CN214486377U - Magnesium refining furnace desulfurization dust collector - Google Patents
Magnesium refining furnace desulfurization dust collector Download PDFInfo
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- CN214486377U CN214486377U CN202120286326.0U CN202120286326U CN214486377U CN 214486377 U CN214486377 U CN 214486377U CN 202120286326 U CN202120286326 U CN 202120286326U CN 214486377 U CN214486377 U CN 214486377U
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Abstract
The utility model belongs to the environmental protection equipment field specifically is a magnesium refining furnace desulfurization dust collector. The device includes: the device comprises a flue gas collecting device, a flue gas conveying device, a desulfurizing tower, a gas discharge pipeline and a bag-type dust remover. Wherein, the flue gas collection device is used for collecting the flue gas that the magnesium refining equipment operation in-process produced. The flue gas conveying device comprises a first induced draft fan and a conveying pipeline; the desulfurizing tower comprises a heat-insulating shell and at least one group of flue gas desulfurizing devices; the flue gas desulfurization device comprises a desulfurization chamber, a powder injection device, a blending device, a first valve, a second valve, a third valve and a fourth valve; the bag-type dust remover is positioned at the rear section of the desulfurizing tower, and a flue gas inlet of the bag-type dust remover is communicated with a third channel of the desulfurizing chamber; and a second induced draft fan for driving the flue gas to be transported is arranged between the two connecting pipelines. The device can solve the problems of low desulfurization treatment efficiency and easy blockage of the traditional equipment.
Description
Technical Field
The utility model belongs to the environmental protection equipment field specifically is a magnesium refining furnace desulfurization dust collector.
Background
The Pidgeon process is a conventional process for producing crude magnesium, wherein dolomite is used as a main raw material, the raw material is calcined in a rotary kiln to form calcined dolomite, and the main components of the calcined dolomite are calcium oxide and magnesium oxide. The method comprises the steps of taking ferrosilicon as a reducing agent and fluorite as a catalyst, metering and proportioning calcined dolomite, ferrosilicon and fluorite powder, grinding and pressing into pellets, loading the pellets into a transverse reduction tank, then loading a plurality of reduction tanks into the same reduction furnace, and heating the internal temperature of the reduction furnace to about 1250 ℃. Meanwhile, the interior of the reduction tank is vacuumized (the absolute pressure is less than 13.3Pa) and kept for 8-10 hours. Under the conditions, magnesium oxide in the pellets is reduced into metal magnesium, the magnesium enters a condensation crystallization barrel at the front end of a reduction tank in a steam mode at high temperature, crystalline magnesium, namely crude magnesium, is formed after cooling, a reduction tank cover is opened, the crystallization barrel is taken out, magnesium ingots are pressed out by a magnesium pressing machine after cooling, and the crude magnesium is obtained. The crude magnesium refining furnace adopts a gas heating crucible to melt crude magnesium for refining, and magnesium ingots with certain purity are obtained.
A large amount of smoke is generated in the processes of producing crude magnesium and refining magnesium ingots, and the sources of the smoke are mainly as follows:
1. in the refining process, a flux such as anhydrous magnesium chloride is required to be added at the bottom of the crucible, and the flux and other impurities can generate smoke dust at the upper part of the crucible in the refining process;
2. during the process of casting the magnesium liquid into magnesium ingots, sulfur powder is needed to extinguish fire of burning magnesium, and sulfur-containing smoke dust is generated;
3. the magnesium ingot tray is cast by adopting magnesium liquid, and smoke is generated during casting;
4. the residual magnesium slag after the magnesium liquid in the crucible is cast is tilted on a tilting machine and generates smoke dust when being cleaned.
5. The gas generates smoke dust after combustion.
The smoke generated in the production process causes pollution to the environment, so production enterprises generally need to collect and harmlessly treat the smoke. The traditional smoke dust collecting and processing mode is as follows: an acid gas washing tower is arranged, and 1, 2, 3 and 4 items of smoke dust are washed by alkaline solution and then discharged. However, the treatment method has some disadvantages that (1) in the production process, one part of sulfur powder participates in fire extinguishing and burns into sulfur dioxide gas, and the other part of unburned sulfur powder is pumped away with wind and enters a washing tower. Sulfur powder is accumulated on the spray head, the mist catcher and the internal bracket in the washing tower and forms sticky pasty solid with the washing liquid, thereby influencing the washing effect. The long-time accumulation forms large block-shaped solid, and when the spray head, the mist catcher and the internal bracket can not be supported, the solid falls into the bottom of the washing tower or crushes the spray head and the bracket. (2) A large amount of sulfur-containing wastewater is generated in the treatment process, and the treatment difficulty and the cost of the wastewater are relatively high. (3) The treatment and the discharge are not easy to reach the standard.
SUMMERY OF THE UTILITY MODEL
Problem to current technical scheme existence, the utility model aims to provide a magnesium refining furnace desulfurization dust collector, the device can solve the problem that traditional equipment desulfurization treatment effeciency is low and block up easily.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a magnesium refining furnace desulfurization dust collector, the device includes: the device comprises a flue gas collecting device, a flue gas conveying device, a desulfurizing tower, a gas discharge pipeline and a bag-type dust remover.
Wherein, the flue gas collection device is used for collecting the flue gas that the magnesium refining equipment operation in-process produced.
The flue gas conveying device comprises a first induced draft fan and a conveying pipeline; one end of the conveying pipeline is communicated with an outlet of the flue gas collecting device, and the other end of the conveying pipeline is communicated with a flue gas inlet of the desulfurizing tower; first draught fan is connected with pipeline, and first draught fan is arranged in the flue gas that drives in the pipeline and enters into the desulfurizing tower from flue gas collection device.
The desulfurizing tower comprises a heat-insulating shell and at least one group of flue gas desulfurizing devices; the flue gas desulfurization device comprises a desulfurization chamber, a powder injection device, a blending device, a first valve, a second valve, a third valve and a fourth valve; the desulfurization chamber is a volute-shaped container with a cavity, which is vertically arranged; the upper left, upper right, lower right and lower left positions in the outer wall of the desulfurization chamber along the circumferential direction are respectively provided with a channel tangent with the circumferential surface, and the four channels are all communicated with the cavity of the desulfurization chamber; the first channel positioned at the upper left position of the desulfurization chamber is a desulfurized clean gas outlet, and the first channel extends upwards; the second channel positioned at the upper right position of the desulfurization chamber is a baking soda powder inlet, and the second channel extends rightwards; a third channel positioned at the right lower position of the desulfurization chamber is a dust outlet and extends downwards; the fourth channel positioned at the lower left position of the desulfurization chamber is a flue gas inlet, and the fourth channel extends leftwards; the first valve is arranged at the interface of the first channel and the desulfurization chamber and used for controlling the on-off of the first channel; the second valve is arranged at the interface of the second channel and the desulfurization chamber and is used for controlling the on-off of the second channel; the third valve is arranged at the interface of the third channel and the desulfurization chamber and is used for controlling the on-off of the third channel; the fourth valve is arranged at the interface of the fourth channel and the desulfurization chamber and is used for controlling the on-off of the fourth channel; the powder injection device is positioned at the second channel, and the injection direction of the powder injection device is directed to the inside of the desulfurization chamber along the second channel; the powder injection device is communicated with a sodium bicarbonate feeding device outside the desulfurizing tower through a pipeline; the blending device comprises an impeller, a rotating shaft and a blending driving motor; the impeller is positioned at the center of the desulfurization chamber and is vertically connected with one end of the rotating shaft; the rotating shaft is arranged along the axial direction of the desulfurization chamber and is concentric with the circumferential section of the desulfurization chamber; the other end of the rotating shaft penetrates through the outer wall of the desulfurization chamber and is connected with an output shaft of the uniformly mixing driving motor through a shaft sleeve; the blending driving motor is positioned outside the cavity of the desulfurization chamber.
One end of the gas discharge pipeline is communicated with the first channel of the desulfurization chamber, and the other end of the gas discharge pipeline extends upwards to the outside of the desulfurization tower.
The bag-type dust remover is positioned at the rear section of the desulfurizing tower, and a flue gas inlet of the bag-type dust remover is communicated with a third channel of the desulfurizing chamber; a second induced draft fan for driving the flue gas to transfer is arranged between the connecting pipelines of the two; the bag-type dust collector is used for receiving the mixture of the dust and the gas discharged by the third channel and separating and recycling the dust.
Furthermore, the rotating shaft in the blending device is rotatably connected with the outer wall of the desulfurization chamber through a sealed bearing.
Furthermore, the number of the flue gas desulfurization devices in the desulfurization tower is multiple, and the multiple flue gas desulfurization devices are vertically distributed in the desulfurization tower; the next stage of flue gas desulfurization device is positioned below the last stage of flue gas desulfurization device; the first channel and the third channel of the upper-stage flue gas desulfurization device are communicated with each other through a retreatment pipeline, and the other end of the retreatment pipeline is communicated with the fourth channel of the next-stage flue gas desulfurization device; powder injection devices which are mutually independent are arranged in each stage of flue gas desulfurization device; the gas discharge pipeline is communicated with the first channel of the last stage of flue gas desulfurization device.
Furthermore, the reprocessing pipeline is a smooth transition bent pipe, and in the bent pipe, dust discharged by the flue gas desulfurization device at the previous stage slides to the flue gas desulfurization device at the next stage by virtue of gravity.
Furthermore, in the multi-stage flue gas desulfurization device, a sulfur dioxide sensor is arranged in the first channel of each stage of desulfurization chamber.
Furthermore, a heating device is arranged on the outer wall of the desulfurization chamber and used for heating the desulfurization chamber; an embedded temperature sensor is arranged on the inner wall of the desulfurization chamber and used for measuring the ambient temperature in the desulfurization chamber.
Furthermore, the heating device is an electric heating device, and heating electrodes of the electric heating device are uniformly distributed on the outer wall of the desulfurization chamber.
Furthermore, a plurality of ridge-shaped structures which are bulged outwards are uniformly arranged on the outer wall of the desulfurization chamber, and mounting grooves are formed in the ridge-shaped structures; the heating electrode of the electric heating device is fixed in the mounting groove.
Further, the flue gas desulfurization device also comprises a cleaning device, and the cleaning device comprises a rotary scraper and a spraying device; the rotary scraper comprises a connecting sleeve, a connecting rod and a scraping strip; the connecting sleeve is sleeved with the part of the rotating shaft in the desulfurization chamber in the blending device; the scraping bar is U-shaped and is attached to the inner wall of the desulfurization chamber; the length of a vertical rod of the scraping strip is equal to the length of the radius of the circular section of the inner cavity of the desulfurization chamber; the length of a cross rod of the scraping strip is equal to the thickness of the inner cavity of the desulfurization chamber along the axial direction; the connecting rod is used for connecting the connecting sleeve and the middle section of the rod body at the inner side of the cross rod of the scraping strip.
Furthermore, a spray head of the spray device is positioned right above the inner cavity of the desulfurization chamber and is embedded in the inner wall of the desulfurization chamber; the spray head is communicated with a water storage device outside the desulfurization chamber through a pipeline penetrating through the outer wall of the desulfurization chamber; and the power system of the spraying device is positioned outside the desulfurization chamber.
The utility model provides a pair of magnesium refining furnace desulfurization dust collector has following beneficial effect:
the desulfurization and dust removal device adopts baking soda powder to perform dry desulfurization and dust removal, wherein a desulfurization chamber in a desulfurization tower adopts a volute structure, inlets of the baking soda powder and smoke dust are respectively arranged at two opposite ends, and the smoke dust and the baking soda can form vortex after being sprayed into the desulfurization chamber; in addition, the mixing device in the desulfurization chamber can also assist in improving the mixing effect of the smoke dust and the baking soda through the rotation of the impeller; the desulfurization agent and the desulfurization agent can be fully and uniformly mixed, so that the speed and the incidence rate of desulfurization chemical reaction are improved, and the desulfurization effect of the smoke dust is finally improved.
In order to further improve desulfurization treatment effect, the utility model provides an in the desulfurizing tower still set up a plurality of flue gas desulfurization devices, carry out the multilevel processing to the smoke and dust, guarantee that the sulfur dioxide gas concentration in the final combustion gas falls to the safety standard that can discharge.
Simultaneously among this type flue gas desulfurization dust collecting equipment, can be under gaseous state with the gaseous harmless gaseous emission of gases such as vapor that produce in the desulfurization treatment, combine with the dust after avoiding the vapor liquefaction, cause pollution and jam to equipment and pipeline, reduce the maintenance frequency of equipment, improve the life of this equipment.
The utility model also has a scraper and a spray device in the desulfurizing tower, which can clean the desulfurizing tower regularly; and dust attached to the inside of the equipment is removed, so that the probability of blockage of the equipment in the running process is further reduced.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a schematic view showing the structure of a desulfurizing and dust-collecting apparatus of a magnesium refining furnace in example 1;
FIG. 2 is a schematic view showing the structure of a flue gas desulfurization unit in the desulfurization and dust-removing apparatus of the magnesium refining furnace in example 1;
FIG. 3 is a schematic view showing the structure of a flue gas desulfurization unit in the desulfurization and dust-removing apparatus of a magnesium refining furnace in example 2;
FIG. 4 is a schematic view showing the structure of the rotating blade and the impeller of the kneading device in the desulfurization and dust-removal apparatus of a magnesium refining furnace in example 2;
labeled as:
1. a flue gas collection device; 2. a flue gas conveying device; 3. a desulfurizing tower; 4. a bag-type dust collector; 10. magnesium refining equipment; 11. a first valve; 12. a second valve; 13. a third valve; 14. a fourth valve; 21. A first induced draft fan; 22. a delivery conduit; 31. a heat-insulating shell; 32. a flue gas desulfurization unit; 33. a gas discharge conduit; 41. a second induced draft fan; 320. a desulfurization chamber; 321. a first channel; 322. a second channel; 323. a third channel; 324. a fourth channel; 325. an impeller; 326. a powder injection device; 327. Heating the electrode; 328. a spray head; 329. a sulfur dioxide sensor; 330. a temperature sensor; 331. the squeegee is rotated.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
As shown in fig. 1, the present embodiment provides a magnesium refining furnace desulfurization dust removal device, which comprises: the device comprises a flue gas collecting device 1, a flue gas conveying device 2, a desulfurizing tower 3, a gas discharge pipeline 33 and a bag-type dust remover 4.
Wherein the flue gas collecting device 1 is used for collecting flue gas generated in the operation process of the magnesium refining equipment 10.
The flue gas conveying device 2 comprises a first induced draft fan 21 and a conveying pipeline 22; one end of the conveying pipeline 22 is communicated with the outlet of the flue gas collecting device 1, and the other end is communicated with the flue gas inlet of the desulfurizing tower 3; first draught fan 21 is connected with pipeline 22, and first draught fan 21 is arranged in the flue gas that drives in the pipeline 22 and enters into desulfurizing tower 3 from flue gas collection device 1.
The desulfurizing tower 3 comprises a heat-insulating shell 31 and at least one group of flue gas desulfurizing devices 32; as shown in fig. 2, the flue gas desulfurization device 32 includes a desulfurization chamber 320, a powder injection device 326, a blending device, a first valve 11, a second valve 12, a third valve 13, and a fourth valve 14; the desulfurization chamber 320 is a volute-shaped cavity-equipped container which is vertically arranged; the four positions of the upper left, the upper right, the lower right and the lower left in the outer wall of the desulfurization chamber 320 along the circumferential direction are respectively provided with a channel tangent with the circumferential surface, and the four channels are all communicated with the cavity of the desulfurization chamber 320; the first passage 321 at the upper left position of the desulfurization chamber 320 is a desulfurized clean gas outlet, and the first passage 321 extends upwards; the second passage 322 located at the upper right position of the desulfurization chamber 320 is a baking soda powder inlet, and the second passage 322 extends rightward; a third channel 323 positioned at the lower right position of the desulfurization chamber 320 is a dust outlet, and the third channel 323 extends downwards; the fourth channel 324 at the lower left position of the desulfurization chamber 320 is a flue gas inlet, and the fourth channel 324 extends to the left; the first valve 11 is arranged at the interface of the first channel 321 and the desulfurization chamber 320 and is used for controlling the on-off of the first channel 321; the second valve 12 is arranged at the interface of the second channel 322 and the desulfurization chamber 320 and controls the on-off of the second channel 322; the third valve 13 is arranged at the interface of the third channel 323 and the desulfurization chamber 320 and is used for controlling the on-off of the third channel 323; the fourth valve 14 is arranged at the interface of the fourth channel 324 and the desulfurization chamber 320 and is used for controlling the on-off of the fourth channel 324; the powder injection device 326 is positioned at the second passage 322, and the injection direction of the powder injection device 326 is directed to the inside of the desulfurization chamber 320 along the second passage 322; the powder injection device 326 is communicated with a baking soda feeding device outside the desulfurizing tower 3 through a pipeline; the blending device comprises an impeller 325, a rotating shaft and a blending driving motor; the impeller 325 is positioned at the center of the desulfurization chamber 320, and the impeller 325 is vertically connected with one end of the rotating shaft; the rotating shaft is arranged along the axial direction of the desulfurization chamber 320 and is arranged concentrically with the circumferential section of the desulfurization chamber 320; the other end of the rotating shaft penetrates through the outer wall of the desulfurization chamber 320 and is connected with an output shaft of the blending driving motor through a shaft sleeve; the blending driving motor is located outside the cavity of the desulfurization chamber 320.
One end of the gas discharge duct 33 communicates with the first passage 321 of the desulfurization chamber 320, and the other end extends upward to the outside of the desulfurization tower 3.
The bag-type dust collector 4 is positioned at the rear section of the desulfurizing tower 3, and a flue gas inlet of the bag-type dust collector 4 is communicated with a third channel 323 of the desulfurizing chamber 320; a second induced draft fan 41 for driving the flue gas to transfer is arranged between the connecting pipelines of the two; the bag-type dust collector 4 is used for receiving the dust and gas mixture discharged from the third channel 323 and separating and recycling the dust.
When this type flue gas desulfurization device 32 uses, the high-speed rotation of first draught fan 21 among the flue gas conveyor 2, can form negative pressure state in flue gas collection device 1 when first draught fan 21 rotates to inhale pipeline 22 with flue gas and the dust that magnesium refining equipment 10 operation in-process produced, and further carry in the desulfurizing tower 3.
The flue gas and dust, which are generated by the magnesium refining apparatus 10 and generally maintained at a high temperature, enter the desulfurization tower 3 along the fourth passage 324; the inside of the desulfurization chamber 320 in the desulfurization tower 3 is also heated to a higher temperature. While the soot is introduced into the desulfurization chamber 320, the first and third valves 11 and 13 open the first and third passages 321 and 323, and the second and fourth valves 12 and 14 keep the second and fourth passages 322 and 324 closed; the powder injection device 326 injects baking soda powder into the desulfurization chamber 320 along the second passage 322. The sodium bicarbonate is subjected to decomposition reaction at high temperature in the desulfurization chamber 320 to generate water vapor and sodium carbonate, and the sodium carbonate is combined with sulfur dioxide gas to generate oxidation-reduction reaction to produce sulfate; the effect of the sulfur dioxide in the desorption gas is reached, and simultaneously, the mixing device can be further opened by the operator, the gas circulation in the desulfurization chamber 320 is accelerated through the rotation of the impeller 325, and the desulfurization reaction rate is further improved. Wherein, when the smoke dust and baking soda powder in the desulfurization chamber 320 reach the specified capacity; the operator can close the second channel 322 and the fourth channel 324, and keep the blending device rotating to completely react the sulfur dioxide gas in the desulfurization chamber 320.
When the sulfur dioxide gas is completely removed, an operator opens the first valve 11 and the third valve 13; so that the first and third passages 321 and 323 are conducted and keep the impeller 325 rotated. At this time, the water vapor in the desulfurization chamber 320 escapes along the first passage 321 and the gas discharge pipe 33 due to its low density; and the other gas components and dust fall down along the third passage 323 by the impeller 325. And enters the bag-type dust collector 4 under the driving of a second induced draft fan 41 to complete the separation of dust and gas and collect the dust.
Wherein, the rotating shaft in the blending device is rotatably connected with the outer wall of the desulfurization chamber 320 through a sealed bearing.
In the utility model, the number of the flue gas desulfurization devices 32 in the desulfurizing tower 3 is multiple, and the plurality of flue gas desulfurization devices 32 are vertically distributed in the desulfurizing tower 3; the flue gas desulfurization device 32 of the next stage is positioned below the flue gas desulfurization device 32 of the previous stage; the first passage 321 and the third passage 323 of the upper stage flue gas desulfurization device 32 are communicated with each other through the retreatment pipeline 34, and the other end of the retreatment pipeline 34 is communicated with the fourth passage 324 of the next stage flue gas desulfurization device 32; the powder injection devices 326 which are mutually independent are arranged in each stage of the flue gas desulfurization device 32; the gas discharge duct 33 communicates with the first passage 321 of the flue gas desulfurization device 32 of the final stage.
Reprocessing line 34 is a smooth transition elbow. In the elbow, the dust discharged from the flue gas desulfurization device 32 of the previous stage falls into the flue gas desulfurization device 32 of the next stage by gravity.
In the multi-stage flue gas desulfurization device 32, the sulfur dioxide sensor 329 is arranged in the first passage 321 of each stage of the desulfurization chamber 320.
In this embodiment, in order to improve desulfurizing tower 3 and to the desorption effect of sulfur dioxide gas, the quantity of flue gas desulfurization device 32 will have been increased, and with each flue gas desulfurization device 32 vertical distribution, the sulfur dioxide gas concentration detects in the gas after last one-level flue gas desulfurization device 32 handles, if still can detect sulfur dioxide gas, then can send gas and dust to further handle in the flue gas desulfurization device 32 of next stage, know that the sulfur dioxide is totally reacted completely.
In addition, the flue gas desulfurization device 32 with multiple stages actually has the effect of caching smoke dust, and the smoke dust can be cached and processed by the previous stage in the closed operation process of the next stage flue gas desulfurization device 32.
In this embodiment, a heating device is disposed on the outer wall of the desulfurization chamber 320, and the heating device is used for heating the desulfurization chamber 320; an embedded temperature sensor 330 is disposed on the inner wall of the desulfurization chamber 320, and the temperature sensor 330 is used for measuring the ambient temperature in the desulfurization chamber 320.
The heating device is an electric heating device, and heating electrodes 327 of the electric heating device are uniformly distributed on the outer wall of the desulfurization chamber 320.
A plurality of ridge-shaped structures which are bulged outwards are uniformly arranged on the outer wall of the desulfurization chamber 320, and mounting grooves are formed in the ridge-shaped structures; the heating electrode 327 of the electric heating device is fixed in the mounting groove.
Because the decomposition of baking soda needs to reach a certain temperature, so as to avoid the temperature of the flue gas not meeting the requirement, a heating device is further arranged on the outer wall of the desulfurization chamber 320 in the embodiment to heat the environment in the desulfurization chamber 320, so that the temperature in the desulfurization chamber 320 reaches the environmental temperature required for completing the chemical reaction.
Example 2
This example differs from example 1 in that:
in this embodiment, as shown in fig. 3, the flue gas desulfurization device 32 further includes a cleaning device, and the cleaning device includes a rotating scraper 331 and a spraying device; as shown in fig. 4, the rotary squeegee 331 includes a connection sleeve, a connection rod, and a wiper strip; the connecting sleeve is sleeved with the part of the rotating shaft of the blending device, which is positioned in the desulfurization chamber 320; the scraping bar is U-shaped and is attached to the inner wall of the desulfurization chamber 320; the length of the vertical rod of the scraping strip is equal to the length of the radius of the circular section of the inner cavity of the desulfurization chamber 320; the length of the cross bar of the scraping bar is equal to the thickness of the inner cavity of the desulfurization chamber 320 along the axial direction; the connecting rod is used for connecting the connecting sleeve and the middle section of the rod body at the inner side of the cross rod of the scraping strip.
Meanwhile, a spray head 328 of the spray device is positioned right above the inner cavity of the desulfurization chamber 320 and is embedded in the inner wall of the desulfurization chamber 320; the spray head 328 is communicated with a water storage device outside the desulfurization chamber 320 through a pipeline penetrating through the outer wall of the desulfurization chamber 320; the power system of the spray device is located outside the desulfurization chamber 320.
The rotating scraper 331 is connected with the rotating shaft in the blending device, so that the rotating scraper 331 also rotates along with the rotating scraper in the rotating process of the impeller 325; when the scraper bar rotates, the scraper bar scrapes the inner wall of the desulfurization chamber 320, so that dust, baking soda powder or sulfate powder attached to the inner wall of the desulfurization chamber 320 can be removed, and the blockage of the desulfurization chamber 320 caused by dust accumulation is prevented.
The operator can also start the spraying device when the equipment is shut down according to the production plan, and clean and maintain the desulfurization chamber 320; the cleanliness inside the desulfurizing tower 3 is further improved, and the safety and the durability of the device are ensured.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a magnesium refining furnace desulfurization dust collector which characterized in that, it includes:
the flue gas collecting device is used for collecting flue gas generated in the operation process of the magnesium refining equipment;
the flue gas conveying device comprises a first induced draft fan and a conveying pipeline; one end of the conveying pipeline is communicated with an outlet of the flue gas collecting device, and the other end of the conveying pipeline is communicated with a flue gas inlet of the desulfurizing tower; the first induced draft fan is connected with the conveying pipeline and used for driving the flue gas in the conveying pipeline to enter the desulfurizing tower from the flue gas collecting device;
the desulfurizing tower comprises a heat-insulating shell and at least one group of flue gas desulfurizing devices; the flue gas desulfurization device comprises a desulfurization chamber, a powder injection device, a blending device, a first valve, a second valve, a third valve and a fourth valve; the desulfurization chamber is a volute-shaped container with a cavity, which is vertically arranged; the outer wall of the desulfurization chamber is provided with channels tangent to the circumferential surface at four positions, namely an upper left position, an upper right position, a lower right position and a lower left position, along the circumferential direction, and the four channels are communicated with the cavity of the desulfurization chamber; the first channel positioned at the upper left position of the desulfurization chamber is a desulfurized clean gas outlet, and the first channel extends upwards; the second channel positioned at the upper right position of the desulfurization chamber is a baking soda powder inlet, and the second channel extends to the right; the third channel positioned at the right lower position of the desulfurization chamber is a dust outlet and extends downwards; the fourth channel positioned at the lower left position of the desulfurization chamber is a flue gas inlet, and the fourth channel extends leftwards; the first valve is arranged at the interface of the first channel and the desulfurization chamber and used for controlling the on-off of the first channel; the second valve is arranged at the interface of the second channel and the desulfurization chamber and is used for controlling the on-off of the second channel; the third valve is arranged at the interface of the third channel and the desulfurization chamber and is used for controlling the on-off of the third channel; the fourth valve is arranged at the interface of the fourth channel and the desulfurization chamber and is used for controlling the on-off of the fourth channel; the powder injection device is positioned at the second channel, and the injection direction of the powder injection device is directed to the inside of the desulfurization chamber along the second channel; the powder injection device is communicated with a sodium bicarbonate feeding device outside the desulfurizing tower through a pipeline; the blending device comprises an impeller, a rotating shaft and a blending driving motor; the impeller is positioned at the center of the desulfurization chamber and is vertically connected with one end of the rotating shaft; the rotating shaft is arranged along the axial direction of the desulfurization chamber and is concentric with the circumferential section of the desulfurization chamber; the other end of the rotating shaft penetrates through the outer wall of the desulfurization chamber and is connected with an output shaft of the blending driving motor through a shaft sleeve; the mixing driving motor is positioned outside the cavity of the desulfurization chamber;
one end of the gas discharge pipeline is communicated with the first channel of the desulfurization chamber, and the other end of the gas discharge pipeline extends upwards to the outside of the desulfurization tower; and
the bag-type dust remover is positioned at the rear section of the desulfurizing tower, and a flue gas inlet of the bag-type dust remover is communicated with a third channel of the desulfurizing chamber; a second induced draft fan for driving the flue gas to transfer is arranged between the connecting pipelines of the two; the bag-type dust collector is used for receiving the mixture of the dust and the gas discharged by the third channel and separating and recycling the dust.
2. The magnesium refining furnace desulfurization dust removal device of claim 1, characterized in that: and the rotating shaft in the blending device is rotatably connected with the outer wall of the desulfurization chamber through a sealed bearing.
3. The magnesium refining furnace desulfurization dust removal device of claim 1, characterized in that: the number of the flue gas desulfurization devices in the desulfurization tower is multiple, and the plurality of the flue gas desulfurization devices are vertically distributed in the desulfurization tower; the flue gas desulfurization device of the next stage is positioned below the flue gas desulfurization device of the previous stage; the first channel and the third channel of the upper-stage flue gas desulfurization device are communicated with each other through a retreatment pipeline, and the other end of the retreatment pipeline is communicated with the fourth channel of the next-stage flue gas desulfurization device; powder injection devices which are mutually independent are arranged in each stage of the flue gas desulfurization device; and the gas discharge pipeline is communicated with the first channel of the last stage of flue gas desulfurization device.
4. The desulfurization and dust removal device of the magnesium refining furnace of claim 3, characterized in that: the reprocessing pipeline is a smooth transition bent pipe, and in the bent pipe, dust discharged by the flue gas desulfurization device at the previous stage slides to the flue gas desulfurization device at the next stage by means of gravity.
5. The desulfurization and dust removal device of the magnesium refining furnace of claim 3, characterized in that: in the multi-stage flue gas desulfurization device, a sulfur dioxide sensor is arranged in a first channel of each stage of desulfurization chamber.
6. The magnesium refining furnace desulfurization dust removal device of claim 1, characterized in that: the outer wall of the desulfurization chamber is provided with a heating device, and the heating device is used for heating the desulfurization chamber; the inner wall of the desulfurization chamber is provided with an embedded temperature sensor, and the temperature sensor is used for measuring the ambient temperature in the desulfurization chamber.
7. The magnesium refining furnace desulfurization dust-removal device of claim 6, characterized in that: the heating device is an electric heating device, and heating electrodes of the electric heating device are uniformly distributed on the outer wall of the desulfurization chamber.
8. The magnesium refining furnace desulfurization dust-removal device of claim 7, characterized in that: a plurality of ridge-shaped structures which are bulged outwards are uniformly arranged on the outer wall of the desulfurization chamber, and mounting grooves are formed in the ridge-shaped structures; and a heating electrode of the electric heating device is fixed in the mounting groove.
9. The magnesium refining furnace desulfurization dust removal device of claim 1, characterized in that: the flue gas desulfurization device also comprises a cleaning device, and the cleaning device comprises a rotary scraper and a spraying device; the rotary scraper comprises a connecting sleeve, a connecting rod and a scraping strip; the connecting sleeve is sleeved with the part of the rotating shaft in the desulfurization chamber in the blending device; the scraping bar is shaped like U and is attached to the inner wall of the desulfurization chamber; the length of a vertical rod of the scraping strip is equal to the length of the radius of the circular section of the inner cavity of the desulfurization chamber; the length of a cross rod of the scraping strip is equal to the thickness of the inner cavity of the desulfurization chamber along the axial direction; one end of the connecting rod is connected to the connecting sleeve, and the other end of the connecting rod is connected to the middle section of the rod body at the inner side of the cross rod of the scraping strip.
10. The magnesium refining furnace desulfurization dust-removal device of claim 9, characterized in that: the spray head of the spray device is positioned right above the inner cavity of the desulfurization chamber and is embedded in the inner wall of the desulfurization chamber; the spray head is communicated with a water storage device outside the desulfurization chamber through a pipeline penetrating through the outer wall of the desulfurization chamber; and the power system of the spraying device is positioned outside the desulfurization chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120286326.0U CN214486377U (en) | 2021-02-01 | 2021-02-01 | Magnesium refining furnace desulfurization dust collector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120286326.0U CN214486377U (en) | 2021-02-01 | 2021-02-01 | Magnesium refining furnace desulfurization dust collector |
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| CN214486377U true CN214486377U (en) | 2021-10-26 |
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| CN202120286326.0U Active CN214486377U (en) | 2021-02-01 | 2021-02-01 | Magnesium refining furnace desulfurization dust collector |
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