Organic matter tail gas recovery treatment device

Abstract

The utility model discloses an organic matter tail gas recovery treatment device, a tail gas pretreatment system comprises a spray tower, the spray tower removes macromolecular substances, mechanical impurities and heavy oil of tail gas, neutralizes and absorbs acidic components, the spray tower reduces partial temperature by spraying absorption liquid, a plurality of adsorbers are connected in parallel, and the adsorbers are connected in parallel. Primary chambers of the adsorbers are communicated with a gas outlet of the tail gas pretreatment system, interlayers of the adsorbers are filled with adsorbents, the interlayers are suitable for introducing a desorption medium, the plurality of adsorbers orderly and alternately perform adsorption work and desorption work, auxiliary chambers are suitable for discharging purified gas to the atmosphere, and the collection system collects an organic solution settled by the interlayers. Compared with the prior art, the recycling rate of tail gas materials reaches 95% or above, the materials recycled from the tail gas can be reused for production, the production cost is reduced, and emission is reduced. The air pressure and temperature detection piece, the air pump / regulating valve and the like are connected, regulated and controlled by the central controller, automatic control is achieved, operation is simple, and unattended operation can be achieved.

Description

Technical Field

[0001] The utility model relates to organic tail gas treatment, in particular to an organic tail gas recovery and treatment device. Background Art

[0002] During the production process of 2-alkylanthraquinone, tail gas containing volatile organic compounds is generated. If it is not treated and directly discharged, it will have a great impact on the environment and human health and cause a huge waste of resources.

[0003] Economical and effective tail gas recovery and recycling is beneficial to reducing production costs and generating economic benefits on the one hand, and reducing environmental pollution on the other hand, which is an important part of clean production for enterprises. It is necessary to upgrade environmental protection equipment for volatile organic tail gas, recover the usable components in the tail gas, reduce the cost of tail gas treatment, and achieve the dual goals of recovery and energy conservation and emission reduction. Utility Model Content

[0004] The utility model aims to solve at least one of the above-mentioned technical problems and provides an organic tail gas recovery and treatment device, which can recover and eliminate organic gas molecules in the tail gas, reduce the pollution of the tail gas to the air, save resources and reduce the cost of tail gas treatment.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An organic tail gas recovery and treatment device comprises a tail gas pretreatment system, an adsorption separation system and a collection system. The tail gas pretreatment system comprises a spray tower, which is suitable for removing macromolecular substances, mechanical impurities and heavy oil in the tail gas to reduce the tail gas concentration and is also suitable for neutralizing and absorbing acidic components in the tail gas. The spray tower sprays an absorption liquid to reduce the temperature of part of the tail gas. The adsorption separation system comprises a plurality of parallel adsorbers (i.e., at least two adsorbers), the adsorbers are provided with a partition, and a primary chamber and a secondary chamber separated by the partition, the primary chamber is suitable for connecting to the gas outlet of the tail gas pretreatment system, the partition is filled with an adsorbent, the partition is suitable for passing a desorption medium, the plurality of adsorbers are suitable for orderly alternating adsorption and desorption operations, the secondary chamber is suitable for discharging purified gas to the atmosphere, and the collection system is suitable for collecting organic solutions and / or organic vapor flows settled by the partition.

[0007] Compared with the prior art, the beneficial effects of the present application include: deacidification of tail gas, reduction of temperature and concentration, and subsequent adsorption separation, the tail gas material recovery rate reaches more than 95%, the materials recovered from the tail gas can be reused in production, reducing production costs, and exhaust gas is cleaner; reducing emissions, energy consumption and operating and maintenance costs.

[0008] As an improvement of the above technical solution, the exhaust gas pretreatment system further includes a surface cooler, and the spray tower and the surface cooler are cooperatively connected in sequence.

[0009] As an improvement of the above technical solution, the exhaust gas pretreatment system is connected to the adsorption separation system via an air pump, and the exhaust gas pretreatment system includes an air pressure detector, and the air pressure value of the air pressure detector is suitable for regulating the start and stop and / or speed of the air pump.

[0010] As an improvement of the above technical solution, at least three adsorbers are provided, and the primary chambers of the at least three adsorbers are connected to the exhaust gas pretreatment system through corresponding first opening and closing valves, respectively, the first opening and closing valves are electrically connected to the central controller, and the at least three adsorbers are connected in series, and the central controller is suitable for regulating the start-up order and start-up duration of the multiple first opening and closing valves; the secondary chambers of the at least three adsorbers are connected to the desorption medium supply system through corresponding second opening and closing valves, respectively, the second opening and closing valves are electrically connected to the central controller, and the central controller is suitable for regulating the start-up order and start-up duration of the multiple second opening and closing valves.

[0011] As an improvement of the above technical solution, the interlayer is filled with granular activated carbon, and the desorption medium supply system is suitable for passing saturated water vapor into the interlayer.

[0012] As an improvement of the above technical solution, the desorption medium supply system supplies saturated steam through a flow meter and a membrane regulating valve, and the membrane regulating valve is suitable for adjusting the opening according to the increase or decrease of the detection value of the flow meter.

[0013] As an improvement of the above technical solution, the collection system includes a first condenser and a liquid collecting and phase separation tank. The liquid collecting and phase separation tank is connected to the adsorber through the first condenser. The first condenser is suitable for cooling the organic solution and / or organic vapor flow discharged from the adsorber.

[0014] As an improvement of the above technical solution, it also includes a cooling regeneration system, which includes a cooling fan and a second condenser. The primary chamber of the adsorber is connected to the air inlet of the second condenser, and the air outlet of the second condenser is connected to the secondary chamber of the adsorber through the cooling fan, so that the adsorber, the second condenser and the cooling fan are confined in a closed loop, and the air inlet of the cooling fan is connected to the nitrogen supply equipment.

[0015] As an improvement of the above technical solution, it also includes a distillation recovery system, which is suitable for distilling the organic concentrated liquid obtained by standing the collection system and classifying and recovering the organic concentrated liquid.

[0016] As an improvement of the above technical solution, the distillation recovery system includes a plurality of distillation units connected in series, the distillation units including a bottom reboiler, a distillation tower, a top condenser, and a material receiving tank. The distillation tower is suitable for connecting to the organic solution through the bottom reboiler, the bottom reboiler of the first-stage distillation unit is suitable for connecting to the organic solution of the collection system, the bottom of the distillation tower of the upper-stage distillation unit is suitable for transporting the remaining organic solution to the bottom reboiler of the lower-stage distillation unit, and the top condenser is suitable for condensing the distillation product of the distillation tower to the material receiving tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a flow chart of one section of the organic tail gas recovery and treatment device of the utility model embodiment;

[0019] Figure 2 for Figure 1 A schematic diagram of the exhaust gas pretreatment system structure showing a flow chart;

[0020] Figure 3 for Figure 1 A schematic diagram of the adsorption separation system structure showing a flow chart;

[0021] Figure 4 for Figure 1 A schematic diagram of the desorption system structure showing a flow chart;

[0022] Figure 5 for Figure 1 A schematic diagram of the collection system structure showing a flow chart;

[0023] Figure 6 for Figure 1 A schematic diagram of the cooling and regeneration system structure showing a flow chart;

[0024] Figure 7 for Figure 1 A schematic diagram of the emergency system structure showing a flow chart;

[0025] Figure 8 This is a flow chart of another section of the organic tail gas recovery and treatment device according to an embodiment of the utility model;

[0026] Fig. 9 It is a schematic diagram of the structure of the adsorber according to an embodiment of the utility model.

[0027] The accompanying drawings are only one specific embodiment of the present invention, and the form and structure of this specific embodiment should not limit the expansion of other embodiments.

[0028] Tail gas pretreatment system 100, spray tower 110, surface cooler 120, tail gas flame arrester 130, air pump 140, air pressure detector 150;

[0029] Adsorption separation system 200, adsorber 210, primary chamber 211, partition 212, secondary chamber 213, liquid collecting tank 214, first on-off valve 220, second on-off valve 230;

[0030] Collection system 300, first condenser 310, liquid collection phase separation tank 320, liquid level sensor 321;

[0031] Distillation recovery system 400, tower bottom reboiler 410, distillation tower 420, tower top condenser 430, material receiving tank 440;

[0032] Flow meter 510, membrane regulating valve 520, pressure regulating valve 530;

[0033] Cooling and regeneration system 600 , cooling fan 610 , and second condenser 620 . DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Reference Figures 1 to 5 The utility model provides an organic tail gas recovery and treatment device, including a tail gas pretreatment system 100, an adsorption separation system 200 and a collection system 300. The tail gas pretreatment system 100 includes a spray tower 110. The spray tower 110 is suitable for removing macromolecular substances, mechanical impurities and heavy oil in the tail gas to reduce the tail gas concentration, and is also suitable for neutralizing and absorbing acidic components in the tail gas. The spray tower 110 sprays an absorption liquid to reduce the temperature of part of the tail gas. The adsorption separation system 200 includes a plurality of parallel adsorbers 210 (i.e., up to At least two adsorbers 210), the adsorber 210 is provided with a partition 212, and a primary chamber 211 and a secondary chamber 213 separated by the partition 212, the primary chamber 211 is suitable for connecting to the gas outlet of the exhaust gas pretreatment system 100, the partition 212 is filled with adsorbent, the partition 212 is suitable for passing desorption medium, the multiple adsorbers 210 are suitable for orderly alternating adsorption and desorption work, the secondary chamber 213 is suitable for discharging purified gas into the atmosphere, and the collection system 300 is suitable for collecting the organic solution and / or organic vapor flow settled by the partition 212.

[0036] In the present invention, the spray tower 110 can spray alkaline absorption liquid to neutralize and absorb the acidic components in the tail gas and eliminate the acidic hazards of the tail gas; the alkaline absorption liquid simultaneously dissolves part of the water-soluble components and is suitable for sedimentation and removal of macromolecular substances and mechanical impurities in the tail gas.

[0037] The initial chamber 211 of the adsorber 210 is connected to the gas outlet of the exhaust gas pretreatment system 100, so it can be understood that when the spray tower 110, the surface cooler 120 or the exhaust gas flame arrester 130 is used as the terminal link of the exhaust gas pretreatment system 100, the initial chamber 211 is connected to the gas outlet of the terminal link.

[0038] There are unbalanced and unsaturated molecular attractions or chemical bonds on the solid surface of the adsorbent. When this solid surface comes into contact with the tail gas, it can attract the organic gas molecules in the tail gas, causing them to concentrate and remain on the solid surface. In the utility model, the tail gas is first reduced in concentration (removing macromolecular substances, mechanical impurities, heavy oil, and some water-soluble components), and the acid is removed and the temperature is lowered, so that the adsorbent can more specifically and effectively adsorb the organic gas molecules in the tail gas, so that the tail gas is fully purified. In some embodiments, the adsorbent is activated carbon, activated carbon fiber, silica gel, molecular sieve, etc., so that the tail gas is fully in contact with the porous adsorbent with a large surface, and the organic gas molecules in the tail gas are adsorbed on the surface of the adsorbent; that is, the tail gas after the acid is removed and the temperature is lowered is separated into organic gas molecules and purified gas.

[0039] It can be understood that the collection system 300 includes a liquid collection and phase separation tank 320 , and the liquid collection and phase separation tank 320 is suitable for collecting the organic solution and / or organic gas flow discharged from the primary chamber 211 .

[0040] Reference Figures 1 to 5 The invention discloses a process for recovering and treating volatile organic compound tail gas in the production of 2-alkylanthraquinone, comprising a tail gas pretreatment step, a tail gas adsorption separation step, and a desorption collection step.

[0041] Reference Figure 1 and Figure 2 , tail gas pretreatment, spray tower 110 sprays absorption liquid rain mist to suit the tail gas flow, so that the macromolecular substances, mechanical impurities and heavy oil in the tail gas are settled, and the acidic components in the tail gas are neutralized and separated. The spray tower 110 reduces the temperature of the tail gas part by spraying. The tail gas first undergoes deacidification and concentration temperature reduction to facilitate the stable operation of the adsorbent and extend the service life of the adsorbent. On the other hand, it is conducive to the accurate and effective separation of organic gas molecules by the adsorbent.

[0042] Reference Figure 1 and Figure 3The tail gas is adsorbed and separated. The tail gas after deacidification and temperature concentration reduction passes through the adsorbent of the partition 212 of the adsorber 210. The tail gas after deacidification and temperature concentration reduction is separated into organic gas molecules and purified gas. The organic gas molecules are attached to the outer surface and / or pores of the absorbent, and the purified gas passing through the adsorbent of the partition 212 is suitable for discharge.

[0043] The absorption bed is provided with a plurality of absorbers, and the plurality of absorbers perform adsorption and desorption work alternately in an orderly manner. In some embodiments, the absorption bed is provided with only two absorbers, and when one absorber performs adsorption work, the other absorber performs desorption work. In some embodiments described below, the absorption bed is provided with at least three absorbers, and the absorption bed can perform a working mode of "multiple absorbers adsorb in series, at least one absorber desorbs". For example, at the beginning of operation, absorber A and absorber B are started to run in series for adsorption, and after a certain period of time (the specific time is determined during debugging), absorber A is started to desorb, and absorber B and absorber C are started to run in series for adsorption, and so on, and the desorption time is adjusted according to the emission peak.

[0044] Reference Figure 1 , Figure 4 and Figure 5 , desorption collection, the desorption medium passes into the partition 212, the desorption medium fills the gaps between the adsorbents and the pores of the adsorbents, the organic gas molecules condense with the desorption medium to form an organic solution, the organic solution settles in the initial chamber 211 of the adsorber 210, and converges to the collection system 300. Figure 1 and Figure 4 The desorption medium is suitable for flowing through the auxiliary chamber and then flowing into the partition 212 .

[0045] Reference Figure 1 and Figure 7 In some embodiments of the utility model, a distillation recovery system 400 is also included. The organic tail gas recovery treatment process also includes a distillation recovery step. The collection system 300 includes a liquid collection and phase separation tank 320. The distillation recovery system 400 is suitable for classifying and recovering the organic concentrated liquid (the actual organic solution described below) obtained by the distillation collection system 300.

[0046] Compared with the prior art, the beneficial effects of the present application include: deacidification of tail gas, reduction of temperature and concentration, and subsequent adsorption separation, the tail gas material recovery rate reaches more than 95%, the materials recovered from the tail gas can be reused in production, reducing production costs, and exhaust gas is cleaner; reducing emissions, energy consumption and operating and maintenance costs.

[0047] The spraying of the tail gas by the spray tower 110 can reduce the temperature of the tail gas to a certain extent, prevent the adsorbent from working at a high temperature, facilitate the absorbent to work in a stable state, facilitate the adsorption and separation of the tail gas, and also extend the service life of the adsorbent material. Figure 1 and Figure 2Furthermore, the exhaust gas pretreatment system 100 also includes a surface cooler 120, and the spray tower 110 and the surface cooler 120 are connected in sequence. The spray tower 110 and the surface cooler 120 cooperate with each other. While the spray tower 110 removes acid and reduces concentration, it also performs preliminary cooling for the surface cooler 120, and multi-effect work saves energy consumption in an intensive manner; the surface cooler 120 further cools the exhaust gas, and simultaneously condenses the exhaust gas that has been sprayed and moistened, condensing the moisture in the exhaust gas in an intensive and effective manner, so that the adsorbent acts on the relatively dry exhaust gas, avoiding the adsorbent from working in a humid environment, facilitating exhaust gas adsorption and separation, and also extending the service life of the adsorbent material; in addition, the influence of exhaust gas humidity on saturated steam is reduced, so that the saturated steam effectively cooperates with the granular activated carbon and organic gas molecules, and the organic gas molecules effectively combine with the saturated steam and separate from the activated carbon; the spray tower 110 and the surface cooler 120 cooperate and are connected in series in sequence, and the spray tower 110 and the surface cooler 120 both solve multiple technical problems simultaneously.

[0048] It can be understood that the surface cooler 120 and the condenser are both heat exchangers in essence; in the heat exchanger, the main and auxiliary channels are close to each other and flow different materials respectively, so that the two materials can exchange heat.

[0049] In some embodiments of the present invention, the exhaust gas pretreatment system 100 further includes an exhaust gas flame arrester 130, which is suitable for reducing the exhaust gas concentration. The exhaust gas flame arrester 130 is provided with several parts such as an air inlet, a reaction chamber, an air outlet, and a catalytic reaction medium. The reaction chamber is suitable for accommodating the catalytic reaction medium. The catalytic reaction medium of the exhaust gas flame arrester 130 promotes the oxidation-reduction reaction of some components of the exhaust gas, such as the oxidation-reduction of nitrogen oxides, chlorides, and sulfides, and the harmful gases, particulate matter, etc. in the exhaust gas are converted and reduced through the oxidation-reduction reaction.

[0050] Reference Figure 1 and Figure 2 In some embodiments of the present utility model, the exhaust gas pretreatment system 100 is connected to the adsorption separation system 200 through the air pump 140, and the exhaust gas pretreatment system 100 includes an air pressure detector 150, and the air pressure value of the air pressure detector 150 is suitable for regulating the start and stop and / or speed of the air pump 140; the air pump 140 is suitable for stopping based on the low value of the workshop exhaust gas detected by the air pressure detector 150, and is also suitable for linearly speeding up based on the high value of the workshop exhaust gas detected by the air pressure detector 150, to ensure that the workshop exhaust gas is not extracted too much and will not cause the workshop to be pressurized. The air pressure detector 150 can be an air pressure sensor, a barometer, etc., such as a micro pressure gauge. The air pump 140 can be a variable frequency type (that is, the air pump 140 includes a variable frequency motor), the air pump 140 is electrically connected to the central controller through the frequency converter / variable frequency driver, and the air pressure detector 150 is electrically connected to the central controller.

[0051] Compared with the prior art, the beneficial effects of the present application include: the air pressure and temperature detection components, and the air pump 140 / general regulating valve, etc. are connected and regulated by a central controller, with automatic control, simple operation, and unattended operation; the device adopts automatic control to ensure the safe operation of the device, so as to fully consider the particularity of organic matter.

[0052] Reference Fig. 9 In some embodiments of the present invention, a liquid collecting tank 214 is formed at the inner bottom of the adsorber 210 to facilitate the sedimentation and collection of the organic solution to the tank. A liquid discharge port is provided at the inner bottom of the adsorber 210, and the air inlet of the adsorber 210 is higher than its inner bottom.

[0053] Reference Figure 1 , Figure 3 and Figure 4 In some embodiments of the present utility model, at least three adsorbers 210 are provided, and the primary chambers 211 of the at least three adsorbers 210 are connected to the exhaust gas pretreatment system 100 through the corresponding first opening and closing valves 220, the first opening and closing valves 220 are electrically connected to the central controller, and the at least three adsorbers 210 are connected in series, and the central controller is suitable for regulating the start-up sequence and start-up duration of the plurality of first opening and closing valves 220; the secondary chambers 213 of the at least three adsorbers 210 are connected to the desorption medium supply system through the corresponding second opening and closing valves 230, the second opening and closing valves 230 are electrically connected to the central controller, and the central controller is suitable for regulating the start-up sequence and start-up duration of the plurality of second opening and closing valves 230. For the at least three adsorbers 210 connected in series, it can be understood that the secondary chamber 213 of one adsorber 210 is connected to the primary chamber 211 of the next adsorber 210, so that the plurality of adsorbers 210 are connected in series to form a ring. In the present utility model, organic gas molecules in the exhaust gas can be effectively and fully adsorbed and removed; in addition, the technical problems solved simultaneously include that at least three adsorbers 210 are provided; when one adsorber 210 is emergency treated and / or maintained, other adsorbers 210 can also orderly distribute adsorption and desorption work. The adsorber 210 of the present utility model is a fixed adsorption (i.e., the adsorbent is accumulated as a partition 212, and the adsorbent is not flowing), and the partition 212 can be a rotating type or a fixed type; a plurality of adsorbers 210 form an adsorption bed, and when one adsorber 210 performs desorption, other adsorbers 210 can perform adsorption separation. The opening and closing valve and the regulating valve can be solenoid valves, and the electromagnet of the solenoid valve can be directly electrically connected to the central controller; it can be understood that the opening and closing valve is integrated with a cylinder, and the solenoid valve corresponding to the cylinder is electrically connected to the central controller. Generally, the central control room is arranged in the control room, and the central controller can be a PC (personal computer), a PLC controller / DSP controller with a display screen, etc.

[0054] Reference Figure 1 , Figure 3 and Figure 4In some embodiments of the utility model, the interlayer 212 is filled with granular activated carbon, and the desorption medium supply system is suitable for passing saturated water vapor into the interlayer 212, that is, saturated water vapor is used as the desorption medium. Compared with silica gel, metal oxides, etc., activated carbon has no polarity. It coexists with water vapor. Activated carbon is not easy to combine with water molecules, so it is not easy to reduce the adsorption performance, thereby improving the ability to adsorb organic tail gas; on the other hand, even if the tail gas that has been deacidified and reduced in concentration and temperature carries a certain amount of moisture, activated carbon is not easy to combine with moisture, so it is not easy to reduce the adsorption performance.

[0055] Better, choose granular activated carbon with smooth, hard surface and high specific surface area (specific surface area ≥ 1000㎡ / g), that is, high-value modified activated carbon. High-value modified activated carbon: A. Excellent hydrophobicity, less affected by the humidity of the incoming gas; B. Combination of physical adsorption and chemical adsorption, more solid adsorption; C. Relatively uniform pore size and pore spacing, suitable for adsorption of high pore size ratio; D. Strength> 98%, pore wall is firm and not easy to collapse, long life cycle; E. Low breakage and pulverization rate during use, less carbon powder, good safety performance.

[0056] Saturated steam is steam at 100°C under atmospheric pressure, and the temperature no longer rises. It is steam in a saturated state, fully and effectively filling the gaps between the granular adsorbents in the interlayer 212 and filling the pores of the adsorbent; saturated steam is colorless, odorless, non-flammable and non-corrosive; saturated steam has little effect on the adsorbent, and after contacting the organic gas molecules on the outer surface and / or pores of the adsorbent, it can quickly condense with the organic gas molecules to form an organic solution, quickly and substantially separating the organic gas molecules in the tail gas. In the utility model, the high-value modified granular activated carbon adsorbent and the saturated steam work together efficiently to achieve ultra-low emissions.

[0057] Reference Figure 1 and Figure 4 In some embodiments of the present invention, the desorption medium supply system supplies saturated steam through the flow meter 510 and the film regulating valve 520. The film regulating valve 520 is suitable for adjusting the opening according to the rise and fall of the detection value of the flow meter 510. When one or more adsorbers 210 perform desorption, the film regulating valve 520 opening is automatically adjusted according to the flow fluctuation. The desorption medium supply system steadily supplies saturated steam, and the overall desorption process is carried out smoothly, so that the organic gas molecules are quickly and effectively separated. Further, the desorption medium supply system also includes a pressure regulating valve 530.

[0058] In some embodiments, the specific surface area of ​​the high-value modified granular activated carbon is 1100-1200 m2 / g, and the desorption process is set at a constant flow rate of saturated steam of 300±5 kg / h, which greatly improves the exhaust gas purification rate; after deacidification, cooling, humidity reduction and concentration reduction, the adsorption and desorption setting is executed, and the exhaust gas purification rate reaches more than 95%.

[0059] Reference Figure 1 and Figure 5 , the organic solution condensed by the saturated steam still has a certain temperature. In some embodiments of the utility model, the collection system 300 includes a first condenser 310 and a liquid collection phase separation tank 320. The liquid collection phase separation tank 320 is connected to the adsorber 210 through the first condenser 310. The first condenser 310 is suitable for cooling the organic solution and / or organic vapor flow discharged by the adsorber 210, reducing the diffusivity of the organic solution / organic vapor flow, so that the liquid collection phase separation tank 320 collects stable organic solution, which is convenient for the liquid collection phase separation tank 320 to quickly and fully separate higher concentration organic solution, effectively reducing the actual amount of organic solution to be processed, and reducing the difficulty of classified recovery of organic solution. Among them, the organic vapor flow is cooled and condensed into an organic solution.

[0060] Reference Figure 1 and Figure 5 Preferably, the refrigerant input port of the first condenser 310 is connected to the refrigerant supply device through a regulating valve, and the organic solution discharge port of the first condenser 310 is provided with a temperature sensor, and the regulating valve is suitable for adjusting the opening based on the detection value of the temperature sensor. Figure 1 and Figure 5 , the first condenser 310 can use water as the refrigerant.

[0061] Reference Figure 1 and Figure 5 The liquid collecting and phase separation tank 320 is suitable for separating the aqueous solution and the substantial organic solution / solvent into layers. Furthermore, the liquid collecting and phase separation tank 320 is provided with a liquid level sensor 321 suitable for detecting the substantial organic solution, and is also provided with a discharge pump connected to the substantial organic solution. The liquid level sensor 321 and the discharge pump are both electrically connected to the central controller, and the liquid level detection value of the liquid level sensor 321 is suitable for controlling the start and stop of the discharge pump.

[0062] Reference Figure 1 and Figure 6 In some embodiments of the utility model, a cooling regeneration system 600 is also included. The cooling regeneration system 600 includes a cooling fan 610 and a second condenser 620. The primary chamber 211 of the adsorber 210 is connected to the air inlet of the second condenser 620, and the air outlet of the second condenser 620 is connected to the secondary chamber 213 of the adsorber 210 through the cooling fan 610, so that the adsorber 210, the second condenser 620 and the cooling fan 610 are limited to a closed loop, and the air inlet of the cooling fan 610 (the air outlet of the second condenser 620) is connected to a nitrogen supply device, which can be a nitrogen bottle / tank / warehouse. If multiple adsorbers 210 are provided, the cooling regeneration system 600 includes multiple closed loops; the closed loop setting avoids the white plume formed by water vapor in the initial stage of cooling. The cooling regeneration process is an overall closed-loop cycle and nitrogen is supplemented, which is safer on the basis of eliminating white plumes, and achieves stable and standard exhaust emissions throughout the entire process.

[0063] Therefore, the volatile organic tail gas recovery and treatment process in the production of 2-alkylanthraquinone also includes a cooling and regeneration step. After desorption is completed, the closed-loop circulation cooling is performed under the action of the cooling fan 610 (see Figure 6 (showing the air pressure detection component at the output end of the cooling fan 610) When the closed-loop air pressure reaches a certain range, nitrogen is added in the closed loop to cool the adsorber 210, and the cooling process eliminates the white smoke plume.

[0064] Reference Figure 1 and Figure 7 In some embodiments of the utility model, an emergency system is also included. The sub-chamber 213 of each adsorber 210 is connected to the emergency water of the emergency system through a corresponding ball valve. The adsorber 210 is provided with one or more temperature detectors arranged along the airflow direction, and the ball valve is started and stopped based on the temperature detection value of the temperature detector. In the utility model, the adsorber 210 can be quickly treated in an emergency. The central controller, multiple first opening and closing valves 220, and multiple second opening and closing valves 230 work in coordination. When an adsorber 210 is subjected to emergency treatment, other adsorbers 210 can continuously allocate adsorption work and desorption work.

[0065] Reference Figure 8 In some embodiments of the present invention, the distillation recovery system 400 includes a plurality of distillation units connected in series, the distillation units include a bottom reboiler 410, a distillation tower 420, a top condenser 430, and a material receiving tank 440. The distillation tower 420 is suitable for accessing the organic solution through the bottom reboiler 410. The bottom reboiler 410 of the first-stage distillation unit is suitable for accessing the organic solution of the collection system 300. The bottom of the distillation tower 420 of the upper distillation unit is suitable for transferring the remaining organic solution to the bottom reboiler 410 of the lower distillation unit, and the top condenser 430 is suitable for condensing the distillation product of the distillation tower 420 to the material receiving tank 440. The plurality of distillation units are connected in series, and the organic solution obtained by the collection system 300 is gradually separated and purified; specifically, each distillation unit performs its own distillation conditions (medium, temperature, etc.), and each distillation unit distills the corresponding pure organic solution respectively, and the materials recovered from the tail gas are further distilled, classified, recovered, and reused for production.

[0066] Better yet, the tower bottom reboiler 410 is connected to the saturated steam supply equipment. The tower bottom reboiler 410 uses saturated steam for heating, so that the enterprise can use the saturated steam resource more uniformly. The saturated steam demand reaches a certain amount, which is conducive to ensuring the stable operation of the saturated steam supply equipment.

[0067] The above embodiments are only used to illustrate the technical solution of the utility model but not to limit it. Any modification or equivalent substitution that does not deviate from the spirit and scope of the utility model shall be included in the scope of the technical solution of the utility model.

Claims

1. An organic tail gas recovery and treatment device, characterized in that: include: The tail gas pretreatment system includes a spray tower, which is suitable for removing macromolecular substances, mechanical impurities and heavy oil in the tail gas to reduce the concentration of the tail gas, and is also suitable for neutralizing and absorbing acidic components in the tail gas. The spray tower sprays an absorption liquid to reduce the temperature of part of the tail gas; An adsorption separation system, comprising a plurality of adsorbers connected in parallel, wherein the adsorbers are provided with a partition, and a primary chamber and a secondary chamber separated by the partition, wherein the primary chamber is suitable for communicating with the gas outlet of the tail gas pretreatment system, the partition is filled with an adsorbent, the partition is suitable for passing a desorption medium, the plurality of adsorbers are suitable for orderly alternating adsorption and desorption operations, and the secondary chamber is suitable for discharging purified gas into the atmosphere; The collecting system is suitable for collecting the organic solution and / or organic gas flow settled in the barrier.

2. The organic tail gas recovery and treatment device according to claim 1, characterized in that: The tail gas pretreatment system also includes a surface cooler, and the spray tower and the surface cooler are cooperatively connected in sequence.

3. The organic tail gas recovery and treatment device according to claim 1, characterized in that: The exhaust gas pretreatment system is connected to the adsorption separation system via an air pump, and the exhaust gas pretreatment system includes an air pressure detector, and the air pressure value of the air pressure detector is suitable for regulating the start and stop and / or speed of the air pump.

4. The organic tail gas recovery and treatment device according to claim 1, characterized in that: There are at least three adsorbers, and the primary chambers of the at least three adsorbers are connected to the exhaust gas pretreatment system through corresponding first opening and closing valves, respectively. The first opening and closing valves are electrically connected to the central controller, and the at least three adsorbers are connected in series. The central controller is suitable for regulating the start-up sequence and start-up duration of the multiple first opening and closing valves; the secondary chambers of the at least three adsorbers are connected to the desorption medium supply system through corresponding second opening and closing valves, respectively. The second opening and closing valves are electrically connected to the central controller, and the central controller is suitable for regulating the start-up sequence and start-up duration of the multiple second opening and closing valves.

5. The organic tail gas recovery and treatment device according to any one of claims 1 to 4, characterized in that: The interlayer is filled with granular activated carbon, and the desorption medium supply system is suitable for passing saturated water vapor into the interlayer.

6. The organic tail gas recovery and treatment device according to claim 5, characterized in that: The desorption medium supply system supplies saturated steam through a flow meter and a membrane regulating valve, and the membrane regulating valve is suitable for adjusting the opening degree according to the rise and fall of the detection value of the flow meter.

7. The organic tail gas recovery and treatment device according to any one of claims 1 to 4, characterized in that: The collection system comprises a first condenser and a liquid collection phase separation tank. The liquid collection phase separation tank is connected to the adsorber via the first condenser. The first condenser is suitable for cooling the organic solution and / or organic vapor flow discharged from the adsorber.

8. The organic tail gas recovery and treatment device according to any one of claims 1 to 4, characterized in that: It also includes a cooling regeneration system, which includes a cooling fan and a second condenser. The primary chamber of the adsorber is connected to the air inlet of the second condenser, and the air outlet of the second condenser is connected to the secondary chamber of the adsorber through the cooling fan, so that the adsorber, the second condenser and the cooling fan are confined in a closed loop, and the air inlet of the cooling fan is connected to the nitrogen supply equipment.

9. The organic tail gas recovery and treatment device according to any one of claims 1 to 4, characterized in that: It also includes a distillation recovery system, which is suitable for distilling the organic concentrated liquid obtained by the collection system and classifying and recovering the organic concentrated liquid.

10. The organic tail gas recovery and treatment device according to claim 9, characterized in that: The distillation recovery system includes a plurality of distillation units connected in series, wherein the distillation units include a bottom reboiler, a distillation tower, a top condenser (430), and a material receiving tank. The distillation tower is suitable for connecting to an organic solution through the bottom reboiler. The bottom reboiler of the first-stage distillation unit is suitable for connecting to the organic solution of the collection system. The bottom of the distillation tower of the upper-stage distillation unit is suitable for conveying the remaining organic solution to the bottom reboiler of the lower-stage distillation unit. The top condenser is suitable for condensing the distillation product of the distillation tower to the material receiving tank.

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