Flue gas emission and spray dust suppression device for low-temperature dust fall pipe

Abstract

The utility model relates to the technical field of industrial dust removal, in particular to a low-temperature dust fall pipe flue gas emission and spraying dust suppression device which comprises a dust fall pipe, an air door system used for controlling an opening in the top of the dust fall pipe to be opened and closed, a spraying system used for spraying into the dust fall pipe and a control system of the whole device. The dust falling pipe is installed on the top of the annular cooler cover, the air door system comprises a telescopic piece and an openable air door, and the telescopic piece is installed on the outer side of the dust falling pipe in a hinged mode and controls opening and closing of the openable air door through a connecting rod mechanism. The device has the dust suppression effect far better than that of products of the same type sold at present, a brand new design concept is adopted, a clean and energy-saving spraying system is ingeniously applied to a flue gas emission system, the energy-saving and environment-friendly design concept advocated by the country is met, and the device is particularly suitable for dust-free environment production scenes of modern and intelligent steel mills; an automatic control system is adopted, the whole production process is strictly controllable, spraying system parameters are set in a customized mode according to a flue gas emission system, and industry and national standards are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of industrial dust removal technology especially to a low-temperature dust fall pipe flue gas emission and spray dust suppression device. BACKGROUND

[0002] The ring cooler is a ring type cooler for short, and its function is to effectively cool hot sintered ore unloaded from a sintering machine. Compared with a belt cooler, the ring cooler has advantages of less land occupation, less investment, and high equipment utilization rate. In the working process of the ring cooler, it is necessary to ensure that the cooling fan continuously blows air through the material layer to complete efficient cooling of the material, and whether the cooling of the sintered ore meets the standard directly affects the product quality and production efficiency of a steel plant; and it is also necessary to ensure the quality of high-temperature flue gas after cooling to provide high-quality high-temperature flue gas for the enterprise to utilize waste heat and increase operating benefits.

[0003] The existing ring cooler is divided into four cooling zones, of which the first zone and the second zone are high-temperature zones, and the third zone and the fourth zone are medium-low-temperature zones. The high-temperature flue gas in the first zone and the second zone can be utilized by waste heat, but the medium-low-temperature flue gas in the third zone and the fourth zone cannot be utilized. The smoke dust waste gas will enter the ring cooler smoke hood and be discharged into the atmosphere, polluting the environment. If an electric bag composite dust removal method is used, there will be problems of unsatisfactory dust fall effect, high equipment cost, and difficult maintenance. CONTENT OF THE UTILITY MODEL

[0004] In order to effectively solve the problem of environmental pollution caused by waste gas emission and at the same time meet the design concept of economy, environmental protection, and energy saving, the utility model provides a low-temperature dust fall pipe flue gas emission and spray dust suppression device.

[0005] The low-temperature dust fall pipe flue gas emission and spray dust suppression device provided by the utility model adopts the following technical scheme:

[0006] The low-temperature dust fall pipe flue gas emission and spray dust suppression device comprises a dust fall pipe, a damper system for controlling the opening and closing of the top opening of the dust fall pipe, a spray system for spraying into the dust fall pipe, and a control system of the whole device. The dust fall pipe is installed on the top of the ring cooler cover. The damper system comprises a telescopic piece and an openable and closable damper. The telescopic piece is hingedly installed on the outside of the dust fall pipe, and the telescopic piece controls the opening and closing of the openable and closable damper through a connecting rod mechanism.

[0007] By adopting the above technical scheme, after the water mist contacts the dust in the high-temperature waste gas, the dust is adsorbed on the surface of the water mist particles due to the surface tension of the water mist particles. With the continuous increase and aggregation of the water mist particles, the gas will evaporate in the high-temperature environment, and the dust will gradually settle down and adhere to the surface of the material, thereby achieving the purpose of dust suppression.

[0008] The device adopts a new design concept, and the cleaning, non-toxic and energy-saving spray system is ingeniously applied to the flue gas emission system, which meets the energy-saving and environment-friendly design concept advocated by the state, and is especially suitable for modern and intelligent steel plant dust-free environment production scene; The whole device adopts an automatic control system, and the production whole process is strictly controllable. The staff remotely controls the system operation to ensure the safety operation of the staff; The spray system parameters are customized according to the flue gas emission system, which meets the industry and national standards, and the device has dust suppression effect far exceeding that of the same type of products on the market.

[0009] Optionally, the spray system comprises a water inlet pipe and a water distribution pipe, the water distribution pipe is arc-shaped and symmetrically provided with two, the two water distribution pipes are concentrically arranged, and a group of high-pressure nozzles are uniformly installed on each water distribution pipe.

[0010] By adopting the above technical scheme, the two groups of high-pressure nozzles surround the flue gas rising channel, the multiple high-pressure nozzles spray to form a dust suppression space, cover all directions of the flue gas rising, and have a high dust suppression effect.

[0011] Optionally, the two groups of high-pressure nozzles have different spray angles, and the water mist is in a double-layer three-dimensional cross shape.

[0012] By adopting the above technical scheme, the two groups of high-pressure nozzles spray water mist at different angles, forming a double-layer three-dimensional cross spray surface, the first layer suppresses dust on the whole flue gas, and the second layer supplements dust suppression on the flue gas. The three-dimensional cross dust suppression system is novel and practical, and the dust suppression quality is significantly improved.

[0013] Optionally, the spray system further comprises a water storage tank, the water inlet pipe is connected with the water storage tank, and a pressure motor or a water pump is installed on the water inlet pipe.

[0014] By adopting the above technical scheme, the water storage tank ensures water supply in an emergency state, so that the spray system cannot normally operate due to water stoppage.

[0015] Optionally, a static pressure liquid level meter is installed on the water storage tank.

[0016] By adopting the above technical scheme, the static pressure liquid level meter can automatically store water according to the water level height, so that the water in the water storage tank meets the continuous use demand of the spray system, and the overall automation degree of the device is significantly improved.

[0017] Optionally, the connecting rod mechanism comprises an L-shaped first connecting rod, a bearing seat installed on the outer side of the dust falling pipe, and an L-shaped second connecting rod installed on the bearing seat, one end of the first connecting rod is hingedly connected with the telescopic piece, the other end of the first connecting rod is perpendicularly fixedly connected with one end of the second connecting rod, and the other end of the second connecting rod is fixedly connected with the openable and closable air door.

[0018] By adopting the technical scheme, the telescopic member drives the first connecting rod to rotate the second connecting rod, and the second connecting rod drives the openable and closable damper to rotate, the connecting rod mechanism is simple to operate and has high practicability.

[0019] Optionally, the openable and closable dampers are two and semicircular, and the connecting rod mechanism and the telescopic member are provided with two groups.

[0020] By adopting the technical scheme, the two openable and closable dampers are used in cooperation, and the operability of controlling flue gas emission is improved.

[0021] Optionally, the control system comprises a distribution box and a controller.

[0022] By adopting the technical scheme, the telescopic member and other system elements can be controlled by the controller.

[0023] Optionally, the inside of the openable and closable damper and / or the inside of the dust fall pipe is coated with a high-temperature-resistant coating.

[0024] By adopting the technical scheme, the high-temperature-resistant coating can effectively prevent the openable and closable damper and / or the dust fall pipe from being corroded and deformed due to high temperature.

[0025] Optionally, the telescopic member is a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0026] By adopting the technical scheme, the telescopic member can be selected according to actual needs, and the hydraulic cylinder, the pneumatic cylinder or the electric push rod is a conventional telescopic member, which can be selected and used by workers.

[0027] In summary, the utility model has at least one of the following beneficial technical effects:

[0028] 1. After the water mist contacts the dust in the high-temperature waste gas, the dust is adsorbed on the surface of the water mist particles due to the surface tension of the water mist particles, with the continuous increase and aggregation of the water mist particles, the gas evaporates in the high-temperature environment, and the dust gradually settles down and adheres to the surface of the material, thereby achieving the purpose of dust suppression;

[0029] 2. The device adopts a new design concept, and the clean, non-toxic and energy-saving spray system is ingeniously applied to the flue gas emission system, which meets the energy-saving and environment-friendly design concept advocated by the country, and is especially suitable for modern and intelligent steel plant dust-free production environment;

[0030] 3. The whole device adopts an automatic control system, the whole production process is strictly controllable, the staff remotely controls the system operation, ensures the safe operation of the staff, the parameters of the spray system are customized according to the flue gas emission system, and meet the industry and national standards. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1It is the installation position schematic view of the low-temperature dust-settling pipe flue gas emission and spray dust suppression device of the embodiment of the utility model.

[0032] Figure 2 It is the front view of the low-temperature dust-settling pipe flue gas emission and spray dust suppression device closed state of the embodiment of the utility model.

[0033] Figure 3 It is the plan view of the low-temperature dust-settling pipe flue gas emission and spray dust suppression device closed state of the embodiment of the utility model.

[0034] Figure 4 It is the front view of the low-temperature dust-settling pipe flue gas emission and spray dust suppression device open state of the embodiment of the utility model.

[0035] Figure 5 It is Figure 4 the sectional view of A-A direction.

[0036] Figure 6 It is the front view of the spray system partial structure of the embodiment of the utility model.

[0037] Figure 7 It is the side view of the spray system partial structure of the embodiment of the utility model.

[0038] Mark explanation: 1, the ring cooling machine cover, 2, the dust-settling pipe, 20, the base, 21, the support, 3, the air door system, 30, the telescopic part, 300, the hinged support, 31, the connecting rod mechanism, 310, the first connecting rod, 311, the bearing seat, 312, the second connecting rod, 32, the openable and closable air door, 4, the spray system, 40, the water storage tank, 41, the static pressure type liquid level meter, 42, the water inlet pipe, 43, the pressure motor, 44, the water distribution pipe, 45, the high-pressure nozzle, 5, the control system, 50, the distribution box, 51, the controller. Specific implementation

[0039] The following combines with the attached Figure 1 - attached Figure 7 The utility model is further explained in detail.

[0040] The embodiment of the utility model discloses a kind of low-temperature dust-settling pipe flue gas emission and spray dust suppression device. Refer to Figure 1 And Figure 2 Low-temperature dust-settling pipe flue gas emission and spray dust suppression device are provided with three groups and are respectively installed on the ring cooling machine cover 1 of ring cooling machine third cooling zone and fourth cooling zone, and the flue gas temperature of third cooling zone is 90-150 DEG C, and the flue gas temperature of fourth cooling zone is 60-90 DEG C.The device includes dust-settling pipe 2 for guiding flue gas, air door system 3 for controlling pipeline opening and closing, spray system 4 for dust settling and control system 5 for operation.

[0041] Refer toFigure 2 and Figure 3 , the dust fall pipe 2 is installed on the top of the ring cooler cover 1 through the base 20, and a support 21 for fixing is installed on the dust fall pipe 2. The air door system 3 comprises a telescopic part 30, a connecting rod mechanism 31 and openable and closable air doors 32, the telescopic part 30 is installed on the support 21 through a hinge support 300, the connecting rod mechanism 31 comprises a first connecting rod 310, a bearing seat 311 and a second connecting rod 312.

[0042] With reference to Figure 3 , Figure 4 and Figure 5 , the telescopic part 30 in the embodiment is a hydraulic cylinder, and in other embodiments, a pneumatic cylinder or an electric push rod can also be selected, that is, as long as the use requirement is met, no limitation is made here. The first connecting rod 310 is L-shaped and one end thereof is hingedly connected to the end of the piston rod of the hydraulic cylinder, the bearing seat 311 is fixed on the support 21, the second connecting rod 312 is L-shaped and is installed on the bearing seat 311, one end of the second connecting rod 312 is perpendicularly fixedly connected to the other end of the first connecting rod 310, and the other end of the second connecting rod 312 is fixedly connected to the middle part of the openable and closable air door 32. The openable and closable air door 32 is in the shape of a semicircular plate, and two groups of openable and closable air doors 32 are used in cooperation to close the top opening of the dust fall pipe 2. The inner side of the openable and closable air door 32 and the inner side of the dust fall pipe 2 are coated with a high-temperature-resistant coating to prevent corrosion and deformation caused by high temperature.

[0043] With reference to Figure 4 and Figure 6 , the spray system 4 comprises a water storage tank 40 installed on the top of the ring cooler cover 1, which ensures the water supply in an emergency state. A static pressure type liquid level meter 41 is installed in the water storage tank 40, a water inlet pipe 42 for delivering water outward is installed on the water storage tank 40, and a pressurized motor 43 for pumping water is installed on the water inlet pipe 42. In other embodiments, a water pump can also be used as a power source for delivering water. The outlet end of the water inlet pipe 42 is connected with two water distribution pipes 44 through a three-way pipe fitting. The two water distribution pipes 44 are in the shape of semicircular arcs, are coaxially and symmetrically arranged, and a plurality of high-pressure nozzles 45 are uniformly installed on the water distribution pipes 44.

[0044] With reference to Figure 2 and Figure 7 , in order to better achieve the dust fall and dust suppression effect, the high-pressure nozzles 45 on both sides spray water mist at different angles to achieve a double-layer three-dimensional cross effect. The water mist is 500 mm and 800 mm away from the pipe opening height of the dust fall pipe 2, respectively. The control system 5 comprises a distribution box 50 installed on the support 21 and a controller 51 for providing control signals.

[0045] The implementation principle of the low-temperature dust-settling pipe flue gas emission and spray dust-suppression device is as follows: when the ring cooler is running, high-temperature flue gas passes through the base 20 from the top opening of the ring cooler cover 1 into the dust-settling pipe 2, the controller 51 controls the expansion piece 30 to start, the expansion piece 30 drives the first connecting rod 310 to rotate to drive the second connecting rod 312 to rotate, so as to open the two openable and closable air doors 32; the water tank 40 is filled with water, and the static pressure type liquid level meter 41 is arranged, when the water level reaches 600mm, the water storage is stopped, and when the water level is lower than 300mm, the water storage is started.

[0046] The water is extracted by the pressure motor 43 in sequence through the water inlet pipe 42 and the water distribution pipe 44, and finally atomized into fine water mist particles through the high-pressure nozzle 45, and sprayed at a certain angle and speed to the high-temperature waste gas, and after the water mist contacts the dust in the high-temperature waste gas, the dust is adsorbed on the surface of the water mist particles due to the surface tension of the water mist particles. With the continuous increase and aggregation of the water mist particles, the gas will evaporate in the high-temperature environment, and the dust will gradually settle down and adhere to the material surface, so as to achieve the purpose of dust suppression.

[0047] When the device needs to be closed, the operation controller 51 makes the expansion piece 30 close the openable and closable air door 32 through the connecting rod mechanism 31, closes the pressure motor 43, and simultaneously closes the valve to cut off the water source.

[0048] The whole device is designed with a height of about 3000mm, and the large particle dust falls back to the material surface due to its own gravity, and the small particle dust is adsorbed and pressed by the three-dimensional cross and superimposed water mist to achieve the effect of dust suppression and dust suppression. The device adopts a new design concept, and the clean, non-toxic and energy-saving spray system 4 is ingeniously applied to the flue gas emission system, which meets the energy-saving and environment-friendly design concept advocated by the country, and is especially suitable for modern and intelligent steel plant dust-free production environment; the whole device adopts an automatic control system 5, the whole production process is strictly controllable, the staff remotely controls the system operation, and the safety operation of the staff is ensured; the parameters of the spray system 4 are customized according to the flue gas emission system, which meets the industry and national standards, and the device has dust suppression effect far exceeding that of the same type of products on the market.

[0049] The above are preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: any equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.

Claims

1. A low-temperature dust-settling tube flue gas emission and spray dust suppression device, characterized in that: The device comprises a dust fall pipe (2), a damper system (3) for controlling the opening and closing of the top opening of the dust fall pipe (2), a spraying system (4) for spraying into the dust fall pipe (2), and a control system (5) of the whole device.

2. The low-temperature dust-settling tube flue gas emission and spray dust suppression device according to claim 1, characterized in that: The spraying system (4) comprises a water inlet pipe (42) and two symmetrical arc-shaped water distribution pipes (44), and a group of high-pressure nozzles (45) are uniformly arranged on each water distribution pipe (44).

3. The low-temperature dust-settling tube flue gas emission and spray dust suppression apparatus of claim 2, wherein: The two groups of high-pressure nozzles (45) have different spray angles, and the water mist is in a double-layer three-dimensional cross shape.

4. The low-temperature dust-settling tube flue gas emission and spray dust suppression apparatus of claim 2, wherein: The spraying system (4) further comprises a water storage tank (40), the water inlet pipe (42) is connected with the water storage tank (40), and a pressurizing motor (43) or a water pump is arranged on the water inlet pipe (42).

5. The low-temperature dust-settling tube flue gas emission and spray dust suppression apparatus of claim 4, wherein: A static pressure liquid level gauge (41) is arranged on the water storage tank (40).

6. The low-temperature dust-settling tube flue gas emission and spray dust suppression apparatus of any one of claims 1-5, wherein: The connecting rod mechanism (31) comprises an L-shaped first connecting rod (310), a bearing seat (311) arranged outside the dust fall pipe (2), and an L-shaped second connecting rod (312) arranged on the bearing seat (311), one end of the first connecting rod (310) is hinged with the telescopic part (30), the other end of the first connecting rod (310) is perpendicularly fixedly connected with one end of the second connecting rod (312), and the other end of the second connecting rod (312) is fixedly connected with the openable and closable damper (32).

7. The low-temperature dust-settling tube flue gas emission and spray dust suppression apparatus of claim 6, wherein: The openable and closable damper (32) is provided with two semicircular parts, and the connecting rod mechanism (31) and the telescopic part (30) are each provided with two groups.

8. The low-temperature dust-settling tube flue gas emission and spray dust suppression apparatus of claim 1, wherein: The control system (5) comprises a distribution box (50) and a controller (51).

9. The low-temperature dust-settling tube flue gas emission and spray dust suppression apparatus of claim 1, wherein: The inside of the openable and closable damper (32) and / or the inside of the dust fall pipe (2) is coated with a high-temperature-resistant coating.

10. The low-temperature dust-settling tube flue gas emission and spray dust suppression apparatus of claim 1, wherein: The telescopic part (30) is a hydraulic cylinder, an air cylinder or an electric push rod.

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