JP4616091B2 - Rotary gas adsorption concentrator - Google Patents

Description

  The present invention relates to a rotary gas adsorption concentrating apparatus, and in particular, adsorbs and concentrates a gas containing a high-boiling organic gas (hereinafter referred to as VOC).

The rotary gas adsorption concentrator is used for the concentration of VOCs in the air. In other words, a large amount of VOC, which is a solvent for paints and inks, is released from paint factories and printing factories, and in order to burn and detoxify these VOCs, it is necessary to concentrate them to a concentration at which VOCs self-combust.
For this reason, a rotary gas adsorption concentrating apparatus using a honeycomb (honeycomb) rotor carrying an adsorbent is rapidly spreading. The rotary gas adsorption concentrator uses a honeycomb-shaped rotor carrying an adsorbent as described above, divides the honeycomb-shaped rotor into at least an adsorption zone and a desorption zone, and flows air to be treated containing VOC into the adsorption zone. In the desorption zone, high-temperature desorption air is allowed to flow in order to desorb the VOC adsorbed by the honeycomb rotor.
Such a rotary gas adsorption and concentrating apparatus is required to be developed for various VOCs containing high-boiling substances. An example of such a technique is disclosed in Patent Document 1.
JP 2004-130189 A

  The one disclosed in Patent Document 1 has a seal made of a non-combustible material such as mica, and a groove is provided on the contact surface with the honeycomb-shaped rotor. As a result, for example, desorption air having a temperature of 300 ° C. can be flowed to the desorption zone, and high-boiling VOCs can be processed.

  However, the demand for VOC removal has gradually become stricter, and installation of a VOC processing apparatus has been required in many industries, and a cheaper and more productive VOC processing apparatus has been required. The thing of patent document 1 is preventing the leak of high temperature desorption air by using expensive mica for a seal | sticker.

  The present invention is a general and inexpensive material such as stainless steel, which can be activated by using high-temperature desorption air of about 300 ° C., and further can prevent leakage of high-temperature desorption air. An attempt is made to provide a concentrator.

  In order to solve the above-mentioned problems, the present invention has a honeycomb-shaped rotor that is rotationally driven and carries an adsorbent, and has elasticity as a seal that divides the honeycomb-shaped rotor into at least a desorption zone and an adsorption zone. A plurality of plate-like members spaced apart from each other to provide an elastic seal that contacts the rotor and a heat-resistant seal made of a material that has higher heat resistance than the elastic seal, and the heat-resistant seal prevents high-temperature gas from going to the elastic seal due to the labyrinth effect Because of the labyrinth effect of the heat-resistant seal, high temperature gas is prevented from going to the elastic seal.

  Since the rotary gas adsorption concentrator of the present invention is configured as described above, even if a high-boiling substance adheres to the honeycomb-shaped rotor, it can be desorbed by high-temperature desorption air. When the desorption air leaks through the high temperature seal, the leak can be completely stopped by the elastic seal. Moreover, since the high temperature desorption air is not in direct contact with the elastic seal, the elastic seal is not deteriorated by the heat of the desorption air.

  For this reason, even a rare gas containing a high-boiling VOC can be adsorbed and concentrated, and a harmful gas can be treated even under conditions in which treatment has been difficult.

  Furthermore, since heat resistant seals have higher heat resistance than elastic seals and can be any material that can withstand the desorption temperature, inexpensive materials can be used. In particular, the heat-resistant seal can be brought into a non-contact state with a small gap with respect to the honeycomb-shaped rotor, and in this case, a material having low wear resistance such as a fluororesin can be used.

  The invention according to claim 1 of the present invention has a honeycomb-shaped rotor that is rotationally driven and carries an adsorbent, and has elasticity as a seal that divides the honeycomb-shaped rotor into at least a desorption zone and an adsorption zone. An elastic seal in contact with the cylindrical rotor and a heat resistant seal made of a material having higher heat resistance than the elastic seal, and the heat resistant seals are spaced apart from each other so as to prevent high temperature gas from going to the elastic seal by a labyrinth effect. The elastic seal is provided outside the desorption zone from the heat-resistant seal, and the high-temperature desorption air is almost sealed by the heat-resistant seal, and the slightly leaked desorption air is completely removed by the elastic seal. It has the effect | action that it can seal.

  Embodiments of the rotary gas adsorption concentrator of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a cross-sectional view of a seal of the rotary gas adsorption and concentrating device of the present invention and its mounting portion.

  Reference numeral 1 denotes a heat-resistant seal, which includes a spacer 2 made of a heat-resistant material such as stainless steel and seal plates 3 and 4 attached to both sides of the spacer 2. As shown in FIG. 2, each seal plate 3, 4 sandwiches a sheet material 7 having a heat resistance of about 350 ° C. or more such as a fluororesin system and elasticity between a pair of stainless plates 5, 6. The sheet material 7 protrudes downward from the lower ends of the stainless plates 5 and 6. The fluororesin may be a fluororesin sheet, or may be a glass-filled fluororesin sheet to increase the strength.

  The heat-resistant seal 1 composed of the seal plates 3 and 4 and the spacer 2 is fixed to the stay plate 9 by bolts 8, and the stay plate 9 is fixed to the separator 12 by presser plates 10 and bolts 11.

  Here, the separator 12 divides the adsorption zone 14 and the desorption zone 15 of the honeycomb-shaped rotor 13 as shown in FIG. 3, and includes a pair of V-shaped straight separators 16 and 17 and an arc-shaped separator 18. A desorption zone 15 is enclosed. As is generally known, the honeycomb-shaped rotor 13 is formed by forming an inorganic paper in a honeycomb shape and carrying an adsorbent such as hydrophobic zeolite, and is rotated by a geared motor (not shown) or the like. The

  A geared motor is connected to a commercially available speed control device, and the activation operation is performed at a desorption air temperature of about 300 ° C. higher than that when the VOC adsorption / concentration operation is performed at a desorption air temperature of about 180 ° C. The time decreases the rotational speed of the honeycomb-like rotor 13.

  Reference numeral 19 denotes an elastic seal, and an elastic contact plate 21 made of an elastic material having a relatively high heat resistance of about 220 ° C., such as fluororubber, at the lower end of a rectangular tube 20 made of a heat resistant material such as stainless steel and having high wear resistance. Is attached, and the elastic contact plate 21 is in elastic contact with the end face of the honeycomb-shaped rotor 13.

  The rectangular tube 20 and the elastic contact plate 21 are attached to the stay plate 24 by a fixing plate 22 and bolts 23, and the stay plate 24 is attached to the separator 12 by a press plate 25 and bolts 26.

  The relationship between the heat-resistant seal 1 and the elastic seal 19 shown in FIG. 1 is such that the heat-resistant seal 1 is inside the desorption zone 15 so that high-temperature gas enters the direction of the arrow in FIG. Further, with the above structure, the front end of the sheet material 7 may be in contact with the end face of the honeycomb-shaped rotor 3. In this case, the material of the sheet material 7 is selected considering the heat resistance rather than the wear resistance, and there is no problem even if the tip of the sheet material 7 is worn.

The rotary gas adsorption concentrator of the present invention having such a configuration sends the air to be treated to the adsorption zone 14 of the honeycomb rotor 13 while rotating the honeycomb rotor 3. Here, the VOC contained in the air to be treated is adsorbed by the adsorbent of the honeycomb-shaped rotor 13. Then, desorption air at about 180 ° C., for example, is sent to the desorption zone 15 to desorb the VOC adsorbed by the adsorbent.
When the amount of the desorption air is reduced to 1/10 of the amount of the air to be treated, the VOC concentration in the desorption air is concentrated to 10 times the concentration of the air to be treated. For this reason, it becomes easy to process desorption air by combustion or a catalyst.

  When VOC having a high boiling point is included in the VOC contained in the air to be treated, the desorption air at about 180 ° C. is not sufficiently desorbed, and VOC accumulates in the honeycomb rotor 13. In this case, for example, high temperature air of about 300 ° C. is sent to the desorption zone 15 to activate the honeycomb rotor 13.

  When the desorption air passes through the desorption zone 15 and the sheet 7 of the seal plates 3 and 4 of the heat-resistant seal 1 is in contact with the end face of the honeycomb-like rotor 3, the desorption air is blocked by the heat-resistant seal 1 and the elastic seal 19 is not reached.

  When the sheet 7 of the seal plates 3 and 4 has a minute gap without being in contact with the end face of the honeycomb-like rotor 3 after long-term use or from the beginning, the desorption air passes through the heat-resistant seal 1 from the gap. However, the labyrinth effect is generated by the space between the seal plates 3 and 4 during the passage, and the passage resistance is increased.

  Therefore, the amount of air that has passed through the heat-resistant seal 1 is very small, and when the elastic seal 19 is reached, the temperature is lowered. For this reason, the elastic seal 19 withstands heat sufficiently and reliably seals the air that has passed through the heat-resistant seal 1 so as not to leak outside.

  The result of actually measuring the temperature of each part during the above activation operation is shown in FIG. Each temperature in FIG. 4 represents a temperature at a position indicated by (1) to (6) in FIG. As is apparent from FIG. 4, even when desorption air exceeding 300 ° C. is sent, the elastic seal 19 portion, that is, the position (5), is 160 ° C. or less. For this reason, the elastic seal 19 can sufficiently withstand heat.

  In the above example, as an example of the seal plates 3 and 4, a sheet material 7 having a heat resistance and elasticity of about 350 ° C. or more such as a fluororesin system is sandwiched between a pair of stainless plates 5 and 6. It was. In addition to this, any plate that can withstand high temperatures, such as a ceramic plate and a mica plate, can be used instead of the stainless steel plates 5 and 6.

  In addition, a sheet material 7 having a heat resistance and elasticity of about 350 ° C. or more such as a fluororesin type sandwiched between a pair of stainless steel plates 5 and 6 is shown. It may be a thing.

  Further, an example is shown in which the tip of the sheet 7 having elasticity is brought into contact with the end face of the honeycomb-like rotor 13. In this case, the stainless plate need not be a pair.

  The present invention provides a rotary gas adsorption concentrator capable of adsorbing and concentrating even a VOC containing a high boiling point substance.

It is sectional drawing which shows the Example of the rotary gas adsorption concentration apparatus of this invention. It is sectional drawing which shows an example of the seal | sticker used for this invention. It is a perspective view which shows the Example of the rotary gas adsorption concentration apparatus of this invention. It is a graph which shows the temperature of each part in activation operation | movement of the rotary gas adsorption concentrating apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat-resistant seal 2 Spacer 3, 4 Seal plate 5, 6 Stainless plate 7 Sheet material 8 Bolt 9 Stay plate 10 Holding plate 11 Bolt 12 Separator 13 Honeycomb rotor 14 Adsorption zone 15 Desorption zone 16, 17 Straight separator 18 Arc separator 19 Elastic seal 20 Rectangular tube 21 Elastic contact plate 22 Fixing plate 23 Bolt 24 Stay plate 25 Presser plate 26 Bolt

Claims (3)

It has a honeycomb-shaped rotor that is driven to rotate and carries an adsorbent, and has elasticity as a seal that divides the honeycomb-shaped rotor into at least a desorption zone and an adsorption zone, and has an elastic seal that is in contact with the honeycomb-shaped rotor and more heat-resistant than the elastic seal A heat-resistant seal made of a material having high properties, and the heat-resistant seal is composed of a plurality of plate-like members spaced from each other so as to prevent high-temperature gas from going to the elastic seal due to a labyrinth effect. provided from the heat seal outside the desorbing zone, the plate-like member is made of metal plate and the fluorine-based resin sheet, a state where the fluororesin sheet is protruded from the metal plate, preconcentration operation and honeycomb rotor organic gas The activation operation of the honeycomb-shaped rotor is performed in accordance with the organic gas adsorption and concentration operation. The organic gas high temperature of the air than the air sent to the desorbing zone at adsorption concentration operation if the organic matter over data has accumulated to send to the desorbing zone, compared to when performing preconcentration operation of the organic gas Thus, the rotary gas adsorption and concentration apparatus is configured such that the rotational speed of the honeycomb-shaped rotor is lowered during the activation operation. 2. The rotary gas adsorption and concentrating apparatus according to claim 1, wherein the heat-resistant seals are provided on both sides of the base material, and are composed of a plurality of heat-resistant plates that are flatly spaced from each other. The rotary gas adsorption concentrator according to claim 1, wherein the elastic seal is made of fluoro rubber.

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