heat recovery device to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the lime kiln flue gas waste heat recovery device comprises a lime calcining furnace, wherein a main pipeline is arranged outside the lime calcining furnace, a bag-type dust remover and a chimney are sequentially connected in series with the main pipeline, a main flue bypass valve is arranged between the lime calcining furnace and the bag-type dust remover, an induced draft fan is arranged between the bag-type dust remover and the chimney on the main pipeline, two ends of the main flue bypass valve are connected with two bypass pipelines, a waste heat boiler is connected onto the bypass pipeline, an inlet of the waste heat boiler is connected with an outlet of the lime calcining furnace on the main pipeline through one bypass pipeline, and an outlet of the waste heat boiler is connected with an inlet of the dust remover.

Preferably, a heat transfer element is arranged inside the waste heat boiler, and the heat transfer element is a finned tube or a heat pipe or a combination of the finned tube and the heat pipe.

Preferably, one of the two bypass pipelines is provided with an outlet regulating valve and a temperature sensor, and the other bypass pipeline is provided with an inlet regulating valve and a temperature sensor.

Preferably, the two ends of the heat transfer element are respectively provided with a pipeline outlet and a pipeline inlet which are connected with a residential building.

Preferably, the waste heat boiler is vertically arranged.

Preferably, an ash removal opening is arranged below the waste heat boiler.

The utility model discloses a technological effect and advantage: the lime kiln flue gas waste heat recovery device can recover the waste heat of the waste gas of the petrochemical calcining furnace, reduce the operation cost, optimize the flow of the waste heat recovery device and ensure the stable operation of the subsequent production process; and hot water with certain temperature and flow can be generated to supply hot water for a subsequent process system or other users needing hot water, so that the comprehensive utilization of heat energy is facilitated, the requirements of energy conservation and emission reduction are met, and certain economic benefits and social benefits are achieved.

Drawings

FIG. 1 is a process flow diagram of the main structure of the present invention;

in the figure: 1. a lime calcining furnace; 2. an inlet regulating valve; 3. a main pipeline; 4. a heat transfer element; 5. a waste heat boiler; 6. an outlet regulating valve; 7. a bypass conduit; 8. a bag-type dust collector; 9. a chimney; 10. an induced draft fan; 11. a temperature sensor; 12. a conduit outlet; 13. a pipeline inlet; 14. the main flue regulating valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a lime kiln flue gas waste heat recovery device as shown in figure 1, calcine furnace 1 outside including lime and be equipped with trunk line 3, trunk line 3 has concatenated sack cleaner 8, chimney 9 in proper order, trunk line 3 is located and is equipped with main flue governing valve 14 between the calcine furnace 1 of lime and the sack cleaner 8, trunk line 3 is located and is equipped with draught fan 10 between sack cleaner 8 and the chimney 9, main flue governing valve 14 both ends are connected with two bypass pipeline 7, be connected with exhaust-heat boiler 5 on the bypass pipeline 7, exhaust-heat boiler 5's import links to each other through lime calcine furnace 1 export on 7 and the trunk line 3 of bypass pipeline 7, exhaust-heat boiler 5 export link to each other with 8 imports of dust remover through another bypass pipeline 7.

Specifically, the heat transfer element 4 is arranged inside the waste heat boiler 5, and the heat transfer element 4 is a finned tube, or a heat pipe, or a combination of the finned tube and the heat pipe, so that heat conversion and exchange are facilitated.

Specifically, one of the two bypass pipelines 7 is provided with an outlet regulating valve 6 and a temperature sensor 11, and the other bypass pipeline 7 is provided with an inlet regulating valve 2 and a temperature sensor 11.

Specifically, the two ends of the heat transfer element 4 are respectively provided with a pipeline outlet 12 and a pipeline inlet 13 which are connected with a residential building, so that conversion and transportation of heat and residential hot water are facilitated.

Specifically, the exhaust-heat boiler 5 is vertically arranged.

Specifically, an ash removal opening is arranged below the waste heat boiler 5.

The working principle is as follows: this lime kiln flue gas waste heat recovery device, when moving, the waste flue gas that lime calcining furnace 1 produced carries sack cleaner 8 through trunk line 3 and carries out the dust fall, rethread draught fan 10, chimney 9 carries in the atmosphere, at this in-process, low temperature hot water sends into and sends into the user for exhaust-heat boiler 5 preheats 120 ~ 160 ℃ after, be equipped with import governing valve 2 and export governing valve 6 and temperature sensor 11 on bypass pipeline 7, just so can realize the regulation to getting into 5 cold fluid temperatures of exhaust-heat boiler, in order to ensure that the minimum wall temperature of heat pipe exchanger is on flue gas dew point temperature, avoid producing the corruption to the equipment heat exchange tube.

Secondly, in order to prevent that exhaust-heat boiler troubleshooting from influencing the operation of whole calcining furnace system, the utility model discloses in still cut or put into operation waste heat recovery device through the switch of valve on the bypass line 7 that links to each other with exhaust-heat boiler 5, thereby close inlet valve 2, outlet valve 6 and realize waste heat recovery device's switching, maintenance when the heat pipe heat exchanger trouble promptly.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a lime kiln flue gas waste heat recovery device, includes lime calcining furnace (1), its characterized in that: the lime calcining furnace is characterized in that a main pipeline (3) is arranged outside the lime calcining furnace (1), a bag-type dust remover (8) and a chimney (9) are sequentially connected in series with the main pipeline (3), a main flue bypass valve (14) is arranged between the lime calcining furnace (1) and the bag-type dust remover (8) in the main pipeline (3), an induced draft fan (10) is arranged between the bag-type dust remover (8) and the chimney (9) in the main pipeline (3), two bypass pipelines (7) are connected to two ends of the main flue bypass valve (14), a waste heat boiler (5) is connected to the bypass pipeline (7), an inlet of the waste heat boiler (5) is connected with an outlet of the lime (1) in the main pipeline (3) through one bypass pipeline (7), and an outlet of the waste heat boiler (5) is connected with an inlet of the dust.

2. The lime kiln flue gas waste heat recovery device of claim 1, characterized in that: the waste heat boiler (5) is internally provided with a heat transfer element (4), and the heat transfer element (4) is a finned tube, or a heat tube, or a combination of the finned tube and the heat tube.

3. The lime kiln flue gas waste heat recovery device of claim 1, characterized in that: and one of the two bypass pipelines (7) is provided with an outlet regulating valve (6) and a temperature sensor (11), and the other bypass pipeline (7) is provided with an inlet regulating valve (2) and a temperature sensor (11).

4. The lime kiln flue gas waste heat recovery device of claim 2, characterized in that: and a pipeline outlet (12) and a pipeline inlet (13) which are connected with a residential building are respectively arranged at the two ends of the heat transfer element (4).

5. The lime kiln flue gas waste heat recovery device of claim 1, characterized in that: the waste heat boiler (5) is vertically arranged.

6. The lime kiln flue gas waste heat recovery device of claim 1, characterized in that: an ash removal opening is arranged below the waste heat boiler (5).