Flue gas deamination system

Abstract

The invention discloses a flue gas deamination system which comprises a flue gas treatment tower, a core processor, a spraying assembly and a demisting assembly are sequentially arranged in the flue gas treatment tower from bottom to top, a flue gas outlet is formed in the upper end of the flue gas treatment tower, a flue gas inlet is formed in the flue gas treatment tower, and a liquid storage area is arranged on the lower portion of the flue gas treatment tower; the flue gas and an absorbent sprayed by the spraying assembly are converged in the core processor, and the flue gas is subjected to deamination; the absorbent circulating subsystem is used for circularly conveying the absorbent in the liquid storage area to the spraying assembly; the agent conveying subsystem is used for conveying the treatment agent to the liquid storage area; the waste liquid treatment subsystem is used for recycling waste liquid; and the oxygen input subsystem is used for inputting high-valence oxygen into the flue gas treatment tower. According to the invention, the problems that the deamination and desulfurization treatment process in the flue gas is relatively complex and often needs to be carried out for multiple times, the treatment efficiency is relatively low, and subsequent treatment of waste liquid and recycling of beneficial substances are lacked in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of ammonia-containing flue gas treatment, and more particularly, to a flue gas deammoniation system. Background Art

[0002] In production environments such as cement plants and power plants, flue gas needs to be treated, and the treatment process includes, but is not limited to, desulfurization, deammoniation, and carbon dioxide capture of the flue gas. However, in related technologies, the processes of deammoniation and desulfurization of flue gas are relatively complex, often requiring multiple steps, and there is a lack of subsequent treatment of waste liquid and recycling of beneficial substances. Summary of the Invention

[0003] The main object of the present invention is to provide a flue gas deammoniation system to solve the problems in related technologies that the processes of deammoniation and desulfurization of flue gas are relatively complex, often requiring multiple steps, with low treatment efficiency, and a lack of subsequent treatment of waste liquid and recycling of beneficial substances.

[0004] To achieve the above object, the present invention provides a flue gas deammoniation system, including:

[0005] A flue gas treatment tower, in which a core processor, a spraying assembly, and a demisting assembly are sequentially arranged from bottom to top. A flue gas outlet is provided at the upper end of the flue gas treatment tower, a flue gas inlet is provided on the flue gas treatment tower, and a liquid storage area is provided at the lower part of the flue gas treatment tower;

[0006] The flue gas inlet is located between the core processor and the liquid storage area. Under the action of the spraying assembly, multiple water films can be formed in the core processor. The flue gas converges with the absorbent sprayed by the spraying assembly in the core processor and is deammoniated while passing through the water films;

[0007] An absorbent circulation subsystem, the first end of which is communicated with the liquid storage area, and the second end is communicated with the spraying assembly, for circulating and transporting the absorbent in the liquid storage area to the spraying assembly for downward spraying by the spraying assembly;

[0008] A chemical agent delivery subsystem, which is communicated with the liquid storage area for delivering treatment chemicals to the liquid storage area;

[0009] A waste liquid treatment subsystem, which is communicated with the liquid storage area for recycling and treating waste liquid;

[0010] An oxygen input subsystem, which is used to input oxygen into the flue gas treatment tower to promote the oxidation reaction of substances containing sulfur in a lower valence state in the flue gas treatment tower.

[0011] Further, the core processor includes:

[0012] A support structure which is arranged to allow the solution to flow through and is fixedly connected to the flue gas treatment tower;

[0013] Treatment plates, a plurality of which are provided and arranged axially on the support structure with a spacing between adjacent treatment plates;

[0014] A plurality of through holes are provided on the treatment plates, and the aperture and density of the through holes satisfy that the sum of the solution flow rates allowed to pass through the plurality of through holes per unit time is less than the solution flow rate flowing to the treatment plate where the through holes are located per unit time, so that a water film with a certain thickness can be formed on the upper surface of the treatment plate during the flue gas treatment process.

[0015] Further, the waste liquid treatment subsystem includes:

[0016] A water treatment module which is used to receive the waste liquid discharged from the liquid storage area and purify the waste liquid, and the treated purified water returns to the flue gas treatment tower, and the treated concentrated salt water is transported to the next level;

[0017] A buffer tank which is connected to the water treatment module and is used to receive the treated concentrated salt water and transport the concentrated salt water to the next level respectively;

[0018] A decomposition furnace which is connected to the buffer tank and is used to receive part of the concentrated salt water in the buffer tank and recycle it;

[0019] A grate cooler which is connected to the buffer tank and is used to receive part of the concentrated salt water in the buffer tank and recycle it.

[0020] Further, the oxygen input subsystem includes an oxidation blower. An oxygen inlet is provided on the flue gas treatment tower, and the oxygen inlet is located below the flue gas inlet. The oxidation blower is connected to the oxygen inlet and is used to input oxygen from the oxygen inlet into the flue gas treatment tower to promote the chemical reaction of sulfur-containing substances in the flue gas treatment tower.

[0021] Further, it further includes an absorption zone sump subsystem which is connected to the liquid storage area and is used to pump out the absorbent after participating in the flue gas treatment from the liquid storage area and transport the pumped absorbent back to the liquid storage area, and detect the absorbent after participating in the flue gas treatment through the absorption zone sump subsystem.

[0022] Further, it further includes an absorbent buffer system which is used to buffer the absorbent in the liquid storage area during maintenance and transport the buffered absorbent back to the liquid storage area.

[0023] Further, the medicament delivery subsystem includes:

[0024] An alkaline medicament delivery component for inputting an alkaline medicament into the liquid storage area;

[0025] An acidic medicament delivery component for inputting an acidic medicament into the liquid storage area.

[0026] Further, the spraying component includes a first spray head, a second spray head, and a third spray head arranged in sequence from top to bottom. The spraying ranges of the first spray head, the second spray head, and the third spray head intersect and jointly cover the central processing unit;

[0027] The absorbent circulation subsystem includes a first circulation pump, a second circulation pump, and a third circulation pump. Two ends of the first circulation pump are respectively connected to the liquid storage area and the first spray head. Two ends of the second circulation pump are respectively connected to the liquid storage area and the second spray head. Two ends of the third circulation pump are respectively connected to the liquid storage area and the third spray head.

[0028] Further, a smoke collection subsystem is further included. The smoke collection subsystem is arranged at the upper part of the flue gas treatment tower and is communicated with the flue gas outlet. The smoke collection subsystem is used for collecting the gas containing droplets after the flue gas treatment and performing gas-liquid separation on the gas containing droplets. The separated gas is discharged from the flue gas outlet.

[0029] Further, the smoke collection subsystem includes a smoke collection hood and an exhaust pipe. The smoke collection hood is arranged in a conical shape. A first ventilation port is arranged on the smoke collection hood. The first ventilation port is connected to the exhaust pipe. The exhaust pipe is communicated with the flue gas outlet;

[0030] A second ventilation port is arranged on the smoke collection hood. A third ventilation port is arranged on the exhaust pipe. The second ventilation port and the third ventilation port are communicated through a pipeline. The orientation of the third ventilation port deviates from the axis of the exhaust pipe, so that the gas discharged from the third ventilation port enters the exhaust pipe from the tangential direction of the exhaust pipe, and the gas in the exhaust pipe rises in a cyclone manner and undergoes gas-liquid separation.

[0031] In the process of flue gas denitrification treatment of the present invention, the flue gas is introduced from the flue gas inlet at the lower part of the flue gas treatment tower. The chemical agent delivery subsystem introduces the treatment chemical agent capable of absorbing ammonia in the flue gas into the liquid storage area at the lower part of the flue gas treatment tower. The treatment chemical agent and the aqueous solution are mixed in the liquid storage area to form an absorbent, and the absorbent circulation subsystem transports the absorbent in the liquid storage area to the spray assembly. The absorbent is sprayed downward onto the core processor through the spray assembly, causing the core processor to form multiple water films. The flue gas entering the flue gas treatment tower flows from bottom to top and converges with the sprayed absorbent at the core processor. When the flue gas passes through the multiple water films, most or all of the ammonia in the flue gas is washed away. The flue gas passing through the core processor continues to flow upward and continuously contacts the absorbent sprayed downward, further absorbing and treating the residual ammonia in the flue gas. The treated flue gas mixed with liquid droplets flows upward to the demisting assembly. When passing through the demisting assembly, the demisting assembly adsorbs the liquid droplets mixed in the flue gas for gas-liquid separation. The separated flue gas is discharged from the flue gas outlet at the upper part of the flue gas treatment tower, and the separated liquid droplets flow downward to the liquid storage area. During the treatment process, the oxygen input subsystem inputs oxygen into the flue gas treatment tower to promote the oxidation reaction of substances containing sulfur in sub-valent state in the flue gas treatment tower. For example, sulfur dioxide is converted into sulfur trioxide, which dissolves in water to form sulfuric acid. After reacting with calcium, calcium sulfate can be directly formed as an industrial product. The waste liquid formed after flue gas treatment is transported out through the waste liquid treatment subsystem and the waste liquid is recycled. The beneficial substances in the waste liquid are extracted and the content of harmful substances in the waste liquid is reduced.

[0032] Through this flue gas denitrification system, the present invention can fully treat the ammonia in the flue gas in one treatment process, improve the flue gas treatment efficiency and reduce the complexity of flue gas treatment. Moreover, during the treatment process, it can promote the oxidation reaction of substances containing sulfur in sub-valent state in the tower, which is beneficial for subsequent recycling. At the same time, the formed waste liquid can be recycled again, making full use of various beneficial substances and improving the economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings forming a part of the present invention are used to provide a further understanding of the present invention, making other features, objectives and advantages of the present invention more obvious. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0034] Figure 1 is a schematic diagram of the flue gas treatment system in the embodiment of the present invention;

[0035] Figure 2 is a schematic diagram of the structure of the processor in the embodiment of the present invention;

[0036] Figure 3 is a schematic diagram of the structure of a single processing unit in the embodiment of the present invention;

[0037] Figure 4 is a schematic structural view of the support structure in an embodiment of the present invention;

[0038] Figure 5 is a schematic structural view of two layers of processing plates in an embodiment of the present invention;

[0039] Figure 6 is a top - view structural schematic diagram of a processing plate in an embodiment of the present invention;

[0040] Figure 7 is Figure 5 a schematic structural view of a quarter of the processing plate;

[0041] Figure 8 is a schematic structural view of a rectangular plate in an embodiment of the present invention;

[0042] Figure 9 is a schematic structural view of a smoke - collecting subsystem in an embodiment of the present invention;

[0043] Wherein, 1, processing unit; 2, support structure; 201, arc - shaped support plate; 202, support beam; 203, diagonal brace; 3, processing plate; 30, through - hole; 31, plate; 310, special - shaped plate; 311, rectangular plate; 4, partition board; 40, cross - plate; 41, longitudinal plate; 5, chamber; 6, flue - gas treatment tower; 601, oxygen inlet; 602, flue - gas inlet; 603, flue - gas outlet; 7, core processor; 8, spraying assembly; 801, first spray head; 802, second spray head; 803, third spray head; 9, demisting assembly; 10, liquid storage area; 11, absorbent circulation subsystem; 110, first circulation pump; 111, second circulation pump; 112, third circulation pump; 12, oxygen input subsystem; 120, oxidation blower; 13, dust collector; 14, tail - exhaust fan; 15, waste - liquid treatment subsystem; 150, water treatment module; 151, buffer tank; 152, grate cooler; 153, decomposition furnace; 16, absorption area pit subsystem; 17, absorbent buffer system; 18, chemical agent delivery subsystem; 180, alkaline chemical agent delivery assembly; 181, acidic chemical agent delivery assembly; 19, smoke - collecting subsystem; 190, smoke - collecting hood; 191, second ventilation port; 192, third ventilation port; 193, exhaust pipe; 194, first ventilation port. Detailed implementation manners

[0044] To solve related technical problems, as Figure 2 shown, an embodiment of the present invention provides a flue - gas de - ammonia system, including:

[0045] Flue gas treatment tower 6, inside which a core processor 7, a spraying assembly 8 and a demisting assembly 9 are sequentially arranged from bottom to top. At the upper end of the flue gas treatment tower 6, there is a flue gas outlet 603. On the flue gas treatment tower 6, there is a flue gas inlet 602. At the lower part of the flue gas treatment tower 6, there is a liquid storage area 10;

[0046] The flue gas inlet 602 is located between the core processor 7 and the liquid storage area 10. Under the action of the spraying assembly, multiple water films can be formed inside the core processor. The flue gas and the absorbent sprayed by the spraying assembly 8 converge in the core processor 7, and the ammonia in the flue gas is removed during the process of passing through the water films;

[0047] Absorbent circulation subsystem 11, the first end of the absorbent circulation subsystem 11 is communicated with the liquid storage area 10, and the second end is communicated with the spraying assembly 8, which is used to circulate and transport the absorbent in the liquid storage area 10 to the spraying assembly 8 for downward spraying by the spraying assembly 8;

[0048] Agent delivery subsystem 18, the agent delivery subsystem 18 is communicated with the liquid storage area 10, which is used to deliver the treatment agent to the liquid storage area 10;

[0049] Waste liquid treatment subsystem 15, the waste liquid treatment subsystem 15 is communicated with the liquid storage area 10, which is used to recycle and treat the waste liquid;

[0050] Oxygen input subsystem 12, the oxygen input subsystem 12 is used to input oxygen into the flue gas treatment tower 6 to promote the oxidation reaction of substances containing sulfur in the lower valence state in the flue gas treatment tower 6.

[0051] In this embodiment, this flue gas treatment system is used to treat the tail gas of a cement kiln, mainly for ammonia removal from the tail gas of the cement kiln. The flue gas treatment process includes: the flue gas is introduced into the flue gas treatment tower 6 from the flue gas inlet 602 at the lower part. The agent delivery subsystem 18 introduces the treatment agent that can absorb ammonia in the flue gas into the liquid storage area 10 at the lower part of the flue gas treatment tower 6. The treatment agent and the aqueous solution are mixed in the liquid storage area 10 to form an absorbent, and the absorbent circulation subsystem 11 transports the absorbent in the liquid storage area 10 to the spraying assembly 8, and sprays it downward to the core processor 7 through the spraying assembly 8, and multiple water films are formed in the core processor 7. The flue gas entering the flue gas treatment tower 6 flows from bottom to top and converges with the sprayed absorbent in the core processor 7, and most of the substances to be treated in the flue gas, such as ammonia and sulfur, are washed off during the process of passing through the water films. The flue gas passing through the core processor 7 continues to flow upward and continuously contacts the absorbent sprayed downward, further absorbing and treating the remaining substances to be treated in the flue gas; the treated flue gas mixed with liquid droplets flows upward to the demisting assembly 9. When passing through the demisting assembly 9, the demisting assembly 9 adsorbs the liquid droplets mixed in the flue gas for gas-liquid separation. The separated flue gas is discharged from the flue gas outlet 603 at the upper part of the flue gas treatment tower 6, and the separated liquid droplets flow downward to the liquid storage area 10.

[0052] During the treatment process, the oxygen input subsystem 12 inputs oxygen into the flue gas treatment tower 6 to promote the oxidation reaction of sub-valent sulfur substances in the flue gas treatment tower 6. For example, sulfur dioxide is converted into sulfur trioxide, which dissolves in water to form sulfuric acid. After reacting with calcium in the subsequent process, calcium sulfate can be directly formed as an industrial product. The waste liquid formed after flue gas treatment is transported outwards through the waste liquid treatment subsystem 15 and the waste liquid is recycled to extract the beneficial substances in the waste liquid and reduce the content of harmful substances in the waste liquid.

[0053] Specifically, in this embodiment, the internal structure of the flue gas treatment tower 6 includes a core processor 7, a spray component 8, and a demisting component 9 arranged in sequence from bottom to top. Among them, the core processor 7 is the area where the flue gas and the absorbent converge. The flue gas is fully treated and absorbed in the core processor 7, and most or all of the substances to be treated in the flue gas are washed away by the absorbent, including ammonia, sulfur, nitrogen, solid impurities in the flue gas, and so on. The absorbent sprayed from the spray component 8 washes away the substances to be treated in the flue gas after passing through the core processor 7 and flows downward into the liquid storage area 10.

[0054] The core processor 7 may include a processing plate with a hole structure. The absorbent flowing downward can flow through the hole structure and form a water film on the processing plate at the same time. The flue gas can pass through the water film and flow upward. During the process of passing through the water film, the absorbent treats the flue gas. The formation and thickness of the water film can be controlled by controlling the liquid spraying amount of the spray component 8. Theoretically, when the liquid spraying amount exceeds the flow rate of the hole structure, a water film can be formed. The larger the liquid spraying amount, the thicker the water film, and the greater the resistance of the thicker water film to the flue gas. Therefore, an appropriate liquid spraying amount can be selected to form an appropriate thickness of the water film, which can not only fully treat the flue gas but also ensure that the flue gas still has a certain speed after treatment to improve the flue gas treatment efficiency.

[0055] The flue gas passing through the core processor 7 and the spray component 8 contains some liquid droplets. The liquid droplets contain the absorbent and some substances dissolved in the absorbent. Therefore, it is necessary to remove the liquid droplets in the flue gas before the flue gas is discharged. In this embodiment, the demisting component 9 located above the spray component 8 is used to remove the liquid droplets in the flue gas. Since the flue gas entering the flue gas treatment tower 6 has a certain initial speed, it still maintains a certain speed and flows upward even after being treated in contact with the absorbent. The flue gas with a certain speed carries the liquid droplets and flows upward to contact the demisting component 9. The flow direction of the flue gas is changed by the blocking member in the demisting component 9. Since the flue gas, as a gas, can change its direction and continue to flow upward after being blocked, while the liquid droplets in the flue gas will be adsorbed on the blocking member and drip and flow downward after being collected. In one embodiment, the demisting component 9 includes a plurality of baffle plates, and the resistance during the flow of the flue gas is increased through the baffle plates to remove the liquid droplets in the flue gas.

[0056] As shown Figure 2 in FIG. 1, an absorbent circulation subsystem 11, a chemical agent delivery subsystem 18, a waste liquid treatment subsystem 15, and an oxygen input subsystem 12 are connected to a flue gas treatment tower 6 as external systems. Among them, the absorbent circulation subsystem 11 is used to continuously transport the absorbent in the liquid storage area 10 to the spray assembly 8, and the absorbent sprayed by the spray assembly 8 flows back to the liquid storage area 10 after treating the flue gas. In one embodiment, the absorbent circulation subsystem 11 mainly includes one or more circulation pumps.

[0057] The chemical agent delivery subsystem 18 is used to deliver the treatment chemical agent to the liquid storage area 10 of the flue gas treatment tower 6, and the treatment chemical agent forms an absorbent by mixing with the aqueous solution in the liquid storage area 10. According to different treatment requirements, the chemical agent delivery subsystem 18 delivers different types of treatment chemical agents into the liquid storage area 10. The aqueous solution in the liquid storage area 10 can be directly input through a water tank and a water pump.

[0058] Since the absorbent after treating the flue gas still flows back to the liquid storage area 10, after a period of treatment, a large amount of waste liquid will be stored in the liquid storage area 10. Therefore, it is necessary to treat the waste liquid. In this embodiment, the waste liquid treatment subsystem 15 pumps out and treats the waste liquid in the liquid storage area 10, and utilizes the beneficial substances in the waste liquid. The specific treatment method can be determined by analyzing the components of the waste liquid.

[0059] The oxygen input subsystem 12 is used to input oxygen into the flue gas treatment tower 6 to promote the treatment of the flue gas and the subsequent recovery treatment of the waste liquid, reduce the complexity in the subsequent treatment process, and improve the economic value.

[0060] Through the flue gas denitrification system of the present invention, ammonia in the flue gas can be fully treated in a single treatment process, the flue gas treatment efficiency can be improved, and the complexity of the flue gas treatment can be reduced. Moreover, during the treatment process, the oxidation reaction of sulfur substances with sub-valent states in the tower can be promoted to facilitate subsequent recovery. At the same time, the formed waste liquid can be recycled and treated again, various beneficial substances can be fully utilized, and the economic value can be improved.

[0061] To further improve the treatment efficiency, as Figure 2 shown in FIG. 2, the flue gas can first pass through a dust collector 13, then through an exhaust fan 14, and then enter the flue gas treatment tower 6. The dust collector 13 removes dust from the flue gas to reduce the content of solid substances in the flue gas, and the exhaust fan 14 accelerates the flue gas to increase the flow rate of the flue gas in the flue gas treatment tower 6.

[0062] In addition, when the flue gas temperature is relatively high, to ensure the treatment effect, it is necessary to reduce the flue gas temperature before the flue gas comes into contact with the absorbent. Therefore, a cooling device can be arranged in the flue gas treatment tower 6 to cool the flue gas entering from the flue gas inlet 602 first through the cooling device, and then the cooled flue gas flows upward to contact the absorbent. In one embodiment, the cooling device can be a cooling water spraying device arranged in the flue gas treatment tower 6 and corresponding to the flue gas inlet 602, and cooling water is sprayed to the flue gas inlet 602 through the cooling water spraying device to cool the flue gas.

[0063] Furthermore, to improve the treatment effect of the flue gas in the core processor 7, as Figures 2 to 8 shown, in this embodiment, the core processor 7 includes:

[0064] A support structure 2, the support structure 2 is arranged to allow the solution to flow through, and the support structure 2 is fixedly connected to the flue gas treatment tower 6;

[0065] Treatment plates 3, a plurality of treatment plates 3 are arranged axially on the support structure 2, and there is a spacing between adjacent treatment plates 3;

[0066] A plurality of through holes 30 are arranged on the treatment plate 3, and the aperture and density of the through holes 30 satisfy that the sum of the solution flow rates allowed to pass through the plurality of through holes 30 in a unit time under a non-pressure state is less than the solution flow rate flowing to the treatment plate 3 where the through holes 30 are located in a unit time, so that during the flue gas treatment process, a water film with a certain thickness can be formed on the upper surface of the treatment plate 3.

[0067] The core processor is the core flue gas treatment part in the flue gas treatment tower. In this embodiment, the processor includes a support structure 2 and treatment plates 3. The support structure 2 is used to install and support the treatment plates 3, and at the same time, the support structure 2 can be installed and fixed in the flue gas treatment tower. Since the solution needs to flow through the processor, the support structure 2 should be able to allow the solution to pass through while meeting the support performance. In one embodiment, the support structure 2 can adopt a framework structure composed of multiple beams welded or spliced together. In this embodiment, a plurality of treatment plates 3 are arranged axially on the support structure 2. In other words, the plurality of treatment plates 3 are arranged sequentially from top to bottom or from bottom to top on the support structure 2. A plurality of through holes 30 are opened on the treatment plate 3, and the plurality of through holes 30 are designed and distributed on the treatment plate 3 according to a certain density, and the through holes 30 can allow the solution and the flue gas to pass through.

[0068] Such as Figure 5As shown in the figure, taking the case where the treatment plate 3 is set to two as an example, the solution sprayed by the spraying assembly first flows onto the upper treatment plate 3, then flows downward through the through holes 30 on the treatment plate 3 to the lower treatment plate 3, and finally flows through the through holes 30 of the treatment plate 3 to the lower part of the flue gas treatment tower. The flue gas, on the contrary, first passes through the through holes 30 on the lower treatment plate 3 and then through the through holes 30 on the upper treatment plate 3. Therefore, in order to increase the reaction time between the flue gas and the solution in the processor, it is expected in this embodiment that a water film of a certain thickness can be formed on the upper surfaces of the two treatment plates 3. After passing through the through holes 30 on the treatment plate 3, the flue gas needs to continue to pass through the water film on the treatment plate 3, and during the process of passing through the water film, it can fully contact the solution, increasing the residence time and reaction degree of the flue gas.

[0069] In order to form a water film on the treatment plate 3, the aperture of the through holes 30 in this embodiment should satisfy that the sum of the solution flow rates allowed to pass through the multiple through holes 30 per unit time is less than the solution flow rate flowing to the treatment plate 3 where the through holes 30 are located per unit time. Specifically, the density and aperture of the through holes 30 on a single treatment plate 3 determine the solution flow rate passing through the treatment plate 3 per unit time. In order to form a water film on the upper surface of the treatment plate 3, the solution flow rate flowing to the treatment plate 3 per unit time needs to be greater than the solution flow rate flowing through the treatment plate 3 per unit time. The greater the difference, the thicker the formed water film.

[0070] Generally, the solution flow rate flowing to the upper treatment plate 3 is relatively close to the solution flow rate flowing from the upper treatment plate 3 to the lower treatment plate 3. Therefore, the density and aperture of the through holes 30 on the upper treatment plate 3 are equal to the density and aperture of the through holes 30 on the lower treatment plate 3, so that water films of similar thicknesses are formed on the upper treatment plate 3 and the lower treatment plate 3. Of course, different thicknesses of water films can also be formed on the upper and lower layers by differentiating the design of the through holes 30 on the upper treatment plate 3 and the lower treatment plate 3.

[0071] In addition, it should be noted that the greater the thickness of the water film, the greater the resistance to the flue gas. Therefore, a thicker water film will also reduce the flow rate of the flue gas, resulting in a slower overall flue gas treatment speed. Similarly, the more treatment plates 3 there are, the greater the resistance to the flue gas will be, and the flue gas treatment speed will also be reduced. Therefore, the number of treatment plates 3 and the thickness of the water film should be designed by comprehensively considering the resistance of the treatment plates 3 to the flue gas and the flow rate of the flue gas.

[0072] Furthermore, since the flue gas enters the tower from one side of the flue gas treatment tower, when the treatment plate 3 is not arranged, the flue gas concentration in the space near the flue gas inlet side inside the tower is relatively high, and the flue gas concentration in the pore diameter on the side far from the flue gas inlet is relatively low. After arranging the treatment plate 3, due to the resistance effect of the treatment plate 3 on the flue gas, the flue gas diffuses around after contacting the treatment plate 3, thereby redistributing the flue gas, making the flue gas distribution inside the tower relatively uniform. On this basis, when multiple treatment plates 3 are arranged, each treatment plate 3 can play the effect of redistributing the flue gas, and thus can further improve the uniformity of flue gas distribution.

[0073] In this embodiment, after arranging multiple treatment plates 3 distributed along the axis, when spraying the solution onto the treatment plate 3, a water film with a certain thickness is formed on the upper surface of each treatment plate 3 by means of the through holes 30 on the treatment plate 3. The flue gas introduced from below the treatment plate 3 needs to pass through the water film and flow upward. By using the water film, the contact degree and reaction time between the flue gas and the solution are increased, thereby achieving the purpose of increasing the reaction time of the flue gas with the solution in the processor, enabling the flue gas to fully react with the solution when passing through the processor, and improving the treatment degree of impurities and gases in the flue gas. Furthermore, the problem in the related art that the reaction time of the flue gas with the solution in the treatment tower is short, resulting in incomplete flue gas treatment, is solved; and, after increasing the reaction time of the flue gas with the solution, the effective utilization rate of the solution is also improved, and the recovery pressure and usage cost are reduced;

[0074] In one implementation manner, the aperture of the through holes 30 on the treatment plate 3 located in the upper layer is larger than the aperture of the through holes 30 on the treatment plate 3 located in the lower layer; and / or

[0075] The density of the through holes 30 on the treatment plate 3 located in the upper layer is greater than the density of the through holes 30 on the treatment plate 3 located in the lower layer.

[0076] Specifically, it should be noted that the flue gas flow rate and temperature are relatively high at the position near the flue gas inlet in the flue gas treatment tower. To improve the flue gas treatment effect, it is necessary to quickly reduce the flue gas flow rate and temperature and make the flue gas distribute more uniformly inside the tower. And the treatment plate 3 located in the lower layer in the processor is closest to the flue gas inlet. Therefore, the above purposes need to be achieved through the treatment plate 3 in the lower layer. To achieve this purpose, it is necessary to make the water film thickness of the treatment plate 3 in the lower layer thicker. Since the flow rate of the solution flowing to this treatment plate 3 is constant, when the number of through holes 30 is the same, to increase the water film thickness, it is necessary to reduce the aperture of the through holes 30 on the treatment plate 3 in the lower layer. And when the aperture of the through holes 30 is the same, to increase the water film thickness, it is necessary to reduce the number of through holes 30 on the treatment plate 3 in the lower layer and reduce the density of the through holes 30 on the treatment plate 3 in the lower layer. In actual operation, one of the methods can be selected according to the situation to adjust the water film thickness on the treatment plate 3 in the lower layer, or both methods can be selected simultaneously to adjust the water film thickness on the treatment plate 3 in the lower layer.

[0077] In one embodiment, the through holes 30 on the upper processing plate 3 are misaligned with the through holes 30 on the lower processing plate 3.

[0078] Specifically, in this embodiment, taking the processing plate 3 being set as two as an example, the flow path of the flue gas through the processor is as follows: first, it flows in through the through holes 30 on the lower processing plate 3, flows upward in the space between the two processing plates 3, and then flows out through the through holes 30 on the upper processing plate 3. To further improve the distribution uniformity of the flue gas, in this embodiment, the through holes 30 on the upper and lower processing plates 3 are misaligned, so that the flue gas flowing in through the through holes 30 on the lower processing plate 3 will be further blocked by the upper processing plate 3 and spread out, and then flow out through the through holes 30 on the upper processing plate 3.

[0079] Optionally, a catalytic coating is provided on the upper surface of the processing plate 3, and the catalytic coating is used to accelerate the chemical reaction between the flue gas and the solution.

[0080] Specifically, it should be noted that when ammonia and sulfur dioxide in the flue gas need to be treated, the sprayed solution contains sulfate ions. After the solution contacts the flue gas, ammonia and sulfur dioxide in the flue gas react with sulfate ions to generate salt substances such as ammonium sulfate. Therefore, to accelerate this chemical reaction process, a catalyst can be added. In this embodiment, a catalytic coating is provided on the upper surface of the processing plate 3, and the catalytic coating is a coating containing a catalyst. Since most of the flue gas treatment process is in the water film on the upper surface of the processing plate 3, when the catalytic coating is provided on the upper surface of the processing plate 3, the catalytic coating can catalyze the chemical reaction in the water film, thereby improving the flue gas treatment efficiency.

[0081] In another embodiment, loose catalytic fillers are arranged on the upper surface of the processing plate 3. After the water film is formed, the catalytic fillers are located in the water film, and the chemical reaction between the flue gas and the solution is accelerated through the catalytic fillers.

[0082] Optionally, as Figures 2 to 6 shown, a plurality of partition plates 4 are provided on the upper surface of the processing plate 3, and a plurality of mutually separated chambers 5 are formed above the processing plate 3 through the partition plates 4.

[0083] Specifically, in this embodiment, to enable the upper surface of the processing plate 3 to form a water film with a uniform thickness, the processing plate 3 needs to be horizontal. Since the diameter of the flue gas treatment tower is relatively large, the processing plate 3 often also has a relatively large diameter, and it is difficult to ensure the levelness when installing the processing plate 3 with a relatively large diameter. When the processing plate 3 is a flat plate-like structure, if several processing plates 3 are in an inclined state, the water film thickness at the higher end of the processing plate 3 will be relatively thin or there will be no water film, resulting in the flue gas not being treated, while the water film thickness at the lower end will be relatively large, making it difficult for the flue gas to pass through smoothly.

[0084] To this end, in this embodiment, a plurality of partition plates 4 are arranged on the upper surface of the processing plate 3, and a plurality of separated chambers 5 are formed above the processing plate 3 through the partition plates 4. Even if the processing plate 3 is in an inclined state after installation, since a plurality of chambers 5 are formed by the partition plates 4, the solution on the processing plate 3 will not directly flow from the high side to the low side, but ensure that a water film with a certain thickness can be formed in each chamber 5.

[0085] In addition, in this embodiment, after adding the partition plates 4 on the processing plate 3, the structural strength and bending resistance of the entire processing plate 3 are increased, and even if the diameter of the processing plate 3 is large, it is not easy to generate bending deformation.

[0086] In one implementation, as Figures 2 to 6 shown ( Figure 4 the longitudinal plates 41 in the partition plates 4 are omitted), the partition plates 4 can be a plate-like structure with horizontal and vertical intersections, including a plurality of cross plates 40 and longitudinal plates 41. The cross plates 40 and longitudinal plates 41 are welded and fixed on the upper surface of the processing plate 3, and the upper surface of the processing plate 3 is divided into a plurality of regions by the cross plates 40 and longitudinal plates 41, and each region forms an independent chamber 5. The regions located at the edge can use a circular plate added to the edge of the processing plate 3 as the closed edge of this region, or the inner wall of the support structure 2 or the flue gas treatment tower can be used as the closed edge of this region.

[0087] For the convenience of the fixed connection of the cross plates 40 and longitudinal plates 41, as Figure 7 shown, in one implementation, a first folding portion 400 can be provided at the upper ends of all the cross plates 40, and a second folding portion 410 can be provided at the upper ends of the longitudinal plates 41. The first folding portion 400 and the second folding portion 410 are attached and fixedly connected. Both the first folding portion 400 and the second folding portion 410 can be plate-like structures extending in the horizontal direction.

[0088] In another implementation, when a first flipping portion 400 is provided at the upper ends of some of the cross plates 40, since the longitudinal plates 41 are located between two adjacent cross plates 40, in order to enable the second folding portions 410 on each longitudinal plate 41 to have corresponding first folding portions 400 for connection, a first folding portion 400 can be provided at the upper end of one of the two adjacent cross plates 40. In addition, the side elevation of the longitudinal plate 41 can also be welded and fixed to the inner side of the cross plate 40, thereby further improving the connection strength.

[0089] In one implementation, the processing plate 3 is a circular plate. In another implementation, the processing plate 3 can be a plurality of sector plates, and when installing, a plurality of sector plates need to be spliced to form a circular plate for easy installation in the flue gas treatment tower.

[0090] In one implementation, as Figure 2 and Figure 6As shown, the processing board 3 includes a plurality of individual plates 31, and a plurality of through holes 30 are provided on each plate 31. The plates 31 are fixedly arranged on the support structure 2.

[0091] When the overall diameter of the processing board 3 is relatively large, for the convenience of transportation and installation of the processing board 3, in this embodiment, the processing board 3 is divided into a plurality of individual plates 31. During transportation, the plurality of plates 31 can be stacked to reduce the occupied space. During installation, each plate 31 is fixed to the support structure 2 one by one according to the corresponding division method, and finally the processing board 3 and the processor are assembled. The plates 31 and the support structure 2 can be fixed by welding or by bolts, etc. In this embodiment, no limitation is made thereto here.

[0092] According to different division methods, plates 31 with different numbers and shapes will be formed. In one embodiment, the processing board 3 is an overall circular plate. As Figure 2 and Figure 6 shown, by longitudinally and transversely dividing the processing board 3, a plurality of rectangular plates 311 and special-shaped plates 310 with arc-shaped edges can be obtained. The special-shaped plates 310 correspond to the edge regions of the processing board 3. On this basis, the division spacing also determines the sizes of the respective plates 31. Therefore, the corresponding division method can be selected according to the actual situation.

[0093] In another embodiment, the processing board 3 includes a plurality of sector plates that can be spliced into a circle. For example, the processing board 3 includes two semi-circular plates. Similarly, by longitudinally and transversely dividing a single processing board 3, a plurality of rectangular plates 311 and special-shaped plates 310 with arc-shaped edges can be obtained. The special-shaped plates 310 correspond to the edge regions of the processing board 3.

[0094] After the processing board 3 is divided into a plurality of plates, in order to enable the processing board 3 to form a plurality of chambers 5 through the longitudinal plates 41 and the transverse plates 40 after assembly, in this embodiment, one transverse plate 40 is respectively arranged on two opposite sides of the rectangular plate 311. The transverse plates 40 between adjacent rectangular plates 311 are mutually attached and fixedly connected, and longitudinal plates 41 are arranged in the middle of each rectangular plate 311.

[0095] Specifically, the transverse plate 40 in this embodiment is a plate-like structure arranged in a single direction. For the rectangular plate 311, the transverse plate 40 is only arranged on two opposite sides of the rectangular plate 311 (for example, on the long sides or short sides of the rectangular plate 31). When the rectangular plates 311 are arranged on the support structure 2 along the direction of the other pair of sides, the transverse plates 40 between adjacent rectangular plates 311 are mutually attached. The rectangular plates 311 can be welded or fixed to the support structure 2 by bolts, and at the same time, the adjacent transverse plates 40 are welded or fixed by bolts.

[0096] In one embodiment, as Figure 8As shown in the figure, the height of the cross plate 40 on one long side of the rectangular plate 311 is less than that of the cross plate 40 on the other side. While facilitating the welding and fixing of two adjacent cross plates 40, the material used for the cross plate 40 is reduced, thereby reducing the usage cost. In this embodiment, since the height of the cross plate 40 on one side of the rectangular plate 311 is relatively small and cannot provide the first folding portion 400 for connecting with the second folding portion 410 on the longitudinal plate 41, for one rectangular plate 311, the first folding portion 400 can be selectively provided on the cross plate 40 with a higher height on the rectangular plate 311.

[0097] When two rectangular plates 311 are assembled, as Figure 7 shown, the higher cross plate 40 on one rectangular plate 311 fits with the lower cross plate 40 on the other rectangular plate 311. Therefore, after assembly, for the same rectangular plate 311, there are higher cross plates 40 on both sides of the rectangular plate 311. The higher cross plate 40 can be provided with the first folding portion 400. Therefore, both ends of the second folding portion 410 arranged on the longitudinal plate 41 on the rectangular plate 311 can be fixedly connected to the corresponding first folding portion.

[0098] In one embodiment, as Figure 4 shown, the support structure 2 includes support beams 202 arranged in a crisscross pattern, and each rectangular plate 311 and the special-shaped plate 310 are fixed on the support beams 202.

[0099] Specifically, in this embodiment, the support beams 202 are arranged in a crisscross pattern to provide stable support for the processing plate 3. Since the processing plate 3 is provided in multiple pieces, the support beams 202 are also provided in multiple groups, and each group of support beams 202 is used to support one processing plate 3. The upper and lower groups of support beams 202 can be connected by connecting members such as diagonal braces 203 to ensure the structural stability of the entire support structure 2.

[0100] When the processing plate 3 is divided into multiple plate bodies, to provide fixed positions for each plate body, in this embodiment, the positions of the support beams 202 correspond to the division positions of the processing plate 3, that is, they correspond to the edge positions of the plate bodies, and at least one pair of opposite edges on the plate body can be fixed on the corresponding support beams 202.

[0101] In one embodiment, the support structure 2 further includes an enclosing plate 204, and the support beams 202 are fixed inside the enclosing plate 204.

[0102] Specifically, the enclosing plate 204 surrounds the outside of the entire support beams 202 and the processing plate 3. The support beams 202 and the processing plate 3 are both installed inside the enclosing plate 204. The enclosing plate 204 can be fixedly connected to the inside of the flue gas treatment tower, and the entire processor is installed in the flue gas treatment tower through the enclosing plate 204.

[0103] In a specific embodiment, for the convenience of transportation, the support structure 2 is provided as two semi-circular parts, which can be installed in the flue gas treatment tower on-site to form a circular structure. Correspondingly, in a single part of the support structure 2, the surrounding plate 204 includes a semi-circular plate and a straight plate. The two ends of the straight plate are fixed to the two ends of the semi-circular plate to form a semi-circular frame, and the support beam 202 is fixed within the frame and fixedly connected to the corresponding semi-circular plate and straight plate. In this embodiment, when dividing the circular treatment plate 3, the circular treatment plate 3 is preferably divided into two semi-circular plates first, and then the two semi-circular plates are divided.

[0104] On the basis of providing a catalytic coating on the treatment plate 3, the treatment plate 3 can also be made of a material with catalytic effect to accelerate the chemical reaction between the flue gas and the solution.

[0105] For large flue gas treatment towers, it is necessary to configure flue gas processors with a larger diameter, and the installation and transportation of large-diameter flue gas processors are both relatively difficult.

[0106] Therefore, on the basis of the above embodiment, as Figure 2 and Figure 3 shown, this embodiment provides a processor for flue gas treatment, including:

[0107] The processor includes a plurality of processing units 1. The processing units 1 are fan-shaped, and the plurality of processing units 1 can be assembled circumferentially within a columnar space;

[0108] The processing unit 1 includes a support structure 2 and a treatment plate 3. The support structure 2 is arranged to allow the solution to flow through;

[0109] A plurality of through holes 30 are provided on the treatment plate 3. The aperture and density of the through holes 30 satisfy that the sum of the solution flow rates allowed to pass through by the plurality of through holes 30 per unit time is less than the solution flow rate flowing to the treatment plate 3 where the through holes 30 are located per unit time.

[0110] In this embodiment, the processor is set as a plurality of split processing units 1. Each processing unit 1 is fan-shaped. After the plurality of fan-shaped processing units 1 are arranged circumferentially, they can be installed in a columnar space, that is, they can be installed in the flue gas treatment tower. According to different layout methods, the plurality of processing units 1 can be closely attached or arranged at intervals. To make full use of the space, it is preferably that the plurality of processing units 1 are closely attached to each other. Each processing unit 1 includes a support structure 2 and a treatment plate 3. The support structure 2 and the treatment plate 3 in this embodiment have the same functions as the support structure 2 and the treatment plate 3 in the above embodiment, and will not be elaborated here. In one embodiment, the support structure 2 is provided as a fan-shaped frame structure. The treatment plate 3 in a single processing unit 1 can be provided as one or more. When it is provided as one, the treatment plate 3 is provided as fan-shaped and installed on the support structure 2.

[0111] In this embodiment, the processor is set to multiple separable processing units 1. During transportation, the processing units 1 can be placed separately. After arriving at the site, the multiple processing units 1 are installed one by one in the flue gas treatment tower. Since the processing unit 1 is fan-shaped, when installed in a certain order along the circumference, the processing units 1 can form a circular processor, enabling it to adapt to the columnar flue gas treatment tower, thus achieving the purpose of reducing the space requirement for the large processor during transportation and reducing the installation difficulty during installation, and further solving the problem of inconvenient installation and transportation of the large-diameter flue gas processor in the related art.

[0112] In one implementation, as Figure 4 shown, the support structure 2 includes an enclosing plate 204 and support beams 202. The enclosing plate 204 encloses a fan-shaped space, and a plurality of support beams 202 are arranged in the fan-shaped space and fixedly connected to the enclosing plate 204.

[0113] The processing plate 3 is disposed in the fan-shaped space and fixedly connected to the support beams 202.

[0114] Specifically, in this embodiment, the processing plate 3 can be a fan-shaped plate matching the fan-shaped space, or a plurality of plates 31 are installed in the fan-shaped space to form the processing plate 3. The edge of the processing plate 3 fits against the inner side of the enclosing plate 204, and the enclosing plate 204 is used as the retaining structure for the water film on the processing plate 3.

[0115] When the enclosing plate 204 encloses a fan-shaped space, as Figure 4 shown, the enclosing plate 204 includes a first plate body 2040 and a second plate body 2041. In this embodiment, the enclosing plate 204 has at least two forms. One form is that the fan-shaped space enclosed by the enclosing plate 204 is semi-circular, and the other form is that the fan-shaped space enclosed by the enclosing plate 204 is a non-semi-circular fan shape. Correspondingly, when the fan-shaped space enclosed by the enclosing plate 204 is semi-circular, the first plate body 2040 is a semi-circular arc plate, the second plate body 2041 is a straight plate, and the two ends of the second plate body 2041 are fixedly connected to the two ends of the arc plate.

[0116] When the fan-shaped space enclosed by the enclosing plate 204 is other fan shapes, the first plate body 2040 is a non-semi-circular arc plate, the second plate body 2041 is a V-shaped plate, and the two ends of the second plate body 2041 are fixedly connected to the two ends of the arc plate.

[0117] Both ends of the support beam 202 are fixedly connected to the corresponding first plate body 2040 and second plate body 2041, and the fixing method can be welding or bolt connection.

[0118] When adjacent processing units 1 are closely attached to each other, the second plate bodies 2041 in adjacent enclosing plates 204 are closely attached, and the two ends of the first plate bodies 2040 in adjacent enclosing plates 204 are closely attached to form a circle.

[0119] In one embodiment, as Figure 4 shown, two support structures 2 are provided and symmetrically distributed. The corresponding enclosing plates 204 enclose a semi-circular space. The first plate body 2040 is a semi-circular arc plate, and the second plate body 2041 is a straight plate. The second plate bodies 2041 in the two support structures 2 are closely attached.

[0120] Furthermore, as Figure 4 shown, a plurality of support beams 202 are crisscrossed. The two ends of the support beams 202 are fixedly connected to the enclosing plates 204; the processing plate 3 is fixedly arranged on the upper end surface of the support beams 202.

[0121] At least one support beam 202 in the plurality of support beams 202 is attached to the inner side of the second plate body 2041; to facilitate supporting the arc-shaped edge of the processing plate 3, in this embodiment, the support structure 2 further includes an arc-shaped support plate 201. The arc-shaped support plate 201 is fixedly arranged on the inner side of the enclosing plate 204 and is attached to the inner side of the first plate body 2040. The arc-shaped edge of the processing plate 3 is supported by the arc-shaped support plate 201, and the straight-line edge of the processing plate 3 is supported by the support beams 202.

[0122] When two sets of processing plates 3 are arranged vertically, two sets of support beams 202 are provided and vertically distributed in the fan-shaped space. Each set of support beams 202 is provided with a plurality of support beams 202 that are crisscrossed; the upper ends of each set of support beams 202 are fixedly provided with processing plates 3.

[0123] To further improve the support performance, the support structure 2 further includes diagonal braces 203. A plurality of diagonal braces 203 are provided and are located between the two sets of support beams 202. The upper and lower ends of the diagonal braces 203 are respectively fixedly connected to the corresponding support beams 202.

[0124] In one embodiment, as Figure 1 shown, the waste liquid treatment subsystem 15 includes:

[0125] A water treatment module 150, which is used to receive the waste liquid discharged from the liquid storage area 10 and purify the waste liquid. The treated purified water returns to the flue gas treatment tower 6, and the treated salty concentrated water is transported to the next level;

[0126] A buffer tank 151, which is connected to the water treatment module 150 and is used to receive the treated salty concentrated water and transport the salty concentrated water to the next level respectively;

[0127] A decomposition furnace 153, which is connected to the buffer tank 151 and is used to receive the separated salty concentrated water and recycle it;

[0128] The grate cooler 152 is connected to the buffer tank 151 and is used to receive the salt-containing concentrated water of part of the buffer tank and recycle it.

[0129] In this embodiment, the water treatment module 150 is connected to the liquid storage area 10 through a water pump. The waste liquid in the liquid storage area 10 is pumped into the water treatment module 150 through the water pump, and the waste liquid is treated by the water treatment module 150. The treatment process may include purifying the waste liquid. The treated purified water can be transported back to the liquid storage area 10 as a solvent for the treatment agent through the water pump, and the treated salt-containing concentrated water is transported to the buffer tank 151. The salt-containing concentrated water includes solid fine particle impurities, water-soluble salt substances, and water-insoluble salt substances. Therefore, the salt-containing concentrated water needs to be further treated.

[0130] Specifically, after the flue gas is treated, the formed salt-containing solution contains ammonium salts, ammonium sulfate, nitrogen oxides, etc. Therefore, the salt-containing concentrated water can be transported to the decomposition furnace 153 for high-temperature treatment. In a high-temperature environment, ammonium sulfate decomposes into sulfate radicals and ammonia. Among them, the sulfate radicals react with the alkaline mineral calcium oxide decomposed from calcium carbonate in the decomposition furnace 153 to form calcium sulfate and enter the kiln with the raw meal. The ammonia decomposed from the ammonium salts undergoes a redox reaction with the nitrogen oxides to generate nitrogen gas, which can be used for denitrification to save ammonia water. Finally, calcium sulfate, nitrogen gas, and ammonia water are obtained after treating the salt-containing concentrated water in this embodiment. In addition, the salt-containing concentrated water can also be directly introduced into the grate cooler 152 for treatment. For example, it is introduced into the high-temperature section in the grate cooler 152 for treatment and recycling. The treatment includes that the ammonia decomposed from the ammonium salts enters the kiln and furnace with the secondary and tertiary air and is directly used for denitrification to save ammonia water. The sulfate radicals decomposed from the ammonium salts react with the alkaline mineral calcium oxide on the surface of the clinker to form stable calcium salts and enter the warehouse with the clinker.

[0131] In this embodiment, the flue gas is subjected to deammoniation and desulfurization treatment by the flue gas treatment tower 6. The ammonia water obtained after deammoniation can be further used for denitrification treatment, so that multiple substances can be treated in one treatment process, further improving the treatment efficiency, and fully recycling the beneficial substances after the flue gas treatment. In addition, it should be noted that in the present invention, oxygen is input into the flue gas treatment tower 6 through the oxygen input subsystem 12, so that sulfur dioxide in the flue gas treatment tower 6 can be converted into sulfur trioxide, which can form ammonium sulfate after dissolving in water and is beneficial to the subsequent formation of calcium sulfate.

[0132] In one embodiment, as Figure 1As shown, the oxygen input subsystem 12 includes an oxidation blower 120. An oxygen inlet 601 is provided on the flue gas treatment tower 6. The oxygen inlet 601 is located below the flue gas inlet 602. The oxidation blower 120 is connected to the oxygen inlet 601 and is used to input oxygen from the oxygen inlet 601 into the flue gas treatment tower 6 to promote the chemical reaction of sulfur-containing substances in the flue gas treatment tower 6. According to actual requirements, multiple oxidation blowers 120 can be provided.

[0133] In one embodiment, since it is necessary to detect the absorbent in the liquid storage area 10 in real time during the flue gas treatment process, including but not limited to detecting the composition and pH value of the absorbent. For this reason, the flue gas deammoniation treatment system in this embodiment further includes an absorption area sump subsystem 16. The absorption area sump subsystem 16 is connected to the liquid storage area 10 and is used to extract the absorbent that has participated in the flue gas treatment from the liquid storage area 10 and transport the extracted absorbent back to the liquid storage area 10, and detect the absorbent that has participated in the flue gas treatment through the absorption area sump subsystem 16.

[0134] Specifically, in this embodiment, the absorption area sump subsystem 16 includes an absorption area sump and a corresponding sump pump. The liquid in the liquid storage area 10 is continuously pumped into the absorption area sump by the sump pump, and the liquid in the absorption area sump is detected by corresponding detection equipment. At the same time, the liquid in the absorption area sump also needs to be continuously transported back to the liquid storage area 10 for use as an absorbent. Therefore, the liquid in the absorption area sump is in a continuous flow state, and its state is basically the same as that of the liquid in the liquid storage area 10. By detecting the liquid in the absorption area sump, the state of the liquid in the liquid storage area 10 can be judged.

[0135] In one embodiment, processes such as the replenishment of treatment agents, the replenishment of aqueous solutions, and the extraction of waste liquid can be judged by the state of the liquid in the absorption area sump.

[0136] In one embodiment, in order to facilitate the maintenance and cleaning of the flue gas treatment tower 6, it is necessary to drain the absorbent in the liquid storage area 10. For this reason, in this embodiment, an absorbent buffer system 17 is further included. The absorbent buffer system 17 is used to buffer the absorbent in the liquid storage area 10 and transport the buffered absorbent back to the liquid storage area 10.

[0137] Specifically, the absorbent buffer system 17 can include an absorbent buffer tank 151. Its input end can be connected in parallel to the output end of the absorption area sump subsystem 16, and its output end is connected to the liquid storage area 10 through an absorbent return pump. The absorbent buffer tank 151 is used to buffer the absorbent in the liquid storage area 10, which is convenient for the maintenance and cleaning of the flue gas treatment tower 6. In subsequent processing, the absorbent is transported back to the liquid storage area 10 through the absorbent return pump.

[0138] In one embodiment, asFigure 1 As shown, the reagent delivery subsystem 18 includes: an alkaline reagent delivery component 180 for inputting an alkaline reagent into the liquid storage area 10; and an acidic reagent delivery component 181 for inputting an acidic reagent into the liquid storage area 10.

[0139] In one embodiment, to improve the treatment effect on the flue gas, it is desired that the flue gas in each area of the flue gas treatment tower 6 can contact the absorbent sprayed by the spraying component 8, so as to use the absorbent to treat the flue gas. Additionally, in the core processor 7 part, it is necessary to rely on the absorbent sprayed by the spraying component 8 to form a water film. To enable the flue gas to fully contact the absorbent, the surface of the core processor 7 should be completely covered by the water film, so that all the flue gas passing through the core processor 7 needs to pass through the water film.

[0140] Therefore, the spraying range of the spraying component 8 needs to cover the core processor 7, so as to form a complete water film on the core processor 7. Even after the processing board of the core processor 7 is partitioned, a water film can still be formed in each area, ensuring full contact between the flue gas and the absorbent.

[0141] Specifically, in this embodiment, the spraying component 8 includes a first spray head 801, a second spray head 802, and a third spray head 803 arranged in sequence from top to bottom. The spraying ranges of the first spray head 801, the second spray head 802, and the third spray head 803 intersect and jointly cover the core processor 7. In this embodiment, each spray head includes a plurality of nozzles, and the ranges of each nozzle intersect, thus avoiding the generation of unsprayed areas. The first spray head 801, the second spray head 802, and the third spray head 803 are staggered by a certain angle in the circumferential direction, so as to ensure full coverage.

[0142] Correspondingly, after the first spray head 801, the second spray head 802, and the third spray head 803 are set, the absorbent circulation subsystem 11 includes a first circulation pump 110, a second circulation pump 111, and a third circulation pump 112. The two ends of the first circulation pump 110 are respectively connected to the liquid storage area 10 and the first spray head 801, the two ends of the second circulation pump 111 are respectively connected to the liquid storage area 10 and the second spray head 802, and the two ends of the third circulation pump 112 are respectively connected to the liquid storage area 10 and the third spray head 803.

[0143] In the present invention, although the flue gas carrying droplets has undergone gas-liquid separation through the demisting component 9, there will still be some tiny droplets in the separated flue gas, and these tiny droplets also need to be treated. For this reason, as Figure 1 shown, this embodiment further includes a smoke collection subsystem 19. The smoke collection subsystem 19 is arranged at the upper part of the flue gas treatment tower 6 and is communicated with the flue gas outlet 603. The smoke collection subsystem 19 is used to collect the gas containing droplets after the flue gas treatment and perform gas-liquid separation on the gas containing droplets, and the separated gas is discharged from the flue gas outlet 603.

[0144] Specifically, the smoke collection subsystem 19 can adopt different structures according to different gas-liquid separation methods. For example, a dedicated gas-liquid separation device is connected to the upper end of the flue gas treatment tower to perform gas-liquid separation on the flue gas. In another embodiment, the rotation of the flue gas is generated by the rising speed of the flue gas to contact the wall on the path, thereby achieving gas-liquid separation. In still another embodiment, the flow path of the flue gas is increased, and the path is bent multiple times to achieve gas-liquid separation.

[0145] To reduce costs, the flow rate of the flue gas is reasonably utilized for gas-liquid separation, and the resistance of the flue gas during gas-liquid separation is reduced to ensure sufficient treatment efficiency. As Figure 1 and Figure 9 shown, the smoke collection subsystem 19 in this embodiment includes a smoke collection hood 190 and an exhaust pipe 193. The smoke collection hood 190 is set to be conical. A first ventilation port 194 is provided at the upper end of the smoke collection hood 190. The lower end of the exhaust pipe 193 is connected to the first ventilation port 194, and the exhaust pipe 193 is communicated with the flue gas outlet 603;

[0146] A second ventilation port 191 is provided on the smoke collection hood 190, and a third ventilation port 192 is provided on the exhaust pipe 193. The second ventilation port 191 and the third ventilation port 192 are communicated through a pipeline. The orientation of the third ventilation port 192 deviates from the axis of the exhaust pipe 193, so that the gas discharged from the third ventilation port 192 enters the exhaust pipe 193 from the tangential direction of the exhaust pipe 193, causing the gas in the exhaust pipe 193 to rise in a cyclone manner and achieve gas-liquid separation.

[0147] Specifically, as Figure 9 shown, in this embodiment, the conical smoke collection hood 190 can collect the treated flue gas and collect the flue gas into the exhaust pipe 193 through the first ventilation port 194. The first ventilation port 194 can be located in the middle of the smoke collection hood 190. The diameter of the exhaust pipe 193 is much smaller than the inner diameters of the smoke collection hood 190 and the flue gas treatment tower 6. Therefore, the flow rate of the flue gas further increases when it enters the exhaust pipe 193. In this embodiment, in order to make the flue gas entering the exhaust pipe 193 rotate and make the liquid droplets in the flue gas contact the wall of the exhaust pipe 193 to achieve gas-liquid separation, a second ventilation port 191 is eccentrically provided on the smoke collection hood 190, and a third ventilation port 192 is provided on the exhaust pipe 193. The second ventilation port 191 and the third ventilation port 192 are kept connected through a pipeline. In order to make the flue gas in the exhaust pipe 193 rotate, a tangential force needs to be provided for the flue gas. Therefore, in this embodiment, the third ventilation port 192 does not directly face the middle of the exhaust pipe 193, but deviates from the axis of the exhaust pipe 193, making it face the left or right side of the exhaust pipe 193, so that the flue gas entering the exhaust pipe 193 from the third ventilation port 192 can provide a tangential force for the flue gas in the exhaust pipe 193, causing the flue gas in the exhaust pipe 193 to rotate and rise to achieve gas-liquid separation.

[0148] In this embodiment, the flue gas treated in the flue gas treatment tower 6 is divided into two paths from the smoke collecting hood 190. The first path is the main path and enters the exhaust pipe 193 through the first ventilation port 194 and flows upward. The second path enters the exhaust pipe 193 tangentially from the exhaust pipe 193 through the second ventilation port 191, the pipeline and the third ventilation port 192. The velocity of the flue gas itself is used to provide a tangential thrust to the flue gas in the exhaust pipe 193, so that the flue gas in the exhaust pipe 193 spirally rises as a whole. During the spiral rising process, the tiny droplets carried by the flue gas contact the inner wall of the exhaust pipe 193 and adhere to the inner wall. On the one hand, it realizes the further gas-liquid separation of the treated flue gas and reduces the content of tiny droplets in the flue gas, thus solving the problem that the flue gas discharged from the flue gas treatment tower 6 in the related art still carries a large amount of tiny droplets. On the other hand, the velocity of the flue gas itself is fully utilized to form a spirally upward flowing air flow in the exhaust pipe 193, without introducing additional air guiding equipment, reducing the cost of flue gas treatment.

[0149] On this basis, to further facilitate the rotation of the flue gas in the exhaust pipe 193, as Figure 9 shown, the second ventilation port 191 is provided with a plurality of them and is distributed along the circumferential direction of the first ventilation port 194. The third ventilation port 192 is provided with a plurality of them and is distributed along the circumferential direction of the exhaust pipe 193, and the orientations of the plurality of third ventilation ports 192 are all in the clockwise direction or the counterclockwise direction; the plurality of second ventilation ports 191 are respectively communicated with the plurality of third ventilation ports 192 through pipelines.

[0150] In this embodiment, the orientations of all the third ventilation ports 192 are all in the clockwise direction or the counterclockwise direction. Multiple third ventilation ports provide multiple tangential thrusts for the flue gas in the exhaust pipe, so as to better make the flue gas in the exhaust pipe rotate. In a specific implementation manner, the second ventilation port 191 is provided with two and is located on the opposite sides of the smoke collecting hood 190. Correspondingly, the third ventilation port 192 is also provided with two and is located on both sides of the exhaust pipe 193. Two third ventilation ports 192 provide a greater and more stable tangential force for the flue gas in the exhaust pipe 193, ensuring the stable rotation of the flue gas in the exhaust pipe 193, and at the same time ensuring that a sufficient amount of flue gas enters the flue gas in the exhaust pipe from the first ventilation port 194, improving the flue gas treatment efficiency.

[0151] When a plurality of second ventilation ports 191 and a plurality of third ventilation ports 192 are provided, the plurality of second ventilation ports 191 can be evenly distributed along the circumferential direction on the air collecting hood, and the plurality of third ventilation ports 192 are distributed along the spiral direction on the exhaust pipe 193, so as to better push the flue gas in the exhaust pipe 193 to spiral upward.

[0152] Specifically, when there are two second vent holes 191 and two third vent holes 192, the two second vent holes 191 can be symmetrically distributed on the air collecting hood, and the two third vent holes 192 are respectively located on both sides of the exhaust pipe 193 and are vertically distributed, so as to better promote the spiral upward movement of the flue gas in the exhaust pipe 193.

[0153] To facilitate the rotation of the flue gas, the exhaust pipe 193 is set as a circular pipe, and the third vent hole 192 needs to face the tangent of the exhaust pipe 193. To provide sufficient tangential force, the third vent hole 192 needs to have a sufficient diameter, and its orientation needs to be as close as possible to the edge of the exhaust pipe 193, that is, sufficiently deviated from the axis of the exhaust pipe 193. When the third vent hole 192 is a circular hole, the diameter of the third vent hole 192 is limited, resulting in insufficient tangential force. Therefore, as Figure 9 shown, in this embodiment, the third vent hole 192 is set as a square hole, so as to provide a larger outlet area while being as close as possible to the edge of the exhaust pipe 193, thereby being able to provide sufficient tangential force, providing the rotation stability and rotation speed of the flue gas in the exhaust pipe 193, and finally providing the gas-liquid separation effect.

[0154] After the third vent hole 192 is set as a square hole, it belongs to a special-shaped structure for conventional pipeline connection. Therefore, a special-shaped interface needs to be welded separately by a steel plate. The first end of the interface matches the third vent hole 192, and the second end is still a circular hole for connecting with the pipeline. To ensure the structural strength of the interface, strengthening structures such as reinforcing ribs can be welded on each steel plate forming the interface.

[0155] On this basis, as Figure 9 shown, the upper boundary of the third vent hole 192 is a spiral shape extending around the wall of the exhaust pipe 193, which further facilitates the formation of a spiral upward airflow in the exhaust pipe 193. Further, the lower boundary of the third vent hole 192 is also a spiral shape extending around the wall of the exhaust pipe 193, and the height difference between the starting point and the ending point of the lower boundary is smaller than the height difference between the starting point and the ending point of the upper boundary. The connection line between the starting point of the upper boundary and the starting point of the lower boundary is a straight line, and the connection line between the ending point of the upper boundary and the ending point of the lower boundary is a straight line, that is, the side boundaries on both sides of the third vent hole are straight lines.

[0156] Based on the flue gas denitrification system in the above embodiments, this embodiment provides a flue gas denitrification process, including:

[0157] S10. Pass the flue gas into the flue gas treatment tower 6, and make the flue gas flow upward in the flue gas treatment tower 6;

[0158] S20. Pass oxygen into the flue gas treatment tower 6 through the oxygen input subsystem 12 to promote the oxidation reaction of the substances containing sulfur in the lower valence state in the flue gas treatment tower 6;

[0159] S30. Input the treatment agent into the flue gas treatment tower 6 and mix it with the aqueous solution in the liquid storage area 10 to form an absorbent;

[0160] S40. Through the absorbent circulation subsystem 11, transport the absorbent in the liquid storage area 10 at the lower part of the flue gas treatment tower 6 to the upper spray assembly 8, and spray the absorbent downward by the spray assembly 8;

[0161] S50. By controlling the flow rate of the spray assembly 8, while the absorbent passes through the core processor 7 located below the spray assembly 8, form multiple water films in the core processor 7, so that the upward flowing flue gas passes through the core processor 7 while passing through multiple water films and reacts with the absorbent. The absorbent absorbs ammonia in the flue gas and forms salt substances and returns to the liquid storage area 10;

[0162] S60. Carry out demisting treatment on the flue gas passing through the water film by the demisting assembly 9 located above the spray assembly 8, and the demisted flue gas is discharged from the flue gas outlet 603 of the flue gas treatment tower 6;

[0163] S70. When the concentration of the salt substances in the liquid storage area 10 exceeds the set value, transport the waste liquid in the liquid storage area 10 to the waste liquid treatment subsystem 15, and the waste liquid treatment subsystem 15 recycles the salt substances in the waste liquid.

[0164] In the specific implementation process, first execute S30 - S50 to stably form multiple water films in the core processor 7. Then execute S10, S20, S40, S50, S60 and S60 to continuously treat the flue gas. During the treatment process, select to execute S30 according to the content of the treatment agent in the liquid storage area 10. Step S30 includes inputting the alkaline agent into the liquid storage area 10 through the alkaline agent delivery assembly 180, inputting the acidic agent into the liquid storage area 10 through the acidic agent delivery assembly 181, and inputting the aqueous solution in the water tank into the liquid storage area 10 through the water pump.

[0165] Further, at least two treatment plates 3 are arranged in the core processor 7, and the two treatment plates 3 are distributed along the axial direction of the flue gas treatment tower 6;

[0166] By controlling the flow rate of the spray assembly 8, while the absorbent passes through the two treatment plates 3 located below the spray assembly 8, water films are formed on the surfaces of the two treatment plates 3. The flue gas passes through the water film on the lower treatment plate 3 and the water film on the upper treatment plate 3 in sequence, so that the flue gas and the absorbent undergo two full absorption reactions in the core processor 7, thereby improving the effect of flue gas treatment and avoiding excessive resistance to the flue gas.

[0167] Further, the waste liquid in the liquid storage area 10 is transported to the waste liquid treatment subsystem 15, and the waste liquid treatment subsystem 15 recycles the salt substances in the waste liquid, including:

[0168] The waste liquid in the liquid storage area 10 is transported to the water treatment module 150, and the water treatment module 150 purifies the waste liquid. The treated purified water is returned to the flue gas treatment tower 6 to obtain the treated concentrated brine containing salt.

[0169] The concentrated brine containing salt is transported to the buffer tank 151 for buffering.

[0170] The concentrated brine containing salt in the buffer tank 151 is transported to the decomposition furnace 153 for recycling; and / or,

[0171] The concentrated brine containing salt in the buffer tank 151 is transported to the grate cooler 152 for recycling.

[0172] Further, transporting the concentrated brine containing salt in the buffer tank 151 to the decomposition furnace 153 for recycling includes:

[0173] The concentrated brine containing salt is transported to the decomposition furnace 153. In a high-temperature environment, ammonium sulfate in the concentrated brine containing salt is decomposed into sulfate radicals and ammonia. The sulfate radicals react with calcium oxide decomposed from calcium carbonate (limestone) in the decomposition furnace 153 to form calcium sulfate, and the ammonia reacts with nitrogen oxides in the furnace for denitrification, thereby achieving the purpose of saving ammonia water.

[0174] Further, transporting the concentrated brine containing salt in the buffer tank 151 to the grate cooler 152 for recycling includes:

[0175] The concentrated brine containing salt is transported to the high-temperature section of the grate cooler 152. In a high-temperature environment, ammonium sulfate in the concentrated brine containing salt is decomposed into sulfate radicals and ammonia. The sulfate radicals react with calcium oxide on the surface of the clinker in the grate cooler 152 to form calcium sulfate;

[0176] The ammonia then enters the kiln and furnace with the secondary and tertiary air for denitrification, also achieving the saving of ammonia water.

[0177] Specifically, in one embodiment, the above flue gas denitrification process can be used in conjunction with the decomposition furnace and the grate cooler during the cement production process. It should be noted that the decomposition furnace is the place where limestone (mainly calcium carbonate) in the cement raw meal decomposes. The decomposition products are calcium oxide (CaO) and CO2. CaO enters the kiln through the five-stage cylinder and undergoes high-temperature reaction to form cement clinker, while CO2 rises with the flue gas and is discharged externally. In addition, cement clinker is alkaline, with a CaO content of about 64%. Therefore, it will naturally react with sulfate to form calcium sulfate when encountering sulfate. When cooperating with the grate cooler, the front end of the grate cooler is the high-temperature section. The cooling air in this section (becoming high-temperature air at about 1100°C after cooling the clinker) is used for the combustion air of the coal in the kiln and the decomposition furnace. The air entering the kiln is called secondary air, and the air entering the decomposition furnace is called tertiary air. The so-called primary air is the air used to send coal by the burner at the kiln head and usually comes from the atmosphere.

[0178] Further, a smoke collection subsystem 19 is provided at the top of the flue gas treatment tower 6. The smoke collection subsystem 19 adsorbs the tiny droplets of the flue gas passing through the demisting component 9. The smoke collection subsystem 19 includes a smoke collection hood 190 and an exhaust pipe 193. The smoke collection hood 190 is arranged in a conical shape. A first ventilation port 194 is provided on the smoke collection hood 190. The first ventilation port 194 is connected to the exhaust pipe 193, and the exhaust pipe 193 is communicated with the flue gas outlet 603.

[0179] A second ventilation port 191 is provided on the smoke collection hood 190, and a third ventilation port 192 is provided on the exhaust pipe 193. The second ventilation port 191 and the third ventilation port 192 are connected by a pipeline. The orientation of the third ventilation port 192 deviates from the axis of the exhaust pipe 193.

[0180] The flue gas is divided into two paths from the smoke collection hood 190. The first path enters the exhaust pipe 193 through the first ventilation port 194 and flows upward inside the exhaust pipe 193.

[0181] The second path enters the exhaust pipe 193 tangentially from the exhaust pipe 193 through the second ventilation port 191, the pipeline, and the third ventilation port 192. The self-speed of the flue gas is used to provide a tangential thrust to the flue gas inside the exhaust pipe 193, so that the flue gas as a whole spirally rises inside the exhaust pipe 193. During the spiral rising process, the tiny droplets carried by the flue gas come into contact with the inner wall of the exhaust pipe 193 and adhere to the inner wall.

[0182] Further, during the flue gas treatment process, a part of the liquid in the liquid storage area 10 is circulated between the liquid storage area 10 and the absorption area pit subsystem 16, and the absorption agent after participating in the flue gas treatment is detected through the absorption area pit subsystem 16.

[0183] Further, during the maintenance period, the absorption agent in the liquid storage area 10 is transported to the absorption agent buffer system 17 for buffering, and after the maintenance, the absorption agent in the absorption agent buffer system 17 is transported back to the liquid storage area 10.

[0184] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flue gas denitrification system, characterized in that, Comprising: A flue gas treatment tower, in which a core processor, a spraying assembly, and a demisting assembly are sequentially arranged from bottom to top. A flue gas outlet is provided at the upper end of the flue gas treatment tower, and a flue gas inlet is provided on the flue gas treatment tower. The flue gas inlet is connected to a tail exhaust fan through a pipeline, and the tail exhaust fan is connected to a dust collector through a pipeline. The dust collector is used for dust removal of the flue gas to be treated, and the dust-removed flue gas is input into the flue gas inlet by the tail exhaust fan. A liquid storage area is provided at the lower part of the flue gas treatment tower; The flue gas inlet is located between the core processor and the liquid storage area. Under the action of the spraying assembly, multiple water films can be formed in the core processor. The flue gas and the absorbent sprayed by the spraying assembly converge in the core processor, and the flue gas is deammoniated during the process of passing through the water films; An absorbent circulation subsystem, the first end of which is communicated with the liquid storage area, and the second end is communicated with the spraying assembly, and is used for circulating and transporting the absorbent in the liquid storage area to the spraying assembly and spraying it downward by the spraying assembly; A chemical agent delivery subsystem, which is communicated with the liquid storage area and is used for delivering a treatment chemical agent to the liquid storage area; A waste liquid treatment subsystem, which is communicated with the liquid storage area and is used for recycling and treating waste liquid; An oxygen input subsystem, which is used for inputting oxygen into the flue gas treatment tower to promote the oxidation reaction of substances containing sulfur in the lower valence state in the flue gas treatment tower.

2. The flue gas denitrification system according to claim 1, wherein The core processor includes: A support structure, which is arranged to allow the solution to flow through, and the support structure is fixedly connected to the flue gas treatment tower; Treatment plates, a plurality of which are provided. The plurality of treatment plates are axially arranged on the support structure, and there is a spacing between adjacent treatment plates; A plurality of through holes are provided on the treatment plates, and the aperture and density of the through holes satisfy that the sum of the solution flow rates allowed to pass through the plurality of through holes under the non-pressure state per unit time is less than the solution flow rate flowing to the treatment plate where the through holes are located per unit time, so that during the flue gas treatment process, a water film with a certain thickness can be formed on the upper surface of the treatment plate.

3. The flue gas denitrification system according to claim 1, characterized in that The waste liquid treatment subsystem includes: A water treatment module, which is used for receiving the waste liquid discharged from the liquid storage area and purifying the waste liquid. The treated purified water returns to the flue gas treatment tower, and the treated concentrated salt water is transported to the next level; A buffer tank, which is connected to the water treatment module and is used for receiving the treated concentrated salt water and transporting it to the next level respectively; A decomposition furnace, which is connected to the buffer tank and is used for receiving part of the concentrated salt water in the buffer tank and recycling it; A grate cooler, which is connected to the buffer tank and is used for receiving part of the concentrated salt water in the buffer tank and recycling it.

4. The flue gas denitrification system according to claim 1, wherein, The oxygen input subsystem includes an oxidation blower. An oxygen inlet is provided on the flue gas treatment tower, and the oxygen inlet is located below the flue gas inlet. The oxidation blower is connected to the oxygen inlet and is used to input oxygen from the oxygen inlet into the flue gas treatment tower to promote the oxidation reaction of substances containing sulfur in sub-valent state in the flue gas treatment tower.

5. The flue gas denitrification system according to claim 1, wherein It further includes an absorption zone sump subsystem, which is connected to the liquid storage zone and is used to pump out the absorbent after participating in flue gas treatment from the liquid storage zone, transport the pumped absorbent back to the liquid storage zone, and detect the absorbent after participating in flue gas treatment through the absorption zone sump subsystem.

6. The flue gas deammoniation system according to claim 1, characterized in that, It further includes an absorbent buffer system, which is used to buffer the absorbent in the liquid storage zone during maintenance and transport the buffered absorbent back into the liquid storage zone.

7. The flue gas denitrification system according to claim 1, characterized in that, The chemical agent delivery subsystem includes: An alkaline chemical agent delivery component for inputting alkaline chemical agent into the liquid storage zone; An acidic chemical agent delivery component for inputting acidic chemical agent into the liquid storage zone.

8. The flue gas denitrification system according to claim 1, characterized in that, The spray component includes a first spray head, a second spray head, and a third spray head arranged successively from top to bottom. The spray ranges of the first spray head, the second spray head, and the third spray head intersect and jointly cover the central processing unit. The absorbent circulation subsystem includes a first circulation pump, a second circulation pump, and a third circulation pump. The two ends of the first circulation pump are respectively connected to the liquid storage zone and the first spray head. The two ends of the second circulation pump are respectively connected to the liquid storage zone and the second spray head. The two ends of the third circulation pump are respectively connected to the liquid storage zone and the third spray head.

9. The flue gas denitrification system according to claim 1, wherein It further includes a smoke collection subsystem, which is arranged at the upper part of the flue gas treatment tower and is communicated with the flue gas outlet. The smoke collection subsystem is used to collect the gas containing droplets after flue gas treatment and perform gas-liquid separation on the gas containing droplets. The separated gas is discharged from the flue gas outlet.

10. The flue gas denitrification system according to claim 9, characterized in that, The smoke collection subsystem includes a smoke collection hood and an exhaust pipe. The smoke collection hood is arranged in a conical shape. A first ventilation port is provided on the smoke collection hood, and the first ventilation port is connected to the exhaust pipe. The exhaust pipe is communicated with the flue gas outlet. A second ventilation port is provided on the smoke collection hood, and a third ventilation port is provided on the exhaust pipe. The second ventilation port and the third ventilation port are connected by a pipeline. The orientation of the third ventilation port deviates from the axis of the exhaust pipe, so that the gas discharged from the third ventilation port enters the exhaust pipe tangentially from the exhaust pipe, causing the gas in the exhaust pipe to rise in a cyclone manner and perform gas-liquid separation.

Images