Zeolite rotating wheel for treating styrene-containing organic waste gas

Abstract

The utility model belongs to the technical field of environmental protection equipment, and particularly discloses a zeolite rotating wheel for treating styrene-containing organic waste gas. The zeolite rotating wheel comprises an anti-polymerization wheel core, a VOCs wheel core and a connecting shaft; the anti-inhibition wheel core is provided with a porous channel structure penetrating front and back, and an anti-inhibition molecular sieve is loaded on the inner wall of the channel; the VOCs wheel core is attached to the rear portion of the anti-polymerization wheel core and is provided with a porous channel structure penetrating front and back, a zeolite molecular sieve is loaded on the inner wall of the channel, and the connecting shaft penetrates through the anti-polymerization wheel core and the VOCs wheel core to connect the anti-polymerization wheel core and the VOCs wheel core in series and fixedly connect the anti-polymerization wheel core and the VOCs wheel core. According to the device, high-efficiency adsorption and concentration of easily-polymerized styrene components and conventional non-methane hydrocarbon can be realized, the treatment requirements of the industries such as chemical engineering, plastics, printing and coatings on the working condition of waste gas containing styrene and non-methane hydrocarbon are met, the purification effect of styrene-containing organic waste gas is greatly improved, and the service life of equipment is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a zeolite rotor for treating organic waste gas containing styrene. Background Art

[0002] With the rapid development of industries such as chemicals, plastics, printing, and coatings, styrene is widely used as an important chemical raw material. However, during the production process, styrene and other volatile organic compounds are released in a gaseous state, forming waste gas with a pungent odor, posing a serious threat to the environment and human health. Styrene-containing waste gas has the characteristics of low concentration and large air volume. Direct treatment using traditional combustion methods is not only economically expensive, but also difficult to achieve the desired treatment effect. At the same time, the easy polymerization of styrene in the waste gas makes traditional adsorption materials (such as activated carbon or ordinary molecular sieves) prone to polymerization during the adsorption process, resulting in reduced adsorption efficiency and shortened equipment and material life.

[0003] Zeolite rotor technology, with its superior adsorption capacity, high concentration ratio, low operating costs, and wide applicability, has gradually become a preferred solution for treating organic waste gas. Through physical adsorption, the zeolite rotor effectively adsorbs most VOCs (volatile organic compounds) on the rotor surface and desorbs them at an appropriate temperature, thereby purifying and treating the waste gas.

[0004] However, most of the current zeolite rotors have difficulty adsorbing styrene, and styrene is very prone to self-polymerization reactions. The resulting polymers can cause problems such as blockage of the wheel core and pipelines, seriously affecting the waste gas treatment efficiency and the service life of the zeolite rotor. Some environmental protection companies have developed anti-polymerization rotors for styrene, but such rotors have the technical difficulty of being sensitive only to easily polymerizable components such as styrene and insensitive to conventional non-methane hydrocarbon components. This results in poor treatment effects under conditions where industrial waste gas contains both styrene and non-methane hydrocarbons. It is impossible to achieve simultaneous adsorption of styrene and non-methane hydrocarbons through a single rotor device, and the equipment needs to be stacked, increasing investment and operating costs.

[0005] Therefore, it is particularly important to develop an efficient, stable and economical technology for treating organic waste gas containing styrene and non-methane total hydrocarbons. Utility Model Content

[0006] To solve the above problems, the utility model provides a zeolite rotor for treating styrene-containing organic waste gas, which has a simple structure and can simultaneously adsorb styrene and conventional non-methane hydrocarbons in the waste gas, reducing the impact of styrene polymerization on waste gas treatment.

[0007] In order to achieve the above-mentioned purpose, the specific technical solutions adopted by the present utility model are as follows:

[0008] A zeolite rotor for treating styrene-containing organic waste gas, comprising:

[0009] The anti-inhibition wheel core has a porous channel structure that runs through the front and back. The inner wall of the channel is loaded with an anti-inhibition molecular sieve to adsorb the styrene component in the exhaust gas;

[0010] The VOCs wheel core is fitted behind the anti-inhibition polymerization wheel core and has a porous channel structure that runs through the front and back. The inner wall of the channel is loaded with zeolite molecular sieve for adsorbing non-methane total hydrocarbon components in the exhaust gas;

[0011] The connecting shaft is passed through the anti-polymerization wheel core and the VOCs wheel core, connecting the two in series and fixedly connecting the two.

[0012] In the above-mentioned zeolite wheel, the porous channel structure is defined as a wheel core main structure having a large number of channels parallel to the axis of the wheel core, which is used to load the molecular sieve for adsorption and for gas to circulate back and forth. When the organic waste gas circulates through the channels, it comes into contact with the molecular sieve, and the organic matter is adsorbed by it, thereby achieving the purpose of gas purification.

[0013] Preferably, the anti-polymerization wheel core and the VOCs wheel core both include a wheel core skeleton, and the wheel core skeleton includes an inner ring plate, an outer ring plate, and a plurality of partitions connected between the inner surfaces of the inner ring plate and the outer ring plate; the inner ring plate is mounted on the connecting shaft; the partition divides a plurality of fan-shaped areas between the inner ring plate and the outer ring plate, and the porous channel structure includes a plurality of channel modules filled in the fan-shaped areas. Styrene cannot achieve 100% anti-polymerization due to its self-polymerization characteristics. The adsorption material (i.e., the porous channel structure) in the anti-polymerization wheel core needs to be replaced in time to ensure that it maintains a high adsorption efficiency for a long time. Such a structural setting of the wheel core allows the channel module to be disassembled and replaced from the side, reducing the difficulty of replacing the anti-polymerization wheel core, protecting the rear-end VOCs wheel core, and extending the service life of the entire equipment. The VOCs wheel core can also be replaced in the same way.

[0014] Furthermore, the channel module is formed by alternately arranging and interconnecting first and second substrate units made of glass fiber, wherein the first substrate units are planar and the second substrate units are corrugated.

[0015] Preferably, the anti-polymerization wheel core and the VOCs wheel core are driven to rotate by a power device (such as a motor), and the power device is connected to the outer peripheral surface of the outer ring plate through a transmission chain, so that the axis of the wheel core will not deviate when it rotates.

[0016] Preferably, the zeolite wheel for treating styrene-containing organic waste gas further comprises a space area where an anti-inhibition wheel core and a VOCs wheel core are located, and the space area is sequentially divided into an adsorption area, a desorption area and a cooling area along the running direction of the wheel core;

[0017] The adsorption zone is the exhaust gas inlet side on the side of the anti-inhibition wheel core, and the corresponding VOCs wheel core side is the exhaust gas outlet side; the desorption zone is the high-temperature gas inlet side on the side of the VOCs wheel core, and the corresponding anti-inhibition wheel core side is the high-temperature gas outlet side; the cooling zone is the cooling gas inlet side on the side of the anti-inhibition wheel core, and the corresponding VOCs wheel core side is the cooling gas outlet side.

[0018] Preferably, the anti-inhibition molecular sieve is one or more of ZEM-5, HZSM-5, USY, SAPO, MOR, and Beta. These anti-inhibition molecular sieves are high silicon-aluminum ratio molecular sieves with a near-neutral pH, which can minimize the accelerated catalysis of styrene polymerization by a slightly acidic molecular sieve environment and an aluminum-containing molecular sieve environment, thereby reducing the occurrence of polymerization reactions.

[0019] Preferably, the zeolite molecular sieve is one or more of NaY, USY, FAU, and ZSM.

[0020] The utility model has the following beneficial effects:

[0021] 1. By combining the anti-polymerization wheel core with the VOCs wheel core, the adsorption of styrene and non-methane hydrocarbons in the exhaust gas is achieved, avoiding the blockage problem caused by the large-scale polymerization of styrene in the VOCs wheel core and extending its service life.

[0022] 2. The porous channel structure is formed by alternating the corrugated and flat substrate units, which has a higher specific surface area, high load rate, and low resistance, effectively improving the adsorption efficiency; in addition, it is not easy to deform, which increases the service life of the wheel core.

[0023] 3. Through the modular setting of the porous channel structure, the difficulty of replacing the anti-polymerization wheel is reduced, the regular replacement needs are met (the replacement cycle depends on the operating conditions), and the rear-end VOCs wheel core is protected.

[0024] 4. The utility model has a simple structure and low installation and operation costs.

[0025] In summary, the utility model can achieve efficient adsorption and concentration of easily polymerized styrene components and conventional non-methane total hydrocarbons, meet the needs of chemical, plastic, printing, coating and other industries for the treatment of waste gas containing both styrene and non-methane total hydrocarbons, and greatly improve the purification effect of styrene-containing organic waste gas and the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 : Operation flow chart of the zeolite rotor used for treating styrene-containing organic waste gas in Example 1.

[0027] Figure 2 : Schematic diagram of the structure of the wheel core (anti-inhibition wheel core and VOCs wheel core) in the zeolite wheel described in Example 1.

[0028] Figure 3 : A partially enlarged schematic diagram of the porous channel structure in the zeolite wheel described in Example 1.

[0029] In the figure: 1-anti-inhibition wheel core, 2-VOCs wheel core, 3-connecting shaft, 4-adsorption zone, 5-desorption zone, 6-cooling zone, 7-desorption heat source; 11-first substrate unit, 12-second substrate unit, 13-wheel core skeleton; 131-inner ring plate, 132-partition plate, 133-outer ring plate. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] A zeolite rotor for treating styrene-containing organic waste gas, such as Figure 1-3 As shown, it includes an anti-inhibition polymerization wheel core 1, a VOCs wheel core 2 and a connecting shaft 3; the anti-inhibition polymerization wheel core 1 has a porous channel structure that runs through the front and back, and the inner wall of the channel is loaded with anti-inhibition polymerization molecular sieves; the VOCs wheel core 2 is fitted behind the anti-inhibition polymerization wheel core 1, has a porous channel structure that runs through the front and back, and the inner wall of the channel is loaded with zeolite molecular sieves; the connecting shaft 3 is passed through the axis of the anti-inhibition polymerization wheel core 1 and the VOCs wheel core 2, connecting the two in series and fixedly connecting them.

[0033] More specifically, the structures of the anti-polymerization wheel core 1 and the VOCs wheel core 2 are the same, such as Figure 2 As shown, they all include a porous channel structure (gray mesh part) and a wheel core skeleton 13 that supports the porous channel structure. The wheel core skeleton 13 includes an inner ring plate 131, an outer ring plate 133, and a plurality of partitions 132 connected between the inner surfaces of the inner ring plate 131 and the outer ring plate 133; the inner ring plate 131 is mounted on the connecting shaft 3; the partitions 132 divide the inner ring plate 131 and the outer ring plate 133 into a plurality of sector-shaped areas, and the porous channel structure includes a plurality of channel modules filled in the sector-shaped areas. The channel modules can be taken out from the side to realize partial replacement of the wheel core. The channel modules are formed by alternating first substrate units 11 and second substrate units 12 made of glass fiber and bonded to each other ( Figure 3 ), the first substrate unit 11 is planar, and the second substrate unit 12 is corrugated; the molecular sieve is coated on the first substrate unit and the surface of the first substrate unit to form an adsorption coating. In this embodiment, the anti-inhibition molecular sieve is ZEM-5, and the zeolite molecular sieve is NaY.

[0034] The anti-inhibition wheel core 1 and the VOCs wheel core 2 are driven to rotate by a power device, which is a motor. Its output end is connected to the transmission wheel, and the transmission wheel and the outer ring plates 133 of the two wheel cores are connected by a winding transmission chain, thereby realizing the motor driving the wheel core.

[0035] The anti-agglomeration wheel core 1 and the VOCs wheel core 2 are spatially and sequentially divided into an adsorption zone 4, a desorption zone 5, and a cooling zone 6 along the wheel core's direction of rotation. The adsorption zone 4 serves as the exhaust gas inlet on the anti-agglomeration wheel core 1 side, and the exhaust gas outlet on the corresponding VOCs wheel core 2 side. The desorption zone 5 serves as the high-temperature gas inlet on the VOCs wheel core 2 side, and the high-temperature gas outlet on the anti-agglomeration wheel core 1 side. The cooling zone 6 serves as the cooling gas inlet on the anti-agglomeration wheel core 1 side, and the cooling gas outlet on the corresponding VOCs wheel core 2 side. Each part of the rotating wheel core sequentially passes through the adsorption zone 4, desorption zone 5, and cooling zone 6, completing the organic matter adsorption-organic matter desorption-internal cooling cycle.

[0036] The operation process of the zeolite rotor for treating styrene-containing organic waste gas ( Figure 1 ) is as follows: the organic waste gas is introduced into the wheel core adsorption zone 4, and the two wheel cores in the adsorption zone 4 sequentially adsorb styrene and non-methane total hydrocarbon components, and then discharge the purified gas; the desorption zone 5 introduces heated waste gas to sequentially desorb the organic matter intercepted by the two-stage wheel cores, and the desorbed waste gas is sent to the deep treatment equipment for incineration and cracking into CO2 and H2O; the cooling zone 6 cools the two wheel cores whose temperatures rise after desorption by introducing cooling gases such as normal temperature waste gas and normal temperature air, so as to continue adsorption; after being discharged, the cooling gas is heated to 210-230°C (higher than the polymerization temperature of styrene) by the desorption heat source 7 to obtain heated waste gas, which is then recycled to the desorption zone 5. Through this process, the efficient, convenient and stable treatment of organic waste gas containing styrene is completed.

[0037] This specific implementation method is merely an explanation of the utility model and not a limitation of the utility model. Any changes made by those skilled in the art after reading the specification of the utility model will be protected by patent law as long as they are within the scope of the claims of the utility model.

Claims

1. A zeolite rotor for treating styrene-containing organic waste gas, characterized in that: include: The anti-inhibition wheel core (1) has a porous channel structure that runs through the front and back, and the inner wall of the channel is loaded with an anti-inhibition molecular sieve; The VOCs wheel core (2) is arranged behind the anti-inhibition polymerization wheel core (1) and has a porous channel structure that runs through the front and back, and the inner wall of the channel is loaded with zeolite molecular sieve; The connecting shaft (3) is passed through the anti-polymerization wheel core (1) and the VOCs wheel core (2), connecting the two in series and being fixedly connected to the two.

2. The zeolite rotor for treating styrene-containing organic waste gas according to claim 1, characterized in that: The anti-inhibition wheel core (1) and the VOCs wheel core (2) both include a wheel core skeleton (13), wherein the wheel core skeleton (13) includes an inner ring plate (131), an outer ring plate (133), and a plurality of partition plates (132) connected between the inner surfaces of the inner ring plate (131) and the outer ring plate (133); the inner ring plate (131) is mounted on the connecting shaft (3); the partition plates (132) divide a plurality of fan-shaped areas between the inner ring plate (131) and the outer ring plate (133), and the porous channel structure includes a plurality of channel modules filled in the fan-shaped areas.

3. The zeolite rotor for treating styrene-containing organic waste gas according to claim 2, characterized in that: The channel module is formed by alternately arranging and interconnecting a first substrate unit (11) and a second substrate unit (12) made of glass fiber, wherein the first substrate unit (11) is planar and the second substrate unit (12) is corrugated.

4. The zeolite rotor for treating styrene-containing organic waste gas according to claim 2, characterized in that: The anti-polymerization wheel core (1) and the VOCs wheel core (2) are driven to rotate by a power device, and the power device is connected to the outer peripheral surface of the outer ring plate (133) through a transmission chain.

5. The zeolite rotor for treating styrene-containing organic waste gas according to claim 1, characterized in that: It also includes a space area where the anti-inhibition wheel core (1) and the VOCs wheel core (2) are located, and the space area is divided into an adsorption area (4), a desorption area (5) and a cooling area (6) in sequence along the running direction of the wheel core; The adsorption zone (4) is the exhaust gas inlet side on the side of the anti-inhibition wheel core (1), and the corresponding VOCs wheel core (2) side is the exhaust gas outlet side; the desorption zone (5) is the high-temperature gas inlet side on the side of the VOCs wheel core (2), and the corresponding anti-inhibition wheel core (1) side is the high-temperature gas outlet side; the cooling zone (6) is the cooling gas inlet side on the side of the anti-inhibition wheel core (1), and the corresponding VOCs wheel core (2) side is the cooling gas outlet side.

6. The zeolite rotor for treating styrene-containing organic waste gas according to claim 1, characterized in that: The anti-inhibition molecular sieve is one or more of ZEM-5, HZSM-5, USY, SAPO, MOR, and Beta.

7. The zeolite rotor for treating styrene-containing organic waste gas according to claim 1, characterized in that: The zeolite molecular sieve is one or more of NaY, USY, FAU, and ZSM.

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