Zeolite rotating wheel series system for high-efficiency treatment of high-concentration organic waste gas

Abstract

The utility model belongs to the technical field of environmental protection equipment, and particularly discloses a zeolite rotating wheel series system for high-efficiency treatment of high-concentration organic waste gas, which comprises a first-stage zeolite rotating wheel, a second-stage zeolite rotating wheel, heating equipment, a waste gas inlet pipe, a purified gas outlet pipe and a return pipeline. According to the utility model, the two stages of zeolite rotating wheels are connected in series to adsorb and concentrate high-concentration waste gas twice; the small-air-volume and high-concentration organic waste gas desorbed by the second-stage zeolite rotating wheel is conveyed to the front end of the first-stage zeolite rotating wheel through a backflow pipeline to be mixed with the initial waste gas and then purified again; the organic waste gas desorbed by the first-stage zeolite rotating wheel is incinerated and cracked through deep treatment equipment; and waste gas at an outlet of the rotating wheel cooling area is heated by heating equipment and conveyed to the rotating wheel desorption area for desorbing the two-stage rotating wheel. The device can meet the treatment requirements of high-concentration, large-air-volume and low-emission organic waste gas in the industries of chemical industry, pharmacy, coating and the like, and meets the stricter environmental protection standard requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a zeolite rotor series system for efficient treatment of high-concentration organic waste gas. Background Art

[0002] With the acceleration of industrialization, especially in the chemical, pharmaceutical, coating and other industries, high concentration (organic waste gas concentration> 1000mg / m 3 The problem of treating organic waste gas with high air volume and low emission requirements is becoming increasingly prominent. Traditional waste gas treatment processes often face challenges such as low efficiency, high operating costs, and unstable treatment effects when treating such waste gas.

[0003] According to existing technologies, the methods used to treat high-concentration and high-volume exhaust gases include: using zeolite rotors for adsorption and concentration, optimizing the formula of zeolite rotor molecular sieves, and expanding the adsorption capacity of the rotor equipment; directly using catalytic incinerators without adsorption-concentration; adsorption catalyst fixed beds, etc. However, when facing high-concentration exhaust gases (concentration>1000mg / m 3 ), directly using a catalytic incinerator has the problems of difficulty in meeting standards, high operating costs, and being unsuitable for large air volumes; the adsorption catalyst fixed bed mode can increase the adsorption capacity by increasing the adsorbent stacking thickness, but there is also a design upper limit for the stacking height; a single-stage zeolite wheel may have poor treatment effects due to limited adsorption capacity, incomplete desorption and other problems.

[0004] Therefore, it is difficult to achieve stable ultra-low emissions of high-concentration, large-volume exhaust gases with existing technologies. Utility Model Content

[0005] The purpose of this utility model is to provide a zeolite rotor series system for the efficient treatment of high-concentration organic waste gas. Through the series connection of two-stage rotor equipment and the design of the operating system, the treatment efficiency and stability of high-concentration, large-volume organic waste gas are improved, and the emission concentration is reduced.

[0006] In order to achieve the above-mentioned purpose, the specific technical solutions adopted by the present utility model are as follows:

[0007] A zeolite rotor series system for efficient treatment of high-concentration organic waste gas, comprising a first-stage zeolite rotor, a second-stage zeolite rotor, a heating device, an exhaust gas inlet pipe, a purified gas outlet pipe, and a reflux pipeline;

[0008] The first-stage zeolite rotor and the second-stage zeolite rotor are disc-shaped structures loaded with zeolite molecular sieves. The structure is sequentially divided into three fan-shaped airflow channels: adsorption zone, desorption zone and cooling zone along the rotation direction (the partition is a fixed area division in space and does not change with the rotation of the rotor);

[0009] The adsorption zone inlet and the cooling zone inlet of the first-stage zeolite rotor are respectively connected to the exhaust gas inlet pipe, the adsorption zone inlet and the cooling zone inlet of the second-stage zeolite rotor are respectively connected to the adsorption zone outlet of the first-stage zeolite rotor, and the adsorption zone outlet of the second-stage zeolite rotor is connected to the purified gas discharge pipe;

[0010] The outlet of the cooling zone of each stage zeolite wheel forms a loop with the inlet of the desorption zone through the heating equipment. The outlet of the desorption zone of the first stage zeolite wheel is connected to the deep treatment equipment, and the outlet of the desorption zone of the second stage zeolite wheel is connected to the exhaust gas intake pipe through the reflux pipeline.

[0011] In the above-mentioned system of the present invention, the first-stage zeolite rotor is used to perform the first-stage adsorption and concentration of high-concentration exhaust gas; the second-stage zeolite rotor is used to perform deep-level adsorption and concentration of the exhaust gas after adsorption by the first-stage zeolite rotor; the small-volume, high-concentration organic exhaust gas desorbed by the second-stage zeolite rotor is transported to the front end of the first-stage zeolite rotor through a reflux pipeline to be mixed with the initial exhaust gas and then purified again; the organic exhaust gas desorbed by the first-stage zeolite rotor is incinerated and cracked using deep treatment equipment; the exhaust gas at the outlet of the rotor cooling zone is heated using a heating device and transported to the rotor desorption zone for desorption on the two-stage rotor. After the two-stage zeolite rotors are connected in series, the second-stage zeolite rotor processes less air volume than the first-stage zeolite rotor, and its processing efficiency and concentration multiple are higher than those of the first-stage zeolite rotor. Compared with a single zeolite rotor system, it is more suitable for the treatment of high-concentration, large-volume organic exhaust gas.

[0012] Furthermore, a reflux fan is provided on the reflux pipeline for transporting the desorbed and concentrated exhaust gas from the second-stage zeolite rotor to the exhaust gas inlet pipe at the front end of the first-stage zeolite rotor through the reflux pipeline.

[0013] Furthermore, an adsorption fan is provided on the purified gas discharge pipe, which is the power source for the negative pressure suction of the adsorption operation of the two-stage series-connected zeolite wheels.

[0014] Furthermore, the deep treatment equipment is an incinerator or other device or system with incineration function.

[0015] Furthermore, the first-stage zeolite rotor is larger in volume than the second-stage zeolite rotor, specifically, its diameter and / or thickness may be larger than the second-stage zeolite rotor. Because the first-stage zeolite rotor intercepts the majority of high-concentration organic waste gas and faces a greater impact load, this model difference allows it to process a larger air volume, or in other words, a larger total volume than the second-stage zeolite rotor, thereby improving operational stability.

[0016] Furthermore, the adsorption zone of each zeolite wheel is larger than the desorption zone and the cooling zone to improve purification efficiency. Furthermore, the desorption zone of each zeolite wheel is the same as the cooling zone.

[0017] Furthermore, the zeolite molecular sieve is a commercially available zeolite material for organic adsorption, such as NaY, USY, FAU, ZSM, etc.

[0018] The utility model has the following beneficial effects:

[0019] The system, formed by connecting two stages of runners in series, improves operational stability. Even if a minor fault or performance degradation occurs in one stage, the other stage can continue to operate, ensuring continuous exhaust gas treatment. The buffering effect between the two stages also helps reduce system fluctuations and improve operational stability.

[0020] After adsorption treatment by the zeolite wheel series system, the high-concentration organic waste gas can achieve a system efficiency of >98% and high-efficiency treatment. Combined with the recycling pipeline and deep treatment equipment, it can effectively reduce the energy consumption of high-concentration and large-volume organic waste gas treatment and improve operational stability. It also has a simple design, simple process flow and low operating costs.

[0021] Therefore, the utility model can meet the needs of chemical, pharmaceutical, coating and other industries for the treatment of high-concentration, large-volume, and low-emission organic waste gas, and meet more stringent environmental protection standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 : A schematic structural diagram of a zeolite rotor series system for the efficient treatment of high-concentration organic waste gas described in the present invention.

[0023] In the figure: 1-first stage zeolite rotor, 2-second stage zeolite rotor, 3-exhaust gas inlet pipe, 4-purified gas outlet pipe, 5-adsorption fan, 6-heating equipment, 7-reflux pipeline, 8-reflux fan; 11, 21-adsorption zone, 12, 22-desorption zone, 13, 23-cooling zone. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] A zeolite rotor series system for efficient treatment of high-concentration organic waste gas, such as Figure 1 As shown, it includes a first-stage zeolite rotor 1, a second-stage zeolite rotor 2, an exhaust gas inlet pipe 3, a purified gas outlet pipe 4, an adsorption fan 5, a heating device 6, a return line 7 and a return fan 8.

[0027] The first-stage zeolite runner 1 and the second-stage zeolite runner 2 are disc-shaped structures loaded with zeolite molecular sieves and have honeycomb-shaped channels for gas circulation. The volume of the first-stage zeolite runner 1 is larger than that of the second-stage zeolite runner 2. The disc-shaped structure is sequentially divided into three fan-shaped airflow channels along the direction of rotation: an adsorption zone (11, 21), a desorption zone (12, 22), and a cooling zone (13, 23); the area of the adsorption zone 11 is larger than that of the desorption zone 12 and the cooling zone 13, and the area of the desorption zone 12 is the same as that of the cooling zone 13; the area of the adsorption zone 21 is larger than that of the desorption zone 22 and the cooling zone 23, and the area of the desorption zone 22 is the same as that of the cooling zone 23.

[0028] The inlet of the adsorption zone 11 and the inlet of the cooling zone 12 of the first-stage zeolite rotor 1 are respectively connected to the exhaust gas inlet pipe 3, the inlet of the adsorption zone 21 and the inlet of the cooling zone 22 of the second-stage zeolite rotor 2 are respectively connected to the outlet of the adsorption zone 11 of the first-stage zeolite rotor 1, and the outlet of the adsorption zone 21 of the second-stage zeolite rotor 2 is connected to the purified gas exhaust pipe 4, and the purified gas exhaust pipe 4 is provided with an adsorption fan 5.

[0029] The outlet of the cooling zone 13 of the first-stage zeolite rotor 1 forms a loop with the inlet of the desorption zone 12 through the heating device 6, and the outlet of the desorption zone 12 is connected to the deep treatment equipment; the outlet of the cooling zone 23 of the second-stage zeolite rotor 2 forms a loop with the inlet of the desorption zone 22 through the heating device 6, and the outlet of the desorption zone 22 is connected to the exhaust gas intake pipe 3 through the return line 7, and the return line 7 is provided with a return fan 8.

[0030] The exhaust gas treatment process in the above system is as follows:

[0031] High concentration, large volume organic waste gas (waste gas inlet concentration> 1000mg / m 3 ) The organic waste gas is pumped by the adsorption fan 5 to the adsorption zone 11 of the first-stage zeolite rotor 1 to complete the first-stage adsorption. After the first-stage adsorption of most of the organic waste gas, it is sent to the adsorption zone 21 of the second-stage zeolite rotor 2 for deep adsorption and discharged through the purified gas discharge pipe 4. After the two-stage rotor adsorption, the total purification efficiency of the system can reach more than 98%;

[0032] The two-stage rotor rotates through the adsorption zone, desorption zone and cooling zone in sequence, thereby completing the organic matter adsorption-desorption-rotor cooling operation. Specifically, the small air volume and high-concentration exhaust gas obtained by desorption and concentration in the desorption zone 22 of the second-stage zeolite rotor 2 is sent to the front end of the system by the return fan 8 through the return pipeline 7, and is mixed with the original high-concentration exhaust gas in the exhaust gas inlet pipe 3 and then purified by the system. The exhaust gas obtained by desorption and concentration in the desorption zone 12 of the first-stage zeolite rotor 1 is sent to the deep treatment equipment for incineration and cracking into CO2 and water, completing deep-level purification. The exhaust gas at the outlet of the cooling zone 13 of the first-stage zeolite rotor 1 is heated by the heating equipment 6 and then transported to the desorption zone 12 for reuse. The exhaust gas at the outlet of the cooling zone 23 of the second-stage zeolite rotor 2 is heated by the heating equipment 6 and then transported to the desorption zone 22 for reuse.

[0033] 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 series system for efficient treatment of high-concentration organic waste gas, characterized by: It includes a first-stage zeolite runner, a second-stage zeolite runner, a heating device, an exhaust gas inlet pipe, a purified gas outlet pipe and a reflux line; The first-stage zeolite rotor and the second-stage zeolite rotor are disc-shaped structures loaded with zeolite molecular sieves, which are sequentially divided into three fan-shaped airflow channels: adsorption zone, desorption zone and cooling zone along the rotation direction; The adsorption zone inlet and the cooling zone inlet of the first-stage zeolite rotor are respectively connected to the exhaust gas inlet pipe, the adsorption zone inlet and the cooling zone inlet of the second-stage zeolite rotor are respectively connected to the adsorption zone outlet of the first-stage zeolite rotor, and the adsorption zone outlet of the second-stage zeolite rotor is connected to the purified gas discharge pipe; The outlet of the cooling zone of each stage zeolite wheel forms a loop with the inlet of the desorption zone through the heating equipment. The outlet of the desorption zone of the first stage zeolite wheel is connected to the deep treatment equipment, and the outlet of the desorption zone of the second stage zeolite wheel is connected to the exhaust gas intake pipe through the reflux pipeline.

2. The zeolite rotor series system for efficient treatment of high-concentration organic waste gas according to claim 1 is characterized by: A return fan is provided on the return pipeline.

3. The zeolite rotor series system for efficient treatment of high-concentration organic waste gas according to claim 1 is characterized by: An adsorption fan is provided on the purified gas discharge pipe.

4. The zeolite rotor series system for efficient treatment of high-concentration organic waste gas according to claim 1 is characterized by: The deep treatment equipment is an incinerator.

5. The zeolite rotor series system for efficient treatment of high-concentration organic waste gas according to claim 1 is characterized in that: The volume of the first-stage zeolite wheel is larger than that of the second-stage zeolite wheel.

6. The zeolite rotor series system for efficient treatment of high-concentration organic waste gas according to claim 1 is characterized by: The adsorption zone area of each stage of the zeolite wheel is larger than the desorption zone and the cooling zone.

7. The zeolite rotor series system for efficient treatment of high-concentration organic waste gas according to claim 6, characterized in that: The desorption zone area of each stage of zeolite wheel is the same as the cooling zone area.

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