Industrial halogen waste gas treatment process and treatment equipment

Abstract

The invention discloses an industrial halogen waste gas treatment process and treatment equipment, and relates to the technical field of waste gas treatment.The industrial halogen waste gas treatment process comprises the following steps that S1, water washing and secondary spraying washing are conducted after alkali washing; s2, cooling treatment is performed after filtration; s3, adsorption in a resin adsorption tank; s4, inputting saturated steam into the resin adsorption tank; s5, condensing by a condenser; and S6, respectively discharging and storing after gas-liquid separation and oil-water separation. Treatment equipment comprises a shell, a feeding pipe, an exhaust pipe, three discharging pipe fittings and two pile casings. The shell is internally provided with a layered space; the three discharging pipe fittings are respectively used for discharging three layers of different substances; the pile casing is vertically arranged; and the two pile casings are respectively in one-to-one correspondence with the two discharging pipe fittings for discharging two layers of substances at the bottom of the mixture. The purification treatment efficiency and effect of the halogen waste gas can be effectively improved, and meanwhile, the safety in the purification treatment process of the halogen waste gas can be effectively guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to an industrial halogen waste gas treatment process and treatment equipment. Background Art

[0002] Industrial halogen waste gas refers to gaseous pollutants containing halogen elements such as fluorine, chlorine, and bromine. It primarily originates from chemical production (such as fluorine chemicals and chlor-alkali), electronics manufacturing (chip etching and cleaning), waste incineration, and metal smelting. This type of waste gas is highly toxic and corrosive, not only directly harming humans and facilities but also damaging the ozone layer, causing acid rain, and, under certain conditions, generating dioxins, a highly toxic carcinogen.

[0003] Therefore, in the existing chemical production process, halogen waste gas is usually purified by methods such as alkaline solution absorption, catalytic decomposition, high-temperature incineration and activated carbon adsorption.

[0004] Alkali absorption technology requires appropriate wastewater treatment equipment, and the high temperatures encountered during catalytic decomposition and high-temperature incineration processes may produce dioxins. Activated carbon treatment of highly concentrated halogenated waste gas requires a long residence time to ensure compliance with emission standards. After high-temperature desorption and regeneration, its structural stability and adsorption activity rapidly decline, leading to high replacement frequency and operating costs. Furthermore, when the halogenated waste gas concentration at the exhaust inlet is high, the activated carbon's significant adsorption heat effect can cause a sharp rise in the adsorption bed temperature. Its hygroscopicity also directly affects its adsorption capacity, potentially posing a safety hazard. Summary of the Invention

[0005] The present application provides an industrial halogen waste gas treatment process and treatment equipment, which can effectively improve the efficiency and effect of halogen waste gas purification treatment, and at the same time effectively ensure the safety of the halogen waste gas purification treatment process.

[0006] On the one hand, the present application provides an industrial halogen waste gas treatment process, which adopts the following technical solutions: An industrial halogen waste gas treatment process comprises the following steps: S1, alkali washing followed by water washing and secondary spray washing; S2, cooling treatment after filtration; S3, resin adsorption tank adsorption; S4, saturated steam is input into the resin adsorption tank; S5, condenser condensation; S6. After gas-liquid separation and oil-water separation, they are discharged and stored separately.

[0007] By adopting the above technical solution, the pretreated halogen waste gas enters the resin adsorption tank, and the organic molecules in the waste gas can be captured by the microporous structure of the polymer macroporous adsorption resin when passing through it, thereby purifying the halogen waste gas; compared with activated carbon, the polymer macroporous adsorption resin is more sustainable, more selective and less affected by thermal effects, so it can effectively improve the purification efficiency and effect of halogen waste gas, and at the same time can effectively ensure the safety of the halogen waste gas purification process.

[0008] Optionally, in S5 , the gas-liquid mixture after desorption is subjected to secondary condensation, and the gas-liquid mixture is pressurized after the primary condensation.

[0009] By adopting the above technical solution, the gas-liquid mixture after desorption can condense most of the water vapor after the first-stage condensation, thereby reducing the load and operating energy consumption of the rear-end pressurizing equipment; at the same time, pressurizing through the pressurizing equipment can increase the dew point temperature of the gas-liquid mixture, reduce the condensation energy consumption and improve the recovery rate of the organic solvent, and reduce the concentration of the reflux non-condensable gas.

[0010] Optionally, in S4, an analog regulating valve is provided on the main pipe for saturated steam input to control the input flow of saturated steam according to the needs of different stages of the desorption process.

[0011] By adopting the above technical solution, non-constant flow steam desorption can be achieved, which can effectively reduce the steam input cost while ensuring the desorption effect and efficiency of the resin adsorption tank, thereby effectively reducing the subsequent condensation cost of the condenser, shortening the condensation time and improving the efficiency of halogen waste gas purification treatment.

[0012] On the other hand, the present application also provides a processing device, which adopts the following technical solution: A treatment device is used in the above-mentioned industrial halogen waste gas treatment process and is used in S6, comprising a shell, a feed pipe, an exhaust pipe, three discharge pipes and two casings; The interior of the shell has a buffer space and a stratification space for the gas-liquid mixture obtained by the desorption stage of the halogen waste gas purification treatment to stand and stratify. The buffer space and the stratification space are separated by the partition, and the bottom of the partition allows the buffer space and the stratification space to communicate with each other. After standing, the mixture is divided into three layers, the middle layer is water, the upper layer is a solvent layer with a specific gravity of less than 1, and the lower layer is a solvent layer with a specific gravity greater than 1. The feed pipe is arranged on one side of the shell, and one end of the feed pipe is communicated with the top of the buffer space; the exhaust pipe is arranged at the top of the shell, and one end of the exhaust pipe is communicated with the top of the stratification space. The three discharge pipes are all arranged on a side of the shell away from the feed pipe, and one end thereof is in communication with the stratified space; the positions where the three discharge pipes communicate with the stratified space are spaced apart in the vertical direction, and the three discharge pipes are respectively used to discharge three different layers of substances in the mixture; The casing is vertically arranged in the shell and is located in the stratified space near the discharge pipe, with its top located above the liquid surface of the mixture and its bottom immersed in the mixture; the two casings respectively correspond to the two discharge pipes for discharging the two layers of material at the bottom of the mixture, the bottom of the casing is immersed in the bottom of the corresponding material layer, and the end of the discharge pipe communicating with the stratified space is communicated with the internal space of the corresponding casing.

[0013] By adopting the above technical solution, the multi-component mixture obtained by halogen waste gas purification treatment can be conveniently allowed to stand and stratify, the efficiency and effect of gas-liquid separation and oil-water separation can be improved, the universality of the oil-water separation function for light and heavy components relative to water can be achieved, and the reliability and stability of the discharge pipe in discharging the corresponding substances can be improved.

[0014] Optionally, the discharge pipe includes a fixed pipe, a telescopic pipe and an adjustment component; The fixed tube is fixedly connected to the housing; the telescopic tube is movably connected to the fixed tube in the vertical direction, and maintains communication with the fixed tube during movement, with the end thereof away from the fixed tube being located in the corresponding material layer; the adjustment assembly is disposed on the housing and is used to drive the corresponding telescopic tube to move; The telescopic tube includes a connecting portion and a telescopic portion, and the adjustment assembly includes a threaded rod; the two ends of the telescopic portion are respectively connected to the connecting portion and the fixed tube, the threaded rod is vertically arranged and cooperates with the top thread of the shell, and its bottom is rotatably connected to the connecting portion, and the rotation axis of the threaded rod coincides with the axis of its own thread.

[0015] By adopting the above technical solution, the staff can adjust the height position of the inlet end of the discharge pipe in the stratified space according to needs, so that the processing equipment can achieve stratified discharge effect according to the stratification conditions of different mixtures.

[0016] Optionally, two transparent observation windows are further included; windows for installing the observation windows are provided on both sides of the shell, and the observation windows cover the parts of the three discharge pipes located in the layered space and the two protective tubes along the observation direction, and the protective tubes are transparent.

[0017] By adopting the above technical solution, the staff can observe the stratification of the mixture in the stratification space through the observation window, and at the same time can observe the discharge situation of the three discharge pipes, so that the staff can adjust the three discharge pipes according to the stratification situation.

[0018] Optionally, the telescopic tube further includes a floating portion; The density of the floating portion is lower than the density of the uppermost material layer, and the floating portion is movably connected to the connecting portion in the vertical direction, and an indicator rod is extended upward in the vertical direction; the indicator rod is fitted with the shell and passes through the top of the shell, and the surface of the indicator rod is marked with a scale for indicating the liquid level height inside the corresponding casing.

[0019] By adopting the above technical solution, when the staff cannot directly observe the liquid level conditions of the materials inside the two casings and the discharge conditions of the three discharge pipes through the observation window, the liquid level conditions of the materials inside the casings can be known through the indicator rod, thereby facilitating the staff to adjust the three discharge pipes in time when the stratification conditions of the mixture in the stratification space change; in addition, the floating part can guide the connecting part during the process of movable adjustment, thereby effectively improving the stability of the movable adjustment of the adjustable component of the connecting part.

[0020] Optionally, a buffer plate is also included; The buffer plate is arranged on the upper part of the partition, which is located on the lower side of the partition close to the feed pipe outlet and inclined downward towards the feed pipe; the buffer plate and the position where the feed pipe is connected to the buffer space are both located above the mixture, and the end of the feed pipe connected to the buffer space faces the buffer plate.

[0021] By adopting the above technical solution, the mixture entering the stratification space through the feed pipe can be buffered and wave-dissipated, thereby further reducing the impact of the new mixture entering the stratification space on the mixture originally statically stratified in the stratification space.

[0022] Optionally, a plurality of guide plates are also included; The guide plate is vertically arranged in the stratified space and is located on a side of the partition away from the feed pipe, and the position where the exhaust pipe communicates with the stratified space is also located on a side of the partition away from the feed pipe; There is a distance between the bottom of the guide plate and the inner wall of the bottom of the stratified space, and there is also a distance between one side of the guide plate and the inner wall of one side of the stratified space; multiple guide plates are distributed at equal intervals in the stratified space, and multiple guide plates together form a serpentine trajectory in the stratified space to guide the flow of the mixture.

[0023] By adopting the above technical solution, the time for the mixture entering the stratification space to flow and contact the discharge pipe can be extended, and the impact of the mixture flow on the statically stratified mixture can be reduced, so that the mixture has sufficient time to statically stratify, and the gas in the mixture can be facilitated to move upward and separate during the flow, so as to improve the effect and safety of the processing equipment in achieving stratified discharge.

[0024] In summary, this application has at least one of the following beneficial effects: 1. It can effectively improve the efficiency and effect of halogen waste gas purification treatment, and at the same time effectively ensure the safety of the halogen waste gas purification process; 2. It can achieve stratified discharge, thereby effectively improving the efficiency and effect of gas-liquid separation and oil-liquid separation; 3. It can facilitate the staff to adjust the discharge pipe according to the different conditions of the static stratification of the mixture obtained during the halogen waste gas purification process, thereby improving the reliability and stability of the discharge pipe in discharging the corresponding substances; 4. It can effectively improve the reliability and safety of stratified discharge, so that the mixture can be effectively separated into gas and liquid during the static stratification process, reducing the danger of the substance being discharged due to the gas phase. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of an industrial halogen waste gas treatment process according to Example 1; Figure 2 is a schematic diagram of an industrial halogen waste gas treatment process according to Example 2; Figure 3 is a schematic diagram of an industrial halogen waste gas treatment process according to Example 3; Figure 4 This is a schematic structural diagram of a processing device according to Example 4; Figure 5 is a cross-sectional view of a processing device in Example 4; Figure 6 This is a schematic diagram of the structure inside the casing in a treatment device in Example 4; Figure 7 is a side view of a processing device in Example 5; Figure 8 is a side view of a processing device in Example 5 as viewed through an observation window; Figure 9 This is a side view of a processing device in Example 5 observed through an observation window and a casing.

[0026] Explanation of the accompanying symbols: 1. Shell; 11. Layered space; 12. Diversion channel; 13. Window; 14. Buffer space; 2. Feed pipe; 3. Exhaust pipe; 4. Discharge pipe; 41. Fixed pipe; 42. Telescopic pipe; 421. Connecting part; 422. Telescopic part; 423. Floating part; 4231. Indicator rod; 43. Adjustment assembly; 431. Threaded rod; 5. Casing; 6. Partition; 7. Buffer plate; 8. Guide plate; 9. Observation window; 101. Halogen exhaust gas; 102. Scrubbing tower; 103. Filter; 104. Adsorption tank; 105. Saturated steam; 106. Condenser; 107. Separation equipment; 108. Pressurizing device; 109. Analog regulating valve. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-9 This application is described in further detail.

[0028] Example 1: Reference Figure 1 The present invention discloses an industrial halogen waste gas treatment process, comprising the following steps: S1. Alkaline washing followed by water washing and secondary spray washing.

[0029] The halogen waste gas 101 in industrial production is collected by negative pressure in a pipeline and introduced into a system for treating the industrial halogen waste gas 101 , and then enters a washing tower 102 where the halogen waste gas 101 is washed.

[0030] The halogen waste gas 101 is washed in two washing towers 102 in succession. The two washing towers 102 are alkali washing and water washing respectively. The acidic components in the halogen waste gas 101 are first removed by alkali washing, and then the dust impurities in the halogen waste gas 101 are removed by water washing.

[0031] S2, cooling treatment after filtration.

[0032] The washed halogen waste gas 101 is sent to the filter 103 for filtration. In this embodiment, the filter 103 is preferably a bag filter 103, and the washed halogen waste gas 101 is preferably filtered through two filters 103. In other embodiments, different filters 103 may be used to filter the washed halogen waste gas 101, and the washed halogen waste gas 101 may also be filtered through one or more filters 103 as needed.

[0033] After the halogen waste gas 101 is filtered and cooled, it needs to be temperature-regulated by a surface cooler to adjust its temperature to less than 30° C., thereby completing the pretreatment of the halogen waste gas 101 .

[0034] S3. The resin adsorption tank 104 performs adsorption.

[0035] The pretreated halogen waste gas 101 is transported into the resin adsorption tank 104, entering from the bottom and exiting from the top. The organic molecules in the halogen waste gas 101 will be captured by the microporous structure of the polymer macroporous adsorption resin when passing through the resin adsorption tank 104, thereby purifying the halogen waste gas 101. The halogen waste gas 101 meets the emission standards after being purified by the resin adsorption tank 104.

[0036] In this embodiment, the pretreated halogen waste gas 101 is preferably adsorbed by two resin adsorption tanks 104 , and the system preferably adopts the principle of "two in use and one in reserve" and includes a total of three resin adsorption tanks 104 (one of which is on standby).

[0037] S4. Saturated steam 105 is input into the resin adsorption tank 104.

[0038] The saturated steam 105 of the industrial production plant is input into the resin adsorption tank 104 for adsorption treatment of the halogen waste gas 101, so that the organic matter adsorbed by the resin in the resin adsorption tank 104 is desorbed.

[0039] During the desorption process, saturated steam 105 is regulated by a steam pressure reducing valve and enters the resin adsorption tank 104, where it is purged and heated. Under high temperature, the organic matter adsorbed on the resin is replaced by the affinity of water molecules for the resin. The final desorption product is a mixture of water vapor and organic gas.

[0040] After the resin in the resin adsorption tank 104 is desorbed under the action of saturated steam 105, the resin will absorb a large amount of water, which will seriously affect its next round of treatment effect on the halogen waste gas 101. It must be left to stand for 10 minutes to drain the free water and then dried.

[0041] During the drying process, room-temperature air is continuously circulated and purged from top to bottom through the resin. After a certain period of drying and purging, the moisture in the resin is completely purged, restoring its adsorption activity. The resin then waits for a period of time before being used for the next round of adsorption treatment of halogen waste gas 101. In practical applications, the length of time the resin adsorption tank 104 remains stationary and dry after adsorption can be set based on the specific needs of the industrial halogen waste gas 101 treatment system.

[0042] S5. Condensation in the condenser 106.

[0043] The desorbed mixture (high-concentration, high-temperature organic waste gas and steam) is cooled by the condenser 106 to obtain a gas-liquid mixture. In this embodiment, the condenser 106 is preferably a shell and tube condenser 106 .

[0044] In this embodiment, considering that some organic components in the mixture have a low boiling point, the system preferably adopts a two-stage condensation method to condense the mixture, and the two condensers 106 use normal temperature cooling water and chilled water to exchange heat with the mixture respectively; and the desorbed mixture is preferably condensed to less than 40°C through the first condenser 106, and then condensed to about 10°C through the second condenser 106.

[0045] S6. After gas-liquid separation and oil-water separation, they are discharged and stored separately.

[0046] The separation equipment 107 performs gas-liquid separation and oil-water separation on the condensed gas-liquid mixture, and the non-condensable gas is sent back to the resin adsorption tank 104 for further adsorption. The remaining mixture liquid will separate into layers after standing, and will be discharged through pipelines and stored separately.

[0047] In this embodiment, the preferred system first performs gas-liquid separation and then oil-water separation on the condensed gas-liquid mixture, and the preferred mixture liquid will be divided into three layers after standing. The substances in the three layers are, from top to bottom, benzene, alcohol and aldehyde VOCs (volatile organic compounds) with a density less than water, water, and dichloromethane with a density greater than water.

[0048] Example 2: Reference Figure 2 The difference between this embodiment and embodiment 1 is that, in order to reduce the burden of the condenser 106 on the desorbed gas-liquid mixture, the desorbed gas-liquid mixture is preferably subjected to secondary condensation in S5, and a pressurizing device 108 is added between the two condensations.

[0049] The mixed gas in the gas-liquid mixture first enters the primary condenser 106 for preliminary condensation (water cooling at 35-40°C), and then enters the gas-liquid separator to filter the water vapor generated by the condensation.

[0050] Afterwards, the mixed gas after gas-liquid separation is pressurized by the pressurizing device 108, which increases the saturated initial pressure of the mixed gas by compression, and compresses the mixed gas to 0.5-1.2 MPa. In this embodiment, the pressurizing device 108 is preferably a variable frequency screw compressor.

[0051] Finally, the mixed gas pressurized by the pressurizing device 108 enters the secondary condenser 106 for secondary condensation (5-10° C. water cooling) to condense most of the water and high-boiling-point substances, thereby improving the recovery rate of the organic solvent. Example 3: Reference Figure 3The difference between this embodiment and embodiment 1 is that the organic molecules adsorbed by the resin in the resin adsorption tank 104 can be desorbed when the temperature rises to a certain temperature. At this time, if the saturated steam 105 is input at the previous rate, not only will the positive effect of the saturated steam 105 in the desorption process of the organic molecules be reduced, but the temperature of the desorbed organic molecules is too high, which will also increase the burden of condensation of the subsequent condenser 106. Therefore, an analog regulating valve 109 is installed on the pipeline for inputting the saturated steam 105 into the resin adsorption tank 104.

[0052] The analog control valve 109 controls the flow of saturated steam 105 into the resin adsorption tank 104. This allows personnel to adjust the flow of saturated steam 105 based on the dynamic desorption requirements of organic molecules in the resin adsorption tank 104 and the desorption temperature. This dynamic demand can be flexibly adjusted based on the workshop production load and operational data. In this embodiment, the resin adsorption tank 104 is also equipped with a temperature sensor connected to the analog control valve 109. This allows the analog control valve 109 to adjust the efficiency of the saturated steam 105 input in real time based on the temperature rise within the resin adsorption tank 104.

[0053] Example 4: Reference Figure 4 The embodiment of the present application discloses a processing device, which is applied to an industrial halogen waste gas treatment process as disclosed in Example 1, and is used in S6. It can simultaneously realize gas-liquid separation and oil-water separation of the gas-liquid mixture, so as to facilitate the separate discharge and storage of different substances in the mixture.

[0054] Reference Figure 4 and Figure 5 The processing equipment includes a shell 1, a feed pipe 2, an exhaust pipe 3, three discharge pipes 4, two casings 5, a partition 6, a buffer plate 7, and multiple guide plates 8. The shell 1 is used to separate the gas-liquid mixture from the gas-liquid mixture and the oil-water mixture. The feed pipe 2 is used to input the gas-liquid mixture. The exhaust pipe 3 is used to discharge non-condensable gases. The discharge pipe 4 is used to discharge the liquid mixture, and the three discharge pipes 4 are used to discharge different substances respectively. The casing 5 is used to assist in the discharge of stratified substances. The partition 6 is used to reduce the impact of the gas-liquid mixture on the stratified liquid mixture. The buffer plate 7 is used to further reduce the impact of the gas-liquid mixture on the stratified liquid mixture, and can effectively reduce bubbles in the liquid mixture. The guide plates 8 are used to guide the flow of the liquid mixture, prolong its flow time, and facilitate the elimination of bubbles and stratification.

[0055] The housing 1 has an overall rectangular parallelepiped structure, internally comprising a buffer space 14 for rapid and stable stratification of the gas-liquid mixture and a stratification space 11 for static stratification of the gas-liquid mixture. Stratification space 11 is also rectangular. In this embodiment, the housing 1 is preferably installed in a vertical position in its height direction, with the length direction of stratification space 11 parallel to the length direction of the housing 1 and the width direction of stratification space 11 parallel to the width direction of the housing 1.

[0056] The partition 6 is a rectangular plate-like structure as a whole. It is fixedly installed inside the shell 1 in a vertical position in its own length direction, and it separates the inside of the shell 1 into a buffer space 14 and a layered space 11; the top of the partition 6 is fixedly connected to the shell 1, and the two sides of the partition 6 in the width direction are respectively fixedly connected to the inner walls on both sides of the width direction of the layered space 11 and its width direction is parallel to the width direction of the shell 1, and there is a space between the bottom of the partition 6 and the inner wall of the bottom of the layered space 11 for the buffer space 14 to communicate with the layered space 11.

[0057] The feed pipe 2 is fixedly installed on one side of the shell 1 in the longitudinal direction and close to the top of the shell 1, and the gas-liquid mixture enters the buffer space 14 along it; the position where the feed pipe 2 communicates with the buffer space 14 is above the liquid level of the liquid mixture in the buffer space 14, and preferably, the feeding direction of the gas-liquid mixture when entering the buffer space 14 through the feed pipe 2 is vertically downward.

[0058] At this time, the gas-liquid mixture entering the buffer space 14 through the feed pipe 2 will be buffered in the buffer space 14 first, and will begin to stand and separate after the liquid mixture passes through the partition 6 and enters the stratification space 11.

[0059] The buffer plate 7 is a rectangular plate-like structure as a whole, one end of which is fixedly connected to the partition 6 in the width direction, and is located on the side of the partition 6 close to the feed pipe 2; the length direction of the buffer plate 7 is parallel to the width direction of the partition 6, and it is installed obliquely on the partition 6, and its width direction extends obliquely downward toward the direction close to the feed pipe 2; the buffer plate 7 is located above the liquid level of the liquid mixture in the buffer space 14, and the end of the feed pipe 2 that is connected to the buffer space 14 is along the feed direction of the gas-liquid mixture toward the inclined surface of the top of the buffer plate 7.

[0060] At this time, the buffer plate 7 will play a role in buffering and eliminating waves for the gas-liquid mixture entering the buffer space 14 through the feed pipe 2, which can not only further effectively reduce the impact of the gas-liquid mixture entering the buffer space 14 on the original static stratified gas-liquid mixture in the stratification space 11, but also effectively reduce the bubbles generated in the liquid mixture after the gas-liquid mixture merges with the original gas-liquid mixture.

[0061] The guide plate 8 is a rectangular plate-shaped structure as a whole, one side of which in the width direction is fixedly connected to the inner wall of one side of the stratification space 11 in the width direction, and its length direction is parallel to the height direction of the shell 1; the top of the guide plate 8 is located above the liquid level of the liquid mixture, and there is a certain distance between the bottom of the guide plate 8 and the inner wall of the bottom of the stratification space 11; the guide plate 8 is located in the stratification space 11, and multiple guide plates 8 are evenly spaced along the length direction of the shell 1, and the connection positions of adjacent guide plates 8 and the shell 1 are respectively located on the inner walls on different sides of the width direction of the stratification space 11; the multiple guide plates 8 form a serpentine trajectory guide channel 12 for guiding the flow of the liquid mixture on the side of the partition 6 away from the feed pipe 2, so as to extend the speed of the liquid mixture flowing in the stratification space 11 in the direction away from the feed pipe 2. In this process, the liquid mixture can be fully statically stratified, and it can also facilitate the bubbles in the liquid mixture to float upward to defoam or float on the liquid surface of the liquid mixture, and the bubbles floating on the liquid surface will be intercepted by multiple guide plates 8, reducing the probability of the bubbles being discharged with the stratified substances. In this embodiment, it is preferred that the bottom of the guide plate 8 and the bottom of the partition plate 6 are aligned in the horizontal direction.

[0062] Exhaust pipe 3 is fixedly mounted on the top of housing 1 to discharge non-condensable gases. Its bottom communicates with the top of stratified space 11. The location where it communicates with stratified space 11 is located on the side of partition 6 facing away from feed pipe 2 and above the liquid mixture level. In this embodiment, exhaust pipe 3 is preferably located above the plurality of guide plates 8.

[0063] Reference Figure 4 and Figure 6 The discharge pipe 4 is installed on the side of the shell 1 away from the feed pipe 2 in the length direction, and is located on the side of the multiple guide plates 8 away from the partition 6. It is used to discharge the statically layered liquid mixture, and the three discharge pipes 4 correspond to the discharge of three layers of different substances.

[0064] The discharge pipe 4 includes a fixed pipe 41 , a telescopic pipe 42 and an adjustment assembly 43 .

[0065] The fixed tube 41 is fixedly installed on the side of the shell 1 away from the feed tube 2 in the length direction, and the telescopic tube 42 is movably installed on the end of the fixed tube 41 located in the layered space 11, and the movement direction of the telescopic tube 42 is vertical; the adjustment component 43 is installed on the top of the shell 1, and it is used to control the movement of the telescopic tube 42 relative to the fixed tube 41.

[0066] The telescopic tube 42 includes a connecting portion 421 for connecting with the adjustment assembly 43 and a telescopic portion 422 having a telescopic adjustment function, and the connecting portion 421 is fixedly connected to the end of the fixed tube 41 through the telescopic portion 422. In this embodiment, the telescopic portion 422 is preferably a bellows.

[0067] Adjustment assembly 43 includes a threaded rod 431, which engages with the top thread of housing 1. Its bottom is rotatably connected to connecting portion 421, and its rotation axis coincides with its own axis. By controlling the rotation of threaded rod 431 relative to housing 1, the distance between connecting portion 421 and fixed tube 41 can be adjusted, and telescopic portion 422 will adaptively deform as connecting portion 421 is adjusted. In this embodiment, one side of threaded rod 431 preferably has a structure that allows staff to determine the height position of connecting portion 421 in layered space 11 after adjustment, facilitating accurate adjustment of connecting portion 421 using adjustment assembly 43.

[0068] The three discharge pipes 4 are spaced apart in the vertical direction on one side of the shell 1 , and the ends of the three telescopic tubes 42 away from the corresponding fixed tubes 41 are respectively located in the corresponding material layers, so that the three layers of material obtained by static stratification of the liquid mixture can be discharged through the corresponding discharge pipes 4 .

[0069] The casing 5 is a hollow cylindrical structure as a whole. It is fixedly installed in the layered space 11 in a vertical position in the axial direction and is located in the layered space 11 near the discharge pipe 4. In this embodiment, the casing 5 is preferably fixedly connected to the top of the shell 1 through a connecting structure, and the connecting structure is omitted in the drawings.

[0070] The two casings 5 ​​correspond one-to-one with the two discharge pipes 4 used to discharge the two layers of material at the bottom. The top of the casing 5 is located above the liquid surface of the liquid mixture, and the bottom of the casing 5 is immersed in the corresponding material layer. The ends of the corresponding telescopic tube 42 and fixed tube 41 are both located in the space inside the casing 5. When the material layer has a tendency to rise in liquid level, the increased material will preferentially enter the space inside the corresponding casing 5, facilitating its discharge by the corresponding discharge pipe 4. In this embodiment, the three fixed tubes 41 of the three discharge pipes 4 are preferably distributed vertically on the shell 1 according to the vertical distribution pattern of their corresponding material layers, so that the staff can accurately determine the material discharged by different fixed tubes 41.

[0071] The implementation principle of a processing device in the embodiment of the present application is as follows: After the gas-liquid mixture enters the buffer space 14 through the feed pipe 2, it is first buffered and wave-dissipated by the buffer plate 7, which reduces its impact on the liquid mixture that was originally statically layered in the stratification space 11 and reduces bubbles generated when the gas-liquid mixture mixes with the liquid mixture that was originally statically layered in the stratification space 11. The gas-liquid mixture then moves through the space below the partition 6 into the stratified space 11. The non-condensable gas in the gas-liquid mixture moves to the top of the stratified space 11 and is discharged through the exhaust pipe 3. The liquid mixture flows along the guide channel 12. During the flow, the bubbles inside the mixture gradually float up and defoam or are intercepted by the multiple guide plates 8, thereby effectively reducing the probability of subsequent bubbles being discharged with the liquid mixture after static stratification. The liquid mixture is statically stratified in the stratification space 11 to form three material layers, which can be discharged and stored respectively through the three discharge pipes 4; and two of the discharge pipes 4 can ensure the reliability of discharging the corresponding material layers with the assistance of the corresponding casings 5; and the adjustment components 43 of the discharge pipes 4 can facilitate the staff to adjust the height positions of the three telescopic tubes 42 according to the static stratification conditions of the liquid mixture in the stratification space 11, so that the discharge pipes 4 can stably and reliably discharge the corresponding material layers.

[0072] Example 5: Reference Figure 7 and Figure 8 The difference between this embodiment and embodiment 4 lies in the discharge pipe 4 and the shell 1, which can further facilitate the staff to know the stratification situation of the liquid mixture in the stratification space 11, so that the staff can adjust the three discharge pipes 4 in time according to the stratification situation to ensure that the different substances in the subsequent static stratification can be discharged smoothly.

[0073] Two observation windows 9 are installed on the housing 1 for workers to observe the layered space 11. Window openings 13 are provided on either side of the housing 1 along its width, corresponding to the observation windows 9. The observation windows 9 are transparent and, after installation, fill the windows 13. They are aligned along the width of the housing 1 with the area of ​​the layered space 11 on the side of the guide plate 8 facing away from the partition 6. In this embodiment, the observation windows 9 are preferably made of glass, and the two windows 13 are preferably aligned along the width of the housing 1. This allows workers on both sides of the housing 1 to observe the conditions within the layered space 11 through the observation windows 9. The observation window 9 on the other side of the worker provides more light, providing a clearer view of the layered space 11.

[0074] The two protective tubes 5 are both located within the observation range of the observation window 9, and the protective tubes 5 are transparent, so that the staff can observe the situation of the internal space thereof through the protective tubes 5. In this embodiment, the protective tubes 5 are preferably also made of glass.

[0075] The portions of the three discharge pipes 4 located in the stratified space 11 are concentrated in the material layer (water) in the middle after static stratification, making it convenient for the staff to observe the liquid level of the material inside the casing 5 and the position of the corresponding telescopic tube 42 inside the casing 5 through the observation window 9 and through the casing 5.

[0076] Reference Figure 8 and Figure 9 , among which, the portion of the discharge pipe fitting 4 corresponding to the material layer located at the top that is located in the layered space 11 is mostly located in the material layer located in the middle; the discharge pipe fitting 4 corresponding to the material layer located in the middle and the discharge pipe fitting 4 corresponding to the material layer located at the bottom are all located in the middle material layer as a whole, and the fixed pipe 41 of the discharge pipe fitting 4 corresponding to the material layer located at the bottom is installed through its corresponding casing 5.

[0077] The telescopic tube 42 further includes a floating portion 423 .

[0078] The floating portion 423 is movably mounted on the outside of the connecting portion 421, with its movement direction being vertical, and its density being less than that of the material layer at the top. An indicator rod 4231 extends vertically upward from the top of the floating portion 423. This rod 4231 penetrates the top of the shell 1 and engages with the shell 1. A scale is marked on the surface of the rod 4231. During the movement of the floating portion 423 relative to the connecting portion 421, the end of the connecting portion 421 away from the telescopic portion 422 is located at the inlet of the discharge pipe, and a portion of the rod 4231 is located above the shell 1. This scale allows personnel to determine the liquid level of the material in the corresponding casing 5 and the liquid level of the liquid mixture in the stratification space 11 after static stratification.

[0079] The implementation principle of a processing device in the embodiment of the present application is as follows: When the three discharge pipes 4 are used to respectively discharge different layers of substances obtained after the liquid mixture is allowed to stand and stratify, it is convenient for the staff to observe the stratification of the liquid mixture in the stratification space 11 and the liquid levels of the corresponding substances in the two casings 5 ​​through the observation window 9, so that the staff can use the adjustment component 43 to adjust the three discharge pipes 4 according to the observed situation, so that the height position of the inlet end of the three discharge pipes 4 can stably discharge the corresponding substances; When the staff's observation effect through the observation window 9 is not good, the staff can also know the liquid level conditions of the corresponding substances in the two casings 5 ​​and the liquid level conditions of the liquid mixture after static stratification in the stratification space 11 according to the scales on the three indicator rods 4231 corresponding to the three discharge pipes 4, and use the adjustment component 43 to adjust the three discharge pipes 4 accordingly, so that the height position of the inlet ends of the three discharge pipes 4 can stably discharge the corresponding substances.

[0080] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A process for treating industrial halogen waste gas, characterized in that: The following steps are involved: S1, alkali washing followed by water washing and secondary spray washing; S2, cooling treatment after filtration; S3, resin adsorption tank (104) adsorption; S4, saturated steam (105) is input into the resin adsorption tank (104); S5, condenser (106) condensation; S6. After gas-liquid separation and oil-water separation, they are discharged and stored separately.

2. The process for treating industrial halogen waste gas according to claim 1, wherein: In S5 , the gas-liquid mixture after desorption is subjected to secondary condensation, and the gas-liquid mixture is pressurized after the primary condensation.

3. The process for treating industrial halogen waste gas according to claim 1, wherein: In S4, an analog regulating valve (109) is provided on the main pipe for inputting saturated steam (105) to control the input flow rate of saturated steam (105) according to the requirements of different stages of the desorption process.

4. A treatment device, used in an industrial halogen waste gas treatment process as described in any one of claims 1 to 3, and used in S6, characterized in that: It comprises a shell (1), a feed pipe (2), an exhaust pipe (3), three discharge pipes (4) and two casings (5); The interior of the shell (1) comprises a buffer space (14) and a stratification space (11) for the gas-liquid mixture obtained by the desorption stage of the purification treatment of the halogen waste gas (101) to be allowed to stand and stratify. The buffer space (14) and the stratification space (11) are separated by a partition (6), and the bottom of the partition (6) allows the buffer space (14) and the stratification space (11) to communicate with each other. After the mixture is allowed to stand, it is divided into three layers, the middle layer is water, the upper layer is a solvent layer with a specific gravity of less than 1, and the lower layer is a solvent layer with a specific gravity greater than 1. The feed pipe (2) is arranged on one side of the shell (1), and one end of the feed pipe (2) is communicated with the top of the buffer space (14); the exhaust pipe (3) is arranged on the top of the shell (1), and one end of the exhaust pipe (3) is communicated with the top of the stratification space (11). The three discharge pipes (4) are all arranged on a side of the shell (1) away from the feed pipe (2), and one end thereof is in communication with the stratified space (11); the positions where the three discharge pipes (4) are in communication with the stratified space (11) are spaced apart in the vertical direction, and the three discharge pipes (4) are respectively used to discharge three different layers of substances in the mixture; The casing (5) is vertically arranged in the shell (1) and is located in the stratified space (11) near the discharge pipe (4), with its top located above the liquid surface of the mixture and its bottom immersed in the mixture; the two casings (5) respectively correspond to the two discharge pipes (4) for discharging the two layers of material at the bottom of the mixture, the bottom of the casing (5) is immersed in the bottom of the corresponding material layer, and the end of the discharge pipe (4) communicating with the stratified space (11) is communicated with the internal space of the corresponding casing (5).

5. A processing device according to claim 4, characterized in that: The discharge pipe (4) includes a fixed pipe (41), a telescopic pipe (42) and an adjustment component (43); The fixed tube (41) is fixedly connected to the housing (1); the telescopic tube (42) is movably connected to the fixed tube (41) in the vertical direction, and maintains communication with the fixed tube (41) during its movement, and its end away from the fixed tube (41) is located in its corresponding material layer; the adjustment component (43) is provided on the housing (1) and is used to drive the corresponding telescopic tube (42) to move; The telescopic tube (42) includes a connecting portion (421) and a telescopic portion (422), and the adjustment assembly (43) includes a threaded rod (431); the two ends of the telescopic portion (422) are respectively connected to the connecting portion (421) and the fixed tube (41); the threaded rod (431) is vertically arranged and engaged with the top thread of the housing (1); the bottom of the threaded rod (431) is rotatably connected to the connecting portion (421), and the rotation axis of the threaded rod (431) coincides with the axis of its own thread.

6. A processing device according to claim 5, characterized in that: It also includes two transparent observation windows (9); windows (13) for installing the observation windows (9) are provided on both sides of the shell (1); the observation windows (9) cover the parts of the three discharge pipes (4) located in the layered space (11) and the two protective tubes (5) along the observation direction, and the protective tubes (5) are transparent.

7. A processing device according to claim 6, characterized in that: The telescopic tube (42) further includes a floating portion (423); The floating portion (423) has a density lower than that of the uppermost material layer, is movably connected to the connecting portion (421) in the vertical direction, and has an indicator rod (4231) extending upward in the vertical direction; the indicator rod (4231) is fitted with the shell (1) and extends out of the top of the shell (1), and a scale for indicating the height of the liquid level inside the corresponding casing (5) is marked on the surface of the indicator rod (4231).

8. A processing device according to claim 4, characterized in that: Also includes a buffer plate (7); The buffer plate (7) is arranged on the upper part of the partition (6), and is located on the lower side of the partition (6) close to the outlet of the feed pipe (2) and is inclined downward in the direction close to the feed pipe (2); the position where the buffer plate (7) and the feed pipe (2) communicate with the buffer space (14) are all located above the mixture, and the end of the feed pipe (2) communicating with the buffer space (14) faces the buffer plate (7).

9. A processing device according to claim 8, characterized in that: Also included are a plurality of guide plates (8); The guide plate (8) is vertically arranged in the stratified space (11) and is located on the side of the partition (6) facing away from the feed pipe (2), and the position where the exhaust pipe (3) communicates with the stratified space (11) is also located on the side of the partition (6) facing away from the feed pipe (2); There is a distance between the bottom of the guide plate (8) and the inner wall of the bottom of the stratified space (11), and there is also a distance between one side of the guide plate and the inner wall of one side of the stratified space (11); a plurality of the guide plates (8) are distributed at equal intervals in the stratified space (11), and the plurality of the guide plates (8) together form a serpentine trajectory in the stratified space (11) to guide the flow of the mixture.

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