CN105381678B - The purification of active carbon by chemical method production tail gas and recovery system - Google Patents

Abstract

The invention discloses a kind of purification of active carbon by chemical method production tail gas and recovery system, including：Absorber, there is the receiving space for being used for accommodating Activated Carbon Production raw material, absorber gas access and absorber gas vent, the absorber gas access connects with the offgas outlet of active carbon production equipment.

Description

Purification and recovery system of tail gas produced by chemical activated carbon

technical field

The invention relates to a purification and recovery method and a purification and recovery system, in particular to a purification and recovery method and a purification and recovery system for tail gas produced by chemical activated carbon.

Background technique

The chemical method (phosphoric acid method and zinc chloride method) activated carbon production process is to fully mix a certain concentration of chemical activator (phosphoric acid and zinc chloride) solution with woody raw materials, then transport it into the internal heating converter, and use high-temperature flue gas as the The heat source directly heats the material, and the tail gas generated during the production process will contain a certain amount of chemical activators, with a concentration of 500-2000ppm. Direct discharge will not only pollute the air but also cause waste of chemical activators. At present, the commonly used tail gas treatment methods include spraying method and electrostatic defogging method. Due to the high content of carbon powder and wood tar in the recovered liquid, the spraying method makes it difficult to filter and evaporate and concentrate, especially when the recovered liquid has a large volume. The requirements and operational difficulty requirements are relatively large. Although the recovery of tail gas chemical activators by means of electrostatic demisting reduces the volume of recovered liquid, it consumes a lot of power and requires high equipment and technology, so it is difficult to be widely promoted.

A method for recovering a chemical activator is disclosed in the prior art, which includes first recovering the solution containing the chemical activator by spraying, then uniformly mixing the woody material with the chemical activator solution and drying it by further heating, and finally The chemical activator in the solution stays in the wood-based raw materials to achieve the purpose of recovering the chemical activator. Although adopting this method can make part of the chemical activators in the solution be recycled through woody raw materials, due to the incomplete treatment of the chemical activator waste gas by the spraying method, the low concentration of the chemical activator in the solution after spraying is not conducive to adsorption, After the woody raw material is mixed with the chemical activator solution, it is easy to cause problems such as part of the chemical activator being entrained and discharged by water vapor in the drying step, which makes the recovery efficiency of the chemical activator in this method not high. At the same time, since this method requires spraying equipment, mixing equipment, and drying equipment, the process is complex and energy-consuming, and the water vapor entrained with chemical activators generated during the drying process causes secondary pollution and other problems, it is difficult to promote in the industry.

Contents of the invention

For this reason, the technical problem to be solved by the present invention is to provide a purification and recovery rate high, purification and recovery process is simple, purification and recovery process cost is low, more environmentally friendly for the purification of pollutants in the tail gas of chemical activated carbon production and recovery methods, as well as purification and recovery systems.

The present invention is a method for purifying and recovering tail gas from activated carbon production by chemical method, comprising the following steps: contacting the raw materials for activated carbon production with the tail gas discharged from activated carbon production equipment, so that the raw materials for activated carbon production can be used for chemical production in the tail gas The pollutants produced by activated carbon are adsorbed and recovered.

In the above method, the initial temperature of the tail gas is 30-250° C., and the pollutants that can be used in the chemical activated carbon production include at least one of phosphoric acid, hydrogen chloride, zinc chloride and wood tar.

The above method also includes: performing a temperature maintaining step on the tail gas discharged from the activated carbon production equipment through a temperature maintaining device, so that the tail gas output from the temperature maintaining device and the tail gas entering the temperature maintaining device The temperature drop between is less than 30%.

The above method also includes: a step of heating the tail gas discharged from the activated carbon production equipment by a heating device; wherein, the heating method can be jacket-type indirect heating or direct heating directly providing hot gas.

The above method, wherein the temperature of the tail gas fed into the adsorber is 60-240°C.

In the above method, the activated carbon production raw material is carbon-containing plant pulverization.

In the above method, the carbon-containing plant crushed product includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed product, wood chips and the like.

The above method, wherein the temperature of the tail gas fed into the adsorber is 100-230°C.

In the above method, the initial temperature of the activated carbon production tail gas is 30-90° C., and the temperature of the tail gas is raised by at least 20% by the heating device.

The chemical method preferably includes phosphoric acid method and zinc chloride method, and the initial concentration of the chemical activator in the tail gas is preferably 500-2000ppm.

A purification and recovery system adopting any one of the above methods, comprising: an adsorber having a storage space for containing activated carbon production raw materials, an adsorber gas inlet and an adsorber gas outlet, and the adsorber gas inlet and activated carbon production equipment The exhaust gas outlet is connected.

The above-mentioned purification and recovery system also includes: a temperature maintaining device, which has a gas inlet of the maintaining device and a gas outlet of the maintaining device, and is arranged between the activated carbon production equipment and the adsorber, wherein the gas inlet of the maintaining device is connected to the activated carbon The tail gas outlet of the production equipment is connected, and the gas outlet of the holding device is connected with the gas inlet of the adsorber, so that the temperature drop between the gas output from the temperature holding device and the tail gas entering the temperature holding device is less than 30%.

The above-mentioned purification and recovery system also includes: a heating device, which is arranged between the activated carbon production equipment and the adsorber, and is used to heat the tail gas before passing into the adsorber, wherein the heating device includes an indirect A heating device and a direct heating device, the indirect heating device is provided with a heating device gas inlet and a heating device gas outlet, and the direct heating device is provided with a hot gas inlet.

The above-mentioned purification and recovery system also includes: a fan installed between the activated carbon production equipment and the adsorber for driving the activated carbon production tail gas into the adsorber; or installed at the rear end of the adsorber , for introducing the tail gas into the adsorber and then discharging it.

The above-mentioned purification and recovery system includes at least two fans, which are respectively installed between the activated carbon production equipment and the adsorber and at the rear end of the adsorber to maintain the balance of wind pressure before and after the adsorber.

The above-mentioned purification and recovery system further includes: a fan controller, which is used for constant control of the output power of the fan.

The above purification and recovery system also includes: a temperature detection device, located near the gas inlet of the heating device, used to detect the temperature of the activated carbon production tail gas entering the heating device to obtain temperature information, and the heating device according to The temperature information detected by the temperature detection device controls the heating power of the heating device, and when the heating device is preferably when the initial temperature of the exhaust gas is 30-90°C, the exhaust gas is heated by the heating device Warm up at least 20%.

In the above purification and recovery system, the adsorber includes an adsorber body, the accommodation space is located inside the adsorber body, and the adsorber gas inlet and the adsorber gas outlet are arranged on the adsorber body , the adsorber body is also provided with a feed port and a discharge port; it also includes a belt conveyor with a conveyor belt, which is located inside the adsorber body; wherein, the belt conveyor is used for Receive the activated carbon production raw material entering from the feed inlet, and transport the activated carbon production raw material to the discharge port to discharge the adsorber body, and the activated carbon production raw material is in the process of being transported The off-gas is contacted and the flow of the off-gas is blocked.

In the above-mentioned purification and recovery system, the adsorber also includes a feed bin, which is arranged at the feed inlet; a limit device, which is arranged at the feed bin or the feed inlet, is used Cooperate with the belt conveyor to limit the thickness of the activated carbon production raw material on the conveyor belt of the belt conveyor.

In the above-mentioned purification and recovery system, the limiting device cooperates with the belt conveyor to limit the thickness of the activated carbon production raw material on the conveyor belt of the belt conveyor to 100-1000mm ; One end of the conveyor belt of the belt conveyor is located at the inlet, and the other end is located at the outlet, and the belt conveyor is located at the outlet according to the inlet and the outlet. The distance of the mouth controls the conveying speed, so that the residence time of the activated carbon production raw material on the conveyor belt is: 1-5h, and the fan controller is suitable for controlling the flow rate of the tail gas entering the adsorber as: 0.1-0.8m/s.

An adsorber used for the purification and recovery of the tail gas produced by the chemical method of activated carbon, comprising: a storage space for accommodating raw materials for activated carbon production, an adsorber gas inlet and an adsorber gas outlet, the gas inlet of the adsorber is connected to the activated carbon production The tail gas outlet of the equipment is connected to make the activated carbon production raw materials contact with the tail gas discharged from the activated carbon production equipment.

In the above-mentioned adsorber, the adsorber includes an adsorber body, the accommodating space is located inside the adsorber body, the adsorber gas inlet and the adsorber gas outlet are arranged on the adsorber body, The adsorber body is also provided with a feed port and a discharge port; it also includes a belt conveyor with a conveyor belt, which is arranged in the accommodation space of the adsorber body; wherein, the belt conveyor The feeder is used to receive the activated carbon production raw material entering from the feed inlet, and transport the activated carbon production raw material to the discharge port to discharge the adsorber body. The activated carbon production raw material is in the process of conveying contact with the incoming exhaust gas, and block the flow of the exhaust gas.

The above-mentioned adsorber, the adsorber also includes a feed bin, which is arranged at the feed inlet; The conveyor cooperates to limit the thickness of the activated carbon production raw material on the conveyor belt of the belt conveyor.

In the above-mentioned adsorber, the limiting device cooperates with the belt conveyor to limit the thickness of the activated carbon production raw material on the conveyor belt of the belt conveyor to 100-1000 mm; One end of the conveyor belt of the belt conveyor is located at the inlet, and the other end is located at the outlet. The conveying speed is controlled by the distance, so that the residence time of the activated carbon production raw materials on the conveying belt is: 1-5h.

The above-mentioned adsorber also includes a screw discharger, located at the discharge port, for discharging the activated carbon production raw material for adsorbing pollutants out of the adsorber body.

Compared with the prior art, the present invention has the following advantages:

1. The present invention is a method for purification and comprehensive utilization of tail gas produced by chemical method activated carbon, comprising the following steps: contacting activated carbon production raw materials with the tail gas discharged from activated carbon production equipment, thereby making activated carbon production raw materials to the described tail gas The pollutants that can be used for activated carbon production are adsorbed and recovered. Since the tail gas, that is, most of the pollutants in the waste gas are in an unstable state such as an aerosol state or entrained by water vapor, the process of using activated carbon production raw materials to directly contact the gas can make the purification of the pollutants in the tail gas and The recovery rate is high, that is, the ratio between the pollutants that are finally adsorbed on the raw materials for activated carbon production and the amount of pollutants in the tail gas discharged from the activated carbon production equipment is relatively large.

After at least one of phosphoric acid, hydrogen chloride, zinc chloride and wood tar contained in the pollutants is recovered by this method, the raw materials for activated carbon production obtained can be directly used in subsequent activated carbon production without causing the pollution waste, and will not cause secondary pollution. Among them, activated carbon production raw materials that absorb at least one pollutant in phosphoric acid, hydrogen chloride, zinc chloride and wood tar can be used in the activated carbon production process; and activated carbon production raw materials The adsorbed wood tar can be further used as a raw material for the production of activated carbon for subsequent production of activated carbon.

At the same time, the method has simple process, uncomplicated equipment and low operation cost, and is easy to be popularized in the activated carbon industry.

2. The initial temperature of the activated carbon production tail gas is 30-250° C., which can facilitate the adsorption of at least one pollutant in phosphoric acid, hydrogen chloride, zinc chloride and wood tar by the chemical method activated carbon production raw materials.

3. The temperature of the tail gas fed into the adsorber is 60-240°C, which can directly benefit the high-temperature production tail gas to dry some wet activated carbon production raw materials, reduce the moisture contained in the activated carbon production raw materials, so that the dry and The activated carbon production raw material that has adsorbed at least one pollutant in phosphoric acid, hydrogen chloride, zinc chloride and wood tar can be directly applied to the subsequent activated carbon production process, that is, the present invention purifies the tail gas and recovers the pollutants in the tail gas for subsequent activated carbon Production, compared with the prior art using the spray method for tail gas treatment and subsequent activated carbon production process, the drying process for raw materials for activated carbon production is reduced, thereby simplifying the entire process steps and saving production costs.

4. The activated carbon production equipment in the prior art is usually larger in size, and the volume of the adsorber is usually larger, and the adsorber is usually set away from the activated carbon production equipment, and the tail gas produced by activated carbon needs to be transported by pipelines. The device used to transmit the exhaust gas is usually a metal pipe, which will cause the temperature of the gas to drop suddenly during the process of outputting the high-temperature gas. The step of maintaining the temperature of the tail gas discharged from the activated carbon production equipment through a temperature maintaining device, so that the temperature drop between the tail gas output from the temperature maintaining device and the tail gas entering the temperature maintaining device is less than 30%. It can effectively avoid that in the process of outputting the tail gas from the activated carbon production equipment to the adsorber, the pollutants such as chemical activators entrained by water vapor in the tail gas will be cooled to liquid due to the sudden drop in temperature of the tail gas, and cannot be brought into the adsorbent by water vapor. In the above-mentioned adsorber, the amount of chemical activator contacted by the adsorber is greatly reduced compared with the amount discharged from the activated carbon production equipment, and the recovery rate of the chemical activator recovery of the exhaust gas by the adsorber is greatly reduced. technical problem. By controlling the temperature drop within a range of less than 30%, such technical problems can be largely avoided, ensuring a relatively high recovery rate.

5. The tail gas discharged from the activated carbon production equipment is heated by a heating device. On the one hand, it can avoid the technical problems caused by the sudden drop in temperature during the transportation of the tail gas mentioned in point 4. It is also possible to increase the temperature of the tail gas entering the adsorber, thereby further drying the moist raw material for activated carbon production, so as to directly obtain the ideal dry activated carbon production raw material adsorbed with chemical activators.

6. The temperature of the exhaust gas fed into the adsorber is 60-240° C., which can effectively dry the raw materials for activated carbon production, so that the ideal dry raw materials for activated carbon production with adsorbed chemical activators can be directly obtained subsequently.

7. The temperature of the tail gas passed into the adsorber is 100-230°C, which can more effectively avoid the technical problems in the above-mentioned point 4, and can also more effectively dry the raw materials for activated carbon production, so as to promote subsequent It is possible to directly obtain the ideal dry activated carbon production raw material adsorbed with pollutants that can be used for activated carbon production.

8. The initial temperature of the exhaust gas is 30-90°C, and the exhaust gas is heated by the heating device to raise the temperature by at least 20%. As a more preferred embodiment, the technical problems in the above-mentioned point 4 can be effectively avoided , it is also possible to more effectively dry the raw materials for activated carbon production, so that the ideal dry activated carbon production raw materials can be directly obtained after adsorption of the pollutants that can be used for the production of activated carbon.

9. The recovery system of the present invention comprises: an adsorber equipped with activated carbon production raw materials, having an adsorber gas inlet and an adsorber gas outlet, and the adsorber gas inlet communicates with the tail gas outlet of the activated carbon production equipment for making activated carbon production The raw material is contacted with the tail gas emitted from the activated carbon production equipment. This design can greatly simplify the equipment, reduce the process cost and achieve the effect of environmental protection while improving the recovery rate of the pollutants in the tail gas that can be used for the production of activated carbon.

10. The adsorber includes an adsorber body, the gas inlet of the adsorber and the gas outlet of the adsorber are arranged on the body of the adsorber, and the body of the adsorber is also provided with a feed port and a discharge port port; also includes a belt conveyor with a conveyor belt, located inside the adsorber body; wherein, the belt conveyor is used to receive the activated carbon production raw materials entering from the feed inlet, and The activated carbon production raw material is transported to the discharge port to discharge the adsorber body, and the activated carbon production raw material is in contact with the tail gas entering during the transportation process, and the flow of the tail gas is blocked. The above design can make the pollutants in the tail gas passed to the activated carbon production raw materials be intercepted and adsorbed by the activated carbon production raw materials.

11. The recovery system of the present invention, wherein, the thickness of the activated carbon production raw material located on the conveyor belt is: 100-1000mm; the flow velocity of the tail gas entering the adsorber is: 0.1-0.8m/s; The residence time of the material on the conveyor belt is: 1-5h. Not only can the activated carbon production raw materials effectively block and adsorb the pollutants in the tail gas, but also more activated carbon production raw materials can absorb the pollutants, and more activated carbon with adsorbates can be obtained. Production of raw materials for subsequent activated carbon production.

Description of drawings

In order to make the content of the present invention more easily understood, the present invention will be described in further detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

Fig. 1 is the schematic diagram of the recycling system of one embodiment of the present invention;

Fig. 2 is the schematic diagram of the recovery system of a kind of preferred embodiment of the present invention;

Fig. 3 is the schematic diagram of the recovery system of a kind of more preferred embodiment of the present invention;

Fig. 4 is a schematic diagram of a recycling system in a more preferred embodiment of the present invention.

Fig. 5 is the schematic diagram of adsorber of the present invention;

1-activated carbon production equipment; 2-adsorber; 3-temperature maintenance device; 4-raw material for activated carbon production; 5-fan; 6-heating device; 7-feed bin; 8-adsorber gas inlet; Feeder; 10-screw discharge machine; 11-conveyor belt; 12-accommodation space 13-feeding port, 14-slag discharge port; 15-adsorber body.

detailed description

Example 1

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting the raw materials for activated carbon production with the tail gas discharged from activated carbon production equipment, so that the raw materials for activated carbon production can be used for the production of activated carbon in the tail gas The pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 30°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like.

Example 2

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 40°C. The activated carbon production raw material is preferably crushed carbon-containing plants, and the crushed carbon-containing plants include at least one of furfural bagasse, bagasse, orange stalks, fruit shells, and wood chips.

Example 3

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 50°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like.

Example 4

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 60°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like.

Example 5

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 70°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 60°C.

Example 6

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 80°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 70°C.

Example 7

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 90°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 80°C.

Example 8

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 100°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 90°C.

Example 9

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 105°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 100°C.

Example 10

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 110°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 100°C.

Example 11

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 120°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 110°C.

Example 12

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 150°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 130°C.

Example 13

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 160°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 150°C.

Example 14

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 180°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 160°C.

Example 15

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 240°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 230°C.

Example 16

A method for purifying and recovering tail gas from chemical activated carbon production of the present invention comprises the following steps: contacting activated carbon production raw materials with tail gas discharged from activated carbon production equipment, so that activated carbon production raw materials can be used for activated carbon in the tail gas Produced pollutants are adsorbed and recovered, wherein the pollutants include at least one of phosphoric acid, hydrogen chloride, zinc chloride, and wood tar. The activated carbon production raw material is preferably placed in an adsorber, and the tail gas is input into the adsorber for adsorption. The initial temperature of the tail gas is preferably 250°C. The activated carbon production raw material is preferably carbon-containing plant crushed matter, and the carbon-containing plant crushed matter includes at least one of furfural bagasse, bagasse, orange stalk crushed fruit core shell crushed wood chips and the like. The temperature of the tail gas passed into the adsorber is 240°C.

Example 17

A method for purifying and recovering tail gas produced by chemical activated carbon of the present invention, on the basis of any one of the above-mentioned embodiments, also includes a method for maintaining the temperature of the tail gas discharged from the activated carbon production equipment through a temperature maintaining device Step, making the temperature drop between the tail gas output from the temperature maintaining device and the tail gas entering the temperature maintaining device less than 30%. The temperature drop=(input temperature value of the tail gas−output temperature value of the tail gas)/input temperature value of the tail gas, and the unit of the temperature value is Celsius. The thickness of the activated carbon production raw material is: 100-1000mm; the flow velocity of the tail gas entering the adsorber is: 0.1-0.8m/s; the residence time of the material on the conveyor belt is: 1-5h. The thickness of the activated carbon production raw material, the flow velocity of the tail gas and the residence time of the material on the conveyor belt can be combined to realize that the pollutants in the tail gas can be blocked by the activated carbon production raw material, while other gases can pass through the Activated carbon production raw materials are discharged.

Example 18

On the basis of any one of the embodiments 1-3, the method for purifying and recovering tail gas produced by chemical method activated carbon according to the present invention also includes: heating the tail gas discharged from the activated carbon production equipment through a heating device heating. Preferably, the tail gas is heated to 60-240°C, more preferably to 100-230°C.

When the initial temperature of the tail gas is 30-90° C., as another more preferred embodiment, the temperature of the tail gas is heated by at least 20% by the heating device. The calculation method of the percentage is: (temperature value of the tail gas after heating−temperature value of the tail gas before heating)/temperature value of the tail gas before heating, and the unit of the temperature value is Celsius.

Example 19

As shown in Fig. 1, the purification and recovery system of a kind of chemical activated carbon production tail gas of the present invention comprises: adsorber 2, activated carbon production raw material 4 is housed, has adsorber gas inlet and adsorber gas outlet, described adsorber 2 The gas inlet communicates with the tail gas outlet of the activated carbon production equipment 1. Preferably, it includes: a temperature maintaining device 3, which has a gas inlet of the maintaining device and a gas outlet of the maintaining device, and is arranged between the activated carbon production equipment 1 and the adsorber 2, wherein the gas inlet of the maintaining device and the activated carbon production equipment The tail gas outlet of 1 is connected, and the gas outlet of the holding device is connected with the gas inlet of the adsorber; it is used to make the temperature drop between the tail gas output from the temperature holding device and the tail gas entering the temperature holding device less than 30%. The temperature drop=(input temperature value of the tail gas−output temperature value of the tail gas)/input temperature value of the tail gas, and the unit of the temperature value is Celsius.

As a preferred embodiment, as shown in Figure 2, it may also include: a fan 5, arranged between the activated carbon production equipment 1 and the adsorber 2, preferably between the activated carbon production equipment and the temperature maintaining device , for driving the tail gas into the adsorber 2 . As another alternative implementation manner, the blower may also be arranged at the rear end of the adsorber for introducing the tail gas into the adsorber and then discharging it.

In addition, as an improved implementation, it may further include: a fan controller for constant control of the output power of the fan.

Example 20

As shown in Fig. 3, a kind of purification and the recovery system of tail gas produced by chemical method activated carbon of the present invention, comprise: adsorber 2, activated carbon production raw material 4 is housed, have adsorber gas inlet and adsorber gas outlet, described adsorber The gas inlet communicates with the tail gas outlet of the activated carbon production equipment 1 . Preferably, it also includes: a heating device 6, which has a heating device gas inlet and a heating device gas outlet, and is arranged between the activated carbon production equipment 1 and the adsorber 2, and is used to treat the tail gas before passing into the adsorber 2. for heating. It may also include: a fan 5, arranged between the activated carbon production equipment 1 and the adsorber 2, preferably between the heating device 6 and the adsorber 2, for driving the tail gas into the adsorber 2 in. As another alternative implementation manner, the blower may also be arranged at the rear end of the adsorber for introducing the tail gas into the adsorber and then discharging it.

Preferably, a temperature detection device (not shown) is also included, which is located near the gas inlet of the heating device, and is used to detect the temperature of the tail gas entering the heating device to obtain temperature information, and the heating device according to the The temperature information detected by the temperature detection device controls the heating power of the heating device. When the heating device is preferably when the initial temperature of the exhaust gas is 30-90°C, the heating device heats the exhaust gas to at least 20%.

In addition, as an improved implementation, it may further include: a fan controller, configured to perform constant control on the output power of the fan.

Example 21

As shown in Figure 4, a kind of purification and the recovery system of the exhaust gas of chemical process active carbon production of the present invention, comprise: adsorber 2, have the accommodating space 12 that is used to accommodate the raw material 4 of active carbon production, have adsorber gas inlet and adsorber gas The gas inlet of the adsorber communicates with the exhaust gas outlet of the activated carbon production equipment, and is used to contact the activated carbon production raw materials with the exhaust gas discharged from the activated carbon production equipment. Preferably, it includes: a heating device 6 , which has a heating device gas inlet and a heating device gas outlet, is arranged between the activated carbon production equipment and the adsorber, and is used to heat the tail gas before passing into the adsorber 2 .

Preferably, it also includes: a temperature maintaining device 4, which has a gas inlet of the maintaining device and a gas outlet of the maintaining device, and is arranged between the activated carbon production equipment 1 and the adsorber 2, wherein the gas inlet of the maintaining device is connected with the activated carbon production The tail gas outlet of the equipment 1 is connected, and the gas outlet of the holding device is connected with the gas inlet of the adsorber, so as to make the temperature between the tail gas output from the temperature holding device and the tail gas entering the temperature holding device drop less than 30%.

It may also include: at least two blowers 5, respectively arranged between the activated carbon production equipment and the adsorber and at the rear end of the adsorber, for maintaining the balance of wind pressure before and after the adsorber.

Preferably, a temperature detection device (not shown) is also included, which is located near the gas inlet of the heating device, and is used to detect the temperature of the tail gas entering the heating device to obtain temperature information, and the heating device according to the The temperature information detected by the temperature detection device controls the heating power of the heating device. When the heating device is preferably when the initial temperature of the exhaust gas is 30-90°C, the heating device heats the exhaust gas to at least 20%. The calculation method of the percentage is: (temperature value of the tail gas after heating−temperature value of the tail gas before heating)/temperature value of the tail gas before heating, and the unit of the temperature value is Celsius.

In addition, as an improved implementation, it may further include: a fan controller, configured to perform constant control on the output power of the fan.

As yet another improved implementation, as shown in Figure 5, the purification and recovery system of this embodiment, wherein the adsorber includes an adsorber body 15, and the accommodation space 12 is located inside the adsorber body 15 , the adsorber gas inlet 8 and the adsorber gas outlet (not marked here) are located on the adsorber body 15, and the adsorber body 15 is also provided with a feed port 13 and an outlet Feed port (not marked); also includes a belt feeder 9 with a conveyor belt 11, located in the accommodation space 12 of the adsorber body 15; wherein, the belt feeder 9 is used for Receive the activated carbon production raw material 4 that enters from the feed inlet 13, and transport the activated carbon production raw material 4 to the discharge port to discharge the adsorber body 15, and the activated carbon production raw material 13 is transported Contact with the tail gas entering during the process, wherein, in order to achieve contact, the flow direction of the tail gas entering the adsorber can be parallel or vertical to the movement of the activated carbon production raw material; preferably, the activated carbon production raw material can be Realize blocking the flow of the tail gas, the preferred flow direction of the tail gas entering the adsorber is perpendicular to the direction of motion of the activated carbon production raw material, and flows to the activated carbon production raw material, more preferably, the The gas inlet of the adsorber is arranged directly above the adsorber body, and the tail gas flows from top to bottom to the activated carbon production raw material. In addition, the adsorber also preferably includes a feed bin 7, which is located at the feed port 13; a limiting device (not marked here), is located at the feed bin 7 or the feed port is used to cooperate with the belt conveyor 9 to limit the thickness of the activated carbon production raw material 4 on the conveyor belt 11 of the belt conveyor.

For the purification and recovery system of the present invention, the limiting device cooperates with the belt conveyor to limit the thickness of the activated carbon production raw material on the conveyor belt of the belt conveyor to 100 -1000mm; one end of the conveyor belt of the belt conveyor is located at the inlet, and the other end is located at the outlet. The distance of the discharge port controls the conveying speed, so that the residence time of the activated carbon production raw material on the conveyor belt is: 1-5h, and the fan controller is suitable for controlling the flow rate of the tail gas entering the adsorber to be : 0.1-0.8m/s.

The thickness of the activated carbon production raw material, the flow velocity of the tail gas and the residence time of the material on the conveyor belt can be combined to realize that the pollutants in the tail gas can be blocked by the activated carbon production raw material, while other gases can pass through the Activated carbon production raw materials are discharged. The discharge port is further provided with a screw discharge machine 10 for discharging the activated carbon production raw materials adsorbed with the pollutants out of the discharge port. A slag outlet 14 is also provided at the bottom of the adsorber.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the present invention.

Claims (1)

1. a kind of purification and recovery system for active carbon by chemical method production tail gas, including：

Absorber, there is the receiving space, absorber gas access and the absorber gas that are used to accommodate Activated Carbon Production raw material to go out Mouthful, the absorber gas access is suitable to connect with the offgas outlet of active carbon production equipment, for making Activated Carbon Production raw material Contacted with the tail gas given off in active carbon production equipment so that Activated Carbon Production raw material in the tail gas can Pollutant for Activated Carbon Production is adsorbed and reclaimed；

Wherein, the absorber includes absorber body, and the receiving space is located at the absorber body interior, the absorption Device gas access and the absorber gas vent are additionally provided with charging on the absorber body on the absorber body Mouth and discharging opening；Also include the belt conveyer with conveyer belt, in the receiving space of the absorber body；Its In, the belt conveyer is used to receive the Activated Carbon Production raw material entered from the charging aperture, and by the activated carbon Raw materials for production are delivered to the discharge outlet and discharge the absorber body, and the Activated Carbon Production raw material is during conveying Contacted with the tail gas of entrance, and the flowing to the tail gas obstructs；

The absorber also includes feeding warehouse, at the charging aperture；Stopping means, located at the feeding warehouse or the charging At mouthful, for being coordinated with the belt conveyer, limitation work on the conveyer belt of the belt conveyer The thickness of property charcoal raw materials for production；

It is characterized in that：

The stopping means is coordinated with the belt conveyer, for by positioned at the conveyer belt of the belt conveyer The thickness of the upper Activated Carbon Production raw material is limited to 100-1000mm；Described conveyer belt one end of the belt conveyer is located at At the charging aperture, the other end is located at the discharge outlet, and the belt conveyer is according to the charging aperture and the discharging opening Distance transporting velocity is controlled so that the residence time is the Activated Carbon Production raw material on the conveyor belt：1-5h, and wind Machine controller is suitable to：0.1-0.8m/s；

Also include temperature holding meanss, there is holding meanss gas access and holding meanss gas vent, located at the activated carbon Between production equipment and the absorber, wherein, the holding meanss gas access and the tail gas of the active carbon production equipment go out Mouth connection, the holding meanss gas vent connect with the absorber gas access, for keep filling from the temperature Put the tail gas of output and be less than 30% into the temperature drop between the tail gas of the temperature holding meanss.