CN216592924U - Coal chemical industry flue gas waste heat recovery device - Google Patents

Abstract

The utility model belongs to the technical field of coal chemical industry, and relates to a flue gas waste heat recovery device in the coal chemical industry, which comprises a box body, a heat pipe exchanger, a bracket and a filtering unit, wherein the heat pipe exchanger is arranged on the box body; the heat pipe heat exchanger is arranged on the bracket; the filtering unit is arranged at the top of the box body; an air inlet pipe is arranged on the box body; the heat pipe heat exchanger is respectively provided with an exhaust pipe and a heat recovery unit which are communicated with the heat pipe heat exchanger; the air inlet pipe is communicated with the heat pipe exchanger through the filtering unit. The utility model has high heat recovery efficiency, can fully filter and absorb combustion products in the flue gas and prevent the filter screen from being blocked.

Description

Coal chemical industry flue gas waste heat recovery device

Technical Field

The utility model belongs to the technical field of coal chemical industry, and relates to a flue gas waste heat recovery device for the coal chemical industry.

Background

Coal chemical refers to the process of converting coal into gas, liquid and solid fuels and chemicals by chemical processing using coal as a raw material. The coal chemical industry mainly comprises coal gasification, liquefaction, dry distillation, tar processing, calcium carbide acetylene chemical industry and the like. Among the production technologies available in the coal industry, coking is the earliest process used and is an important component of the chemical industry. Coal is used as a resource which has huge reserves and can replace petroleum, and is more and more emphasized, the chemical structure of organic matters in the coal is a macromolecular structure which takes condensed rings mainly comprising aromatic as unit cores, is mutually connected by bridge bonds and has various functional groups, and the coal can be converted into various fuels and chemical products through thermal processing and catalytic processing.

In the hot working production process of coal chemical industry, can produce many attached have a large amount of thermal flue gases, still include some coal combustion products in the flue gas, such as grease, carbon oxide, nitrogen oxide, sulphide, dust, when carrying out flue gas treatment, it is very important to carry out heat recovery in the flue gas, to the enterprise, carry out heat recovery and can accomplish energy saving and emission reduction, the high-efficient resource that utilizes, realize economic benefits, industrial production carries out heat recovery and also makes sense to the environmental protection, so coal chemical industry production enterprise generally can carry out waste heat recovery to the flue gas and handle.

The mode that filters and heat recovery combined together is mostly adopted to current coal industry flue gas waste heat recovery device, but filter equipment is too simple, can not effectually filter the material in the flue gas, and grease viscidity in the flue gas is great, even glues easily on filter equipment, causes the jam to the filter screen, brings inconvenience for flue gas waste heat recovery, and, current heat recovery device efficiency is lower, has wasted a large amount of heat sources, causes the waste of the energy.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems of the existing coal chemical industry flue gas waste heat recovery, the utility model provides the coal chemical industry flue gas waste heat recovery device which has high heat recovery efficiency, can fully filter and absorb combustion products in flue gas and prevent a filter screen from being blocked.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a coal chemical industry flue gas waste heat recovery device comprises a box body, a heat pipe heat exchanger, a support and a filtering unit; the heat pipe heat exchanger is arranged on the bracket; the filtering unit is arranged at the top of the box body; the box body is provided with an air inlet pipe; the heat pipe heat exchanger is respectively provided with an exhaust pipe and a heat recovery unit which are communicated with the heat pipe heat exchanger; the air inlet pipe is communicated with the heat pipe exchanger through the filtering unit.

Further, the filtering unit comprises a first air duct and a first fan; the first air duct is arranged at the top of the box body; a primary filter screen is arranged in the first air duct in the radial direction; the air inlet pipe is communicated with the heat pipe exchanger through a first air duct and a first fan in sequence.

Furthermore, the filtering unit also comprises a motor, a rotating shaft and a scraper; the rotating shaft is sleeved outside the first air duct; the scraper is arranged in the first gas guide pipe and is positioned below the primary filter screen; the scraper plate is contacted with the surface of the primary filter screen; the scraper is connected with the rotating shaft; the motor is connected with the rotating shaft through a connecting piece.

Further, the connecting piece comprises a gear and a gear ring meshed with the gear; the gear is arranged on the output shaft of the motor; the gear ring is arranged on the outer wall of the rotating shaft.

Furthermore, the filtering unit also comprises a drawer arranged on the box body; the drawer is positioned right below the first air duct; the drawer is provided with a handle.

Further, the heat pipe heat exchanger comprises a shell, and an evaporation end and a condensation end which are arranged in the shell; the evaporation end is communicated with the condensation end; the evaporation end is respectively communicated with the first fan and the exhaust pipe; the condensing end is communicated with the heat recovery unit.

Further, the heat recovery unit is a third air duct or a water pipe.

Further, when the heat recovery unit is a third air duct, the coal chemical industry flue gas waste heat recovery device further comprises a second fan arranged on the bracket; and the second fan is connected with one end of the third air duct.

Further, a third-stage filter screen is arranged in the radial direction in the exhaust pipe.

Further, the coal chemical industry flue gas waste heat recovery device also comprises a second gas guide pipe arranged between the first fan and the condensation end; and a secondary filter screen is arranged in the second air duct in the radial direction.

The utility model has the beneficial effects that:

1. according to the utility model, the waste heat of the coal chemical industry flue gas is recovered through the heat pipe heat exchanger, the heat can be continuously conducted, the heat recovery device is safe and reliable, can continuously operate for a long time, and has high heat recovery efficiency; meanwhile, impurities in the flue gas are fully filtered through the filtering unit, so that the aims of reducing pollutant emission and realizing environmental friendliness are fulfilled.

2. According to the filtering device provided by the utility model, the primary filter screen is arranged to filter grease and large-particle smoke dust in the smoke, and the primary filter screen is cleaned in time through the scraper plate, so that the grease and large-particle smoke dust in the smoke are prevented from blocking the primary filter screen, and the smooth operation of the recovery process is ensured.

3. According to the filtering device provided by the utility model, the smoke passes through the primary filter screen, the secondary filter screen and the tertiary filter screen in sequence for filtering for three times, so that grease, large-particle smoke dust, grease moisture in the smoke, pungent odor gas and harmful gas can be effectively filtered, the purification of the smoke is finally realized, the smoke can be directly discharged or used for other production, and the filtering device is energy-saving and environment-friendly.

4. According to the utility model, the heat recovery unit is arranged to recycle the recovered heat; specifically, accessible third air duct or water pipe, the heat direct action that will retrieve is in air or aquatic, forms steam and hot water and carries out the thermal recycle of heat realization flue gas, and effective recycle heat source avoids the waste of the energy.

Drawings

Fig. 1 is a front view of a coal chemical industry flue gas waste heat recovery device provided in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the internal structure of FIG. 1 provided by the present invention;

FIG. 3 is an enlarged view of the portion A of FIG. 2 according to the present invention;

FIG. 4 is a bottom view of the part A structure of FIG. 2 in accordance with the present invention;

FIG. 5 is a schematic structural diagram of a heat pipe heat exchanger provided by the present invention;

fig. 6 is a front view of a coal chemical industry flue gas waste heat recovery device provided in embodiment 2 of the present invention;

wherein:

1. a box body; 2. a box body; 3. a drawer; 4. a handle; 5. an air inlet pipe; 6. a first fan; 7. a second air duct; 8. an exhaust pipe; 9. a heat pipe heat exchanger; 901. an evaporation end; 902. a condensing end; 10. a second fan; 11. a support; 12. a third air duct; 13. a second-stage filter screen; 14. a third-stage filter screen; 15. a first air duct; 16. a support frame; 17. a motor; 18. a gear; 19. a rotating shaft; 20. a ring gear; 21. a first-stage filter screen; 22. a squeegee; 23. a water pipe.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings and examples.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1 to 5, the coal chemical industry flue gas waste heat recovery device provided in this embodiment includes a box 1, a heat pipe exchanger 9, a support 11, and a filtering unit.

The filter unit provided by the embodiment is arranged at the top of the box body 1; an air inlet pipe 5 is arranged on the box body 1; the heat pipe heat exchanger 9 is respectively provided with an exhaust pipe 8 and a heat recovery unit which are communicated with the heat pipe heat exchanger 9; the air inlet pipe 5 is communicated with the heat pipe exchanger 9 through a filtering unit. The filtering unit comprises a first air duct 15 and a first fan 6; the first air duct 15 is arranged at the top of the box body 1; a primary filter screen 21 is arranged in the first air duct 15 in the radial direction; the air inlet pipe 5 is communicated with the heat pipe exchanger 9 through a first air duct 15 and a first fan 6 in sequence. The filter unit also comprises a motor 17, a rotating shaft 19 and a scraper 22; the rotating shaft 19 is sleeved outside the first air duct 15; the scraper 22 is arranged in the first air duct 15 and is positioned below the primary filter screen 21; the scraper 22 is contacted with the surface of the primary filter screen 21; the scraper 22 is connected with the rotating shaft 19; the motor 17 is connected with the rotating shaft 19 through a connecting piece.

During implementation, the box body 1 is rectangular, the drawer 3 is installed on the box body, the first air duct 15 is arranged at the top of the box body 1, the air inlet pipe 5 is arranged on the side wall of the box body 1, the air inlet pipe 5 is located above the drawer 3, the first air duct 15 is located right above the drawer 3, and the handle 4 is arranged on the drawer 3, so that the drawer 3 can be conveniently pulled out of or pushed into the box body 1.

During the implementation, set up one-level filter screen 21 on the radial direction in first air duct 15, one-level filter screen 21 is located the inside cross section of first air duct 15 promptly, and when the flue gas flowed through from first air duct 15, it was convenient for carry out the one-level filtration to the flue gas, filters grease and large granule smoke and dust in the flue gas.

Further in order to guarantee that the device moves smoothly, the below of one-level filter screen 21 sets up scraper blade 22 in first air duct 15, and ancient board 22 contacts with one-level filter screen 21 surface, utilizes scraper blade 22 to clean adnexed grease and large granule impurity on the one-level filter screen 21, avoids one-level filter screen 21 to block up for the flue gas passes through one-level filter screen 21 smoothly, improves the treatment effeciency.

During the implementation, the other support frame 16 that still sets up of first air duct 15 on the box 1, place motor 17 on the support frame 16, set up gear 18 on the motor 17 output shaft, the outside cover of first air duct 15 has pivot 19, set up ring gear 20 on the outer wall of pivot 19, gear 18 meshes with ring gear 20 mutually, realize being connected of pivot 19 and motor 17 output shaft, pivot 19 links to each other with scraper blade 22, thereby drive scraper blade 22 and rotate, scrape adnexed grease and large granule impurity on the one-level filter screen 21, and fall into in the drawer 3 that sets up in the box 1.

During implementation, the first fan 6 is arranged above the first air duct 15, and the first air duct 15 is communicated with the second air duct 7 through the first fan 6. Set up second grade filter screen 13 on the radial direction in the second air duct 7, second grade filter screen 13 is located the inside cross section of second air duct 7 promptly, and when the flue gas flowed through from second air duct 7, be convenient for carry out the second grade to the flue gas and filter dust and smoke and dust in the absorption flue gas, also have better absorption to the grease moisture in the higher flue gas of temperature simultaneously and filter, and the detachable filter screen is preferred to second grade filter screen 13, is convenient for change, washs and overhauls.

The heat pipe exchanger 9 provided by the embodiment is arranged on the bracket 11; the heat pipe heat exchanger 9 comprises a shell, and an evaporation end 901 and a condensation end 902 which are arranged in the shell; the evaporation end 901 is communicated with the condensation end 902; the evaporation end 901 is respectively communicated with the first fan 6 and the exhaust pipe 8; the condenser end 902 is in communication with a heat recovery unit. Three-stage filter screens 14 are arranged on the cross section inside the exhaust pipe 8, and the three-stage filter screens 14 are preferably activated carbon filter screens, so that irritant odor gas, harmful gas and the like in the flue gas can be absorbed, and the purification treatment of the flue gas is realized.

The heat recovery unit provided in this embodiment is the third gas-guide tube 12. The second fan 10 is arranged on the bracket 11; the second fan 10 is connected with one end of the third air duct 12.

The coal chemical industry flue gas waste heat recovery device that this embodiment provided, the use is:

1) the method comprises the steps of introducing the coal chemical industry flue gas to be heat recovered into an air inlet pipe 5, introducing the flue gas into a box body 1 along the air inlet pipe 5, starting a motor 17 and a first fan 6, allowing the flue gas to enter a first air duct 15 from the box body 1 under the action of the first fan 6, allowing the flue gas to pass through a primary filter screen 21 to be filtered for the first time in the first air duct 15, adsorbing grease in the flue gas on the bottom surface of the primary filter screen 21, allowing larger-particle smoke dust in the flue gas to be attached to the grease, allowing a motor 17 on a support frame 16 to work to drive a gear 18 at a power output end to rotate, allowing the gear 18 to be meshed with a gear ring 20, allowing the gear ring 20 to rotate along with the gear 18, driving a rotating shaft 19 to rotate, allowing a scraper 22 connected with the rotating shaft 19 to rotate, allowing the scraper 22 to be in contact with the bottom surface of the primary filter screen 21, and scraping the grease and large-particle smoke dust attached to the bottom surface of the primary filter screen 21, the filtering continuity is ensured, the scraper 22 scrapes off the grease and the large-particle smoke dust, the grease and the large-particle smoke dust fall into the drawer 3 arranged in the box body 1, and the grease and the large-particle smoke dust are collected and then are subjected to centralized treatment; the smoke filtered by the primary filter screen 21 is continuously sent into the second air duct 7 by the first fan 6;

2) the smoke is secondarily filtered by a secondary filter screen 13 in the second air duct 7, dust and smoke in the smoke are well absorbed, and meanwhile, the smoke has better absorption capacity for grease, moisture and the like in the smoke with higher temperature, so that the smoke is prepared for being sent to the heat pipe heat exchanger 9 in the next step; the reason is that the heat pipe exchanger 9 has a large surface area, is inconvenient to clean, is generally made of metal materials, and if the flue gas contains more moisture and grease, the flue gas has a certain corrosion effect on the heat pipe exchanger 9 or the grease is attached to the flue gas, so that the heat transfer efficiency of the heat pipe exchanger is influenced;

3) the flue gas after the secondary filtration by the second air duct 7 enters the evaporation end 901 of the heat pipe heat exchanger 9, and because in the heat pipe heat exchanger 9, heat is transferred from the evaporation end 901 to the condensation end 902, the flue gas with heat removed enters the exhaust pipe 8 from the evaporation end 901, and is filtered for the third time by the third-stage filter screen 14, the flue gas can be purified, and the pungent odor gas, the harmful gas and the like in the flue gas can be absorbed, and then the flue gas is discharged or used for other production; the removed heat is discharged from the condensation end 902, at this time, the second fan 10 is turned on to pump air into the third air duct 12, and the air brings out the heat of the condensation end 902 and discharges the heat through the other end of the third air duct 12 for heating or other production, thereby realizing the recycling of the heat.

Example 2

Referring to fig. 6, unlike embodiment 1, the third air duct 12 is replaced with a water pipe 23, one end of the water pipe 23 is connected to a faucet, and the other end discharges hot water for manufacturing or other applications.

Because under the standard condition, the specific heat capacity of water is 4200 joules per kilogram of degrees centigrade, and the specific heat capacity of air is 1400 joules per kilogram of degrees centigrade, so when conveniently connecting the water pipe or unnecessarily carrying out hot gas recovery, it has more economic benefits and realizes more efficient heat recovery to select water to collect the heat, consequently through setting up water pipe 23, the heat of retrieving in the flue gas direct action is in aqueous, improves the temperature of water, realizes thermal recycle.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The coal chemical industry flue gas waste heat recovery device is characterized by comprising a box body (1), a heat pipe heat exchanger (9), a support (11) and a filtering unit; the heat pipe heat exchanger (9) is arranged on the bracket (11); the filtering unit is arranged at the top of the box body (1); an air inlet pipe (5) is arranged on the box body (1); an exhaust pipe (8) and a heat recovery unit which are communicated with the heat pipe heat exchanger (9) are respectively arranged on the heat pipe heat exchanger (9); the air inlet pipe (5) is communicated with the heat pipe exchanger (9) through a filtering unit.

2. The coal chemical industry flue gas waste heat recovery device according to claim 1, wherein the filtering unit comprises a first gas guide pipe (15) and a first fan (6); the first air duct (15) is arranged at the top of the box body (1); a primary filter screen (21) is arranged in the first air duct (15) in the radial direction; the air inlet pipe (5) is communicated with the heat pipe exchanger (9) through a first air duct (15) and a first fan (6) in sequence.

3. The coal chemical industry flue gas waste heat recovery device according to claim 2, wherein the filter unit further comprises a motor (17), a rotating shaft (19) and a scraper (22); the rotating shaft (19) is sleeved outside the first air duct (15); the scraper (22) is arranged in the first air duct (15) and is positioned below the primary filter screen (21); the scraper (22) is in contact with the surface of the primary filter screen (21); the scraper (22) is connected with the rotating shaft (19); the motor (17) is connected with the rotating shaft (19) through a connecting piece.

4. The coal chemical industry flue gas waste heat recovery device according to claim 3, wherein the connecting piece comprises a gear (18) and a gear ring (20) meshed with the gear (18); the gear (18) is arranged on an output shaft of the motor (17); the gear ring (20) is arranged on the outer wall of the rotating shaft (19).

5. The coal chemical industry flue gas waste heat recovery device according to claim 4, wherein the filter unit further comprises a drawer (3) arranged on the box body (1); the drawer (3) is positioned under the first air duct (15); the drawer (3) is provided with a handle (4).

6. The coal chemical industry flue gas waste heat recovery device according to any one of claims 2 to 5, wherein the heat pipe heat exchanger (9) comprises a shell, and an evaporation end (901) and a condensation end (902) which are arranged in the shell; the evaporation end (901) is communicated with the condensation end (902); the evaporation end (901) is respectively communicated with a first fan (6) and an exhaust pipe (8); the condensing end (902) is in communication with a heat recovery unit.

7. The coal chemical industry flue gas waste heat recovery device of claim 6, wherein the heat recovery unit is a third gas guide pipe (12) or a water pipe (23).

8. The coal chemical industry flue gas waste heat recovery device according to claim 7, wherein when the heat recovery unit is a third gas guide pipe (12), the coal chemical industry flue gas waste heat recovery device further comprises a second fan (10) arranged on the bracket (11); the second fan (10) is connected with one end of the third air duct (12).

9. The coal chemical industry flue gas waste heat recovery device according to claim 8, wherein a three-stage filter screen (14) is arranged in the exhaust pipe (8) in the radial direction.

10. The coal chemical industry flue gas waste heat recovery device according to claim 9, wherein the coal chemical industry flue gas waste heat recovery device further comprises a second gas guide pipe (7) arranged between the first fan (6) and the condensation end (902); and a secondary filter screen (13) is arranged in the second air duct (7) in the radial direction.

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