Integrated dry desulfurization tower for metal smelting flue gas

Abstract

The application relates to a metal smelting flue gas integrated dry desulfurization tower, belonging to the technical field of flue gas treatment, which comprises a desulfurization tower, a flue gas inlet pipe is arranged in the desulfurization tower, one side of the flue gas inlet pipe is located outside the desulfurization tower, and the other side is located in the desulfurization tower; a fluidized bed is arranged in the flue gas inlet pipe; a nozzle is arranged at the top of the desulfurization tower and is used for spraying adsorbents onto the fluidized bed; a mounting plate is arranged in the flue gas inlet pipe, a plurality of communication holes are formed in the mounting plate, the mounting plate is located below the fluidized bed, a plurality of reaction box bodies are arranged on the mounting plate, the number of the reaction box bodies is consistent with that of the communication holes, an inlet is formed in the bottom of each reaction box body, an outlet is formed in the top of each reaction box body, and opening and closing plates for opening and closing the inlets and the outlets of the reaction box bodies are respectively arranged on the reaction box bodies; material boxes are arranged in the reaction box bodies, adsorbents are arranged in the material boxes, and blowing pieces are arranged on the material boxes and used for driving the adsorbents to diffuse in the reaction box bodies. The application has the advantages of improving the flue gas desulfurization effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas treatment, in particular to a metal smelting flue gas integrated dry desulfurization tower. BACKGROUND

[0002] In the smelting process of metals and some chemical products, a large amount of waste gas is discharged into the atmosphere. These smelting waste gas components are complex and extremely harmful, not only causing serious pollution to the surrounding environment, but also threatening people's health. Therefore, effective smelting waste gas treatment has become a key task for the industrial field to achieve green and sustainable development. Dry desulfurization is a widely used desulfurization technology. Dry desulfurization refers to the use of powdery or granular absorbents, adsorbents or catalysts to remove sulfides in flue gas. CaCO3 sprayed into the furnace is high-temperature calcined and decomposed into CaO, which reacts with SO2 in the flue gas to generate calcium sulfate. The above reaction usually takes place in a desulfurization tower.

[0003] At present, the desulfurization tower usually includes a tower body, a desulfurization cavity is opened; an air inlet assembly is installed on one side of the bottom of the tower body for passing in flue gas; an air outlet assembly is installed on the side of the bottom of the tower body away from the air inlet assembly for passing out flue gas; a pipe passing assembly is installed in the desulfurization cavity; a desulfurization assembly is installed in the pipe passing assembly for desulfurization treatment of the entering flue gas; the desulfurization assembly includes: a fluidized bed installed on the pipe passing assembly; a plurality of Venturi nozzles are uniformly installed on one side of the fluidized bed.

[0004] However, due to the large space in the desulfurization tower, when the powdery or granular absorbent is passed into the desulfurization tower, there is a large difference in the distribution concentration of the absorbent, which causes the entering flue gas to be unable to combine with the absorbent well, thereby resulting in a general desulfurization effect. SUMMARY

[0005] In order to improve the desulfurization effect on flue gas, the present application provides a metal smelting flue gas integrated dry desulfurization tower.

[0006] The metal smelting flue gas integrated dry desulfurization tower provided by the present application adopts the following technical scheme:

[0007] A metal smelting flue gas integrated dry desulfurization tower, comprising a desulfurization tower, a smoke inlet pipe is arranged in the desulfurization tower, one side of the smoke inlet pipe is located outside the desulfurization tower, and the other side is located inside the desulfurization tower, a fluidized bed is arranged in the smoke inlet pipe, a nozzle is arranged at the top of the desulfurization tower, and the nozzle is used to spray absorbent onto the fluidized bed;

[0008] The installation plate is provided with a plurality of communication holes, and is located below the fluidized bed and in a horizontal state.

[0009] The reaction box is provided with a material box, the material box is provided with an adsorbent, and the material box is provided with a soot blowing piece.

[0010] Optionally, the reaction box comprises a cylindrical barrel and a partition plate arranged in the barrel, the smoke inlet is arranged on the partition plate, the bottom of the barrel is open and communicates with the communication hole, the smoke outlet is arranged on the top of the barrel, the opening and closing plate is hinged to the partition plate and the top of the barrel, the hinge axis of the opening and closing plate is parallel to the plate surface of the partition plate, the partition plate divides the barrel into a gas inlet chamber and a reaction chamber, the material box is arranged on the partition plate and located in the reaction chamber, the flue gas entering the smoke inlet pipe enters the gas inlet chamber, and when the gas pressure in the gas inlet chamber increases, the opening and closing plate on the partition plate is opened to enter the reaction chamber; the top of the barrel is provided with a first motor, the opening and closing plate on the top of the barrel is fixedly arranged on the output shaft of the first motor, the reaction chamber is provided with a starting piece, and the starting piece is used to start the first motor to open the smoke outlet after the flue gas reacts with the adsorbent, so that the flue gas and the adsorbent in the reaction chamber enter the fluidized bed.

[0011] Optionally, the starting piece comprises a press switch, a telescopic rod and an air bag, the press switch is arranged in the reaction chamber and located on the inner top wall of the barrel, the press switch is electrically connected with the first motor, the telescopic rod is located directly below the press switch and telescopes towards the press switch, the telescopic rod is in an initial state and is separated from the press switch, the air bag is arranged in the telescopic rod and is used to drive the telescopic rod to abut against the press switch and to pull the telescopic rod to separate from the press switch, after the flue gas enters the reaction chamber and reacts with the adsorbent, the air pressure in the reaction chamber decreases to make the air bag expand, the expansion of the air bag drives the telescopic rod to move towards the press switch and abut against the press switch, the press switch is turned on to start the first motor to drive the opening and closing plate to rotate and open the smoke outlet; when the reaction chamber is opened, the air pressure in the reaction chamber recovers, and the opening and closing plate rotates towards the smoke outlet under the action of gravity to close the smoke outlet.

[0012] Optionally, the top of the barrel is provided with an abutting plate, the abutting plate is an arc plate and abuts against the output shaft of the first motor to apply a load to the output shaft of the first motor, so that the opening and closing plate gradually rotates towards the smoke outlet to close the smoke outlet after the first motor is powered off.

[0013] Optionally, the partition plate is provided with a boss, the boss is provided with a smoke inlet channel communicated with the smoke inlet, the opening and closing plate of the smoke inlet is hinged to the boss, the material box is cylindrical, the top of the material box is open, and the material box is inserted into the boss, the soot blowing piece comprises a plurality of negative pressure fans arranged on the material box, the air inlet end of the negative pressure fan faces the adsorbent, and the air outlet end faces the opening and closing plate of the smoke outlet, and the negative pressure fan sucks the adsorbent to drive the adsorbent to diffuse in the reaction chamber.

[0014] Optionally, a plurality of vertical plates are arranged in the material box, the vertical plates are uniformly arranged along the circumference of the boss, the two sides of the vertical plate are arranged on the outer wall of the boss and the inner wall of the material box respectively, and the bottom wall of the vertical plate is fixedly arranged on the bottom wall of the material box. The vertical plate divides the material box into a plurality of placement grooves for placing the adsorbent, the placement grooves are used for placing the adsorbent at intervals, the negative pressure fan is used for sucking the adsorbent in the placement groove, the plurality of negative pressure fans are rotationally arranged on the material box, and the driving piece is used for driving the negative pressure fan to rotate above the blank placement groove.

[0015] Optionally, a circular ring is rotationally arranged on the boss, the mounting frame of the negative pressure fan is fixedly arranged on the circular ring, the driving piece comprises a second motor embedded on the boss, the length direction of the output shaft of the second motor is parallel to the length direction of the boss, the driving piece further comprises a driving wheel arranged on the output shaft of the second motor, and the driving wheel abuts against the inner ring of the circular ring to drive the circular ring to rotate.

[0016] Optionally, the placement groove for placing the adsorbent is provided with a closing cover, the closing cover is arranged on the top surface of the placement groove, the opening at the top of the closing cover is matched with the negative pressure fan, and when the negative pressure fan operates above the closing cover, the air suction end of the negative pressure fan faces the opening at the top of the closing cover.

[0017] Optionally, the vertical plate is provided with an air inlet hole above the adsorbent, the air inlet hole is communicated with adjacent placement grooves, and the air inlet hole is inclined upward.

[0018] Optionally, the placement groove is provided with a filter screen, the filter screen is arranged above the air inlet hole, and the filter screen is used to disperse the caked adsorbent when the negative pressure fan sucks the adsorbent.

[0019] In summary, the present application has at least one of the following beneficial technical effects:

[0020] 1. When treating the flue gas generated by metal smelting, the flue gas is introduced into the desulfurization tower through the flue gas inlet pipe. After the flue gas enters the flue gas inlet pipe, it flows to the installation plate and enters the reaction box through the communication hole. At this time, the closing plate of the flue gas outlet is closed to temporarily retain the flue gas in the reaction box. Then, the blowing device acts on the adsorbent to make the adsorbent diffuse in the reaction box. After the adsorbent diffuses, it chemically reacts with the flue gas to perform desulfurization. After the flue gas is desulfurized, the flue gas outlet is opened, and the flue gas flows along the flue gas inlet pipe to the fluidized bed. The nozzle sprays the adsorbent onto the fluidized bed. At this time, the adsorbent reacts with the flue gas again to perform secondary desulfurization. The desulfurized flue gas is discharged from the desulfurization tower to complete the desulfurization operation. In the first desulfurization process, the reaction box is small in volume and temporarily sealed due to the desulfurization operation of the flue gas in the reaction box, thereby improving the reaction effect of the adsorbent and the flue gas and the desulfurization effect of the flue gas.

[0021] 2. After the adsorbent in the reaction box diffuses, the concentration of the adsorbent in the reaction box increases, thereby improving the reaction efficiency and effect of the flue gas and the adsorbent. At the same time, compared with injecting the adsorbent into the desulfurization tower, injecting the adsorbent into the reaction box reduces the amount of adsorbent input, reduces the cost of adsorbent input, and improves the treatment effect of the flue gas. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a whole structure schematic diagram of a metal smelting flue gas integrated dry desulfurization tower according to an embodiment of the present application;

[0023] Figure 2 is a sectional view of a desulfurization tower in a metal smelting flue gas integrated dry desulfurization tower according to an embodiment of the present application;

[0024] Figure 3 is a sectional view of a flue gas inlet pipe in a metal smelting flue gas integrated dry desulfurization tower according to an embodiment of the present application;

[0025] Figure 4 is a structure schematic diagram of an installation plate in a metal smelting flue gas integrated dry desulfurization tower according to an embodiment of the present application;

[0026] Figure 5 is a sectional view of a reaction box in a metal smelting flue gas integrated dry desulfurization tower according to an embodiment of the present application;

[0027] Figure 6 is a structure schematic diagram of a starting device in a metal smelting flue gas integrated dry desulfurization tower according to an embodiment of the present application;

[0028] Figure 7 is a sectional view of a boss in a metal smelting flue gas integrated dry desulfurization tower according to an embodiment of the present application;

[0029] Figure 8 is Figure 7An enlarged schematic view of part A.

[0030] Explanation of reference numerals: 1, desulfurization tower; 2, smoke inlet pipe; 3, smoke outlet pipe; 4, fluidized bed; 5, nozzle; 6, mounting plate; 7, communication hole;

[0031] 8, reaction box; 81, cylinder; 82, partition;

[0032] 9, smoke inlet; 10, on-off plate; 11, material box;

[0033] 12, soot blowing piece; 121, negative pressure fan; 122, circular ring; 123, second motor; 124, driving wheel;

[0034] 13, air inlet chamber; 14, reaction chamber; 15, first motor;

[0035] 16, starting piece; 161, press switch; 162, telescopic rod; 163, air bag;

[0036] 17, abutment plate; 18, boss; 19, smoke inlet passage; 20, vertical plate; 21, placing groove; 22, closing cover; 23, air inlet hole; 24, filter screen; 25, smoke outlet. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying Figures 1-8 The present application is further described in detail.

[0038] The embodiment of the present application discloses a metal smelting flue gas integrated dry desulfurization tower. Referring to Figure 1 and Figure 2 , the metal smelting flue gas integrated dry desulfurization tower comprises a desulfurization tower 1, a smoke inlet pipe 2 is arranged in the desulfurization tower 1, one side of the smoke inlet pipe 2 is located outside the desulfurization tower 1, and the other side is located inside the desulfurization tower 1, further, a smoke outlet pipe 3 is arranged in the side wall of the desulfurization tower 1, the smoke outlet pipe 3 is communicated with a cyclone dust collector, the smoke outlet pipe 3 is located at one side of the smoke inlet pipe 2, a fluidized bed 4 is arranged in the smoke inlet pipe 2, a nozzle 5 is arranged at the top of the desulfurization tower 1, and the nozzle 5 is used for spraying an adsorbent on the fluidized bed 4;

[0039] Referring to FIGS. 3 and Figure 4 , the smoke inlet pipe 2 is provided with a mounting plate 6, a plurality of communication holes 7 are arranged on the mounting plate 6, the communication holes 7 penetrate through the mounting plate 6, the mounting plate 6 is located below the fluidized bed 4, the mounting plate 6 is in a horizontal state, a plurality of reaction boxes 8 are arranged on the mounting plate 6, the number of the reaction boxes 8 is consistent with that of the communication holes 7, and the reaction boxes 8 are communicated with the communication holes 7;

[0040] Referring to Figure 5 and Figure 6The bottom of the reaction box 8 is provided with a smoke inlet 9, and the top is provided with a smoke outlet 25. The reaction box 8 is provided with opening and closing plates 10 for opening and closing the smoke inlet 9 and the smoke outlet 25. The closing plate surface of the opening and closing plate 10 is provided with a rubber pad to increase the closing effect of the opening and closing plate 10.

[0041] Referring to Figure 5 and Figure 6 The reaction box 8 is provided with a material box 11. The material box 11 is provided with an adsorbent, including calcium carbonate or sodium bicarbonate, etc. The material box 11 is provided with a soot blowing piece 12 for driving the adsorbent to diffuse in the reaction box 8.

[0042] When treating the smoke generated by metal smelting, the smoke is introduced into the desulfurization tower 1 through the smoke inlet pipe 2. After entering the smoke inlet pipe 2, the smoke flows to the mounting plate 6 and enters the reaction box 8 through the communication hole 7. At this time, the opening and closing plate 10 of the smoke outlet 25 is closed to temporarily retain the smoke in the reaction box 8. Then, the soot blowing piece 12 acts on the adsorbent to make the adsorbent diffuse in the reaction box 8. After the adsorbent diffuses, it chemically reacts with the smoke to perform desulfurization. After the smoke is desulfurized, the smoke outlet 25 is opened, the smoke flows along the smoke inlet pipe 2 to the fluidized bed 4, the nozzle 5 sprays the adsorbent onto the fluidized bed 4, at this time, the adsorbent reacts with the smoke again to perform secondary desulfurization. The desulfurized smoke is discharged from the desulfurization tower 1 to complete the desulfurization. In the first desulfurization process, because the smoke is desulfurized in the reaction box 8, the volume of the reaction box 8 is small and temporarily sealed, thereby improving the reaction effect of the adsorbent and the smoke and improving the desulfurization effect of the smoke.

[0043] Referring to Figure 6 In the embodiment, the reaction box 8 includes a cylindrical cylinder 81 and a partition plate 82 arranged in the cylinder 81. The partition plate 82 is fixedly arranged on the inner wall of the cylinder 81 in the circumferential direction. The smoke inlet 9 is arranged on the partition plate 82. The bottom of the cylinder 81 is open and communicates with the communication hole 7. The smoke outlet 25 is arranged on the top of the cylinder 81. The opening and closing plate 10 is hinged to the top of the partition plate 82 and the cylinder 81. The hinge axis of the opening and closing plate 10 is parallel to the plate surface of the partition plate 82.

[0044] Referring to Figure 6 The partition plate 82 divides the cylinder 81 into a gas inlet chamber 13 and a reaction chamber 14. The material box 11 is arranged on the partition plate 82 and located in the reaction chamber 14.

[0045] Referring to Figure 6, the flue gas from the smoke inlet pipe 2 enters the air inlet chamber 13, when the air pressure of the air inlet chamber 13 increases, the opening and closing plate 10 on the partition plate 82 is opened to enter the reaction chamber 14, in the process of the flue gas in the air inlet chamber 13 entering the reaction chamber 14, the air pressure of the air inlet chamber 13 decreases, the opening and closing plate 10 on the partition plate 82 rotates to close the smoke inlet 9 under the action of gravity, and the next batch of air inlet chamber 13 is closed;

[0046] Referring to Figure 6 Further, the top of the cylinder body 81 is provided with a first motor 15, and the opening and closing plate 10 at the top of the cylinder body 81 is fixedly arranged on the output shaft of the first motor 15, and the first motor 15 drives the opening and closing plate 10 to move out of the smoke outlet 25 or enter;

[0047] Referring to Figure 6 The reaction chamber 14 is provided with a starting member 16, which is used for the reaction of the flue gas and the adsorbent, and is used for starting the first motor 15 to open the smoke outlet 25 to make the flue gas and the adsorbent in the reaction chamber 14 enter the fluidized bed 4.

[0048] The flue gas in the air inlet chamber 13 enters the reaction chamber 14 through the smoke inlet 9, and chemically reacts with the adsorbent in the reaction chamber 14, when the flue gas and the adsorbent react for a period of time, the starting member 16 acts on the first motor 15, the first motor 15 drives the opening and closing plate 10 to rotate to open the smoke outlet 25, after the smoke outlet 25 is opened, the flue gas in the smoke inlet pipe 2 is first injected into the reaction chamber 14, and then carries the flue gas in the reaction chamber 14, the reaction product is removed from the reaction chamber 14 and flows to the fluidized bed 4, and then secondary desulfurization reaction is carried out.

[0049] Referring to Figure 6 In the embodiment of the application, the starting member 16 includes a press switch 161, a telescopic rod 162 and an air bag 163, the press switch 161 is arranged in the reaction chamber 14 and located in the top wall of the cylinder body 81, the press switch 161 is electrically connected with the first motor 15, and the press switch 161 is connected when pressure is applied to the press switch 161, and the press switch 161 is disconnected when the applied pressure is removed; in the embodiment of the application, the first motor 15 is a motor without self-locking function, and the output shaft of the first motor 15 is in a free state when the first motor 15 is powered off;

[0050] Referring to Figure 6The telescopic rod 162 is located right below the pressing switch 161 and is telescopic towards the pressing switch 161, the telescopic rod 162 is in an initial state and is separated from the pressing switch 161, and the distance between the end of the telescopic rod 162 and the pressing switch 161 is less than the inflation distance of the air bag 163. The air bag 163 is arranged in the telescopic rod 162 and is used to drive the telescopic rod 162 to lengthen and abut against the pressing switch 161 and to pull the telescopic rod 162 to shorten and separate from the pressing switch 161.

[0051] When the flue gas enters the reaction chamber 14 and reacts with the adsorbent, because the flue gas inlet 9 and the flue gas outlet 25 are in a closed state, as the reaction of the flue gas and the adsorbent proceeds, the air pressure in the reaction chamber 14 decreases, and the air bag 163 expands after the air pressure decreases. The air bag 163 expands along the length direction of the telescopic rod 162, and the air bag 163 drives the telescopic rod 162 to move towards the pressing switch 161 and abut against the pressing switch 161. After the pressing switch 161 is turned on, the first motor 15 is started to drive the opening and closing plate 10 to rotate and open the flue gas outlet 25. When the reaction chamber 14 is opened, the air pressure in the reaction chamber 14 recovers, the opening and closing plate 10 rotates towards the flue gas outlet 25 under the action of gravity and closes the flue gas outlet 25, and then the flue gas in the air inlet chamber 13 enters the reaction chamber 14 through the flue gas inlet 9.

[0052] Referring to Figure 6 and Figure 6 When the telescopic rod 162 abuts against the pressing switch 161 to start the first motor 15, the opening and closing plate 10 opens the flue gas outlet 25, but after the air pressure in the reaction chamber 14 quickly recovers, the air bag 163 recovers the deformation to drive the telescopic rod 162 to recover the length, the telescopic rod 162 is separated from the pressing switch 161, the first motor 15 is powered off, and the opening and closing plate 10 rotates towards the flue gas outlet 25 in a free state and closes the flue gas outlet 25. Because the opening and closing plate 10 rotates freely, the opening time of the flue gas outlet 25 is short, so that the flue gas and the flue gas mixture in the reaction chamber 14 cannot be fully removed. Therefore, in order to prolong the opening time of the flue gas outlet 25, the top of the cylinder body 81 is provided with an abutting plate 17, the abutting plate 17 is an arc-shaped plate and abuts against the output shaft of the first motor 15 to apply a load to the output shaft of the first motor 15. After the first motor 15 is powered off, the opening and closing plate 10 gradually rotates towards the flue gas outlet 25 to close the flue gas outlet 25. Under the action of the opening and closing plate 10, the opening and closing plate 10 uniformly and slowly rotates towards the flue gas outlet 25 to close the flue gas outlet 25, so that the flue gas and the flue gas mixture have a long time to move out of the reaction chamber 14.

[0053] Referring to Figure 7 , Figure 5 and Figure 6In the embodiment of the present application, the baffle 82 is provided with a boss 18, the boss 18 is provided with a smoke inlet channel 19 communicated with the smoke inlet 9, the opening and closing plate 10 of the smoke inlet 9 is hinged on the boss 18, the material box 11 is cylindrical, has an opening at the top and is inserted on the boss 18, the soot blowing piece 12 comprises a plurality of negative pressure fans 121 arranged on the material box 11, the negative pressure fan 121 has an air inlet end facing the adsorbent and an air outlet end facing the opening and closing plate 10 of the smoke outlet 25, the negative pressure fan 121 sucks the adsorbent in the material box 11 to drive the adsorbent to diffuse in the reaction chamber 14; when the reaction chamber 14 processes the flue gas, the negative pressure fan 121 is started, the negative pressure fan 121 sucks the adsorbent in the material box 11 to make the adsorbent blow to the upper side of the reaction chamber 14 through the fan blades of the negative pressure fan 121, and then the adsorbent diffuses in the reaction chamber 14, so that the operation is simple and convenient; at the same time, when the adsorbent passes through the fan blades, the fan blades hit part of the adsorbent to make the adsorbent move towards the side wall of the reaction chamber 14, so that the adsorbent is uniformly distributed in the reaction chamber 14, and the processing effect of the adsorbent on the flue gas is improved; when the smoke outlet 25 is opened, the negative pressure fan 121 blows the flue gas and the mixture to be discharged from the smoke outlet 25, so that the reaction chamber 14 has space to accommodate the next batch of flue gas.

[0054] With reference to Figure 7 When the adsorbent in the reaction chamber 14 processes the flue gas, the mixture generated by the reaction is easy to fall into the adsorbent, which reduces the adsorption effect of the adsorbent, therefore, in the embodiment of the present application, a plurality of vertical plates 20 are arranged in the material box 11, the vertical plates 20 are uniformly arranged along the circumference of the boss 18, the two sides of the vertical plate 20 are arranged on the outer wall of the boss 18 and the inner wall of the material box 11 respectively, the bottom wall of the vertical plate 20 is fixedly arranged on the bottom wall of the material box 11, the vertical plate 20 divides the material box 11 into a plurality of placement grooves 21 for placing the adsorbent, the placement grooves 21 are spaced apart to place the adsorbent, and the negative pressure fan 121 is used to suck the adsorbent in the placement groove 21; the negative pressure fan 121 is located above the placement groove 21 for placing the adsorbent, the negative pressure fan 121 sucks the adsorbent and makes the adsorbent fill the reaction chamber 14, when the mixture generated by the reaction of the adsorbent and the flue gas falls, under the action of the negative pressure fan 121, the mixture flows towards the blank placement groove 21 and falls into the blank placement groove 21, thereby reducing the influence of the mixture on the adsorbent.

[0055] With reference to Figure 7 and Figure 7, the adsorbent in the reaction chamber 14 is dispersed by the negative pressure fan 121, part of the adsorbent will fall into the blank placement groove 21, resulting in low utilization rate of the adsorbent, therefore, in order to improve the utilization rate of the adsorbent, the plurality of negative pressure fans 121 are rotationally arranged on the material box 11, and the driving member for driving the negative pressure fan 121 to rotate above the blank placement groove 21 is further arranged, the circular ring 122 is rotationally arranged on the boss 18, the mounting frame of the negative pressure fan 121 is fixedly arranged on the circular ring 122, the driving member comprises the second motor 123 embedded on the boss 18, the length direction of the output shaft of the second motor 123 is parallel to the length direction of the boss 18, the driving member further comprises the driving wheel 124 arranged on the output shaft of the second motor 123, and the driving wheel 124 abuts against the inner ring of the circular ring 122 to drive the circular ring 122 to rotate. Because the volume of the reaction chamber 14 is constant, the time from when the flue gas pushes the opening and closing plate 10 to when the opening and closing plate 10 is closed again is determined, therefore, the amount of flue gas entering the reaction chamber 14 is constant, and the amount of adsorbent required is matched with the amount of flue gas, when the dispersed adsorbent reaches the design value, the second motor 123 is started, the second motor 123 drives the driving wheel 124 to rotate, the driving wheel 124 drives the circular ring 122 to rotate, and the circular ring 122 drives the negative pressure fan 121 to rotate above the adjacent placement groove 21, so that the negative pressure fan 121 sucks the mixture and the adsorbent falling into the placement groove 21, and the adsorbent is dispersed in the reaction chamber 14 again, thereby improving the utilization rate of the adsorbent; at the same time, the second motor 123 drives the negative pressure fan 121 to move in the circumferential direction of the reaction chamber 14, thereby improving the complexity of the flow trajectory of the flue gas and the adsorbent, facilitating the contact reaction between the flue gas and the adsorbent, and improving the desulfurization effect of the flue gas.

[0056] With reference to Figure 8 In the embodiment of the present application, the top surface of the placement groove 21 for placing the adsorbent is provided with a closing cover 22, the bottom of the closing cover 22 is arranged on the top surface of the placement groove 21, the opening at the top of the closing cover 22 is matched with the negative pressure fan 121, and when the negative pressure fan 121 operates above the closing cover 22, the suction end of the negative pressure fan 121 is opposite to the opening at the top of the closing cover 22; under the action of the closing cover 22, the opening of the placement groove 21 is shielded, thereby further reducing the possibility of the mixture falling into the adsorbent. At the same time, when the negative pressure fan 121 operates above the top of the closing cover 22, the adsorbent in the placement groove 21 can be easily sucked to disperse in the reaction chamber 14. Further, the vertical plate 20 is provided with an air inlet hole 23 above the adsorbent, the air inlet hole 23 communicates with the adjacent placement groove 21, and the air inlet hole 23 is obliquely upwardly arranged; under the action of the air inlet hole 23, the gas in the adjacent placement groove 21 can enter the placement groove 21, thereby facilitating the dispersion of the adsorbent driven by the negative pressure fan 121; the air inlet hole 23 is above the adsorbent, thereby reducing the possibility that the mixture entering the placement groove 21 through the air inlet hole 23 affects the adsorbent.

[0057] With reference toFigure 7 Figure 7 Further, the placing groove 21 is provided with a filter screen 24 above the air inlet hole 23, and the filter screen 24 is used to disperse the agglomerated adsorbent when the negative pressure fan 121 sucks the adsorbent; meanwhile, under the action of the filter screen 24, the adsorbent below the filter screen 24 can orderly pass through the filter screen 24, so as to control the dispersion amount of the adsorbent and improve the utilization rate of the adsorbent.

[0058] The implementation principle of the metal smelting flue gas integrated dry desulfurization tower according to the embodiment of the application is as follows:

[0059] When the flue gas generated by metal smelting is treated, the flue gas is introduced into the desulfurization tower 1 through the flue gas inlet pipe 2, and then flows along the flue gas inlet pipe 2 to the installation plate 6 and enters the reaction box body 8 through the communication hole 7, at this time, the opening and closing plate 10 of the flue gas outlet 25 is closed to temporarily keep the flue gas in the reaction box body 8, and then the blowing element 12 acts on the adsorbent to make the adsorbent diffuse in the reaction box body 8, the adsorbent diffuses and chemically reacts with the flue gas to perform the desulfurization operation, after the flue gas is desulfurized, the flue gas outlet 25 is opened, the flue gas flows along the flue gas inlet pipe 2 to the fluidized bed 4, the nozzle 5 sprays the adsorbent onto the fluidized bed 4, at this time, the adsorbent reacts with the flue gas again to perform secondary desulfurization, and the desulfurized flue gas is discharged from the desulfurization tower 1 to complete the desulfurization operation; in the first desulfurization process, because the flue gas is desulfurized in the reaction box body 8, the volume of the reaction box body 8 is small and temporarily closed, so that the reaction effect of the adsorbent and the flue gas is improved, and the desulfurization effect of the flue gas is improved.

[0060] The above are the preferred embodiments of the application, and do not limit the protection scope of the application, therefore: any equivalent changes made on the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A metal smelting off-gas integrated dry desulphurization tower characterized by: The application relates to a desulfurization tower (1) which is internally provided with an inlet flue (2) which is located outside the desulfurization tower (1) on one side and inside the desulfurization tower (1) on the other side, and is internally provided with a fluidized bed (4); the top of the desulfurization tower (1) is provided with a nozzle (5) for spraying absorbent onto the fluidized bed (4). The inlet flue (2) is internally provided with a mounting plate (6) which is provided with a plurality of communication holes (7); the mounting plate (6) is located below the fluidized bed (4) and is in a horizontal state; a plurality of reaction box bodies (8) are arranged on the mounting plate (6) and correspond to the communication holes (7); the reaction box body (8) comprises a cylindrical barrel (81) and a partition plate (82) arranged in the barrel (81); an inlet flue (9) is arranged on the partition plate (82); the bottom of the barrel (81) is open and communicates with the communication hole (7); the top of the barrel (81) is provided with an outlet flue (25); the reaction box body (8) is respectively provided with opening and closing plates (10) for opening and closing the inlet flue (9) and the outlet flue (25). The reaction box body (8) is internally provided with a material box (11) which is internally provided with absorbent; the material box (11) is provided with a soot blowing piece (12) for diffusing the absorbent in the reaction box body (8). The partition plate (82) divides the barrel (81) into a gas inlet chamber (13) and a reaction chamber (14); the material box (11) is arranged on the partition plate (82) and located in the reaction chamber (14). The partition plate (82) is provided with a boss (18); the material box (11) is cylindrical, open at the top and inserted into the boss (18); the soot blowing piece (12) comprises a plurality of negative pressure fans (121) arranged on the material box (11). The material box (11) is internally provided with a plurality of vertical plates (20) which divide the material box (11) into a plurality of placement grooves (21) for placing absorbent; the placement grooves (21) are spaced apart to place absorbent; the negative pressure fan (121) is used for sucking the absorbent in the placement groove (21); and a plurality of negative pressure fans (121) are rotationally arranged on the material box (11).

2. The integrated dry desulphurization tower for metal smelting flue gas according to claim 1, characterized in that: The smoke outlet (25) is arranged on the top of the cylinder (81), the opening and closing plate (10) is hinged on the top of the cylinder (81) and the partition plate (82), the hinge axis of the opening and closing plate (10) is parallel to the plate surface of the partition plate (82), the smoke entering the smoke inlet pipe (2) enters the air inlet chamber (13), and the opening and closing plate (10) on the partition plate (82) is opened when the air pressure of the air inlet chamber (13) increases, and then enters the reaction chamber (14); the first motor (15) is arranged on the top of the cylinder (81), the opening and closing plate (10) on the top of the cylinder (81) is fixedly arranged on the output shaft of the first motor (15), the starting piece (16) is arranged in the reaction chamber (14), and the starting piece (16) is used for starting the first motor (15) after the smoke reacts with the adsorbent, so that the smoke and the adsorbent in the reaction chamber (14) enter the fluidized bed (4).

3. The integrated dry desulphurization tower for metal smelting flue gas according to claim 2, characterized in that: The starting piece (16) comprises a press switch (161), a telescopic rod (162) and an air bag (163), the press switch (161) is arranged in the reaction chamber (14) and located on the top wall in the cylinder (81), the press switch (161) is electrically connected with the first motor (15), the telescopic rod (162) is located directly below the press switch (161) and telescopes towards the press switch (161), and the telescopic rod (162) is in an initial state and is separated from the press switch (161); the air bag (163) is arranged in the telescopic rod (162) and is used for driving the telescopic rod (162) to abut against the press switch (161) in the lengthening state and separating the telescopic rod (162) from the press switch (161) in the shortening state; after the smoke enters the reaction chamber (14) and reacts with the adsorbent, the air pressure in the reaction chamber (14) decreases to make the air bag (163) expand, the air bag (163) drives the telescopic rod (162) to move towards the press switch (161) and abut against the press switch (161), the press switch (161) is turned on to start the first motor (15) to drive the opening and closing plate (10) to rotate and open the smoke outlet (25); when the reaction chamber (14) is opened, the air pressure in the reaction chamber (14) recovers, and the opening and closing plate (10) rotates towards the smoke outlet (25) under the action of gravity to close the smoke outlet (25).

4. The integrated dry desulphurization tower for metal smelting flue gas according to claim 3, characterized in that: The top of the cylinder (81) is provided with an abutting plate (17), the abutting plate (17) is an arc plate and abuts against the output shaft of the first motor (15) to apply a load to the output shaft of the first motor (15), so that the opening and closing plate (10) gradually rotates towards the smoke outlet (25) to close the smoke outlet (25) after the first motor (15) is powered off.

5. The integrated dry desulphurization tower for metal smelting flue gas according to claim 2, characterized in that: The boss (18) is provided with a smoke inlet channel (19) communicated with the smoke inlet (9), the opening and closing plate (10) of the smoke inlet (9) is hinged on the boss (18), the air inlet end of the negative pressure fan (121) faces the adsorbent, the air outlet end faces the opening and closing plate (10) of the smoke outlet (25), and the negative pressure fan (121) sucks the adsorbent to make the adsorbent diffuse in the reaction chamber (14).

6. The integrated dry desulphurization tower for metal smelting flue gas according to claim 5, characterized in that: The vertical plate (20) is uniformly arranged along the circumference of the boss (18), two sides of the vertical plate (20) are arranged on the outer wall of the boss (18) and the inner wall of the material box (11) respectively, the bottom wall of the vertical plate (20) is fixedly arranged on the bottom wall of the material box (11), and the driving member for driving the negative pressure fan (121) to rotate above the blank placing groove (21) is further included.

7. The integrated dry desulphurization tower for metal smelting flue gas according to claim 6, characterized in that: The boss (18) is rotationally provided with a circular ring (122), the mounting frame of the negative pressure fan (121) is fixedly arranged on the circular ring (122), the driving member includes a second motor (123) embedded on the boss (18), the length direction of the output shaft of the second motor (123) is parallel to the length direction of the boss (18), and the driving member further includes a driving wheel (124) arranged on the output shaft of the second motor (123), the driving wheel (124) abuts against the inner ring of the circular ring (122) to drive the circular ring (122) to rotate.

8. The integrated dry desulphurization tower for metal smelting flue gas according to claim 6, characterized in that: The top surface of the placing groove (21) for placing the adsorbent is provided with a closing cover (22), the bottom of the closing cover (22) is arranged on the top surface of the placing groove (21), and the opening at the top of the closing cover (22) is matched with the negative pressure fan (121); when the negative pressure fan (121) operates above the closing cover (22), the suction end of the negative pressure fan (121) is opposite to the opening at the top of the closing cover (22).

9. The integrated dry desulphurization tower for metal smelting flue gas according to claim 8, characterized in that: The air inlet hole (23) is arranged on the vertical plate (20) and above the adsorbent, the air inlet hole (23) is communicated with adjacent placing grooves (21), and the air inlet hole (23) is obliquely arranged upwards.

10. The metal smelting flue gas integrated dry desulfurization tower according to claim 9, characterized in that: The filter screen (24) is arranged in the placing groove (21), the filter screen (24) is located above the air inlet hole (23), and the filter screen (24) is used for dispersing the caked adsorbent when the negative pressure fan (121) sucks the adsorbent.

Images