High-temperature waste gas treatment device for high-temperature sterilization kettle

Abstract

The invention discloses a high-temperature waste gas treatment device for a high-temperature sterilization kettle, and relates to the technical field of high-temperature waste gas recovery, the high-temperature waste gas treatment device comprises a cooling pipe, the two sides of the cooling pipe are open ends, one end of the cooling pipe is used for being connected with an exhaust port of the sterilization kettle, and the cooling pipe is of a Venturi structure and sequentially comprises a contraction section, a throat part and a diffusion section in the airflow direction; the premixing cooling assembly is arranged at the contraction section and comprises a connecting pipe, the bottom of the connecting pipe communicates with the contraction section, the end, away from the contraction section, of the connecting pipe fixedly communicates with an air inducing pipe, an air inlet is formed in the air inducing pipe, and a partition plate is slidably connected to the position, located at the air inlet, of the air inducing pipe; a wax type thermal expansion actuator is arranged at the contraction section, the internal output end of the wax type thermal expansion actuator is fixedly connected with the partition plate, and the temperature sensing end of the wax type thermal expansion actuator is arranged at the position, close to the throat, of the contraction section; the flow stabilizing assembly is arranged at the outlet of the diffusion section; and the demisting assembly is arranged at the air outlet of the flow stabilizing assembly.

Description

Technical Field

[0001] This invention relates to the field of high-temperature waste gas recovery technology, specifically a high-temperature waste gas treatment device for a high-temperature sterilization autoclave. Background Technology

[0002] High-temperature sterilization autoclaves are widely used in the food, beverage, condiment, and pharmaceutical industries. The process typically involves stages such as heating, constant-temperature sterilization, and pressure release / vapor exhaust. During these processes, high-temperature, high-humidity waste gas is continuously or intermittently generated. The gas is primarily composed of water vapor, often carrying small amounts of volatile organic compounds (VOCs, such as alcohols, aldehydes, ketones, and lipid decomposition products), oil mist, and condensable aerosols, and may also contain trace amounts of acidic gases (such as organic acid vapors). This type of waste gas is characterized by high temperature, high humidity, strong fluctuations, and the presence of condensable substances.

[0003] To remove odors and VOCs, activated carbon adsorption is commonly used in engineering due to its simple setup, rapid start-up, and broad-spectrum adsorption capacity for various organic compounds. Activated carbon adsorption is generally most effective under conditions of lower gas temperature and moderate humidity, and purification is achieved through fixed beds or honeycomb carbon beds.

[0004] High temperatures significantly reduce the equilibrium adsorption capacity for most VOCs and easily trigger localized "hot spots" of exothermic adsorption. When oxygen is abundant or the organic load is high, hot spots may further develop into smoldering or oxidation, causing carbon layer pulverization, ablation, and failure, shortening service life and posing safety hazards. Water molecules in high-humidity airflow compete with polar sites for adsorption, significantly inhibiting the adsorption of organic matter. When the airflow temperature or dew point is not properly controlled, condensate forms free water in the bed, causing the pores to be occupied by liquid, resulting in problems such as a sudden drop in capacity, an increase in pressure drop, and difficulty in regeneration.

[0005] Therefore, we propose a high-temperature waste gas treatment device for high-temperature sterilization autoclaves. Summary of the Invention

[0006] The purpose of this invention is to provide a high-temperature waste gas treatment device for a high-temperature sterilization autoclave, thereby solving the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a high-temperature waste gas treatment device for a high-temperature sterilization autoclave, comprising:

[0007] The cooling tube has open ends on both sides. One end of the cooling tube is used to connect to the exhaust port of the sterilization vessel. The cooling tube has a Venturi structure and includes a constriction section, a throat and a diffuser section in sequence along the airflow direction.

[0008] A premixed cooling component, wherein the premixed cooling component is disposed at the contraction section, the premixed cooling component comprising:

[0009] A connecting pipe is provided, the bottom of which is connected to the contraction section. An air inlet is fixedly connected to the end of the connecting pipe away from the contraction section. An air inlet is provided on the air inlet. A partition is slidably connected to the air inlet of the air inlet. A wax-type thermal expansion actuator is provided at the contraction section. The internal output end of the wax-type thermal expansion actuator is fixedly connected to the partition. The temperature sensing end of the wax-type thermal expansion actuator is located near the throat of the contraction section.

[0010] A current stabilizing component is disposed at the outlet of the diffuser section;

[0011] A demisting component is disposed at the air outlet of the flow stabilizing component.

[0012] Preferably, the air inlet on the induced air duct is a downward-convex conical opening.

[0013] Preferably, the current stabilizing component includes:

[0014] The tube body contains a honeycomb rectifier.

[0015] Preferably, the defogging component includes:

[0016] case;

[0017] The flow deflector is composed of multiple pairs of deflector plates, each pair including a first deflector plate and a second deflector plate, and several pairs of first deflector plates and second deflector plates are arranged in an array.

[0018] A drive assembly is disposed on the housing and is used to adjust the angle of the baffle. An air volume indicator unit is disposed on the pipe body and is used in conjunction with the drive assembly.

[0019] Preferably, the driving component includes:

[0020] The movable component comprises multiple pairs of movable plates, each pair including movable plate one and movable plate two. Several pairs of movable plate one and movable plate two are arranged in an array. Both ends of the deflector plate one are fixedly connected to connecting rods. One end of the connecting rod of the deflector plate one is slidably connected to movable plate one, and the other end is rotatably connected to movable plate two. The two ends of movable plate one and movable plate two are connected by cross rods. When movable plate one is pushed on one side, movable plate one and movable plate two move closer or separate synchronously as a whole.

[0021] An electric cylinder is fixedly connected to the top of the housing, and the end of the output shaft inside the electric cylinder is fixedly connected to the top of the outermost movable plate.

[0022] This invention has at least the following beneficial effects:

[0023] 1. Based on temperature sensing in the throat region, the wax-type thermal expansion actuator directly drives the baffle to adjust the induced air volume, forming a temperature adaptive closed loop that does not require an external power supply; it can quickly reduce the mixing temperature under hot shock conditions and maintain stability under normal small disturbances, reducing the risk of overcooling and condensation.

[0024] 2. The Venturi structure, together with the downward-converging conical air inlet, utilizes the low pressure at the throat to achieve efficient airflow and improve mixing uniformity; the sliding fit between the air inlet and the baffle makes the opening area respond non-linearly to the stroke, which is more in line with the cold source replenishment needs under different operating conditions.

[0025] 3. The flow stabilization component at the outlet of the diffuser section adopts a honeycomb rectifier built into the tube, which can uniformly distribute the velocity field and suppress transverse eddy currents, providing a stable inflow to the demisting section, thereby reducing the probability of re-entrainment and smoothing the system pressure drop.

[0026] 4. In the demisting assembly, the paired baffles work in conjunction with the moving parts of the drive assembly and the crossbar linkage mechanism to achieve synchronous adjustment of the included angle with the help of the air volume indicator unit: when the air volume increases, the included angle is appropriately increased to control the pressure drop and suppress the captured droplets from being carried away; when the air volume decreases, the included angle is appropriately decreased to enhance the inertial capture and coalescence efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the premixed cooling component structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the air induction duct structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the current stabilization component structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the drive component structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the baffle structure of the present invention.

[0033] In the diagram: 10. Cooling pipe; 101. Contraction section; 102. Throat; 103. Diffusion section; 20. Premixed cooling component; 21. Connecting pipe; 22. Induced air duct; 23. Baffle plate; 24. Wax-type thermal expansion actuator; 40. Flow stabilizing component; 41. Pipe body; 42. Honeycomb rectifier; 30. Demisting component; 33. Shell; 31. Baffle plate; 311. Baffle plate one; 312. Baffle plate two; 32. Drive component; 34. Air volume indicator unit; 321. Moving part; 322. Moving plate one; 323. Moving plate two; 324. Connecting rod; 325. Electric cylinder. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-6 This invention provides a technical solution: a high-temperature waste gas treatment device for a high-temperature sterilization autoclave, comprising:

[0036] Cooling tube 10, with open ends on both sides, one end of cooling tube 10 is used to connect to the exhaust port of sterilization vessel, cooling tube 10 has a venturi structure, and includes a contraction section 101, a throat 102 and a diffuser section 103 in sequence along the airflow direction;

[0037] Premixed cooling component 20, wherein the premixed cooling component 20 is disposed at the contraction section 101, the premixed cooling component 20 includes:

[0038] A connecting pipe 21 is connected at its bottom to the contraction section 101. An air inlet pipe 22 is fixedly connected to the end of the connecting pipe 21 away from the contraction section 101. An air inlet pipe 22 is provided on the air inlet pipe 22. A partition plate 23 is slidably connected to the air inlet pipe 22. A wax-type thermal expansion actuator 24 is provided at the contraction section 101. The internal output end of the wax-type thermal expansion actuator 24 is fixedly connected to the partition plate 23. The temperature sensing end of the wax-type thermal expansion actuator 24 is located at the throat 102 of the contraction section 101.

[0039] A flow stabilizing component 40 is disposed at the outlet of the diffuser section 103;

[0040] Demisting component 30, wherein the demisting component 30 is disposed at the air outlet of the flow stabilizing component 40;

[0041] It should be noted that the high-temperature and high-humidity exhaust gas from the self-incineration reactor enters the contraction section 101 of the cooling pipe 10 at the exhaust port. Within the contraction section 101, the gas is rectified and accelerated, forming a high-speed zone with lower static pressure at the throat 102. This low-pressure zone is attracted by the induction air pipe 22 on the connecting pipe 21, which communicates with the wall of the contraction section 101. This causes ambient cold air to be drawn in through the induction air port, where it undergoes strong shear premixing and cooling with the high-temperature exhaust gas from the reactor end near the throat 102 in the contraction section 101.

[0042] A baffle 23 at the induced air inlet is mechanically connected to a wax-type thermal expansion actuator 24. The temperature-sensing end of the thermal expansion actuator 24 is located near the throat 102 of the contraction section 101, and obtains the temperature signal through convective heat exchange with the mixed gas at that location via a metal heat-conducting component. When the temperature rises, the wax core expands, pushing the baffle 23 to increase the opening of the induced air inlet, induced more cold source air, and the temperature of the mixed gas is lowered. When the temperature drops, the wax core retracts, causing the baffle 23 to decrease its opening, reducing the induced air volume to avoid overcooling and condensation. This forms a closed loop that is electrically free and temperature-sensitive, stabilizing the temperature of the mixed gas within the target range.

[0043] After premixing, the gas enters the diffuser section 103 through the throat 102. During the small-angle diffusion process, the velocity decreases, the static pressure increases, and the turbulence decreases. At the outlet of the diffuser section 103, the flow stabilization component 40 further homogenizes the velocity field and weakens the transverse vortices, thereby creating stable inflow conditions for downstream separation. Subsequently, the gas enters the demister component 30 located downstream, where entrained droplets are removed through mechanical means such as deflection, inertial collision, and coalescence, resulting in a relatively dry, temperature-controlled gas output for subsequent processing.

[0044] It is worth noting that, based on the temperature sensing of the posterior throat region, the wax-type thermal expansion actuator 24 directly drives the baffle 23 to adjust the induced air volume, forming a temperature adaptive closed loop that does not require an external power supply; under hot shock conditions, the mixing temperature can quickly drop, and under normal small disturbances, it remains stable, reducing the risk of overcooling and condensation.

[0045] The Venturi structure, in conjunction with the downward-converging conical air inlet, utilizes the low pressure at the throat 102 to achieve efficient airflow and improve mixing uniformity; the sliding fit between the air inlet and the baffle 23 makes the opening area respond non-linearly to the stroke, which better meets the cold source replenishment needs under different operating conditions.

[0046] The flow stabilization component 40 at the outlet of the diffuser section 103 adopts a honeycomb rectifier 42 built into the tube body 41, which can uniformly measure the velocity field and suppress transverse eddy currents, providing a stable inflow to the demisting section, thereby reducing the probability of re-entrainment and smoothing the system pressure drop.

[0047] In the demisting assembly 30, the paired baffles 311 and 312 work together with the moving part 321 of the drive assembly 32 and the crossbar linkage mechanism to achieve synchronous adjustment of the included angle with the help of the air volume indicator unit 34: when the air volume increases, the included angle is appropriately increased to control the pressure drop and suppress the captured droplets from being carried away; when the air volume decreases, the included angle is appropriately decreased to enhance the inertial capture and coalescence efficiency.

[0048] Further, as shown in Figure 3, it is worth noting that the air inlet on the induced draft pipe 22 is a downward-convex conical opening;

[0049] It should be noted that the downward-convex conical air inlet is used to form a stable induced air jet under the low pressure of the throat 102, and establishes a nonlinear "opening area and stroke" relationship with the sliding of the baffle 23; the opening changes slowly in the short stroke stage, which is conducive to the fine adjustment of temperature under normal conditions, and the rapid replenishment of cold source air to reduce the mixing temperature under hot shock conditions.

[0050] Further, as shown in Figure 4, it is worth noting that the current stabilizing component 40 includes:

[0051] Pipe body 41, wherein a honeycomb rectifier 42 is provided inside the pipe body 41;

[0052] It should be noted that the flow stabilization component 40 consists only of the pipe body 41 and its built-in honeycomb rectifier 42; the honeycomb rectifier 42 is used to rectify and stabilize the airflow passing through the pipe body 41, so that the airflow entering the downstream tends to be uniform and stable.

[0053] Further, as shown in Figure 5 and Figure 6 As shown, it is worth noting that the defogging component 30 includes:

[0054] Casing 33;

[0055] The flow deflector 31 is composed of multiple pairs of flow deflectors, each pair including a first flow deflector 311 and a second flow deflector 312, and several pairs of the first flow deflector 311 and the second flow deflector 312 are arranged in an array.

[0056] A drive assembly 32 is disposed on the housing 33. The drive assembly 32 is used to adjust the included angle of the baffle 31. An air volume indicator unit 34 is disposed on the pipe body 41. The air volume indicator unit 34 is used in conjunction with the drive assembly 32.

[0057] It should be noted that the gas, after being rectified by the flow stabilizing component 40, enters the housing 33 of the demisting component 30 and passes sequentially through the baffle 31, which consists of multiple sets of paired baffle plates 311 and 312, along the airflow direction. In each set, the baffle plates 311 and 312 form a deflection channel, where the gas undergoes a change in direction and a rearrangement of velocity distribution. The entrained mist droplets deviate from the streamline due to inertia and collide with the surface of the baffle plates, coalescing into larger droplets. Subsequently, the droplets are moved away from the main airflow area along the plate surface by gravity and shear force, thereby achieving mechanical demisting.

[0058] An airflow indicator unit 34 mounted on the pipe body 41 reflects changes in the current airflow. A drive assembly 32, installed on the housing 33 and linked to each set of baffles, synchronously adjusts the angle between adjacent baffles based on the changes reflected by the airflow indicator unit 34: when the airflow increases, the angle is appropriately increased to increase the equivalent cross-sectional area of ​​the channel, control local shear and pressure drop, and reduce the risk of captured droplets being carried away; when the airflow decreases, the angle is appropriately decreased to narrow the channel and enhance the deflection effect, thereby improving inertial collision and coalescence efficiency. Through this synchronous adjustment based on airflow, the baffle 31 achieves a dynamic balance between demisting efficiency and gas path pressure drop under different operating conditions, ensuring that the gas entering the downstream unit is more uniform and has lower mist content.

[0059] Further, as shown in Figure 1, Figure 5 and Figure 6 As shown, it is worth noting that the driving component 32 includes:

[0060] The movable component 321 is composed of multiple pairs of movable plates, each pair including a first movable plate 322 and a second movable plate 323. Several pairs of first movable plates 322 and second movable plates 323 are arranged in an array. Both ends of the first baffle plate 311 are fixedly connected to connecting rods 324. One end of the connecting rod 324 of the first baffle plate 311 is slidably connected to the first movable plate 322, and the other end is rotatably connected to the second movable plate 323. The two ends of the first movable plate 322 and the second movable plate 323 are connected by cross rods. When the cross rods push one side of the first movable plate 322, the first movable plate 322 and the second movable plate 323 move closer or separate synchronously.

[0061] Electric cylinder 325 is fixedly connected to the top of housing 33, and the end of the output shaft inside electric cylinder 325 is fixedly connected to the top of the outermost movable plate 323.

[0062] It should be noted that the drive assembly 32 consists of a moving part 321 and an electric cylinder 325. The electric cylinder 325 is fixedly connected to the top of the housing 33, and its output shaft is fixedly connected to the outermost moving plate 323 of the array. During operation, it provides linear displacement along the array direction of the deflector 31. This displacement is transmitted at both ends via crossbars, causing each set of moving plates 322 and 323 to move synchronously in opposite or opposite directions along the array direction with equal strokes. Each baffle plate 311 has a connecting rod 324 at both ends. One end of the connecting rod 324 is slidably connected to the corresponding movable plate 322, and the other end is rotatably connected to the corresponding movable plate 323. When the movable plate 322 and the movable plate 323 move towards each other, the connecting rod 324, through the sliding and rotating cooperation, drives the corresponding baffle plate 311 to rotate relative to the paired baffle plate 312, causing the included angle between adjacent baffle plates to decrease synchronously. When the movable plate 322 and the movable plate 323 move away from each other, the included angle increases synchronously. Through the transmission of the electric cylinder 325, the movable component 321, the cross rod, and the connecting rod 324, the linkage adjustment of the included angle of each set of baffle plates in the baffle component 31 is realized.

[0063] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0064] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A high-temperature waste gas treatment device for a high-temperature sterilization autoclave, characterized in that, include: Cooling tube (10), both sides of the cooling tube (10) are open ends, one end of the cooling tube (10) is used to connect to the exhaust port of the sterilization vessel, the cooling tube (10) is a Venturi structure, and includes a contraction section (101), a throat (102) and a diffusion section (103) in sequence along the airflow direction. A premixed cooling component (20) is disposed at the contraction section (101), and the premixed cooling component (20) includes: A connecting pipe (21) is connected to the bottom of the contraction section (101). The end of the connecting pipe (21) away from the contraction section (101) is fixedly connected to an air inlet pipe (22). An air inlet is provided on the air inlet pipe (22). A partition plate (23) is slidably connected to the air inlet pipe (22). A wax-type thermal expansion actuator (24) is provided at the contraction section (101). The internal output end of the wax-type thermal expansion actuator (24) is fixedly connected to the partition plate (23). The temperature sensing end of the wax-type thermal expansion actuator (24) is located at the throat (102) of the contraction section (101). A flow stabilizing component (40) is disposed at the outlet of the diffuser section (103); Demisting component (30), wherein the demisting component (30) is disposed at the air outlet of the flow stabilizing component (40).

2. The high-temperature waste gas treatment device for a high-temperature sterilization autoclave according to claim 1, characterized in that: The air inlet on the air inlet pipe (22) is a downward-convex conical opening.

3. The high-temperature waste gas treatment device for a high-temperature sterilization autoclave according to claim 1, characterized in that: The current stabilizing component (40) includes: The tube body (41) is provided with a honeycomb rectifier (42) inside the tube body (41).

4. The high-temperature waste gas treatment device for a high-temperature sterilization autoclave according to claim 3, characterized in that: The defogging assembly (30) includes: Shell (33); The flow deflector (31) is composed of multiple pairs of deflector plates, each pair including a first deflector plate (311) and a second deflector plate (312), and the first deflector plate (311) and the second deflector plate (312) are arranged in an array of several pairs. The drive assembly (32) is disposed on the housing (33). The drive assembly (32) is used to adjust the angle of the baffle (31). The pipe body (41) is provided with an air volume indicator unit (34). The air volume indicator unit (34) is used in conjunction with the drive assembly (32).

5. The high-temperature waste gas treatment device for a high-temperature sterilization autoclave according to claim 4, characterized in that: The driving component (32) includes: The movable component (321) is composed of multiple pairs of movable plates, each pair including movable plate one (322) and movable plate two (323). Several pairs of movable plates one (322) and movable plate two (323) are arranged in an array. Both ends of the baffle plate one (311) are fixedly connected to connecting rods (324). One end of the connecting rod (324) of the baffle plate one (311) is slidably connected to movable plate one (322), and the other end is rotatably connected to movable plate two (323). The two ends of movable plate one (322) and movable plate two (323) are connected by cross rods. When the cross rods are used to push one side of movable plate one (322), movable plate one (322) and movable plate two (323) move closer or separate synchronously as a whole. Electric cylinder (325) is fixedly connected to the top of housing (33), and the end of the output shaft inside the electric cylinder (325) is fixedly connected to the top of the outermost movable plate (323).

Images