A method and device for preparing an environmentally friendly biological calcium denitrifier

Abstract

The present invention relates to the technical field of denitrification agent preparation, and discloses an environmentally friendly biological calcium denitrification agent preparation method and device, including a petal kettle body component as a stirring container, a power sealing component providing stirring power, and a flow control component for flow control of the internal space of the petal kettle body component. The present invention has a simple and compact structure, without a complex transmission mechanism, and uses a basic stirring paddle transmission with a reasonable spatial flowability design to enable efficient preparation of biological calcium denitrification agents, and can also be applied to the preparation of other products; and the present invention is easy to produce and process, with low material costs, and is more conducive to the transformation of scientific and technological achievements compared to the complex transmission and basic structure of the prior art. The present invention can clean the kettle body during shutdown, and can clean the main kettle barrel body and the inside of the auxiliary kettle enclosure at the same time, and the inside of the auxiliary kettle enclosure can be thoroughly flushed, with high cleaning efficiency and good effect.

Description

Technical Field

[0001] The invention relates to the technical field of denitrification agent preparation, and in particular to a method and a device for preparing an environmentally friendly biological calcium denitrification agent. Background Art

[0002] The emission of air pollutants increases year by year. The main source of air pollutants is industrial flue gas. Therefore, reducing the emission of pollutants in flue gas is the key to environmental governance. The main pollutant in flue gas is NOx. As one of the main pollutants causing greenhouse effect, global warming, acid rain and photochemical smog, the research on its removal method has received more and more attention. The implementation of ultra-low concentration emission of NOx in industrial production has also become a general trend.

[0003] The main function of biological calcium denitrifier is to reduce nitrogen oxides (NOx) in flue gas into nitrogen and water through chemical reactions, thereby reducing environmental pollution. Biological calcium denitrifier is an environmentally friendly and efficient denitrifier. It can reduce NOx in flue gas into nitrogen and water through chemical reactions within a certain temperature range, thereby achieving the purpose of denitrification. This denitrifier has the characteristics of high efficiency, environmental protection, and no secondary pollution.

[0004] The Chinese invention patent with publication number CN113117475B: A composite fiber denitrifier and its preparation method, discloses the components and preparation method of the denitrifier, the denitrifier is harmless, has high denitrification efficiency and low production cost; however, the denitrification efficiency is not improved enough, and there is no corresponding denitrification equipment, and there is still room for improvement in efficiency;

[0005] The Chinese invention patent with publication number CN117839511A: A method and device for preparing a bio-calcium composite fiber organic denitrification agent, discloses a method and a reaction device for preparing a denitrification agent, realizes the automation of solvent mixing, and can improve the production efficiency of the denitrification agent; although the above invention patent can realize the automated production of the denitrification agent with the help of a series of transmission structures, the structure is complex, and the complexity of the structure is proportional to the damage rate, which is a common mechanical knowledge, and the production efficiency needs to be further improved;

[0006] Therefore, there is an urgent need in the art for an environmentally friendly biological calcium denitrification agent preparation method and device to solve the technical problem that the prior art cannot take into account both production efficiency and structural simplification. Summary of the invention

[0007] The purpose of the present invention is to provide an environmentally friendly biological calcium denitrification agent preparation method and device to solve the technical problem that the prior art cannot take into account both production efficiency and structural simplification.

[0008] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: an environmentally friendly biological calcium denitrification agent preparation device, comprising a petal kettle assembly as a stirring container, a power sealing assembly providing stirring power, and a flow control assembly for controlling the flow of the internal space of the petal kettle assembly;

[0009] The petal kettle assembly includes a main kettle barrel body, which can produce the main material solution and mix the main material solution with the ingredient solution. The upper part of the main kettle barrel body is formed with at least two first side plates in a circular array, and the gap between the adjacent first side plates is a flow channel. A second side plate is fixedly installed in the flow channel. The side of the second side plate close to the axis of the main kettle barrel body is an arc surface, and the arc surface protrudes toward the axis of the main kettle barrel body; the two side walls of the first side plate close to the flow channel are guide slopes, and the guide slopes and the first side plates are connected to each other. The angle of the tangent of the circle where the arc-shaped side wall is located is less than 50°, and the area of ​​the arc-shaped inner side wall of the first side plate is larger than the area of ​​the arc-shaped outer side wall of the first side plate; the adjacent second side plates are fixedly connected to a sub-kettle enclosure plate, the sub-kettle enclosure plate is an arc plate structure, the arc-shaped convex surface of the sub-kettle enclosure plate faces away from the direction of the axis of the main kettle barrel body, and the bottom end of the sub-kettle enclosure plate is sealed and fixed with a sub-kettle bottom plate, so that the inside of the sub-kettle enclosure plate is surrounded by a space that is not circulated with the outside world, which is used for the production and preparation of the batching solution; the bottom end of the main kettle barrel body is fixedly sealed with a base, and the bottom end of the base is installed with The discharge pipe can connect the inside of the main kettle barrel with the outside, and the discharge pipe is connected with a valve; the arc surface of the second side plate is designed with the guide slope to form a uniform flow channel that can cater to the flow direction of the fluid, so that the main material solution rotating in the main kettle barrel can flow into the auxiliary kettle enclosure through the flow channel with high efficiency, and the main material solution or the batching solution in the auxiliary kettle enclosure can also flow back to the main kettle barrel through the flow channel on the other side. When it is necessary to mix the batching solution in the auxiliary kettle enclosure with the main material solution in the main kettle barrel, the large opening and The flow channels that touch the bottom up and down can make the inside of the auxiliary kettle enclosure have no dead corners, and the batching solution can flow into the main kettle barrel body with high efficiency. In the mixing process, the main material solution and the batching solution are continuously flushed inside the auxiliary kettle enclosure, so that the batching solution does not hang on the wall or produce residues due to dead corners, so that the utilization rate of the output of the batching solution is high; the production method is simple, and the main material solution is produced in the main kettle barrel body by the stirring and mixing action of the first stirring paddle, and the batching solution is produced in the auxiliary kettle enclosure by the stirring and mixing action of the second stirring paddle.

[0010] The above structural design can also clean the kettle body during shutdown, and can clean the main kettle barrel body and the inside of the auxiliary kettle enclosure at the same time. The inside of the auxiliary kettle enclosure can be thoroughly flushed, and the cleaning efficiency is high and the effect is good; the cleaning method is simple, and the cleaning solution is injected into the main kettle barrel body, and the first stirring paddle is started to make the cleaning solution generate a vortex. Under the action of centrifugal force, the cleaning solution flushes the inner wall of the auxiliary kettle enclosure; and the arc-shaped design of the auxiliary kettle enclosure can reduce the flow resistance of the solution when it circulates inside the auxiliary kettle enclosure and the main kettle barrel body.

[0011] The batching solution includes an additive solution, a dispersant solution, a catalyst solution, a flame retardant solution, a thickener solution and a stabilizer solution. Each batching solution is mixed and produced in a group of auxiliary kettle enclosures, or a limited number of auxiliary kettle enclosures are repeatedly used to produce the batching solution; the main material solution is produced using the main kettle barrel;

[0012] The power sealing assembly includes a kettle cover, which can seal the main kettle barrel and the auxiliary kettle enclosure to prevent the solution from splashing out. The kettle cover is equipped with a first motor and a second motor. The first motor is connected to a first stirring paddle for downward transmission, and the second motor is connected to a second stirring paddle for downward transmission. The first stirring paddle is located in the main kettle barrel, and the second stirring paddle is located in the auxiliary kettle enclosure.

[0013] The flow control component includes a sealing spring plate and a secondary cut-off plate installed inside the flow channel. The sealing spring plate can cut off the flow relationship between the secondary kettle enclosure and the main kettle barrel body, and the secondary cut-off plate can cut off the flow relationship between the internal space between adjacent secondary kettle enclosures, so that the main material solution and the ingredient solution can be produced and prepared independently. After the preparation of the main material solution and the ingredient solution is completed, when it is necessary to enter the mixed production stage, the cut-off function of the sealing spring plate and the secondary cut-off plate is cancelled, so that the secondary kettle enclosure and the main kettle barrel body can effectively flow, and the main material solution, the mixture and the ingredient solution are fully mixed.

[0014] As a preferred solution, the kettle cover includes a main kettle cover and an auxiliary kettle cover, the main kettle cover cooperates with the main kettle barrel, and the auxiliary kettle cover cooperates with the auxiliary kettle enclosure.

[0015] As a preferred embodiment, the sealing spring plate is an arc-shaped plate structure, and the arc-shaped convex surface is facing the direction of the axis of the main kettle barrel body. The horizontal ends of the convex surface of the sealing spring plate are respectively abutted against the guide slopes of the two adjacent first side plates. The flow control component also includes an iron plate fixedly installed in the middle of the arc-shaped concave surface of the sealing spring plate, and a tension spring fixedly connected to the side of the iron plate away from the sealing spring plate. The end of the tension spring away from the iron plate is fixedly connected to the second side plate. The elastic tension of the tension spring can push the sealing spring plate in the direction of the axis of the main kettle barrel body, so that the two ends of the sealing spring plate in the horizontal direction can be tightly abutted against the guide slopes, effectively separating the internal space of the main kettle barrel body from the internal space of the auxiliary kettle enclosure.

[0016] As a preferred solution, the secondary truncation plate is a corrugated plate, one end of the corrugated plate is connected and fixed to one end of the concave surface of the sealing spring plate in the horizontal direction, and the end of the corrugated plate away from the sealing spring plate is connected and fixed to the second side plate, so that the adjacent secondary kettle enclosures are sealed and isolated. The corrugated plate is a prior art structure, and a plurality of plates are connected by a rotating shaft, so that the corrugated plate has a folding function. The outer surface of the corrugated plate is coated with an isolation layer to enhance the sealing effect of the corrugated plate;

[0017] At least one mounting groove is provided on the side wall of the second side plate away from the axis of the main kettle barrel body, and an electromagnet is installed inside the mounting groove. The electromagnet, the first motor and the second motor are all connected to the external controller signal. During the preparation of the main material solution and the batching solution, the sealing spring plate abuts against the guide slope. After the preparation of the main material solution and the batching solution is completed, when mixed production is required, the electromagnet is started to attract the iron plate and the sealing spring plate, and the tension spring is compressed to form Figure 7 In the state shown, the interior of the main kettle barrel is connected with the interior of the auxiliary kettle enclosure, and mixed production can be carried out.

[0018] As a preferred solution, a sealing ring is fixedly installed on the inner wall of the main kettle body near the bottom end of the circulation channel, and the top surface of the sealing ring is flush with the bottom surface of the circulation channel. The presence of the sealing ring can prevent the convex surface of the sealing spring plate from protruding too much in the direction of the axis of the main kettle body, resulting in a loose seal.

[0019] As a preferred solution, the isolation layer is made of rubber.

[0020] As a preferred solution, two corrugated plates are provided in each flow channel. The two corrugated plates are respectively located on both sides of the tension spring. They can enhance the sealing effect and balance the force on the tension spring. At the same time, they can isolate an independent area where no liquid flows in the area where the tension spring is located, so that when the tension spring contracts or extends, the damping force of the liquid is small, thereby improving the control sensitivity.

[0021] As a preferred solution, a rubber layer is fixedly provided on the guide slope to enhance the sealing effect between the sealing spring plate and the first side plate.

[0022] As a preferred solution, the main kettle cover and the auxiliary kettle cover are integrally formed, and a rubber layer is fixedly provided on the bottom surfaces of the main kettle cover and the auxiliary kettle cover. When the kettle cover is closed, the rubber layer can be used to provide sufficient downward pressure on the sealing spring plate to improve the sealing stability of the upper and lower ends of the sealing spring plate. An integral rubber layer is fixedly provided on the bottom surface of the flow channel and the top surface of the sealing ring. When the sealing spring plate is controlled and adjusted by using an electromagnet, the kettle cover needs to be opened to reduce the displacement resistance of the sealing spring plate.

[0023] The present invention also provides a method for preparing a denitrifier using an environmentally friendly biological calcium denitrifier preparation device. In the preparation method, the environmentally friendly biological calcium denitrifier comprises the following components by weight:

[0024] Water-soluble cellulose: 20-30 parts, urea: 3-5 parts, catalyst: 20-30 parts, rare earth oxide: 5-8 parts, additive: 0.2-0.4 parts, thickener: 0.1-0.2 parts, flame retardant: 2-4 parts, stabilizer: 2-4 parts, dispersant: 1-3 parts;

[0025] The method for preparing an environmentally friendly biological calcium denitrifier comprises the following steps:

[0026] S1. rare earth oxide treatment: mixing rare earth oxide and urea uniformly, and performing activation heat treatment to obtain a mixture;

[0027] S2. Preparation of the batching solution: using multiple auxiliary kettle enclosures to prepare the auxiliary agent solution, dispersant solution, catalyst solution, flame retardant solution, thickener solution, and stabilizer solution respectively. The above preparation method is the existing technology and will not be described in detail;

[0028] S3, preparation of main material solution: prepare the main material solution using the main kettle barrel, add water-soluble cellulose into the main kettle barrel, then add water to fully stir and dissolve, add reverse osmosis concentrated brine and polyacrylamide to the dissolved water-soluble cellulose, stir and dissolve to form the main material solution;

[0029] S4, mixing and preparing: open the kettle cover, use the electromagnet to control the sealing spring plate to move in the direction of the second side plate, so that the main kettle barrel body and the auxiliary kettle enclosure are connected, and according to the order of adding ingredients, the displacement of the sealing spring plates in different directions is controlled to achieve the mixing of ingredients in order, and then add the mixture prepared in S1; then close the kettle cover, start the first motor to drive the first stirring paddle to fully mix the main ingredient solution, the ingredient solution and the mixture prepared in S1. During the mixing process, due to the continuous inflow and outflow of the mixed solution in the auxiliary kettle enclosure, the outflowing mixed solution and the mixed solution in the vortex flow direction in the main kettle barrel body have different flow directions, which will generate turbulence, and can improve the mixing efficiency of the mixed solution in the vertical direction, and finally the denitrification agent is prepared;

[0030] S5. Shutdown maintenance: Open the valve, discharge the denitrification agent through the discharge pipe, add the cleaning solution into the main kettle body, start the first stirring paddle for stirring, and clean the main kettle body and the inner wall of the auxiliary kettle enclosure.

[0031] As a preferred embodiment, the catalyst is a mixture of calcium carbonate, manganese dioxide and manganese sulfate, and the mass ratio is: calcium carbonate: manganese dioxide: manganese sulfate = 3:1:1; the auxiliary agent is aluminum oxide; the thickener is carboxymethyl cellulose; the flame retardant is one or more of ammonium polyphosphate and magnesium sulfate; the stabilizer is one or more of sodium dihydrogen phosphate, disodium hydrogen phosphate and trisodium phosphate; the dispersant is one or more of 12-hydroxystearic acid and dioctyl phthalate; the rare earth oxide is a mixture of lanthanum oxide, cerium dioxide and samarium oxide, and the mass ratio is: cerium dioxide: lanthanum oxide: samarium oxide = 1:2:1.

[0032] Beneficial effects: The present invention has a simple and compact structure, without a complicated transmission mechanism. The basic agitator transmission is combined with a reasonable spatial flowability design, so that the biological calcium denitrifier can be efficiently prepared, and can also be applied to the preparation of other products. The present invention is easy to produce and process, with low material cost. Compared with the complex transmission and basic structure of the prior art, it is more conducive to the transformation of scientific and technological achievements.

[0033] In the present invention, the arc surface of the second side plate is matched with the design of the guide slope, so that the flow channel forms a uniform flow channel that can cater to the flow direction of the fluid, so that the main material solution rotating in the main kettle barrel body can flow into the auxiliary kettle enclosure through the flow channel with high efficiency, and the main material solution or the batching solution in the auxiliary kettle enclosure can also flow back to the main kettle barrel body through the flow channel on the other side. When it is necessary to mix the batching solution in the auxiliary kettle enclosure with the main material solution in the main kettle barrel body, the flow channel with a large opening and bottoming can make the auxiliary kettle enclosure have no dead angle of flow, and the batching solution can flow into the main kettle barrel body with high efficiency. In the mixing process, the main material solution and the batching solution are continuously flushed in the auxiliary kettle enclosure, so that the batching solution does not hang on the wall or remain due to dead angles, so that the utilization rate of the output of the batching solution is high.

[0034] In the present invention, when the kettle body is cleaned during shutdown, the main kettle barrel body and the inside of the auxiliary kettle enclosure can be cleaned at the same time, the inside of the auxiliary kettle enclosure can be thoroughly flushed, and the cleaning efficiency is high and the effect is good; the cleaning method is simple, and the cleaning solution is injected into the main kettle barrel body, and the first stirring paddle is started to stir the cleaning solution for cleaning.

[0035] No adhesive is added to the components of the denitrifier of the present invention. The main function of the adhesive is to maintain the mixing uniformity of the components of the denitrifier. The specific device used in the present invention makes the mixing more uniform, reduces the addition of chemical substances, reduces costs, and avoids the adhesive from affecting the performance of other components.

[0036] The denitrification agent of the present invention uses water-soluble cellulose, which does not cause harm to the environment during production and denitrification, is more environmentally friendly, and is easily soluble, does not require emulsification, and has a low production cost. Water-soluble cellulose belongs to high-molecular organic fiber. Under the action of the catalyst in the denitrification agent component of the present invention, the hexose polymer is decomposed into free radicals containing a small amount of C, H, and O. Because the O content is high, the free radicals are more active than the C and H free radicals that do not contain O, and the reaction temperature range is wider, the reaction efficiency is higher, and the denitrification efficiency is high and the temperature range is wide. The denitrification agent of the present invention uses cheap Ca as the active component raw material, which effectively reduces the cost of the denitrification agent.

[0037] Rare earth oxides are used in the present invention. Rare earth metals and their oxides are used as main active components and catalyst promoters in the field of catalysis, and exhibit high activity and strong thermal stability. Since rare earth elements are located in a special position in the periodic table and have a special electronic layer structure, they have very rich special properties such as light, electricity, magnetism, and chemistry. Lanthanum oxide, cerium dioxide, and samarium oxide have good denitrification activity. Rare earth ions can interact with other substances on the surface of the catalyst to improve the catalytic activity and thermal stability of the catalyst. When rare earth metals are used as promoters in the denitrification catalyst, they mainly improve the dispersibility of the active components of the catalyst, inhibit the sintering of the active components, increase the specific surface area of ​​the catalyst, improve the pore structure of the catalyst, and improve the denitrification activity.

[0038] The catalyst of the present invention is a mixture of calcium carbonate, manganese dioxide and manganese sulfate. Multiple catalysts improve catalytic efficiency and also cooperate with rare earth oxides. The rare earth oxidant acts on the corresponding catalyst to further improve the activity of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0040] Figure 1 A schematic diagram of the overall structure of the preparation device provided in Example 1 of the present invention;

[0041] Figure 2 A disassembled diagram of a preparation device provided in Example 1 of the present invention;

[0042] Figure 3 A schematic diagram of the structure of the preparation device provided in Example 1 of the present invention in a top oblique view without a kettle cover;

[0043] Figure 4 A top view of the preparation device provided in Example 1 of the present invention without a kettle cover;

[0044] Figure 5 A schematic diagram of the structure of the preparation device provided in Example 1 of the present invention when there is no kettle cover and the device is viewed from the top;

[0045] Figure 6 For the present invention Figure 4 A magnified image of area A;

[0046] Figure 7 For the present invention Figure 6 A schematic diagram of the structure when the sealing spring plate is attracted by the electromagnet;

[0047] Figure 8 Provided for Example 2 of the present invention Figure 4 Schematic diagram of area A in the middle.

[0048] Description of reference numerals:

[0049] 101, main kettle body; 102, first side plate; 103, circulation channel; 104, second side plate; 105, auxiliary kettle enclosure; 106, base; 107, auxiliary kettle bottom plate; 201, main kettle cover; 202, auxiliary kettle cover; 203, first motor; 204, first stirring paddle; 205, second motor; 206, second stirring paddle; 301, sealing spring plate; 302, tension spring; 303, corrugated plate; 304, mounting groove; 305, electromagnet; 306, sealing ring; 307, iron plate. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0051] Example 1: Figure 1-Figure 7 As shown, an environmentally friendly biological calcium denitrification agent preparation device provided by an embodiment of the present invention includes a petal kettle assembly as a stirring container, a power sealing assembly providing stirring power, and a flow control assembly for controlling the flow of the internal space of the petal kettle assembly;

[0052] The petal kettle assembly includes a main kettle barrel 101, which can produce the main material solution and mix the main material solution with the ingredient solution. The upper part of the main kettle barrel 101 is formed with ten first side plates 102 in a circular array. The gap between adjacent first side plates 102 is a flow channel 103. A second side plate 104 is fixedly installed in the flow channel 103. The second side plate 104 is an arc surface on one side close to the axis of the main kettle barrel 101, and the arc surface bulges toward the axis of the main kettle barrel 101; the two side walls of the first side plate 102 close to the flow channel 103 are guide slopes, and the guide slopes are connected to the first side plate 10 The angle of the tangent of the circle where the arc-shaped side wall is located is 40°, and the area of ​​the arc-shaped inner side wall of the first side plate 102 is larger than the area of ​​the arc-shaped outer side wall of the first side plate 102; the adjacent second side plates 104 are fixedly connected to a sub-kettle enclosure 105, and the sub-kettle enclosure 105 is an arc plate structure, and the arc-shaped convex surface of the sub-kettle enclosure 105 faces away from the direction of the axis of the main kettle barrel body 101, and the bottom end of the sub-kettle enclosure 105 is sealed and fixed with a sub-kettle bottom plate 107, so that the inside of the sub-kettle enclosure 105 is enclosed into a space that is not circulated with the outside world, which is used for the production and preparation of the batching solution; the bottom end of the main kettle barrel body 101 is fixedly sealed with a base 106, and the bottom end of the base 106 A feed pipe is installed to connect the inside of the main kettle barrel 101 with the outside, and the feed pipe is connected with a valve; the arc surface of the second side plate 104 cooperates with the design of the guide slope to form a uniform flow channel 103 that can cater to the flow direction of the fluid, so that the main material solution rotating in the main kettle barrel 101 can flow into the auxiliary kettle enclosure 105 efficiently through the flow channel 103, and the main material solution or the ingredient solution in the auxiliary kettle enclosure 105 can also flow back to the main kettle barrel 101 through the flow channel 103 on the other side. When it is necessary to mix the ingredient solution in the auxiliary kettle enclosure 105 into the main material solution in the main kettle barrel 101 When mixing, the flow channel 103 with a large opening and touching the bottom up and down can make the auxiliary kettle enclosure 105 have no dead corners, and the batching solution can flow into the main kettle barrel 101 efficiently. In the mixing process, the main material solution and the batching solution are continuously flushed inside the auxiliary kettle enclosure 105, so that the batching solution does not stick to the wall or remain due to dead corners, so that the utilization rate of the output of the batching solution is high; the production method is simple, the main material solution is produced in the main kettle barrel 101 by the stirring and mixing action of the first stirring paddle 204, and the batching solution is produced in the auxiliary kettle enclosure 105 by the stirring and mixing action of the second stirring paddle 206.

[0053] The above structural design can also clean the kettle body when the machine is shut down, and can clean the main kettle barrel body 101 and the inside of the auxiliary kettle enclosure 105 at the same time. The inside of the auxiliary kettle enclosure 105 can be thoroughly flushed, and the cleaning efficiency is high and the effect is good; the cleaning method is simple, and the cleaning solution is injected into the main kettle barrel body 101, and the first stirring paddle 204 is started to make the cleaning solution generate a vortex. Under the action of centrifugal force, the cleaning solution flushes the inner wall of the auxiliary kettle enclosure 105; and the arc-shaped design of the auxiliary kettle enclosure 105 can reduce the flow resistance of the solution when it circulates between the auxiliary kettle enclosure 105 and the main kettle barrel body 101.

[0054] The batching solution includes an additive solution, a dispersant solution, a catalyst solution, a flame retardant solution, a thickener solution and a stabilizer solution. Each batching solution is mixed and produced in a group of auxiliary kettle enclosures 105. The main material solution is composed of water-soluble fiber.

[0055] The dynamic sealing assembly includes a kettle cover, which can cover the main kettle barrel 101 and the auxiliary kettle enclosure 105 to prevent the solution from splashing out. The kettle cover is equipped with a first motor 203 and a second motor 205. The first motor 203 is connected to a first stirring paddle 204 for downward transmission, and the second motor 205 is connected to a second stirring paddle 206 for downward transmission. The first stirring paddle 204 is located in the main kettle barrel 101, and the second stirring paddle 206 is located in the auxiliary kettle enclosure 105.

[0056] The flow control component includes a sealing spring plate 301 and a secondary cut-off plate installed inside the flow channel 103. The sealing spring plate 301 can cut off the flow relationship between the secondary kettle enclosure 105 and the main kettle barrel body 101, and the secondary cut-off plate can cut off the flow relationship between the adjacent secondary kettle enclosures 105, so that the main material solution and the ingredient solution can be produced and prepared independently. After the preparation of the main material solution and the ingredient solution is completed, when it is necessary to enter the mixed production stage, the cutting function of the sealing spring plate 301 and the secondary cut-off plate is cancelled, so that the secondary kettle enclosure 105 and the main kettle barrel body 101 can effectively flow, and finally the main material solution, the ingredient solution and the mixture are fully mixed.

[0057] The height of the sealing spring plate 301 , the height of the first side plate 102 , and the height of the flow channel 103 are equal.

[0058] The kettle cover comprises a main kettle cover 201 and an auxiliary kettle cover 202 . The main kettle cover 201 is matched with the main kettle barrel 101 , and the auxiliary kettle cover 202 is matched with the auxiliary kettle enclosure 105 .

[0059] The sealing spring plate 301 is an arc-shaped plate structure, and the arc-shaped convex surface faces the direction of the axis of the main kettle barrel body 101. The horizontal ends of the convex surface of the sealing spring plate 301 are respectively abutted against the guide slopes of the two adjacent first side plates 102. The flow control component also includes an iron plate 307 fixedly installed in the middle of the arc-shaped concave surface of the sealing spring plate 301, and four tension springs 302 fixedly connected to the side of the iron plate 307 away from the sealing spring plate 301. The end of the tension spring 302 away from the iron plate 307 is fixedly connected to the second side plate 104. The elastic tension of the tension spring 302 can push the sealing spring plate 301 in the direction of the axis of the main kettle barrel body 101, so that the two ends of the sealing spring plate 301 in the horizontal direction can be tightly abutted against the guide slopes, effectively separating the internal space of the main kettle barrel body 101 from the internal space of the auxiliary kettle enclosure 105.

[0060] The secondary truncation plate is a corrugated plate 303, one end of the corrugated plate 303 is connected and fixed to one end of the concave surface of the sealing spring plate 301 in the horizontal direction, and the end of the corrugated plate 303 away from the sealing spring plate 301 is connected and fixed to the second side plate 104, so that the internal spaces of the adjacent secondary kettle enclosures 105 are sealed and isolated. The corrugated plate 303 is a prior art structure, and adopts a method of connecting multiple plates with a rotating shaft to make the corrugated plate 303 have a folding function. The outer surface of the corrugated plate 303 is covered and fixed with a rubber isolation layer to enhance the sealing effect of the corrugated plate 303;

[0061] At least one mounting groove 304 is provided on the side wall of the second side plate 104 away from the axis of the main kettle barrel 101, and an electromagnet 305 is installed inside the mounting groove 304. The electromagnet 305, the first motor 203 and the second motor 205 are all connected to the external controller signal. During the preparation of the main material solution and the batching solution, the sealing spring plate 301 abuts against the guide slope. After the preparation of the main material solution and the batching solution is completed, when mixed production is required, the electromagnet 305 is started to attract the iron plate 307 and the sealing spring plate 301, and the tension spring 302 is compressed to form Figure 7 In the state shown, the interior of the main kettle barrel 101 is connected with the interior of the auxiliary kettle enclosure 105, and mixed production can be carried out.

[0062] A sealing ring 306 is fixedly installed on the inner wall of the main kettle barrel 101 near the bottom end area of ​​the circulation channel 103. The top surface of the sealing ring 306 is flush with the bottom surface of the circulation channel 103. The existence of the sealing ring 306 can prevent the convex surface of the sealing spring plate 301 from protruding too much in the direction of the axis of the main kettle barrel 101, resulting in a loose seal.

[0063] A rubber layer is fixedly disposed on the guide slope to enhance the sealing effect between the sealing spring plate 301 and the first side plate 102 .

[0064] The main kettle cover 201 and the auxiliary kettle cover 202 are integrally formed, and a rubber layer is fixedly arranged on the bottom surface of the main kettle cover 201 and the auxiliary kettle cover 202. When the kettle cover is closed, the rubber layer can provide sufficient downward pressure on the sealing spring plate 301 to improve the sealing stability of the upper and lower ends of the sealing spring plate 301. An integral rubber layer is fixedly arranged on the bottom surface of the flow channel 103 and the top surface of the sealing ring 306. When the electromagnet 305 is used to control and adjust the sealing spring plate 301, the kettle cover needs to be opened to reduce the displacement resistance of the sealing spring plate 301.

[0065] Example 2: Figure 8 As shown, on the basis of the technical solution of Example 1, two corrugated plates 303 are arranged in each circulation channel 103, and the two corrugated plates 303 are respectively located on both sides of the tension spring 302, which can enhance the sealing effect and balance the force on the tension spring 302. At the same time, an independent area without liquid flow can be isolated in the area where the tension spring 302 is located, so that when the tension spring 302 contracts or stretches, the liquid damping force is small, thereby improving the control sensitivity.

[0066] Example 3: This example provides a method for preparing an environmentally friendly biological calcium denitrifier using the preparation device in Example 1. The environmentally friendly biological calcium denitrifier in the preparation method includes the following components by weight:

[0067] Water-soluble cellulose: 20 parts, urea: 3 parts, catalyst: 20 parts, rare earth oxide: 5 parts, additive: 0.2 parts, thickener: 0.1 parts, flame retardant: 2 parts, stabilizer: 2 parts, dispersant: 1 part;

[0068] The catalyst is a mixture of calcium carbonate, manganese dioxide and manganese sulfate, and the mass ratio is: calcium carbonate: manganese dioxide: manganese sulfate = 3:1:1; the auxiliary agent is aluminum oxide; the thickener is carboxymethyl cellulose; the flame retardant is ammonium polyphosphate; the stabilizer is sodium dihydrogen phosphate; the dispersant is 12-hydroxystearic acid; the rare earth oxide is a mixture of lanthanum oxide, cerium dioxide and samarium oxide, and the mass ratio is: cerium dioxide: lanthanum oxide: samarium oxide = 1:2:1;

[0069] The method for preparing an environmentally friendly biological calcium denitrifier comprises the following steps:

[0070] S1. rare earth oxide treatment: lanthanum oxide, cerium oxide, samarium oxide and urea in the rare earth oxide are uniformly mixed and subjected to activation heat treatment to obtain a mixture;

[0071] S2, preparation of ingredient solution: using two adjacent auxiliary kettle enclosures 105 as a group, as a container for preparing one ingredient, respectively preparing an additive solution, a dispersant solution, a catalyst solution, a flame retardant solution, a thickener solution, and a stabilizer solution;

[0072] Dissolve the additive in the solvent, stir and mix well for use; dissolve the dispersant in the organic solvent, stir and mix well for use; dissolve the catalyst in the reverse osmosis pure water, stir and mix well for use; dissolve the flame retardant in the reverse osmosis concentrated brine, stir and mix well for use; dissolve the thickener in the reverse osmosis pure water, stir and mix well for use; the solvents and organic solvents used can be used as long as they can fully dissolve the corresponding substances, and the concentration can be adjusted according to needs;

[0073] S3, preparation of main material solution: prepare the main material solution by using the main kettle barrel 101, add water-soluble cellulose into the main kettle barrel 101, then add water to fully stir and dissolve, add reverse osmosis concentrated brine and polyacrylamide to the dissolved water-soluble cellulose, stir and dissolve to form the main material solution;

[0074] The water-soluble cellulose used is extracted from wheat straw;

[0075] S4, mixing and preparing: open the kettle cover, use the electromagnet 305 to control the sealing spring plate 301 to move toward the second side plate 104, so that the main kettle barrel 101 and the auxiliary kettle enclosure 105 are connected, and the displacement of the sealing spring plates 301 in different directions is controlled according to the order of adding the ingredients, so that the ingredients are mixed in order, and then the mixture prepared in S1 is added; then close the kettle cover, start the first motor 203 to drive the first stirring paddle 204 to fully mix the main ingredient solution, the ingredient solution and the mixture. During the mixing process, since the mixed solution continuously flows in and out of the auxiliary kettle enclosure 105, the mixed solution flowing out has a different flow direction from the mixed solution in the vortex flow direction of the main kettle barrel 101, which will generate turbulence, which can improve the mixing efficiency of the mixed solution in the vertical direction, and finally the denitrification agent is prepared;

[0076] S5. Shutdown for maintenance: open the valve, discharge the denitrification agent through the discharge pipe, add the cleaning solution into the main kettle barrel 101, start the first stirring paddle 204 for stirring, and clean the main kettle barrel 101 and the inner wall of the auxiliary kettle enclosure 105.

[0077] Example 4: This example provides a method for preparing an environmentally friendly biological calcium denitrifier using the preparation device in Example 1. The environmentally friendly biological calcium denitrifier in the preparation method includes the following components by weight:

[0078] Water-soluble cellulose: 30 parts, urea: 5 parts, catalyst: 30 parts, rare earth oxide: 8 parts, additive: 0.4 parts, thickener: 0.2 parts, flame retardant: 4 parts, stabilizer: 4 parts, dispersant: 3 parts;

[0079] The catalyst is a mixture of calcium carbonate, manganese dioxide and manganese sulfate, and the mass ratio is: calcium carbonate: manganese dioxide: manganese sulfate = 3:1:1; the auxiliary agent is aluminum oxide; the thickener is carboxymethyl cellulose; the flame retardant is magnesium sulfate; the stabilizer is disodium hydrogen phosphate; the dispersant is dioctyl phthalate; the rare earth oxide is a mixture of lanthanum oxide, cerium dioxide and samarium oxide, and the mass ratio is: cerium dioxide: lanthanum oxide: samarium oxide = 1:2:1;

[0080] The method for preparing an environmentally friendly biological calcium denitrifier comprises the following steps:

[0081] S1. rare earth oxide treatment: lanthanum oxide, cerium oxide, samarium oxide and urea in the rare earth oxide are uniformly mixed and subjected to activation heat treatment to obtain a mixture;

[0082] S2, preparation of ingredient solution: using two adjacent auxiliary kettle enclosures 105 as a group, as a container for preparing one ingredient, respectively preparing an additive solution, a dispersant solution, a catalyst solution, a flame retardant solution, a thickener solution, and a stabilizer solution;

[0083] Dissolve the additive in the solvent, stir and mix well for use; dissolve the dispersant in the organic solvent, stir and mix well for use; dissolve the catalyst in the reverse osmosis pure water, stir and mix well for use; dissolve the flame retardant in the reverse osmosis concentrated brine, stir and mix well for use; dissolve the thickener in the reverse osmosis pure water, stir and mix well for use; the solvents and organic solvents used can be used as long as they can fully dissolve the corresponding substances, and the concentration can be adjusted according to needs;

[0084] S3, preparation of main material solution: prepare the main material solution by using the main kettle barrel 101, add water-soluble cellulose into the main kettle barrel 101, then add water to fully stir and dissolve, add reverse osmosis concentrated brine and polyacrylamide to the dissolved water-soluble cellulose, stir and dissolve to form the main material solution;

[0085] The water-soluble cellulose used is extracted from wheat straw;

[0086] S4, mixing and preparing: open the kettle cover, use the electromagnet 305 to control the sealing spring plate 301 to move toward the second side plate 104, so that the main kettle barrel 101 and the auxiliary kettle enclosure 105 are connected, and the displacement of the sealing spring plates 301 in different directions is controlled according to the order of adding the ingredients, so that the ingredients are mixed in order, and then the mixture prepared in S1 is added; then close the kettle cover, start the first motor 203 to drive the first stirring paddle 204 to fully mix the main ingredient solution, the ingredient solution and the mixture. During the mixing process, since the mixed solution continuously flows in and out of the auxiliary kettle enclosure 105, the mixed solution flowing out has a different flow direction from the mixed solution in the vortex flow direction of the main kettle barrel 101, which will generate turbulence, which can improve the mixing efficiency of the mixed solution in the vertical direction, and finally the denitrification agent is prepared;

[0087] S5. Shutdown for maintenance: open the valve, discharge the denitrification agent through the discharge pipe, add the cleaning solution into the main kettle barrel 101, start the first stirring paddle 204 for stirring, and clean the main kettle barrel 101 and the inner wall of the auxiliary kettle enclosure 105.

[0088] Unless otherwise specified in Examples 3-4, other components and processes all adopt existing technologies.

[0089] In the denitrification efficiency test, the denitrification agent obtained in Example 3 and the denitrification agent obtained in Example 4 were placed in the flue gas channel to react with the flue gas; in the flue gas channel, the flue gas flow rate was 6-8 m / s, the flue gas temperature was 350-450°C, and the flue gas oxygen content was 3-8 VOL%. The NOx concentrations before and after the flue gas was introduced were measured respectively. The denitrification efficiency of the denitrification agent obtained in Example 3 reached 98%, and the denitrification efficiency of the denitrification agent obtained in Example 4 reached 97%.

[0090] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An environmentally friendly biological calcium denitrification agent preparation device, characterized in that: The invention comprises a petal kettle assembly as a stirring container, a power sealing assembly for providing stirring power, and a flow control assembly for controlling the flow in the internal space of the petal kettle assembly; the petal kettle assembly comprises a main kettle barrel (101); the upper part of the main kettle barrel (101) is integrally formed with at least two first side plates (102) in a ring array; the gap between adjacent first side plates (102) is a flow channel (103); a second side plate (104) is fixedly installed in the flow channel (103); the second side plate (104) is an arc surface on one side close to the axis of the main kettle barrel (101), and the arc surface is convex toward the axis of the main kettle barrel (101); the two side walls of the first side plate (102) close to the flow channel (103) are guide slopes; the angle between the guide slope and the tangent of the circle where the arc side wall of the first side plate (102) is located is less than 50°; the first side plate (102) is an arc surface. The area of ​​the inner wall is larger than the area of ​​the arc-shaped outer wall of the first side plate (102); the adjacent second side plates (104) are fixedly connected to a secondary kettle enclosure plate (105); the secondary kettle enclosure plate (105) is an arc-shaped plate structure; the arc-shaped convex surface of the secondary kettle enclosure plate (105) faces away from the axis of the main kettle barrel body (101); the bottom end of the secondary kettle enclosure plate (105) is sealed with a secondary kettle bottom plate (107), so that the interior of the secondary kettle enclosure plate (105) is surrounded by a space that is not circulated with the outside and is used for the production and preparation of the batching solution; the bottom end of the main kettle barrel body (101) is fixedly sealed with a base (106); the bottom end of the base (106) is equipped with a feed pipe that can connect the inside of the main kettle barrel body (101) with the outside, and the feed pipe is connected with a valve; the arc-shaped design of the secondary kettle enclosure plate (105) can reduce the flow resistance of the solution when it circulates between the inside of the secondary kettle enclosure plate (105) and the inside of the main kettle barrel body (101); The power sealing assembly comprises a kettle cover, which can seal the main kettle barrel body (101) and the auxiliary kettle enclosure (105); a first motor (203) and a second motor (205) are installed on the kettle cover; the first motor (203) is drivingly connected to a first stirring paddle (204); the second motor (205) is drivingly connected to a second stirring paddle (206); the first stirring paddle (204) is located in the main kettle barrel body (101); and the second stirring paddle (206) is located in the auxiliary kettle enclosure (105); The flow control assembly comprises a sealing spring plate (301) and a secondary cut-off plate installed inside the flow channel (103); the sealing spring plate (301) is capable of cutting off the flow relationship between the secondary kettle enclosure plate (105) and the main kettle barrel body (101); and the secondary cut-off plate is capable of cutting off the flow relationship between adjacent secondary kettle enclosure plates (105); The sealing spring plate (301) is an arc-shaped plate structure, the arc-shaped convex surface faces the direction of the axis of the main kettle barrel (101), the horizontal ends of the convex surface of the sealing spring plate (301) are respectively in contact with the diversion inclined surfaces of two adjacent first side plates (102), and a rubber layer is fixedly arranged on the diversion inclined surface. The flow control component also includes an iron plate (307) fixedly installed in the middle of the arc-shaped concave surface of the sealing spring plate (301), and at least two tension springs (302) fixedly connected to the side of the iron plate (307) away from the sealing spring plate (301), and one end of the tension spring (302) away from the iron plate (307) is fixedly connected to the second side plate (104). The elastic tension of the tension spring (302) can push the sealing spring plate (301) in the direction of the axis of the main kettle barrel (101), so that the two ends of the sealing spring plate (301) in the horizontal direction can be in close contact with the diversion inclined surface. The secondary truncation plate is a corrugated plate (303), one end of the corrugated plate (303) is connected and fixed to one end of the concave surface of the sealing spring plate (301) in the horizontal direction, and one end of the corrugated plate (303) away from the sealing spring plate (301) is connected and fixed to the second side plate (104), so that adjacent secondary kettle enclosure plates (105) are sealed and isolated; At least one mounting groove (304) is provided on a side wall of the second side plate (104) away from the axis of the main kettle barrel (101), and an electromagnet (305) is installed inside the mounting groove (304). The electromagnet (305), the first motor (203), and the second motor (205) are all connected to external controller signals.

2. The environmentally friendly biological calcium denitrification agent preparation device according to claim 1, characterized in that: The kettle cover comprises a main kettle cover (201) and an auxiliary kettle cover (202); the main kettle cover (201) cooperates with the main kettle barrel (101), and the auxiliary kettle cover (202) cooperates with the auxiliary kettle enclosure (105).

3. The environmentally friendly biological calcium denitrification agent preparation device according to claim 1, characterized in that: A sealing ring (306) is fixedly mounted on the inner wall of the main kettle body (101) near the bottom end of the circulation channel (103), and the top surface of the sealing ring (306) is flush with the bottom surface of the circulation channel (103).

4. The environmentally friendly biological calcium denitrification agent preparation device according to claim 1, characterized in that: The isolation layer is made of rubber.

5. The environmentally friendly biological calcium denitrification agent preparation device according to claim 1, characterized in that: Two corrugated plates (303) are arranged in each circulation channel (103), and the two corrugated plates (303) are respectively located on both sides of the tension spring (302).

6. The environmentally friendly biological calcium denitrification agent preparation device according to claim 2, characterized in that: The main kettle cover (201) and the auxiliary kettle cover (202) are integrally formed, a rubber layer is fixedly provided on the bottom surfaces of the main kettle cover (201) and the auxiliary kettle cover (202), and an integral rubber layer is fixedly provided on the bottom surface of the flow channel (103) and the top surface of the sealing ring (306).

7. A method for preparing an environmentally friendly biological calcium denitrifier, using the preparation device according to any one of claims 1 to 6, characterized in that: The environmentally friendly biological calcium denitrifier in the preparation method includes the following components by weight: Water-soluble cellulose: 20-30 parts, urea: 3-5 parts, catalyst: 20-30 parts, rare earth oxide: 5-8 parts, additive: 0.2-0.4 parts, thickener: 0.1-0.2 parts, flame retardant: 2-4 parts, stabilizer: 2-4 parts, dispersant: 1-3 parts; The method for preparing an environmentally friendly biological calcium denitrifier comprises the following steps: S1. rare earth oxide treatment: mixing rare earth oxide and urea uniformly, performing activation heat treatment, and obtaining a mixture; S2, preparation of the batching solution: using a plurality of auxiliary kettle enclosures (105) to prepare an auxiliary agent solution, a dispersant solution, a catalyst solution, a flame retardant solution, a thickener solution, and a stabilizer solution respectively; S3, preparation of the main material solution: using the main kettle barrel (101) to prepare the main material solution, adding water-soluble cellulose into the main kettle barrel (101), then adding water to fully stir and dissolve, adding reverse osmosis concentrated brine and polyacrylamide to the dissolved water-soluble cellulose, and fully stirring and dissolving to form the main material solution; S4, mixing and preparing: opening the kettle cover, using the electromagnet (305) to control the sealing spring plate (301) to move in the direction of the second side plate (104), so that the main kettle barrel (101) and the auxiliary kettle enclosure (105) are connected, and the sealing spring plates (301) are displaced in different directions according to the order in which the ingredients are added, so that the ingredients are mixed in order, and then the mixture prepared in S1 is added; then the kettle cover is closed, and the first motor (203) is started to drive the first stirring paddle (204) to fully mix the main ingredient solution, the ingredient solution and the mixture, and finally the denitrification agent is prepared; S5. Shutdown for maintenance: Open the valve, discharge the denitrification agent through the discharge pipe, add the cleaning solution into the main kettle barrel (101), start the first stirring paddle (204) for stirring, and clean the inner wall of the main kettle barrel (101) and the auxiliary kettle enclosure (105).

8. The method for preparing an environmentally friendly biological calcium denitrifier according to claim 7, characterized in that: The catalyst is a mixture of calcium carbonate, manganese dioxide and manganese sulfate, and the mass ratio is: calcium carbonate: manganese dioxide: manganese sulfate = 3:1:1; the auxiliary agent is aluminum oxide; the thickener is carboxymethyl cellulose; the flame retardant is one or more of ammonium polyphosphate and magnesium sulfate; the stabilizer is one or more of sodium dihydrogen phosphate, disodium hydrogen phosphate and trisodium phosphate; the dispersant is one or more of 12-hydroxystearic acid and dioctyl phthalate; the rare earth oxide is a mixture of lanthanum oxide, cerium dioxide and samarium oxide, and the mass ratio is: cerium dioxide: lanthanum oxide: samarium oxide = 1:2:1.

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