Furnace gas treatment and utilization device for light and heavy ash calcining furnace

Abstract

The utility model discloses a furnace gas treatment and utilization device for a light and heavy ash calcining furnace, which belongs to the technical field of furnace gas treatment equipment and comprises a dust removal tank, a water tank is fixedly connected to one side of the dust removal tank, a gas inlet pipe is inserted into one side of the water tank, one end of the gas inlet pipe extends into the water tank and is communicated with a spiral gas guide pipe, and the other end of the gas guide pipe is communicated with a gas outlet pipe. One end of the spiral air guide pipe penetrates into the dust removal tank, a dust filter screen is fixedly connected to the inner wall of the dust removal tank located above the spiral air guide pipe, an induced draft fan is arranged on one side of the dust removal tank located above the dust filter screen in a communicating mode, and one end of the induced draft fan is provided with an exhaust port in a communicating mode; and a pulse cleaning mechanism for cleaning the dust filter screen is arranged in the dust removal tank. By arranging the pulse cleaning mechanism, the two-way rotating mechanism and the cleaning brush, the functions of reverse pulse cleaning and scraping cleaning of the filter screen are achieved, the cleaning effect is good, and the filtering effect of dust removal of furnace gas is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of furnace gas treatment equipment, in particular to a utilization device for treating furnace gas of a heavy and light ash calcining furnace. Background Art

[0002] The process of producing heavy and light ash using natural soda includes a brine extraction section, a multi-stage brine preheating section, a brine concentration and crystallization section, a wet alkali filtration section, and a wet alkali calcination and furnace gas treatment section. Among them, furnace gas is generated by calcining wet alkali in a calcining furnace. The temperature of the furnace gas reaches 120°C, and its main components are CO2, H2O, and entrained alkali dust. If it is directly discharged without treatment, on the one hand, it will pollute the environment, and on the other hand, it will cause waste of products and heat energy.

[0003] In a Chinese patent, a utilization device for treating furnace gas of a heavy and light ash calcining furnace and a double-layer packing scrubber (patent number: CN117101317B), this patent includes: a dust collector, an absorption tower, a double-layer packing scrubber, a condenser, an air cooler, and a draft fan; the double-layer packing scrubber includes a housing, and the housing is respectively provided with an upper section gas outlet, an upper section liquid inlet, an upper section gas inlet, an upper section liquid outlet, a lower section gas outlet, a lower section liquid inlet, a lower section gas inlet, and a lower section liquid outlet from top to bottom; while protecting the equipment, this patent makes full and reasonable use of the heat of the furnace gas, which can reduce energy consumption for the entire soda-making process system; all of the CO2, H2O, and entrained alkali dust in the furnace gas are recycled to achieve zero emissions. However, when the existing dust collector is in use, the cleaning operation of its dust filter screen has always been a rather difficult problem. Secondly, in this device, the furnace gas directly enters the dust collector for dust removal treatment, and then heat exchange and condensation operations are carried out. A large amount of heat in the furnace gas will be lost during the treatment process, affecting the utilization effect of the furnace gas heat. Summary of the Utility Model

[0004] Aiming at the above-mentioned existing technical deficiencies, the purpose of the utility model is to provide a utilization device for treating furnace gas of a heavy and light ash calcining furnace. By setting a pulse cleaning mechanism, a bidirectional rotation mechanism, and a cleaning brush, the reverse pulse cleaning and scraping cleaning operations of the filter screen are realized, with good cleaning effect, ensuring the function of dust removal and filtration effect on furnace gas; solving the problem that the cleaning operation of the dust filter screen of the existing dust collector in the background art has always been rather difficult.

[0005] To solve the above technical problems, the present utility model adopts the following technical solutions: The present utility model provides a device for treating and utilizing the furnace gas of a heavy and light ash calcination furnace, including: a dust removal tank, one side of the dust removal tank is fixedly connected with a water tank, one side of the water tank is inserted with an air inlet pipe, one end of the air inlet pipe extends into the water tank and is communicated with a spiral air guide pipe, one end of the spiral air guide pipe penetrates into the dust removal tank, the inner wall of the dust removal tank above the spiral air guide pipe is fixedly connected with a dust filter net, one side of the dust removal tank above the dust filter net is communicated with an induced draft fan, one end of the induced draft fan is communicated with an exhaust port, a pulse cleaning mechanism for cleaning the dust filter net is arranged in the dust removal tank, a bidirectional rotation mechanism is arranged in the dust removal tank, one end of the pulse cleaning mechanism is fixedly connected with one end of the bidirectional rotation mechanism, one end of the bidirectional rotation mechanism penetrates below the dust filter net and is fixedly connected with a cleaning brush that abuts against the lower side of the dust filter net, and the bottom of the dust removal tank is communicated with an ash discharge valve pipe.

[0006] Preferably, the pulse cleaning mechanism includes an air pump fixed on one side of the dust removal tank, one end of the air pump is communicated with a gas guide valve pipe, the upper side wall of the dust removal tank is communicated with a cover shell, one end of the gas guide valve pipe penetrates into the cover shell and is rotationally connected with a rotating inner pipe through a rotating sleeve, the outer side wall of the rotating inner pipe is rotationally connected with a rotating outer pipe through a bearing sleeve, the side wall of the rotating inner pipe is provided with an air vent communicated with the rotating outer pipe, both lower parts on both sides of the rotating outer pipe are communicated with air jet pipes, and the rotating inner pipe penetrates the dust filter net and is fixedly connected with the cleaning brush.

[0007] Preferably, the bidirectional rotation mechanism includes a driving motor fixed on one side of the cover shell, the main shaft end of the driving motor penetrates into the cover shell and is fixedly connected with a first bevel gear, the upper side of the rotating inner pipe is fixedly connected with a second bevel gear meshed with the first bevel gear, and the rotating outer pipe is fixedly connected with a third bevel gear meshed with the first bevel gear.

[0008] Preferably, one side of the rotating inner pipe below the dust filter net is fixedly connected with a mounting frame, and one side of the mounting frame is fixedly connected with a scraping plate that abuts against the inner wall of the dust removal tank.

[0009] Preferably, the lower end of the rotating inner pipe is fixedly connected with a spiral discharge rod.

[0010] Preferably, one side of the dust removal tank is fixedly connected with a control panel, and the control panel is electrically connected with one end of the induced draft fan, the pulse cleaning mechanism and the bidirectional rotation mechanism respectively.

[0011] Preferably, the upper side of the water tank is communicated with a water inlet valve port, and the bottom of the water tank is communicated with a water outlet valve port.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, by providing a pulse cleaning mechanism, a bidirectional rotation mechanism and a cleaning brush, when it is necessary to clean the dust filter net, the air pump is started to work, and the gas is introduced into the rotating outer tube through the air guide valve tube from the air vent, and then sprayed onto the filter net from the paint spraying tube for reverse pulse cleaning. At the same time, the driving motor is started to work, driving the first bevel gear to rotate. Since the first bevel gear meshes with the second bevel gear, the cleaning brush is driven to rotate, and the scraping and cleaning operation can be carried out on the filtering surface of the dust filter net. At the same time, since the first bevel gear meshes with the third bevel gear, the air spraying pipe can be driven to rotate, and the comprehensive pulse cleaning operation can be carried out on the dust filter net, with good cleaning effect and ensuring the dust removal and filtration effect of the furnace gas.

[0014] 2. In the present utility model, by providing a water tank and a spiral air guide pipe, when the furnace gas of the heavy and light ash calcining furnace is introduced into the spiral air guide pipe through the air inlet pipe, the spiral air guide pipe can exchange heat with the water in the water tank for heating, and the heated hot water can be used in the links that require hot water during the production of natural soda, improving the utilization effect of the heat of the furnace gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0017] Figure 2 It is a front cross-sectional structural schematic diagram of the present utility model.

[0018] Figure 3 In the present utility model Figure 2 The enlarged structural schematic diagram of part A.

[0019] Figure 4 In the present utility model Figure 2 The enlarged structural schematic diagram of part B.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the rotating inner tube and the rotating outer tube in the present utility model.

[0021] Description of reference numerals: 1 - dust removal tank, 2 - water tank, 3 - intake pipe, 4 - spiral air duct, 5 - dust filter screen, 6 - induced draft fan, 7 - exhaust port, 8 - cleaning brush, 9 - air pump, 10 - air guide valve pipe, 11 - housing, 12 - rotating inner pipe, 13 - rotating outer pipe, 14 - vent, 15 - jet pipe, 16 - drive motor, 17 - first bevel gear, 18 - second bevel gear, 19 - third bevel gear, 20 - mounting bracket, 21 - scraper, 22 - spiral discharge rod, 23 - control panel; 24, ash discharge valve pipe. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1:

[0024] As Figure 1 、 Figure 2 and Figure 3 shown, this embodiment provides a device for treating and utilizing the furnace gas of a heavy and light ash calcination furnace, including: a dust removal tank 1, a water tank 2 is fixedly connected to one side of the dust removal tank 1, an intake pipe 3 is inserted into one side of the water tank 2, one end of the intake pipe 3 extends into the water tank 2 and is connected with a spiral air duct 4 in communication, one end of the spiral air duct 4 penetrates into the dust removal tank 1, a dust filter screen 5 is fixedly connected to the inner wall of the dust removal tank 1 above the spiral air duct 4, an induced draft fan 6 is communicated with one side of the dust removal tank 1 above the dust filter screen 5, an exhaust port 7 is communicated with one end of the induced draft fan 6, a pulse cleaning mechanism for cleaning the dust filter screen 5 is arranged in the dust removal tank 1, a two-way rotation mechanism is arranged in the dust removal tank 1, the pulse cleaning mechanism is fixedly connected to one end of the two-way rotation mechanism, one end of the two-way rotation mechanism penetrates below the dust filter screen 5 and is fixedly connected with a cleaning brush 8 that abuts against the lower side of the dust filter screen 5, a dust discharge valve pipe 24 is communicated with the bottom of the dust removal tank 1 to discharge the ash scale.

[0025] A control panel 23 is fixedly connected to one side of the dust removal tank 1. The control panel 23 is electrically connected to one end of the induced draft fan 6, the pulse cleaning mechanism and the two-way rotation mechanism respectively, referring to the air pump 9 and the drive motor 16, externally connected to a power supply, and the related circuit is prior art, which can be completely realized by those skilled in the art without further elaboration.

[0026] An inlet valve port is communicated with the upper side of the water tank 2, and an outlet valve port is communicated with the bottom of the water tank 2, which is convenient for adding water and draining water.

[0027] Principle of this embodiment: When the furnace gas of the heavy and light ash calcining furnace is introduced into the spiral gas guide pipe 4 through the air inlet pipe 3, the spiral gas guide pipe 4 can exchange heat with the water in the water tank 2 for heating. The heated hot water can be used in the links that require hot water during the production of natural soda, improving the utilization effect of the heat of the furnace gas. The furnace gas is injected into the dust removal tank 1, and the dust in it can be filtered through the dust filter net 5. The induced draft fan 6 works to guide the furnace gas, so that the dedusted furnace gas is introduced into the next-stage treatment equipment through the exhaust port 7.

[0028] Embodiment 2:

[0029] As Figures 1 to 5 shown, on the basis of retaining all the technical features in Specific Embodiment 1, in this embodiment: The pulse cleaning mechanism includes an air pump 9 fixed on one side of the dust removal tank 1. One end of the air pump 9 is communicated with a gas guide valve pipe 10. The upper side wall of the dust removal tank 1 is communicated with a cover shell 11. One end of the gas guide valve pipe 10 penetrates into the cover shell 11 and is rotatably connected with a rotating inner pipe 12 through a rotating sleeve. The outer side wall of the rotating inner pipe 12 is rotatably connected with a rotating outer pipe 13 through a bearing sleeve. The side wall of the rotating inner pipe 12 is provided with a ventilation port 14 communicated with the rotating outer pipe 13. Both lower parts on both sides of the rotating outer pipe 13 are communicated with a jet pipe 15. The rotating inner pipe 12 penetrates through the dust filter net 5 and is fixedly connected with the cleaning brush 8.

[0030] The bidirectional rotation mechanism includes a driving motor 16 fixed on one side of the cover shell 11. The main shaft end of the driving motor 16 penetrates into the cover shell 11 and is fixedly connected with a first bevel gear 17. A second bevel gear 18 meshing with the first bevel gear 17 is fixedly connected to the upper side of the rotating inner pipe 12. A third bevel gear 19 meshing with the first bevel gear 17 is fixedly connected to the rotating outer pipe 13.

[0031] One side of the rotating inner pipe 12 located below the dust filter net 5 is fixedly connected with a mounting frame 20. One side of the mounting frame 20 is fixedly connected with a scraping plate 21 abutted against the inner wall of the dust removal tank 1. When the rotating inner pipe 12 rotates, it drives the scraping plate 21 to move in a circular motion along the inner wall of the dust removal tank 1, and the scale adsorbed on the inner wall of the dust removal tank 1 can be scraped off to achieve the cleaning effect.

[0032] The lower end of the rotating inner pipe 12 is fixedly connected with a spiral discharge rod 22. When the ash discharge valve pipe 24 is opened, the rotating spiral discharge rod 22 can discharge the furnace dust in the dust removal tank 1, which is convenient for scale removal.

[0033] Principle of this embodiment: When it is necessary to clean the dust filter net 5, start the air pump 9 to work. The gas is introduced into the rotating outer tube 13 through the air guide valve pipe 10 from the air vent 14, and then sprayed onto the dust filter net 5 from the spray pipe 15 for reverse pulse cleaning. At the same time, start the drive motor 16 to work, driving the first bevel gear 17 to rotate. Since the first bevel gear 17 meshes with the second bevel gear 18, the cleaning brush 8 is driven to rotate, and the scraping and cleaning operation can be performed on the filtering surface of the dust filter net 5. At the same time, since the first bevel gear 17 meshes with the third bevel gear 19, the spray pipe 15 can be driven to rotate, and a comprehensive pulse cleaning operation can be performed on the dust filter net 5.

[0034] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A light and heavy ash calcining furnace gas treatment and utilization device, characterized in that: include: A dust removal tank (1), one side of the dust removal tank (1) is fixedly connected to a water tank (2), one side of the water tank (2) is provided with an air intake pipe (3), one end of the air intake pipe (3) extends into the water tank (2) and is connected to a spiral air guide pipe (4), one end of the spiral air guide pipe (4) penetrates into the dust removal tank (1), a dust filter (5) is fixedly connected to the inner wall of the dust removal tank (1) above the spiral air guide pipe (4), and one side of the dust removal tank (1) above the dust filter (5) is connected to an induced draft fan (6), one end of the induced draft fan (6) is connected to an exhaust port (7), the dust removal tank (1) is provided with a pulse cleaning mechanism for cleaning the dust filter (5), the dust removal tank (1) is provided with a two-way rotating mechanism, the pulse cleaning mechanism is fixedly connected to one end of the two-way rotating mechanism, one end of the two-way rotating mechanism passes through the bottom of the dust filter (5) and is fixedly connected to a cleaning brush (8) that abuts against the lower side of the dust filter (5), and the bottom of the dust removal tank (1) is connected to an ash discharge valve pipe (24).

2. The light and heavy ash calcining furnace gas treatment and utilization device according to claim 1, characterized in that: The pulse cleaning mechanism comprises an air pump (9) fixed on one side of the dust removal tank (1); one end of the air pump (9) is connected to an air guide valve pipe (10); the upper side wall of the dust removal tank (1) is connected to a cover shell (11); one end of the air guide valve pipe (10) passes through the cover shell (11) and is rotatably connected to a rotating inner tube (12) through a rotating sleeve; the outer side wall of the rotating inner tube (12) is rotatably connected to a rotating outer tube (13) through a bearing sleeve; the side wall of the rotating inner tube (12) is provided with an air vent (14) connected to the rotating outer tube (13); the lower parts of both sides of the rotating outer tube (13) are connected to air injection pipes (15); the rotating inner tube (12) passes through the dust filter (5) and is fixedly connected to the cleaning brush (8).

3. The light and heavy ash calcining furnace gas processing and utilization device according to claim 2, characterized in that: The bidirectional rotation mechanism comprises a driving motor (16) fixed to one side of the housing (11); a main shaft end of the driving motor (16) penetrates into the housing (11) and is fixedly connected to a first bevel gear (17); a second bevel gear (18) meshingly connected to the first bevel gear (17) is fixedly connected to the upper side of the rotating inner tube (12); and a third bevel gear (19) meshingly connected to the first bevel gear (17) is fixedly connected to the rotating outer tube (13).

4. The light and heavy ash calcining furnace gas treatment and utilization device according to claim 2, characterized in that: A mounting frame (20) is fixedly connected to one side of the rotating inner tube (12) below the dust filter (5), and a scraper (21) abutting against the inner wall of the dust removal tank (1) is fixedly connected to one side of the mounting frame (20).

5. The light and heavy ash calcining furnace gas processing and utilization device according to claim 2, characterized in that: The lower end of the rotating inner tube (12) is fixedly connected with a spiral discharge rod (22).

6. The light and heavy ash calcining furnace gas processing and utilization device according to claim 1, characterized in that: A control panel (23) is fixedly connected to one side of the dust removal tank (1), and the control panel (23) is electrically connected to one end of the induced draft fan (6), the pulse cleaning mechanism, and the bidirectional rotating mechanism, respectively.

7. The light and heavy ash calcining furnace gas processing and utilization device according to claim 1, characterized in that: The upper side of the water tank (2) is connected to a water inlet valve port, and the bottom of the water tank (2) is connected to a water outlet valve port.

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