Device for improving concentration multiple of rotating wheel

Abstract

The utility model discloses a device for improving the concentration multiple of a rotating wheel, which comprises the rotating wheel and a heater, the rotating wheel is divided into four areas, namely an adsorption area, a re-adsorption area, a desorption area and a cooling area; a gas outlet of the cooling area is connected with a gas inlet of the heater, a gas outlet of the heater is connected with a gas inlet of the desorption area, a gas outlet of the desorption area is connected with a gas inlet of the readsorption area, and a gas outlet of the readsorption area is connected with a gas inlet of the cooling area. By additionally arranging the adsorption area on the rotating wheel, the backflow concentrated gas and the original waste gas are prevented from being mixed and entering the adsorption area of the rotating wheel, so that the concentration of the waste gas entering the adsorption area is not increased, and the concentration ratio of the rotating wheel is improved on the premise that the cost and the emission concentration of the rotating wheel are not increased too much.

Description

TECHNICAL FIELD

[0001] The utility model relates to a waste gas treatment device, specifically relates to a device that improves the concentration multiple of a rotating wheel. BACKGROUND

[0002] The concentration rotating wheel is generally applied to the waste gas treatment device with low concentration and large air volume, and the concentration multiple is generally 10-20 times. In some application occasions with low concentration, such as organic waste gas discharged by the optoelectronic semiconductor industry, the concentration of the waste gas before treatment is about 100-200 mg / m 3 At this time, we hope that the concentration multiple of the rotating wheel can be increased to more than 30 times, so as to reduce the capacity of the treatment equipment after concentration and reduce the equipment and operation costs. A common method to increase the concentration multiple is to return part of the concentrated gas to the original waste gas, such as Fig. 1-2 , the structure of the conventional rotating wheel mainly includes a rotating honeycomb adsorber and a fixed frame divided into three zones, namely an adsorption zone, a cooling zone and a desorption zone. The rotating wheel rotates continuously, the adsorption zone slowly adsorbs VOCs, the rotating wheel enters the re-adsorption zone to adsorb high-concentration VOCs, and then enters the desorption zone. The high-temperature gas heats the adsorber in this area to produce a desorption effect. The heated adsorber then enters the cooling zone, and after cooling, it enters the adsorption zone again. The rotating wheel rotates continuously and circulates. Assuming that the concentration of the waste gas before treatment is 150 mg / m 3 , and the exhaust volume is 100,000 m 3 / h, Fig. 1 is a conventional concentration rotating wheel design. The waste gas can be concentrated by 20 times, and the concentration of the waste gas discharged after adsorption by the rotating wheel is about 15 mg / m 3 , and the removal rate is about 90%. Fig. 2 is a rotating wheel with the same specifications, and 50% of the concentrated gas is returned to the original waste gas. Assuming that the removal rate of the rotating wheel adsorption remains 90%, the mass balance calculation result is that the concentrated gas can be concentrated by 40 times, but the concentration of the mixed gas after the return of the gas and the original waste gas increases to 267 mg / m 3 , and the exhaust concentration increases to 27 mg / m 3 . The advantage of this return design is that the same size rotating wheel can increase the concentration multiple of the concentrated gas by one time, but the disadvantage is that the exhaust concentration also increases by nearly one time.

[0003] If the exhaust concentration does not increase, there is a double-rotating-wheel design in the literature, such as documents CN 215085993U, CN114588747 A and CN 210584335 U, as shown in Fig. 3 , the concentration multiple can reach 40 times, and the exhaust concentration after adsorption by two rotating wheels is lower. The advantage of the double-rotating-wheel design is that the concentration multiple is higher and the exhaust concentration is lower; the disadvantage is that the cost of the double-rotating-wheel equipment almost increases by one time. INVENTION CONTENTS

[0004] The device for improving the concentration multiple of a rotating wheel overcomes the shortcomings of the prior art, and improves the concentration multiple of the rotating wheel without increasing the cost of the rotating wheel and the emission concentration.

[0005] To achieve the above object, the technical scheme of the utility model is:

[0006] The device for improving the concentration multiple of a rotating wheel comprises a rotating wheel and a heater.

[0007] The gas outlet of the cooling zone is connected with the gas inlet of the heater, the gas outlet of the heater is connected with the gas inlet of the desorption zone, the gas outlet of the desorption zone is connected with the gas inlet of the resorption zone, and the gas outlet of the resorption zone is connected with the gas inlet of the cooling zone.

[0008] Optionally, a cooler is arranged between the pipeline connecting the gas outlet of the desorption zone and the gas inlet of the resorption zone.

[0009] Optionally, the area of the resorption zone is 5%-15% of the area of the adsorption zone.

[0010] Optionally, the rotating wheel is divided into four zones along the rotating direction, and the zones are sequentially an adsorption zone, a resorption zone, a desorption zone and a cooling zone.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The application sets a resorption zone on the rotating wheel, does not allow the backflow concentrated gas to mix with the original waste gas and enter the adsorption zone of the rotating wheel, so that the concentration of the waste gas entering the adsorption zone is not increased, and the concentration multiple of the rotating wheel is improved without increasing the cost of the rotating wheel and the emission concentration. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a design principle diagram of the existing conventional rotating wheel;

[0014] Fig. 2 It is a design principle diagram of the existing rotating wheel with 50% concentrated gas backflowing to the original waste gas;

[0015] Fig. 3 It is a design principle diagram of the double rotating wheel for improving the concentration multiple;

[0016] Fig. 4 It is a design principle diagram of the device for improving the concentration multiple of the rotating wheel provided by the embodiment of the application;

[0017] Fig. 5 It is a sectional view of the rotating wheel;

[0018] Fig. 6 The working flow chart of the device for improving the concentration ratio of the rotating wheel provided by the embodiment of the present application is shown in the figure.

[0019] Fig. 7 The design principle diagram of the device for improving the concentration ratio of the rotating wheel provided by the preferred embodiment of the present application is shown in the figure.

[0020] In the figure: 1, rotating wheel; 11, adsorption zone; 12, re-adsorption zone; 13, desorption zone; 14, and cooling zone; 2, heater; 3, cooler. DETAILED DESCRIPTION

[0021] Embodiment:

[0022] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0023] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can be a mechanical connection or an electrical connection; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0028] See Fig. 4-5 As shown, the device for increasing the concentration ratio of a rotary concentrator provided in this embodiment mainly includes a rotary wheel 1 and a heater 2. Unlike conventional rotary wheels, the rotary wheel 1 in this embodiment operates along its rotation direction (i.e., Fig. 5 The area is divided into four zones (in the direction of the arrows): adsorption zone 11, re-adsorption zone 12, desorption zone 13, and cooling zone 14. The outlet of cooling zone 14 is connected to the inlet of heater 2; the outlet of heater 2 is connected to the inlet of desorption zone 13; the outlet of desorption zone 13 is connected to the inlet of re-adsorption zone 12; and the outlet of re-adsorption zone 12 is connected to the inlet of cooling zone 14.

[0029] When the device is used to treat waste gas containing VOCs, part of the waste gas enters the adsorption area 11 and part of the waste gas enters the cooling area 14. The concentrated waste gas desorbed from the desorption area is partly returned to the re-adsorption area 12. In this way, high-concentration VOCs are adsorbed on the re-adsorption area 12, and then mixed with the original waste gas and enter the cooling area 14. The re-adsorption area 12 adsorbing high-concentration VOCs is directed to the desorption area 13 along with the rotation of the wheel, and the VOCs are desorbed by using hot air.

[0030] As can be seen, the present application sets a re-adsorption area on the wheel, so that the concentrated gas returned is not mixed with the original waste gas to enter the adsorption area of the wheel, as shown in Fig. 6 Therefore, the concentration of waste gas entering the adsorption area will not increase, and the concentration ratio of the wheel is improved without increasing the cost of the wheel and the emission concentration.

[0031] In a preferred embodiment, the concentrated gas produced by the desorption area has a high temperature, as shown in Fig. 7 Therefore, a cooler 3 is arranged between the gas outlet of the desorption area 13 and the gas inlet of the re-adsorption area 12 to reduce the temperature, so that the high-concentration VOCs are better adsorbed on the re-adsorption area 12, and the cooling effect of the cooling area 1 is improved.

[0032] Specifically, the area of the re-adsorption area 12 is 5%-15% of the area of the adsorption area 11. Because part of the wheel is separated as the re-adsorption area 12, the area of the adsorption area 11 is slightly reduced. However, because the area of the re-adsorption area 12 is only 5%-15% of the area of the adsorption area 11, and in a specific embodiment, the area of the re-adsorption area 12 is 10% of the area of the adsorption area 11, the removal rate of the wheel is not greatly affected.

[0033] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A device for increasing the concentration ratio of a rotating wheel comprising a rotating wheel and a heater, characterized in that, The rotating wheel is divided into four areas, namely, an adsorption area, a re-adsorption area, a desorption area and a cooling area; The gas outlet of the cooling area is connected with the gas inlet of the heater, the gas outlet of the heater is connected with the gas inlet of the desorption area, the gas outlet of the desorption area is connected with the gas inlet of the re-adsorption area, and the gas outlet of the re-adsorption area is connected with the gas inlet of the cooling area.

2. The device for increasing the concentration factor of a runner as claimed in claim 1, wherein, A cooler is arranged between the pipeline connecting the gas outlet of the desorption area with the gas inlet of the re-adsorption area.

3. The device for increasing the concentration factor of a runner as claimed in claim 1, wherein, The area of the re-adsorption area is 5%-15% of the area of the adsorption area.

4. The device for increasing the concentration factor of a runner as claimed in claim 1, wherein, The rotating wheel is divided into four areas along the rotating direction, namely, an adsorption area, a re-adsorption area, a desorption area and a cooling area.

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