TW503122B - Gas treatment method and apparatus - Google Patents

Abstract

This invention provides a gas treatment method and apparatus whereby a harmful gas can be treated almost without the necessity for motive power and the treatment efficiency can be enhanced while the use of a treatment liquid is kept minimum. A gas to be treated is caused to pass through permeable block- shaped porous bodies containing a gas absorption liquid or reaction liquid. Air passages may be set up in the block-shaped porous bodies themselves, and the porous bodies having affinity for the gas absorption liquid or reaction liquid are used. A new gas absorption liquid or reaction liquid is supplied to the porous bodies from the exhaust side of the gas to be treated, and the used gas absorption liquid or reaction liquid is discharged from the gas introduction side.

Description

503122 A7 B7 V. Description of the invention () The technical field of the invention The invention relates to the technology for processing desired gas, especially for the absorption or decomposition of harmful gases discharged during processing, for example, by a liquid having a dissolving or decomposing effect. , Absorption and treatment gas processing method and gas processing device

C. Prior technology has always been. In order to dissolve the desired gas in the treatment liquid, or to react with the liquid to dissolve, etc., plugs such as a cylindrical filling container called a Raschig ring are often used. A scrubber that spreads the processing liquid from its upper part and introduces the processed gas from the lower part. Alternatively, it is also known as the foaming method. A porous material such as a gas diffuser is inserted into a tank containing a processing solution, and a gas is pumped by a pump or the like. The porous material is decomposed into bubbles and passed through the liquid area to absorb the gas. Method, etc. There is also a device in the market that sucks gas quickly by pumping liquid and stirs it vigorously. This device is called an ejector (jet scrubber). It uses a device such as a pump to force the agitator. All such methods and devices have their own advantages and disadvantages, and the appropriate one is adopted according to the processing conditions for achieving the purpose. Questions to be Solved by the Invention And such prior art is inevitably the same as the following. First of all, in the case of using a filling tower and an ejector, a large amount of liquid is dispersed or fed by a pump, so great power is required. In addition, the paper rule is applicable in the case of using a filling tower and a diffuser. National standard (CMS> A4 size (210X29 * 7mm) (Please read the precautions on the back before filling this page) Consumption cooperation between employees of the Ministry of Intellectual Property Bureau, Sugiuchi -4- 122122 Printed by the Consumer Consumption Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, A7 In the case of stirring, the power for stirring is needed. Moreover, any of the foregoing prior arts has a problem of waste of treatment liquid. For example, in the case of filling the tower, the liquid dispersed in the tower falls at a certain speed. For replenishment, new liquid must be constantly given. In addition, in the case of ejectors, in order to ensure a certain amount of suction capacity, a large amount of liquid must be fed in. In order to save the treatment liquid, there is also a method to circulate the liquid. The absorbed gas generally causes re-evaporation as the concentration in the liquid rises, and as a result, there is a risk that the treatment efficiency will decrease. In addition, the method of using a diffuser can certainly reduce the supply of liquid The amount is reduced and the waste is reduced. However, as in the case of the foregoing cycle, there is a problem that the treatment efficiency is reduced due to re-evaporation. Of course, it is possible to reduce the treatment efficiency by reducing the re-evaporation by, for example, making the tank into two or more stages. In view of the above problems, an object of the present invention is to provide a method for processing harmful liquids emitted from processing and the like without requiring power. 5 A gas processing method and a gas processing device which minimize the use and improve the processing efficiency. Means for solving the problem by using a clamp In order to achieve the aforementioned object, according to the present invention, a gas processing method is provided, which is characterized in that a gas to be processed is passed through Impregnated with gas absorbing liquid or the size of this paper applies the Chinese National Standard (CNS) Α4 grid (2 丨 0X297) 论 R theory (Please read the precautions on the back before filling this page) -f 503122 \ | 3 Printed by A7 B7, Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (Reaction liquid and air-permeable block porous body As described above, if a treatment liquid such as a gas absorbing solution or a reaction solution is used and a porous porous body having air permeability such as sponge, the power to be processed can be passed through the porous body with almost no power, and the absorption can be performed efficiently. Or decomposing harmful components in the processed gas passing through the porous body. According to the present invention, there is also provided a gas processing method, characterized in that the processed gas is self-filled with a plurality of impregnated gas absorbing liquids or reaction liquids and One of the containers of the porous porous body having air permeability passes through and flows to the other opening. If a plurality of the above porous porous bodies having air permeability is filled in a container such as a filling tower, the gas can be borrowed more easily. Weak wind is passed between the porous bodies, and almost no power is required. It is possible to provide a ventilation path in the aforementioned massive porous body itself. By providing a through hole or the like in the massive porous body itself, and providing a ventilation path, the ventilation resistance can be reduced, and gas processing can be performed more efficiently. For a more appropriate method, it is preferable that a new liquid of the gas absorption liquid or reaction liquid is supplied to the bulk porous body from the exhaust side of the gas to be processed, and the processed liquid sheet is discharged from the gas introduction side. If the new processing liquid is supplied to the porous body in the direction opposite to the gas to be processed in this way, the new processing liquid can slowly move in the porous body while dissolving the high-concentration gas in the absorbed gas and the discharged liquid. Therefore, it is very effective and can be used for continuous gas treatment with the minimum amount of liquid necessary. Also, preferably, it has affinity for the absorbent or reaction liquid used. This paper is standard in use ® National Standard YcNS) A4 Specification (2 ] 0X 297 mm) (Please read the notes on the back before filling in this page)

-6-503122 Α7 Β7] 4 V. Description of the invention (as the aforementioned bulk porous body. Please read the precautions on the back before filling out this page} If using a bulk porous body that has affinity for the treatment solution, The treatment liquid can be kept in the porous body after fully absorbing the gas, and can be effectively processed with a small amount of the treatment liquid. Further according to the present invention, a gas processing device for implementing the aforementioned gas processing method is provided. That is, according to The present invention provides a gas processing device, which is filled with a filling material in the device, supplies a gas absorption liquid or a reaction liquid to the filling material, and passes the processed gas introduced from the gas introduction port through the filling material. After that, the person who discharges from the exhaust gas discharge port is characterized in that the filling material is impregnated with a gas absorption liquid or a reaction liquid, and is a block-shaped porous body having air permeability. Preferably, the block-shaped porous body itself A ventilation path is provided, and the aforesaid massive porous system has an affinity for the gas absorption liquid or reaction liquid used. If such a gas processing device is used, it is possible A small amount of treatment liquid is used for high-efficiency gas treatment. The implementation form of the printing by the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is described in detail below with reference to the drawings, but the present invention is not limited to this. Reference numeral 1 is a diagram for explaining the idea of the present invention. The porous body 1 can be impregnated with an absorption liquid or a reaction liquid (treatment liquid), and if it has air permeability, it is not particularly limited. Good affinity, high maintainability, high performance, and maintain the state of the processing liquid without applying special coercive force, etc. The standard of this paper is applicable to China National Standards (CNS) A4 (2 丨 0X29 * 7 mm) 503122 A7 __ Β7_

V. Description of the invention (A is preferred. For example, porous aluminum and activated carbon can be used. In particular, sponge is preferred based on various points of water absorption and air permeability. In terms of material, polyethylene, poly Hydrophilic sponges made of vinyl alcohol, vinyl chloride, etc. are particularly advantageous. 0 For the gas treatment method using the above-mentioned porous body, for example, the sponge is saturated with water and other processing liquid to impregnate the porous body of the processing liquid. The surface is used as the gas-liquid contact surface to pass through the gas to be processed. At this time, the porous body impregnated with the processing liquid is used to ensure gas-liquid contact. In the state of increased volume, the porous body is easy to pass because it has air permeability. Processed gas. Although the method of containing the processing liquid in the porous body is not particularly limited, the porous body may be immersed in the processing liquid, or the processing liquid may be poured on the porous body. The porous body may be impregnated with the processing liquid. This liquid-containing state can also be absorption, adsorption, adhesion, penetration, etc. Since the treatment liquid fully penetrates the porous body, the gas-liquid interface is like a porous body with a pore distribution, which is complicated and messy. The state in which the bubbles are dispersed in the liquid is the same. Therefore, according to the gas processing method of the present invention, it is almost unnecessary to send the power of the gas to be processed and the processing liquid, and as long as the necessary amount of the processing liquid is supplied, a high-efficiency gas-liquid can be performed. Contact treatment. Moreover, the treatment liquid of the gas absorption liquid and the reaction liquid can be appropriately selected according to the type, physical properties, and reactivity of the gas to be treated, and water-alkaline water can be appropriately used. Since the present invention uses a block porous material having good air permeability Therefore, it is not necessary to use a special power such as a blower to discharge the gas to be processed during processing. Even if it is a weak wind, it can also pass through the porous body. However, in order to reduce the ventilation resistance, it can be shown in Figure 2, In the porous body 1 'itself, set the appropriate paper size for this paper. National Standard (CMS) A4 Washing (210X297 mm) (谙 Please read the precautions on the back before filling this page) Order the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by Employee Consumption Cooperative 503122 A7.; ______ B7 V. Invention Description (4 Ventilation Path 2. In this case, if the aperture of Ventilation Path 2 is too large. Ventilation Path 2 Too many numbers may cause insufficient gas-liquid contact, and the absorption rate of the treated gas may decrease. However, if the size and number of the ventilation path 2 is appropriately selected, the processed gas is processed between the inlet and the outlet of the ventilation path 2. At the same time, it is stirred, so there is no problem. As for the method of reducing the ventilation resistance, in addition to setting the ventilation path in the porous body itself as described above, it is possible to improve the air permeability by filling a plurality of porous bodies. Specifically, a plurality of porous bodies of a moderate size impregnated with a gas absorption liquid or a reaction liquid and having air permeability can be filled into a container such as a cylinder or a tower, so that the gas to be processed can be removed from the container. One opening leads to the other—opening. If it is intermittent, short-term gas treatment, as described above, the gas to be treated can be passed through a porous porous body of a moderate size that is immersed in a gas absorption liquid or reaction liquid. Thereby, the gas is fully processed. For example, when sponge is used as the porous body, and the gas absorption liquid contained therein fully absorbs and saturates the gas, the sponge can be immersed in a new absorption liquid after the sponge is wrung out, and then the gas treatment can be repeatedly performed. In the case of continuous, long-term gas treatment, it is necessary to continuously supply a treatment liquid such as an absorption liquid to the porous body. In this case, it is preferable to supply a small amount of the new liquid of the gas absorption liquid or the reaction liquid from the exhaust side of the gas to be processed, and use the gravity as the power to discharge the processed liquid from the gas introduction side. Figure 3 shows the gas treatment device 20a and perforated plate 4a of the present invention. The paper size is applicable to the national standard (CMS) A4 specification (210X297 mm). Λ (read the precautions on the back before filling this page) )

, * IT line Printed by the staff of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by the cooperative 503122 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by A7 _____ Β7 _V. Description of the invention (), 4 b Configured in a cylindrical container (filling tower) 3 a Inside the upper and lower portions, a porous body 1 a such as sponge is filled between the plates 4 a and 4 b. The gas to be processed introduced from the gas inlet 10 near the bottom of the tower .3a passes through the porous body 1a, and is discharged from the exhaust gas outlet 11 at the upper end of the tower 3a. On the other hand, the processing liquid of the gas absorption liquid and the reaction liquid is pumped from the processing liquid tank 5 through the supply pipe 7 by the pump 6 and drips the porous body 1 a downward from the filling tower 3 a ° from the discharge of the gas to be processed Gas side. (Exhaust gas exhaust port 1 1 side) A new liquid such as a gas absorbing solution of the porous body 1 a is dripped down and permeates the porous body 1 a, and lb is kept constant. As soon as the treatment liquid in the porous body 1a exceeds a certain amount, it is dropped and discharged from the porous body 1a by gravity. As shown in Fig. 3, if a new liquid is supplied from the exhaust side of the gas to be processed, the new processing liquid is gradually moved from the porous body to the gas introduction side (the gas introduction port 10 side) while absorbing gas. Therefore, the gas concentration in the processing liquid moving along the porous body 1 a becomes high as it approaches the gas introduction side, and reaches the lower plate 4 b & the processing liquid that fully absorbs the gas when the processing (absorption) capacity is the lowest. It falls and passes through the absorption liquid discharge pipe 8 a at the lower end of the filling tower 20 a and is stored in the waste liquid tank 9 a. If the supply rate of the new liquid is too small, the concentration of the whole treatment liquid may be saturated, and the gas may be discharged without fully absorbing the gas. On the other hand, if the supply rate is too large, the treatment liquid that does not sufficiently absorb the gas will be discharged and wasted. Therefore, it is preferable to appropriately set the supply rate of the new liquid according to the concentration of the gas to be processed and the flow rate conditions. The concentration of the component in the gas discharged through the porous body 1 a is expected to be very low, and at the same time, from the porous body 1 a Disposal of the treatment liquid This paper is based on Chinese national standards (〇 奶> 厶 4 «1 grid (21〇 father 297 mm) (Please read the precautions on the back before filling this page) Binding line -10- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 503122 A7 _____B7_

V. Description of the invention (The gas concentration in A is very high, as close to the saturated concentration as possible. By supplying the processing liquid as described above, continue to maintain the liquid on the gas introduction side to be treated as the old liquid and the liquid on the exhaust side as the new liquid. Only the treatment liquid that fully absorbs the gas is discharged. As a result, as is known in various wet scrubbers, the treatment liquid that self-absorbs the gas again evaporates the gas, which results in a low treatment efficiency and maintains a higher treatment efficiency. The amount of processing liquid supplied to the porous body 1a in the gas processing device shown can be small, so the power for operating the pump 6 is extremely small. Alternatively, a processing liquid tank 5 can be provided above the charging tower 3a without using a pump 6 to supply the processing liquid. Also, in the case where the continuous processing gas is not required, the supply pipe for supplying the processing liquid may not be provided. In this case, the porous body containing the processing liquid in advance may be filled in the tower. The circulating treatment liquid does not need to be provided with power and equipment for circulation, so it is an extremely easy and inexpensive device, and there is no problem of re-evaporation. Figure 4 shows another gas treatment device of the present invention. The illustrated device 2 b The gas processing device 20a of the aforementioned FIG. 3 is filled with a porous porous body lb having air permeability between the upper part and the lower plates 43,413 of the cylindrical container (filling tower) 31, such as tap water. The liquid passes through the nozzle 12 and is sprayed from the top of the filling tower 2 0 b to supply the treatment liquid to the porous body 1 b. The gas to be processed introduced from the gas introduction port 10 is passed through the porous body 1 b impregnated with the gas absorption liquid. It is discharged from the gas exhaust port 11 at the upper end of the tower 2 0 b. While absorbing the gas, the processing liquid reaching the lower plate 4 b falls and is contained in a waste liquid tank 9 b provided at the lower end of the tower 20 b * ( (Please read the notes on the back before filling out this page)

ΐThe paper size is applicable. National Standards (CNS). Eighty-four grid {210X297 mm) — 503122 A7 __ B7__ 5. Description of the invention (g is discharged through the discharge pipe 8 b. So 'because according to the present invention, the processed The gas is impregnated with a gas, an absorption liquid or a reaction liquid, and has a porous porous body that is permeable to air. Therefore, it is almost necessary to supply power for the gas and the processing liquid, so that it is not wasted in the processing liquid and can absorb the gas. Compared with conventional gas treatment devices such as scrubbers that spray absorbent liquid in the filling tower of the Laxihuan ring, it can use a small amount of liquid to achieve a high treatment rate, and it is also a waste of treatment liquid. For example, in the conventional wet scrubber, in order to achieve high efficiency, multiple stages are arranged, so high-efficiency gas treatment can be performed at low cost. (Example) (Example 1) Polyethylene fired hydrophilic sponge sheet (diameter 3 cm (cm) X thickness 3 cm) into a cylinder with an inner diameter of 3 cm, soaking it in water, at a linear velocity of 2 cm / sec, passing through one of the cylinders (the gas introduction side) containing 10 ppm (10 to 6) Air of hydrochloric acid. Another opening for non-sponge tablets (Exhaust gas exhaust side) The concentration of hydrochloric acid was measured and was less than 1 ppm. (Example 2) Approximately 1,000 uniformly dispersed 4 mm (mm) diameter through holes (ventilation paths) were opened in 30 cm cubic porous aluminum in parallel. ). After disposing this porous aluminum in the tube, impregnate 1% caustic soda in the same direction as the ventilation path from one side (gas introduction side). To the opposite side (exhaust gas discharge side), the flow Too much air contains 100,000 of this paper. The national standard (CNS) A4 specification (2 丨 0 parent 297 mm) (please read the precautions on the back before filling this page) Order the staff of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by Jiaofei Cooperative Co., Ltd. 503122 A7 B7 V. Description of the invention () 0PP m hydrochloric acid gas. At this time, the concentration of chlorine-containing gas on the exhaust side of the exhaust gas was measured with a detection tube, and it was found that the detection limit was below i 0.5 ppm. (Example 3) A foamed vinyl chloride sheet (manufactured by Takaramachi Chemical Co., Ltd.) having a thickness of 10 mm was cut, and 27,000 cubes each having an edge of 0 mm were filled into a circle having a diameter of 30 mm. Tube. As shown in Fig. 3, an alkaline liquid is dripped on top of the self-charged substance (foamed vinyl chloride cube). The alkaline liquid system is 35% of stone-aminoethanol, and the dropping speed is 32 (ml) / min (minutes). When the foamed vinyl chloride filled with the substance fully absorbs the alkaline liquid, the waste liquid tank 9 a stores only a small amount of liquid at a time, and flows out from the gas introduction port 10 for a month at a passing speed of 100 L / mi η. Nitrogen containing 1000 ppm m of chlorine. In the meantime, the chlorine concentration in the exhaust gas is continuously monitored at the exhaust gas outlet 11 and usually displays Op pm (the detection limit is 0. 5 p p m or less). (Embodiment 4) As shown in FIG. 4, by spraying nozzle 12, 20 kg (kg) of cylindrical activated carbon with a diameter of 5 mm and a height of 3 mm was filled with 300 mm of the diameter of the cylinder and sprayed with 20 02 / mi η Water supply. Activated carbon is hydrophilic. After fully immersed in water, it begins to fall below the allowable stage. After that, a gas containing 5 ppm H F in the air was passed from the bottom of the cylinder 3 b to the top. Flail treatment for 30 days, air outlet 1 1 This paper size applies to China National Standard (CNS) A4 specifications < 2 丨 0X297 male ~ (Please read the precautions on the back before filling this page)

Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 503122 A7 -__— _B7_ V. Description of the invention () The concentration of H F in the gas of 彳 is usually displayed as 0 p p m (the detection limit is 1 ppm). In addition, the present invention is not limited to the above embodiments. The above-mentioned embodiment is merely an example of ‘anyone having substantially the same configuration and effect as the technical idea contained in the scope of patent application of the present invention’ is included in the technical scope of the present invention. In the foregoing embodiment, the case where the porous body is filled in a cylindrical container and the gas is used as a center will be described. However, the shape of the container is not limited to a cylindrical shape. For example, the porous body can be filled in a horizontally long container, and the treatment liquid of the absorption liquid can not only flow in the vertical direction, but also can flow and supply in the horizontal direction or in an oblique direction for gas treatment. As for the processing gas, it is not limited to the harmful gas discharged during processing, but also applicable to all fields for the purpose of absorbing gas to liquid. (Effects of the Invention) Since the present invention uses a porous porous body impregnated with a gas absorbing solution or a reaction solution, the gas can pass through the gas to be processed while ensuring a large gas-liquid contact area, so that it can be processed with high efficiency. gas. Since the processing liquid such as a gas absorption liquid is held in the porous body, a high concentration of gas can be dissolved in a small amount of the processing liquid without wasting the processing liquid. The new liquid of the gas absorption liquid or reaction liquid is supplied to the bulk porous body from the exhaust side of the gas to be processed, and the processed liquid is discharged from the gas introduction side, thereby maintaining the liquid on the gas introduction side. It is the old liquid, and the liquid on the exhaust side is the new liquid. In this way, to eliminate the various wet-type polyester paper standards that are familiar with the application of ZTE National Standards (0 ^) 8 4 wash grids < 210 > < 297 mm) ~ {Please read the precautions on the back before filling in this Page) Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by 503122 Printed by the Consumers’ Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by A7 B7 V. Invention Description (& In this case, it is argued that the processing efficiency is higher. Therefore, in order to achieve high efficiency, it is not necessary to configure the multi-stage configuration, and the cost of the equipment can be suppressed. Brief Description of the Drawings Figure 1 is a diagram for explaining the concept of the invention. Figure 2 Fig. 3 is a schematic view showing a block-shaped porous body provided with a ventilation path in the porous body. Fig. 3 is a schematic view showing a configuration example of a gas processing apparatus of the present invention. Fig. 4 is another configuration example of a gas processing apparatus of the present invention. Symbols 1, 1 ', la, lb: porous body 2: ventilation path 3a, 3b: cylindrical container (filling tower) 4 a, 4 b: perforated plate 5: treatment liquid tank 6: Pump 7: supply pipe 8 a 8 b: discharge pipe 9 a, 9 b: Waste liquid tank 1 0: Gas inlet 1 1 ·· Exhaust port 1 2: Nozzle 2 0 a, 2 0 b: Gas treatment device fPlease read the notes on the back before filling in this page}

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Claims (1)

503122 A8 B8 C8 ___ D8 6. Scope of patent application 1. A gas treatment method, characterized in that the gas to be treated is passed through a porous porous body that is impregnated with a gas-absorbing liquid or reaction liquid and has air permeability. 2. A gas processing method, characterized in that one of a plurality of porous porous bodies impregnated with a gas absorbing solution or a reaction solution and having air permeability is self-filled with a gas to be processed, and flows to another container Opening. 3. The gas processing method according to item 1 of the scope of patent application, wherein a ventilation path is provided in the aforementioned porous porous body itself. 4. The gas processing method according to item 2 of the scope of patent application, wherein a ventilation path is provided in the aforementioned bulk porous body itself. 5 · The gas treatment method according to any one of claims 1 to 4, wherein the new liquid of the gas absorption liquid or the reaction liquid is supplied from the exhaust side of the gas to be treated to the bulk porous body, The processed liquid sheet is discharged from the gas introduction side. 6. The gas treatment method according to any one of claims 1 to 4, in which a substance having an affinity for a gas absorbing solution or a reaction solution to be used is used as the aforementioned bulk porous body. 7. The gas treatment method according to item 5 of the scope of application for a patent, wherein the aforesaid massive porous body is used which has an affinity for a gas absorption liquid or a reaction liquid used. 8. A gas processing device, which is used to charge a charge. In the device, a gas absorption liquid or a reaction liquid is supplied to the charge, and the processed gas introduced from the gas inlet is passed through the charge. After that, those who discharged from the exhaust gas outlet are characterized in that the aforementioned filling system is impregnated with a gas absorbing solution or a reaction paper of 0L scale and used the Chinese National Standard (CMS) A4 (210X297). (Please read the back first Please note this page before filling in this page) * 1T · —Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-16- 503122 B8 C8 D8 VI. Patent application scope liquid and air-permeable block porous body * > 9. The gas processing device according to item 8 in the patent application, wherein the block porous body itself is provided with a ventilation path. 10. The gas processing device according to item 8 or 9 of the scope of application for a patent, wherein the aforesaid massive porous system has an affinity for the gas absorption liquid or reaction liquid used. (Please read the notes on the back before filling in this page) * π Silk Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -17 · This paper ruler JL is used by China National Fengfeng (CNS) Α4 Washer (210X297)