CN101352639A - Organic waste gas treatment system - Google Patents

Abstract

The invention relates to an organic waste gas disposal system, comprising a main exhausting fan, a pre-disposal device, an active carbon adsorption box, a purified gas exhausting device, a garbage burning furnace, a desorption fan, a first heat exchanger and a dedusting device; the active carbon adsorption box comprises a waste inlet, a purified gas outlet, a regenerated air inlet, and a regenerated air outlet; the garbage burning furnace is sequentially connected in series with the first heat exchanger and the dedusting device and communicated with the atmosphere; the hot wind inlet and outlet of the first heat exchanger are respectively communicated with the atmosphere and connected with the regenerated air inlet of the active carbon adsorption box by a valve; the regenerated air outlet of the active carbon adsorption box is connected with the air inlet of the garbage burning furnace by the valve; the desorption fan is connected in front of the regenerated air inlet of the active carbon adsorption box or between the regenerated air outlet of the active adsorption box and the air inlet of the garbage burning furnace; valves are respectively arranged before the purified gas inlet and the purified gas outlet of the active adsorption box. The organic waste gas disposal system greatly reduces the organic waste gas disposal cost and improves the working efficiency of the system.

Description

Organic waste gas treatment system

technical field

The invention relates to an industrial waste gas treatment system, more specifically, to an organic waste gas treatment system.

Background technique

In the process of industrial production, along with the output of products, a large amount of organic gas and solid waste are often produced at the same time, causing great pollution to the environment. For example, in the production of the painting industry, not only a large amount of paint slag is generated during the painting process, but also a large amount of low-concentration, high-volume organic gas is generated, which requires exhaust gas treatment before it can be discharged.

The treatment method of organic waste gas usually adopts the activated carbon adsorption method, and the harmful organic components in the organic waste gas are adsorbed through the strong adsorption of activated carbon, so that the gas meets the emission standard. In the process of activated carbon adsorption method, activated carbon will lose its activity after being adsorbed for a period of time, and it needs to be analyzed and regenerated before it can be reused.

There are two current activated carbon analysis and regeneration processes, one is steam + condensation recovery process, and the other is hot air + catalytic oxidation process. In both processes, a dedicated energy source is used for heating and regeneration of activated carbon.

The treatment method of solid waste generally adopts the waste incineration method. The waste incineration needs to heat and incinerate the waste through the first combustion chamber and high-temperature pyrolysis of the gas in the second combustion chamber. The investment of equipment is repeated, the energy consumption is large, and the purification efficiency is low.

The existing organic gas and solid waste treatment systems have the following disadvantages:

1. Separate treatment of organic gas and solid waste requires investment in the construction of two sets of treatment systems, duplication of investment in equipment, resulting in a great waste of infrastructure investment;

2. The energy consumption is large, and the energy generated by the combustion and treatment of solid waste cannot be comprehensively utilized;

3. Activated carbon needs to be desorbed and activated regularly, so that the production of the existing organic waste gas treatment system cannot be continuously carried out, which greatly reduces the working efficiency of the system;

Contents of the invention

The technical problem to be solved by the present invention is to provide an organic waste gas treatment system, which utilizes the energy generated in the system to activate and regenerate activated carbon, so as to improve the utilization rate of system equipment and energy, and reduce infrastructure investment.

The technical solution adopted by the present invention to solve the technical problem is: to construct an organic waste gas treatment system, including a main exhaust fan, a pretreatment device, an activated carbon adsorption box and a purified gas exhaust device, and the air inlet of the main exhaust fan is connected to the organic waste gas source, the air inlet of the pretreatment device is connected to the exhaust port of the main exhaust fan, the exhaust port of the pretreatment device is connected to the exhaust gas inlet of the activated carbon adsorption box, and the purified gas exhaust port of the activated carbon adsorption box is connected to the exhaust gas of the purified gas device; characterized in that:

It also includes a garbage incinerator, a desorption fan, a first heat exchanger and a dust removal device, and the activated carbon adsorption box also includes a regeneration air inlet and a regeneration exhaust outlet arranged on both sides of the activated carbon layer;

The exhaust port of the waste incinerator is connected to the main air inlet of the first heat exchanger, the main air outlet of the first heat exchanger is connected to the air inlet of the dust removal device, and the exhaust port of the dust removal device is connected to the air inlet of the first heat exchanger. The air is connected to the atmosphere; the heat exchange air inlet of the first heat exchanger is connected to the atmosphere, and the heat exchange air exhaust port of the first heat exchanger is connected to the regeneration air inlet of the activated carbon adsorption box through a valve; the regeneration exhaust of the activated carbon adsorption box The air port is connected to the air inlet of the waste incinerator through a valve; the desorption fan is connected before the regeneration air inlet of the activated carbon adsorption box or between the regeneration exhaust port of the activated carbon adsorption box and the air inlet of the garbage incinerator between;

Valves are arranged respectively before the purified gas inlet and after the purified gas exhaust port of the activated carbon adsorption box.

In the organic waste gas treatment system of the present invention, two or more activated carbon adsorption boxes are connected in parallel.

In the organic waste gas treatment system of the present invention, the garbage incinerator includes a primary combustion chamber and a secondary combustion chamber connected in series, the inlet of the primary combustion chamber is connected to the regeneration exhaust port of the activated carbon adsorption box, and the secondary combustion chamber The exhaust port of the combustion chamber is connected to the main air inlet of the first heat exchanger; the combustion temperature of the secondary combustion chamber is 1000°C to 2000°C.

In the organic waste gas treatment system of the present invention, a second heat exchanger is included, the main air inlet of the second heat exchanger is connected with the exhaust port of the waste incinerator, and the main air exhaust port of the second heat exchanger is The air port is connected to the main air inlet of the first heat exchanger, and the heat exchange air inlet and outlet of the second heat exchanger are connected to the equipment drying room through the drying room fan to form a loop.

In the organic waste gas treatment system of the present invention, the air inlet and outlet of the first heat exchanger and the air inlet and outlet of the second heat exchanger are respectively connected in parallel with bypasses, and valves are respectively arranged on the bypasses.

In the organic waste gas treatment system of the present invention, the air inlet of the first heat exchanger is connected with the air after being connected with the filter device.

In the organic waste gas treatment system of the present invention, the dust removal device is a water-cooled dust collector, and the exhaust port of the dust removal device communicates with the purified gas exhaust device by connecting a fan of the dust collector and then communicates with the atmosphere.

In the organic waste gas treatment system of the present invention, the purified gas exhaust device is a chimney, and the pretreatment device is a dry filter.

In the organic waste gas treatment system of the present invention, the air inlet of the main exhaust fan is connected to the filter device and communicated with the organic waste gas source.

Implement the organic waste gas treatment system of the present invention, compared with the prior art, its beneficial effect is:

1. Garbage treatment and organic waste gas treatment are carried out in one system, which realizes the full utilization of equipment and energy, and greatly reduces the cost of infrastructure;

2. Utilize the heat energy of waste combustion in the system to activate and regenerate the activated carbon, without connecting additional pipelines and replacing activated carbon, which greatly improves the working efficiency of the system.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a schematic diagram of the system structure of an embodiment of the organic waste gas treatment system of the present invention.

Detailed ways

As shown in Figure 1, the organic waste gas treatment system of the present invention includes a main exhaust fan 1, a dry filter 2 (other commonly used filter devices can be used for pretreatment), an activated carbon adsorption box 3, and dust 4 (the dust can be purified with other commonly used Gas exhaust device instead), garbage incinerator 5, desorption fan 12, first heat exchanger 6 and dust removal device 23.

The activated carbon adsorption box 3 is provided with an exhaust gas inlet A, a purified gas outlet B respectively arranged on both sides of its activated carbon layer, and a regeneration inlet C and a regeneration outlet D respectively arranged on both sides of its activated carbon layer.

The air inlet of the main exhaust fan 1 is connected with the organic waste gas source (such as a paint room) after being connected with the filter device 11, and the filter device 11 adopts a commonly used filter. In other embodiments, the air inlet of the main exhaust fan 1 may also be directly connected to the organic waste gas source.

The air inlet of the dry filter 2 is connected to the exhaust port of the main exhaust fan 1, the exhaust port is connected to the exhaust gas inlet A of the activated carbon adsorption box 3, and the purified gas exhaust port B of the activated carbon adsorption box 3 is connected to the air intake of the dust 4 At the mouth, the purified gas is discharged to the atmosphere through the smoke dust 4.

The desorption fan 12 is connected between the regeneration exhaust port D of the activated carbon adsorption box 3 and the air inlet of the waste incinerator 5 . In other embodiments, the desorption blower 12 may be connected before the regeneration inlet C of the activated carbon adsorption box 3 .

Garbage incinerator 5 includes a screw feeding port 51, and garbage or other waste materials such as solid waste such as paint slag enter the garbage incinerator 5 through the screw feeding port 51, and the diesel fuel of the garbage incinerator 5 is delivered to the ignition combustion furnace by the oil tank 17 through the pipeline. The device 15 is ignited by an automatic ignition system. In other embodiments, the waste incinerator 5 can use other fuels such as natural gas.

In this embodiment, a second heat exchanger 19 is also provided. The exhaust port of the garbage incinerator 5 is connected with the main air inlet of the second heat exchanger 19, the main air outlet of the second heat exchanger 19 is connected with the main air inlet of the first heat exchanger 6, and the second heat exchanger 19 is connected with the main air inlet of the first heat exchanger 6. The heat exchange air inlet and outlet of the exchanger 19 are connected into a circuit through the drying room fan 21 and the equipment drying room 22, so as to fully utilize the heat energy produced by the garbage incinerator 5 to dry the equipment. In other embodiments, the second heat exchanger 19 may not be provided, and the exhaust port of the waste incinerator 5 is directly connected to the main air inlet of the first heat exchanger 6 .

In order to realize the control of using and not using the first heat exchanger 6 and the second heat exchanger 20, a bypass is connected in parallel at the air inlet and outlet of the first heat exchanger 6 and a valve 23 is set on the bypass, and a valve 23 is set on the second heat exchanger 6. The air inlet and outlet of the exchanger 20 are connected in parallel with a bypass and a valve 19 is arranged on the bypass. When the heat exchanger is used, the bypass valve is closed, and the high-temperature furnace gas of the garbage incinerator 5 passes through the heat exchanger for heat exchange; when the heat exchanger is not used, the bypass valve is opened, and the high-temperature furnace gas of the garbage incinerator 5 passes through the bypass Through the method, the flexible utilization of the heat energy of the high-temperature furnace gas can be achieved.

The main air exhaust port of the first heat exchanger 6 is connected with the air inlet of the dust removal device 28, and the air outlet of the dust removal device 28 is connected with the air inlet of the soot 4 after the dust remover fan 30 is connected, and the soot 4 is jointly utilized with the purified gas. Perform gas venting. A valve 29 may be provided between the exhaust port of the dust removal device 28 and the fan 30 of the dust collector.

In other embodiments, the exhaust port of the dedusting device 28 may communicate with the atmosphere, and directly discharge the dedusted gas into the atmosphere.

In this embodiment, the dust removal device 28 adopts a water-cooled dust collector, and the water-cooled dust collector is supplied with cooling water to cool the dust removal gas through the water tank 27, and at the same time, the thermal energy of the dust removal gas is used to generate hot water for use in bathrooms (exit E) or other hot water. In the case of water (exit F).

In this embodiment, the heat exchange air inlet of the first heat exchanger 6 is sequentially connected to the valve 28, the fan 27 and the filter 26, and then communicates with the atmosphere, so that clean activated carbon regeneration air and sufficient air volume can be obtained. In other embodiments, the heat exchange air inlet of the first heat exchanger 6 can be directly connected to the atmosphere, and the air volume of the activated carbon regeneration air is guaranteed by the air volume of the desorption fan 12 .

In order to ensure that the activated carbon adsorption box 3 switches between the two working conditions of adsorbing and treating organic waste gas and regenerating and activating the activated carbon layer after the activated carbon layer in the activated carbon adsorption box 3 is saturated, the exhaust gas in the activated carbon adsorption box 3 is A valve 7 is set before port A, a valve 8 is set behind the purified gas exhaust port B, a valve 9 is set between the regeneration exhaust port of the activated carbon adsorption box 3 and the air inlet of the waste incinerator 5, and a valve 9 is set between the first heat exchanger 6 A valve 10 is provided between the exhaust port of the heat exchange air and the regeneration air inlet C of the activated carbon adsorption box 3 . When the activated carbon adsorption box 3 is in the working condition of adsorption and treatment of organic waste gas, the valves 9 and 10 are closed, and the valves 7 and 8 are opened to form a purification discharge channel. When the activated carbon adsorption box 3 is in the condition of regenerating and activating the activated carbon layer, the valves 7 and 8 are closed, and the valves 9 and 10 are opened to form a regeneration and activation path, and the heat exchange air ( Activated catalyst can be added) into the activated carbon adsorption box 3 to regenerate and activate the activated carbon layer, and the treated gas enters the garbage incinerator 5 for incineration.

Activated carbon adsorption box 3 can adopt one or two, three or more in parallel according to its processing capacity and the amount of waste gas to be treated, so as to meet the requirements of different waste gas treatment volumes. The activated carbon adsorption boxes 3 of the present embodiment are three in parallel.

When the garbage incinerator 5 is only provided with an air inlet, between the regeneration exhaust port D connecting the active carbon adsorption box 3 and the air inlet of the garbage incinerator 5, a valve 13 is set, and at the inlet between the valve 13 and the garbage incinerator 5 Between the gas ports, a branch with a valve 14 is set, so that when one or more charcoal adsorption boxes 3 are performing activated carbon layer regeneration and activation treatment, the valve 13 is turned off and the valve 14 is opened to ensure the progress of the waste incinerator 5. gas.

In order to ensure the full combustion of garbage and concentrated gas, the garbage incinerator 5 is provided with a primary combustion chamber 52 and a secondary combustion chamber 18 connected in series, the air inlet of the primary combustion chamber 52 and the regenerative exhaust port D of the activated carbon adsorption box 3 Connection, the exhaust port of the secondary combustion chamber 18 is connected with the main air inlet of the second heat exchanger 20 or the main air inlet of the first heat exchanger 6; the combustion temperature of the secondary combustion chamber 18 is 1000°C to 2000°C. After full combustion in the secondary combustion chamber 18, the exhaust gas from the waste incinerator 5 can achieve the effects of no smoke, no odor, and no secondary pollution. The diesel fuel in the secondary combustion chamber 18 is delivered to the ignition burner 16 by the oil tank 17 through pipelines, and is ignited by the automatic ignition system.

Claims (9)

1, a kind of organic waste gas treatment system, comprise main exhaust fan, pretreatment unit, charcoal absorption case and purified gas exhaust apparatus, this main exhaust fan air inlet connects organic exhaust gas source, this pretreatment unit air inlet connects this main exhaust fan exhaust outlet, this pretreatment unit exhaust outlet connects this charcoal absorption case waste gas inlet, and this charcoal absorption case purified gas exhaust outlet connects this purified gas exhaust apparatus; It is characterized in that:

Also comprise incinerator, desorption blower fan, first heat exchanger and dust arrester, described charcoal absorption case also comprises regeneration air inlet and the regeneration exhaust outlet that is arranged on its active carbon layer both sides;

Described incinerator exhaust outlet is connected with the described first heat exchanger main air air inlet, and this first heat exchanger main air exhaust outlet connects described dust arrester air inlet, and this dust arrester exhaust outlet is communicated with atmosphere; This first heat exchanger heat exchange wind air inlet is communicated with atmosphere, and this first heat exchanger heat exchange wind exhaust outlet connects described charcoal absorption case regeneration air inlet through valve; This charcoal absorption case regeneration exhaust outlet connects this incinerator air inlet through valve; Described desorption blower fan is connected before the regeneration air inlet of this charcoal absorption case or is connected between this charcoal absorption case regeneration exhaust outlet and this incinerator air inlet;

Before the purified gas air inlet of this charcoal absorption case He behind the purified gas exhaust outlet, valve is set respectively.

2, organic waste gas treatment system as claimed in claim 1 is characterized in that: described charcoal absorption case is parallel with one another two or more.

3, organic waste gas treatment system as claimed in claim 1, it is characterized in that: described incinerator comprises the primary zone and the secondary combustion chamber of mutual series connection, this primary zone's air inlet is connected with described charcoal absorption case regeneration exhaust outlet, and this secondary combustion chamber exhaust outlet is connected with the described first heat exchanger main air air inlet; The ignition temperature of described secondary combustion chamber is 1000 ℃ to 2000 ℃.

4, as the described organic waste gas treatment system of one of claim 1 to 3, it is characterized in that: comprise second heat exchanger, the main air air inlet of this second heat exchanger is connected with described incinerator exhaust outlet, the main air exhaust outlet of this second heat exchanger is connected with the described first heat exchanger main air air inlet, and the heat exchange wind inlet and outlet of this second heat exchanger connects into the loop by drying room blower fan and equipment baking room.

5, organic waste gas treatment system as claimed in claim 4 is characterized in that: the bypass in parallel respectively of the inlet and outlet of the inlet and outlet of described first heat exchanger and described second heat exchanger is provided with valve respectively in the described bypass.

6, organic waste gas treatment system as claimed in claim 4 is characterized in that: the described first heat exchanger air inlet is communicated with atmosphere after connecting filter.

7, organic waste gas treatment system as claimed in claim 4 is characterized in that: described dust arrester is the water-cooled dust arrester, and this dust arrester exhaust outlet is communicated with atmosphere after the deduster blower fan is communicated with described purified gas exhaust apparatus by connecting.

8, organic waste gas treatment system as claimed in claim 4 is characterized in that: described purified gas exhaust apparatus is a chimney, and described pretreatment unit is a dry filter.

9, organic waste gas treatment system as claimed in claim 4 is characterized in that: described main exhaust fan air inlet is communicated with the organic exhaust gas source after connecting filter.