Digestion apparatus for active coke heavy metal detection

Abstract

The utility model discloses a kind of digestion devices for active coke heavy metal detection, it is related to digestion device technical field, the digestion device for active coke heavy metal detection includes reaction tank, pressure relief valve and purification structure, wherein, the reaction tank is equipped with cavity, the pressure relief valve is installed in the reaction tank, for discharging gas in the cavity, the purification structure includes exhaust pipe, collection tank and activated carbon screen, the discharge pipe one end is connected in the pressure relief valve, the collection tank is equipped with purification cavity, the purification cavity is filled with liquid, for absorbing toxic gas, the other end of the exhaust pipe extends to liquid, to discharge gas into liquid, the purification cavity is equipped with the opening being communicated with outside, the activated carbon screen is installed in the opening. By liquid absorption and activated carbon adsorption dual purification mechanism, effectively reduce the concentration of harmful substances in gas, and integrate physical absorption and chemical adsorption unit in pressure relief path, form continuous purification process.

Description

Technical Field

[0001] This utility model relates to the field of digestion device technology, and in particular to a digestion device for detecting heavy metals in activated coke. Background Technology

[0002] Activated carbon is an adsorbent material with abundant pore structure and surface functional groups, capable of adsorbing heavy metals from wastewater, waste gas, and soil. Heavy metal detection of activated carbon is a crucial testing step. After treating heavy metals, activated carbon needs to be tested for the content of adsorbed heavy metals and its adsorption performance to evaluate the treatment effect and recycling value. Microwave digestion equipment is an essential tool for heavy metal detection in activated carbon. Microwave digestion directly heats the substance through two effects: molecular polarization and ionic conductivity, causing the surface layer of the solid sample to break down rapidly, generating new surface and volume interactions, and completely decomposing the sample within minutes.

[0003] Existing microwave digestion equipment integrates ultrasonic functions, using the synergistic effect of microwaves and ultrasound to accelerate the decomposition efficiency of organic matter and the release efficiency of heavy metals in activated char. Since it is mostly carried out in a closed space, the pressure inside the cavity needs to be controlled, which requires the use of sensors and pressure relief devices to regulate the pressure. However, toxic gases, such as strong acid gases, are generated during the digestion process. These toxic gases can easily diffuse into the surrounding environment, causing corrosion to other equipment or irreversible damage if inhaled by staff. Utility Model Content

[0004] The main purpose of this invention is to provide a digestion device for detecting heavy metals in activated coke, which aims to purify the gas emitted by the pressure relief device and prevent workers from inhaling it.

[0005] To achieve the above objectives, the present invention proposes a digestion device for heavy metal detection in activated coke, comprising:

[0006] The reaction vessel has a cavity.

[0007] A pressure relief valve, installed in the reaction vessel, is used to release gas from the cavity; and,

[0008] The purification structure includes an exhaust pipe, a collection box, and an activated carbon mesh. One end of the exhaust pipe is connected to the pressure relief valve. The collection box has a purification chamber filled with liquid for absorbing toxic gases. The other end of the exhaust pipe extends into the liquid to discharge gases into the liquid. The purification chamber has an opening that communicates with the outside, and the activated carbon mesh is installed in the opening.

[0009] Preferably, the collection tank is provided with a partition, and the bottom of the partition is higher than the liquid level.

[0010] The partition divides the air outlet into a gas outlet channel within the collection box, and the opening is provided corresponding to the gas outlet channel.

[0011] Preferably, a plurality of liquid-blocking plates are provided between the partition and the wall of the purification chamber, the liquid-blocking plates are located below the activated carbon mesh, and the plurality of liquid-blocking plates are arranged in an alternating manner along the length of the partition.

[0012] Preferably, a plurality of sponge plates are installed inside the purification chamber, the sponge plates being located between the activated carbon mesh and the liquid-blocking plate to absorb liquid droplets.

[0013] Preferably, each of the sponge boards has multiple through holes, and two adjacent sponge boards are arranged in parallel.

[0014] In the vertical direction, the through holes on two adjacent sponge plates are staggered.

[0015] Preferably, both the activated carbon mesh and the sponge board can be detachably installed in the collection box.

[0016] Preferably, a cooling structure is installed inside the collection box. The cooling structure includes a cooling pipe installed inside the purification chamber, and the cooling pipe is filled with coolant to reduce the liquid temperature.

[0017] Preferably, the cooling structure includes:

[0018] Two connecting boxes are respectively connected to both ends of the cooling pipe and are installed on the left side of the collection box;

[0019] A reservoir filled with coolant; and,

[0020] The liquid pump is connected at one end to the liquid storage tank via a pipe, and at the other end to one of the connection boxes via a pipe.

[0021] Preferably, the collection box has an installation groove for installing the cooling pipe, and a sealing element is provided in the installation groove.

[0022] Preferably, a detection device is provided inside the purification chamber to detect the liquid temperature, and the detection device is electrically connected to the liquid pump.

[0023] In the technical solution provided by this utility model, the purification structure includes an exhaust pipe, a collection box, and an activated carbon mesh. One end of the exhaust pipe is connected to the pressure relief valve. The collection box has a purification chamber filled with liquid for absorbing toxic gases. The other end of the exhaust pipe extends into the liquid to discharge gas into the liquid. The purification chamber has an opening communicating with the outside. The activated carbon mesh is installed in the opening. Through the dual purification mechanism of liquid absorption and activated carbon adsorption, the concentration of harmful substances in the gas is effectively reduced. Furthermore, physical absorption and chemical adsorption units are integrated in the pressure relief path to form a continuous purification process. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A perspective view of an embodiment of the digestion device for heavy metal detection in activated coke provided by this utility model;

[0026] Figure 2 for Figure 1 Cross-sectional schematic diagram of the central purification structure;

[0027] Figure 3 for Figure 1 A cross-sectional schematic diagram of the cooling structure.

[0028] Explanation of icon numbers:

[0029] 1. Reaction vessel; 2. Pressure relief valve; 3. Purification structure; 31. Exhaust pipe; 32. Collection box; 33. Baffle; 34. Liquid blocking plate; 35. Sponge board; 36. Activated carbon mesh; 4. Cooling structure; 41. Cooling pipe; 42. Connection box; 43. Liquid storage tank; 44. Liquid pump; 5. Detection device.

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] This invention provides a digestion device for detecting heavy metals in activated coke. Figures 1 to 3 This is an embodiment of the digestion device for detecting heavy metals in activated coke provided by this utility model.

[0035] Microwave digestion equipment is widely used in the field of activated char heavy metal detection to accelerate sample decomposition and release heavy metal elements. Such equipment usually integrates ultrasonic functions to improve decomposition efficiency. When chemical reactions are carried out in a closed cavity, internal pressure needs to be regulated by a pressure relief device. Since strong acids and other toxic gases are generated during the digestion process, the existing pressure relief structure directly discharges the gas into the external environment, causing corrosive gases to diffuse to the surface of surrounding equipment, causing oxidation and damage to metal parts. At the same time, there is a safety hazard of operators inhaling harmful gases. For example, in continuous testing operations, the gas accumulation may exceed the environmental carrying capacity and cause laboratory air pollution incidents.

[0036] Please refer to the following: Figures 1 to 3 The activated coke heavy metal detection digestion device includes a reaction vessel 1, a pressure relief valve 2, and a purification structure 3. The reaction vessel 1 has a cavity, and the pressure relief valve 2 is installed in the reaction vessel 1 to discharge the gas in the cavity. The purification structure 3 includes an exhaust pipe 31, a collection box 32, and an activated carbon mesh 36. One end of the exhaust pipe is connected to the pressure relief valve 2. The collection box 32 has a purification chamber filled with liquid to absorb toxic gases. The other end of the exhaust pipe 31 extends into the liquid to discharge gas into the liquid. The purification chamber has an opening that communicates with the outside, and the activated carbon mesh 36 is installed in the opening.

[0037] Reaction vessel 1 refers to a corrosion-resistant, sealed container, typically made of polytetrafluoroethylene (PTFE), used to withstand the high-temperature and high-pressure environment during the microwave digestion reaction. Pressure relief valve 2 is a pressure-sensitive control valve, typically a spring-loaded safety valve that automatically opens the exhaust channel when the internal pressure exceeds a set threshold. Exhaust pipe 31 is a gas delivery pipe with acid and alkali resistance, typically connected by a fluororubber hose to ensure airtight transmission between pressure relief valve 2 and collection box 32. Collection box 32 is a purification container with a liquid containment chamber, typically made of double-layered stainless steel, filled with sodium hydroxide solution to neutralize acidic gases. Activated carbon mesh 36 is an adsorption layer with a honeycomb pore structure, typically made of granular activated carbon filled in a metal mesh frame, used to capture volatile organic compounds and small particles in the gas.

[0038] The toxic gases produced during the digestion process include nitrogen oxides, sulfur oxides, hydrogen chloride, hydrogen fluoride, mercury vapor, and volatile organic compounds. There may also be toxic gases such as chlorine, carbon monoxide, and hydrogen sulfide. Sulfur oxides and hydrogen chloride can be neutralized with an appropriate amount of sodium hydroxide solution, or with sodium carbonate or sodium bicarbonate solution. Nitrogen oxides can be neutralized with hydrogen peroxide solution, and hydrogen fluoride can be neutralized with calcium hydroxide solution or lime milk. Different solutions are prepared according to the types of heavy metals contained in the activated coke being detected to carry out the neutralization reaction, so as to eliminate the harmful parts of the gas and ensure the safety of the laboratory personnel.

[0039] During microwave digestion, the gas generated enters the exhaust pipe 31 through the pressure relief valve 2 and is transported along the pipe to the bottom liquid layer of the collection tank 32. Inside the liquid, the gas forms bubbles and rises, where acidic components neutralize with the alkaline solution. The purified gas continues to rise to the upper space of the collection tank 32, where residual pollutants are adsorbed by the porous structure as it passes through the activated carbon mesh 36. Finally, the purified gas is discharged into the external environment through the opening at the top of the collection tank 32, achieving graded treatment of toxic substances. This solves the problem of equipment corrosion and human health hazards caused by the direct emission of toxic gases during microwave digestion. The multi-stage purification structure 3 neutralizes strong acid gases into harmless substances while retaining volatile organic compounds, ensuring laboratory environmental safety and the stability of the testing process.

[0040] Therefore, in the technical solution provided by this utility model, the purification structure 3 includes an exhaust pipe 31, a collection box 32, and an activated carbon mesh 36. One end of the exhaust pipe is connected to the pressure relief valve 2. The collection box 32 has a purification chamber filled with liquid for absorbing toxic gases. The other end of the exhaust pipe 31 extends into the liquid to discharge gas into the liquid. The purification chamber has an opening that communicates with the outside. The activated carbon mesh 36 is installed in the opening. Through the dual purification mechanism of liquid absorption and activated carbon adsorption, the concentration of harmful substances in the gas is effectively reduced. Furthermore, physical absorption and chemical adsorption units are integrated in the pressure relief path to form a continuous purification process.

[0041] In order to effectively separate the gas and liquid contact areas, prevent liquid droplets from entering the activated carbon mesh 36 with the airflow, and ensure the adsorption efficiency and service life of the activated carbon; at the same time, the gas flows in a directional manner in the gas outlet channel to ensure that toxic components are fully absorbed by the liquid and filtered by the activated carbon, thereby reducing the risk of harm to the environment and personnel from the emitted gas, a corresponding structure needs to be designed.

[0042] Specifically, in an embodiment of this utility model, a partition 33 is provided inside the collection box 32, and the height of the bottom side of the partition 33 is higher than the liquid level; the partition 33 divides the collection box 32 into an air outlet channel, and the opening is provided corresponding to the air outlet channel.

[0043] The baffle 33 refers to the plate-like structure installed inside the collection tank 32 to divide the space. It can be made of corrosion-resistant plastic or metal sheet. The design of the bottom side of the baffle 33 being higher than the liquid surface can prevent liquid from directly entering the gas outlet channel and avoid the liquid being carried out by the airflow. The gas outlet channel refers to the gas flow path formed by the baffle 33 and the inner wall of the collection tank 32. It can be achieved by adjusting the length and position of the baffle 33 to guide the gas to flow in a specific direction and reduce the direct impact between the airflow and the liquid surface. The opening refers to the exhaust port that connects to the outside. It can be set on the top or side wall of the collection tank 32. Through the corresponding position of the gas outlet channel, it is ensured that the gas is discharged in a directional manner after being absorbed by the liquid and filtered by the activated carbon.

[0044] When the gas in reaction tank 1 enters exhaust pipe 31 through pressure relief valve 2, it is introduced into the liquid in collection tank 32, where toxic components are absorbed. Gas that is not completely absorbed flows along the outlet channel and is further purified by activated carbon mesh 36. Baffle 33 divides the purification chamber into a liquid area and a gas channel area. The design, with the bottom side higher than the liquid level, prevents liquid from entering the outlet channel due to airflow disturbance. The directional guidance of the outlet channel extends the gas flow path, increasing the contact time with the liquid and reducing the risk of droplets escaping with the airflow. By dividing the gas flow channel into independent channels using baffle 33, combined with liquid level control, backflow of liquid is prevented, and the purification effect is improved by extending the gas purification path.

[0045] Furthermore, a plurality of liquid-blocking plates 34 are provided between the partition 33 and the wall of the purification chamber. The liquid-blocking plates 34 are located on the lower side of the activated carbon mesh 36, and the plurality of liquid-blocking plates 34 are arranged in an alternating manner along the length of the partition 33.

[0046] Liquid barrier 34 refers to a plate-like structure used to block liquid splashing. It can be made of corrosion-resistant materials such as polypropylene or polyethylene and forms a physical barrier through horizontal installation. Staggered arrangement refers to a structure in which plates are arranged alternately along the length of the partition 33. This can be achieved by installing plates of different lengths or angles to form curved airflow channels to extend the gas path.

[0047] When the gas carrying droplets rises from the liquid, the staggered arrangement of the liquid-blocking plates 34 forces the gas to change direction. The droplets are intercepted after multiple impacts with the plate surface and flow back into the liquid. Simultaneously, the staggered arrangement increases the residence time of the gas as it passes through the liquid-blocking plate 34 area, allowing undissolved harmful substances to further react with the liquid. The layer of liquid-blocking plates 34 below the activated carbon mesh 36 effectively blocks droplets carried by the rising gas flow, preventing the liquid from wetting the activated carbon mesh 36 and reducing adsorption efficiency. Through the multi-level staggered liquid-blocking plates 34, the gas-liquid contact area is increased, and multiple interception mechanisms are established, significantly reducing the probability of droplet escape.

[0048] Furthermore, a plurality of sponge plates 35 are installed inside the purification chamber. The sponge plates 35 are located between the activated carbon mesh 36 and the liquid blocking plate 34 to absorb liquid droplets.

[0049] The sponge plate 35 refers to a filter unit made of porous elastic material, specifically polyurethane foam or polyester fiber, whose pore structure can intercept and adsorb liquid particles entrained in the airflow; the activated carbon mesh 36 refers to a filter layer composed of activated carbon particles, specifically honeycomb or mesh structure, which captures organic molecules and acidic substances in the gas through physical adsorption; the liquid blocking plate 34 refers to a metal or plastic baffle 33 with a baffle structure, specifically a corrugated plate or serrated plate structure, which causes droplets to collide and be retained by changing the airflow direction; droplet absorption refers to the adsorption of suspended liquid particles in the gas by the sponge plate 35 through capillary action, which can be achieved by adjusting the pore density and thickness of the sponge plate 35 to capture micron-sized droplets.

[0050] After the gas flows through the liquid for purification, the liquid droplets entrained in the gas flow enter the area of ​​the sponge plate 35 with the rising airflow. The multi-layered parallel arrangement of the sponge plate 35 forces the airflow through an S-shaped path. At this point, the droplets are adsorbed and trapped by the pores after contacting the surface of the sponge plate 35. The through holes of adjacent sponge plates 35 are staggered in the vertical direction, forming a stepped barrier, further increasing the contact time between the droplets and the material. The captured droplets converge downwards along the sponge plate 35 under the action of gravity and eventually flow back into the liquid. The liquid-gas separation mechanism formed by this prevents droplets from entering the activated carbon mesh 36 and causing pore blockage. Through the physical adsorption characteristics of the sponge plate 35 and the multi-layered staggered structure, a three-stage interception of aerosol droplets is achieved, effectively reducing the adsorption efficiency decay of the activated carbon mesh 36 caused by droplet wetting.

[0051] Furthermore, each of the sponge boards 35 has multiple through holes, and two adjacent sponge boards 35 are arranged in parallel; in the vertical direction, the through holes on two adjacent sponge boards 35 are staggered.

[0052] Through holes refer to channels that penetrate the thickness of the sponge board 35. They can be achieved using punching or molding processes, with hole diameters ranging from 2 to 5 millimeters and hole spacing ranging from 1.5 to 3 times the hole diameter. This allows gas to pass through while maintaining the structural strength of the sponge board 35. Parallel arrangement refers to multiple sponge boards 35 arranged with the same spacing and direction. This can be achieved using guide grooves or snap-fit ​​structures to ensure that gas passes evenly through each layer of sponge board 35. Staggered arrangement refers to the through holes of adjacent sponge boards 35 not completely overlapping in the vertical projection direction. This can be achieved by adjusting the installation angle or hole distribution of adjacent sponge boards 35. For example, the offset of the center of the through holes in adjacent layers can be 1 to 2 times the hole diameter. This extends the gas flow path and increases the probability of droplet collision.

[0053] After escaping from the liquid, the gas carries droplets into the purification chamber. It first passes through the through-holes in the lower layer of the sponge plate 35. Due to the offset position of the through-holes in the adjacent upper layer of the sponge plate 35, the gas must navigate around the internal pore structure of the sponge plate 35 to enter the upper layer. During this process, the droplets collide with and are adsorbed by the pore walls of the sponge plate 35, while the gas continues to flow upwards. For example, after the gas passes through the through-holes in the first layer of the sponge plate 35, it must pass through the pores on the sidewalls of the through-holes in the second layer. At this point, the droplets are retained in the gap between the first and second layers of the sponge plate 35 due to inertia. The staggered arrangement of the through-holes creates a non-linear flow path, forcing the gas to change direction multiple times, thereby significantly improving the droplet interception efficiency.

[0054] Both the activated carbon mesh 36 and the sponge board 35 have their service life and need to be replaced. Specifically, both the activated carbon mesh 36 and the sponge board 35 can be detached and installed in the collection box 32.

[0055] Detachable installation means that the activated carbon mesh 36 and the sponge plate 35 are fixed to the preset position of the collection box 32 in a separable manner. Specifically, this can be achieved by using buckles, slide rails, or bolts for quick disassembly and maintenance. The activated carbon mesh 36 is a mesh structure made of activated carbon material, which can be achieved by weaving or pressing molding processes. It is used to adsorb harmful substances remaining in the gas discharged from the purification chamber. The sponge plate 35 is a plate structure made of porous liquid-absorbing material, which can be achieved by using polyurethane or polyethylene foam material. It is used to absorb droplets carried by the gas as it flows through the purification chamber, preventing liquid from entering the activated carbon mesh 36 and affecting the adsorption efficiency.

[0056] An installation frame is provided at the opening of the collection box 32. The activated carbon mesh 36 is embedded in the frame via a slide rail, and the sponge plate 35 is fixed above the liquid-blocking plate 34 by clips. When the activated carbon mesh 36 becomes saturated due to long-term use, or the sponge plate 35 becomes clogged due to absorbing too much liquid, the activated carbon mesh 36 can be directly pulled out along the slide rail for replacement. At the same time, the clips can be released to remove the sponge plate 35 for cleaning or replacement. This design allows for convenient maintenance of the key components of the purification structure 3, preventing toxic gas leakage due to material failure. The detachable design simplifies the maintenance process, reduces downtime, and ensures that the activated carbon mesh 36 and sponge plate 35 are always in effective working condition.

[0057] The gas released by the pressure relief valve 2 has a high temperature, which can easily reduce the neutralization efficiency of toxic gases. Therefore, it is necessary to maintain the temperature of the solution to ensure the neutralization efficiency. In this embodiment of the present invention, a cooling structure 4 is installed in the collection box 32. The cooling structure 4 includes a cooling pipe 41 installed in the purification chamber. The cooling pipe 41 is filled with coolant to reduce the temperature of the liquid.

[0058] Cooling structure 4 refers to a system that controls the liquid temperature through active cooling. Specifically, it can be achieved by linking the coolant circulation pipeline with external cooling equipment. For example, a liquid pump 44 injects low-temperature coolant into the cooling pipe 41 to absorb heat from the liquid. The cooling pipe 41 is a tubular structure with thermal conductivity, which can be a serpentine coiled metal pipe or a plastic pipe. The cooling efficiency is improved by increasing the heat exchange area. The coolant is a liquid medium with high heat capacity, which can be an aqueous solution of ethylene glycol or a special heat transfer oil. Heat is removed from the liquid in the purification chamber through heat exchange in a flowing state.

[0059] When the gas generated during the digestion process enters the liquid in the collection tank 32, the heat released by the gas causes the liquid temperature to rise. At this time, the coolant in the cooling pipe 41 continues to circulate, exchanging heat with the liquid through the pipe wall, thereby controlling the liquid temperature within a preset range. For example, when the liquid temperature is detected to exceed the threshold, the liquid pump 44 can automatically start to increase the coolant flow rate and ensure the cooling effect. By suppressing the rise in liquid temperature through the active cooling structure 4, the liquid's ability to absorb toxic gases is prevented from decreasing due to high-temperature evaporation, while also reducing the risk of secondary pollution caused by liquid evaporation.

[0060] Furthermore, the cooling structure 4 includes two connecting boxes 42, a liquid storage tank 43, and a liquid pump 44. The two connecting boxes 42 are respectively connected to both ends of the cooling pipe 41 and are installed on the left side of the collection box 32. The liquid storage tank 43 is filled with coolant. One end of the liquid pump 44 is connected to the liquid storage tank 43 through a pipe, and the other end is connected to one of the connecting boxes 42 through a pipe.

[0061] The connecting box 42 is a transitional container used to realize the circulation of coolant. It can be implemented using a welded stainless steel box structure, with its internal cavity connected to the cooling pipe 41 to form a closed loop. The reservoir 43 is a container used to store coolant. It can be implemented using a sealed box structure with a liquid level observation window for real-time monitoring of coolant capacity. The pump 44 is a power device used to drive the circulation of coolant. It can be implemented using a centrifugal water pump structure, with an adjustable impeller speed to control the circulation flow rate.

[0062] After being drawn into the reservoir 43 by the pump 44, the coolant is transported through pipelines to the connecting box 42 on the left, and then flows into the cooling pipe 41. The cooling pipe 41 is immersed in the liquid in the purification chamber, exchanging heat with the high-temperature liquid through its pipe wall. The coolant, having absorbed heat, flows back to the reservoir 43 via another connecting box 42, forming a closed-loop circulation. For example, the left side wall of the connecting box 42 and the collection box 32 can be fixed with bolts, the reservoir 43 can be placed independently on the ground, and one-way valves are installed on the inlet and outlet pipes of the pump 44 to prevent backflow. Through the dynamic circulation of coolant and the separate reservoir design, not only is the heat exchange efficiency per unit time improved, but the replenishment and replacement of coolant are also facilitated, avoiding system downtime and maintenance problems caused by aging of the coolant.

[0063] Furthermore, the collection box 32 is provided with an installation groove for installing the cooling pipe 41, and a sealing element is provided in the installation groove.

[0064] The mounting groove is a recessed structure machined into the surface of the collection box 32 to accommodate and fix the cooling pipe 41. It can be implemented using a U-shaped, rectangular, or irregularly shaped groove, and its dimensions can be adjusted according to the outer diameter of the cooling pipe 41. The material can be the same corrosion-resistant metal as the collection box 32. This structure ensures the stability of the mechanical connection between the cooling pipe 41 and the collection box 32. The seal is an elastic component filled between the mounting groove and the contact surface of the cooling pipe 41. It can be implemented using rubber gaskets, silicone sealing strips, or PTFE sealing rings, compensating for the installation gap through elastic deformation. This component prevents liquid or gas leakage from the joint between the mounting groove and the cooling pipe 41, maintaining the pressure balance inside the purification chamber.

[0065] After the cooling pipe 41 is embedded in the mounting groove, an annular gap is formed between its outer wall and the inner wall of the mounting groove. A seal is pre-installed in the bottom or side wall groove of the mounting groove. When the cooling pipe 41 is pressed into the mounting groove, the seal undergoes radial compression and deformation, thus filling the gap. For example, the mounting groove can be configured as a U-shaped section adapted to the outer diameter of the cooling pipe 41, with an annular groove machined on the inner wall for embedding an O-ring. When the cooling pipe 41 is inserted, the O-ring expands under pressure, forming a radial seal. Furthermore, the depth of the mounting groove can be slightly greater than the diameter of the cooling pipe 41, causing the seal to also undergo axial compression deformation, forming a double sealing interface. The seal can be replaced within the mounting groove, for example, through a snap-fit ​​or threaded fixing structure for quick installation and removal. Additionally, a guide bevel can be provided at the edge of the mounting groove to facilitate precise insertion of the cooling pipe 41 and prevent seal misalignment. Through the combined structure of the mounting groove and the seal, a detachable connection is achieved, and the elastic seal compensates for dimensional fluctuations caused by manufacturing tolerances and temperature changes, significantly reducing the risk of liquid leakage.

[0066] Furthermore, a detection device 5 is provided inside the purification chamber to detect the liquid temperature, and the detection device 5 is electrically connected to the liquid pump 44.

[0067] The detection device 5 is a device used to monitor changes in the liquid temperature within the purification chamber. Specifically, it can be implemented using a temperature sensor. The temperature sensor transmits the signal to the control system by monitoring real-time changes in the liquid temperature. The liquid pump 44 is a power device used to transport the coolant. Specifically, it can be implemented using an electric pump. The electric pump connects to the storage tank 43 and the connecting box 42 via pipes to achieve the circulation of the coolant.

[0068] A detection device 5 is installed inside the purification chamber. When the liquid temperature rises due to the heat generated by absorbing toxic gases, the detection device 5 transmits a temperature signal to the liquid pump 44. The liquid pump 44 adjusts the circulation flow rate of the coolant according to the temperature change. For example, when the liquid temperature exceeds a set threshold, the liquid pump 44 automatically increases the coolant circulation rate, rapidly reducing the liquid temperature through the cooling pipe 41, thereby maintaining the liquid's absorption efficiency for toxic gases. The linkage control between the detection device 5 and the liquid pump 44 can prevent the problem of decreased toxic gas absorption capacity due to excessively high liquid temperature. Through the automatic linkage between the detection device 5 and the liquid pump 44, the cooling effect can be dynamically adjusted according to temperature changes, which not only prevents the liquid from overheating and causing gas absorption failure, but also reduces the need for manual intervention, improving the safety and stability of the digestion process.

[0069] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A digestion device for detecting heavy metals in activated coke, characterized in that, include: The reaction vessel has a cavity. A pressure relief valve, installed in the reaction vessel, is used to release gas from the cavity; as well as, The purification structure includes an exhaust pipe, a collection box, and an activated carbon mesh. One end of the exhaust pipe is connected to the pressure relief valve. The collection box has a purification chamber filled with liquid for absorbing toxic gases. The other end of the exhaust pipe extends into the liquid to discharge gases into the liquid. The purification chamber has an opening that communicates with the outside, and the activated carbon mesh is installed in the opening. The collection tank is equipped with a partition, and the bottom of the partition is higher than the liquid level. The partition divides the air outlet channel inside the collection box, and the opening is provided corresponding to the air outlet channel; Multiple liquid-blocking plates are provided between the partition and the wall of the purification chamber. The liquid-blocking plates are located below the activated carbon mesh, and the multiple liquid-blocking plates are arranged in an alternating manner along the length of the partition. Multiple sponge plates are installed inside the purification chamber. The sponge plates are located between the activated carbon mesh and the liquid blocking plate to absorb liquid droplets. Each of the sponge boards has multiple through holes, and two adjacent sponge boards are arranged in parallel. In the vertical direction, the through holes on two adjacent sponge plates are staggered. Both the activated carbon mesh and the sponge board can be detachably installed in the collection box.

2. The digestion device for heavy metal detection in activated coke as described in claim 1, characterized in that, The collection box is equipped with a cooling structure, which includes a cooling pipe installed in the purification chamber. The cooling pipe is filled with coolant to reduce the liquid temperature.

3. The digestion device for heavy metal detection in activated coke as described in claim 2, characterized in that, The cooling structure includes: Two connecting boxes are respectively connected to both ends of the cooling pipe and are installed on the left side of the collection box; A reservoir filled with coolant; and, The liquid pump is connected at one end to the liquid storage tank via a pipe, and at the other end to one of the connection boxes via a pipe.

4. The digestion device for heavy metal detection in activated coke as described in claim 3, characterized in that, The collection box has an installation slot for installing the cooling pipe, and a sealing element is provided in the installation slot.

5. The digestion device for heavy metal detection in activated coke as described in claim 3, characterized in that, The purification chamber is equipped with a detection device for detecting the liquid temperature, and the detection device is electrically connected to the liquid pump.

Images