TW200413077A - Method and device for condensing materials with a boiling point higher than that of water from an exhaust - Google Patents

Abstract

One objective of the present invention is to provide a method and a device for concentrating volatile chemical materials (such as water soluble solvent) with a boiling point higher than water from an exhaust, in which volatile chemical matters are substituted by steam in order to be effectively recycled, while the exhaust is purified. Another objective of the present invention is to provide a method and a device, in which thermal energy in a high temperature (100DEG C ~120DEG C) exhaust generally discharged from a process for producing a lithium ion battery is recycled by evaporating water introduced from the outside so that volatile water soluble chemical matters having boiling points higher than water in the exhaust are condensed. That is, a component in the exhaust is substituted by water. Thus, the component can be effectively recovered while the exhaust is purified by the absorption by the replenished water at a lower temperature. A third objective of the present invention is to provide a method and a device, in which a powder containing active carbon etc. is used to absorb chemical matters (e.g. dioxin, etc.) contained in an exhaust in order to purify the exhaust. A method and a device for concentrating matters having boiling points higher than water from exhaust are characterized in that: a tower plate has a structure where a gas can not go through the tower plate without first goes through the water exists in the tower plate. An exhaust containing matter(s) having a boiling point higher than water is introduced into the lower part of a multilayered distillation tower multi-sectionally installed with the tower plate or a packing tower packed with a hydrophilic packing; and on the other end, water is supplied from the top part of the tower. So that the matter(s) having a boiling point higher than water is concentrated at the lower part of the tower due to a gas-liquid equilibrium relationship between the exhaust and water; and the matter(s) remained in the exhaust is further transferred to water at the top part of the tower.

Description

200413077 V. Description of the invention (1) The technical field to which the invention belongs: The present invention relates to a method for concentrating and recovering a substance that has a higher boiling point than water contained in exhaust gas and utilizing the difference between the boiling point of water and purifying the exhaust gas. Methods. Prior technology: In the past, when the exhaust gas containing a water-soluble solvent with a higher boiling point is purified, the exhaust gas containing a water-soluble solvent is sent from the lower part of the absorption tower, and a large amount of water flows into the upper part of the absorption tower for washing. The aforementioned exhaust gas.

This washing method requires a large amount of water for washing. Since the concentration of the solvent contained in the waste water is extremely low, and the cost of solvent recovery is required, there are problems that the solvent cannot be recovered in practice and waste water treatment is required. As another prior art system, while rotating a horizontally arranged drum filled with an adsorbent such as zeolite, the aforementioned exhaust gas cooled to room temperature is passed through, and a part of the gas is directly discharged into the atmosphere, and the other part is heated (In order to drive out the components adsorbed on the adsorbent), then pass to a roller arranged in a horizontal direction filled with the adsorbent such as the above mentioned stone to desorb the adsorbed substances. Solvent processing gas

Cool to recover solvent. Since this method also requires operations such as once-cooling the exhaust gas, heating after the adsorption treatment, and re-cooling in order to recover the solvent, the energy efficiency is extremely poor. π] Remove the waste discharged by the drying step of the chain electrode: package: = knife in the absorption of N-methyl-2-pyrrolidone

200413077 V. Description of the invention (2) The situation of obvious decline, so it is necessary for the cooling step discharged from the aforementioned drying step = 12 liters of gas to adsorb N-methyl-2 after the adsorbent ' In order to remove N-methylketone 'from the adsorbent, a heating operation is necessary instead. This previous step is shown in Figure 2. Step:;: If the cattle according to the previous method 'three steps of cooling step and adsorption step are necessary', and after cooling the exhaust gas with a corresponding temperature, there will be a large number of re-heating accompanied by reheating. Purify the exhaust water-soluble gas. The hair is often replaced by evaporative chemical conversion to the temperature of the discharge to supplement the water. The hair contains the problem solved by absorption: The first purpose of the invention is to provide a boiling point higher than that of water and water contained in _. Steam replacement, and the obvious second purpose is to provide the use of heat from the lithium ion battery electrode exhaust gas, so that the substance contained in the exhaust gas is condensed down, that is, 'effective recovery, the same absorption effect, The third purpose of purifying the exhaust gas is to provide a method and device for attaching chemicals such as dioxins. Among them, volatile chemical substances such as effective recovery are used, and a method and device are discarded. At 100 ° C ~ 120 ° C, the supplementary water introduced from the outside will be more water soluble than the water. The water-soluble components of the exhaust gas and water will be added to the water by adding low-temperature based chemical. A method and device in which the waste of powders such as negative activated carbon is discarded

200413077 V. Description of the invention (3) Gas to recover adsorbed dioxin and other compounds and purify the exhaust gas. Means to solve the problem of the powder of active carbon of yogo shellfish. The first item of the present invention relates to a method for concentrating a substance, which is characterized in that: if the buddha in waste milk is higher than water, , The gas cannot pass through to the top = the multi-layer steamed tower on the tray where this type of tray is installed = the tray. The lower part of the multi-storied tower is filled with sexual fillers with a higher boiling point than water. (Usually the exhaust gas at room temperature Wu; on the other hand, but the energy), in the lower part of the tower, with =, do not use for heating or cooling system, the aforementioned boiling point is higher than water #EGR and # 水The foregoing in the exhaust gas remaining in the gas-liquid equilibrium barrier is concentrated, and at the same time, the second item of the present invention in the upper part of the tower is related to shellfish; it is transferred to water. The method for concentrating a substance having a high water content is a substance having a boiling point higher than (a) a volatile chemical substance in the exhaust gas, and a substance having a higher boiling point than the water. The third aspect of the present invention is a powdery substance. The method for concentrating substances with high water content is described in item ^. The substance with a relatively high boiling point in the exhaust gas is controlled by the information on the powder of the substance with a higher boiling point in the upper part of the tower. The amount of water in the scoop is based on the weight and weight of the lower part of the tower. Concentration of the aforementioned substance recovered in the lower part The fourth aspect of the present invention is a method for concentrating a substance with a high water content, which is related to the powder having a boiling point in the exhaust gas which is relatively stale as described in the third aspect. ,, said the powdery substance is adsorbed by Dior

2042-5666-PF (Nl); Tcshiau.ptd page 200413077 Description of the invention (4) Water high term system /, Off: Middle: Description The lower concentration L of water supplied from the upper part of the tower is based on the volatilization of the tower. Control engineer :; It is two times ^ fi is # 士 日 日 of the present invention. ^ 0 The method of concentrating substances with high water content, as described in item 5, the quality of the boiling point in the exhaust gas is as follows; t ;; ::: Among them, the aforementioned hydrophilic and volatile chemical NMP (N-methyl-2 :; than selected solvents in the group consisting of: alcohol), DEG (_H & amine), DMS. (Dimethylarsine), EG (ethylene glycol, called :: alcohol,; = triethylene glycol amine), and coffee (diethylene glycol-D methyl (1 trip; _. Butanol), MEA (-ethanol Concentration i and r are related to-a kind of boiling point is relatively water ^ ^ π) and even T: Temple is composed of the following devices ... the gas can not pass through the distillation tower or Filling and filling the multi-layer steaming installation of this type of tray (2) ΛΤ The water supply device of multiple stages is installed; the top of the true filling layer is arranged in the gas filling tower of the multi-port steaming tower. ^ (4) The liquid set in the lower part of the retort tower or the lower part of the packing layer

200413077 —— V. Description of the invention (5) Body substance discharge port; (5) Liquid substance storage tank connected with liquid substance discharge port through pipeline and containing substance with higher boiling point than water; (6) Used for multilayer distillation (7) A device for controlling the water supply amount from the water supply device by using the information from the measurement device.

The invention relates to a method for efficiently utilizing the heat of exhaust gas, which usually has a relatively high temperature (for example, 80 to 120 ° C), and passes the exhaust gas in a multi-layer distillation tower to simultaneously achieve the content contained in the exhaust gas. A highly efficient method and device for recovering materials with boiling points that are more rainy and rainy and treating exhaust gas. In the present invention, especially if it does not pass through the water existing in the tray, the gas cannot pass through to the upper structured tray, such trays are set up in multiple stages, or the multilayer distillation column is filled with hydrophilic packing. In the lower part of the packed tower, δ has a high temperature exhaust gas of 100-120 N-fluorenyl-2- 2-biloxanone discharged by the electrode process of the bell ion battery; on the other hand, water is supplied from the upper part of the tower to the tower. The lower part uses the heat of the exhaust gas to evaporate the supplied water. Conversely, the exhaust point contained in the exhaust gas has a higher boiling point than the water and the water-soluble N-methyl-2-, iir, fw Tian I I 下 σ 卩, hunting by The residual exhaust gas I 2 -pyrrolidone remaining in the upper part of the tower is then transferred to water. With the purification of the waste gas in the lithium 1-cell electrode process, it is also very suitable as a method and a device for recovering ν-2-pyrrolidone. The above-mentioned supplementary water amount is the treated exhaust gas discharged from the upper part, which includes the amount of water (B) flowing out of the system from the multi-layer steaming tower after the exhaust gas treatment.

200413077 V. Description of the invention (6) 'and the amount of water ((;) flowing out from the lower part of the tower along with the condensate of volatile chemical substances with a higher boiling point than water, can supplement the two amounts of water (A). In other words , Because it can be: "

A = B + C Compared with the waste water treatment method based on the previous technology, the amount of water is greatly reduced. From this point of view, it is possible to achieve resource conservation and the same day as the original wastewater to be treated for wastewater. The fact that this has not actually happened is also a great advantage. The temperature at the top of the tower was made higher than the outside air temperature. Because the temperature of the saturated water is higher than that of the water, the moisture in the exhaust gas in the multi-layer distillation column is often easily lower than the saturation point, and even if supplemental water is added, it can be made to meet the condition of Xac $ xs. The temperature of the make-up water is better if the absorption efficiency is lower ', but if it is too low, the amount of flowing water in the tower is not only insufficient, but also requires energy for cooling. Furthermore, the outside air is usually unsaturated, and since the moisture content that does not reach the saturation expressed by humidity exists, the amount of supplemental water is larger than the saturated state. The substance having a higher boiling point than water according to the present invention is (a) a volatile chemical substance or (b) a powdery substance. As a volatile chemical substance (a) having a boiling point higher than water, a water-soluble solvent having a boiling point higher than water is a representative chemical substance. _ As such solvents, they are NMp (N_methyl_2-pyrrolidone, Bp: 1 97 C), DMF (N, N-dimethylformamide, Bp: 155.0, DMAC (N, N -Dimethylacetamide, Bp: 165.0, DMS 0 (dimethylarsine, BP.189C), EG (ethylene glycol, Bp: 197.0, DEG (diethylene glycol,

2042-5666-PF (N1); Tcshiau.ptd page 10 200413077 Description of the invention (7) 7 II; 45. 〇, TEG (triethylene glycol, BP: 278 t), PGME (propylene glycol-acetamidine), PG (propylene glycol, BP: 188. 0,], 4_BD (1, "BP: 235. 0, MEA (monoethanolamine, Bp: 17.0.5.0, with-I, (diethylene glycol-methyltransfer) # 'it is not suitable for azeotropy with water> As the powdery substance of the above (b), : Adsorption of dioxin-like activated carbon powder in incineration gas, etc. a method passes through the existence of water in the above tray, then the gas is free of 造: The tray can be made from the earliest used In addition to the blister plate, there are porous plates developed later. In terms of cost, blister plates are preferred; in terms of cost, perforated plates are preferred. The hydrophilic colony in the tower can be the shape of the regular filler, or the shape of the irregular filler, but if the pressure loss is considered, the regular filler is better., Fill 4 =: "" "Persons with a large surface area, such as hydrophilic materials; = Porous substances', specifically, can be exemplified by: porous m according to the present invention, especially in Zhongli Disposal of waste produced by the manufacture of sub-cells. As shown in Figure i, in order to remove the NMP solvent, the general air is input from the outside of the factory. 5 After the soil, specific filtration, the air wheel is heated by a blower. Send to the drying step; ..., move the air system usually input from outside the factory, 'outside air temperature t

200413077 V. Description of the invention (8) Flow rate VN m3 / mi η Moisture content Xa kg / m3 Moisture content VXa kg / min In the chain ion battery manufacturing plant, it is used to remove N-methyl-2-role ketone (NMP ) The exhaust gas discharged in the solvent drying step is the exhaust gas temperature at the NMP content, the NMP flow rate, and the exhaust gas flow rate = 1 0 0-1 20 ° C Cn = 0 · 0 0 0 5 ~ 0 · 01 kg / m3

(113 ~ 2260ppm, νο1 · / νο1 ·) VCn kg / min V N m3 / m i η Moisture content VXa kg / min is fed from the lower part of the multilayer distillation column (water displacement column). In the water displacement tower, the uppermost stage of a multi-stage blister plate or perforated plate, etc., is usually supplied with supplemental water at a normal temperature such as squeegee at a flow of $ M kg / m i η. Replaced by water, the treated gas discharged from the upper part (gas temperature is the recovery rate (weight fraction) of volatile volatile chemicals with r as NMρ), the discharge amount V Nm3 / min is calculated as the different water content VXa + [μ — vCnR (l / Xn —1)] kg / min kg / m3 Calculate moisture content Λ + [Μ -VCnR (l / Xn —1)] /

At the gas temperature h, the gas saturation moisture content: χ As a control condition, X < γ η ^ s thousand Xac = \ day inch, the device can operate normally. Aspect ’: Reclaiming water-containing Buchanji-1 from the lower part of the water replacement tower 2

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Orbirazone (liquid temperature ^ Embodiment: The following is a description of these examples "P" "to illustrate the present invention, but the present invention is not affected by%. The% in the examples is weight unless otherwise indicated Example 1 The air shown in Figure 1 & Tanone (NMP) solvent = the air system input in the dry step of removing the N-methyl-2-Hydrogen of lithium ion batteries

1 air temperature t = 1 5 ° c / ;, L ^ V = 4 N m3 / mi η A, fire rate Xa = 〇 · 〇 1 2 8 kg / m3 (assuming saturated m) VXa = 0.0512 kg / min In the Zhongwei battery manufacturing industry, the exhaust gas emitted by the drying step to remove the N-fluorenyl-2—NMP solvent is at an exhaust gas temperature tl =: 1 2 0 〇C NMP content Cn: = 0.0031 kg / m3 (70Oppm, vo 1 · / vo 1 ·) NMP flow rate VCn = 0.012 4 kg / min exhaust gas flow rate V = 4 N m3 / min moisture content VXa = 0.0512 Under the condition of kg / min, it is fed from the lower part of the multilayer distillation column (water displacement column). In the water displacement tower, the uppermost stage of the multi-stage blister plate is set with M = 0 · 1 7 8 6

2042-5666-PF (Nl); Tcshiau.ptd Page 13 200413077 V. Description of the invention (10) The flow rate of kg / min is used to supply make-up water with water temperature t3 = 20 ° C. The treated gas (gas temperature t2 = 4 2 ° C) discharged from the upper part of the water replacement tower is V = 4 Nm3 / min. The calculated water content is VXa + [M —VCnR (l / Xn-1)] = 0.2180 kg / min Calculate moisture content xac = xa + [M —VCnR (i / xn-1)] / V = 0 · 0 545 kg / m3 at body temperature t2 = 4 2 ° C, gas saturation moisture content: & = 0.0565 kg / m3

thus,

Xac = 0. 0545kg / m3 ^ Xs = 0. 0565kg / m3 NMP content Cn (l-R) = 〇. 〇〇〇i5kg / m3 This device can operate normally.

On the other hand, under the following conditions, N-fluorenyl-2-pyrrolidone containing water can be recovered from the lower part of the water displacement column (liquid temperature t4 = 80 ° C). t4 = 8 (TC

Water VCnR (l / Xn — 1) in the collection solution = 0.11818 kg / min NMP VCnR in the collection solution = 0.11818 kg / min Recovery of NMP R = 0.95 (weight fraction) NMP concentration Xn = 0.50 (weight fraction) Furthermore, the mass balance system of the water replacement tower is shown in FIG. 2. Effects of the Invention: (1) Based on the present invention, significant step simplification and energy saving can be achieved.

-PF (Nl); Tcshiau.ptd Page 14 200413077

In the above method, the system adopts a wide range of solvent components that should be recovered: feed water, so that the solvent is dissolved in the water to form an exclusive 牯, because the temperature of the system is high, then, the Roppongi clothes are placed. The water supplied to the washing tower needs to be cooled beforehand, and the solvent of the second water will be volatilized again, so the energy will be reduced. On the other hand, = right. Therefore, it needs to be used, so the exhaust gas supplied to the concentrating device effectively utilizes the exhaust gas 月 for one month, so it is directly supplied, so the thermal efficiency; = heating or cooling is required, and two: (3) If according to the present invention,

Just add water, ‘then the prior art: the water used, only need—where: compared with the previous method’, the amount of water can be reduced:

2042-5666-PF (Nl); Tcshiau.ptd Page 15 200413077

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Claims (1)

200413077 VI. The method of concentrating the patent application scope is 1 ~ 2. The method of concentrating a substance higher than water at the point of 2nd point is specially connected to the water on the tray, so the gas cannot pass through the tower or be filled: water filling ：： The multi-layer steamed lower part of this f tray, Lu 1 :, On the other hand, the water is supplied from the upper part of the tower, and the "focal force = gas-liquid equilibrium relationship" in the tower water is higher, and the aforementioned Buddha points are further added to the tower. The remaining substance in the upper part of the exhaust gas is the substance with a boiling point higher than that of water in the exhaust gas, or the substance with a higher powder point than the water is the substance 3, which is provided by the upper part of the tower: : The amount of the substance is in powder form: before the control, recovered from the lower part of the tower ;: concentration information 1 ~ 30% by weight. The content of the negative control is concentrated: K dry::% A powder having a higher boiling point in the exhaust gas than water. /, The powdery substance is a substance that adsorbs dioxin. 5. A method for concentrating a substance as described in item 丨 of the patent application scope, wherein the aforementioned boiling points and * boiling points are higher than water f: Hair chemicals, from the upper part of the tower Controlled by the concentration information of Hydrophilic 1 'Returned from the lower part of the tower: = Based on the control of the concentration of the chemical compounds emitted from the tower to 20 to 100% by weight of hydrophilicity. Vol.17, 2042-5666-PF (Nl); Tcshiau .ptd 200413077 6. The method of concentrating substances as described in the scope of application for patent No. 5, wherein the above-mentioned group of voluminous compounds whose boiling point is higher than that of water is formed by the following compounds, and the two volatile, chemical substances are methyl-2-pyrrolidone ), DMF (N Γ ^ = selected solvents · 1MP (N-dimethylacetamide), DMS0 (dimethylmethylene maple) amine), D_, N-glycol), TEG (triethylene glycol) ), PGMe (ethylene glycol), DEG (— alcohol 14L4 — butanediol), 27% dioxin), PG (propylene glycol (diethylene glycol monomethylamine). 嶋 (monoethanolamine), and 7 · —A kind of material with a higher boiling point than water: It is composed of the following devices, ~ shrinkage set, which is characterized by, 甬 to (i does not exceed the water in the plywood, then the gas cannot pass through ^ # 之 仏 The trays are composed of a multi-layer tomb distillation tower or a packed tower filled with hydrophilic fillers in multiple stages; (2) It is above the multi-stage tray and above the multi-layer base distillation tower. A water supply device provided inside; or a water supply device provided above the filling layer in the aforementioned filling tower; (3) a processing gas discharge port provided on the upper part of the multilayer distillation tower or the upper part of the filling layer; (4) The lower body substance discharge port at the lower part of the multi-layer distillation column or the packed layer; (5) a liquid substance storage tank connected to the liquid substance discharge port via a pipeline and containing a substance having a higher boiling point than water; (6) used for Determination of the concentration in a system of a substance with a higher boiling point than water set in a multilayer distillation column or a packed column; ^ 2042-5666-PF (Nl); Tcshiau.ptd 200413077 6. Scope of Patent Application (7) The device for controlling the water supply from the aforementioned water supply device by using the information from the aforementioned measurement device. iiiii 2042-5666-PF (Nl); Tcshiau.ptd p. 19