Intelligent desulfurization equipment and method capable of accurately adding ammonia

Abstract

The invention relates to the technical field of flue gas desulfurization, in particular to intelligent desulfurization equipment capable of accurately adding ammonia and a method thereof.The desulfurization equipment comprises a barrel, a flue gas discharge pipe is fixedly installed at the top end of the outer side of the barrel, and a desulfurization treatment mechanism used for removing sulfur oxides in flue gas is arranged in the middle of the inner side of the barrel; an ammonia escape treatment mechanism located above the desulfurization treatment mechanism and a desulfurization product treatment mechanism located below the desulfurization treatment mechanism are further arranged on the inner side of the barrel. The desulfurization method comprises the steps of flue gas pretreatment; flue gas desulfurization; absorbing escaped ammonia; according to the method, sulfur oxides in the flue gas and escaping ammonia generated in the desulfurization process can be fully absorbed, pollution to the environment is reduced, meanwhile, primary products generated in the desulfurization process can be further oxidized, and the stability of the desulfurization products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization, and specifically to an intelligent desulfurization device and method with precise ammonia addition. Background Art

[0002] Flue gas desulfurization equipment is mainly used to treat sulfur-containing flue gas discharged during industrial production processes to reduce environmental pollution. The flue gas contains a large amount of sulfides, especially sulfur dioxide, which are harmful to air quality and human health. Therefore, effective desulfurization treatment is required before discharging it into the atmosphere.

[0003] The prior art discloses a Chinese patent with the publication number CN 212440727 U: an ammonia method high-efficiency and uniform absorption type desulfurization device, and discloses an ammonia water spraying device. When spraying ammonia water through a rotating nozzle in the desulfurization tower, the rotating nozzle will be automatically rotated by the centrifugal force and reaction force of the ammonia water, increasing the contact area between the ammonia water and the flue gas.

[0004] However, the above prior art still has certain defects. During use, although the rotating spraying method can increase the contact area between the ammonia water and the flue gas, there will still be a situation where the flue gas contacts the ammonia water, thus affecting the desulfurization effect of the flue gas. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent desulfurization device and method with precise ammonia addition to solve the problems raised in the above background art.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An intelligent desulfurization device with precise ammonia addition includes a cylinder body. A flue gas discharge pipe is fixedly installed at the top end of the outer side of the cylinder body. A desulfurization treatment mechanism for removing sulfur oxides in the flue gas is provided in the middle of the inner side of the cylinder body, and an ammonia escape treatment mechanism is provided above the desulfurization treatment mechanism and a desulfurization product treatment mechanism is provided below the desulfurization treatment mechanism on the inner side of the cylinder body;

[0008] The desulfurization treatment mechanism includes a desulfurization box and a vertical shaft rotatably installed on the axis of the cylinder body. The bottom end of the vertical shaft extends into the desulfurization box. A cross bar one is fixedly connected between the outer side of the desulfurization box and the inner wall of the cylinder body. A support column is fixedly provided on the bottom end face inside the desulfurization box. An ultrasonic vibration plate one is fixedly installed at the top end of the support column. The bottom of the desulfurization box is communicated with a flue gas inlet pipe, an ammonia gas inlet pipe, and a water inlet pipe, and the ends of the flue gas inlet pipe, the ammonia gas inlet pipe, and the water inlet pipe communicating with the desulfurization box are all located directly below the ultrasonic vibration plate one;

[0009] Control valves one and flow meters are installed at the connection points of the flue gas inlet pipe, the ammonia gas inlet pipe, and the water inlet pipe with the desulfurization box. A stirring rod is fixedly provided on the outer side of the end of the vertical shaft extending into the desulfurization box.

[0010] In a preferred embodiment, the ammonia leakage treatment mechanism includes an annular arc cover fixed to the inner side of the cylinder body and a water storage tray located at the top of the annular arc cover. A second cross bar is fixedly connected between the outer side of the water storage tray and the inner wall of the cylinder body. The bottom of the water storage tray is fixedly connected with an air guiding arc cover sleeved on the outer side of the upper end of the annular arc cover.

[0011] A plurality of groups of water leakage grooves are formed in the bottom of the water storage tray and are evenly distributed in a ring shape. An annular channel is fixedly arranged at the position corresponding to each group of water leakage grooves at the bottom of the water storage tray. The minimum diameter of the innermost annular channel is greater than the maximum diameter of the air guiding arc cover.

[0012] In a preferred embodiment, the ammonia leakage treatment mechanism further includes a booster pump fixedly installed on the outer side of the annular arc cover and a water distribution pipe for connecting the water storage tray and the water inlet pipe. The water outlet end of the booster pump is connected with a water return pipe. The water outlet end of the water return pipe sequentially penetrates through the annular arc cover and the desulfurization tank and extends to the bottom of the first ultrasonic vibration plate.

[0013] In a preferred embodiment, the desulfurization product treatment mechanism includes two limiting rings fixedly arranged on the inner side of the cylinder body. A support plate movably sleeved on the outer side of the water inlet pipe is slidably installed between the two limiting rings. A ring cylinder is fixedly arranged on the top of the support plate. A partition plate is fixedly arranged in the middle of the inner side of the ring cylinder. Liquid level sensors are installed on both sides of the partition plate. Two circular pipes are fixedly penetrated through the outer side of the ring cylinder.

[0014] An inclined elliptical plate is fixedly arranged on the inner side of the cylinder body. A leakage hole is formed through the lower end of the elliptical plate. A water guiding arc plate is fixedly arranged at the position corresponding to the leakage hole at the bottom of the elliptical plate. The lower end of the water guiding arc plate extends to the position where the inner side of the ring cylinder is located.

[0015] A ring block corresponding to the circular pipe is further fixedly arranged on the inner side of the cylinder body. The opposite ends of the two circular pipes are respectively in contact with the inner side of the ring block. A liquid discharge pipe fixedly penetrating through the cylinder body and the ring block is arranged on the outer side of the cylinder body. An oxygen supply pipe is communicated with the liquid discharge pipe. Control valves II are installed on both the liquid discharge pipe and the oxygen supply pipe.

[0016] In a preferred embodiment, the desulfurization product treatment mechanism further includes a driving part for driving the support plate to rotate. The driving part includes a support seat fixed on the inner side of the cylinder body and a gear ring fixed on the bottom of the support plate. A servo motor is fixedly installed on the top of the support seat. The end of the output shaft of the servo motor is fixedly connected with a gear meshing with the gear ring.

[0017] In a preferred embodiment, an elastic telescopic member I is fixedly installed at the bottom of the upper end of the elliptical plate. One end of the elastic telescopic member I is fixedly connected with an arc cover. A second ultrasonic vibration plate is fixedly installed on the inner side of the arc cover.

[0018] In a preferred embodiment, a desulfurized flue gas treatment mechanism is provided at the top end inside the cylinder body. The desulfurized flue gas treatment mechanism includes a condensation cone block and a conical cover fixed to the top inside the cylinder body. The conical cover is sleeved outside the condensation cone block. One end of a flue gas discharge pipe is communicated with the inside of the conical cover. The condensation cone block is movably sleeved outside a vertical shaft. A separating ring is fixedly connected between the bottom end outside the conical cover and the inner wall of the cylinder body.

[0019] A spiral channel is formed on the outside of the condensation cone block. A plurality of water guide rings are fixedly arranged on the inside of the conical cover from top to bottom. The inside of the water guide rings is attached to the outside of the condensation cone block, and a plurality of through grooves uniformly distributed in a ring shape are formed on the outside of the water guide rings.

[0020] In a preferred embodiment, a flue gas pretreatment mechanism is installed on the flue gas inlet pipe. The flue gas pretreatment mechanism includes a connecting ring, a wind guide ring cover arranged inside the flue gas inlet pipe, and a filter screen. A slag discharge pipe is communicated with the bottom end of the connecting ring. The flue gas inlet pipe is of a two-section structure. The wind guide ring cover and the filter screen are respectively fixed inside the two sections of the flue gas inlet pipe. The connecting ring is detachably installed between the two sections of the flue gas inlet pipe through locking bolts.

[0021] At the axial center line position of the filter screen, a wheel shaft is rotatably installed in a penetrating manner. An impeller is fixedly installed on the outside of one end of the wheel shaft away from the wind guide ring cover. One end of the wheel shaft close to the wind guide ring cover is threadedly connected with a cap nut. A plurality of cleaning components uniformly distributed in a ring shape are fixedly arranged on the outside of the cap nut.

[0022] The cleaning component includes a wind protection cover fixed to the outside of the cap nut. An elastic telescopic member II is fixedly installed inside the wind protection cover. One end of the elastic telescopic member II is fixedly connected with a mounting strip, and a cleaning brush is detachably installed on the outside of the mounting strip.

[0023] The present invention also provides a method for desulfurizing flue gas by using the above-mentioned intelligent desulfurization equipment with precise ammonia addition. The specific operation steps are as follows:

[0024] S1. Flue gas pretreatment: During the process of sending the flue gas to be treated into the cylinder body from the flue gas inlet pipe through an induced draft fan, the filter screen with cleaning components is used to filter solid particles in the flue gas.

[0025] S2. Flue gas desulfurization: The filtered flue gas, ammonia gas, and water are respectively introduced into the desulfurization tank through the flue gas inlet pipe, ammonia inlet pipe, and water inlet pipe in proportion. The high-frequency vibration generated by the ultrasonic vibration plate I is transmitted to the treatment liquid, and continuous agitation is carried out in cooperation with the stirring rod at the bottom end of the vertical shaft, so that sulfur oxides in the flue gas are fully absorbed by ammonia water.

[0026] S3. Ammonia escape absorption: Use the multi-layer water curtain formed by draining water through multiple annular channels at the bottom of the water storage tray to fully absorb the ammonia escaped during the S2 process, and use the booster pump frame to send the ammonia water formed by absorbing the escaped ammonia back to the interior of the desulfurization box to continue reacting with the sulfur oxides in the flue gas;

[0027] S4. Desulfurization product treatment and desulfurized flue gas treatment: ① As the S2 process continues, the ammonium sulfite generated by the reaction of ammonia water and sulfur oxides is likely to gradually overflow from the desulfurization box and be collected inside the annular cylinder. Use the high-frequency vibration generated by the ultrasonic vibration plate II to transfer energy to the treatment liquid, and let the introduced oxygen oxidize the ammonium sulfite into more stable ammonium sulfate, and then discharge and transport it to the ammonium salt production station for processing;

[0028] ② The flue gas after desulfurization treatment and ammonia escape absorption treatment is transported upward to the condensation treatment station for temperature reduction treatment to reduce the generation of white smoke at the outlet position of the flue gas discharge pipe.

[0029] Advantages of the present invention:

[0030] 1. In the present invention, the high-frequency vibration generated by the ultrasonic vibration plate I is used to transfer energy to the treatment liquid, causing the bubbles generated during the ventilation process to burst, enabling water to fully absorb ammonia and sulfur oxides in the flue gas. At the same time, in cooperation with the continuous agitation of the stirring rod at the bottom of the vertical shaft, the water absorbing sulfur oxides and the water absorbing ammonia are fully mixed and react;

[0031] 2. In the present invention, the water leaking through the water leakage groove forms a multi-layer annular water curtain under the action of the annular channel to absorb part of the ammonia that overflows without being dissolved in water in time, and use the booster pump to pump the ammonia water generated by absorbing the escaped ammonia into the interior of the desulfurization box to react with the aqueous solution absorbing sulfur oxides in the flue gas, realizing the full utilization of ammonia and avoiding ammonia pollution;

[0032] 3. In the present invention, the rotating gear intermittently drives the gear ring to drive the tray to rotate 180°, enabling the two storage areas inside the annular cylinder to alternately switch between the ammonium sulfite solution collection station and the ammonium sulfite solution oxidation station, realizing the continuous and synchronous collection and oxidation processes of the ammonium sulfite solution and improving the treatment efficiency;

[0033] 4. In the present invention, by using the cooperation of the isolation ring, the conical cover condensation cone block and the water guide ring, it is possible to prevent the formation of white mist at the outlet end of the flue gas discharge pipe during the discharge of the high-temperature flue gas after desulfurization treatment, and at the same time, realize the reuse of the small droplets generated after condensation and liquefaction;

[0034] 5. The present invention can filter, automatically clean and collect the solid particles mixed in the flue gas, avoiding the need for irregular ash cleaning operations. Moreover, the flue gas pretreatment mechanism is convenient to disassemble and assemble and easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts;

[0036] Figure 1 is a schematic diagram of the overall structure from the first perspective of the present invention;

[0037] Figure 2 is a schematic diagram of the overall structure from the second perspective of the present invention;

[0038] Figure 3 is a schematic diagram of the internal structure of the cylinder of the present invention;

[0039] Figure 4 is the present invention Figure 2 schematic diagram of the upper-middle part structure;

[0040] Figure 5 is the present invention Figure 2 schematic diagram of the sectional structure;

[0041] Figure 6 is the present invention Figure 2 schematic diagram of the partial decomposition of the upper-middle part structure;

[0042] Figure 7 is the present invention Figure 2 schematic diagram of the lower-middle part structure;

[0043] Figure 8 is the present invention Figure 7 schematic diagram of the middle lateral sectional structure;

[0044] Figure 9 is the present invention Figure 7 schematic diagram of the middle front sectional structure;

[0045] Figure 10 is a schematic diagram of the structure of the flue gas pretreatment mechanism of the present invention;

[0046] Figure 11 is a schematic diagram of the decomposition of the impeller and cleaning assembly of the flue gas pretreatment mechanism of the present invention;

[0047] Figure 12 is a schematic diagram of the partial sectional structure of the cleaning assembly of the present invention.

[0048] The reference numerals in the drawings are as follows: 1, cylinder body; 2, flue gas discharge pipe; 3, desulfurization treatment mechanism; 31, desulfurization box; 32, first cross bar; 33, flue gas inlet pipe; 34, ammonia inlet pipe; 35, water inlet pipe; 36, first ultrasonic vibration plate; 37, vertical shaft; 4, ammonia escape treatment mechanism; 41, annular arc cover; 42, water storage tray; 43, air guiding arc cover; 44, water leakage groove; 45, annular channel; 46, water distribution pipe; 47, booster pump; 48, water return pipe; 49, second cross bar; 5, desulfurization product treatment mechanism; 51, elliptical plate; 52, leakage hole; 53, water guiding arc plate; 54, first elastic telescopic member; 55, limiting ring; 56, supporting plate; 57, ring block; 58, ring cylinder; 59, supporting seat; 510, gear; 511, gear ring; 512, protective cover; 513, second ultrasonic vibration plate; 514, liquid level sensor; 515, liquid discharge pipe; 516, oxygen supply pipe; 6, desulfurized flue gas treatment mechanism; 61, isolation ring; 62, conical cover; 63, condensation cone block; 64, spiral channel; 65, water guiding ring; 66, through groove; 7, flue gas pretreatment mechanism; 71, connecting ring; 72, air guiding ring cover; 73, filter screen; 74, impeller; 75, cleaning assembly; 751, windproof cover; 752, second elastic telescopic member; 76, slag discharge pipe. Specific embodiments

[0049] 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 belong to the scope of protection of the present invention.

[0050] The desulfurization treatment equipment of the present invention belongs to the energy conservation and environmental protection industry and is a part of the flue gas treatment equipment. It is mainly used to remove sulfur oxides in the sulfur-containing flue gas and reduce air pollution. The specific application fields include industries such as electric power, steel, chemical industry, cement, and metallurgy.

[0051] Example 1: Refer to the attached drawings of the specification Figures 1 - 5 As shown, a precise ammonia addition intelligent desulfurization equipment according to an embodiment of the present invention includes a cylinder body 1. A flue gas discharge pipe 2 is fixedly installed at the top end outside the cylinder body 1. A desulfurization treatment mechanism 3 for removing sulfur oxides (generally referring to sulfur dioxide and sulfur trioxide) in the flue gas is provided in the middle inside the cylinder body 1;

[0052] The desulfurization treatment mechanism 3 includes a desulfurization tank 31 and a vertical shaft 37 rotatably installed on the axis of the cylinder body 1. The bottom end of the vertical shaft 37 extends into the desulfurization tank 31. A first cross bar 32 is fixedly connected between the outer side of the desulfurization tank 31 and the inner wall of the cylinder body 1. A support column is fixedly provided on the inner bottom end surface of the desulfurization tank 31, and a first ultrasonic vibration plate 36 is fixedly installed at the top of the support column. The bottom of the desulfurization tank 31 is communicated with a flue gas inlet pipe 33, an ammonia inlet pipe 34 and a water inlet pipe 35. The ends of the flue gas inlet pipe 33, the ammonia inlet pipe 34 and the water inlet pipe 35 communicating with the desulfurization tank 31 are all located directly below the first ultrasonic vibration plate 36. Among them, the support column can be used to form a cavity between the inner bottom end surface of the desulfurization tank 31 and the first ultrasonic vibration plate 36 to block the flue gas and ammonia introduced into the desulfurization tank 31, so that the gas diffuses to the periphery along the bottom of the first ultrasonic vibration plate 36, prolonging the time of the gas in the water, ensuring that the sulfur oxides in the ammonia and the flue gas are fully dissolved in the water and related reactions occur;

[0053] Control valves I and flow meters are installed at the connection parts of the flue gas inlet pipe 33, the ammonia inlet pipe 34 and the water inlet pipe 35 with the desulfurization tank 31. Among them, a sensor for detecting the concentration of sulfur oxides in the flue gas sold on the market should also be installed at the gas inlet end of the flue gas inlet pipe 33, and the ammonia addition should be accurately controlled in cooperation with the flow meter. A stirring rod is fixedly provided on the outer side of the end of the vertical shaft 37 extending into the desulfurization tank 31, and a driving motor for driving the rotation of the vertical shaft 37 is fixedly installed at the top of the cylinder body 1.

[0054] It should be noted that during the process of introducing filtered flue gas, ammonia and water into the desulfurization tank 31 in proportion through the flue gas inlet pipe 33, the ammonia inlet pipe 34 and the water inlet pipe 35, water is preferentially introduced to submerge the bottom end surface of the first ultrasonic vibration plate 36 to prevent the sulfur oxides and ammonia in the introduced flue gas from directly escaping before they have time to dissolve in the water. And during the process of continuously introducing filtered flue gas, ammonia and water into the desulfurization tank 31 in proportion through the flue gas inlet pipe 33, the ammonia inlet pipe 34 and the water inlet pipe 35 respectively, the first ultrasonic vibration plate 36 and the driving motor are always in the working state, so as to transfer the energy generated by the high-frequency vibration of the first ultrasonic vibration plate 36 to the treatment liquid, break the bubbles generated during the ventilation process, make the water fully absorb the ammonia and the sulfur oxides in the flue gas. At the same time, in cooperation with the continuous stirring of the stirring rod at the bottom end of the vertical shaft 37, the water absorbing sulfur oxides and the water absorbing ammonia are fully mixed and react to generate ammonium sulfite.

[0055] Example 2: Refer to the attached drawings of the specification Figures 3 - 6As shown in the figure, an intelligent desulfurization device for precise ammonia addition according to an embodiment of the present invention has an ammonia leakage treatment mechanism 4 inside the cylinder body 1 above the desulfurization treatment mechanism 3. The ammonia leakage treatment mechanism 4 includes a fixed annular arc cover 41 inside the cylinder body 1 and a water storage tray 42 at the top of the annular arc cover 41. A second cross bar 49 is fixedly connected between the outer side of the water storage tray 42 and the inner wall of the cylinder body 1. A wind guiding arc cover 43 sleeved on the outer side of the upper end of the annular arc cover 41 is fixedly connected to the bottom of the water storage tray 42, and the top end of the annular arc cover 41 extends into the interior of the wind guiding arc cover 43 to use the wind guiding arc cover 43 to guide the overflowing ammonia gas to flow into the area enclosed between the outer side of the annular arc cover 41 and the inner wall of the cylinder body 1:

[0056] A plurality of groups of leaky grooves 44 evenly distributed in a ring shape are formed at the bottom of the water storage tray 42. The circular tracks enclosed by the plurality of groups of leaky grooves 44 evenly distributed in a ring shape are concentrically arranged. And an annular channel 45 is fixedly provided at the position corresponding to each group of leaky grooves 44 at the bottom of the water storage tray 42. Among them, the axial section of the annular channel 45 is set as a semi-annular shape, and a leaky ring groove is opened in the middle of the bottom of each annular channel 45. At the same time, the water leakage rate of the leaky grooves 44 is greater than the water leakage rate of the leaky ring grooves on the annular channel 45 to ensure that the water leaking through the leaky ring grooves can form an annular water curtain. The minimum diameter of the innermost annular channel 45 is greater than the maximum diameter of the wind guiding arc cover 43;

[0057] The ammonia leakage treatment mechanism 4 further includes a booster pump 47 fixedly installed on the outer side of the annular arc cover 41 and a water distribution pipe 46 for connecting the water storage tray 42 and the water inlet pipe 35. The water outlet end of the booster pump 47 is connected with a return water pipe 48. The water outlet end of the return water pipe 48 sequentially penetrates through the annular arc cover 41 and the desulfurization box 31 and extends to the bottom of the first ultrasonic vibrating plate 36.

[0058] It should be noted that before introducing ammonia gas into the desulfurization box 31, it is necessary to use the water distribution pipe 46 to drain a part of the water on the water inlet pipe 35 into the water storage tray 42, so that the water leaking from the leaky grooves 44 on the water storage tray 42 forms a multi-layer annular water curtain under the action of the annular channel 45. When ammonia gas is introduced, part of the ammonia gas that is not dissolved in water in time will escape from the desulfurization box 31 and flow upward together with the flue gas after desulfurization treatment. Then, under the guidance of the wind guiding arc cover 43, it flows into the area enclosed between the outer side of the annular arc cover 41 and the inner wall of the cylinder body 1, and during the process of passing through the multi-layer water curtain, the ammonia gas mixed in it is fully absorbed by the water curtain;

[0059] After the water curtain absorbs the escaping ammonia, ammonia water will be formed and then accumulate in the area enclosed between the outer side of the annular arc cover 41 and the inner wall of the cylinder body 1. When the accumulated ammonia water reaches a certain level, the booster pump 47 will be started to pump the ammonia water accumulated in this area into the area enclosed between the ultrasonic vibration plate 36 and the inner bottom of the desulfurization tank 31 inside the desulfurization tank 31, so that it reacts with the aqueous solution that absorbs sulfur oxides in the flue gas, realizing the full utilization of ammonia gas and avoiding ammonia gas pollution.

[0060] Embodiment 3: Refer to the attached drawings of the specification Figures 1 - 3 and Figures 7 - 9 As shown, an intelligent desulfurization device for precise ammonia addition according to an embodiment of the present invention. Inside the cylinder body 1, a desulfurization product treatment mechanism 5 is provided below the desulfurization treatment mechanism 3. The desulfurization product treatment mechanism 5 includes two limiting rings 55 fixedly arranged inside the cylinder body 1. A support plate 56 that is movably sleeved outside the water inlet pipe 35 is slidably installed between the two limiting rings 55. A ring cylinder 58 is fixedly arranged on the top of the support plate 56. A partition plate is fixedly arranged in the middle of the inner side of the ring cylinder 58. Liquid level sensors 514 are installed on both sides of the partition plate. Two round tubes are fixedly and penetratingly arranged on the outer side of the ring cylinder 58. Among them, the inner side of the ring cylinder 58 can be divided into two storage areas by using the partition plate, and each of the two storage areas corresponds to a round tube;

[0061] An elliptical plate 51 that is inclined is fixedly arranged inside the cylinder body 1. A leakage hole 52 is formed through the low-position end of the elliptical plate 51. A water guide arc plate 53 is fixedly arranged at the position corresponding to the leakage hole 52 at the bottom of the elliptical plate 51. The low-position end of the water guide arc plate 53 extends to the position inside the ring cylinder 58. Among them, the inclined elliptical plate 51 can be used to guide the ammonium sulfite solution that overflows from the desulfurization tank 31 to the leakage hole 52, so that the ammonium sulfite solution smoothly flows into the corresponding storage area through the water guide arc plate 53. In addition, an air hole is also provided at the position on the outer side of the cylinder body 1 corresponding to the cavity enclosed between the elliptical plate 51 and the support plate 56;

[0062] Ring blocks 57 corresponding to the round tubes are also fixedly arranged inside the cylinder body 1. The opposite ends of the two round tubes are both in contact with the inner sides of the ring blocks 57. The ring blocks 57 can be used to block the round tubes to prevent the ammonium sulfite solution inside the corresponding storage area from leaking out. A drain pipe 515 that fixedly penetrates the cylinder body 1 and the ring block 57 is provided on the outer side of the cylinder body 1. Among them, the end face of the liquid inlet end of the drain pipe 515 and the inner side surface of the ring block 57 are in a coplanar setting, so as to facilitate the discharge of the ammonium sulfite solution inside the corresponding storage area when the subsequent round tube is communicated with the drain pipe 515. An oxygen supply pipe 516 is communicated with the drain pipe 515, and control valves II are installed on both the drain pipe 515 and the oxygen supply pipe 516;

[0063] The desulfurization product treatment mechanism 5 further includes a driving part for driving the pallet 56 to rotate. The driving part includes a support seat 59 fixed inside the cylinder body 1 and a gear ring 511 fixed to the bottom of the pallet 56. A servo motor is fixedly installed at the top of the support seat 59, and the end of the output shaft of the servo motor is fixedly connected to a gear 510 meshing with the gear ring 511.

[0064] It should be noted that in the initial state, both storage areas are in a vacant state. One of the round tubes is in a state of being connected to the drain pipe 515, and the other round tube is blocked by the inner side of the ring block 57. And the middle of the storage area corresponding to the blocked round tube is aligned with the leakage hole 52. During the process of treating the desulfurization product, as the flue gas desulfurization process continues, the generated ammonium sulfite solution will gradually move upward under the continuous input of water at the lower end, and finally overflow from the desulfurization tank 31. The overflowed ammonium sulfite solution will directly fall onto the top of the elliptical plate 51, then approach the leakage hole 52, pass through the leakage hole 52, and flow into the corresponding storage area under the guidance of the water guiding arc plate 53. When the liquid level sensor 514 inside the storage area detects that the liquid level of the ammonium sulfite solution has risen to the specified height, it will transmit an electrical signal to the control end. The control end controls the servo motor to drive the gear 510 to rotate, and uses the rotating gear 510 to drive the gear ring 511 to rotate, so that the rotating gear ring 511 drives the pallet 56 to rotate 180°, switching the storage area filled with ammonium sulfite solution to the position corresponding to the drain pipe 515, and the other initially vacant storage area will be switched to the position for collecting ammonium sulfite solution.

[0065] When the storage area filled with ammonium sulfite solution is switched to the position corresponding to the drain pipe 515, it is necessary to first close the control valve two on the drain pipe 515, and open the control valve two on the oxygen supply pipe 516, and continuously introduce oxygen into the ammonium sulfite solution through the oxygen supply pipe 516 to oxidize the ammonium sulfite solution into a more stable ammonium sulfate solution. During this process, after the excess oxygen escapes from the ammonium sulfate solution, it will be discharged from the air holes on the cylinder body 1. Subsequently, close the control valve two on the oxygen supply pipe 516, and open the control valve two on the drain pipe 515 to discharge the ammonium sulfate solution for transportation to the ammonium salt production station for processing. In this way, the collection and oxidation processes of the ammonium sulfite solution can be carried out synchronously, improving the processing efficiency.

[0066] During this period, the oxygen escaping from the air holes can be collected and reused by a collection mechanism (not specifically shown in the drawings) to reduce waste.

[0067] Specifically, as Figure 9 shown, an elastic telescopic member one 54 is fixedly installed at the bottom of the high-position end of the elliptical plate 51. One end of the elastic telescopic member one 54 is fixedly connected to an arc cover 512, and an ultrasonic vibration plate two 513 is fixedly installed inside the arc cover 512.

[0068] It should be noted that the first elastic telescopic member 54 is composed of a cylinder with a square groove, a square column inserted into the square groove, and a spring. The cylinder is fixed at the top of the arc cover 512, the top of the square column is fixed at the bottom of the elliptical plate 51, and both ends of the spring are respectively connected to the elliptical plate 51 and the cylinder. Among them, when the spring is in the natural state, the bottom end of the square column always remains inserted into the square groove inside the cylinder. In this state, the bottom end of the ultrasonic vibration plate two 513 will sink into the solution in the corresponding storage area. The high-frequency vibration generated by the ultrasonic vibration plate two 513 can be used to transfer energy to the processing liquid, causing the bubbles generated during the continuous oxygen supply process to burst, so that the ammonium sulfite inside the storage area is fully oxidized by oxygen.

[0069] Example 4: Refer to the attached drawings of the specification Figures 3 - 6 As shown, an intelligent desulfurization device for precise ammonia addition according to an embodiment of the present invention. A desulfurization flue gas treatment mechanism 6 is provided at the inner top end of the cylinder body 1. The desulfurization flue gas treatment mechanism 6 includes a condensation cone block 63 and a conical cover 62 fixed at the inner top of the cylinder body 1. The conical cover 62 is sleeved outside the condensation cone block 63. One end of the flue gas discharge pipe 2 is connected to the inside of the conical cover 62. The condensation cone block 63 is movably sleeved outside the vertical shaft 37. A separation ring 61 is fixedly connected between the outer bottom end of the conical cover 62 and the inner wall of the cylinder body 1. The separation ring 61 can be used to guide the desulfurization flue gas after absorbing ammonia into the cavity between the conical cover 62 and the condensation cone block 63.

[0070] A spiral channel 64 is opened on the outside of the condensation cone block 63, and a plurality of water guide rings 65 are fixedly arranged on the inside of the conical cover 62 from top to bottom. Among them, the inner side of the spiral channel 64 is set as an inclined surface. At the same time, the upper surface and the lower surface of the water guide ring 65 are both set as arc surfaces (see Figure 5 ), the inner side of the water guide ring 65 fits with the outside of the condensation cone block 63, and a plurality of through grooves 66 evenly distributed in a ring shape are opened on the outside of the water guide ring 65.

[0071] It should be noted that during the process of treating the desulfurization flue gas, the desulfurization flue gas after absorbing ammonia will enter the cavity between the conical cover 62 and the condensation cone block 63 under the guidance of the separation ring 61, and is conveyed upward along the spiral channel 64 under the blockage of the water guide ring 65, extending the contact time between the desulfurization flue gas and the condensation cone block 63, reducing the temperature of the flue gas, thereby avoiding the formation of white mist at the outlet end of the flue gas discharge pipe 2 during the discharge of the high-temperature flue gas after desulfurization treatment. During this process, the condensation cone block 63 can also condense and liquefy the steam mixed in the high-temperature flue gas after desulfurization treatment into small liquid droplets, which flow down along the upper arc surface of the water guide ring 65, and finally discharge from the through grooves 66 on the water guide ring 65 and fall back into the area surrounded by the outside of the annular arc cover 41 and the inner wall of the cylinder body 1, and are recycled to the inside of the desulfurization tank 31 together with the water absorbing ammonia.

[0072] Example 5: Refer to the attached drawings of the specificationFigure 1 and Figures 10 - 12 For an intelligent desulfurization device with precise ammonia addition according to an embodiment of the present invention, a flue gas pretreatment mechanism 7 is installed on a flue gas inlet pipe 33. The flue gas pretreatment mechanism 7 includes a connecting ring 71, a wind guiding ring cover 72 disposed inside the flue gas inlet pipe 33, and a filter screen 73. A slag discharge pipe 76 is communicated and provided at the bottom end of the connecting ring 71. The flue gas inlet pipe 33 is arranged in a two-section structure. The wind guiding ring cover 72 and the filter screen 73 are respectively fixed inside the two sections of the flue gas inlet pipe 33. The connecting ring 71 is detachably installed between the two sections of the flue gas inlet pipe 33 through locking bolts. Among them, the axial section of the wind guiding ring cover 72 is arranged in a frustum-shaped structure, and the contracted end of the wind guiding ring cover 72 is close to the filter screen 73;

[0073] A wheel shaft is rotatably installed in a penetrating manner at the axial center line position of the filter screen 73. An impeller 74 is fixedly installed on the outer side of one end of the wheel shaft away from the wind guiding ring cover 72. Among them, two retaining rings respectively fitting on both sides of the filter screen 73 are fixedly sleeved on the outer side of the wheel shaft, which can prevent the wheel shaft from moving axially while not affecting the rotation of the impeller 74. One end of the wheel shaft close to the wind guiding ring cover 72 is threadedly connected with a cap nut, and a plurality of cleaning components 75 evenly distributed in a ring shape are fixedly arranged on the outer side of the cap nut;

[0074] The cleaning component 75 includes a wind shield 751 fixed on the outer side of the cap nut. An elastic telescopic member II 752 is fixedly installed inside the wind shield 751. One end of the elastic telescopic member II 752 is fixedly connected with a mounting strip, and a cleaning brush is detachably installed on the outer side of the mounting strip. Among them, the elastic telescopic member II 752 is composed of a cylinder with a circular groove, a round rod inserted into the circular groove, and a spring. The cylinder is fixed on the wind shield 751, and one end of the round rod extending out of the circular groove is fixedly connected with the mounting strip. Both ends of the spring are respectively connected with the round rod and the inner cavity end face of the circular groove. Among them, within the elastic limit range of the spring, one end of the round rod always remains inserted into the circular groove on the cylinder, and in this state, the cleaning side of the cleaning brush is attached to the windward side of the filter screen 73.

[0075] It should be noted that during the process of filtering the solid particulate matters mixed in the flue gas to be treated, the filter screen 73 is used to intercept the solid particulate matters mixed in the flue gas, and the flue gas passing through the filter screen 73 is used to blow the impeller 74 to rotate. The rotation of the impeller 74 will drive the cap nut threadedly installed at the end of the wheel shaft to rotate, thereby driving the cleaning component 75 installed on the outer side of the cap nut to clean the filter screen 73 in real time. Since a circular-shaped leeward area is formed between the outer side of the contracted end of the wind guiding ring cover 72 and the corresponding section of the flue gas inlet pipe 33, and in cooperation with the windless cleaning area formed between the wind shield 851 and the filter screen 73 to separate the oncoming air flow, the solid particulate matters such as dust cleaned down can smoothly fall to the inner bottom area of the connecting ring 71 and finally directly discharged along the slag discharge pipe 76, avoiding the operation of cleaning the accumulated ash irregularly, and the flue gas pretreatment mechanism 7 is convenient to disassemble, assemble and maintain.

[0076] In the above technical solution, the ultrasonic vibration plate mentioned adopts an immersion ultrasonic vibration plate with the model number AK-1024P; the flowmeter mentioned adopts a gas flowmeter with the model number SG-NZ-KD1 and a liquid flowmeter with the model number EXQ41W; the liquid level sensor 514 mentioned adopts an immersion static pressure type liquid level transmitter with the model number JYB-KO-L; the booster pump 47 mentioned adopts a Deli booster pump, and the specific model is selected according to the actual production situation; the servo motor mentioned adopts a servo driver with the model number JSDL2-10A1.

[0077] An intelligent desulfurization method for precise ammonia addition specifically includes the following operation steps:

[0078] S1. Flue gas pretreatment: During the process of sending the flue gas to be treated into the inside of the cylinder body 1 through the induced draft fan from the flue gas inlet pipe 33, a filter screen 73 with a cleaning component 75 is used to filter solid particles in the flue gas;

[0079] S2. Flue gas desulfurization: Filtered flue gas, ammonia, and water are respectively introduced into the inside of the desulfurization tank 31 through the flue gas inlet pipe 33, ammonia inlet pipe 34, and water inlet pipe 35 according to a ratio. The high-frequency vibration generated by the ultrasonic vibration plate 1 36 is used to transfer energy to the processing liquid, and it is continuously stirred in cooperation with the stirring rod at the bottom of the vertical shaft 37, so that sulfur oxides in the flue gas are fully absorbed by ammonia water;

[0080] S3. Ammonia escape absorption: A multi-layer water curtain formed by draining water through a plurality of annular channels 45 at the bottom of the water storage tray 42 is used to fully absorb the ammonia escaped in the process of S2, and a booster pump 47 is used to pump the ammonia water formed by absorbing the escaped ammonia back into the inside of the desulfurization tank 31 to continue reacting with sulfur oxides in the flue gas;

[0081] S4. Desulfurization product treatment and desulfurized flue gas treatment: ① As the process of S2 continues, ammonium sulfite generated by the reaction of ammonia water and sulfur oxides is likely to gradually overflow from the desulfurization tank 31 and be collected inside the annular cylinder 58. The high-frequency vibration generated by the ultrasonic vibration plate 2 513 is used to transfer energy to the processing liquid, and the introduced oxygen is used to oxidize ammonium sulfite into more stable ammonium sulfate, and then it is discharged and transported to the ammonium salt production station for processing;

[0082] ② The flue gas after desulfurization treatment and ammonia escape absorption treatment is transported upward to the condensation treatment station for temperature reduction treatment to reduce the generation of white smoke at the outlet position of the flue gas discharge pipe 2.

[0083] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. An intelligent desulfurization device for precise ammonia addition, comprising a cylinder body (1), and a flue gas discharge pipe (2) is fixedly installed at the outer top end of the cylinder body (1), characterized in that, In the middle of the inner side of the cylinder body (1), a desulfurization treatment mechanism (3) for removing sulfur oxides in the flue gas is provided, and on the inner side of the cylinder body (1), an ammonia escape treatment mechanism (4) located above the desulfurization treatment mechanism (3) and a desulfurization product treatment mechanism (5) located below the desulfurization treatment mechanism (3) are also provided; The desulfurization treatment mechanism (3) includes a desulfurization box (31) and a vertical shaft (37) rotatably installed on the axis of the cylinder body (1). The bottom end of the vertical shaft (37) extends into the desulfurization box (31). A first cross bar (32) is fixedly connected between the outer side of the desulfurization box (31) and the inner wall of the cylinder body (1). A support column is fixedly provided on the inner bottom end surface of the desulfurization box (31), and a first ultrasonic vibration plate (36) is fixedly installed at the top of the support column. The bottom of the desulfurization box (31) is communicated with a flue gas inlet pipe (33), an ammonia inlet pipe (34), and a water inlet pipe (35), and the ends of the flue gas inlet pipe (33), the ammonia inlet pipe (34), and the water inlet pipe (35) communicating with the desulfurization box (31) are all located directly below the first ultrasonic vibration plate (36); Control valves and flow meters are installed at the connection parts of the flue gas inlet pipe (33), the ammonia inlet pipe (34), and the water inlet pipe (35) with the desulfurization box (31). A stirring rod is fixedly provided on the outer side of the end of the vertical shaft (37) extending into the desulfurization box (31).

2. The intelligent desulfurization equipment for precise ammonia addition according to claim 1, wherein The ammonia escape treatment mechanism (4) includes a fixed annular arc cover (41) on the inner side of the cylinder body (1) and a water storage tray (42) located at the top of the annular arc cover (41). A second cross bar (49) is fixedly connected between the outer side of the water storage tray (42) and the inner wall of the cylinder body (1). An air guiding arc cover (43) sleeved on the outer side of the upper end of the annular arc cover (41) is fixedly connected to the bottom of the water storage tray (42); A plurality of groups of leaky grooves (44) evenly distributed in a ring shape are formed at the bottom of the water storage tray (42), and an annular channel (45) is fixedly provided at the position corresponding to each group of leaky grooves (44) at the bottom of the water storage tray (42). The minimum diameter of the innermost annular channel (45) is greater than the maximum diameter of the air guiding arc cover (43).

3. The intelligent desulfurization equipment for precise ammonia addition according to claim 2, characterized in that, The ammonia escape treatment mechanism (4) further includes a booster pump (47) fixedly installed on the outer side of the annular arc cover (41) and a water distribution pipe (46) for communicating the water storage tray (42) with the water inlet pipe (35). The water outlet end of the booster pump (47) is connected with a return water pipe (48). The water outlet end of the return water pipe (48) sequentially penetrates through the annular arc cover (41) and the desulfurization box (31), and extends to the bottom of the first ultrasonic vibration plate (36).

4. The intelligent desulfurization equipment for precise ammonia addition according to claim 1, characterized in that, The desulfurization product treatment mechanism (5) includes two limiting rings (55) fixedly provided on the inner side of the cylinder body (1). A support plate (56) sleeved on the outer side of the water inlet pipe (35) is slidably installed between the two limiting rings (55). A ring cylinder (58) is fixedly provided at the top of the support plate (56). A partition plate is fixedly provided in the middle of the inner side of the ring cylinder (58). Liquid level sensors (514) are installed on both sides of the partition plate. Two round pipes are fixedly penetrated through the outer side of the ring cylinder (58); An inclined elliptical plate (51) is fixedly arranged inside the cylinder body (1). A leakage hole (52) is formed through the low-position end of the elliptical plate (51). A water guide arc plate (53) is fixedly arranged at the position corresponding to the leakage hole (52) at the bottom of the elliptical plate (51). The low-position end of the water guide arc plate (53) extends to the position inside the annular cylinder (58). A ring block (57) corresponding to the circular pipe is also fixedly arranged inside the cylinder body (1). The opposite ends of the two circular pipes are respectively in contact with the inner side of the ring block (57). A liquid discharge pipe (515) fixedly penetrating through the cylinder body (1) and the ring block (57) is arranged outside the cylinder body (1). An oxygen supply pipe (516) is communicated with the liquid discharge pipe (515). Control valves II are installed on both the liquid discharge pipe (515) and the oxygen supply pipe (516).

5. The intelligent desulfurization equipment for precise ammonia addition according to claim 4, characterized in that, The desulfurized product treatment mechanism (5) further includes a driving part for driving the pallet (56) to rotate. The driving part includes a support seat (59) fixed inside the cylinder body (1) and a gear ring (511) fixed at the bottom of the pallet (56). A servo motor is fixedly installed at the top of the support seat (59). The end of the output shaft of the servo motor is fixedly connected with a gear (510) meshing with the gear ring (511).

6. The intelligent desulfurization equipment for precise ammonia addition according to claim 4, characterized in that, An elastic telescopic part I (54) is fixedly installed at the bottom of the high-position end of the elliptical plate (51). One end of the elastic telescopic part I (54) is fixedly connected with an arc cover (512). An ultrasonic vibration plate II (513) is fixedly installed inside the arc cover (512).

7. The intelligent desulfurization equipment for precise ammonia addition according to claim 1, characterized in that, A desulfurized flue gas treatment mechanism (6) is arranged at the top end inside the cylinder body (1). The desulfurized flue gas treatment mechanism (6) includes a condensation cone block (63) and a conical cover (62) fixed at the top inside the cylinder body (1). The conical cover (62) is sleeved outside the condensation cone block (63). One end of the flue gas discharge pipe (2) is communicated with the inside of the conical cover (62). The condensation cone block (63) is movably sleeved outside the vertical shaft (37). A separation ring (61) is fixedly connected between the outer bottom end of the conical cover (62) and the inner wall of the cylinder body (1). A spiral channel (64) is formed on the outside of the condensation cone block (63). A plurality of water guide rings (65) are fixedly arranged inside the conical cover (62) from top to bottom. The inner side of the water guide ring (65) is in contact with the outside of the condensation cone block (63). A plurality of through grooves (66) evenly distributed in a ring shape are formed on the outside of the water guide ring (65).

8. The intelligent desulfurization equipment for precise ammonia addition according to claim 1, characterized in that, A flue gas pretreatment mechanism (7) is installed on the flue gas inlet pipe (33). The flue gas pretreatment mechanism (7) includes a connecting ring (71), a wind guide ring cover (72) arranged inside the flue gas inlet pipe (33), and a filter screen (73). A slag discharge pipe (76) is communicated with the bottom end of the connecting ring (71). The flue gas inlet pipe (33) is of a two-section structure. The wind guide ring cover (72) and the filter screen (73) are respectively fixed inside the two sections of the flue gas inlet pipe (33). The connecting ring (71) is detachably installed between the two sections of the flue gas inlet pipe (33) through a locking bolt.

9. The intelligent desulfurization equipment for precise ammonia addition according to claim 8, characterized in that, A wheel shaft is rotatably installed in a penetrating manner at the axis position of the filter screen (73). An impeller (74) is fixedly installed on the outer side of one end of the wheel shaft away from the air guide ring cover (72). A cap nut is threadedly connected to one end of the wheel shaft close to the air guide ring cover (72). A plurality of cleaning components (75) are fixedly arranged on the outer side of the cap nut in a uniformly distributed annular manner. The cleaning component (75) includes a windproof cover (751) fixed on the outer side of the cap nut. An elastic telescopic member II (752) is fixedly installed inside the windproof cover (751). One end of the elastic telescopic member II (752) is fixedly connected to an installation strip, and a cleaning brush is detachably installed on the outer side of the installation strip.

10. An intelligent desulfurization method with precise ammonia addition uses the intelligent desulfurization equipment with precise ammonia addition described in any one of claims 1-9 to perform desulfurization treatment on flue gas, characterized in that, Specifically, it includes the following operation steps: S1. Flue gas pretreatment: During the process of sending the flue gas to be treated into the interior of the cylinder body (1) through the induced draft fan from the flue gas inlet pipe (33), the filter screen (73) with the cleaning component (75) is used to filter the solid particles in the flue gas. S2. Flue gas desulfurization: Filtered flue gas, ammonia gas, and water are respectively introduced into the interior of the desulfurization tank (31) in proportion through the flue gas inlet pipe (33), the ammonia gas inlet pipe (34), and the water inlet pipe (35). The high-frequency vibration generated by the ultrasonic vibration plate I (36) is transmitted to the treatment liquid, and the stirring rod at the bottom of the vertical shaft (37) is continuously used for stirring, so that the sulfur oxides in the flue gas are fully absorbed by the ammonia water. S3. Ammonia escape absorption: The multilayer water curtain formed by draining water through a plurality of annular channels (45) at the bottom of the water storage tray (42) is used to fully absorb the ammonia gas escaping in the process of S2, and the ammonia water formed by absorbing the escaped ammonia gas is sent back to the interior of the desulfurization tank (31) through the booster pump (47) to continue to react with the sulfur oxides in the flue gas. S4. Desulfurization product treatment and desulfurized flue gas treatment: ① As the process of S2 continues, the ammonium sulfite generated by the reaction of ammonia water and sulfur oxides is likely to gradually overflow from the desulfurization tank (31) and be collected into the interior of the annular cylinder (58). The high-frequency vibration generated by the ultrasonic vibration plate II (513) is transmitted to the treatment liquid, and the introduced oxygen is used to oxidize the ammonium sulfite into more stable ammonium sulfate, and then it is discharged and transported to the ammonium salt production station for processing. ② The flue gas after desulfurization treatment and ammonia escape absorption treatment is transported upward to the condensation treatment station for temperature reduction treatment to reduce the generation of white smoke at the outlet position of the flue gas discharge pipe (2).

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