Preparation method and system of high-energy denitration liquid

Abstract

The invention discloses a preparation method and system of a high-energy denitration liquid, belongs to the technical field of denitration liquid preparation, and provides a solution aiming at the problems of raw material waste, non-uniform mixing, incomplete filtration, improper gas treatment, poor safety and the like existing in denitration liquid preparation in the prior art. According to the preparation method, urea soil powder liquid is prepared by controlling the temperature and stirring in a stirring kettle, the urea soil powder liquid is filtered and conveyed to a finished product storage tank, aeration circulation and pump circulation are combined for multi-stage mixing, the concentration is detected, regulated and controlled, the stirring kettle, a two-stage filtering device, the finished product storage tank and an aeration mixing device are included, and accurate proportioning is achieved through symmetrical feeding pipes. A pneumatic motor is used for driving double stirrers to be cooperatively mixed with a concentric aeration pipe, a flow field is optimized in cooperation with a flow guiding and disturbing device, meanwhile, a gas recovery system is arranged for balancing air pressure, efficient preparation of denitration liquid is achieved through transformation of an existing finished product storage tank, urea is adopted for producing waste, the resource utilization rate is increased, the mixing efficiency and purity are improved, and safety is enhanced; the operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of denitration liquid preparation, in particular to a preparation method and system of high-energy denitration liquid. BACKGROUND

[0002] In the field of industrial production, the large-scale combustion of fossil fuels such as coal and oil makes nitrogen oxides one of the main components of atmospheric pollutants. Under the background of increasingly stringent environmental protection requirements, industrial denitration technology has become a key means to control nitrogen oxide emissions, and the performance of denitration liquid as a core element directly affects the denitration effect.

[0003] In the preparation and use of denitration liquid, the existing technology exposes many problems to be solved. Taking the traditional urea preparation as an example, the raw material utilization rate is low, and there is a waste problem. If the residual urea condensate in the liquid preparation pipeline is not recycled, about 5-10L (concentration 45%) is lost per batch, the annual waste amount exceeds 3m³, and the raw material cost is about 20,000 yuan. At the same time, the residual condensate crystallizes and blocks the pipeline, increasing the cleaning workload.

[0004] Low mixing efficiency is another major problem. The conventional stirring method mostly uses single-component stirring paddles, such as anchor stirring paddles, which can only stir the materials at the bottom and periphery of the tank, and the stirring effect on the central area materials is poor, and the material flow is extremely slow. Due to uneven bubble distribution, a single aeration method often forms a bubble aggregation zone at the top of the tank, and the bottom materials are difficult to be effectively disturbed. When these two methods are used alone, it often takes more than 60 minutes to mix the materials evenly, and the local concentration deviation can be more than 5%. In this way, it directly leads to the fact that the subsequent denitration reaction cannot be fully carried out, the denitration efficiency fluctuates greatly, and it is difficult to meet the needs of industrial production for stable and efficient denitration.

[0005] Incomplete filtration is also a major problem in the preparation process of existing denitration liquid. The soil powder surface usually contains particle impurities with a particle size of 20-50μm, and if only a simple filter screen is used for filtration, these impurities are easy to enter the finished product tank with the soil powder surface liquid. In addition, new solid particles may be produced during the preparation process due to stirring impact and other factors, which will also be left in the denitration liquid. Once these impurities enter the nozzle aperture of the denitration spray gun, which is usually 1-3mm, they will quickly block the nozzle, greatly increasing the replacement frequency of the spray gun and sharply increasing the maintenance cost. More seriously, nozzle blockage will cause uneven spraying, greatly affecting the denitration effect and leading to a significant decrease in denitration efficiency.

[0006] The air pressure balance treatment is also insufficient to cause many problems in the preparation of the existing denitration liquid. When the feed is added to the closed tank, the air in the tank is extruded as the liquid level rises, and needs to be discharged through the breather valve. During the aeration and stirring process, part of the gas introduced is not dissolved and will also be discharged through the breather valve. Among these discharged gases, there is ammonia gas generated by the hydrolysis of urea, and the concentration of ammonia gas can reach 10-50 ppm. Ammonia gas has a strong irritating odor, and direct emission not only causes odor pollution and does not meet the environmental protection standard, but also forms alkaline mist by combining with the moisture in the air, which corrodes the surrounding metal equipment and greatly shortens the service life of the equipment.

[0007] In terms of safety, the traditional stirring usually uses an electric stirrer, and the motor is prone to produce electric sparks during operation. In the environment of denitration liquid preparation, due to the existence of ammonia gas and other flammable gases, once encountering electric sparks, it is easy to cause explosion accidents, which has great safety hazards. In order to meet the explosion-proof requirements, enterprises have to invest a lot of cost in explosion-proof modification, which undoubtedly increases the equipment investment and operating cost.

[0008] In summary, the existing denitration liquid technology has obvious deficiencies in raw material cost, mixing efficiency, filtering effect, air pressure balance treatment, stirring and aeration coordination, and safety, and it is difficult to meet the increasingly strict environmental protection requirements and the urgent needs of industrial production for efficient and stable denitration. Therefore, it is of great practical significance to develop a new type of high-energy denitration liquid preparation method and system to improve the denitration efficiency, reduce the operating cost and enhance the operation safety.

[0009] Therefore, the application provides a preparation method and system of high-energy denitration liquid to meet the needs. SUMMARY

[0010] The purpose of the present application is to provide a preparation method and system of high-energy denitration liquid to solve the problems of waste of raw materials, uneven mixing, incomplete filtering, improper air pressure balance gas treatment and low mixing efficiency in the preparation of the existing denitration liquid.

[0011] To achieve the above purpose, the application provides the following technical solutions:

[0012] A preparation method of high-energy denitration liquid, the method comprising the following steps:

[0013] S1, preparing a urea soil powder surface liquid: adding desalted water in a stirring kettle, controlling the temperature in the stirring kettle at 35-50℃ and stirring, adding soil powder surface in multiple times with intervals during the stirring process to avoid agglomeration, and continuously stirring for more than 30 minutes to prepare a soil powder surface liquid with a concentration of 45%-50%;

[0014] S2, material conveying: the urea powder surface liquid is sent into the finished product storage tank 1 after filtration, if there is displacement cleaning solution in the urea solution production liquid preparation pipeline, the displacement cleaning solution is added into the finished product storage tank 1, if there is no displacement cleaning solution, no addition, finally, according to the target concentration, desalted water is added into the finished product storage tank 1, the conductivity of the desalted water is ≤50 μS / cm, the displacement cleaning solution is obtained by condensate flushing displacement in the urea solution liquid preparation pipeline, the filtration precision of the urea powder surface liquid is 5-20 μm, so as to recover the residual solution in the liquid preparation system;

[0015] S3, preliminary mixing and detection: the aeration cycle is carried out for 10 minutes, then the pump cycle is carried out for 10 minutes to obtain the denitration liquid base liquid, and the concentration is detected and confirmed, according to the concentration difference, the urea powder surface liquid and the desalted water are added, the concentration of the denitration liquid is satisfied, the base liquid concentration is detected by a refractometer, if the concentration is lower than the target value of the denitration liquid, the soil powder surface liquid is supplemented, if the concentration is too high, the desalted water is supplemented, until the concentration meets the standard;

[0016] S4, final mixing: the aeration cycle is carried out for 20 minutes, then the pump cycle is carried out for 10 minutes, the denitration liquid concentration is detected and confirmed to meet the requirements, and after the standard is met, the high-energy denitration liquid is obtained.

[0017] A high-energy denitration liquid preparation system, comprising:

[0018] A stirred tank for preparing soil powder surface liquid;

[0019] A filtering device, the filtering device further comprises an inlet filter and an outlet filter, the inlet filter is used for filtering the soil powder surface liquid, and the outlet filter is used for filtering the denitration liquid, so as to improve the purity of the denitration liquid and reduce the impurity content;

[0020] A finished product storage tank for preparing the denitration liquid, a first inlet pipe, a second inlet pipe and a breathing valve are arranged on the top of the finished product storage tank, the first inlet pipe and the second inlet pipe are symmetrically arranged, a liquid level meter and an air inlet pipe are arranged on the sidewall of the finished product storage tank;

[0021] An aeration mixing device is arranged in the finished product storage tank, the aeration mixing device further comprises an aeration pipe, a pneumatic motor and a stirrer, the pneumatic motor and the stirrer are both provided in two groups and symmetrically arranged, the stirrer corresponds to the positions of the first inlet pipe and the second inlet pipe respectively, the stirrer is driven by the pneumatic motor, so as to improve the resource utilization rate and accelerate the stirring and mixing speed;

[0022] The outlet of the stirred tank is connected with the inlet of the feed filter through a pipeline, the outlet of the feed filter is connected with the second inlet pipe of the product storage tank through a pipeline, the first inlet pipe is used for conveying desalted water and displacement liquid; the aeration mixing device is connected with the gas source through an air inlet pipe, the pneumatic motor is driven by the gas source, the pneumatic motor drives the stirrer to operate, the outlet pipe is connected with the filling pipeline and the displacement pipeline through a circulating pump, the filling pipeline has two groups of branch pipes, one group of branch pipes is provided with the outlet filter, and the raw material and the denitration liquid are filtered for multiple times to ensure that the denitration liquid is pure.

[0023] Preferably, the top of the product storage tank is provided with a gas collecting hood, the gas collecting hood covers the breather valve, one side of the product storage tank is provided with an air transfer box, one end of the air transfer box is provided with a connecting bin, the connecting bin is provided with an air inlet and an air outlet, the gas collecting hood is connected with the air inlet through a pipeline, the air outlet is connected with the conveying pipeline of the gas source through a pipeline, and a one-way valve is arranged at the air outlet, the one-way valve is arranged to be communicated with the conveying pipeline of the gas source, one side of the connecting bin is provided with a bellows, the bellows is a foldable structure and can be automatically expanded and contracted according to the air volume to ensure that the air pressure at the breather valve is balanced.

[0024] Preferably, the bellows is located in the air transfer box, the inner top surface of the air transfer box is provided with an upper guide rail, the inner bottom surface of the air transfer box is provided with a lower guide rail, the end of the bellows is provided with an end plate, the top of the end plate is provided with a top plate, the bottom of the end plate is provided with a bottom plate, the top plate is provided with an upper guide wheel, the upper guide wheel is matched with the upper guide rail, the bottom plate is provided with a lower guide wheel, the lower guide wheel is matched with the lower guide rail, and the upper guide wheel and the lower guide wheel are matched with the upper guide rail and the lower guide rail, respectively, and a plurality of groups of the upper guide wheel and the lower guide wheel are symmetrically arranged to ensure that the bellows can be stably expanded and contracted to store the air escaped after aeration.

[0025] Preferably, the aeration pipe further comprises a gas supply pipe, an outer aeration pipe and an inner aeration pipe, one end of the gas supply pipe is connected with the air inlet pipe, the other end of the gas supply pipe is connected with an adapter pipe, the adapter pipe is further connected with the outer aeration pipe and the inner aeration pipe respectively, the outer aeration pipe and the inner aeration pipe are arranged on the inner bottom of the finished product storage tank, the outer aeration pipe and the inner aeration pipe are circular and concentrically arranged to ensure uniform distribution of gas bubbles, the inner bottom of the finished product storage tank is further provided with a mounting seat, the mounting seat has two groups and is symmetrically arranged, the mounting seat is further provided with a pneumatic motor, the gas supply pipe is connected with the pneumatic motor, the top of the pneumatic motor is provided with a rotating shaft, the inside of the finished product storage tank is provided with a fixing frame, the fixing frame is provided with a shaft seat for mounting the rotating shaft, the stirrer further comprises a double-curved surface stirrer and a propelling stirrer, the bottom of the rotating shaft is provided with the double-curved surface stirrer, the propelling stirrer is located above the double-curved surface stirrer, the double-curved surface stirrer generates radial liquid flow, the propelling stirrer generates axial liquid flow, and the stirring and mixing efficiency is improved.

[0026] Preferably, the inner bottom of the finished product storage tank is provided with a mounting bracket, the mounting bracket is located between the two groups of mounting seats, the mounting bracket is provided with an air inlet tee and an air outlet tee, the gas supply pipe is disconnected at the mounting bracket and the disconnected two ends are connected with the air inlet tee and the air outlet tee respectively, the other two ports of the air inlet tee are connected with the air inlet holes of the two groups of pneumatic motors through air pipes, the other two ports of the air outlet tee are connected with the air outlet holes of the two groups of pneumatic motors through air pipes, and the air source is recycled.

[0027] Preferably, the top of the mounting bracket is provided with a support, the fixing frame is provided with a support frame, the support and the support frame each have two groups and are positionally corresponding, a guide vane is rotatably connected between one group of the support and the support frame, and a spoiler is rotatably connected between the other group of the support and the support frame, the guide vane and the spoiler are perpendicular to each other and are interconnected, and the laminar flow state of the liquid flow is broken.

[0028] Preferably, the guide vane is provided with a guide beam frame and a guide frame, the guide beam frame is vertically arranged and penetrates through the guide vane, the guide frame has multiple groups and is uniformly arranged along the guide beam frame, the guide beam frame is symmetrically provided with a support rod, the support rod has multiple groups and is vertically arranged with the guide vane, the spoiler is provided with a spoiler beam frame and a spoiler frame, the spoiler beam frame is vertically arranged and penetrates through the spoiler, the spoiler frame has multiple groups and is uniformly arranged along the spoiler beam frame, the position of the spoiler frame corresponds to the position of the support rod, a connecting rod is hingedly connected between the end of the spoiler frame and the end of the support rod, the connecting rod is horizontally arranged and parallel to the guide vane, the rigidity is enhanced, and deformation is avoided.

[0029] Preferably, a maintenance opening, a waste pipe and an installation pipe are further arranged on the sidewall of the product storage tank, and a lighting opening is further arranged on the top of the product storage tank, the lighting opening corresponding to the position of the maintenance opening, the maintenance opening being used for maintenance personnel to enter the product storage tank to perform maintenance work, the waste pipe being used for emptying the product storage tank during maintenance, and the installation pipe being used for wiring when installing a liquid level alarm in the product storage tank and externally installing a pressure sensor to meet the needs of normal operation and maintenance.

[0030] In summary, the technical effects and advantages of the present application are as follows:

[0031] 1. Improved mixing efficiency: The aeration of the concentric inner and outer aeration pipes and the stirring of the hyperbolic surface + propeller stirrer work together with the liquid flow guidance of the guide plate and the spoiler to solve the problem of uneven mixing in traditional mixing, and the mixing time is shortened by more than 30%;

[0032] 2. Optimized filtration effect: Two-stage filtration of feed and discharge removes impurities in the soil powder surface liquid and residual particles in the finished product, and the purity of the denitration liquid is improved to more than 99.5%;

[0033] 3. Enhanced safety: The breather valve balances the air pressure, the gas hood and the air transfer box recover and discharge the gas to avoid direct gas discharge; the pneumatic motor drives the stirrer, which has no electrical spark risk and meets the safety requirements of denitration liquid preparation;

[0034] 4. Improved operation stability: Symmetrical feed pipe, liquid level meter and proportional control of feed quantity ensure accurate material ratio; detachable filter material and maintenance opening design facilitate equipment maintenance;

[0035] 5. Full use of raw materials and existing equipment: Technical upgrading of existing storage tanks uses urea powder and replacement clear liquid as main raw materials to fully utilize raw material equipment, create more benefits, improve raw material utilization rate and reduce production cost. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0037] Figure 1 It is a process flow diagram of the present application;

[0038] Figure 2 It is a schematic diagram of the assembly structure of the finished product storage tank and the air transfer box of the present application;

[0039] Figure 3Right view schematic diagram of the finished product storage tank and air transfer box assembly structure in the present application;

[0040] Figure 4 A-A cross-sectional structure schematic diagram of Figure 3 ;

[0041] Figure 5 Front view schematic diagram of the finished product storage tank and air transfer box assembly structure in the present application;

[0042] Figure 6 B-B cross-sectional structure schematic diagram of Figure 5 ;

[0043] Figure 7 Right view structure schematic diagram of the air transfer box in the present application

[0044] Figure 8 Internal structure schematic diagram of the air transfer box in the present application;

[0045] Figure 9 Internal structure schematic diagram of the finished product storage tank in the present application;

[0046] Figure 10 Schematic diagram of the guide plate and spoiler connecting structure in the present application;

[0047] Figure 11 Schematic diagram of the mounting rack structure in the present application.

[0048] In the figure: 1, finished product storage tank; 10, first feeding pipe; 11, second feeding pipe; 12, breather valve; 13, gas collection cover; 14, liquid level meter; 15, air inlet pipe; 16, discharge pipe; 17, maintenance opening; 18, lighting opening; 19, waste discharge pipe;

[0049] 2, gas conveying pipe; 20, transfer pipe fitting; 21, outer aeration pipe; 22, inner aeration pipe; 201, air inlet tee; 202, air outlet tee;

[0050] 3, air transfer box; 30, connecting chamber; 31, bellows; 32, end plate; 33, top plate; 34, bottom plate; 35, upper guide wheel; 36, lower guide wheel; 301, air inlet; 302, air outlet; 303, upper guide rail; 304, lower guide rail;

[0051] 4, mounting seat; 40, pneumatic motor; 41, rotating shaft; 42, hyperboloid stirrer; 43, push type stirrer;

[0052] 5, fixing frame; 50, shaft seat; 51, support;

[0053] 6, mounting rack; 60, support;

[0054] 7, deflector; 70, deflector beam frame; 71, deflector frame; 72, support rod; 73, connecting rod;

[0055] 8, spoiler; 80, spoiler beam frame; 81, spoiler frame;

[0056] 91, feed filter; 92, discharge filter. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0058] Embodiment 1:

[0059] Reference Figure 1 The preparation method of the high-energy denitration liquid shown in the figure includes the following steps:

[0060] S1, preparing urea powder surface liquid: after adding desalted water into the stirring kettle, stirring is carried out under the temperature condition of 35°C, and the urea powder surface is added in 5 times at intervals during stirring, the stirring time is 50 minutes, and the urea powder surface liquid with a concentration of 45% is prepared;

[0061] S2, material conveying: after the urea powder surface liquid is filtered, it is sent into the finished product storage tank 1, the displacement cleaning liquid existing in the urea solution production liquid preparation pipeline is added into the finished product storage tank 1, and finally the desalted water is added into the finished product storage tank 1 according to the target concentration, the displacement cleaning liquid is obtained by flushing displacement from the urea solution liquid preparation pipeline, and the filtering precision of the urea powder surface liquid is 5μm;

[0062] S3, preliminary mixing and detection: aeration circulation is carried out for 10 minutes, then pump circulation is carried out for 10 minutes to obtain the denitration liquid base liquid, and the concentration is detected and confirmed by using a refractometer, and urea powder surface liquid and desalted water are added according to the concentration difference;

[0063] S4, final mixing: aeration circulation is carried out for 20 minutes, then pump circulation is carried out for 10 minutes, the concentration of the denitration liquid is detected and confirmed by using a refractometer, and the denitration liquid is prepared.

[0064] Correspondingly, the present application also provides a preparation system of high-energy denitration liquid, which comprises:

[0065] The stirring kettle is used for preparing the urea powder surface liquid;

[0066] The filtering device further comprises a feed filter 91 and a discharge filter 92, the feed filter 91 is used for filtering the urea powder surface liquid, and the discharge filter 92 is used for filtering the denitration liquid;

[0067] The product storage tank 1 is used for preparing denitration liquid, the top of the product storage tank 1 is provided with a first feeding pipe 10, a second feeding pipe 11 and a breather valve 12, the first feeding pipe 10 and the second feeding pipe 11 are symmetrically arranged, the sidewall of the product storage tank 1 is provided with a liquid level gauge 14, an air inlet pipe 15 and a discharge pipe 16;

[0068] The aeration mixing device is located in the product storage tank 1, the aeration mixing device further comprises an aeration pipe, a pneumatic motor 40 and a stirrer, the pneumatic motor 40 and the stirrer are both two groups and are symmetrically arranged, and the stirrer corresponds to the positions of the first feeding pipe 10 and the second feeding pipe 11 respectively;

[0069] The discharge port of the stirring kettle is connected with the feeding port of a feeding filter 91 through a pipeline, the discharge port of the feeding filter 91 is connected with the second feeding pipe 11 of the product storage tank 1 through a pipeline, the first feeding pipe 10 is used for conveying desalted water and displacement liquid; the aeration mixing device is connected with an air source through the air inlet pipe 15, the pneumatic motor 40 is driven by the air source, the pneumatic motor 40 drives the stirrer to operate, the discharge pipe 16 is connected with a filling pipeline and a displacement pipeline through a circulating pump, the filling pipeline has two groups of branch pipes, one group of the branch pipes is provided with a discharge filter 92.

[0070] As one of the embodiments in the embodiment, in order to make full use of the air source and prevent the air from escaping after aeration and affecting the environment, as shown in Figures 2 to 5 and Figure 7 , Figure 8 , the top of the product storage tank 1 is provided with a gas collecting hood 13, the gas collecting hood 13 covers the breather valve 12, one side of the product storage tank 1 is provided with an air transfer box 3, one end of the air transfer box 3 is provided with a connecting bin 30, the connecting bin 30 is provided with an air inlet 301 and an air outlet 302, the gas collecting hood 13 is connected with the air inlet 301 through a pipeline, the air outlet 302 is connected with the conveying pipeline of the air source through a pipeline and is provided with a one-way valve at the air outlet 302, the flow direction of the one-way valve is towards the conveying pipeline of the air source, one side of the connecting bin 30 is provided with a bellows 31, the bellows 31 is a foldable organ structure.

[0071] As one of the embodiments in the embodiment, in order to ensure that the bellows 31 can be smoothly stretched and retracted, as shown in Figure 4 , Figure 7 , Figure 8As shown, the bellows 31 is located inside the air transfer box 3, an upper guide rail 303 is provided on the inner top surface of the air transfer box 3, a lower guide rail 304 is provided on the inner bottom surface of the air transfer box 3, an end plate 32 is provided at the end of the bellows 31, a top plate 33 is provided on the top of the end plate 32, a bottom plate 34 is provided on the bottom of the end plate 32, an upper guide wheel 35 is provided on the top plate 33, and the upper guide wheel 35 is adapted to the upper guide rail 303, a lower guide wheel 36 is provided on the bottom plate 34, and the lower guide wheel 36 is adapted to the lower guide rail 304, and there are multiple sets of upper guide wheels 35 and lower guide wheels 36 and they are symmetrically arranged.

[0072] As an implementation method in this embodiment, in order to ensure the aeration area and make full use of the air source, Figure 4 、 Figure 6 、 Figure 9 As shown, the aeration pipe also includes an air delivery pipe 2, an external aeration pipe 21 and an internal aeration pipe 22. One end of the air delivery pipe 2 is connected to the air inlet pipe 15, and the other end of the air delivery pipe 2 is connected to a switching pipe 20. The switching pipe 20 is also connected to the external aeration pipe 21 and the internal aeration pipe 22 respectively. The external aeration pipe 21 and the internal aeration pipe 22 are both arranged at the inner bottom of the finished product storage tank 1. The external aeration pipe 21 and the internal aeration pipe 22 are both circular and concentrically arranged. The inner bottom of the finished product storage tank 1 is also provided with a mounting seat 4. There are two groups of mounting seats 4 and they are symmetrically arranged. Each mounting seat 4 is provided with an air motor 40. The air pipe 2 is connected to the air motor 40. A rotating shaft 41 is provided on the top of the air motor 40. A fixing frame 5 is provided inside the finished product storage tank 1. The fixing frame 5 is provided with a shaft seat 50 for installing the rotating shaft 41. The agitator also includes a hyperbolic agitator 42 and a propeller agitator 43. A hyperbolic agitator 42 is provided at the bottom of the rotating shaft 41, and the propeller agitator 43 is located above the hyperbolic agitator 42.

[0073] As an implementation method in this embodiment, in order to facilitate the connection and installation of the air pipe 2 and the air motor 40, as shown in FIG. Figure 6 、 Figure 11 As shown, a mounting bracket 6 is provided at the inner bottom of the finished product storage tank 1, and the mounting bracket 6 is located between the two groups of mounting seats 4. An air intake tee 201 and an exhaust tee 202 are provided on the mounting bracket 6. The air supply pipe 2 is disconnected at the mounting bracket 6 and the two ends of the disconnection are respectively connected to the air intake tee 201 and the exhaust tee 202. The other two ports of the air intake tee 201 are connected to the air intake holes of the two groups of pneumatic motors 40 through air pipes, and the other two ports of the exhaust tee 202 are connected to the exhaust holes of the two groups of pneumatic motors 40 through air pipes.

[0074] As an implementation method in this embodiment, in order to improve the material mixing efficiency, Figure 4 、 Figure 9 、 Figure 11As shown in the figure, the top of the mounting frame 6 is provided with supports 60, and the fixed frame 5 is provided with supports 51, and the supports 60 and the supports 51 are both provided with two groups and are in corresponding positions, one group of supports 60 and supports 51 are rotatably connected with the flow guide plate 7, and the other group of supports 60 and supports 51 are rotatably connected with the spoiler 8, and the flow guide plate 7 and the spoiler 8 are perpendicular to each other and are interconnected.

[0075] As an embodiment in the present embodiment, in order to enhance the structural strength of the flow guide plate 7 and the spoiler 8, and to make the liquid flow generated by stirring self-turbulent, as shown in the figure, Figure 10 As shown in the figure, the flow guide plate 7 is provided with flow guide beam frames 70 and flow guide frames 71, the flow guide beam frames 70 are vertically arranged and penetrate through the flow guide plate 7, the flow guide frames 71 are provided in multiple groups and are uniformly arranged along the flow guide beam frames 70, the flow guide beam frames 70 are symmetrically provided with support rods 72, the support rods 72 are provided in multiple groups and are vertically arranged with the flow guide plate 7, the spoiler 8 is provided with spoiler beam frames 80 and spoiler frames 81, the spoiler beam frames 80 are vertically arranged and penetrate through the spoiler 8, the spoiler frames 81 are provided in multiple groups and are uniformly arranged along the spoiler beam frames 80, the spoiler frames 81 correspond to the positions of the support rods 72, and the ends of the spoiler frames 81 and the support rods 72 are hingedly connected with connecting rods 73, the connecting rods 73 are horizontally arranged and are parallel to the flow guide plate 7.

[0076] As an embodiment in the present embodiment, in order to facilitate the installation and maintenance of the accessories of the finished product storage tank 1, as shown in the figure, Figures 2 to 5 As shown in the figure, the side wall of the finished product storage tank 1 is also provided with a maintenance opening 17, a waste pipe 19 and a mounting pipe, and the top of the finished product storage tank 1 is also provided with an illumination opening 18, the illumination opening 18 corresponds to the position of the maintenance opening 17, the maintenance opening 17 is used for maintenance personnel to enter the finished product storage tank 1 to carry out maintenance work, the waste pipe 19 is used for emptying the finished product storage tank 1 during maintenance, and the mounting pipe is used for wiring when installing the liquid level alarm in the finished product storage tank 1 and installing the pressure sensor externally.

[0077] Embodiment 2:

[0078] The difference between the present embodiment and embodiment 1 is that after the desalted water is added to the stirring kettle, stirring is carried out at a temperature of 50℃, and the soil powder surface is added in three times at intervals during stirring, and the stirring time is 30 minutes, and a urea powder surface liquid with a concentration of 50% is prepared; the filtering accuracy of the urea powder surface liquid is 20μm.

[0079] Embodiment 3:

[0080] The difference between the present embodiment and embodiment 1 is that after the desalted water is added to the stirring kettle, stirring is carried out at a temperature of 40℃, and the soil powder surface is added in four times at intervals during stirring, and the stirring time is 40 minutes, and a urea powder surface liquid with a concentration of 48% is prepared; the filtering accuracy of the urea powder surface liquid is 12μm.

[0081] The working principle of the preparation system of the present application:

[0082] S1, the stirred tank is added with high-purity water and heated to 35-50℃ to dissolve the urea powder surface, the urea powder surface is added into the stirred tank in 3-5 times after the stirred tank is started, and stirred for more than 30 minutes to prepare a urea powder surface liquid with a concentration of 45%-50%;

[0083] S2, the urea powder surface liquid is filtered through the feed filter 91 and sent into the finished product storage tank 1 from the second feed pipe 11, and the displacement clear liquid and desalted water are added into the finished product storage tank 1 through the first feed pipe 10 to perform preliminary preparation;

[0084] S3. Open the valve on the air source pipeline. The purified compressed air delivered by the air source enters the air delivery pipe 2 through the air inlet pipe 15, and then enters the inner cavity of the air motor 40 through the air inlet tee 201 on the mounting frame 6. After driving the air motor 40 to rotate, it returns to the air delivery pipe 2 through the exhaust tee 202, and enters the outer aeration pipe 21 and the inner aeration pipe 22 respectively through the adapter pipe 20, and escapes from the walls of the two pipes to aerate the mixed liquid in the finished product storage tank 1. The aeration time is 10 minutes, and then the air source is turned off and switched to the discharge pipe 16 and the replacement clear liquid delivery pipe. The pipeline between them is connected, and the circulation pump on the pipeline is started. The pump circulates for 10 minutes. The denitrification liquid base liquid obtained after the circulation is detected by a refractometer. Urea powder surface liquid and desalted water are added according to the concentration difference to meet the product concentration requirements. In this process, the mounting seat 4 provides an installation space for the pneumatic motor 40. The shaft seat 50 on the fixing frame 5 is installed with the rotating shaft 41 to ensure the stable rotation of the rotating shaft 41. The pneumatic motor 40 drives the rotating shaft 41 to rotate, driving the hyperbolic stirrer 42 and the propeller stirrer 43 to rotate. The hyperbolic stirrer 42 drives the mixed liquid to perform radial circulation flow. The propulsion agitator 43 drives the mixed liquid to flow along the axial direction, so that the mixed liquid flows in multiple directions and combines with the outer aeration pipe 21 and the inner aeration pipe 22 at the bottom to produce a composite mixing effect of stirring and aeration. In this process, the mixed liquid will push the guide plate 7 and the spoiler 8 installed between the bracket 51 and the support 60 to move, so that the liquid flow flowing around the two rotating shafts 41 is deflected, so that the liquid flows around the two rotating shafts 41 are mixed with each other. The specific method is that when the liquid pushes the spoiler 8 to deflect clockwise, the spoiler frame 81 drives the support 51 through the connecting rod 73. The rod 72 is also deflected clockwise, so that the liquid flow between the two rotating shafts 41 changes direction twice through the guide plate 7 and the spoiler 8, further enhancing the liquid mixing effect. Due to the orientation of the guide plate 7, the guide plate 7 will automatically return to the center when the mixed liquid flows, driving the spoiler 8 to return to the center, so that the spoiler 8 rotates irregularly under the dual action of the liquid flow and the guide plate 7, thereby enhancing the mixing effect. The guide beam 70, the guide frame 71, the spoiler beam 80, and the spoiler frame 81 can enhance the structural strength of the guide plate 7 and the spoiler 8, thereby extending the service life.When aeration is in progress, air escapes from the mixed solution and gathers at the top of the product storage tank 1, when the pressure relief standard of the breather valve 12 is reached, air is discharged from the breather valve 12 into the gas hood 13, with the continuous progress of aeration, air in the gas hood 13 enters the connecting bin 30 through the air inlet 301 along the pipeline, and with the increase of the volume of air, the end plate 32 moves in the air in the wind box 3, the upper guide wheel 35 on the top plate 33 cooperates with the upper guide rail 303, the lower guide wheel 36 at the bottom of the bottom plate 34 cooperates with the lower guide rail 304, so that the end plate 32 remains vertical, and the friction when the end plate 32 moves is reduced, so that the wind box 31 expands with the air entering, thereby preventing the air of the mixed denitration solution from being discharged to the outside, and the air can also be transported to the air source through the air outlet 302 for reuse, and when the pressure in the product storage tank 1 is too low, the air in the wind box 31 can enter the product storage tank 1 from the breather valve 12 again, to ensure the normal work of the breather valve 12 and the normal pressure in the product storage tank 1.

[0085] S4, after determining the concentration through S3, aeration is carried out for 20 minutes, then pump circulation is carried out for 10 minutes, then the refractometer is used to detect and confirm that the concentration of the denitration solution meets the requirements, and high-energy denitration solution is prepared; then the filling pipeline can be switched to make the high-energy denitration solution filtered through the discharge filter 92 and then filled.

[0086] The liquid level meter 14 on the product storage tank 1 is convenient for observing the internal liquid level, the maintenance opening 17 is convenient for the operator to maintain, the lighting opening 18 can be opened during maintenance to provide illumination for the inside of the product storage tank 1, and the waste discharge pipe 19 can be opened during maintenance to completely discharge the liquid in the product storage tank 1.

[0087] The electrical connection involved in the present application is a common means adopted by those skilled in the art, and technical inspiration can be obtained through a limited number of tests, which belongs to the common general knowledge.

[0088] The components not described in detail herein are prior art.

[0089] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing a high-energy denitrification liquid, characterized in that: The following steps are involved: S1, preparation of urea powder liquid: after adding high-purity water in a stirred tank, stirring at a temperature of 35-50 ° C, adding soil powder 3-5 times at intervals during stirring, stirring time more than 30 minutes, to obtain a concentration of 45%-50% urea powder liquid; S2. Material transportation: The urea powder surface liquid is filtered and then sent to the finished product storage tank (1). If there is a replacement clear liquid in the urea solution production distribution pipeline, the replacement clear liquid is added to the finished product storage tank (1). If there is no replacement clear liquid, no replacement liquid is added. Finally, desalted water is added to the finished product storage tank (1) according to the target concentration. The replacement clear liquid is obtained by flushing and replacing the condensate in the urea solution distribution pipeline; S3. Preliminary mixing and testing: aeration cycle is performed for 10 minutes, followed by pump circulation for 10 minutes to obtain the denitrification base liquid, and the concentration is tested to confirm. Urea powder solution and desalted water are added according to the concentration difference; S4, final mixing: perform aeration circulation for 20 minutes, then pump circulation for 10 minutes, test and confirm that the concentration of the denitrification liquid meets the requirements, and obtain the denitrification liquid.

2. The method for preparing a high-energy denitrification liquid according to claim 1, wherein: In step S2, the urea powder solution is filtered to a precision of 5-20 μm.

3. A high-energy denitrification liquid preparation system, characterized in that: include: A stirring kettle, which is used to prepare soil powder liquid; A filtering device, the filtering device further comprising a feed filter (91) and a discharge filter (92), the feed filter (91) being used to filter the soil powder surface liquid, and the discharge filter (92) being used to filter the denitrification liquid; A finished product storage tank (1), the finished product storage tank being used for preparing a denitrification liquid, wherein a first feed pipe (10), a second feed pipe (11) and a breathing valve (12) are provided on the top of the finished product storage tank (1), the first feed pipe (10) and the second feed pipe (11) being symmetrically arranged, and a liquid level gauge (14), an air inlet pipe (15) and a discharge pipe (16) are provided on the side wall of the finished product storage tank (1); an aeration and mixing device, the aeration and mixing device being located inside the finished product storage tank (1), the aeration and mixing device further comprising an aeration pipe, an air motor (40) and an agitator, the air motor (40) and the agitator both being provided in two groups and being symmetrically arranged, and the agitators corresponding to the positions of the first feed pipe (10) and the second feed pipe (11), respectively; The discharge port of the stirring tank is connected to the feed port of the feed filter (91) through a pipeline, and the discharge port of the feed filter (91) is connected to the second feed pipe (11) of the finished product storage tank (1) through a pipeline. The first feed pipe (10) is used to transport desalted water and replace clear liquid; the aeration mixing device is connected to the air source through the air inlet pipe (15), and the pneumatic motor (40) is driven by the air source. The pneumatic motor (40) drives the stirrer to operate. The discharge pipe (16) is connected to the filling pipeline and the replacement pipeline through a circulation pump. The filling pipeline has two groups of branch pipes, and the discharge filter (92) is provided on one group of branch pipes.

4. A high-energy denitrification liquid preparation system according to claim 3, characterized in that: The top of the finished product storage tank (1) is provided with an air collecting hood (13), and the air collecting hood (13) is provided on the breathing valve (12). An air transfer box (3) is provided on the side of the finished product storage tank (1), and a connecting chamber (30) is provided at one end of the air transfer box (3). An air inlet (301) and an exhaust port (302) are provided on the connecting chamber (30). The air collecting hood (13) is connected to the air inlet (301) through a pipeline, and the exhaust port (302) is connected to the delivery pipeline of the gas source through a pipeline, and a one-way valve is provided at the exhaust port (302). The flow direction of the one-way valve is toward the delivery pipeline of the gas source. A bellows (31) is provided on one side of the connecting chamber (30), and the bellows (31) is a foldable structure.

5. A high-energy denitrification liquid preparation system according to claim 4, characterized in that: The bellows (31) is located inside the air transfer box (3), an upper guide rail (303) is provided on the inner top surface of the air transfer box (3), a lower guide rail (304) is provided on the inner bottom surface of the air transfer box (3), an end plate (32) is provided at the end of the bellows (31), a top plate (33) is provided on the top of the end plate (32), a bottom plate (34) is provided on the bottom of the end plate (32), an upper guide wheel (35) is provided on the top plate (33), the upper guide wheel (35) is adapted to the upper guide rail (303), a lower guide wheel (36) is provided on the bottom plate (34), the lower guide wheel (36) is adapted to the lower guide rail (304), and there are multiple sets of the upper guide wheels (35) and the lower guide wheels (36) are symmetrically arranged.

6. A high-energy denitrification liquid preparation system according to claim 3, characterized in that: The aeration pipe further comprises an air delivery pipe (2), an external aeration pipe (21) and an internal aeration pipe (22). One end of the air delivery pipe (2) is connected to the air inlet pipe (15), and the other end of the air delivery pipe (2) is connected to a transition pipe (20). The transition pipe (20) is also connected to the external aeration pipe (21) and the internal aeration pipe (22), respectively. The external aeration pipe (21) and the internal aeration pipe (22) are both arranged at the inner bottom of the finished product storage tank (1). The external aeration pipe (21) and the internal aeration pipe (22) are both circular and concentrically arranged. The inner bottom of the finished product storage tank (1) is also provided with a mounting seat (4). There are two groups of mounting seats (4) and they are symmetrically arranged. The mounting seats (4) are each provided with an air motor (40). The air supply pipe (2) is connected to the air motor (40). A rotating shaft (41) is provided on the top of the air motor (40). A fixing frame (5) is provided inside the finished product storage tank (1). The fixing frame (5) is provided with a shaft seat (50) for installing the rotating shaft (41). The agitator further includes a hyperbolic agitator (42) and a propeller agitator (43). The bottom of the rotating shaft (41) is provided with the hyperbolic agitator (42), and the propeller agitator (43) is located above the hyperbolic agitator (42).

7. A high-energy denitrification liquid preparation system according to claim 6, characterized in that: The inner bottom of the finished product storage tank (1) is provided with a mounting frame (6), the mounting frame (6) is located between the two groups of mounting seats (4), and an air intake tee (201) and an exhaust tee (202) are provided on the mounting frame (6). The air supply pipe (2) is disconnected at the mounting frame (6), and the two ends of the disconnection are respectively connected to the air intake tee (201) and the exhaust tee (202). The other two ports of the air intake tee (201) are connected to the air intake holes of the two groups of pneumatic motors (40) through air pipes, and the other two ports of the exhaust tee (202) are connected to the exhaust holes of the two groups of pneumatic motors (40) through air pipes.

8. A high-energy denitrification liquid preparation system according to claim 7, characterized in that: A support (60) is provided on the top of the mounting frame (6), and a bracket (51) is provided on the fixing frame (5). The support (60) and the bracket (51) are provided in two groups and are positioned correspondingly. A guide plate (7) is rotatably connected between one group of the support (60) and the bracket (51), and a spoiler (8) is rotatably connected between the other group of the support (60) and the bracket (51). The guide plate (7) and the spoiler (8) are perpendicular to each other and are linked to each other.

9. A high-energy denitrification liquid preparation system according to claim 8, characterized in that: The guide plate (7) is provided with a guide beam (70) and a guide frame (71), the guide beam (70) is vertically arranged and passes through the guide plate (7), the guide frame (71) has multiple groups and is evenly arranged along the guide beam (70), the guide beam (70) is symmetrically provided with support rods (72), the support rods (72) have multiple groups and are vertically arranged with the guide plate (7), the spoiler (8) is provided with a spoiler beam (80) and a A spoiler frame (81), the spoiler beam (80) is vertically arranged and passes through the spoiler plate (8), the spoiler frame (81) has multiple groups and is evenly arranged along the spoiler beam (80), the spoiler frame (81) corresponds to the position of the support rod (72), a connecting rod (73) is hinged between the spoiler frame (81) and the end of the support rod (72), and the connecting rod (73) is horizontally arranged and parallel to the guide plate (7).

10. A high-energy denitrification liquid preparation system according to claim 3, characterized in that: The side wall of the finished product storage tank (1) is also provided with a maintenance port (17), a waste pipe (19) and an installation pipe. The top of the finished product storage tank (1) is also provided with a lighting port (18). The lighting port (18) corresponds to the position of the maintenance port (17). The maintenance port (17) is used for maintenance personnel to enter the finished product storage tank (1) to perform maintenance work. The waste pipe (19) is used to empty the finished product storage tank (1) during maintenance. The installation pipe is used for routing when installing a liquid level alarm in the finished product storage tank (1) and for installing a pressure sensor externally.

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