Flue gas treatment and purification equipment

Abstract

The present application relates to the technical field of flue gas treatment, and specifically discloses a flue gas treatment and purification device, which comprises a desulfurization tower and further comprises: a desulfurization assembly arranged on one side of the desulfurization tower, which is used for inputting and discharging slurry in the desulfurization tower and performing spray desulfurization treatment on flue gas; and an aeration assembly arranged on one side of the desulfurization tower, which is used for aerating the slurry in the desulfurization tower and stirring the slurry during aeration. The flue gas is subjected to desulfurization treatment by the desulfurization assembly, the slurry is aerated by the aeration assembly, and the touch control assembly can automatically adjust the spraying amount of the desulfurization assembly and the aeration amount of the aeration assembly according to the change of the slurry density in the flue gas treatment process. The control assembly can detect the oxidation-reduction state of calcium sulfite in the slurry and adjust the aeration amount correspondingly. The adjustment assembly can automatically increase the trigger threshold range of the oxidation-reduction state of the control assembly according to the decrease of the slurry PH.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas treatment, in particular to a flue gas treatment and purification equipment. BACKGROUND

[0002] With the development of industrialization process, the development state of China's industry changes from high speed to normal, stable and green high efficiency production, the emission of pollutants such as sulfur dioxide in flue gas increases, and the comprehensive treatment of flue gas becomes the focus of enterprises. When treating and purifying flue gas, a wet desulfurization tower is used to purify and treat flue gas by wet desulfurization, mainly by absorbing sulfur dioxide in flue gas through limestone components in desulfurization slurry.

[0003] When treating flue gas by the wet desulfurization tower, flue gas is introduced from the side inlet of the desulfurization tower, and the slurry at the bottom of the desulfurization tower is transported to the spray layer by the delivery pump for spraying. The sprayed slurry absorbs sulfur dioxide in flue gas to achieve the purpose of desulfurization, and a demister is arranged above the spray layer to prevent flue gas from carrying slurry into the chimney. However, after the desulfurization slurry absorbs sulfur dioxide in flue gas, unstable calcium sulfite is generated. The calcium sulfite precipitate has strong viscosity and fine particles, and is easy to adhere to the equipment to cause fouling and blockage. Therefore, pipeline aeration is needed to provide oxidation air to convert calcium sulfite into stable calcium sulfate, which is crystallized and precipitated in the slurry to form gypsum crystals that are easy to dehydrate, thereby achieving the purpose of desulfurization. However, the aeration amount cannot be automatically adjusted according to the absorption of sulfur dioxide by the slurry, which may result in excessive or insufficient aeration. Excessive aeration may cause slurry foam overflow and increase energy consumption, and insufficient aeration may result in incomplete oxidation. Therefore, we propose a flue gas treatment and purification equipment. SUMMARY

[0004] The present application aims to provide a flue gas treatment and purification equipment to solve the problem that after the desulfurization slurry absorbs sulfur dioxide in flue gas, unstable calcium sulfite is generated. The calcium sulfite precipitate has strong viscosity and fine particles, and is easy to adhere to the equipment to cause fouling and blockage. Therefore, pipeline aeration is needed to provide oxidation air to convert calcium sulfite into stable calcium sulfate, which is crystallized and precipitated in the slurry to form gypsum crystals that are easy to dehydrate, thereby achieving the purpose of desulfurization. However, the aeration amount cannot be automatically adjusted according to the absorption of sulfur dioxide by the slurry, which may result in excessive or insufficient aeration. Excessive aeration may cause slurry foam overflow and increase energy consumption, and insufficient aeration may result in incomplete oxidation.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a flue gas treatment and purification equipment, comprising: a desulfurization tower, one side of the desulfurization tower is provided with an air inlet, and the other side of the desulfurization tower is provided with an air outlet;

[0006] Further comprising: a desulfurization assembly arranged on one side of the desulfurization tower, the desulfurization assembly being used for input and output of the slurry in the desulfurization tower and spray desulfurization treatment of the flue gas;

[0007] An aeration assembly arranged on one side of the desulfurization tower, the aeration assembly being used for aeration of the slurry in the desulfurization tower and stirring when the slurry is aerated;

[0008] A touch control assembly arranged on one side of the desulfurization tower, the touch control assembly being used for automatically adjusting the spray amount of the desulfurization assembly and the aeration amount of the aeration assembly according to the change of the slurry density in the flue gas treatment process;

[0009] A regulation assembly arranged on one side of the touch control assembly, the regulation assembly being used for detecting the oxidation-reduction state of the slurry and automatically adjusting the aeration amount of the aeration assembly when the oxidation-reduction potential value of the slurry exceeds the threshold range;

[0010] An adjustment assembly arranged on one side of the regulation assembly, the adjustment assembly being used for automatically adjusting the trigger threshold range of the oxidation-reduction state of the regulation assembly according to the change of the slurry PH.

[0011] The desulfurization assembly comprises a liquid inlet pipe fixedly connected with the desulfurization tower, a slurry pump fixedly connected with the liquid inlet pipe, a liquid outlet pipe fixedly connected with one side of the desulfurization tower, a liquid outlet pump fixedly connected with the liquid outlet pipe, three spray pipes fixedly connected with one side of the desulfurization tower, spray pumps fixedly connected with the three spray pipes, and a demister fixedly connected with the inner side of the desulfurization tower.

[0012] The aeration assembly comprises an air inlet pipe penetrating through the side wall of the desulfurization tower, the air inlet pipe being fixedly connected with the desulfurization tower, a fan fixedly connected with the air inlet pipe, an aeration pipe fixedly connected with the bottom of the desulfurization tower and fixedly connected with one side of the air inlet pipe, motors fixedly connected with the outer side of the desulfurization tower at equal intervals, stirring pieces fixedly connected with the output ends of the motors, a connecting pipe fixedly connected with one side of the air inlet pipe, an air compressor fixedly connected with the connecting pipe, a first electromagnetic valve installed on one side of the air inlet pipe, and a second electromagnetic valve installed on the connecting pipe.

[0013] The touch control assembly comprises a mounting shell fixedly connected with the desulfurization tower, a mounting piece fixedly connected with the inner side of the mounting shell, a first metal strip and a slide rod fixedly connected with the inner side of the mounting piece respectively, and a first slide plate slidingly arranged on the slide rod and slidingly arranged with the first metal strip.

[0014] The first slide plate is fixedly connected with a fixed block on the upper side, the mounting piece is fixedly connected with a first electromagnetic block on the upper side, the fixed block is fixedly connected with a first magnetic block repelling the first electromagnetic block on one side, the fixed block is fixedly connected with a first spring fixedly connected with the mounting piece on one side, a density sensor is installed in the desulfurization tower, an installation plate is fixedly connected with the inner bottom of the mounting shell on one side of the fixed block, and a first switch is installed on one side of the installation plate.

[0015] The regulating assembly comprises a second electromagnetic block fixedly connected to the inner side of the mounting shell, a moving block slidingly arranged on the inner side of the mounting shell, a first sliding groove arranged on the bottom end of the inner side of the mounting shell and matched with the moving block, the moving block slidingly arranged along the first sliding groove, a second magnetic block fixedly connected to one side of the moving block and repelling the second electromagnetic block, a second spring fixedly connected to one side of the moving block and fixedly connected to the inner side of the mounting shell, and an ORP sensor arranged on the inner side of the desulfurizing tower.

[0016] The inner side of the mounting shell is slidingly provided with a first sliding block, a second sliding block and two connecting blocks, respectively, and is provided with a second sliding groove, the first sliding block, the second sliding block and the two connecting blocks are slidingly arranged along the second sliding groove, one side of one connecting block is fixedly connected with a second metal strip, one side of the other connecting block is fixedly connected with a third metal strip, one side of the second metal strip is fixedly connected with a first connecting plate, the lower side of the first connecting plate is slidingly provided with a second connecting plate fixedly connected with the third metal strip, the upper side of the first sliding block is fixedly connected with the lower side of the first connecting plate, the upper side of the second sliding block is fixedly connected with the lower side of the second connecting plate, the two ends of the second metal strip are electrically connected with a first lead wire and a second lead wire, one side of the third metal strip is electrically connected with two third lead wires, a limiting rod is fixedly connected between the two connecting blocks, a second sliding piece is slidingly arranged on the limiting rod, the second sliding piece is slidingly arranged along the second metal strip, the third metal strip, the first connecting plate and the second connecting plate, the upper side of the second sliding piece is fixedly connected with a connecting rod fixedly connected with the moving block, and one side of the second sliding piece is electrically connected with a fourth lead wire.

[0017] One side of the second metal strip and the third metal strip is provided with a pressing plate, the lower side of the two pressing plates is provided with a connecting piece, one connecting piece is fixedly connected with the first sliding block and one connecting block, the other connecting piece is fixedly connected with the second sliding block and the other connecting block, a second switch is installed on the upper end of the connecting piece, the lower side of the two pressing plates is symmetrically fixedly connected with the extension end of the telescopic rod, the fixed end of the telescopic rod is fixedly connected with the connecting piece, and the lower side of the pressing plate is symmetrically fixedly connected with a third spring fixedly connected with the connecting piece.

[0018] The adjusting assembly comprises a third electromagnetic block fixedly connected to the inner side of the mounting shell, a sliding block slidingly arranged on the inner side of the mounting shell, a fourth spring fixedly connected to one side of the sliding block and fixedly connected to the inner side of the mounting shell, a PH sensor arranged on the inner side of the desulfurizing tower, a third magnetic block fixedly connected to one side of the sliding block and repelling the third electromagnetic block, a tooth rod piece slidingly arranged on the bottom end of the inner side of the mounting shell and fixedly connected to one side of the sliding block, a first tooth rod fixedly connected between the first sliding block and one connecting block, and a second tooth rod fixedly connected between the second sliding block and the other connecting block.

[0019] Two first gears are meshingly connected on one side of the toothed rod, middle portions of the two first gears are rotationally provided with the support fixedly connected to the inner bottom end of the mounting shell, one side of the first toothed rod is meshingly connected with the second gear fixedly connected to the one side first gear, one side of the second toothed rod is meshingly connected with the third gear fixedly connected to the other side first gear, the second gear is rotationally provided with the one side support, the third gear is rotationally provided with the other side support, the inner side of the mounting shell is fixedly connected with the connecting plate, and the one side of the connecting plate is provided with the third switch.

[0020] The present application has at least the following advantages:

[0021] When the flue gas is treated by the wet desulfurization tower, the flue gas enters the inside of the desulfurization tower from the gas inlet, and the flue gas is desulfurized and purified by the desulfurization assembly. The treated flue gas is discharged from the gas outlet. By the aeration assembly, the slurry at the bottom of the desulfurization tower can be aerated to provide oxidizing air. The unstable calcium sulfite formed after the slurry absorbs sulfur dioxide in the flue gas is converted into stable calcium sulfate by oxidation to form gypsum crystals that are easy to dehydrate, thereby realizing the desulfurization treatment of the flue gas. By the touch control assembly, the spray amount of the desulfurization assembly and the aeration amount of the aeration assembly can be automatically adjusted according to the change of the slurry density during the flue gas treatment process. When the slurry density exceeds the limit value, the increase range of the spray amount and the aeration amount is increased to ensure the absorption of sulfur dioxide in the flue gas by the slurry and the oxidation of calcium sulfite. By the regulating assembly, the oxidation-reduction state of calcium sulfite in the slurry can be detected. When the detected oxidation-reduction potential value exceeds the upper limit of the set threshold range, it means that the oxidation ability is too strong, and the aeration amount will be automatically reduced. The degree of reduction of the aeration amount can be adjusted according to how much the upper limit of the threshold range is exceeded. When the detected oxidation-reduction potential value is lower than the lower limit of the set threshold range, it means that the oxidation ability is weak and the accumulation of sulfite is excessive, and the aeration amount will be increased. The degree of increase of the aeration amount can be adjusted according to how much the lower limit of the threshold range is exceeded. With the absorption of sulfur dioxide in the flue gas by the slurry, the pH value of the slurry will decrease. By the adjusting assembly, the trigger threshold range of the oxidation-reduction state of the regulating assembly can be automatically increased according to the decrease of the pH value of the slurry, that is, the upper limit and the lower limit of the threshold range are increased, and the upper limit is increased at a lower rate than the lower limit, to ensure the adjustment of the aeration amount and prevent excessive or insufficient aeration. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic view of the present application;

[0023] Figure 2 It is another three-dimensional structural schematic view of the present application;

[0024] Figure 3 It is a partial sectional view of the desulfurization tower of the present application;

[0025] Figure 4 Structure diagram of the installation shell of the application;

[0026] Figure 5 Structure diagram of the connection of the installation part of the application;

[0027] Figure 6 Structure diagram of the connection of the second metal strip and the third metal strip of the application;

[0028] Figure 7 Structure diagram of the connection of the first connecting plate and the second connecting plate of the application;

[0029] Figure 8 Structure diagram of the connection of the pressing plate of the application;

[0030] Figure 9 Structure diagram of the adjustment assembly of the application;

[0031] Figure 10 Structure diagram of the connection of the toothed rod of the application.

[0032] In the figure: 11, desulfurization tower; 12, air inlet; 13, air outlet; 2, desulfurization assembly; 21, liquid inlet pipe; 22, slurry supply pump; 23, liquid outlet pipe; 24, liquid outlet pump; 25, spraying pipe; 26, spraying pump; 27, demister; 3, aeration assembly; 31, air inlet pipe; 32, aeration pipe; 33, fan; 34, connecting pipe; 35, air compressor; 36, first electromagnetic valve; 37, second electromagnetic valve; 38, motor; 39, stirring part; 4, touch control assembly; 41, installation shell; 42, density sensor; 43, first metal strip; 44, first sliding sheet; 45, sliding rod; 46, fixed block; 47, first spring; 48, first magnetic block; 49, first electromagnetic block; 410, mounting plate; 411, first switch; 412, installation part; 5, regulation and control assembly; 51, second electromagnetic block; 52, moving block; 53, second magnetic block; 54, second spring; 55, first sliding groove; 56, ORP sensor; 57, connecting block; 58, second metal strip; 59, third metal strip; 510, first connecting plate; 511, second connecting plate; 512, first sliding block; 513, second sliding block; 514, second sliding groove; 515, limiting rod; 516, second sliding sheet; 517, connecting rod; 518, pressing plate; 519, telescopic rod; 520, third spring; 521, connecting part; 522, second switch; 523, first wire; 524, second wire; 525, third wire; 526, fourth wire; 6, adjustment assembly; 61, third electromagnetic block; 62, sliding block; 63, third magnetic block; 64, fourth spring; 65, PH sensor; 66, first toothed rod; 67, second toothed rod; 68, toothed rod part; 69, first gear; 610, support; 611, second gear; 612, third gear; 613, connecting plate; 614, third switch. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] Embodiment one

[0035] Please refer to Figures 1 to 10 The present application provides a technical solution: a flue gas treatment and purification equipment, comprising: a desulfurization tower 11, the desulfurization tower 11 is provided with an air inlet 12 on one side, and the desulfurization tower 11 is provided with an exhaust port 13 on the other side;

[0036] Further comprising: a desulfurization assembly 2, the desulfurization assembly 2 is arranged on one side of the desulfurization tower 11, the desulfurization assembly 2 is used for input and output of slurry in the desulfurization tower 11, and spray desulfurization treatment of flue gas;

[0037] An aeration assembly 3, the aeration assembly 3 is arranged on one side of the desulfurization tower 11, the aeration assembly 3 is used for aeration of the slurry in the desulfurization tower 11, and stirring when the slurry is aerated;

[0038] A touch control assembly 4, the touch control assembly 4 is arranged on one side of the desulfurization tower 11, the touch control assembly 4 automatically adjusts the spraying amount of the desulfurization assembly 2 and the aeration amount of the aeration assembly 3 according to the change of the slurry density in the flue gas treatment process;

[0039] A control assembly 5, the control assembly 5 is arranged on one side of the touch control assembly 4, the control assembly 5 is used for detecting the oxidation-reduction state of the slurry, and automatically adjusting the aeration amount of the aeration assembly 3 when the oxidation-reduction potential value of the slurry exceeds the threshold range;

[0040] An adjusting assembly 6, the adjusting assembly 6 is arranged on one side of the control assembly 5, the adjusting assembly 6 automatically adjusts the trigger threshold range of the oxidation-reduction state of the control assembly 5 according to the change of the slurry PH.

[0041] When the flue gas is treated by the wet desulfurization tower 11, the flue gas enters the inside of the desulfurization tower 11 from the gas inlet 12, and is treated by the desulfurization assembly 2, and the treated flue gas is discharged from the gas outlet 13, and the slurry at the bottom of the desulfurization tower 11 can be aerated by the aeration assembly 3 to provide oxidizing air, so that the unstable calcium sulfite generated after the slurry absorbs the sulfur dioxide in the flue gas is converted into stable calcium sulfate by oxidation, so as to form gypsum crystals that are easy to dehydrate, thereby realizing the desulfurization treatment of the flue gas, and by the touch control assembly 4, the spraying amount of the desulfurization assembly 2 and the aeration amount of the aeration assembly 3 can be automatically adjusted according to the change of the slurry density in the flue gas treatment process, and when the slurry density exceeds the limit value, the increase range of the spraying amount and the aeration amount is increased, so as to ensure the absorption of the sulfur dioxide in the flue gas by the slurry and the oxidation of the calcium sulfite; by the regulation assembly 5, the oxidation-reduction state of the calcium sulfite in the slurry can be detected, and when the detected oxidation-reduction potential value exceeds the upper limit of the set threshold range, it means that the oxidation capacity is too strong, so the aeration amount is automatically reduced, and the reduction degree of the aeration amount can be adjusted according to how much the upper limit of the threshold range is exceeded, and when the detected oxidation-reduction potential value is lower than the lower limit of the set threshold range, it means that the oxidation capacity is weak and the sulfite accumulates, so the aeration amount is increased, and the increase degree of the aeration amount can be adjusted according to how much the lower limit of the threshold range is exceeded, and as the slurry absorbs the sulfur dioxide in the flue gas, the PH value of the slurry will decrease, and by the adjusting assembly 6, the trigger threshold range of the oxidation-reduction state of the regulation assembly 5 can be automatically increased according to the decrease of the slurry PH, that is, the upper limit and the lower limit of the threshold range are increased, and the upper limit is increased at a lower rate than the lower limit, so as to ensure the adjustment of the aeration amount and prevent excessive or insufficient aeration.

[0042] The desulfurization assembly 2 comprises a liquid inlet pipe 21 fixedly communicated with the desulfurization tower 11, a slurry pump 22 fixedly connected on the liquid inlet pipe 21, and the liquid inlet pipe 21 is communicated with a slurry pool at the end away from the desulfurization tower 11, and the slurry in the slurry pool can be delivered to the bottom of the desulfurization tower 11 by the slurry pump 22; a liquid outlet pipe 23 is fixedly communicated on one side of the desulfurization tower 11, a liquid outlet pump 24 is fixedly connected on the liquid outlet pipe 23, three spraying pipes 25 are fixedly communicated on one side of the desulfurization tower 11, a spraying pump 26 is fixedly connected on each of the three spraying pipes 25, and the spraying layers of the three spraying pipes 25 are located inside the desulfurization tower 11, and a demister 27 is fixedly connected inside the desulfurization tower 11 and located above the spraying pipes 25.

[0043] When the flue gas is desulfurized, the slurry at the bottom of the desulfurization tower 11 is delivered by the spraying pump 26 through the spraying pipes 25 and sprayed out through the spraying heads above the spraying pipes 25, and after the flue gas enters the inside of the desulfurization tower 11 through the gas inlet 12, the sprayed slurry can absorb the sulfur dioxide in the flue gas, and then the slurry falls into the slurry at the bottom of the desulfurization tower 11, and the demister 27 can prevent the flue gas from carrying the slurry out of the gas outlet 13 and into the chimney.

[0044] The aeration assembly 3 comprises an air inlet pipe 31 penetrating through the sidewall of the desulfurization tower 11, the air inlet pipe 31 is fixedly connected with the desulfurization tower 11, a fan 33 is fixedly connected on the air inlet pipe 31, a filter is installed on one side of the input end of the fan 33 to filter the pumped gas, an aeration pipe 32 fixedly connected with the bottom of the desulfurization tower 11 is fixedly communicated on one side of the air inlet pipe 31, aeration holes are uniformly arranged on the side end of the aeration pipe 32, and the aeration holes are circumferentially distributed around the diameter of the aeration pipe 32, and the aeration holes of the upper and lower adjacent two layers are cross arranged, and the inside of the aeration pipe 32 is covered with a film to allow only gas to pass through; a motor 38 is fixedly connected around the circumference of the outside of the desulfurization tower 11 at equal intervals, and a stirring piece 39 is fixedly connected to the output end of the motor 38, and the stirring piece 39 is located in the slurry on the inside of the desulfurization tower 11;

[0045] When the flue gas desulfurization treatment is performed, the oxidizing air is transported into the aeration pipe 32 through the air inlet pipe 31 by the fan 33, so as to be transported into the slurry through the inner film and the aeration holes on the side end of the aeration pipe 32, the air forms small bubbles and is released, and the rotation of the stirring piece 39 driven by the motor 38 stirs the slurry, so that the gas can be dissolved in the slurry faster through the stirring, the oxidation is promoted, the air utilization rate is increased, and the limestone component in the slurry and the sulfur dioxide in the flue gas are reacted to convert the generated calcium sulfite into stable calcium sulfate.

[0046] A connecting pipe 34 is fixedly communicated on one side of the air inlet pipe 31, an air compressor 35 is fixedly connected on the connecting pipe 34, a first electromagnetic valve 36 is installed on one side of the connecting pipe 34 away from the aeration pipe 32, and a second electromagnetic valve 37 is installed on the connecting pipe 34.

[0047] When the oxidizing air is transported into the aeration pipe 32 by the fan 33, the second electromagnetic valve 37 is in a closed state, when the set time is reached, the air compressor 35 is automatically controlled to transport compressed air into the connecting pipe 34, and the second electromagnetic valve 37 is controlled to be opened, the fan 33 and the first electromagnetic valve 36 are closed, so that the compressed air enters the aeration pipe 32 through the air inlet pipe 31 to blow the aeration pipe 32, so as to prevent the inner film of the aeration pipe 32 from being blocked through the timed blowing of the compressed air, after the blowing is completed, the air compressor 35 and the second electromagnetic valve 37 are controlled to be closed, and the fan 33 and the first electromagnetic valve 36 are controlled to be opened, and the oxidizing air continues to be transported into the slurry.

[0048] The touch assembly 4 comprises a mounting shell 41 fixedly connected with the desulfurization tower 11, a mounting piece 412 fixedly connected inside the mounting shell 41, a first metal strip 43 and a sliding rod 45 fixedly connected inside the mounting piece 412 respectively, a first sliding sheet 44 slidably arranged on the sliding rod 45 and slidably arranged with the first metal strip 43, the first sliding sheet 44 being made of conductive material, the first metal strip 43 being arranged as a variable cross-section, and the cross-section near one side of the first metal strip 43 being smaller, the first metal strip 43 being electrically connected with the fan 33 and the spray pump 26, and the first metal strip 43 being arranged in a resistance access circuit on the side of the first sliding sheet 44 near the first electromagnetic block 49;

[0049] The first sliding sheet 44 is fixedly connected with a fixed block 46 on the upper side, the mounting piece 412 is fixedly connected with the first electromagnetic block 49 on the upper side, the fixed block 46 is fixedly connected with a first magnetic block 48 repelling the first electromagnetic block 49 on one side, the fixed block 46 is fixedly connected with the first spring 47 fixedly connected with the mounting piece 412 on one side, the desulfurization tower 11 is installed with a density sensor 42, the density sensor 42 is electrically connected with the first electromagnetic block 49, the fixed block 46 is provided with a mounting plate 410 fixedly connected with the inside bottom end of the mounting shell 41 on one side, the mounting plate 410 is installed with a first switch 411 on one side, and the side of the fixed block 46 near the mounting plate 410 is arranged as an arc-shaped end face, so as to conveniently abut against the first switch 411.

[0050] Initially, under the repulsion of the first electromagnetic block 49 to the first magnetic block 48, the fixed block 46 drives the first sliding sheet 44 to move away from the first electromagnetic block 49, the first spring 47 is compressed, and the first sliding sheet 44 moves to the side of the larger cross-section of the first metal strip 43. With the absorption of the slurry to the sulfur dioxide in the flue gas, the density of the slurry rises, which hinders the diffusion rate of the oxidation air in the slurry, and reduces the limestone composition in the slurry. The density sensor 42 detects the density of the slurry, and when the density of the slurry rises, the attenuation degree of the rays emitted by the density sensor 42 is larger, the current in the circuit connected with the density sensor 42 is reduced, the repulsion of the first electromagnetic block 49 to the first magnetic block 48 is reduced, and under the elastic force of the first spring 47, the fixed block 46 drives the first sliding sheet 44 to move close to the first electromagnetic block 49, the resistance in the circuit connected with the first metal strip 43 is reduced, and the power of the fan 33 and the spray pump 26 is increased, so as to increase the aeration amount and the spraying amount, to ensure the oxidation ability of the calcium sulfite and the sufficient limestone for treating the sulfur dioxide in the flue gas during spraying, with the absorption of the slurry to the sulfur dioxide in the flue gas;

[0051] And in the preliminary adjustment, the first slide 44 on the first metal strip 43 cross section larger side, to the first electromagnetic block 49 when moving, while the first metal strip 43 cross section larger side of the unit length resistance value will be smaller, so that the first metal strip 43 resistance decreases in the smaller, in the first slide 44 on the first metal strip 43 cross section smaller side, to the first electromagnetic block 49 when moving, the first metal strip 43 cross section smaller side of the unit length resistance value will be larger, so that the first metal strip 43 resistance decreases in the larger, in turn can make the aeration and spray capacity preliminary adjustment to enhance the smaller, to compensate for the loss of oxygen mass transfer efficiency, and increase the spray capacity to enhance the gas liquid contact effect, when the pulp density reaches a certain value, can make the aeration and spray capacity to enhance the larger, to make the oxidation of air to overcome the resistance of gypsum crystallization barrier and viscosity increased dramatically, to ensure the oxidation effect, and the larger spray capacity to enhance the amplitude, to break through the resistance of gypsum crystallization barrier and viscosity increased dramatically, to ensure the absorption of sulfur dioxide in flue gas;

[0052] When the fixed block 46 close to the first electromagnetic block 49 moves, the fixed block 46 is pressed to the first switch 411, which indicates that the pulp density increases to the set value. At this time, the discharge pump 24 will be controlled to pump the slurry out of the discharge pipe 23 and deliver it to the next process for treatment, so as to dehydrate the gypsum in the slurry in the desulfurization tower 11, and supplement the slurry into the desulfurization tower 11 through the liquid inlet pipe 21 by the slurry supply pump 22.

[0053] Example two

[0054] The control assembly 5 includes a second electromagnetic block 51 fixedly connected to the inside of the mounting shell 41, a moving block 52 is slidably arranged inside the mounting shell 41, a first sliding groove 55 is arranged at the bottom end of the inside of the mounting shell 41, the moving block 52 is slidably arranged along the first sliding groove 55, a second magnetic block 53 is fixedly connected to one side of the moving block 52, the second magnetic block 53 is repulsive to the second electromagnetic block 51, a second spring 54 is fixedly connected to one side of the moving block 52, the second spring 54 is fixedly connected to the inside of the mounting shell 41, an ORP sensor 56 is installed inside the desulfurization tower 11, the ORP sensor 56 detects the oxidation reduction state of the slurry, and the ORP sensor 56 is electrically connected to the second electromagnetic block 51.

[0055] The first sliding block 512, the second sliding block 513 and the two connecting blocks 57 are slidably arranged inside the mounting shell 41, the second sliding groove 514 is arranged inside the mounting shell 41, the first sliding block 512, the second sliding block 513 and the two connecting blocks 57 are slidably arranged along the second sliding groove 514, the second metal strip 58 is fixedly connected to one side of one of the connecting blocks 57, the third metal strip 59 is fixedly connected to one side of the other connecting block 57, the second metal strip 58 and the third metal strip 59 are both arranged as variable cross sections, the cross section of the side of the second metal strip 58 and the third metal strip 59 away from each other is larger, and the unit length resistance value of the corresponding part of the second metal strip 58 is smaller than the unit length resistance value of the third metal strip 59;

[0056] The first connecting plate 510 is fixedly connected to one side of the second metal strip 58, the second connecting plate 511 fixedly connected to the third metal strip 59 is slidably arranged at the lower side of the first connecting plate 510, the first sliding block 512 is fixedly connected to the upper side of the first connecting plate 510, the second sliding block 513 is fixedly connected to the lower side of the second connecting plate 511, the first conducting wire 523 and the second conducting wire 524 are electrically connected to the two ends of the second metal strip 58, the second metal strip 58 is electrically connected to the fan 33 through the first conducting wire 523 and the second conducting wire 524, the two third conducting wires 525 are electrically connected to one side of the third metal strip 59, the third metal strip 59 is electrically connected to the fan 33 through the two third conducting wires 525, the limiting rod 515 is fixedly connected between the two connecting blocks 57, the second sliding sheet 516 is slidably arranged on the limiting rod 515, the second sliding sheet 516 is slidably arranged along the second metal strip 58, the third metal strip 59, the first connecting plate 510 and the second connecting plate 511, the connecting rod 517 fixedly connected to the moving block 52 is fixedly connected to the upper side of the second sliding sheet 516, the fourth conducting wire 526 is electrically connected to one side of the second sliding sheet 516, and the second sliding sheet 516 is electrically connected to the fan 33 through the fourth conducting wire 526.

[0057] In the oxidation process of calcium sulfite in the slurry, the ORP sensor 56 can detect the redox potential value of the calcium sulfite, and the second electromagnetic block 51 can generate a repulsive force on the second magnetic block 53, so that the moving block 52 moves away from the second electromagnetic block 51, the second spring 54 is compressed, and the movement of the moving block 52 can drive the synchronous movement of the connecting rod 517 and the second sliding sheet 516, so that the second sliding sheet 516 moves to the range of the first connecting plate 510 and the second connecting plate 511. When the redox potential value detected by the ORP sensor 56 increases, it means that the oxidation ability is strong, which indicates that the aeration is more, and vice versa, which means that the oxidation ability is weak, which means that the sulfite is accumulated more; When the redox potential value detected by the ORP sensor 56 is large, the current in the circuit connected with the ORP sensor 56 will be large, so that the repulsive force of the second electromagnetic block 51 on the second magnetic block 53 is large, so that the moving block 52, the connecting rod 517 and the second sliding sheet 516 move close to the third metal strip 59, and vice versa. Under the elastic force of the second spring 54, the moving block 52, the connecting rod 517 and the second sliding sheet 516 will move close to the second metal strip 58.

[0058] The second metal strip 58 and the third metal strip 59 are provided with a pressing plate 518 on one side, and the side close to each other of the two pressing plates 518 is provided with an inclined surface, so as to facilitate the connecting rod 517 to press the pressing plates 518 on both sides. The lower side of the two pressing plates 518 is provided with a connecting piece 521, one connecting piece 521 is fixedly connected with the first sliding block 512 and one connecting block 57, and the other connecting piece 521 is fixedly connected with the second sliding block 513 and the other connecting block 57. The upper end of the connecting piece 521 is provided with a second switch 522, and the lower side of the two pressing plates 518 is fixedly connected with the extension end of the telescopic rod 519. The fixed end of the telescopic rod 519 is fixedly connected with the connecting piece 521. The lower side of the pressing plate 518 is fixedly connected with the third spring 520 which is fixedly connected with the connecting piece 521.

[0059] When the ORP sensor 56 detects an increase in the oxidation-reduction potential value, the moving block 52 drives the connecting rod 517 and the second sliding sheet 516 to move closer to the third metal strip 59, and the connecting rod 517 moves to press against the pressing plate 518 on the side close to the third metal strip 59, which causes the pressing plate 518 on this side to move downward to press against the second switch 522 on this side, the telescopic rod 519 retracts, and the third spring 520 is compressed. At this time, the second sliding sheet 516 moves to the side of the third metal strip 59 on the side of the third wire 525, and through the pressing against the second switch 522 on this side, a third wire 525 connected circuit is controlled to be disconnected, and the fourth wire 526 connected circuit is connected, so that the third metal strip 59 is connected to the resistance in the circuit, and the control is performed through the part between the second sliding sheet 516 and the other third wire 525. When the connecting rod 517 moves to press against the pressing plate 518 on the side close to the third metal strip 59, it indicates that the upper limit of the oxidation-reduction potential value threshold has been reached. If the oxidation-reduction potential value detected by the ORP sensor 56 is too large, the connecting rod 517 will press against the pressing plate 518 on this side and drive the second sliding sheet 516 to continue to move away from the second metal strip 58, which will cause the resistance connected by the third metal strip 59 in the circuit to increase. When the ORP threshold upper limit is exceeded, the power of the fan 33 is reduced, and the aeration amount is reduced to prevent the occurrence of side reactions caused by excessive oxidants. If the second sliding sheet 516 moves to the side of the larger part of the cross section of the third metal strip 59, the resistance connected by the third metal strip 59 in the circuit will increase relatively smaller compared to the side of the smaller part of the cross section of the third metal strip 59, so that when the ORP value is larger, the aeration amount continues to decrease, and the adjustment amplitude is relatively smaller, so as to avoid the occurrence of anoxic shock caused by a sharp drop in ORP. When the oxidation-reduction potential value detected by the ORP sensor 56 decreases, the moving block 52 drives the connecting rod 517 and the second sliding sheet 516 to move closer to the second metal strip 58, and the connecting rod 517 no longer presses against the pressing plate 518 on the side close to the third metal strip 59, which indicates that the ORP value is lower than the threshold upper limit. Under the action of the elastic force of the third spring 520 on this side, the pressing plate 518 on this side moves upward to reset and no longer presses against the second switch 522 on this side, which causes the fourth wire 526 connected circuit to be disconnected, and the third wire 525 connected circuit to be connected again.

[0060] When the ORP value detected by the ORP sensor 56 decreases, the moving block 52 drives the connecting rod 517 and the second sliding sheet 516 to move close to the second metal strip 58, and the connecting rod 517 moves to press against the pressing plate 518 on the side close to the second metal strip 58, which makes the pressing plate 518 on this side move downward to press against the second switch 522 on this side. At this time, the second sliding sheet 516 moves to the side of the second metal strip 58 on the side of the second conductor 524, and through the pressing against the second switch 522 on this side, the connection circuit of the second conductor 524 is controlled to be disconnected, and the connection circuit of the fourth conductor 526 is connected, so that the second metal strip 58 is connected to the resistance in the circuit, and the resistance in the circuit is controlled through the part between the second sliding sheet 516 and the first conductor 523. When the connecting rod 517 moves to press against the pressing plate 518 on the side close to the second metal strip 58, it indicates that the lower limit of the threshold value of the ORP value is reached at this time. If the ORP value detected by the ORP sensor 56 is too small, the second sliding sheet 516 will continue to move away from the third metal strip 59, so that the resistance connected by the second metal strip 58 in the circuit is small, so as to increase the power of the fan 33 and the aeration amount when the ORP threshold value is lower, so as to restore the oxidation ability and alleviate the accumulation of reducing substances. If the second sliding sheet 516 moves to the side of the larger part of the cross section of the second metal strip 58, the resistance connected by the second metal strip 58 in the circuit will decrease relatively small compared with the side of the smaller part of the cross section of the second metal strip 58, so that when the ORP value is smaller, the aeration amount can be increased relatively small to prevent over-oxidation rebound or equipment overload. When the ORP value detected by the ORP sensor 56 increases, the connecting rod 517 and the second sliding sheet 516 move close to the third metal strip 59, and the connecting rod 517 no longer presses against the pressing plate 518 on the side close to the second metal strip 58, which indicates that the ORP value is higher than the lower limit of the threshold value, so that the pressing plate 518 on this side moves upward and no longer presses against the second switch 522 on this side, which will make the connection circuit of the fourth conductor 526 disconnected, and the connection circuit of the second conductor 524 connected again.

[0061] The unit length resistance value of the corresponding part of the second metal strip 58 is smaller than the unit length resistance value of the third metal strip 59, which can increase the oxygen reduction amplitude when the ORP value exceeds the upper limit of the threshold value, and the oxygen increase amplitude when the ORP value is lower than the lower limit of the threshold value, so that when the ORP value exceeds the upper limit of the threshold value, the side reaction can be quickly inhibited and the oxidant can be prevented from being excessive, and when the ORP value is lower than the lower limit of the threshold value, the reducing substance is accumulated, and the dissolved oxygen needs to diffuse through the slurry, so the oxygen adjustment is relatively moderate to balance the oxidation demand and the mass transfer efficiency.

[0062] The adjusting assembly 6 comprises a third electromagnetic block 61 fixedly connected to the inner side of the mounting shell 41, a sliding block 62 slidingly arranged on the inner side of the mounting shell 41, a third sliding groove arranged on the inner side of the mounting shell 41 and matched with the sliding block 62, the sliding block 62 slidingly arranged along the third sliding groove, a fourth spring 64 fixedly connected to one side of the sliding block 62 and fixedly connected to the inner side of the mounting shell 41, a PH sensor 65 arranged on the inner side of the desulfurization tower 11 and electrically connected to the third electromagnetic block 61, a third magnetic block 63 fixedly connected to one side of the sliding block 62 and repelled from the third electromagnetic block 61, a tooth rod 68 slidingly arranged on the bottom end of the inner side of the mounting shell 41 and fixedly connected to one side of the sliding block 62, a fourth sliding groove arranged on the bottom end of the inner side of the mounting shell 41 and matched with the tooth rod 68, the tooth rod 68 slidingly arranged along the fourth sliding groove, a first tooth rod 66 fixedly connected between the first sliding block 512 and one of the connecting blocks 57, and a second tooth rod 67 fixedly connected between the second sliding block 513 and the other connecting block 57.

[0063] The tooth rod 68 is meshingly connected with two first gears 69, the middle portions of the two first gears 69 are rotatably arranged with a support 610 fixedly connected to the bottom end of the inner side of the mounting shell 41, the first tooth rod 66 is meshingly connected with a second gear 611 fixedly connected to one of the first gears 69, the second tooth rod 67 is meshingly connected with a third gear 612 fixedly connected to the other first gear 69, the second gear 611 is rotatably arranged with one of the supports 610, the third gear 612 is rotatably arranged with the other support 610, the diameter of the second gear 611 is greater than that of the third gear 612, a connecting plate 613 is fixedly connected to the inner side of the mounting shell 41, a third switch 614 is arranged on one side of the connecting plate 613, and one side of the sliding block 62 close to the connecting plate 613 is arranged as an arc-shaped end face, so as to conveniently abut and press the third switch 614.

[0064] Initially, under the repulsion of the third electromagnetic block 61 to the third magnetic block 63, the sliding block 62 moves away from the third electromagnetic block 61, and the fourth spring 64 is compressed. As the slurry absorbs sulfur dioxide in the flue gas, the pH value of the slurry decreases. Through the detection of the pH sensor 65 on the pH value of the slurry, the current in the circuit connected with the pH sensor 65 increases, so that the repulsion of the third electromagnetic block 61 to the third magnetic block 63 increases, and the sliding block 62 continues to move away from the third electromagnetic block 61. The movement of the sliding block 62 drives the synchronous movement of the tooth rod 68, so that the two first gears 69 rotate, thereby driving the second gear 611 and the third gear 612 to rotate, respectively, so that the first tooth rod 66 and the second tooth rod 67 move close to the third electromagnetic block 61, and then the first sliding block 512 and the one-side connecting block 57, the one-side connecting piece 521, and the second metal strip 58, and the second sliding block 513 and the other-side connecting block 57, the other-side connecting piece 521, and the third metal strip 59 move close to the third electromagnetic block 61, so as to increase the upper limit and the lower limit of the ORP threshold range, adapt to the decrease of the pH value to make the hydrogen ion participate in the oxidation-reduction reaction to change the potential lifting, and then improve the accuracy of the oxidation-reduction state indication;

[0065] The setting that the diameter of the second gear 611 is greater than the diameter of the third gear 612 can make the distance of the first tooth rod 66 moving close to the third electromagnetic block 61 relatively large, and the distance of the second tooth rod 67 moving relatively small, so as to make the distance of the first sliding block 512 and the one-side connecting block 57, the one-side connecting piece 521, and the second metal strip 58 moving relatively large, and the distance of the second sliding block 513 and the other-side connecting block 57, the other-side connecting piece 521, and the third metal strip 59 moving relatively small, that is, the lower limit of the ORP threshold range is relatively large, so as to prevent the accumulation of reducing substances and strengthen the oxidation signal triggering, and the upper limit of the ORP threshold range is relatively small, so as to inhibit the excessive oxidation side reaction and balance the oxidation efficiency and the crystal quality;

[0066] As the pH of the slurry decreases, when the sliding block 62 moves away from the third electromagnetic block 61 to press the third switch 614, the drainage pump 24 is also controlled to draw the slurry out through the drainage pipe 23 for dewatering treatment, and the slurry is supplemented through the slurry supply pump 22 through the liquid inlet pipe 21, so as to maintain the pH range of the slurry and ensure the desulfurization effect of the slurry on the flue gas.

[0067] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0068] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas treatment and purification device, comprising: A desulfurization tower, wherein an air inlet is provided on one side of the desulfurization tower and an exhaust outlet is provided on the other side of the desulfurization tower; Its features include: a desulfurization component, which is disposed on one side of the desulfurization tower and is used for the input and discharge of slurry in the desulfurization tower, as well as for spray desulfurization treatment of flue gas; An aeration component is provided on one side of the desulfurization tower. The aeration component is used to aerate the slurry in the desulfurization tower and to stir the slurry during aeration. A touch control component is installed on one side of the desulfurization tower. The touch control component automatically adjusts the spray volume of the desulfurization component and the aeration volume of the aeration component according to the change in slurry density during the flue gas treatment process. A control component is disposed on one side of the touch component. The control component is used to detect the redox state of the slurry and automatically adjust the aeration rate of the aeration component when the redox potential value of the slurry exceeds the threshold range. An adjustment component is disposed on one side of a control component, and the adjustment component automatically adjusts the redox state trigger threshold range of the control component according to the change in slurry pH. The desulfurization assembly includes an inlet pipe fixedly connected to the desulfurization tower, a slurry pump fixedly connected to the inlet pipe, a drain pipe fixedly connected to one side of the desulfurization tower, a drain pump fixedly connected to the drain pipe, three spray pipes fixedly connected to one side of the desulfurization tower, each of the three spray pipes fixedly connected to a spray pump, and a demister fixedly connected to the inside of the desulfurization tower. The aeration assembly includes an air inlet pipe that penetrates the side wall of the desulfurization tower. The air inlet pipe is fixedly connected to the desulfurization tower. A blower is fixedly connected to the air inlet pipe. An aeration pipe that is fixedly connected to the bottom of the desulfurization tower is fixedly connected to one side of the air inlet pipe. A motor is fixedly connected to the outside of the desulfurization tower at equal intervals around its circumference. An agitator is fixedly connected to the output end of the motor. A connecting pipe is fixedly connected to one side of the air inlet pipe. An air compressor is fixedly connected to the connecting pipe. A first solenoid valve is installed on one side of the air inlet pipe located on the connecting pipe. A second solenoid valve is installed on the connecting pipe. The touch control component includes a mounting shell fixedly connected to the desulfurization tower. A mounting component is fixedly connected to the inner side of the mounting shell. A first electromagnetic block is fixedly connected to the upper side of the mounting component. A first metal strip and a sliding rod are fixedly connected to the inner side of the mounting component. A first sliding piece is slidably disposed on the sliding rod and slidably disposed with the first metal strip. The first sliding piece is made of conductive material. The first metal strip is configured with a variable cross-section, and the cross-section on the side closer to the first electromagnetic block is smaller. The first metal strip is electrically connected to the fan and the spray pump. The first metal strip is located in the resistor connected to the circuit on the side of the first sliding piece closer to the first electromagnetic block. A fixing block is fixedly connected to the upper side of the first sliding plate. A first magnetic block that repels the first electromagnetic block is fixedly connected to one side of the fixing block. A first spring that is fixedly connected to the mounting component is fixedly connected to one side of the fixing block. A density sensor is installed inside the desulfurization tower. The density sensor is electrically connected to the first electromagnetic block. A mounting plate that is fixedly connected to the bottom of the inner side of the mounting shell is provided on one side of the fixing block. A first switch is installed on one side of the mounting plate. The side of the fixing block near the mounting plate is set with an arc-shaped end face to facilitate the pressure on the first switch.

2. The flue gas treatment and purification equipment according to claim 1, characterized in that: The control component includes a second electromagnetic block fixedly connected to the inner side of the mounting shell, a movable block slidably disposed on the inner side of the mounting shell, a first sliding groove adapted to the movable block provided at the bottom end of the inner side of the mounting shell, the movable block slidably disposed along the first sliding groove, a second magnetic block repelling the second electromagnetic block fixedly connected to one side of the movable block, a second spring fixedly connected to the inner side of the mounting shell fixedly connected to one side of the movable block, and an ORP sensor installed inside the desulfurization tower.

3. The flue gas treatment and purification equipment according to claim 2, characterized in that: The mounting housing has a first slider, a second slider, and two connecting blocks slidably disposed on its inner side. A second sliding groove is provided on the inner side of the mounting housing. The first slider, the second slider, and the two connecting blocks all slide along the second sliding groove. A second metal strip is fixedly connected to one side of one connecting block, and a third metal strip is fixedly connected to one side of the other connecting block. A first connecting plate is fixedly connected to one side of the second metal strip. A second connecting plate, fixedly connected to the third metal strip, is slidably disposed below the first connecting plate. The upper side of the first slider is fixedly connected to the lower side of the first connecting plate, and the upper side of the second slider is fixedly connected to the lower side of the second connecting plate. A first wire and a second wire are electrically connected to both ends of the second metal strip, respectively. Two third wires are electrically connected to one side of the third metal strip. A limit rod is fixedly connected between the two connecting blocks. A second sliding piece is slidably disposed on the limit rod. The second sliding piece slides along the second metal strip, the third metal strip, the first connecting plate, and the second connecting plate. A connecting rod fixedly connected to a moving block is fixedly connected to the upper side of the second sliding piece. A fourth wire is electrically connected to one side of the second sliding piece.

4. The flue gas treatment and purification equipment according to claim 3, characterized in that: A pressure plate is provided on one side of both the second and third metal strips. A connector is provided on the lower side of both pressure plates. One connector is fixedly connected to the first slider and a connecting block, and the other connector is fixedly connected to the second slider and another connecting block. A second switch is installed on the upper end of the connector. The telescopic ends of telescopic rods are symmetrically fixedly connected to the lower side of both pressure plates. The fixed ends of the telescopic rods are fixedly connected to the connectors. A third spring is symmetrically fixedly connected to the lower side of the pressure plates and is fixedly connected to the connector.

5. The flue gas treatment and purification equipment according to claim 3, characterized in that: The adjustment assembly includes a third electromagnetic block fixedly connected to the inside of the mounting shell, a sliding block slidably disposed on the inside of the mounting shell, a fourth spring fixedly connected to one side of the sliding block and fixedly connected to the inside of the mounting shell, a pH sensor installed inside the desulfurization tower, a third magnetic block repelling the third electromagnetic block fixedly connected to one side of the sliding block, a toothed rod fixedly connected to one side of the sliding block and slidably disposed at the bottom of the inside of the mounting shell, a first toothed rod fixedly connected between the first slider and a connecting block, and a second toothed rod fixedly connected between the second slider and another connecting block.

6. The flue gas treatment and purification equipment according to claim 5, characterized in that: Two first gears are meshed on one side of the gear rod. Each of the two first gears has a support column fixedly connected to the bottom of the inner side of the mounting housing. A second gear fixedly connected to one side of the first gear is meshed on one side of the first gear. A third gear fixedly connected to the other side of the first gear is meshed on one side of the second gear. The second gear is rotatably connected to one side of the support column, and the third gear is rotatably connected to the other side of the support column. A connecting plate is fixedly connected to the inner side of the mounting housing, and a third switch is installed on one side of the connecting plate.

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