Combined device for treating waste gas containing low-boiling-point components

Abstract

The utility model is suitable for the technical field of organic waste gas treatment equipment, and provides a combined device for treating waste gas containing low-boiling-point components. Comprising a first dry filter, a second dry filter, a rotating wheel, an adsorption main fan, a high-temperature heat exchanger, a heat storage type RCO, a chimney, an RCO main fan, a flame arrester, a desorption fan, a rotating wheel fresh air valve, an RCO fresh air valve, a first stop valve, a second stop valve, a third stop valve, a fourth stop valve and a high-temperature adjusting valve. According to the utility model, according to the change of seasonal temperature, substances containing low boiling points can enter the regenerative RCO together with tail gas desorbed by the rotating wheel for treatment in summer and enter the adsorption front end of the rotating wheel in winter, and the tail gas desorbed by the rotating wheel enters the regenerative RCO for treatment, so that compared with the existing rotating wheel and RCO treatment device, the device has the advantages of higher purification efficiency, energy conservation and environmental protection. And the investment cost and the operation cost are effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of organic waste gas treatment equipment, and particularly relates to a combined device for treating waste gas containing low-boiling components. Background Technique

[0002] The main components of VOCs include hydrocarbons, halogenated hydrocarbons, oxygenated hydrocarbons and nitrogenated hydrocarbons, as well as benzene series, organic chlorides, Freon series, organic ketones, amines, alcohols, ethers, esters, acids and petroleum hydrocarbon compounds, etc. They come from various industrial processes, such as coal chemical industry, petrochemical industry, automobile manufacturing, industrial painting, electronic equipment manufacturing, as well as the storage and transportation of volatile organic liquids, fiberglass boat manufacturing, printing, fuel paint manufacturing, industrial adhesive manufacturing, industrial washing solvents and household chemical production, etc. These VOCs are harmful to the environment and human health to a certain extent.

[0003] Due to people's beautiful demand for the environment and the gradual improvement of environmental protection regulations, the VOCs treatment technology devices are also gradually improved. RTO, RCO, TO, rotary wheel / activated carbon + RTO / CO / TO are the most common technologies for treating VOCs nowadays, which have the advantages of high purification efficiency and stable operation. However, for the waste gas components containing low-boiling substances, the adsorption efficiency of the rotary wheel / activated carbon adsorption stage is low, and there is an easy risk of non-compliance. Directly treating them with RTO / CO / TO devices has high treatment efficiency but high operating costs, which does not conform to the principle of energy conservation and environmental protection. Therefore, a combined device for treating waste gas containing low-boiling components is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a combined device for treating waste gas containing low-boiling components, aiming to solve the problems proposed in the above background technique.

[0005] An embodiment of the utility model is implemented as follows: A combined device for treating waste gas containing low-boiling components includes a first dry filter, a second dry filter, a rotary wheel, an adsorption main fan, a high-temperature heat exchanger, a regenerative RCO, a chimney, an RCO main fan, a flame arrester, a desorption fan, a rotary wheel fresh air valve, an RCO fresh air valve, a cut-off valve one, a cut-off valve two, a cut-off valve three, a cut-off valve four and a high-temperature regulating valve;

[0006] The first dry filter is located at the front end of the rotary wheel, and the first dry filter is provided with a rotary wheel fresh air valve for purging and cooling the rotary wheel;

[0007] The rotary wheel is configured with a desorption fan for performing desorption operation on the rotary wheel;

[0008] The adsorption main fan is connected to the rotary wheel and is communicated with the outlet pipeline of the high-temperature heat exchanger for conveying the heat-exchanged tail gas to the rotary wheel;

[0009] A high-temperature regulating valve is provided on the regenerative RCO furnace, and the high-temperature regulating valve is communicated with a high-temperature heat exchanger; a flame arrester and an RCO fresh air valve are provided at the front end of the regenerative RCO. The flame arrester is located between the regenerative RCO and the RCO main fan and is used to prevent backfire. The RCO fresh air valve is used for preheating and cooling the regenerative RCO.

[0010] The chimney is used to discharge the treated tail gas.

[0011] Furthermore, the filtration grade of the first dry filter is three or four levels.

[0012] Furthermore, the filtration grade of the second dry filter is two or three levels.

[0013] Furthermore, the high-temperature heat exchanger uses the method of taking heat from the furnace for heat exchange.

[0014] Furthermore, an electric heater / burner, regenerative bricks, a catalytic layer, and a valve system are provided inside the regenerative RCO.

[0015] Furthermore, both the RCO main fan and the desorption fan motor adopt a frequency conversion method.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] The waste gas combination device for treating waste gas containing low-boiling components can, according to the change of seasonal temperature, enable the substances containing low-boiling points to enter the regenerative RCO for treatment together with the tail gas after the wheel desorption in summer, enter the front end of the wheel adsorption in winter, and the tail gas after the wheel desorption then enters the regenerative RCO for treatment. Compared with the existing wheel + RCO treatment device, this device has a higher purification efficiency, saves energy consumption, and effectively reduces the investment cost and operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a waste gas combination device for treating waste gas containing low-boiling components.

[0019] In the figure: 1-1 - the first dry filter; 1-2 - the second dry filter; 2 - a rotating wheel; 3 - an adsorption main fan; 4 - a high-temperature heat exchanger; 5 - a regenerative RCO; 5-1 - a burner / heater; 5-2 - regenerative bricks; 5-3 - a catalytic layer; 5-4 - a valve system; 6 - a chimney; 7 - an RCO main fan; 8 - a flame arrester; 9 - a desorption fan; 10-1 - a rotating wheel fresh air valve; 10-2 - an RCO fresh air valve; 11-1 - a cut-off valve one, 11-2 - a cut-off valve two, 11-3 - a cut-off valve three, 11-4 - a cut-off valve four, 12 - a high-temperature regulating valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0021] The following describes in detail the specific implementation of the present utility model in conjunction with specific embodiments.

[0022] As Figure 1 shown, a waste gas combination device for treating waste gas containing low-boiling components provided by an embodiment of the present utility model includes a dry filter 1-1, a dry filter 1-2, a rotating wheel 2, an adsorption main fan 3, a high-temperature heat exchanger 4, a regenerative RCO 5, a chimney 6, an RCO main fan 7, a flame arrester 8, a desorption fan 9, a rotating wheel fresh air valve 10-1, an RCO fresh air valve 10-2, a cut-off valve 11-1, a cut-off valve 11-2, a cut-off valve 11-3, a cut-off valve 11-4 and a high-temperature regulating valve 12; the above components form a waste gas combination device through pipelines, valves and instruments.

[0023] As Figure 1 shown, as a preferred embodiment of the present utility model, a dry filter 1-1 is provided at the front end of the zeolite rotating wheel 2, and the filtration grade of the dry filter 1-1 is three or four levels, ensuring that the particulate content of the waste gas entering the rotating wheel 2 is ≤1 mg / Nm 3 . The dry filter 1-1 is provided with a rotating wheel fresh air valve 10-1. After the rotating wheel 2 finishes use, the rotating wheel 2 can be purged and cooled through the rotating wheel fresh air valve 10-1 to ensure safety.

[0024] As Figure 1 shown, as a preferred embodiment of the present utility model, the pretreatment method for low-boiling tail gas is to set a dry filter 1-2, and the filtration grade of the dry filter 1-2 is two or three levels, ensuring that the particulate content entering the waste gas regenerative RCO 5 is ≤5 mg / Nm 3 . Thus, it is ensured that the dust content of the tail gas entering the rotating wheel 2 or the regenerative RTO 5 meets the requirements. The low-boiling tail gas can enter the dry filter 1-1 or the dry filter 1-2 through valve switching.

[0025] As Figure 1 shown, as a preferred embodiment of the present utility model, when the rotating wheel 2 is desorbed, the desorbed tail gas is separately equipped with a desorption fan 9, and the motor of the desorption fan 9 adopts a frequency conversion method to perform the desorption operation on the rotating wheel 2 efficiently and stably.

[0026] As Figure 1As shown, as a preferred embodiment of the present utility model, the high-temperature heat exchanger 4 adopts the method of taking heat from the furnace for heat exchange, and the tail gas after high-temperature heat exchange is communicated with the outlet pipeline of the adsorption main fan 3.

[0027] As Figure 1 shown, as a preferred embodiment of the present utility model, a high-temperature regulating valve 12 is provided on the furnace of the regenerative RCO 5. The high-temperature regulating valve 12 is communicated with the high-temperature heat exchanger 4 to heat the desorption air of the heat exchange runner 2 for its desorption use.

[0028] The regenerative RCO 5 includes an electric heater / burner 5-1, ceramic regenerative bricks 5-2, a catalytic layer 5-3, and a bottom air inlet / outlet channel and valve system 5-4. Through valve switching, the tail gas entering the regenerative RCO 5 can absorb and release heat periodically. When using an electric heater, the inside of the furnace is electrically heated. When using a burner, the temperature in the combustion chamber is controlled at 280°C to 500°C to ensure the oxidation reaction of VOCs. A flame arrester 8 and an RCO fresh air valve 10-2 are provided at the front end of the regenerative RCO 5. The flame arrester 8 is between the regenerative RCO 5 and the RCO main fan 7 to prevent backfire; the RCO fresh air valve 10-2 is used for preheating the regenerative RCO 5 device and supplementing fresh air for cooling. When the high-temperature gas after the oxidation reaction in the combustion chamber flows through the regenerative brick 5-2, the regenerative brick 5-2 is heated up and stores heat, and the regenerative brick 5-2 after storing heat is used to preheat the subsequent incoming mixed waste gas.

[0029] In the embodiment of the present utility model, the heat source required for the desorption air of the runner 2 comes from the furnace of the regenerative RCO 5, enters the high-temperature heat exchanger 4 through the high-temperature regulating valve 12, and after being heat-exchanged to 180 - 220°C by the high-temperature heat exchanger 4, is supplied to the runner 2 for desorption use through the adsorption main fan 3.

[0030] As Figure 1 shown, as a preferred embodiment of the present utility model, the chimney 6 is used to discharge the treated tail gas.

[0031] As Figure 1 shown, as a preferred embodiment of the present utility model, the configuration of the RCO main fan 7 needs to consider the pressure loss of the low-boiling tail gas pipeline and the pressure loss of the desorption pipeline of the runner 2, and the motor of the RCO main fan 7 adopts frequency conversion control.

[0032] The working principle of the present utility model is:

[0033] The combined device for treating waste gas containing low-boiling components. When the external temperature is higher than 30 °C, the low-boiling tail gas is pretreated through the dry filter II 1-2, mixed with the desorption tail gas without low-boiling tail gas, and then transported by the RCO main fan 7 to the regenerative RCO 5 device for treatment; the desorption of the rotary wheel 2 is carried out by a separate desorption fan 9. When the external temperature is lower than 30 °C, the low-boiling tail gas undergoes valve switching (the cut-off valve II 11-2 is opened and the cut-off valve III 11-3 is closed), and the aggregated tail gas enters the dry filter I 1-1, is uniformly adsorbed by the rotary wheel 2, desorbed with a small amount of air, and then transported to the regenerative RCO 5 for up-to-standard treatment.

[0034] Due to the change in temperature, the low-boiling tail gas can be adsorbed and concentrated by the rotary wheel 2, saving the cost of the operation end of the regenerative RCO 5 and enabling efficient and stable operation.

[0035] The above is only the preferred implementation mode of the present utility model. It should be pointed out that for those skilled in the art, without departing from the concept of the present utility model, several deformations and improvements can also be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicability of the patent.

Claims

1. A combined device for treating waste gas containing low-boiling components, characterized in that, It includes Dry Filter 1, Dry Filter 2, a rotating wheel, an adsorption main fan, a high-temperature heat exchanger, a regenerative RCO, a chimney, an RCO main fan, a flame arrester, a desorption fan, a rotating wheel fresh air valve, an RCO fresh air valve, Shut-off Valve 1, Shut-off Valve 2, Shut-off Valve 3, Shut-off Valve 4, and a high-temperature regulating valve; Dry Filter 1 is located at the front end of the rotating wheel. A rotating wheel fresh air valve is provided on Dry Filter 1 for purging and cooling the rotating wheel; The rotating wheel is equipped with a desorption fan, which is used for the desorption operation of the rotating wheel; The adsorption main fan is connected to the rotating wheel and is communicated with the outlet pipeline of the high-temperature heat exchanger for transporting the heat-exchanged tail gas to the rotating wheel; A high-temperature regulating valve is provided on the regenerative RCO furnace chamber, and the high-temperature regulating valve is communicated with the high-temperature heat exchanger; A flame arrester and an RCO fresh air valve are provided at the front end of the regenerative RCO. The flame arrester is located between the regenerative RCO and the RCO main fan for preventing backfire, and the RCO fresh air valve is used for preheating and cooling the regenerative RCO; The chimney is used for discharging the treated tail gas.

2. The exhaust gas combination device for treating exhaust gas containing low-boiling components according to claim 1, wherein The filtration grade of Dry Filter 1 is grade three or four.

3. The exhaust gas treatment combination device for treating exhaust gas containing low-boiling components according to claim 1, characterized in that, The filtration grade of Dry Filter 2 is grade two or three.

4. The waste gas combination device for treating waste gas containing low-boiling components according to claim 1, characterized in that, The high-temperature heat exchanger uses the method of taking heat from the furnace chamber for heat exchange.

5. The exhaust gas treatment combination device for treating exhaust gas containing low-boiling components according to claim 1, characterized in that, An electric heater / burner, regenerative bricks, a catalytic layer, and a valve system are provided in the regenerative RCO.

6. The exhaust gas treatment combination device for treating exhaust gas containing low-boiling components according to claim 1, wherein Both the RCO main fan and the desorption fan motor adopt the frequency conversion method.

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