A flue gas treatment device

Abstract

The present invention provides a flue gas treatment device, comprising: a shell and a first material stop structure, a second material stop structure and a third material stop structure arranged in sequence along the radial direction of the shell, the first material stop structure, the second material stop structure and the third material stop structure divide the shell into an air inlet chamber, a first flue gas treatment chamber, a second flue gas treatment chamber and an air outlet chamber which are connected in sequence along the radial direction, the air inlet chamber is provided with a flue gas inlet, the air outlet chamber is provided with a flue gas outlet, the top of the first flue gas treatment chamber and the second flue gas treatment chamber are both provided with a feed port, and the bottom is both provided with a discharge port; the second material stop structure comprises a plurality of second grid plates arranged in sequence along the axis direction of the shell, and the second grid plates are in the form of a folded plate structure bent along the arrangement direction of the first flue gas treatment chamber and the second flue gas treatment chamber. The flue gas treatment device has a large ventilation area, a small air resistance through the bed, a strong flue gas treatment capacity, and a compact structure of the entire device, which saves floor space and investment.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, and in particular to a flue gas treatment device. Background Art

[0002] Flue gas treatment mainly includes dust removal, desulfurization, denitrification and other processes. The dust removal processes mainly include wet dust removal, bag dust removal, electrostatic precipitator, bag electrostatic composite dust removal, etc. The desulfurization processes mainly include dry method, semi-dry method, wet method, etc. The dust removal device, desulfurization device and denitrification device in flue gas treatment are often independent devices connected by air ducts, occupying a large area, high processing cost and inconvenient use. In addition, for devices that use solid agent layers to treat flue gas, the area that first contacts the flue gas will fail first while the area that contacts later still has a certain activity, resulting in some of the solids not failing when discharged, resulting in high operating costs, waste of resources and low processing efficiency. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the flue gas treatment device in the prior art, such as large footprint, high treatment cost, inconvenience in use, low treatment efficiency and waste of resources, so as to provide a new type of flue gas treatment device.

[0004] A flue gas treatment device comprises: a shell, and a first material stopper structure, a second material stopper structure and a third material stopper structure arranged in sequence along the radial direction of the shell,

[0005] The first material blocking structure, the second material blocking structure and the third material blocking structure divide the shell into an air inlet chamber, a first smoke treatment chamber, a second smoke treatment chamber and an air outlet chamber which are connected in sequence along the radial direction.

[0006] The air inlet chamber is provided with a smoke inlet, the air outlet chamber is provided with a smoke outlet, the first smoke treatment chamber and the second smoke treatment chamber are both provided with a feed inlet at the top and a discharge outlet at the bottom;

[0007] The second material blocking structure includes a plurality of second grid plates arranged in sequence along the axial direction of the shell, and the second grid plates are folded plate structures bent along the arrangement direction of the first smoke treatment chamber and the second smoke treatment chamber.

[0008] Furthermore, the second material-blocking structure includes a plurality of second material-blocking components sequentially connected and arranged along the axis direction of the shell, the second material-blocking component includes a second component frame and the second grid plate, and the second grid plate is arranged in the second component frame.

[0009] Furthermore, the second grid plate is in an inverted V shape.

[0010] Furthermore, the first material blocking structure includes a plurality of first grid plates sequentially arranged along the axial direction of the shell, and the plurality of first grid plates are inclined downward toward the inside of the first flue gas treatment chamber.

[0011] Furthermore, the first material-blocking structure includes a plurality of first material-blocking components sequentially connected and arranged along the axis direction of the shell, the first material-blocking component includes a first component frame and the first grid plate, and the first grid plate is arranged in the first component frame.

[0012] Furthermore, the third material blocking structure includes a plurality of third grid plates sequentially arranged along the axial direction of the shell, and the plurality of third grid plates are inclined downward toward the inside of the second flue gas treatment chamber.

[0013] Furthermore, the third material-blocking structure includes a plurality of third material-blocking components sequentially connected and arranged along the axis direction of the shell, and the third material-blocking component includes a third component frame and the third grid plate, and the third grid plate is arranged in the third component frame.

[0014] Further, along the radial direction of the shell, the width of the first flue gas treatment chamber is smaller than that of the second flue gas treatment chamber.

[0015] Furthermore, the shell is in the shape of a cuboid.

[0016] Furthermore, the flue gas treatment device comprises at least two groups of the air inlet chamber, the first smoke treatment chamber and the second smoke treatment chamber, and the second smoke treatment chamber in at least two groups of the air inlet chamber, the first smoke treatment chamber and the second smoke treatment chamber are all connected to the same air outlet chamber.

[0017] Furthermore, the first flue gas treatment chamber and the second flue gas treatment chamber are filled with flue gas desulfurizer, which includes the following raw materials by weight: 30 to 60 parts of slaked lime powder, 20 to 60 parts of microsilica powder, 6 to 24 parts of binder, and 6 to 15 parts of crystalline hydrated salt.

[0018] Furthermore, the binder comprises, by weight, 2 to 9 parts of cement and 4 to 15 parts of clay.

[0019] Furthermore, the clay includes at least one of kaolinite, montmorillonite, illite and chlorite.

[0020] Furthermore, the crystalline hydrated salt includes at least one of hydrated sulfate, hydrated hydrochloride, and hydrated carbonate.

[0021] Furthermore, the hydrated sulfate includes at least one of hydrated sodium sulfate, hydrated magnesium sulfate, hydrated calcium sulfate, hydrated ferrous sulfate, hydrated cupric sulfate, hydrated zinc sulfate, hydrated hydrated aluminum sulfate, and hydrated potassium aluminum sulfate; the hydrated hydrochloride includes at least one of hydrated calcium chloride and hydrated ferric chloride; the hydrated carbonate includes at least one of hydrated sodium carbonate and hydrated potassium carbonate.

[0022] Furthermore, the flue gas desulfurizer has a bulk density of 0.5 to 0.8 g / cm3, a radial crushing strength of 120 to 280 N / cm, and a porosity of 40 to 65%.

[0023] Furthermore, the preparation method of the flue gas desulfurization agent comprises:

[0024] The slaked lime powder, microsilica powder, binder and crystallized hydrated salt are mixed uniformly to obtain a mixed powder;

[0025] Adding water to the mixed powder, stirring, and extruding to obtain a molded material;

[0026] The molding material is sequentially subjected to heat preservation, roasting and cooling to obtain the flue gas desulfurization agent.

[0027] Furthermore, the amount of water added to the mixed powder is 30% to 60% of the weight of the mixed powder, and the stirring is sealed stirring in a mixing device for 10 to 30 minutes.

[0028] Furthermore, the heat preservation is heat preservation at 30-100° C. for 4-20 hours.

[0029] Furthermore, the calcination is carried out at 200-300° C. for 2-6 hours.

[0030] The technical solution of the present invention has the following advantages:

[0031] 1. In the flue gas treatment device provided by the present invention, the first flue gas treatment chamber and the second flue gas treatment chamber are connected by a second material blocking structure, so that the first flue gas treatment chamber and the second flue gas treatment chamber are closely connected. The second grid plate with a folded plate structure plays a clamping role for the agent layers on both sides on the one hand, and forms an airway between adjacent second grid plates on the other hand, with a large ventilation area, which reduces the air resistance through the bed, has a strong flue gas treatment capacity, makes the entire device compact, saves floor space, and saves investment; by setting the first flue gas treatment chamber and the second flue gas treatment chamber, a solid agent, such as a desulfurizer, is filled in through the feed port located at the top to form two desulfurizer layers, and the flue gas flows through When the desulfurizer layer in the first flue gas treatment chamber is formed, the solid desulfurizer will adsorb the dust in the flue gas and remove some of the sulfur oxides in the flue gas. When the flue gas enters the second flue gas treatment chamber, the remaining sulfur oxides in the flue gas will be removed, thereby realizing the integration of flue gas dust removal and desulfurization. The desulfurization process is carried out in the two flue gas treatment chambers in sequence. Both flue gas treatment chambers are provided with a feed port and a discharge port, and the discharge control is flexible, so that the desulfurizer in the first flue gas treatment chamber that fails first can be replaced quickly, and the desulfurizer in the second flue gas treatment chamber that fails later can slow down the replacement speed, avoiding the waste of non-expired desulfurizers during the overall replacement and improving the desulfurization efficiency.

[0032] 2. The flue gas treatment device provided by the present invention can fill the waste agent in the second flue gas treatment chamber into the first flue gas treatment chamber after the flue gas treatment device has been running for a period of time, so as to make full use of the unexpired desulfurizer and increase the utilization rate of the desulfurizer; the dry desulfurization process is used, the desulfurization process is simple, there is no sewage and dirty acid treatment problem, the energy consumption is low, and the temperature of the flue gas after treatment is relatively high, which is beneficial to the subsequent denitrification process and waste heat recovery and flue gas emission, does not require secondary heating, and has low corrosiveness.

[0033] 3. The flue gas treatment device provided by the present invention comprises a first retaining structure comprising a plurality of first grid plates arranged in sequence along the axial direction of the shell, and a third retaining structure comprising a plurality of third grid plates arranged in sequence along the axial direction of the shell. The three retaining structures play the role of clamping the solid agent on the one hand, and play the role of evenly arranging the flue gas on the other hand. When the flue gas flows through the gaps between the grid plates, it also plays a certain dust removal role. The grid plates rectify the flue gas and redistribute the gas entering the flue gas treatment chamber, thereby increasing the flue gas treatment efficiency. Both sides of the flue gas treatment chamber are retaining structures with a large ventilation area, which further reduces the air resistance through the bed and enhances the flue gas treatment capacity. The structure of the entire device is more compact, saving floor space and investment.

[0034] 4. In the flue gas treatment device provided by the present invention, when the first material blocking structure, the second material blocking structure and the third material blocking structure include several material blocking components, a modular design of the material blocking structure is realized, which not only can improve the rigidity of the material blocking component and prevent it from being deformed after being loaded, but also facilitates processing and manufacturing, improves work efficiency and reduces processing costs.

[0035] 5. The flue gas treatment device provided by the present invention controls the width of the first flue gas treatment chamber to be smaller than that of the second flue gas treatment chamber in the radial direction of the shell, and utilizes the gravity of the agent layer to make the thinner agent layer in the first flue gas treatment chamber replace faster, and the thicker agent layer in the second flue gas treatment chamber replace slower, which is beneficial to the rapid replacement of the desulfurization agent that fails first, increases the utilization rate of the desulfurization agent, and improves the desulfurization efficiency.

[0036] 6. The shell of the flue gas treatment device provided by the present invention is in the form of a rectangular parallelepiped, which can be easily tightly connected with other flue gas treatment devices (such as a denitrification device), has a compact layout, and saves floor space.

[0037] 7. The smoke treatment device provided by the present invention comprises at least two groups of first smoke treatment chambers, second smoke treatment chambers and air outlet chambers. At least two groups of first smoke treatment chambers, second smoke treatment chambers and the first smoke treatment chambers in the air outlet chambers are connected to the same air outlet chamber. This structure reduces the number of air outlet chambers and makes the device structure more compact. Multiple groups of first smoke treatment chambers and second smoke treatment chambers work at the same time, increasing the processing capacity of the smoke treatment device.

[0038] 8. The flue gas treatment device provided by the present invention has a first flue gas treatment chamber and a second flue gas treatment chamber filled with a flue gas desulfurizer, wherein the flue gas desulfurizer uses calcium hydroxide in slaked lime powder as an active component, microsilica powder as a carrier, and a binder and a crystalline hydrated salt as auxiliary agents, wherein calcium hydroxide has a strong alkalinity, and microsilica powder contains a large amount of silicon dioxide, which can react with calcium hydroxide to produce a volcanic ash reaction, and the generated product hydrated silicate has a strong adsorption performance and strength, and can react chemically with SO2; the binder plays a role in enhancing the bonding The flue gas desulfurizer can be formed under a lower pressure to avoid the flue gas desulfurizer being too compact and reducing the porosity due to excessive pressure; the addition of crystalline hydrated salt can increase the pore structure in the flue gas desulfurizer by losing crystal water during the preparation of the flue gas desulfurizer, expand the pore volume and pore capacity of the flue gas desulfurizer, allow the flue gas to enter the flue gas desulfurizer to react, increase the reaction sites, and the crystalline hydrated salt and the salt after losing crystal water catalyze the desulfurization reaction, further improving the utilization rate and desulfurization efficiency of the flue gas desulfurizer.

[0039] The reaction equation of the volcanic ash reaction is as follows:

[0040] Ca(OH) m +SiO2+H2O→(CaO) x (SiO2) y (H2O) z .

[0041] The reaction equation for the chemical reaction between hydrated silicate and SO2 is as follows:

[0042] (CaO)x (SiO2) y (H2O) z +SO2→(CaO) x (SiO2) y (CaSO3) z (H2O) w .

[0043] 9. The flue gas treatment device provided by the present invention has a first flue gas treatment chamber and a second flue gas treatment chamber filled with a flue gas desulfurizer, and the active substances in the slaked lime powder and the microsilica powder undergo a volcanic ash reaction to generate high-strength hydrated silicates, the binder can bond the various raw material components to increase the strength of the flue gas desulfurizer, and the crystalline hydrated salt plays a pore-forming role in the flue gas desulfurizer by losing crystal water. The various components cooperate with each other to make the flue gas desulfurizer have a smaller bulk density (0.5-0.8 g / cm3), a higher radial crushing strength (120-280 N / cm), and a larger porosity (40-65%). The flue gas desulfurizer is filled in the first flue gas treatment chamber and the second flue gas treatment chamber to form a fixed bed or a moving bed, which is suitable for the purification of industrial flue gas or waste gas containing SO2 at 20-330°C, has the dual functions of dust removal and desulfurization, realizes the integration of dust removal and desulfurization, has higher reaction activity in application, especially under higher flue gas temperature conditions, it still has strong crushing resistance, is not easy to pulverize, and has a low bed pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A schematic structural diagram of a flue gas treatment device provided in one embodiment of the present invention;

[0046] Figure 2 A top view of a flue gas treatment device provided in one embodiment of the present invention;

[0047] Figure 3 This is a schematic structural diagram of the first material blocking assembly used in the present invention;

[0048] Figure 4 This is a schematic structural diagram of a second material blocking assembly used in the present invention;

[0049] Figure 5 This is a schematic structural diagram of the third material blocking assembly used in the present invention.

[0050] Description of reference numerals:

[0051] 1-shell; 2-air inlet chamber; 3-first smoke treatment chamber; 4-second smoke treatment chamber; 5-air outlet chamber; 6-smoke inlet; 7-smoke outlet; 8-feed port; 9-discharge port; 10-first material blocking structure; 11-second material blocking structure; 12-third material blocking structure; 13-first material blocking assembly; 14-first assembly frame; 15-first grid plate; 16-second material blocking assembly; 17-second assembly frame; 18-second grid plate; 19-third material blocking assembly; 20-third assembly frame; 21-third grid plate. DETAILED DESCRIPTION

[0052] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0056] like Figure 1 and Figure 2As shown, the present invention provides a flue gas treatment device, comprising: a shell 1 and a first material blocking structure 10, a second material blocking structure 11 and a third material blocking structure 12 arranged in sequence along the radial direction of the shell 1, the first material blocking structure 10, the second material blocking structure 11 and the third material blocking structure 12 radially divide the shell 1 into an air inlet chamber 2, a first flue gas treatment chamber 3, a second flue gas treatment chamber 4 and an air outlet chamber 5 which are connected in sequence, the air inlet chamber 2 is provided with a flue gas inlet 6, the air outlet chamber 5 is provided with a flue gas outlet 7, the tops of the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are both provided with a feed port 8, and the bottoms are both provided with a discharge port 9; the second material blocking structure 11 comprises a plurality of second grid plates 18 arranged in sequence along the axial direction of the shell 1, and the second grid plates 18 are in the form of a folded plate structure which is bent along the arrangement direction of the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4.

[0057] The flue gas enters from the flue gas inlet 6 on the air inlet chamber 2, flows through the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 in sequence for flue gas treatment, and is then discharged from the air outlet chamber 5. By setting the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4, a solid agent, such as a desulfurizer, is filled from the feed port 8 located at the top to form two desulfurizer layers, and the waste agent is discharged from the discharge port 9 at the bottom. When the flue gas flows through the desulfurizer layer in the first flue gas treatment chamber 3, the dust in the flue gas will be adsorbed by the solid desulfurizer, and part of the sulfur oxides in the flue gas will be removed. When the flue gas enters the second flue gas treatment chamber 4, the remaining sulfur oxides in the flue gas will be removed, thereby realizing the integration of flue gas dust removal and desulfurization, saving the floor space of the device, saving the processing cost, requiring less investment, and having low operating costs.

[0058] The desulfurization process is carried out in two flue gas treatment chambers in sequence. Both flue gas treatment chambers are provided with a feed port 8 and a discharge port 9. The discharge control is flexible. The desulfurizer can enter the flue gas treatment chamber continuously or intermittently from the feed port according to the sulfur content of the flue gas. The desulfurizer in the first flue gas treatment chamber 3 that fails first can be replaced quickly, while the desulfurizer in the second flue gas treatment chamber 4 that fails later can be replaced at a slower speed, thereby avoiding the waste of non-expired desulfurizers during overall replacement and improving the desulfurization efficiency.

[0059] After the flue gas treatment device has been running for a period of time, the waste agent in the second flue gas treatment chamber 4 can be filled into the first flue gas treatment chamber 3, such as by connecting the discharge port 9 of the second flue gas treatment chamber 4 with the feed port 8 of the first flue gas treatment chamber 3 through a hoist, so as to make full use of the unexpired desulfurizer and increase the utilization rate of the desulfurizer; by using the dry desulfurization process, the desulfurization process is simple, there is no sewage and dirty acid treatment problem, the energy consumption is low, and the temperature of the flue gas after treatment is relatively high, which is beneficial to the subsequent denitrification process, waste heat recovery and flue gas emission, does not require secondary heating, and has low corrosiveness.

[0060] The first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are connected by the second blocking structure 11, so that the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are closely connected. The second grid plate 18 with a folded plate structure plays a clamping role on the two side agent layers on the one hand, and forms an airway between adjacent second grid plates 18 on the other hand, with a large ventilation area, which reduces the air resistance through the bed and has a strong flue gas treatment capacity, making the entire device compact in structure, saving floor space and investment.

[0061] The present invention does not limit the type of solid agent filled in the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4. For example, the first flue gas treatment chamber 3 can be filled with a dust removal adsorbent or a desulfurizer, and the desulfurizer can be a new agent or a waste agent. The second flue gas treatment chamber 4 can be filled with a desulfurizer or a denitrifier, etc. The following embodiments are all described in detail by taking the filling of the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 with a desulfurizer as an example. The loading and discharging states in the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 can be controlled as needed to form a fixed bed or a moving bed. The filling and discharging can be continuous or intermittent, and both can be reasonably selected according to actual conditions. In addition, the flue gas treatment device provided by the present invention may also include a third flue gas treatment chamber located between the second flue gas treatment chamber 4 and the gas outlet chamber 5, etc., that is, the number of flue gas treatment chambers can be two or more, all within the scope of protection requested by the present invention.

[0062] The present invention does not limit the shapes and positions of the smoke inlet 6, the smoke outlet 7, the feed port 8 and the discharge port 9. Preferably, Figure 1 and Figure 2 As shown, the smoke inlet 6, the smoke outlet 7, the feed port 8 and the discharge port 9 are all opened on the shell 1, the smoke inlet 6 is located near the bottom of the air inlet chamber 2, the smoke outlet 7 is located near the top of the air outlet chamber 5 and at the top of the air outlet chamber 5, the feed port 8 is respectively opened at the top of the shell 1 corresponding to the first smoke treatment chamber 3 and the second smoke treatment chamber 4, and the discharge port 9 is respectively opened on the bottom of the shell 1 on the discharge cone corresponding to the first smoke treatment chamber 3 and the second smoke treatment chamber 4.

[0063] As an optional embodiment of the present invention, the second grid plate 18 is in a folded line shape, a groove shape, an inverted V shape, etc. Preferably, the second grid plate 18 is in an inverted V shape. The second grid plate 18 can be directly mounted on the side wall of the housing, or fixed by other fixing structures. Preferably, the second material stop structure includes a plurality of second material stop components sequentially connected and arranged along the axis direction of the housing, such as Figure 4 As shown, the second material blocking assembly includes a second assembly frame and a second grid plate, and the second grid plate is arranged in the second assembly frame.

[0064] As an optional embodiment of the present invention, the first material blocking structure 10 includes a plurality of first grid plates 15 arranged in sequence along the axial direction of the shell 1, and the plurality of first grid plates 15 are arranged downwardly tilted toward the inside of the first flue gas treatment chamber 3; the third material blocking structure 12 includes a plurality of third grid plates 21 arranged in sequence along the axial direction of the shell 1, and the plurality of third grid plates 21 are arranged downwardly tilted toward the inside of the second flue gas treatment chamber 4. The first grid plates 15 and the third grid plates 21 can be directly mounted on the side wall of the shell, or fixed by other fixing structures. Preferably, the first material blocking structure 10 includes a plurality of first material blocking components 13 arranged in sequence along the axial direction of the shell 1, such as Figure 3 As shown, the first material blocking assembly 13 includes a first assembly frame 14 and a plurality of first grid plates 15 arranged in the first assembly frame 14, and the plurality of first grid plates 15 are arranged downwardly and tilted toward the inside of the first flue gas treatment chamber 3; the third material blocking structure 12 includes a plurality of third material blocking assemblies 19 arranged in sequence along the axis direction of the shell, as shown in FIG. Figure 5 As shown, the third material blocking assembly 19 includes a third assembly frame 20 and a third grid plate 21 disposed in the third assembly frame 20 , and the third grid plate 21 is disposed to be tilted downward toward the inside of the second flue gas treatment chamber 4 .

[0065] The three retaining structures (the first retaining structure 10, the second retaining structure 11 and the third retaining structure 12) play the role of clamping the solid dosage form on the one hand, and evenly arranging the flue gas on the other hand. The retaining structures are provided on both sides of the flue gas treatment chamber, and the ventilation area is large, which reduces the air resistance through the bed and has a strong flue gas treatment capacity, making the entire device compact in structure, saving floor space and investment.

[0066] By setting up the component frame and the grid plate, the flue gas enters and exits from the gaps between the grid plates. When the flue gas flows through the gaps between the grid plates, it also plays a certain dust removal role. The grid plate rectifies the flue gas, so that the gas entering the flue gas treatment chamber is redistributed, and the flue gas treatment efficiency is increased. In particular, the second grid plate 18 of the second retaining assembly 16 is in an inverted V shape, half of which is used to form a clamping assembly for clamping the desulfurizer with the first grid plate 15, and the other half is used to form a clamping assembly for clamping the desulfurizer with the third grid plate 21, so that the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are closely connected, with a compact structure, which greatly saves the floor space of the device, and at the same time increases the flue gas treatment efficiency by rectifying the flue gas. More preferably, the first grid plate 15, the second grid plate 18, and the third grid plate 21 are arranged at equal intervals to make the flue gas distribution more uniform, further increase the flue gas treatment efficiency, and reduce the airflow resistance.

[0067] When multiple material retaining components are included, a modular design of the material retaining structure is realized, which can not only improve the rigidity of the material retaining component, but also prevent deformation after loading, and facilitate processing and manufacturing, improve work efficiency, and reduce processing costs. The two ends of the first grid plate 15 and the third grid plate 21 along the air intake direction can be bent in opposite directions to form upright sections, which not only improves the rigidity of the grid plate, but also prevents the desulfurizer from falling off.

[0068] As a preferred embodiment of the present invention, along the radial direction of the shell 1, the width of the first flue gas treatment chamber 3 is smaller than that of the second flue gas treatment chamber 4. When the specifications of the discharge ports 9 of the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are the same, the gravity of the agent layer is utilized to make the thinner agent layer in the first flue gas treatment chamber 4 replace faster, and the thicker agent layer in the second flue gas treatment chamber 5 replace slower, which is conducive to the rapid replacement of the first failed desulfurizer and the slow replacement of the later failed desulfurizer, thereby increasing the utilization rate of the desulfurizer and improving the desulfurization efficiency. In addition, the difference in the replacement speed of the desulfurizer in the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 can also be formed by external force control or changes in the specifications of the discharge ports, all of which are within the scope of protection requested by the present invention.

[0069] The present invention does not limit the shape of the housing 1. As a preferred embodiment of the present invention, the housing 1 is a rectangular parallelepiped. The housing 1 is a rectangular parallelepiped, which is easy to be closely connected with other flue gas treatment devices (such as denitrification devices), compactly arranged, and saves floor space.

[0070] As a preferred embodiment of the present invention, the smoke treatment device includes at least two groups of air inlet chambers 2, a first smoke treatment chamber 3 and a second smoke treatment chamber 4, and the second smoke treatment chambers 4 in at least two groups of air inlet chambers 2, the first smoke treatment chamber 3 and the second smoke treatment chamber 4 are all connected to the same air outlet chamber 5. As another preferred embodiment of the present invention, the smoke treatment device includes at least two groups of first smoke treatment chambers 3, the second smoke treatment chamber 4 and the air outlet chamber 5, and the first smoke treatment chamber 3 in at least two groups of first smoke treatment chambers 3, the second smoke treatment chamber 4 and the air outlet chambers are all connected to the same air inlet chamber 2. The above structure reduces the air outlet chamber / air inlet chamber, making the device structure more compact, and multiple groups of first smoke treatment chambers and second smoke treatment chambers work simultaneously, increasing the processing capacity of the smoke treatment device.

[0071] like Figure 1 and Figure 2 As shown, the smoke treatment device includes two groups of air inlet chambers 2, a first smoke treatment chamber 3 and a second smoke treatment chamber 4, and the second smoke treatment chambers 4 in both groups are connected to the air outlet chamber 5. This design can save one air outlet chamber 5, the structure is more compact, and multiple smoke treatment units are connected in parallel, with high smoke treatment efficiency and processing capacity.

[0072] like Figure 1The working principle of the flue gas treatment device shown is as follows: the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are filled with desulfurizer, both of which are filled in from the top feed port 8, and the waste agent is discharged from the discharge port 9 to form two moving beds of desulfurizer. The flue gas enters the air intake chamber 2 from the flue gas inlet 6 on the air intake chamber 2, enters the first flue gas treatment chamber 3 through the gap between the first grid plates 15, dust is removed and pre-desulfurized in the first flue gas treatment chamber 3, and the flue gas further enters the second flue gas treatment chamber 4 through the gap between the second grid plates 18, and is further desulfurized in the second flue gas treatment chamber 4. The flue gas then enters the air outlet chamber 5 through the gap between the third grid plates 21, and the treated flue gas is discharged from the smoke outlet 7 on the air outlet chamber 5.

[0073] As a preferred embodiment of the present invention, the first flue gas treatment chamber and the second flue gas treatment chamber are filled with a flue gas desulfurizer, and the flue gas desulfurizer includes the following raw materials by weight: 30-60 parts of slaked lime powder, 20-60 parts of microsilica powder, 6-24 parts of binder, and 6-15 parts of crystalline hydrated salt. Preferably, by weight, the binder includes: 2-9 parts of cement and 4-15 parts of clay.

[0074] As an optional embodiment of the present invention, two groups of first smoke treatment chambers and second smoke treatment chambers are provided in the shell, and specific implementation parameters of the smoke treatment device are shown in Table 1.

[0075] Table 1 Specific implementation parameters of flue gas treatment device

[0076]

[0077] The shell width in Table 1 refers to the width of the shell in the direction in which the air inlet chamber, the first smoke treatment chamber, the second smoke treatment chamber and the air outlet chamber are arranged; the first smoke treatment chamber width / the second smoke treatment chamber width refers to the width of the first smoke treatment chamber / the second smoke treatment chamber in the direction in which the air inlet chamber, the first smoke treatment chamber, the second smoke treatment chamber and the air outlet chamber are arranged.

[0078] The specific implementation of the flue gas treatment device provided by the present invention is given below:

[0079] Example 1

[0080] like Figure 1 and Figure 2A flue gas treatment device is shown, comprising: a shell 1 and a first material stop structure 10, a second material stop structure 11, and a third material stop structure 12 arranged in sequence along the radial direction of the shell 1, and another group of first material stop structures 10, second material stop structures 11, and third material stop structures 12 are symmetrically arranged along the central axis of the shell 1, dividing the shell 1 radially into an air intake chamber 2, a first flue gas treatment chamber 3, a second flue gas treatment chamber 4, an air outlet chamber 5, a second flue gas treatment chamber 4, a first flue gas treatment chamber 3, and an air intake chamber 2 that are connected in sequence, a flue gas inlet 6 is arranged on the air intake chamber 2, a flue gas outlet 7 is arranged on the air outlet chamber 5, and a feed port 8 is arranged on the top of the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4, and a discharge port 9 is arranged on the bottom. The first material stop structure 10 includes a plurality of first material stop components 13 arranged in sequence along the axial direction of the shell 1, as shown in FIG. Figure 3 As shown, the first material blocking assembly 13 includes a first assembly frame 14 and a plurality of first grid plates 15 arranged in the first assembly frame 14, and the plurality of first grid plates 15 are arranged to be tilted downward toward the inside of the first flue gas treatment chamber 3; the second material blocking structure includes a plurality of second material blocking assemblies sequentially connected and arranged along the axis direction of the shell, such as Figure 4 As shown, the second material stopper assembly includes a second assembly frame and a second grid plate, the second grid plate is arranged in the second assembly frame, and the second grid plate 18 is inverted V-shaped; the third material stopper structure 12 includes a plurality of third material stopper assemblies 19 arranged in sequence along the axis direction of the shell, such as Figure 5 As shown, the third material blocking assembly 19 includes a third assembly frame 20 and a third grid plate 21 disposed in the third assembly frame 20 , and the third grid plate 21 is disposed to be tilted downward toward the inside of the second flue gas treatment chamber 4 .

[0081] The specific implementation parameters of the flue gas treatment device are as follows: Flue gas treatment capacity 200000Nm 3 / h, shell length 12000mm, shell width 8000mm, flue gas desulfurization agent filling height 15600mm, first flue gas treatment chamber width 600mm, second flue gas treatment chamber width 900mm.

[0082] The first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are both filled with flue gas desulfurizers, and the raw materials thereof are as follows: 30 kg slaked lime powder, 20 kg microsilica powder, 2 kg cement, 2 kg kaolinite, 2 kg montmorillonite, 3 kg sodium sulfate decahydrate, and 3 kg calcium chloride dihydrate.

[0083] The preparation method of the flue gas desulfurizer is as follows:

[0084] Put all the above raw materials into a mixing device and mix them evenly to obtain a mixed powder; add 30% water by weight of the mixed powder to the mixed powder, seal and stir in the mixing device for 20 minutes, and extrude and mold using hydraulic equipment to obtain a molded material; place the molded material in a sealed insulation box at 50°C and keep it warm for 5 hours; take out the molded material from the sealed insulation box and roast it at 300°C for 2 hours, take it out and air it to room temperature to obtain a granular flue gas desulfurizer product with a particle size of 6 to 8 mm.

[0085] Example 2

[0086] The present embodiment provides a flue gas treatment device, which differs from Embodiment 1 only in that the flue gas desulfurizers filled in the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are different: the raw materials of the flue gas desulfurizer are as follows: 40 kg of slaked lime powder, 40 kg of microsilica powder, 9 kg of cement, 10 kg of illite, 5 kg of chlorite, and 15 kg of sodium carbonate decahydrate.

[0087] The preparation method of the flue gas desulfurizer is as follows: all the above raw materials are put into a mixing device and mixed evenly to obtain a mixed powder; 50% of the weight of water is added to the mixed powder, and after sealed stirring in the mixing device for 30 minutes, a hydraulic device is used for extrusion molding to obtain a molded material; the molded material is placed in a sealed insulation box at 30°C and kept warm for 20 hours; the molded material is taken out of the sealed insulation box and roasted at 200°C for 6 hours, taken out and aired to room temperature to obtain a cylindrical strip flue gas desulfurizer finished product with a diameter of 6-8mm.

[0088] Example 3

[0089] The present embodiment provides a flue gas treatment device, which differs from Embodiment 1 only in that the flue gas desulfurizers filled in the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are different: the raw materials of the flue gas desulfurizer are as follows: 60 kg of slaked lime powder, 60 kg of microsilica powder, 5 kg of cement, 10 kg of kaolinite, 5 kg of ferrous sulfate heptahydrate, and 5 kg of potassium carbonate trihydrate.

[0090] The preparation method of the flue gas desulfurizer is as follows: all the above raw materials are put into a mixing device and mixed evenly to obtain a mixed powder; 60% of the weight of water is added to the mixed powder, and after sealed stirring in the mixing device for 10 minutes, hydraulic equipment is used for extrusion molding to obtain a molded material; the molded material is placed in a sealed insulation box at 100°C and kept warm for 4 hours; the molded material is taken out of the sealed insulation box and roasted at 300°C for 4 hours, taken out and aired to room temperature to obtain a four-leaf clover strip flue gas desulfurizer finished product with a diameter of 6-8mm.

[0091] Example 4

[0092] The present embodiment provides a flue gas treatment device, which differs from the embodiment 1 only in that the flue gas desulfurizers filled in the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are different: the raw materials of the flue gas desulfurizer are as follows: 50 kg of slaked lime powder, 30 kg of microsilica powder, 10 kg of cement, 10 kg of kaolinite, and 12 kg of ferric chloride hexahydrate.

[0093] The preparation method of the flue gas desulfurizer is as follows: all the above raw materials are put into a mixing device and mixed evenly to obtain a mixed powder; 30% of the weight of water is added to the mixed powder, and after sealed stirring in the mixing device for 20 minutes, a hydraulic device is used to extrude and mold the mixed material to obtain a molded material; the molded material is placed in a sealed insulation box at 80°C and kept warm for 10 hours; the molded material is taken out of the sealed insulation box and roasted at 200°C for 4 hours, taken out and aired to room temperature to obtain a granular flue gas desulfurizer finished product with a particle size of 4 to 6 mm.

[0094] Example 5

[0095] The present embodiment provides a flue gas treatment device, which differs from the embodiment 1 only in that the flue gas desulfurizers filled in the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are different: 6 kg of cement is used to replace the binder in the embodiment 1 (2 kg of cement, 2 kg of kaolinite, and 2 kg of montmorillonite), and a granular flue gas desulfurizer product is obtained with a particle size of 6 to 8 mm.

[0096] Example 6

[0097] The present embodiment provides a flue gas treatment device, which differs from the embodiment 1 only in that the flue gas desulfurizers filled in the first flue gas treatment chamber 3 and the second flue gas treatment chamber 4 are different: 3 kg of kaolinite and 3 kg of montmorillonite are used to replace the binder in the embodiment 1 (2 kg of cement, 2 kg of kaolinite, and 2 kg of montmorillonite) to obtain a granular flue gas desulfurizer product with a particle size of 6 to 8 mm.

[0098] Experimental Example 1

[0099] The following performance indicators of the flue gas desulfurizer filled in the first flue gas treatment chamber and the second flue gas treatment chamber in Examples 1-6 were tested: bulk density, radial crushing strength, and porosity. For comparison, fly ash was used to replace the microsilica powder in Example 1 to obtain a granular flue gas desulfurizer product, which was used as reference product 1. 6 kg of activated carbon powder was used to replace 3 kg of sodium sulfate dehydrate and 3 kg of calcium chloride dihydrate in Example 1 to obtain a granular flue gas desulfurizer product, which was used as reference product 2.

[0100] The detection methods of each indicator are as follows:

[0101] (1) The test method of bulk density refers to: HGT 4680-2014 Determination of bulk density of fertilizer catalysts;

[0102] (2) The radial crushing strength test method refers to: HGT 2782-2011 Determination of the crushing strength of fertilizer catalyst particles;

[0103] (3) The porosity is calculated as follows:

[0104] P=(V0-V) / V0×100%=(1-ρ0 / ρ)×100%

[0105] P—Material porosity (%);

[0106] V0—the volume of the material in its natural state, or the apparent volume, cm 3 or m 3 ; ρ0 is the volume density of the material, g / cm 3 or kg / m 3 ;

[0107] V—absolute dense volume of the material, cm 3 or m 3 ; ρ is the material density, g / cm 3 or kg / m 3 .

[0108] The test results of each index are shown in Table 2.

[0109] Table 2 Flue gas desulfurization agent performance index test results

[0110]

[0111]

[0112] It can be seen from the test data of Examples 1-6 that the flue gas desulfurization agent filled in the first flue gas treatment chamber and the second flue gas treatment chamber has a relatively small bulk density (0.5-0.8 g / cm 3), higher radial crushing strength (120-280N / cm), and larger porosity (40-65%). It can be seen from the test data of Example 1 and Example 5 that when only cement is used as the binder, although the radial crushing strength is improved compared with the use of cement and clay, its porosity is significantly reduced. It can be seen from the test data of Example 1 and Example 6 that when only clay is used as the binder, its radial crushing strength is significantly reduced compared with the use of cement and clay, but its porosity and bulk density are almost the same. It can be seen from the test data of Example 1 and Control 1 that the use of fly ash instead of microsilica powder has poor performance in terms of bulk density, radial crushing strength and porosity. It can be seen from the test data of Example 1 and Comparative Example 2 that the use of activated carbon as a pore-forming agent has poor performance in terms of bulk density, radial crushing strength and porosity compared with the selection of crystalline hydrated salt.

[0113] Experimental Example 2

[0114] The dust removal and desulfurization efficiency of the flue gas treatment devices in Examples 1 to 6 were tested. For comparison, the reference samples 1 and 2 in Experimental Example 1 were filled into the first flue gas treatment chamber and the second flue gas treatment chamber for testing.

[0115] (1) The calculation method of dust removal efficiency is as follows:

[0116] Dust removal efficiency = (g0-g) / g0×100%

[0117] g0—dust content of flue gas before passing through desulfurizer, mg / Nm 3 ;

[0118] g—dust content of flue gas after passing through desulfurizer, mg / Nm 3 ;

[0119] The dust content in the flue gas is tested once an hour by a dust analyzer at the inlet and outlet gas concentrations. The average value is calculated based on the 48-hour test data. The dust content of the flue gas introduced in the test method is 100 mg / Nm3, and the contact time between the flue gas and the flue gas desulfurizer is 6.0 s.

[0120] (2) The calculation method of desulfurization efficiency is as follows:

[0121] Desulfurization efficiency = (C0-C) / C0×100%

[0122] C0—SO2 concentration of flue gas before passing through desulfurizer, mg / Nm 3 ;

[0123] C—SO2 concentration of flue gas after passing through desulfurizer, mg / Nm 3 ;

[0124] The SO2 concentration in the flue gas is tested once an hour at the inlet and outlet gas concentrations using a flue gas analyzer, and the average value is calculated using 48 hours of test data. The SO2 concentration of the flue gas introduced in the test method is 2000ppm, and the contact time between the flue gas and the flue gas desulfurizer is 6.0s.

[0125] The test results are shown in Table 3.

[0126] Table 3 Test results of dust removal and desulfurization efficiency of flue gas treatment equipment

[0127]

[0128]

[0129] It can be seen from the test data of Examples 1-6 that the flue gas treatment device provided by the embodiments of the present invention has the function of integrated desulfurization and dust removal, and both the dust removal efficiency and the desulfurization efficiency are high. It can be seen from the test data of Examples 1 and 5 that the binder only uses cement, and the dust removal efficiency is equivalent compared to the use of cement and clay, but the desulfurization efficiency is reduced. It can be seen from the test data of Examples 1 and 6 that the binder only uses clay, and the dust removal efficiency is high and the desulfurization efficiency is slightly reduced compared to the use of cement and clay. It can be seen from the test data of Example 1 and Reference 1 that the use of fly ash instead of microsilica powder significantly reduces the dust removal efficiency and desulfurization efficiency. It can be seen from the test data of Example 1 and Comparative Example 2 that the use of activated carbon as a pore-forming agent, compared with the selection of crystalline hydrated salt, also significantly reduces the dust removal efficiency and desulfurization efficiency.

[0130] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the protection scope of the invention.

Claims

1. A flue gas treatment device, characterized in that: include: A housing and a first material stop structure, a second material stop structure and a third material stop structure arranged in sequence along the radial direction of the housing, The first material blocking structure, the second material blocking structure and the third material blocking structure divide the shell into an air inlet chamber, a first smoke treatment chamber, a second smoke treatment chamber and an air outlet chamber which are connected in sequence along the radial direction. The air inlet chamber is provided with a smoke inlet, the air outlet chamber is provided with a smoke outlet, the first smoke treatment chamber and the second smoke treatment chamber are both provided with a feed inlet at the top and a discharge outlet at the bottom; The second material blocking structure comprises a plurality of second grid plates arranged in sequence along the axis direction of the shell, and the second grid plates are in the form of a folded plate structure bent along the arrangement direction of the first smoke treatment chamber and the second smoke treatment chamber; The first flue gas treatment chamber and the second flue gas treatment chamber are filled with a flue gas desulfurizer, which includes the following raw materials by weight: 30 to 60 parts of slaked lime powder, 20 to 60 parts of microsilica powder, 6 to 24 parts of a binder, and 6 to 15 parts of crystalline hydrated salt.

2. The flue gas treatment device according to claim 1, characterized in that: The second material-blocking structure includes a plurality of second material-blocking components sequentially connected and arranged along the axis direction of the shell, and the second material-blocking component includes a second component frame and the second grid plate, and the second grid plate is arranged in the second component frame.

3. The flue gas treatment device according to claim 1 or 2, characterized in that: The second grid plate is in an inverted V shape.

4. The flue gas treatment device according to claim 1, characterized in that: The first material blocking structure includes a plurality of first grid plates sequentially arranged along the axial direction of the shell, and the plurality of first grid plates are inclined downward toward the inside of the first flue gas treatment chamber.

5. The flue gas treatment device according to claim 4, characterized in that: The first material-blocking structure includes a plurality of first material-blocking components sequentially connected and arranged along the axis direction of the shell. The first material-blocking component includes a first component frame and the first grid plate. The first grid plate is arranged in the first component frame.

6. The flue gas treatment device according to claim 1, characterized in that: The third material blocking structure includes a plurality of third grid plates sequentially arranged along the axial direction of the shell, and the plurality of third grid plates are tilted downward toward the inside of the second flue gas treatment chamber.

7. The flue gas treatment device according to claim 6, characterized in that: The third material-blocking structure comprises a plurality of third material-blocking components sequentially connected and arranged along the axis direction of the shell, the third material-blocking component comprises a third component frame and the third grid plate, and the third grid plate is arranged in the third component frame.

8. The flue gas treatment device according to claim 1, characterized in that: Along the radial direction of the shell, the width of the first flue gas treatment chamber is smaller than that of the second flue gas treatment chamber.

9. The flue gas treatment device according to claim 1 or 2, characterized in that: The shell is in the shape of a cuboid.

10. The flue gas treatment device according to claim 1 or 2, characterized in that: The smoke treatment device comprises at least two groups of the air inlet chamber, the first smoke treatment chamber and the second smoke treatment chamber, and the second smoke treatment chamber in at least two groups of the air inlet chamber, the first smoke treatment chamber and the second smoke treatment chamber are both connected to the same air outlet chamber.

11. The flue gas treatment device according to claim 1, characterized in that: In terms of weight, the binder includes 2 to 9 parts of cement and 4 to 15 parts of clay.

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