JP2010247019A - Solvent gas producer, solvent gas treatment apparatus using the same, and operation method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solvent gas producer achieving the stable gasification of a solvent solution of a volatile organic compound and enhanced in safety. <P>SOLUTION: The solvent gas producer includes a gasification pipe 121 for heating and gasifying the solvent solution supplied by a pump 118, a heating means 122 for heating the gasification pipe, a temperature regulating means 122a for detecting the temperature of the gasification pipe to control the same to a predetermined temperature, a nozzle orifice 129 having an ejection opening for ejecting a solvent gas, a drive means 130 for driving a needle 131 of opening and closing the jet opening of the nozzle orifice, and a diluting gas supply means 136 for supplying diluting gas which must be mixed with the solvent gas. The solvent solution supplied to the gasification pipe, which is heated by the heating means, by the pump is heated and gasified to produce the solvent gas, the nozzle orifice is opened to eject the solvent gas and the diluting gas is mixed with the solvent gas ejected from a nozzle to supply the solvent gas to a solvent gas treatment apparatus as a diluted solvent gas. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a solvent gas generation device containing a volatile compound such as a volatile organic compound (VOC), a solvent gas treatment device for purifying an exhaust gas (treated gas) using the same, and an operation thereof It is about the method.

  The following are typical examples of this kind of solvent gas generator. The solvent liquid is supplied to the spray nozzle through a solvent supply pump and a solvent liquid supply pipe. The spray nozzle sprays the solvent liquid into the heat source box. The sprayed solvent liquid is vaporized by hot air in the heat source box. The solvent liquid that could not be vaporized by the hot air adheres to the plate heater provided in the spraying direction, and falls and adheres to the plate heater provided on the bottom surface. The plate heater heats and vaporizes the attached solvent liquid. Further, the solvent supply pipe is provided with a solvent supply heater for heating the solvent therein (see, for example, Patent Document 1).

  In recent years, odor complaints from small and medium-sized businesses and livestock industries close to the living environment have increased, and the sources of odor causing complaints tend to diversify. Among them, volatile organic compounds (solvent gases) contained in gases discharged from printing / painting plants and the like not only cause bad odor, but are also causative substances such as suspended particulate matter (SPM) and photochemical oxidants. For this reason, countermeasures for reducing volatile compound emissions at individual offices are required. In 2006, the Air Pollution Control Law was amended to set volatile compound emission standards for large-scale facilities.

  As a method for deodorizing bad odors, purification methods for gases generally called volatile compounds such as flammable hydrocarbons include decomposition methods (combustion, catalytic decomposition, etc.), removal and separation methods (adsorption, cooling). It can be roughly classified into biological deodorization methods such as condensation and recovery methods).

  In the purification treatment method and the apparatus thereof, conventionally, the volatile compound component in the gas to be processed (the gas to be processed) from the generation source on the inlet side of the processing apparatus and the gas in the processing gas on the outlet side of the processing apparatus have been generally used. The concentration of the volatile compound component was measured with a concentration measuring device to grasp the purification treatment capacity and to perform overall control of the apparatus.

  The following are typical examples of the processing apparatus described above. An exhaust gas treatment monitoring device for removing a volatile compound contained in exhaust gas and monitoring a treatment function of a recyclable exhaust gas treatment unit in order to accurately grasp a removal state of a volatile compound, Concentration detecting means for detecting an inflow concentration of the volatile compound flowing into the exhaust gas treatment unit along a gas flow path and an exhaust concentration of the volatile compound discharged from the exhaust gas treatment unit, and the inflow concentration And an exhaust gas treatment monitoring apparatus and an exhaust gas treatment device provided with a state detection means for detecting a deterioration state of the treatment function during use of the exhaust gas treatment unit or a recovery state of the treatment function during regeneration based on the exhaust concentration. (For example, refer to Patent Document 2).

JP-A-11-221908 JP 2008-302348 A

  However, the one described in Patent Document 1 sprays the solvent liquid in the heat source box and adheres the sprayed solvent liquid to the plate heater provided in the hot air and the spraying direction, and the plate heater provided on the bottom surface. Since the solvent liquid is heated and vaporized, the temperature fluctuation of the plate heater, the vaporization delay of the adhering solvent liquid, etc. are likely to cause fluctuations in the vaporization speed on the plate heater surface, and the amount of solvent gas generated pulsates. In some cases, the sprayed solvent liquid is discharged out of the heat source box without being vaporized by the supplied hot air, and stable vaporization of the solvent liquid becomes a problem.

  Moreover, what was described in above-mentioned patent document 2 branches and switches a part of waste gas (to-be-processed gas) which should contain the purification process containing a volatile organic compound component, and the process gas after purification process, and each gas The concentration of the volatile organic compound component is measured with a gas sensor.

  In this case, the concentration of the volatile organic compound component in the exhaust gas to be purified (the gas to be treated) discharged from the generation source of the volatile organic compound component-containing gas such as a coating factory, a printing factory, or a chemical factory is extremely high. It is unstable, and the concentration of the volatile organic compound component always fluctuates in a very short time and does not become constant, and various volatile organic compound components may be mixed.

  In addition, when the generation source of the volatile organic compound component-containing gas is stopped and there is no generation of the volatile organic compound component-containing gas, the processing capability of the processing apparatus cannot be evaluated.

  For this reason, it is impossible to always evaluate the processing capability of the solvent gas processing apparatus accurately and stably due to the fluctuation (variation) of the concentration of the volatile organic compound component in a short time. Further, it is not possible to evaluate the processing capability of the solvent gas processing apparatus by arbitrarily changing the amount of the gas to be processed or the concentration of the volatile organic compound component in the gas to be processed to various conditions.

  SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and for the purpose of evaluating the processing capacity of a solvent gas processing device, a solvent gas generator that is capable of stable vaporization of a solvent solution of a volatile organic compound and an improvement in safety. The purpose is to provide. It is another object of the present invention to provide a solvent gas processing apparatus and a method for operating the solvent gas processing apparatus that can always accurately and stably evaluate the processing capacity of volatile organic compounds.

  The solvent gas generator of the present invention supplies a solvent gas obtained by heating and evaporating a solvent liquid of a volatile organic compound for an operation for evaluating the processing capability of the solvent gas processing apparatus for processing a gas to be processed containing a volatile organic compound. A solvent gas generator, a tank for storing a solvent liquid of a volatile organic compound, a pump for sucking and discharging the solvent liquid from the tank, and a vaporization pipe for heating and vaporizing the solvent liquid supplied by the pump as a solvent gas Heating means for heating the vaporization pipe, temperature adjusting means for detecting the temperature of the vaporization pipe and controlling it to a predetermined temperature, a nozzle hole having a jet outlet for jetting the solvent gas vaporized in the vaporization pipe, Vaporization heated by the heating means, comprising driving means for driving a needle for opening and closing the nozzle hole, and dilution gas supply means for supplying a dilution gas mixed with the solvent gas The solvent liquid is supplied to the pump by a pump and vaporized into a solvent gas, and the needle is driven to open the nozzle hole to eject the solvent gas, and the diluent gas is mixed into the solvent gas ejected from the nozzle hole. A diluted solvent gas is used, and the diluted solvent gas is supplied to a solvent gas processing apparatus.

  The solvent gas processing apparatus of the present invention includes the solvent gas generator, a solvent gas processing apparatus main body for processing a gas to be processed containing a volatile organic compound, and a solvent gas processing apparatus main body for the gas to be processed containing a volatile organic compound. A supply line to the solvent gas processing device main body of the diluted solvent gas generated by the solvent gas generator, and the diluted gas generated by the gas to be processed and the solvent gas generator The supply to the solvent gas processing apparatus main body can be selected, the evaluation operation of the solvent gas processing capacity of the solvent gas processing apparatus main body by the supply of the diluted solvent gas generated by the solvent gas generator, and the supply of the gas to be processed This makes it possible to perform a processing operation of the gas to be processed.

  The operation method of the solvent gas processing apparatus of the present invention includes the solvent gas generator, a solvent gas processing apparatus body for processing a gas to be processed containing a volatile organic compound, and a gas to be processed containing a volatile organic compound. A supply line to the main body of the solvent gas processing apparatus and a supply line to the main body of the solvent gas processing apparatus of the diluted solvent gas generated by the solvent gas generation apparatus, and the generated gas to be processed and the solvent gas generation apparatus It is possible to select supply of diluted solvent gas to the solvent gas processing apparatus main body, evaluation operation of the processing capacity (of solvent gas) of the solvent gas processing apparatus main body by supplying diluted solvent gas generated by the solvent gas generating apparatus, It is possible to perform a processing operation of the gas to be processed by supplying a processing gas, and supply a dilute solvent gas from a solvent gas generator to process the solvent gas of the solvent gas processing apparatus body After evaluation operation, it is characterized in that performing the processing operation of the gas to be treated by the supply of the gas to be treated.

  According to the solvent gas generator of the present invention, it is possible to stably vaporize the solvent liquid of the volatile organic compound and improve safety. Moreover, according to the operation method of the solvent gas processing apparatus and the solvent gas processing apparatus of the present invention, it is possible to always evaluate the processing capability of the volatile organic compound accurately and stably.

  The first aspect of the present invention is the generation of a solvent gas for supplying a solvent gas obtained by heating and vaporizing a solvent liquid of a volatile organic compound as an operation for evaluating the processing capacity of a solvent gas processing apparatus for processing a gas to be processed containing a volatile organic compound. A tank for storing a solvent liquid of a volatile organic compound, a pump for sucking and discharging the solvent liquid from the tank, a vaporizing tube for heating and vaporizing the solvent liquid supplied by the pump as a solvent gas, Heating means for heating the vaporizing pipe, temperature adjusting means for detecting the temperature of the vaporizing pipe and controlling it to a predetermined temperature, a nozzle hole having a jet outlet for jetting the solvent gas vaporized in the vaporizing pipe, and the nozzle hole Drive means for driving a needle for opening and closing the gas, and dilution gas supply means for supplying a dilution gas mixed with the solvent gas, and a pump is attached to the vaporization tube heated by the heating means. The solvent liquid is supplied and vaporized by heating to form a solvent gas, and the needle is driven to open the nozzle hole, the solvent gas is ejected, and the diluent gas is mixed with the solvent gas ejected from the nozzle hole to dilute the solvent gas. The solvent gas generator is characterized in that the diluted solvent gas is supplied to a solvent gas processing device.

  As a result, only the solvent liquid is supplied to the vaporizing pipe for heating and vaporizing the solvent liquid supplied by the pump, and no air is supplied. Therefore, the preheating time by the miniaturization of the vaporizing pipe itself and the electric heater is shortened and the time is shortened. In addition to being able to vaporize the solvent gas, heating and vaporizing in the absence of air to form the solvent gas is safe without the risk of ignition. Further, since the solvent gas obtained by heating and evaporating the solvent liquid is sprayed from the nozzle hole and then the dilution gas is supplied and mixed, the solvent gas and the dilution gas can be mixed uniformly. Furthermore, it is possible to instantaneously control whether or not the solvent gas is ejected by opening and closing the nozzle hole. Therefore, it can be set as the solvent gas generator which aimed at the stable vaporization of the solvent liquid of a volatile organic compound, and the improvement of safety | security for evaluation of the processing capacity of a solvent gas processing apparatus.

  According to a second invention, in the first invention, the solvent gas in the diluted solvent gas is controlled by controlling the supply amount of the solvent liquid to the vaporization tube by the pump and / or the supply amount of the dilution gas by the dilution gas supply means. The solvent gas generating device is characterized in that the concentration of gas can be adjusted and the diluted solvent gas is supplied to the main body of the solvent gas processing device.

  As a result, the diluted solvent gas whose solvent gas concentration is arbitrarily changed under various conditions can be supplied to the solvent gas processing apparatus.

  A third invention is the solvent gas generator according to the first or second invention, wherein one of a plurality of types of solvent liquid is selected and supplied to the vaporizing means to generate a solvent gas. Is.

  As a result, it is possible to evaluate the processing capacity of the solvent gas processing apparatus main body with solvent gases of a plurality of types of solvent liquids, and to set a wider range of evaluation conditions for the solvent gas processing capacity of the solvent gas processing apparatus main body. be able to.

  According to a fourth invention, in the first or second invention, a solvent gas generator for supplying a plurality of types of solvent liquids simultaneously to the vaporizing means and generating a mixed solvent gas in which the plurality of types of solvent liquids are mixed; It is a thing.

  As a result, it is possible to evaluate the processing capacity of the solvent gas processing apparatus main body with a mixed solvent gas in which a plurality of types of solvent liquids are mixed. Can be set widely.

  According to a fifth aspect of the present invention, in the fourth aspect of the invention, the solvent gas generating device is characterized in that the component ratio of each of the plurality of types of solvent liquids can be adjusted.

  As a result, it is possible to evaluate the processing capacity of the solvent gas processing apparatus main body with solvent gases of various component ratios of a plurality of types of solvent liquids, and the evaluation conditions of the processing capacity of the solvent gas in the solvent gas processing apparatus main body Can be set more widely.

  A sixth invention is characterized in that, in any one of the first to fifth inventions, the concentration of the solvent gas in the diluted solvent gas is changed within a predetermined time, and the diluted solvent gas is supplied to the main body of the solvent gas processing apparatus. This is a solvent gas generator.

  This makes it possible to evaluate the processing capacity of the solvent gas processing apparatus main body due to a change in the concentration of the solvent gas within a predetermined time, and to set a wider range of evaluation conditions for the solvent gas processing capacity in the solvent gas processing apparatus main body. be able to.

  A seventh invention is directed to the solvent liquid vaporization means in any one of the first to sixth inventions, so that the concentration of the solvent gas in the diluted solvent gas obtained by mixing the solvent gas and air is not more than the lower limit of the explosion limit. The solvent gas generation device is characterized in that the supply amount of dilute gas or the supply amount of dilution gas is controlled.

  Accordingly, the diluted solvent gas can be supplied to the solvent gas processing apparatus main body while always maintaining a safe state.

  An eighth invention is a solvent gas generator characterized in that in any one of the first to seventh inventions, temperature adjusting means for detecting the temperature of the diluted solvent gas and controlling it to a predetermined temperature is provided. is there.

  As a result, it is possible to evaluate the processing capacity of the solvent gas processing apparatus main body in response to temperature changes, and it is possible to set a wider range of conditions for evaluating the solvent gas processing capacity of the solvent gas processing apparatus main body. .

  According to a ninth aspect of the present invention, the solvent gas generator, a solvent gas processing apparatus main body for processing a gas to be processed containing a volatile organic compound, and a solvent liquid by heating and vaporizing a solvent liquid of the volatile organic compound to form a solvent gas, A solvent gas generator for generating a diluted solvent gas mixed with the solvent gas and a diluent gas; a gas supply line for supplying a gas to be processed containing a volatile organic compound to a solvent gas processor body; and a solvent gas generator. A dilution solvent gas supply line for supplying the diluted solvent gas generated in step 1 to the solvent gas processing apparatus main body, and supplying the gas to be processed and the diluted solvent gas generated in the solvent gas generation apparatus to the solvent gas processing apparatus main body The operation of evaluating the solvent gas processing capacity of the main body of the solvent gas processing apparatus by supplying the diluted solvent gas generated by the solvent gas generating apparatus and the above-mentioned processing by supplying the gas to be processed It was possible to perform processing operation of the gas is obtained by the solvent gas treatment apparatus according to claim.

  As a result, there is no fluctuation (variation) in the solvent gas concentration in a short time, and furthermore, the amount of the diluted solvent gas or the solvent gas concentration in the diluted solvent gas is arbitrarily changed to various conditions to An evaluation of the processing capacity can be performed. Therefore, it is possible to always evaluate the processing ability of the volatile organic compound accurately and stably.

  According to a tenth aspect, in the ninth aspect, a calibration gas supply line not including a solvent gas is provided, and the zero calibration operation of the main body of the solvent gas processing apparatus by supplying the calibration gas can be performed. The solvent gas treatment device is as follows.

  Thereby, the measurement accuracy of the solvent gas concentration meter can be improved by supplying the calibration gas. Further, once the residual solvent gas in the main body of the solvent gas processing apparatus is driven out, it is possible to grasp the processing capacity by the diluted solvent gas from the solvent gas generating apparatus with higher accuracy.

  In an eleventh aspect of the invention, the solvent gas generator, a solvent gas processing apparatus main body for processing a gas to be processed containing a volatile organic compound, and a solvent liquid by heating and evaporating a solvent liquid of the volatile organic compound, A solvent gas generator for generating a diluted solvent gas mixed with the solvent gas and a diluent gas; a gas supply line for supplying a gas to be processed containing a volatile organic compound to a solvent gas processor body; and a solvent gas generator. A dilution solvent gas supply line for supplying the diluted solvent gas generated in step 1 to the solvent gas processing apparatus main body, and supplying the gas to be processed and the diluted solvent gas generated in the solvent gas generation apparatus to the solvent gas processing apparatus main body The operation of evaluating the solvent gas processing capacity of the main body of the solvent gas processing apparatus by supplying the diluted solvent gas generated by the solvent gas generating apparatus, and the above-mentioned target by supplying the gas to be processed It is possible to perform a processing operation of a physical gas, and after supplying a diluted solvent gas from a solvent gas generator and performing an evaluation operation of the solvent gas processing capacity of the main body of the solvent gas processing device, supplying a gas to be processed The method for operating the solvent gas processing apparatus is characterized in that the processing operation of the gas to be processed is performed.

  As a result, there is no fluctuation (variation) in the solvent gas concentration in a short time, and furthermore, the amount of the diluted solvent gas or the solvent gas concentration in the diluted solvent gas is arbitrarily changed to various conditions to An evaluation of the processing capacity can be performed. Therefore, it is possible to always evaluate the processing ability of the volatile organic compound accurately and stably.

  In a twelfth aspect of the invention according to the eleventh aspect, a calibration gas supply line not including a solvent gas is provided, and the calibration operation of the solvent gas processing apparatus main body can be performed by supplying a calibration gas. An operation method for a solvent gas processing apparatus, comprising: supplying gas to a solvent gas processing apparatus main body; then supplying solvent gas from the solvent gas generating apparatus to perform an evaluation operation of the processing capacity of the solvent gas processing apparatus main body; and It is a thing.

  Thereby, the measurement accuracy of the solvent gas concentration meter can be improved by supplying the calibration gas. Further, once the residual solvent gas in the main body of the solvent gas processing apparatus is driven out, it is possible to grasp the processing capacity by the diluted solvent gas from the solvent gas generating apparatus with higher accuracy.

  Hereinafter, a solvent gas processing apparatus according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a basic configuration diagram of a solvent gas processing apparatus according to an embodiment of the present invention, FIG. 2 is a basic configuration diagram of a solvent liquid supply unit and a vaporization mixing unit, and FIG. 3 is a vaporization mixing unit. FIG. 4A and FIG. 4B are graphs showing examples of supply of solvent gas from the solvent gas generator, and FIG. 5 is a basic configuration showing an example of the solvent gas processing apparatus main body. FIG. 6 and FIG. 6 are basic configuration diagrams of another example of the solvent gas processing apparatus main body.

  First, the basic configuration of the solvent gas generator 100 and the solvent gas processing apparatus according to an embodiment of the present invention will be described. The solvent gas generator 100 mainly includes a solvent liquid supply unit 101 and a vaporization mixing unit 120. The solvent liquid supply unit 101 includes a tank 102, a tank 103, and a tank 104 that store different solvent liquids, and a tank 105 that mixes and stores a plurality of solvent liquids at a predetermined ratio. Examples of the solvent liquid include volatile organic compounds such as toluene, xylene, ethyl acetate, and butyl acetate. The volatile organic compound is not limited to this.

  Also, the supply pipes 106, 107, 108, 109 are connected to the tanks 102, 103, 104, 105, respectively. Furthermore, flow meters 110, 111, 112, 113 and on-off valves 114, 115, 116, 117 are arranged in the supply pipes 106, 107, 108, 109, respectively.

  The other end of each supply pipe 106, 107, 108, 109 is connected to a pump (solvent liquid supply means) 118. A discharge pipe 119 is connected to the discharge side of the pump 118, and the discharge pipe 119 is connected to the vaporization pipe 121 of the vaporization mixing unit 120. Further, the supply amount of the solvent liquid of the pump 118 can be adjusted by controlling the pump 118 by the solvent liquid supply amount control means 118a.

  The vaporizing and mixing unit 120 serving as a vaporizing unit includes a vaporizing tube 121 having one end opened, and an electric heater 122 (heating unit) attached to the outer peripheral surface of the vaporizing tube 121. The temperature of the vaporizing pipe 121 is adjusted by temperature adjusting means 122a that detects the temperature of the vaporizing pipe 121 and controls it to a predetermined temperature.

  The vaporization passage 123 of the vaporization pipe 121 is filled with a vaporization promoting body 124 in order to improve the uniform flow and permeability of the solvent liquid flowing in from the discharge pipe 119. The vaporization promoting body 124 is composed of, for example, a metal fiber material made of a thin wire, a metal foam material having connectivity, or the like.

  A waste liquid pipe 125 for solvent liquid is connected to the lower part of the vaporization pipe 121, and an open / close valve 126 is provided here.

  The outlet pipe 127 is fixed in a direction orthogonal to the vaporizing passage 123 of the vaporizing pipe 121, and the inside of the outlet pipe 127 is electrically connected to the vaporizing passage 123. Further, a nozzle body 128 having a nozzle hole 129 is fixed to the vaporizing tube 121.

  An electromagnetic solenoid 130 (driving means) is provided on the side of the lead-out pipe 127 facing the nozzle body 128, and the needle 131 is configured to move in the axial direction by the electromagnetic solenoid 130. On the side of the needle 131 facing the electromagnetic solenoid 130, a tapered portion 132 and a tip portion 133 having a diameter that can be inserted into the nozzle hole 129 are formed.

  Further, on the nozzle body 128 side, a rectifying plate 135 having a plurality of small holes 135 a formed so as to surround the nozzle body 128 is provided. The blowing cylinder 134 is connected to the discharge side of the blower A 136 (dilution gas supply means), and further connected to a discharge cylinder 137 and a dilution solvent gas supply line 138 in which the discharge cylinder 137 and the opening / closing valve 139 are arranged. Yes.

  Furthermore, the supply amount of air (dilution gas) by the blower A136 is configured to be adjusted by a dilution gas supply amount control means 136a that controls the rotational speed of the motor included in the blower A136. In addition, an electric heater 140 (heating means) is provided in the discharge cylinder 137, and the solvent gas passing through the discharge cylinder 137 and air are mixed by the temperature adjusting means 140a that detects the temperature of the diluted solvent gas and controls it to a predetermined temperature. The temperature of the diluted solvent gas is adjusted. Although the electric heater 140 is provided, a means for heating and cooling the diluted solvent gas may be provided. In this case, the temperature of the diluted solvent gas can be adjusted more widely, and the evaluation conditions for the solvent gas processing capacity in the solvent gas processing apparatus main body 200 can be set more widely.

  A flow meter 201 and a solvent gas concentration meter 202 are provided on the inlet side of the calibration gas, the diluted solvent gas, and the gas to be processed of the solvent gas processing apparatus main body 200, and on the outlet side of the solvent gas processing apparatus main body 200. A solvent gas concentration meter 203 is provided.

  Although the solvent gas processing apparatus main body 200 does not limit the solvent gas processing system in the present invention, representative apparatuses are shown in FIGS. 5 and 6 as examples. The basic structure shown in FIG. 6 is a catalytic oxidation type solvent gas processing apparatus main body, which is provided with a honeycomb-shaped catalyst body 205 and an electric heater 206 (heating means) that is disposed close to and heats the catalyst body 205. Is. This method can decompose the solvent gas at a lower temperature using an oxidation catalyst.

  Further, the basic configuration shown in FIG. 5 is a combustion heat storage type solvent gas processing apparatus main body, which is a burner 251, honeycomb-shaped heat storage materials 252 a and 252 b that store heat by combustion of the burner 251, a flow path switching unit 253, and a connection member. 254a and 254b are provided. In this method, the solvent gas can be decomposed by the combustion heat of the burner 251 and the high-temperature heat storage materials 252a and 252b.

  In FIG. 1, a gas supply line 300 to be processed in which an on-off valve 302 is disposed is connected to the inlet side of the solvent gas processing apparatus main body 200, and the gas to be processed and the calibration gas to be purified by the blower B301 are supplied to the solvent gas processing apparatus main body. 200.

  Further, a calibration gas supply line 400 in which an on-off valve 401 is arranged is connected to the gas supply line 300 to be processed on the suction side of the blower B301.

  Next, the basic operation of the solvent gas processing device and the solvent gas generator will be described. First, an operation of supplying a predetermined amount of calibration gas not containing solvent gas to the solvent gas processing apparatus main body 200 will be described. During this operation, the solvent gas processing device main body 200, the flow meter 201, and the solvent gas concentration meter 202 are in an operating state, the on-off valves 139 and 302 are closed, and the operation of the vaporizing and mixing unit 120 is stopped, and the blower B301 is operated. Then, a predetermined amount of calibration gas not containing the solvent gas is supplied to the solvent gas processing apparatus main body 200.

  The calibration gas enters the solvent gas processing apparatus main body 200 through the gas supply line 300 to be processed, the flow meter 201, and the solvent gas concentration meter 202, and is discharged through the solvent gas concentration meter 203 on the outlet side.

  By supplying the calibration gas, the zero point of the solvent gas concentration meters 202 and 203 is calibrated, and the measurement accuracy can be improved. Further, the residual solvent gas before the supply of the calibration gas staying in the solvent gas processing apparatus main body 200 is once discharged, and the zero point of the solvent gas concentration meter 203 on the outlet side can be calibrated more reliably. Further, once the residual solvent gas in the solvent gas processing apparatus main body 200 is driven out, it is possible to grasp the processing capacity of the diluted solvent gas from the solvent gas generating apparatus 100 with higher accuracy.

  The operation of supplying the calibration gas not containing the solvent gas to the solvent gas processing apparatus main body 200 is performed for a predetermined time, the operation of the blower B301 is stopped, and the on-off valve 302 is closed to complete the calibration step.

  Next, the operation of the solvent gas generator 100 after the calibration step is completed will be described.

  First, as shown in FIG. 3, the electromagnetic solenoid 130 is deenergized. At this time, the needle 131 is pressed against the nozzle hole 129 by a coil spring (not shown) included in the electromagnetic solenoid 130, and the distal end portion 133 is in the nozzle hole 129. The taper portion 132 is inserted into the nozzle hole 129 and closes the nozzle hole 129.

  In this state, the electric heater (heating means) 122 is energized, and the vaporizing pipe 121 and the vaporizing passage 123 are preheated to about 120 ° C., for example. At this time, the outlet pipe 127 and the nozzle body 128 are also preheated to substantially the same temperature level by the conduction heat from the vaporization pipe 121.

  After the preheating operation described above, the blower A136 is driven, air in the atmosphere not containing solvent gas is supplied into the blower tube 134, and is ejected from the plurality of small holes 135a of the rectifying plate 135 to the vicinity of the nozzle body 128. .

  After the drive of the blower A136 is started, the electromagnetic solenoid 130 is energized as shown in FIG. 4, and at this time, the needle 131 is attracted to the electromagnetic solenoid 130 side against the coil spring (not shown) of the electromagnetic solenoid 130, and the nozzle hole At the same time that the tip 133 is removed from the nozzle 129, the tapered portion 132 is separated from the nozzle hole 129, thereby opening the nozzle hole 129. The on-off valve 139 is opened.

  Next, the pump 118 is driven, for example, the on-off valve 114 is opened, the other on-off valves 115, 116, 117 are closed, the solvent liquid in the tank 102 is sucked into the supply pipe 106, and is discharged through the discharge pipe 119. The vaporization passage 123 of the vaporization pipe 121 is supplied at a predetermined pressure. This solvent liquid comes into contact with the vaporizing pipe 121 and the vaporization promoting body 124 and is instantly vaporized, enters the outlet pipe 127 as a solvent gas, and jets out of the nozzle hole 129 vigorously.

  The solvent gas ejected from the nozzle hole 129 is uniformly mixed with the air that is the diluted gas ejected from the plurality of small holes 135a of the rectifying plate 135, becomes a diluted solvent gas, becomes the discharge cylinder 137, and the diluted solvent gas supply line 138. And is supplied to the solvent gas processing apparatus main body 200 via the gas to perform purification treatment.

  At this time, the flow rate of the diluted solvent gas by the flow meter 201 and the concentration of the solvent gas in the diluted solvent gas by the solvent gas concentration meter 202 are measured on the inlet side of the solvent gas processing apparatus main body 200. Further, the solvent gas component in the diluted solvent gas is purified by the solvent gas processing apparatus main body 200 and discharged from the purified air discharge line. At this time, the solvent gas concentration meter 203 measures the concentration of the solvent gas in the purified air.

  The solvent gas concentration measured by the solvent gas concentration meter 203 is purified to a predetermined value or less under conditions such as the amount of diluted solvent gas supplied from the solvent gas generating device 100 to the solvent gas processing device main body 200 and the solvent gas concentration. And the basic evaluation of the processing capability of the solvent gas processing apparatus main body 200 is performed from the difference in solvent gas concentration between the solvent gas concentration meter 202 and the solvent gas concentration meter 203.

  After the basic evaluation of the processing capability of the solvent gas processing apparatus main body 200, the driving of the pump 118 is stopped and the electric heater (heating means) 122 and the electromagnetic solenoid 130 are de-energized. By de-energizing the electromagnetic solenoid 130, the needle 131 is pressed toward the nozzle hole 129, the tip end portion 133 is inserted into the nozzle hole 129, and the tapered portion 132 hits the nozzle hole 129 to close the nozzle hole 129. , Stop the ejection of solvent gas instantly.

  After the above-described operation, the blower A 136 is continuously driven for a predetermined time (for example, approximately 30 seconds), air in the atmosphere is supplied into the blower cylinder 134, and the solvent gas is passed through the flow path leading to the diluted solvent gas supply line 138. Replace with free air. Thereafter, the drive of the blower A136 is stopped and the on-off valve 139 is closed.

  Next, the on-off valve 302 is opened, the blower B301 is driven, and the air to be processed (the gas to be processed) containing the solvent gas from the source of the solvent gas is supplied through the gas supply line 300 to the solvent gas processing apparatus main body. Switch to supply to 200. Thereby, the purification treatment of the air to be treated containing the solvent gas is started. At this time, the flow rate of the air to be processed by the flow meter 201 and the concentration of the solvent gas in the air to be processed by the solvent gas concentration meter 202 are measured on the inlet side of the solvent gas processing apparatus main body 200.

  Further, the solvent gas component in the air to be treated is purified by the solvent gas processing apparatus main body 200 and discharged from the purified air discharge line. At this time, the solvent gas concentration meter 203 measures the concentration of the solvent gas in the purified air.

  The solvent gas concentration measured by the solvent gas concentration meter 203 is purified to a predetermined value or less under conditions such as the amount of air to be treated supplied from the solvent gas generation source to the solvent gas processing apparatus main body 200 and the solvent gas concentration. And a basic confirmation of the processing capacity of the solvent gas processing apparatus main body 200 from the difference in solvent gas concentration between the solvent gas concentration meter 202 and the solvent gas concentration meter 203.

  The overall control of the solvent gas processing apparatus is performed by an operation unit, a notifying unit, and a control device (not shown), a calibration gas supply operation, a solvent gas generator 100 dilution solvent gas supply operation, and a gas to be processed supply operation. Switching control, selection of the solvent liquid in the solvent gas generator 100, setting of the concentration in the diluted solvent gas, and the like, and further the solvent gas from the solvent gas concentration difference between the solvent gas concentration meter 202 and the solvent gas concentration meter 203 Data processing of the processing capability (purification degree or the like) of the processing apparatus main body 200 and notification by storage, display, voice, or the like are performed.

  The solvent gas processing apparatus main body zero calibration operation by supplying calibration gas, and the solvent gas processing apparatus 200 evaluation performance of the solvent gas processing apparatus main body 200 by supplying diluted solvent gas generated by the solvent gas generating apparatus 100 are solvent gas. It can be appropriately performed at the start of operation of the processing apparatus main body 200, at the time of operation stop, at the time of maintenance, or the like.

  Next, a method for setting conditions such as the amount of diluted solvent gas supplied from the solvent gas generator 100 to the solvent gas processing apparatus main body 200 and the solvent gas concentration will be described.

  First, a method of supplying a plurality of solvent liquids to a solvent gas processing apparatus main body 200 of a diluted solvent gas containing the solvent gas of the selected solvent liquid will be described. As described above, in the description of the basic operation, the on-off valve 114 is opened, the other on-off valves 115, 116, 117 are closed, and the solvent liquid in the tank 102 is sucked into the supply pipe 106 by the pump 118 and discharged. Supplying at a predetermined pressure to the vaporizing passage 123 of the vaporizing pipe 121 via the pipe 119, the solvent gas of the solvent liquid in the tank 102 was generated. Further, the on-off valves 114, respectively corresponding to the tanks 102, 103, 104, 115 or 116 is opened and the other is closed, so that any one of the solvent liquids in the opened tank is selected and vaporized, and the diluted solvent containing the solvent gas of the selected solvent liquid The gas can be supplied to the solvent gas processing apparatus main body 200.

  Further, by opening any two of the on-off valves 114, 115, and 116 corresponding to the tanks 102, 103, and 104 and closing the other, respectively, the solvent liquid in the two opened tanks is changed to any two. One can be selected and vaporized, and the diluted solvent gas containing the solvent gas of the selected solvent liquid can be supplied to the solvent gas processing apparatus main body 200. Furthermore, by the same means, any three of the solvent liquids can be selected and vaporized, and the diluted solvent gas containing the solvent gas of the selected solvent liquid can be supplied to the solvent gas processing apparatus main body 200.

  Further, the on-off valves 114, 115, and 116 are flow rate control valves including closing, so that a mixing ratio of a plurality of solvent liquids can be arbitrarily selected and vaporized, and a diluted solvent gas containing a solvent gas having an arbitrary mixing ratio is used. Can be supplied to the main body 200 of the solvent gas processing apparatus.

  In addition, a tank 105 for storing a mixture of a plurality of solvent solutions in advance at a predetermined ratio is stored, and the mixed solvent solution is selected and vaporized, and the selected solvent solution is diluted with a solvent gas. The solvent gas can be supplied to the solvent gas processing apparatus main body 200.

  Further, the concentration of the solvent gas in the diluted solvent gas containing the solvent gas of the vaporized solvent liquid can be set by adjusting the supply amount of the diluted gas by the blower A136 and / or the supply amount of the solvent liquid by the pump 118. .

  When the supply amount of the dilution gas by the blower A136 is constant, it can be set by adjusting the supply amount of the solvent liquid by the pump 118. In addition, when the supply amount of the solvent liquid by the pump 118 is constant, it can be set by adjusting the supply amount of the dilution gas by the blower A136. Further, it can be set by adjusting the supply amount of the dilution gas by the blower A136 and the supply amount of the solvent liquid by the pump 118. Thus, the amount of the diluted solvent gas and the solvent gas concentration in the diluted solvent gas can be arbitrarily changed.

  The amount of the diluted solvent gas and the solvent gas concentration in the diluted solvent gas can be arbitrarily set by controlling the rate at which the diluted gas supply amount by the blower A136 and the solvent liquid supply amount by the pump 118 are changed. . Furthermore, the selection of the solvent liquid to be vaporized can be switched almost instantaneously by opening / closing control of the on-off valves 114, 115, 116, 117.

  (A) shown in FIG. 4 changes the solvent gas concentration in the diluting solvent gas in a stepless increase or decrease direction, and (b) changes the solvent gas concentration in the diluting solvent gas stepwise. An example of supplying to the solvent gas processing apparatus main body 200 will be shown.

  Further, the supply amount of the solvent liquid to the vaporizing means or the supply amount of the dilution gas is controlled so that the concentration of the solvent gas in the diluted solvent gas mixed with the solvent gas and air is not more than the lower limit of the explosion limit. .

  Further, when the solvent gas concentration meter 202 detects a concentration not less than the lower limit value of the explosion limit of the solvent gas, the supply amount of the solvent liquid to the vaporization means is decreased below the lower limit value of the explosion limit of the solvent gas, or You may make it stop supply to the vaporization means of a solvent liquid. In this case, safety can be further improved.

  Further, a dilution gas supply amount detection means (not shown) is provided, and when the dilution gas supply amount detection means detects a supply amount of dilution gas below a predetermined value, supply of the solvent liquid to the vaporization means is stopped. You may do it. In this case, it is possible to further improve the safety that the blower A136 can be placed when the blower A136 is stopped.

  In the solvent gas generator configured as shown in FIGS. 2 and 3, in particular, a pump (solvent liquid supply means) 118 may be provided for each tank of each solvent liquid.

  The present invention can be applied to a wide range of apparatuses that require purification treatment of various solvent gases.

1 is a basic configuration diagram of a solvent gas processing apparatus according to an embodiment of the present invention. Basic configuration diagram of solvent liquid supply unit and vaporization mixing unit of solvent gas generator Configuration diagram of the vaporization mixing unit when the nozzle hole is closed (A), (b) The graph which shows the example of solvent gas supply from a solvent gas generator Basic configuration diagram showing an example of a solvent gas treatment device body Basic configuration diagram of another example of the solvent gas treatment device main body

DESCRIPTION OF SYMBOLS 100 Solvent gas generator 101 Solvent liquid supply part 102 Tank 103 Tank 104 Tank 105 Tank 106 Supply pipe 107 Supply pipe 108 Supply pipe 109 Supply pipe 110 Flowmeter 111 Flowmeter 112 Flowmeter 113 Flowmeter 114 Open / close valve 115 Open / close valve 116 Open / close Valve 117 On-off valve 118 Pump (solvent liquid supply means)
118a Solvent liquid supply control means 119 Discharge pipe 120 Vapor mixing section (vaporization means)
121 Vaporizer (vaporizer)
122 Electric heater (heating means)
122a Temperature adjusting means 123 Vaporization passage 124 Vaporization promoting body 125 Waste liquid pipe 126 Opening and closing valve 127 Deriving pipe 128 Nozzle body 129 Nozzle hole 130 Electromagnetic solenoid (drive means)
131 Needle 132 Tapered part 133 Tip part 134 Blower cylinder 135 Current plate 135a Small hole 136 Blower A (dilution gas supply means)
136a Diluted gas supply amount control means 137 Discharge cylinder 138 Diluted solvent gas supply line 139 On-off valve 140 Electric heater (heating means)
140a Temperature control means 200 Solvent gas processing apparatus main body 201 Flow meter 202 Solvent gas concentration meter 203 Solvent gas concentration meter 204 Catalytic oxidation type solvent gas processing apparatus main body 205 Catalyst body 206 Electric heater (heating means)
250 Combustion heat storage type solvent gas processing device main body 251 Burner 252a Heat storage material 252b Heat storage material 253 Flow path switching unit 254a Connection member 254b Connection member 300 Processed gas supply line 301 Blower B
302 On-off valve 400 Calibration gas supply line 401 On-off valve

Claims (12)

A solvent gas generator for supplying a solvent gas obtained by heating and vaporizing a solvent solution of a volatile organic compound for use in an operation for evaluating a processing capacity of a solvent gas processing apparatus for processing a gas to be treated containing a volatile organic compound. A tank for storing the solvent liquid of the organic compound, a pump for sucking and discharging the solvent liquid from the tank, a vaporization tube for heating and vaporizing the solvent liquid supplied by the pump as a solvent gas, and heating for heating the vaporization pipe Means, temperature adjusting means for detecting the temperature of the vaporizing tube and controlling it to a predetermined temperature, a nozzle hole having a jet port for ejecting the solvent gas vaporized in the vaporizing tube, and a needle for opening and closing the nozzle hole is driven And a diluent gas supply means for supplying a diluent gas to be mixed with the solvent gas, and the solvent liquid is supplied to the vaporization tube heated by the heating means by a pump. The solvent gas is heated to vaporize, the needle is driven to open the nozzle hole, and the solvent gas is ejected. The solvent gas ejected from the nozzle hole is mixed with a diluent gas to obtain a diluted solvent gas. A solvent gas generator characterized by supplying gas to a solvent gas processing device. The concentration of the solvent gas in the dilution solvent gas can be adjusted by controlling the supply amount of the solvent liquid to the vaporization pipe by the pump and / or the supply amount of the dilution gas by the supply means of the dilution gas, The solvent gas generator according to claim 1, wherein the solvent gas generator is supplied to a gas processing apparatus main body. 3. The solvent gas generator according to claim 1 or 2, wherein any one of a plurality of types of solvent liquid is selected and supplied to a vaporizing tube to generate a solvent gas. The solvent gas generator according to claim 1 or 2, wherein a plurality of types of solvent liquids are simultaneously supplied to a vaporizing tube to generate a mixed solvent gas in which the plurality of types of solvent liquids are mixed. 5. The solvent gas generator according to claim 4, wherein a component ratio of each solvent gas of the plurality of types of solvent liquids is adjustable. 6. The solvent gas generation according to claim 1, wherein the concentration of the solvent gas in the diluted solvent gas is changed within a predetermined time and the diluted solvent gas is supplied to the main body of the solvent gas processing apparatus. apparatus. The supply amount of the solvent liquid to the vaporization pipe or the supply amount of the dilution gas is controlled so that the concentration of the solvent gas in the diluted solvent gas mixed with the solvent gas and air is not more than the lower limit of the explosion limit. The solvent gas generator of any one of Claims 1-6. The solvent gas generator according to any one of claims 1 to 7, further comprising temperature adjusting means for detecting the temperature of the diluted solvent gas and controlling the temperature to a predetermined temperature. The solvent gas generator according to any one of claims 1 to 8, a solvent gas processing apparatus main body for processing a gas to be processed containing a volatile organic compound, and a solvent gas processing apparatus for a gas to be processed containing a volatile organic compound A diluted solvent gas generated by the gas to be treated and the solvent gas generator, comprising: a supply line to the main body; and a supply line to the solvent gas processing apparatus body of the diluted solvent gas generated by the solvent gas generator Supply to the main body of the solvent gas processing apparatus can be selected, and the operation of evaluating the solvent gas processing capacity of the main body of the solvent gas processing apparatus by supplying the diluted solvent gas generated by the solvent gas generating apparatus and the supply of the gas to be processed A solvent gas processing apparatus characterized in that a processing operation of the gas to be processed can be performed. 10. The solvent gas processing apparatus according to claim 9, wherein the solvent gas processing apparatus main body can be calibrated by supplying a calibration gas that does not contain a solvent gas. The solvent gas generator according to any one of claims 1 to 8, a solvent gas processing apparatus main body for processing a gas to be processed containing a volatile organic compound, and a solvent gas processing apparatus for a gas to be processed containing a volatile organic compound A supply line to the main body, and a supply line to the solvent gas processing apparatus main body of the diluted solvent gas generated by the solvent gas generator, and the diluted gas generated by the gas to be processed and the solvent gas generator The supply to the solvent gas processing apparatus main body can be selected, the operation for evaluating the processing capacity of the solvent gas processing apparatus main body by supplying the diluted solvent gas generated by the solvent gas generating apparatus, and the gas to be processed by supplying the gas to be processed Gas gas to be treated, after supplying a diluted solvent gas from the solvent gas generator and evaluating the solvent gas processing capacity of the solvent gas processor main body. How the operation of the solvent gas treatment apparatus, which comprises carrying out the processing operation of the gas to be treated by the supply. It is equipped with a calibration gas supply line that does not contain solvent gas, and it is possible to perform calibration operation of the solvent gas processing apparatus main body by supplying calibration gas, and after supplying the calibration gas to the solvent gas processing apparatus main body, 12. The method for operating a solvent gas processing apparatus according to claim 11, wherein the solvent gas is supplied from the solvent gas generating apparatus and the operation for evaluating the processing capacity of the main body of the solvent gas processing apparatus is performed.

Images