CN217368429U - High-efficient regeneration system of wooden powder active carbon that contains salt - Google Patents

Abstract

The utility model relates to a high wooden powder active carbon high-efficient regeneration system that contains salt, its characterized in that: including mixing pond, spiral scrubber, membrane filter press, conveyer, mixing granulator, drying-machine, many thorax stoves and regeneration charcoal aftertreatment unit, mixing pond be connected to spiral scrubber through a elevator pump, the discharge gate of spiral scrubber is connected to membrane filter press's feed inlet, the discharge gate department of membrane filter press is connected to the feed inlet of mixing the granulator through the conveyer, connects the drying-machine in the discharge gate department of mixing the granulator, the feeder hopper of many thorax stoves is connected to the discharge gate of drying-machine, the discharge gate department of many thorax stoves connects regeneration charcoal aftertreatment unit. The utility model discloses face moisture content height, unable use gas to sweep the scheduling problem among the regeneration process when not only having solved powdered activated carbon regeneration, still can produce the higher wooden powdered activated carbon of quality and reduce regeneration energy consumption.

Description

High-efficient regeneration system of wooden powder active carbon that contains salt

Technical Field

The utility model belongs to the technical field of the active carbon regeneration, a high-efficient regeneration system of wooden powder active carbon that contains salt is related to.

Background

The powdered activated carbon is a nontoxic and tasteless adsorbing material with a well-developed pore structure and a large specific surface area, has strong adsorption capacity to molecules, and has been widely applied to a plurality of fields such as medicine, chemical industry, light industry, food, environmental protection and the like as an adsorption decolorant. In the aspect of environmental protection, the activated carbon adsorption is widely applied to the purification of polluted water sources and the advanced treatment of urban sewage and industrial wastewater, and is one of important means for treating organic wastewater. Because the price of the activated carbon is high, the repeated use of the saturated activated carbon is an important factor when selecting an activated carbon adsorption industrial device, and whether the regeneration cost of the saturated activated carbon is low or not must be considered in the repeated use of the activated carbon. The regeneration of the waste carbon not only can realize the recycling of resources, but also can reduce the environmental pollution caused by burning or landfill.

However, due to the special physical properties of the powdered activated carbon, such as light weight and fineness, the waste powdered activated carbon has the problems of high water content during regeneration, incapability of using gas purging during regeneration, and the like. Therefore, the regeneration of the waste powdered activated carbon is difficult.

Aiming at the regeneration of waste powdered activated carbon, a thermal regeneration method is a technology which has wide application range and higher input yield at present, but the general problem is that the waste carbon enters a regeneration furnace for regeneration without pretreatment, so that the quality of the regenerated carbon is lower and the energy consumption is higher.

In addition, because the high-salt-content waste activated carbon has high salt content, the waste activated carbon is thermally regenerated without carbon washing pretreatment, and the obtained regenerated carbon has poor quality, low iodine value and poor adsorption performance.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a high-efficient regeneration system of salt powder active carbon that contains, this technique face moisture content height, unable use gas in the regeneration process when not only having solved powder active carbon regeneration and sweep the scheduling problem, still can produce the higher wooden powder active carbon of quality and reduce the regeneration energy consumption.

The utility model provides a its technical problem realize through following technical scheme:

the utility model provides a high wooden powder active carbon high efficiency regeneration system that contains salt which characterized in that: including mixing pond, spiral scrubber, membrane filter press, conveyer, mixing granulator, drying-machine, many thorax stoves and regeneration charcoal aftertreatment unit, mixing pond be connected to spiral scrubber through a elevator pump, the discharge gate of spiral scrubber is connected to membrane filter press's feed inlet, membrane filter press's discharge gate department is connected to the feed inlet of mixing the granulator through the conveyer, connects the drying-machine in the discharge gate department of mixing the granulator, the feeder hopper of many thorax stoves is connected to the discharge gate of drying-machine, the discharge gate department of many thorax stoves connects regeneration charcoal aftertreatment unit.

The multi-hearth furnace comprises a furnace body, a central shaft, material rakes and a hearth, wherein the central shaft driven by a motor to rotate is arranged in the middle of the furnace body, the material rakes are uniformly distributed on the central shaft at intervals, a blower is arranged at the bottom of the central shaft and is used for introducing cooling air into the central shaft to cool the central shaft and the material rakes, an upper pipe orifice of the central shaft forms a central shaft air outlet, a furnace chamber is formed in the area from the outside of the central shaft to the inner wall of the furnace body, the furnace chamber is respectively a drying area, a pyrolysis area, an activation area and a cooling area from top to bottom, a feed hopper is arranged at the top of the furnace chamber, a discharge port is arranged at one end of the bottom of the furnace chamber far away from the feed hopper, burners are respectively arranged at the positions on the furnace chamber corresponding to the drying area, the pyrolysis area and the activation area, combustion-supporting air inlets and natural gas inlets are arranged at the burners, a circulating flue gas outlet is arranged at the top of the drying area on the furnace chamber, this circulation exhanst gas outlet is connected to the circulation flue gas entrance of locating the cooling space department through circulating line, is equipped with circulating fan on circulating line, and the position that corresponds activation district and cooling space all is provided with the vapor entry, is provided with regeneration exhanst gas outlet and air supplement mouth respectively in the position that corresponds the pyrolysis space.

The top of the second combustion chamber is provided with an emergency smoke discharge pipeline with an upper opening and a lower opening, and the side wall of the emergency smoke discharge pipeline is provided with a smoke inlet; the left end and the right end of the chamber wall of the secondary combustion chamber are respectively provided with a burner, a combustion-supporting air inlet and a natural gas inlet are arranged at each burner, and the two burners are positioned at the upper end of the secondary air inlet; the regenerated flue gas outlet is connected to a flue gas inlet on the secondary combustion chamber through a pipeline, a middle shaft air outlet at the upper end of the middle shaft is respectively connected with secondary air inlets positioned at two sides of the secondary combustion chamber through pipelines, a flue gas outlet is arranged at the lower end of the secondary combustion chamber and is connected with a flue gas inlet of a waste heat boiler, steam generated by the waste heat boiler is supplied to the multi-hearth furnace and the dryer, and flue gas at the outlet of the waste heat boiler is discharged after being treated by a tail gas treatment device.

And, the regenerated carbon after-treatment unit include cooling drum, rubbing crusher, conveyer and finished product jar, the discharge gate of many thorax stoves is relative with cooling drum's feed inlet through the conveyer, and cooling drum's discharge gate is connected to finished product jar through rubbing crusher.

The utility model discloses an advantage and beneficial effect do:

according to the high-efficiency regeneration system for the high-salt-content wood powder activated carbon, the waste powder activated carbon is subjected to material melting and then is subjected to acid washing and water washing in the spiral washer, soluble ash in the waste carbon can be dissolved in washing liquid, and large-particle impurities, scrap iron and the like can be intercepted; the spiral washer realizes synchronous carbon washing and screening, improves the treatment efficiency and reduces the system failure rate; dehydrating the waste powdered activated carbon by using a filter press to reduce the water content of the waste carbon and filtering soluble ash in filtrate to remove the soluble ash; the ash content in the waste carbon is reduced in the carbon washing and dehydrating process, and a foundation is laid for the subsequent production of high-quality regenerated carbon; the waste powdered activated carbon is prepared into particles, then the particles are dried by a dryer and then regenerated by a multi-hearth furnace, so that the problem that the powdered activated carbon is small in particle size and difficult to regenerate is solved, the moisture content in the furnace is reduced, and the energy consumption and carbon loss in the activated carbon regeneration process are further reduced; the multi-hearth furnace flue gas recirculation, the partial combustion in the pyrolysis gas furnace chamber and the middle shaft air recycling not only reduce the regeneration energy consumption and the water vapor consumption, but also further reduce the tail gas treatment load. In addition, the dryer takes the steam generated by the introduced tail gas treatment device as a heat source, thereby not only realizing the reutilization of heat energy, but also further assisting the molding of the granulated activated carbon after granulation by the steam; after drying, the carbon enters a multi-hearth furnace, so that the mechanical strength of the formed activated carbon can be improved.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic structural view of the multi-hearth furnace of the present invention connected to a second combustion chamber;

fig. 3 is an enlarged view of fig. 2 from a-a.

Fig. 4 is a process flow chart of the present invention.

Description of reference numerals:

1-a mixing tank, 2-a spiral washer, 3-a diaphragm filter press, 4-a conveyor, 5-a mixing granulator, 6-a dryer, 7-a feed hopper, 8-a multi-hearth furnace, 9-a regenerated carbon post-treatment unit, 10-a tail gas treatment device, 11-a circulating flue gas outlet, 12-a regenerated flue gas outlet, 13-a middle shaft and 14-a rake arm, 15-steam inlet, 16-rake teeth, 17-hearth, 18-discharge port, 19-natural gas inlet, 20-combustion-supporting air inlet, 21-air supplement port, 22-burner, 23-feed port, 24-flue gas inlet, 25-emergency exhaust flue gas pipeline, 26-secondary air inlet, 27-flue gas outlet and 28-circulating flue gas inlet.

Detailed Description

The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.

The high-efficiency regeneration system for the wood powder activated carbon with high salt content is characterized in that: including mixing pond 1, spiral scrubber 2, membrane filter press 3, conveyer 4, mixing granulator 5, drying-machine 6, many thorax stove 8 and regeneration charcoal aftertreatment unit 9, be provided with the agitator that is used for the material stirring in mixing the pond, mixing the pond and be connected to spiral scrubber through a elevator pump, spiral scrubber's discharge gate is connected to membrane filter press's feed inlet, and membrane filter press's discharge gate department is connected to mixing the feed inlet of granulator through the conveyer, connects the drying-machine in the discharge gate department of mixing the granulator, and the feeder hopper 7 of many thorax stoves is connected to the discharge gate of drying-machine, and regeneration charcoal aftertreatment unit is connected to the discharge gate department of many thorax stoves.

The multi-hearth furnace comprises a furnace body, a middle shaft 13, a rake and a hearth 17, wherein the middle part of the furnace body is provided with the middle shaft which is driven by a motor to rotate, the rake is evenly distributed on the middle shaft at intervals, the bottom of the middle shaft is provided with a blower which is used for introducing cooling air into the middle shaft to cool the middle shaft and the rake, the upper pipe orifice of the middle shaft forms a middle shaft air outlet, the area between the outside of the middle shaft and the inner wall of the furnace body forms a furnace chamber, the furnace chamber is respectively provided with a drying area, a pyrolysis area, an activation area and a cooling area from top to bottom, the top of the furnace chamber is provided with a feed inlet, a feed hopper is arranged at a feed inlet 23, one end of the bottom of the furnace chamber, far away from the feed hopper, is provided with a discharge outlet 18, burners 22 are respectively arranged at positions corresponding to the drying area, the pyrolysis area and the activation area on the furnace chamber, combustion-supporting air inlets 20 and natural gas inlets 19 are respectively arranged at each burner, the top of the drying area on the furnace chamber is provided with a circulating flue gas outlet 11, the circulating flue gas outlet is connected to a circulating flue gas inlet 28 arranged at the cooling area through a circulating pipeline, a circulating fan is arranged on the circulating pipeline, the positions corresponding to the activation area and the cooling area are both provided with a water vapor inlet 15, and the positions corresponding to the pyrolysis area are respectively provided with a regeneration flue gas outlet 12 and an air supplement port 21. The material rake consists of a rake arm 14 and rake teeth 16, the outer wall of the middle shaft is fixedly provided with a rake wall which is transversely arranged, and the lower end surface of the rake arm is uniformly distributed with a plurality of rake teeth at intervals.

The device also comprises a secondary combustion chamber and a tail gas treatment device 10, wherein an emergency smoke discharge pipeline 25 with an upper opening and a lower opening is arranged at the top of the secondary combustion chamber, and a smoke inlet 24 is arranged on the side wall of the emergency smoke discharge pipeline; burners are respectively arranged at the left end and the right end of the chamber wall of the second combustion chamber, a combustion-supporting air inlet and a natural gas inlet are respectively arranged at each burner, and the two burners are both positioned at the upper end of the secondary air inlet 26; the regeneration flue gas outlet is connected to a flue gas inlet on the secondary combustion chamber through a cyclone dust collector, a middle shaft air outlet at the upper end of a middle shaft is respectively connected with secondary air inlets positioned at two sides of the secondary combustion chamber through pipelines, a flue gas outlet 27 is arranged at the lower end of the secondary combustion chamber and is connected with a flue gas inlet of a waste heat boiler, steam generated by the waste heat boiler is supplied to the multi-hearth furnace and the dryer, and flue gas at the outlet of the waste heat boiler is discharged after being treated by a tail gas treatment device.

The regenerated carbon post-treatment unit comprises a cooling roller, a crusher, a conveyor and a finished product tank, wherein the discharge port of the multi-hearth furnace is opposite to the feed port of the cooling roller through the conveyor, and the discharge port of the cooling roller is connected to the finished product tank through the crusher.

The method takes waste powdered activated carbon as a raw material, and regenerates the waste powdered activated carbon by using a multi-hearth furnace, and comprises the following steps:

(1) the method comprises the following steps of (1) removing bags of waste powdered carbon through a bag breaker, then dropping the waste powdered carbon into a mixing tank filled with water for material melting, wherein the solid content of the waste powdered carbon and the water is 25%, and the waste powdered carbon is completely immersed in the water under the assistance of a stirrer to obtain powdered activated carbon slurry;

(2) conveying the powder activated carbon slurry to a spiral washer through a lifting pump for carbon washing and screening, and stopping washing when the pH of washing effluent is 6-9 and the salinity is not higher than 1% to obtain the powder activated carbon slurry after carbon washing; the carbon washing comprises acid washing and water washing, namely acid washing liquid is injected into the spiral washer for one time of acid washing, and then clear water is injected into the spiral washer for one time of water washing;

(3) sending the powder activated carbon slurry after carbon washing to a feeding tank of a filter press for caching, then lifting to a membrane filter press for dehydration through a pump, and stopping dehydration until the water content is 40-50% to obtain dehydrated powder activated carbon;

(4) feeding the dehydrated powdered activated carbon to a mixing granulator, wherein the mixing granulator is composed of a mixer and a double-screw granulator, uniformly mixing the dehydrated powdered activated carbon with a prepared adhesive in the mixer, and then granulating and forming in the double-screw granulator, wherein the weight of the adhesive accounts for 5% of the dry basis of the dehydrated powdered activated carbon to obtain granular activated carbon;

(5) conveying the granular activated carbon to a dryer through a belt for drying until the water content is reduced to be below 10%, and obtaining dried granular carbon;

(6) feeding the dried granular carbon to a multi-hearth furnace for further drying, pyrolysis and activation to obtain hot granular carbon; the water vapor in the dry flue gas is utilized in the multi-hearth furnace, and the dry flue gas is conveyed to a cooling area of the multi-hearth furnace through a circulating fan; part of pyrolysis gas generated in the pyrolysis process of the waste activated carbon is combusted and then sent into a secondary combustion chamber for further combustion; sending the middle shaft air into a secondary combustion chamber to be used as secondary air; and (3) delivering the regenerated flue gas generated by the multi-hearth furnace to a secondary combustion chamber through a cyclone dust collector, delivering the high-temperature flue gas generated by the secondary combustion chamber to a waste heat boiler for waste heat recovery to generate saturated steam, and treating the flue gas at the outlet of the waste heat boiler by a tail gas treatment device and then discharging.

(7) Sending the hot granular carbon to a cooling roller for cooling to obtain regenerated granular carbon;

(8) and (3) delivering the regenerated granular carbon to a grinder to be ground to 100 meshes to obtain the regenerated wood powder activated carbon.

Compared with the direct thermal regeneration process of powdered carbon, the regeneration process of the high-salt wood powder activated carbon not only solves the problem that the particle size of the powdered activated carbon is small and difficult to regenerate, but also reduces the moisture content and harmful components entering the furnace, further reduces the energy consumption and carbon loss in the regeneration process of the activated carbon, and improves the quality of the regenerated carbon; in addition, the dryer not only realizes the reutilization of heat energy by introducing steam generated by the tail gas treatment device as a heat source, but also further assists the molding of the granulated activated carbon after granulation by the steam; the novel multi-hearth furnace is adopted to regenerate the granular activated carbon, so that the energy consumption is reduced, the water vapor consumption in the activation process is reduced, and the treatment load of a subsequent tail gas treatment device is further reduced.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.

Claims (4)

1. The utility model provides a high wooden powder active carbon high-efficient regeneration system that contains salt which characterized in that: including mixing pond, spiral scrubber, membrane filter press, conveyer, mixing granulator, drying-machine, many thorax stoves and regeneration charcoal aftertreatment unit, mixing pond be connected to spiral scrubber through a elevator pump, the discharge gate of spiral scrubber is connected to membrane filter press's feed inlet, membrane filter press's discharge gate department is connected to the feed inlet of mixing the granulator through the conveyer, connects the drying-machine in the discharge gate department of mixing the granulator, the feeder hopper of many thorax stoves is connected to the discharge gate of drying-machine, the discharge gate department of many thorax stoves connects regeneration charcoal aftertreatment unit.

2. The high-efficiency regeneration system for activated carbon containing high salt wood powder as claimed in claim 1, wherein: the multi-hearth furnace comprises a furnace body, a middle shaft, a rake and a hearth, wherein the middle part of the furnace body is provided with the middle shaft driven by a motor to rotate, the rake is uniformly distributed on the middle shaft at intervals, the bottom of the middle shaft is provided with a blower, the blower is used for introducing cooling air into the middle shaft to cool the middle shaft and the rake, the upper pipe orifice of the middle shaft forms a middle shaft air outlet, the area between the outside of the middle shaft and the inner wall of the furnace body forms a furnace chamber, the furnace chamber is respectively provided with a drying area, a pyrolysis area, an activation area and a cooling area from top to bottom, the top of the furnace chamber is provided with a feed hopper, one end of the bottom of the furnace chamber, which is far away from the feed hopper, is provided with a discharge port, burners are respectively arranged on the furnace chamber corresponding to the positions of the drying area, the pyrolysis area and the activation area, combustion-supporting air inlets and natural gas inlets are arranged at the positions of the burners, and the top of the drying area is provided with a circulating flue gas outlet, this circulation exhanst gas outlet is connected to the circulation flue gas entrance of locating the cooling space department through circulating line, is equipped with circulating fan on circulating line, and the position that corresponds activation district and cooling space all is provided with the vapor entry, is provided with regeneration exhanst gas outlet and air supplement mouth respectively in the position that corresponds the pyrolysis space.

3. The high-efficiency regeneration system for activated carbon containing high salt wood powder as claimed in claim 2, wherein: the device comprises a first combustion chamber, a second combustion chamber and a tail gas treatment device, wherein the top of the first combustion chamber is provided with an emergency smoke discharge pipeline with an upper opening and a lower opening, and the side wall of the emergency smoke discharge pipeline is provided with a smoke inlet; burners are respectively arranged at the left end and the right end of the chamber wall of the second combustion chamber, a combustion-supporting air inlet and a natural gas inlet are respectively arranged at each burner, and the two burners are both positioned at the upper end of the secondary air inlet; the regeneration flue gas outlet is connected to a flue gas inlet on the secondary combustion chamber through a pipeline, a middle shaft air outlet at the upper end of the middle shaft is respectively connected with secondary air inlets positioned at two sides of the secondary combustion chamber through pipelines, a flue gas outlet is arranged at the lower end of the secondary combustion chamber and is connected with a waste heat boiler, steam in the waste heat boiler is supplied to the multi-hearth furnace and the dryer, and tail gas discharged from the waste heat boiler is discharged after being treated by a tail gas treatment device.

4. The high-efficiency regeneration system for the wood powder activated carbon with high salt content according to claim 1, characterized in that: the regenerated carbon post-treatment unit comprises a cooling roller, a crusher, a conveyor and a finished product tank, wherein the discharge port of the multi-hearth furnace is opposite to the feed port of the cooling roller through the conveyor, and the discharge port of the cooling roller is connected to the finished product tank through the crusher.

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