Flue gas adsorption reactor

Abstract

The utility model provides a flue gas adsorption reactor, and particularly relates to the technical field of flue gas adsorption reactors. Which comprises an air inlet section, a venturi reactor and a turbulent flow reactor which are sequentially communicated, and is characterized in that the venturi reactor is formed by sequentially connecting a shrinkage pipe, a throat pipe and a diffusion pipe, the diameter of the throat pipe is smaller than 1 / 3 of the diameter of an inlet of the shrinkage pipe, and the length of the diffusion pipe is larger than 1.5 times of the length of the shrinkage pipe; the near-gas section is arranged below the shrinkage pipe, a feeding chute with an inclination angle of 10-20 degrees is formed in the side wall of the near-gas section, and an outlet of the feeding chute extends to an inlet of a throat pipe of the Venturi reactor. According to the utility model, through the design that the diameter of the throat pipe in the Venturi reactor is smaller than 1 / 3 of the inlet of the shrinkage pipe and the length of the diffusion pipe is increased by 1.5 times of that of the shrinkage pipe, the collision contact probability of flue gas and an adsorbent is obviously improved through a high-speed jet effect, the adsorption utilization efficiency is greatly improved, the gas-solid reaction time is prolonged, and the adsorption reaction is more sufficient.

Description

Technical Field

[0001] This utility model relates to the field of flue gas adsorption reactor technology, and specifically to a flue gas adsorption reactor. Background Technology

[0002] With increasingly stringent environmental protection requirements, industrial flue gas treatment technologies are constantly being upgraded. As the core equipment of the contact reaction system, the structural optimization of the adsorption reactor is of great significance for improving pollutant removal efficiency and reducing operating costs. Traditional flue gas adsorption devices mostly adopt a single Venturi structure or static mixer, which suffers from problems such as uneven adsorbent dispersion, insufficient gas-solid contact time, and excessive local pressure drop. Moreover, in the carbon production industry, the flue gas produced during the high-temperature roasting process contains a large amount of sticky pollutants such as pitch tar and polycyclic aromatic hydrocarbons.

[0003] For example, the throat diameter and diffusion section length of a conventional Venturi reactor are not designed properly, which makes it impossible to form sufficient turbulence after the high-speed flue gas mixes with the adsorbent. Short-circuit flow is easily formed in some areas, which significantly reduces the adsorption efficiency. At the same time, the fixed turbulence components are prone to ash accumulation and blockage. The surface of the fixed turbulence components is prone to the adhesion of asphalt tar to form a hard scale layer. Moreover, the shutdown and descaling operation requires the entire reactor to be disassembled, which seriously affects the continuity of production.

[0004] In existing technologies, although the flue gas is accelerated through a contraction tube, the ratio of the throat diameter to the contraction tube is too large, failing to create a sufficient negative pressure ejection effect, thus limiting the amount of adsorbent to be added. The excessively large cone angle and insufficient length of the diffuser section cause the airflow to decelerate prematurely in the diffuser section, resulting in low kinetic energy recovery efficiency and increased equipment energy consumption. When the concentration of particulate matter in the flue gas fluctuates, local channel blockage can easily lead to process distortion. Furthermore, the feed inlets are often arranged vertically or horizontally, causing adsorbent to accumulate at the inlet, resulting in uneven feeding and material overflow.

[0005] To address the aforementioned shortcomings, there is an urgent need for a flue gas adsorption reactor that is compact, has high gas-solid mixing efficiency, and is easy to maintain, so as to reduce operating resistance while ensuring adsorption effect, and to achieve precise adsorbent dosing and rapid maintenance and replacement of turbulence components. Utility Model Content

[0006] The purpose of this invention is to provide a flue gas adsorption reactor to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a flue gas adsorption reactor, comprising an inlet section, a Venturi reactor, and a turbulent reactor connected in sequence, characterized in that: the Venturi reactor is composed of a contraction tube, a throat tube, and a diffuser tube connected in sequence, wherein the diameter of the throat tube is less than 1 / 3 of the inlet diameter of the contraction tube, and the length of the diffuser tube is greater than 1.5 times the length of the contraction tube;

[0008] The turbulence reactor is positioned above the diffuser and contains a removable turbulence assembly.

[0009] The near-gas section is located below the contraction tube, and the side wall is provided with a feed chute with an inclination angle of 10°-20°. The outlet of the feed chute extends to the throat inlet of the Venturi reactor.

[0010] Preferably, the diffuser cone angle of the Venturi reactor is smaller than that of the constriction cone angle, and the inner wall of the diffuser is provided with an annular guide groove to facilitate the rapid flow of flue gas.

[0011] Preferably, the turbulence assembly includes a support body, a central shaft and turbulence blades, and a support ring plate. The length of the support body is longer than the diameter of the turbulence reactor, and its two ends can be fixed to the wall plate of the turbulence reactor by detachable clamps. The support body is fixed to the support ring plate, and the central shaft is vertically welded to the middle of the support body and extends into the interior of the turbulence reactor.

[0012] Preferably, the turbulence blades are arranged in a spiral array and welded to the central shaft, and the surface of the turbulence blades is uniformly provided with multiple guide holes of the same size.

[0013] Preferably, the turbulence blades are installed in the same direction as the flue gas flow to reduce resistance.

[0014] Preferably, the feed chute is inclined upward at 15°, with one end welded into the reserved hole at the air inlet and the other end connected to the feed pump.

[0015] Preferably, the top of the feed chute is equipped with a cover plate to reduce material spillage.

[0016] Preferably, a vibration motor is installed at the bottom of the feed chute to prevent clogging of the chute.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model, through the design of a venturi reactor with a throat diameter smaller than 1 / 3 of the inlet diameter of the contraction tube and a diffuser length increased to 1.5 times that of the contraction tube, significantly increases the collision and contact probability between flue gas and adsorbent through the high-speed jet effect, greatly improves the adsorption utilization efficiency, and extends the gas-solid reaction time, making the adsorption reaction more complete.

[0019] 2. The innovative structure of reducing the cone angle of the diffuser tube and setting an annular guide groove effectively reduces airflow resistance loss and avoids the problem of dust accumulation on the tube wall. The secondary circulation formed by the guide groove can accelerate the diffusion of the adsorbent.

[0020] 3. The turbulence assembly features an extra-long support body with detachable clamps for fixation, enabling modular assembly. Maintenance allows for quick, single-person replacement of components, significantly improving maintenance efficiency compared to traditional welded structures. The vertical welding process of the central shaft ensures the operational stability of the turbulence blades, greatly extending their service life.

[0021] 4. The spiral array of turbulent blades, combined with the surface guide holes, prevents oil accumulation. Furthermore, the turbulent blades are aligned with the flue gas direction, which effectively reduces resistance and improves flue gas purification efficiency.

[0022] 5. The overall structure adopts a segmented modular design, and each component is equipped with a standardized connection interface, which can be flexibly combined and expanded according to processing needs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the Venturi reactor structure of this utility model.

[0025] Figure 3 This is a schematic diagram of the turbulence component structure of this utility model.

[0026] The components in the attached diagram are labeled as follows: 1: Inlet section; 2: Venturi reactor; 21: Contraction tube; 22: Throat; 23: Diffusion tube; 231: Annular guide channel; 3: Turbulent reactor; 4: Turbulent component; 41: Support body; 42: Central shaft; 43: Turbulent blades; 431: Guide channel hole; 44: Support ring plate; 5: Feed chute; 6: Cover plate; 7: Vibration motor. Detailed Implementation

[0027] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0028] This utility model is as follows Figure 1-3The flue gas adsorption reactor shown includes an inlet section 1, a Venturi reactor 2, and a turbulent reactor 3 connected in sequence. The Venturi reactor 2 is composed of a contraction tube 21, a throat 22, and a diffuser 23 connected in sequence. The diameter of the throat 22 is designed to be 1 / 3 of the inlet diameter of the contraction tube 21 (for example, the inlet diameter of the contraction tube is 300 mm, and the diameter of the throat is 100 mm). The length of the diffuser 23 is greater than 1.5 times the length of the contraction tube 21 (for example, the length of the contraction tube is 1 m, and the length of the diffuser is 1.5 m). The turbulent reactor 3 is vertically welded to the outlet end of the diffuser 23, and a detachable turbulent component 4 is installed inside it. The inlet section 1 is a cylindrical structure, welded below the contraction tube 21, and its side wall is provided with a feed chute 5 with an inclination angle of 10°-20°. The outlet of the feed chute 5 extends to the center position of the inlet of the throat 22 of the Venturi reactor 2.

[0029] The flue gas enters from the bottom of the inlet section 1, is accelerated by the contraction tube 21, and forms a high-speed jet at the throat tube 22. The adsorbent is drawn into the throat tube 22 by the feed chute 5 under negative pressure and is fully mixed with the high-speed flue gas. The diffuser tube 23 reduces the flow rate and prolongs the gas-solid contact time through the gradual expansion structure. The turbulent reactor 3 further enhances the adsorption and reaction with the flue gas through the turbulent component 4.

[0030] The cone angle of the diffuser tube 23 of the Venturi reactor 2 is smaller than that of the cone angle of the constriction tube 21. The small cone angle of the diffuser tube 23 reduces airflow separation and forms a secondary swirling flow with the guide groove 231, so that the flue gas maintains an alternating state of laminar and turbulent flow in the diffuser tube 23. The inner wall of the diffuser tube 23 is provided with an annular guide groove 231 to facilitate the rapid flow of flue gas.

[0031] The turbulence assembly 4 includes a support body 41, a central shaft 42, turbulence blades 43, and a support ring plate 44. The length of the support body 41 is longer than the diameter of the turbulence reactor 3. Both ends of the support body 41 can be fixed to the wall of the turbulence reactor 3 by disassembling clamps. The clamp fixing method can achieve quick assembly and disassembly. The support ring plate 44 is an annular stainless steel plate set on the inner wall above the turbulence reactor 3. The central shaft 42 is vertically welded to the middle of the support body 41 and extends into the interior of the turbulence reactor 3.

[0032] Turbulent blades 43 are arranged in a spiral array and welded to the central shaft 42. Their spiral arrangement easily forms a swirling airflow. In conjunction with the multiple guide holes 431 of the same size uniformly opened on the surface of the turbulent blades 43, local turbulence is generated to prevent the accumulation of asphalt tar. Moreover, the installation direction of the turbulent blades 43 is the same as the flue gas flow direction, which reduces resistance and greatly increases the contact area between the flue gas and the adsorption, thereby improving the pollutant adsorption efficiency.

[0033] The feed chute 5 has a 15° inclination angle. One end is welded into the reserved hole of the air inlet section 1, and the other end is connected to the feed pump. The inclination angle ensures that the adsorbent slides naturally into the throat 22 under the action of gravity. A vibration motor is installed below the feed chute to prevent material accumulation. It works in conjunction with the Venturi negative pressure to achieve dual-power feeding. The cover plate 6 is made of transparent PVC material and is connected to the top of the feed chute 5 by hinges. The edge of the plate is equipped with a silicone sealing strip, and a viewing window is opened in the middle to observe the internal flow.

[0034] Working principle: First, when the flue gas enters from the bottom of the inlet section 1, the 15° inclined feed chute 5 set on the side wall, under the anti-clogging protection of the vibrating motor 7, sprays the adsorbent tangentially to the throat inlet of the Venturi reactor 2. Since the diameter of the throat 22 is only 1 / 3 of the inlet of the contraction tube 21, when the flue gas accelerates through the contraction tube 21, a negative pressure zone is formed in the throat, which automatically draws the adsorbent into the main airflow, realizing the initial gas-solid mixing.

[0035] After the mixed airflow enters the diffuser 23, its length is designed to be more than 1.5 times that of the contraction tube 21 and its cone angle is smaller, forming a gradually expanding flow channel. The annular guide groove 231 on the inner wall guides the flue gas to rise in a spiral trajectory, causing the flue gas velocity to decrease. The initial adsorption reaction is completed through inertial collision and diffusion effect.

[0036] After the diffused airflow enters the turbulent reactor 3, it encounters the turbulent blades 43 arranged in a spiral array. The guide holes 431 on the surface of the blades divide the main airflow into multiple micro vortices, causing the adsorbent to be mixed in turbulent directions. The specially designed blade installation angle is consistent with the flue gas flow direction, which enhances the adsorption effect. The detachable turbulent component 4 can be quickly disassembled and assembled through the support ring plate 44, which is convenient for maintenance and cleaning.

[0037] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A flue gas adsorption reactor, comprising an inlet section (1), a Venturi reactor (2), and a turbulent reactor (3) connected in sequence, characterized in that: The Venturi reactor (2) is composed of a contraction tube (21), a throat tube (22), and a diffuser tube (23) connected in sequence. The diameter of the throat tube (22) is less than 1 / 3 of the inlet diameter of the contraction tube (21), and the length of the diffuser tube (23) is greater than 1.5 times the length of the contraction tube (21). The turbulent reactor (3) is positioned above the diffuser (23) and has a removable turbulent component (4) installed inside. The air inlet section (1) is located below the contraction tube (21), and the side wall is provided with a feed chute (5) with an inclination angle of 10°-20°. The outlet of the feed chute (5) extends to the inlet of the throat (22) of the Venturi reactor (2).

2. The flue gas adsorption reactor as described in claim 1, characterized in that: The cone angle of the diffuser tube (23) of the Venturi reactor (2) is smaller than that of the cone angle of the constriction tube (21), and the inner wall of the diffuser tube (23) is provided with an annular guide groove (231) to facilitate the rapid flow of flue gas.

3. The flue gas adsorption reactor as described in claim 1, characterized in that: The turbulence assembly (4) includes a support body (41), a central shaft (42), turbulence blades (43), and a support ring plate (44). The length of the support body (41) is longer than the diameter of the turbulence reactor (3). Both ends of the support body (41) can be fixed to the wall of the turbulence reactor (3) by removing clamps. The support body (41) is fixed on the support ring plate (44). The central shaft (42) is vertically welded to the middle of the support body (41) and extends into the interior of the turbulence reactor (3).

4. The flue gas adsorption reactor as described in claim 3, characterized in that: The turbulent blades (43) are arranged in a spiral array and welded to the central shaft (42), and the surface of the turbulent blades (43) is uniformly provided with multiple guide holes (431) of the same size.

5. The flue gas adsorption reactor as described in claim 3, characterized in that: The turbulence blade (43) is installed in the same direction as the flue gas flow to reduce resistance.

6. The flue gas adsorption reactor as described in claim 1, characterized in that: The feed chute (5) is inclined upward at 15°, with one end welded into the reserved hole of the air inlet section (1) and the other end connected to the feed pump.

7. The flue gas adsorption reactor as described in claim 1, characterized in that: The top of the feed chute (5) is provided with a cover plate (6) to reduce material spillage.

8. The flue gas adsorption reactor as described in claim 1, characterized in that: A vibration motor (7) is installed at the bottom of the feed chute (5) to prevent chute blockage.

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