HAC calcium-based desulfurization Venturi injection device

Abstract

The invention discloses an HAC calcium-based desulfurization Venturi injection device, relates to the technical field of flue gas treatment, and aims to improve the dispersion effect and desulfurization efficiency of desulfurization reactants and flue gas. The device comprises a smoke inlet pipe, a smoke outlet pipe and a venturi mixer, a diffusion assembly and a reaction assembly are arranged in the venturi mixer, and desulfurization reactants are dispersed to the maximum extent in an acceleration narrow opening through a through hole in a negative pressure bin and rotary jet airflow of a rotary drum. According to the device, the flow control valve is used for adjusting the backflow flue gas amount, secondary mixing of flue gas and reactants is achieved through the main flow channel and the auxiliary flow channel, and the uniformity and efficiency of the desulfurization reaction are effectively improved. According to the scheme, accurate feeding of reactants is guaranteed, efficient and stable operation can be kept under different working conditions, and good energy-saving and environment-friendly effects are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to a HAC calcium-based desulfurization Venturi injection device. Background Art

[0002] Existing desulfurization technologies usually remove sulfides from flue gas by directly spraying desulfurization reactants (HAC) into flue gas and utilizing the contact reaction between flue gas and desulfurization reactants (HAC). However, in traditional injection devices, the dispersion effect of desulfurization reactants is poor and they cannot be evenly distributed in the flue gas, resulting in incomplete desulfurization reaction. Multiple stages of repeated contact reactions are often required, which affects the overall desulfurization efficiency. Especially in the case of high flow rate and large flue gas volume, due to inaccurate airflow control, desulfurization reactants (HAC) are prone to local aggregation or fail to fully participate in the reaction, resulting in the waste of some reactants and a decrease in the desulfurization effect. In addition, the delivery of desulfurization reactants (HAC) in the prior art is often relatively extensive, and it is impossible to accurately adjust the feed rate and airflow distribution according to different working conditions, which not only increases the energy consumption of the equipment, but also limits the adaptability and stability of the device under different operating conditions.

[0003] In the application of structures such as Venturi mixers, although the airflow acceleration and negative pressure effect can be used to a certain extent to improve the mixing efficiency of gas and desulfurization reactants, it still has the defects of uneven distribution of desulfurization reactants, imprecise airflow control, and difficulty in effective operation under high flow conditions. In the prior art, most devices rely on mechanical structures such as impellers to disperse the airflow (there are also methods that use motors as power, which are relatively more controllable and have faster intelligent control response). Although the desulfurization efficiency can be partially improved, due to the single dispersion method, the mixing effect of the airflow and reactants is relatively limited, resulting in difficulty in achieving efficient and uniform desulfurization reactions under different power conditions. Therefore, there is an urgent need for an improved device that can accurately control the distribution of airflow and reactants to improve the desulfurization efficiency and adapt to different operating conditions.

[0004] Based on the above problems, this scheme designs a desulfurization device based on the Venturi effect. By introducing structures such as a negative pressure chamber, a rotating jet airflow and a multi-channel flow channel, it achieves precise control of the dispersion and mixing of desulfurization reactants and flue gas, solving the problems of low desulfurization efficiency, waste of reactants and poor adaptability in the existing technology.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a HAC calcium-based desulfurization Venturi injection device, comprising a smoke inlet pipe, a smoke outlet pipe is arranged on the other side of the smoke inlet pipe, and a Venturi mixer is arranged at the opposite end of the smoke inlet pipe and the smoke outlet pipe;

[0007] The inner wall of the Venturi mixer is penetrated by a diffusion component for uniformly dispersing and transmitting the desulfurization reactants, one end of the diffusion component is fixedly connected to a reaction component for driving the diffusion component to rotate, and the reaction component is arranged on the inner wall of the Venturi mixer;

[0008] The two sides of the Venturi mixer are symmetrically provided with a feed port and a reflux port, the feed port is connected with a feed pipe, a silo for feeding the Venturi mixer is provided above the Venturi mixer, and the discharge port of the silo is connected with the top of the feed pipe;

[0009] A return pipe is provided on the surface of the return port, and the return pipe is connected to the side wall of the smoke outlet pipe.

[0010] Preferably, the venturi mixer includes a base, a pressure chamber is opened at the right end of the base, a diffusion chamber is opened at the left end of the base, and a speed-increasing narrow opening that is interconnected is opened on the side opposite to the pressure chamber, and the ends opposite to the diffusion chamber and the pressure chamber are both arranged in a bucket shape.

[0011] Preferably, a base is fixedly connected to the lower surface of the Venturi mixer, and a plurality of columns flush with the base are provided on the side wall of the silo.

[0012] Preferably, an annular flow channel is provided on the surface of the base, a negative pressure chamber is axially provided on the right side of the speed increasing narrow opening, the right inner wall of the negative pressure chamber is connected with a main flow channel and two auxiliary flow channels, the main flow channel and the two auxiliary flow channels are connected and arranged on the inner wall of the annular flow channel, and the main flow channel and the two auxiliary flow channels are arranged in an inclined shape.

[0013] Preferably, a flow control valve is provided between the reflux pipe and the reflux port.

[0014] Preferably, a rotating drum is axially penetrated and rotated on one side of the negative pressure chamber, one end of the rotating drum is fixedly connected to the reaction assembly, and a confluence bucket is arranged on the other end of the rotating drum;

[0015] The arc-shaped side wall of the rotating drum is provided with a plurality of through holes and a plurality of grinding grooves, and the rotating drum is rotationally matched with the inner wall of the confluence bucket through a rotating seat.

[0016] Preferably, the reaction assembly includes a rotating shaft fixedly connected to one end of the diffusion assembly, one end of the rotating shaft is fixedly connected to an impeller, a support sleeve is rotated through the surface of the rotating shaft, a support seat is fixedly connected to the surface of the support sleeve, and the support seat is fixedly connected to the inner wall of the speed increase narrow mouth.

[0017] Preferably, the through hole is located at the left opening of the negative pressure chamber and is opened in an inclined shape, and the grinding groove is arranged on the inner wall of the negative pressure chamber.

[0018] Preferably, the smoke outlet pipe and the opposite surface of the venturi mixer are jointly provided with a connector, the connector is fixedly connected to the bottom end of the smoke outlet pipe, and the connector is sealed and attached to one end of the venturi mixer.

[0019] Preferably, a plurality of fins are fixedly connected to the surface of the confluence hopper, and the fins jointly fix the inner wall of the pressure chamber.

[0020] Beneficial effects:

[0021] This solution uses the through hole on one side of the negative pressure bin to cooperate with the rotating jet airflow of the drum to maximize the dispersion of the desulfurization reactants in the speed-increasing narrow mouth. This design breaks the traditional dispersion method that only relies on direct injection and airflow mixing through the rotating injection method, effectively increasing the contact area between the desulfurization reactants and the flue gas, so that the reactants can be more evenly distributed in the high-speed airflow, thus ensuring that the desulfurization reactants are more evenly distributed during the entire mixing process, improving the reaction efficiency, and avoiding the decline in desulfurization effect due to uneven dispersion;

[0022] Through the speed-increasing narrow mouth design of the Venturi mixer, a low-pressure environment is formed in the negative pressure chamber when the airflow passes through this area at high speed, thereby effectively controlling the flow of airflow. The existence of the negative pressure chamber not only enhances the flue gas guidance and adsorption capacity, but also accurately adjusts the amount of reflux flue gas through the flow control valve, achieving the best reaction conditions under different working conditions. This negative pressure environment regulation enables the desulfurization reactants and flue gas to always maintain efficient mixing under different flow rates and pressure conditions, thereby maximizing the desulfurization efficiency;

[0023] Through the combined design of the annular flow channel, the main flow channel and the auxiliary flow channel, the reflux flue gas carries part of the desulfurization reactants that have not fully reacted and re-enters the negative pressure chamber for secondary reaction. This design allows the desulfurization reactants that are not completely consumed after the first reaction to be reused, significantly improving resource utilization. At the same time, with the precise control of the flow control valve, the accuracy of reactant feeding is guaranteed, so that it can still ensure the adaptability of the feeding rate under large flue gas volume or high power conditions, thereby avoiding the waste of raw materials and fluctuations in desulfurization efficiency;

[0024] The dual-channel design of the main channel and the auxiliary channel allows the airflow under different power conditions to be flexibly distributed in the main channel and the auxiliary channel, ensuring that the desulfurization reactants can still be fully dispersed at high flow rates. The setting of the main and auxiliary channels solves the defect that a single airflow path is difficult to handle large-flow flue gas, ensuring efficient reaction under high-flow conditions, thereby achieving the stability of the desulfurization reaction under various working conditions;

[0025] Through the combined design of the speed-increasing narrow port, through holes, rotating drum and impeller, the impeller is driven to rotate when the airflow passes through the speed-increasing narrow port at high speed, so that its rotating shaft rotates with the rotating drum. The through holes on the surface of the rotating drum spray out airflow when rotating. Combined with the rotation of the impeller, efficient and uniform dispersion of the desulfurization reactants is achieved, and further cutting of the airflow and the reactants are fully mixed. The rotation of the impeller not only increases the kinetic energy of the airflow, but also makes the reactants evenly mixed and fully react in the diffusion chamber, thereby enhancing the mixing effect of the reactants and the flue gas and ensuring the full progress of the desulfurization reaction.

[0026] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In the attached picture:

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0029] Figure 2 It is a three-dimensional structural schematic diagram of the present invention from another viewing angle;

[0030] Figure 3 It is a schematic diagram of a three-dimensional cross-sectional structure of the Venturi mixer of the present invention;

[0031] Figure 4 It is a three-dimensional structural schematic diagram of the diffusion component of the present invention;

[0032] Figure 5 It is a schematic structural diagram of the venturi mixer of the present invention from another perspective;

[0033] Figure 6 It is a structural schematic diagram of the right side view of the Venturi mixer of the present invention;

[0034] Figure 7 It is a schematic structural diagram of the venturi mixer of the present invention from the left.

[0035] In the figure: 1. smoke inlet pipe; 2. Venturi mixer; 21. base; 22. pressure chamber; 23. speed increasing narrow mouth; 24. diffusion chamber; 25. main flow channel; 26. auxiliary flow channel; 27. negative pressure chamber; 28. annular flow channel; 3. diffusion component; 31. rotating drum; 32. through hole; 33. grinding groove; 34. confluence bucket; 35. rotating seat; 4. reaction component; 41. rotating shaft; 42. impeller; 43. support sleeve; 44. support seat; 5. connector; 6. smoke outlet pipe; 7. feed pipe; 8. silo; 9. return pipe; 10. flow control valve; 11. feed port; 12. return port; 13. base; 14. column; 15. fin. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention.

[0037] like Figures 1 to 7 As shown, a HAC calcium-based desulfurization Venturi injection device comprises a smoke inlet pipe 1, a smoke outlet pipe 6 is arranged on the other side of the smoke inlet pipe 1, and a Venturi mixer 2 is arranged at the opposite ends of the smoke inlet pipe 1 and the smoke outlet pipe 6;

[0038] The inner wall of the venturi mixer 2 is penetrated by a diffusion component 3 for uniformly dispersing and transmitting the desulfurization reactants, one end of the diffusion component 3 is fixedly connected to a reaction component 4 for driving the diffusion component 3 to rotate, and the reaction component 4 is arranged on the inner wall of the venturi mixer 2;

[0039] A feed port 11 and a reflux port 12 are symmetrically arranged on both sides of the venturi mixer 2. The feed port 11 is connected to a feed pipe 7. A silo 8 for feeding the venturi mixer 2 is arranged above the venturi mixer 2. The discharge port of the silo 8 is connected to the top of the feed pipe 7.

[0040] A reflux pipe 9 is provided on the surface of the reflux port 12 , and the reflux pipe 9 is connected to the side wall of the smoke outlet pipe 6 .

[0041] The device achieves maximum dispersion of the desulfurization reactants in the speed increasing narrow opening 23 by means of the through hole 32 provided on one side of the negative pressure chamber 27 and the rotating jet airflow of the drum 31. Compared with the traditional impeller 42 structure, the rotating jet airflow can further enhance the distribution uniformity of the desulfurization reactants in the high-speed airflow, so that the reactants can be fully diffused in the flue gas and fully contacted with the flue gas, thereby improving the desulfurization efficiency and avoiding the waste of reactants or the problem of local excessive delivery.

[0042] The device accurately adjusts the flow rate of the reflux flue gas by setting a flow control valve 10, so that the reflux flue gas and the desulfurization reactants are mixed for the second time. Through the main flow channel 25 and the auxiliary flow channel 26, the flue gas and the reactants evenly enter the negative pressure chamber 27. This multi-level mixing method further increases the contact area and reaction efficiency of the reactants and flue gas. Especially under high flow conditions, the secondary mixing ensures the full distribution of the reactants and significantly improves the desulfurization effect.

[0043] This solution designs structures such as the speed-increasing narrow opening 23, the negative pressure chamber 27, the main flow channel 25 and the auxiliary flow channel 26, which can adaptively adjust the delivery and dispersion rate of the desulfurization reactants according to different flue gas flow rates. When the flue gas flow rate increases, the flow rate of the speed-increasing narrow opening 23 increases accordingly, and the pressure in the negative pressure chamber 27 is further reduced, pushing more reflux flue gas and reactants into the negative pressure chamber 27 through the auxiliary flow channel 26 to achieve a uniform desulfurization reaction. This dynamic adaptability enables the device to maintain efficient and stable operation under different working conditions, improving the versatility and adaptability of the desulfurization device.

[0044] Since the device can accurately control the amount of desulfurization reactants according to the changes in flue gas flow, and ensure the efficient dispersion of reactants by rotating the jet airflow, it avoids the waste caused by excessive reactants in traditional devices. At the same time, the device can complete the efficient airflow mixing and reactant dispersion process at a lower energy consumption, reducing energy consumption during operation.

[0045] The venturi mixer 2 structure is adopted, and the built-in reaction component 4, rotary injection system and multi-channel design reduce the dependence on external mechanical components and make the structure more compact. This design not only improves the overall efficiency of the system, but also simplifies operation and maintenance and reduces the failure rate. The equipment can realize complex desulfurization processes in a relatively small space and is suitable for industrial applications of various scales.

[0046] It can effectively control the sulfide content in the flue gas, improve the desulfurization effect, reduce the emission of harmful gases, and meet environmental protection requirements. Through the reuse design of the reflux flue gas, the exhaust gas emission is reduced, the environmental protection benefits are further improved, and it can adapt to more stringent environmental protection policies and standards.

[0047] Specifically, Figure 3 As shown: the venturi mixer 2 includes a base 21, a pressure chamber 22 is provided at the right end of the base 21, a diffusion chamber 24 is provided at the left end of the base 21, a speed increasing narrow opening 23 which is connected to each other is provided at the side of the diffusion chamber 24 which is opposite to the pressure chamber 22, and the ends of the diffusion chamber 24 which are opposite to the pressure chamber 22 are both arranged in a bucket shape. An annular flow channel 28 is provided on the surface of the base 21, a negative pressure chamber 27 is axially provided on the right side of the speed increasing narrow opening 23, a main flow channel 25 and two auxiliary flow channels 26 are connected to the right inner wall of the negative pressure chamber 27, the main flow channel 25 and the two auxiliary flow channels 26 are both connected and arranged on the inner wall of the annular flow channel 28, and the main flow channel 25 and the two auxiliary flow channels 26 are both arranged in an inclined shape.

[0048] By setting the pressure chamber 22, the speed-increasing narrow opening 23 and the diffusion chamber 24, when in use, the airflow passes through the narrow opening at a relatively high speed, and the pressure chamber 22 is in a relatively high pressure state. The airflow passing through the speed-increasing narrow opening 23 enters the diffusion chamber 24, so that its flow rate is reduced, and the gas in the pressure chamber 22 can pass through the rotating drum 31, so that it cooperates with the through hole 32 to realize swirl air. At the same time, the speed-increasing narrow opening 23 reduces the pressure in the negative pressure chamber 27, realizes partial flue gas reflux and desulfurization reactant feed control proportional to the flow rate, and finally the flow rate is reduced in the diffusion chamber 24, so that the airflow and the desulfurization reactants are evenly mixed.

[0049] Specifically, Figure 2 As shown, a base 13 is fixedly connected to the lower surface of the venturi mixer 2 , and a plurality of columns 14 flush with the base 13 are provided on the side wall of the silo 8 .

[0050] The lower part of the venturi mixer 2 is firmly connected to a support base 13 to ensure that it maintains stability and firmness during use. When the venturi mixer 2 processes high-velocity flue gas, it is necessary to ensure that the structure does not vibrate or move. The base 13 is set to enhance the stability of its overall structure.

[0051] A plurality of support columns 14 having the same height as the base 13 are installed on the outer wall of the silo 8. The main function of the columns 14 is to provide additional support and structural strength for the entire device, further improving the stability of the device, especially when subjected to a certain material gravity and external force during operation, to ensure that the device does not tilt or deform. By designing the columns 14 flush with the base 13, the weight distribution of the entire device is more even, improving the durability and safety of the device.

[0052] Specifically, Figure 1 As shown: a flow control valve 10 is arranged between the reflux pipe 9 and the reflux port 12.

[0053] The flow control valve 10 is mainly used to adjust the flow of gas in the reflux pipe 9, so as to achieve precise control of the supply of desulfurization reactants. Specifically, the flow control valve 10 can adjust the flow of the reflux flue gas according to the actual working conditions and needs, ensuring that under different operating conditions, the system can automatically or manually adjust the reflux amount to match the supply of desulfurization reactants. The advantage of this control is precise regulation, so that the operator can accurately adjust the flow of the reflux gas according to the real-time monitoring data (such as flue gas flow, pressure, etc.), thereby improving the desulfurization efficiency. At the same time, by adjusting the reflux flow, the reaction conditions can be effectively optimized. When the flue gas flow is large, the reflux amount can be appropriately increased to ensure that enough reactants participate in the reaction, and vice versa. This flexibility enables the device to maintain the best operating state under different working conditions.

[0054] Specifically, Figure 4As shown: a rotating drum 31 is axially penetrated and rotated on one side of the negative pressure chamber 27, one end of the rotating drum 31 is fixedly connected to the reaction assembly 4, and a confluence bucket 34 is provided on the other end of the rotating drum 31;

[0055] The arc-shaped side wall of the rotating drum 31 is provided with a plurality of through holes 32 and a plurality of grinding grooves 33 . The rotating drum 31 and the inner wall of the confluence hopper 34 are rotatably matched via a rotating seat 35 .

[0056] The confluence hopper 34 can converge the airflow and pressurize the converged airflow to a certain extent and introduce it into the drum 31, so that the airflow formed in the drum 31 can be ejected through the through hole 32. In conjunction with the high-speed rotation of the drum 31, an airflow dispersed toward the surroundings is formed at the outlet position of the negative pressure chamber 27, so that the desulfurization reactants ejected from the negative pressure chamber 27 can be ejected while having lateral kinetic energy, thereby improving the dispersion.

[0057] By setting the grinding grooves 33, when the drum 31 rotates and a large flow of desulfurization reactants appears in the negative pressure chamber 27, blockage or poor circulation is very likely to occur. During the rotation of the drum 31, the grinding grooves 33 on the surface can continuously consume the blocked or retained desulfurization reactants, thereby preventing blockage and maintaining fluidity.

[0058] Specifically, Figure 3 As shown: the reaction assembly 4 includes a rotating shaft 41 fixedly connected to one end of the diffusion assembly 3, one end of the rotating shaft 41 is fixedly connected to an impeller 42, a support sleeve 43 is rotatably passed through the surface of the rotating shaft 41, a support seat 44 is fixedly connected to the surface of the support sleeve 43, and the support seat 44 is fixedly connected to the inner wall of the speed increasing narrow opening 23.

[0059] The impeller 42 can rotate through the action of airflow, so that it rotates with the drum 31 through the rotating shaft 41, wherein the rotating shaft 41 is supported and rotated by the support sleeve 43, and the support sleeve 43 is fixed by the support seat 44. The support seat 44 is designed to be flat and adopts a design to reduce wind resistance.

[0060] Specifically, Figure 4 As shown, the through hole 32 is located at the left opening of the negative pressure chamber 27 and is opened in an inclined shape, and the grinding groove 33 is arranged on the inner wall of the negative pressure chamber 27.

[0061] The through hole 32 is arranged in an inclined shape, which can keep the ejected airflow along the airflow, so that the desulfurization reactants are ejected at a certain angle, and there is a cut angle with the flow direction of the high-speed flue gas, so that they can diffuse while keeping along the flow direction of the airflow.

[0062] Specifically, Figure 2As shown: a connector 5 is provided on the opposite surface of the smoke outlet pipe 6 and the venturi mixer 2 . The connector 5 is fixedly connected to the bottom end of the smoke outlet pipe 6 , and the connector 5 is sealed and attached to one end of the venturi mixer 2 .

[0063] By providing the connector 5, the connector 5 can maintain the connection state between the smoke outlet pipe 6 and the venturi mixer 2, and can be easily disassembled when necessary, so as to facilitate operations such as inspection and maintenance.

[0064] Specifically, Figure 6 As shown, a plurality of fins 15 are fixedly connected to the surface of the confluence funnel 34 , and the fins 15 are jointly fixed to the inner wall of the pressure chamber 22 .

[0065] By providing the fins 15 , the fins 15 can support the confluence hopper 34 , maintain the stability of the confluence hopper 34 , and at the same time meet the demand for supporting the rotating drum 31 in a rotating state.

[0066] When this solution is in use, the smoke inlet pipe 1 is connected to the smoke filter device, and the smoke outlet pipe 6 is connected to the smoke purification device. The smoke enters the pressure chamber 22 of the venturi mixer 2 through the smoke inlet pipe 1, presents a high pressure in the pressure chamber 22, and then passes through the speed increase narrow opening 23 at a high flow rate to enter the diffusion chamber 24. When the airflow passes through the speed increase narrow opening 23 at a high speed, the pressure in the negative pressure chamber 27 is reduced, and the preset flow control valve 10 is connected to make the airflow of the smoke outlet pipe 6 enter the annular flow channel 28 through the return pipe 9 and the return port 12, and enter the negative pressure chamber 27 through the main flow channel 25 or the two auxiliary flow channels 26, wherein the refluxed smoke carries the desulfurization reactants in the replacement flow channel into the negative pressure chamber 27. Then it can be sprayed out, and the supply of desulfurization reactants (HAC) can be precisely controlled by controlling the amount of refluxed smoke by the flow control valve 10;

[0067] In this method, the raw materials are directly dropped by gravity through the silo 8 and the feed pipe 7 and accumulated at the bottom of the annular flow channel 28, and are mixed with part of the refluxed flue gas for a second time. The raw materials are then carried by the refluxed flue gas under the suction of the negative pressure and enter the negative pressure bin 27. In this process, a large amount of refluxed flue gas carries the desulfurization reactants into the negative pressure bin 27 through the main channel 25. If the flue gas volume is large, the flow rate of the speed increasing narrow opening 23 is further increased, so that the pressure in the negative pressure bin 27 is further reduced. At this time, the main channel 25 cannot meet the transportation of excess airflow and desulfurization reactants. The refluxed flue gas blows up the desulfurization reactants deposited at the bottom of the annular flow channel 28 at a higher flow rate, so that they are evenly distributed on the inner wall of the annular flow channel 28, and part of them pass through the auxiliary flow channel 26 to enter the negative pressure bin 27, so that both the main channel 25 and the auxiliary flow channel 26 can transport the desulfurization reactants, thereby ensuring the optimal feeding rate change under different operating powers.

[0068] At the same time, if the flue gas volume is larger, the pressure in the pressure chamber 22 is larger, and part of the flue gas can enter the inner wall of the drum 31 under the pressure of the diffusion chamber 24, and be discharged through the inclined through hole 32 at the other end of the drum 31. When the desulfurization reactants in the negative pressure chamber 27 are sprayed out, the desulfurization reactants can be dispersed under the oblique spraying action of the through hole 32, so that they can be mixed in the speed increasing narrow opening 23;

[0069] Furthermore, the airflow in the speed-increasing narrow opening 23 enters the diffusion chamber 24 at a high speed and rotates with the impeller 42. The impeller 42 rotates the drum 31 through the reaction of the rotating shaft 41, so that the through holes 32 on the surface of the drum 31 spray out airflow during rotation, and the desulfurization reactants are evenly sprayed out. At the same time, the high-speed airflow is cut by the impeller 42, and the airflow and the desulfurization reactants are further mixed, and the airflow is slowed down and evenly mixed in the diffusion chamber 24 before entering the smoke outlet pipe 6.

[0070] Compared with the prior art, the HAC calcium-based desulfurization Venturi injection device has made significant progress in desulfurization efficiency, airflow control and reactant delivery accuracy. First, the device realizes precise control of flue gas flow rate by setting the Venturi mixer 2. In particular, under the design of the speed-increasing narrow mouth 23, a low-pressure environment is formed in the negative pressure bin 27 by the action of the high-speed airflow, so as to realize the adaptive feeding of the desulfurization reactants. After the flue gas is pressurized, under the lateral rotation injection of the through hole 32, the desulfurization reactants are dispersed to the maximum extent in the speed-increasing narrow mouth 23, and the flow speed reduction effect of the diffusion bin 24 on the airflow is combined to improve the overall reaction efficiency and make the desulfurization reaction more sufficient. Secondly, the combination structure of the reaction component 4 and the impeller 42 drives the rotating drum 31 and the impeller 42 to rotate through the airflow, and the through hole 32 is combined to further realize the uniform dispersion of the desulfurization reactants, avoiding the uneven distribution of reactants in the traditional device, greatly increasing the contact area between the reactants and the flue gas, thereby improving the overall desulfurization effect.

[0071] In the usage scenario, the innovation of the device is mainly reflected in the dual control of the reflux flue gas and the desulfurization reactants. The device adjusts the amount of reflux flue gas through the flow control valve 10 to ensure the precise delivery of desulfurization reactants at different operating powers, adapt to different flue gas volume requirements, and achieve the best desulfurization reaction efficiency. In addition, the design of the annular flow channel 28, the main flow channel 25 and the auxiliary flow channel 26 in the device further optimizes the mixing process of flue gas and desulfurization reactants, which not only ensures effective reaction under large flue gas volume, but also cooperates with each other through high-speed airflow and negative pressure environment, so that the desulfurization reactants can fully react in each channel.

[0072] In summary, the device not only improves the desulfurization efficiency through precise airflow control, uniform dispersion and precise delivery of desulfurization reactants, but also can adapt to the desulfurization needs under different working conditions, and has significant innovation and practicality.

[0073] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A HAC calcium-based desulfurization Venturi injection device, characterized in that: It comprises a smoke inlet pipe (1), a smoke outlet pipe (6) is arranged on the other side of the smoke inlet pipe (1), and a Venturi mixer (2) is arranged at the opposite ends of the smoke inlet pipe (1) and the smoke outlet pipe (6); The inner wall of the Venturi mixer (2) is penetrated by a rotating diffusion component (3) for uniformly dispersing and transmitting desulfurization reactants, one end of the diffusion component (3) is fixedly connected to a reaction component (4) for driving the diffusion component (3) to rotate, and the reaction component (4) is arranged on the inner wall of the Venturi mixer (2); A feed port (11) and a reflux port (12) are symmetrically arranged on both sides of the venturi mixer (2); the feed port (11) is connected to a feed pipe (7); a silo (8) for feeding the venturi mixer (2) is arranged above the venturi mixer (2); and a discharge port of the silo (8) is connected to the top of the feed pipe (7); A return pipe (9) is provided on the surface of the return port (12), and the return pipe (9) is in communication with the side wall of the smoke outlet pipe (6).

2. A HAC calcium-based desulfurization Venturi injection device according to claim 1, characterized in that: The venturi mixer (2) comprises a base (21), a pressure chamber (22) is provided at the right end of the base (21), a diffusion chamber (24) is provided at the left end of the base (21), a speed increasing narrow opening (23) which is interconnected is provided at a side of the diffusion chamber (24) opposite to the pressure chamber (22), and the ends of the diffusion chamber (24) opposite to the pressure chamber (22) are both arranged in a bucket shape.

3. A HAC calcium-based desulfurization Venturi injection device according to claim 1, characterized in that: The lower surface of the Venturi mixer (2) is fixedly connected to a base (13), and the side wall of the silo (8) is provided with a plurality of columns (14) flush with the base (13).

4. A HAC calcium-based desulfurization Venturi injection device according to claim 2, characterized in that: An annular flow channel (28) is arranged on the surface of the base (21), a negative pressure chamber (27) is axially arranged on the right side of the speed increasing narrow opening (23), the right inner wall of the negative pressure chamber (27) is connected with a main flow channel (25) and two auxiliary flow channels (26), the main flow channel (25) and the two auxiliary flow channels (26) are both connected and arranged on the inner wall of the annular flow channel (28), and the main flow channel (25) and the two auxiliary flow channels (26) are both arranged in an inclined shape.

5. A HAC calcium-based desulfurization Venturi injection device according to claim 3, characterized in that: A flow control valve (10) is provided between the reflux pipe (9) and the reflux port (12).

6. A HAC calcium-based desulfurization Venturi injection device according to claim 4, characterized in that: A rotating drum (31) is axially penetrated and rotated on one side of the negative pressure chamber (27), one end of the rotating drum (31) is fixedly connected to the reaction assembly (4), and a confluence bucket (34) is provided on the other end of the rotating drum (31); The arc-shaped side wall of the rotating drum (31) is provided with a plurality of through holes (32) and a plurality of grinding grooves (33). The rotating drum (31) and the inner wall of the confluence bucket (34) are rotatably matched via a rotating seat (35).

7. A HAC calcium-based desulfurization Venturi injection device according to claim 1, characterized in that: The reaction assembly (4) comprises a rotating shaft (41) fixedly connected to one end of the diffusion assembly (3); one end of the rotating shaft (41) is fixedly connected to an impeller (42); a support sleeve (43) is rotatably passed through the surface of the rotating shaft (41); a support seat (44) is fixedly connected to the surface of the support sleeve (43); and the support seat (44) is fixedly connected to the inner wall of the speed increasing narrow opening (23).

8. A HAC calcium-based desulfurization Venturi injection device according to claim 6, characterized in that: The through hole (32) is located at the left opening of the negative pressure chamber (27) and is opened in an inclined shape, and the grinding groove (33) is arranged on the inner wall of the negative pressure chamber (27).

9. A HAC calcium-based desulfurization Venturi injection device according to claim 1, characterized in that: The smoke outlet pipe (6) and the opposite surface of the venturi mixer (2) are provided with a connector (5), the connector (5) is fixedly connected to the bottom end of the smoke outlet pipe (6), and the connector (5) is sealed and attached to one end of the venturi mixer (2).

10. A HAC calcium-based desulfurization Venturi injection device according to claim 8, characterized in that: A plurality of fins (15) are fixedly connected to the surface of the confluence hopper (34), and the fins (15) are jointly fixed to the inner wall of the pressure chamber (22).

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