Powdery waste activated carbon regeneration production process

Abstract

The invention discloses a regeneration production process of powdery waste activated carbon. The regeneration production process comprises the following steps: S1, feeding the powdery waste activated carbon into a crushing and drying furnace for crushing and drying; s2, feeding the powdery waste activated carbon into a cyclone separator and a cloth bag separator for solid-gas separation, and then feeding the powdery waste activated carbon into an activation furnace through a feeder for activation; s3, the activation furnace is preheated before feeding, and then high-pressure steam generated by the boiler is fed into the activation furnace; s4, the powdery waste activated carbon is fed into an activation furnace to be activated, then cooling is conducted, and finished activated carbon is separated out; and S5, feeding the finished product activated carbon to a mixing bin, and discharging and bagging the finished product activated carbon. Compared with the traditional method for regenerating the powdery waste activated carbon by using an earth kiln technology, the method can recover the powdery waste activated carbon to the same quality as the original activated carbon by using the physical action of high-temperature activation, and is stable in technology, high in yield, good in finished product quality and high in yield.

Description

Technical Field

[0001] The invention relates to the field of activated carbon regeneration, in particular to a regeneration production process for powdered waste activated carbon. Background Art

[0002] In the prior art, in order to turn waste into treasure, powdered waste activated carbon is usually collected for activation and regeneration. The traditional process is to regenerate powdered waste activated carbon using earth kiln technology, which is cumbersome, unstable, low in yield, and poor in quality, and needs to be optimized and improved. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a regeneration production process for powdered waste activated carbon.

[0004] The technical solution of the present invention is as follows: A powdered waste activated carbon regeneration production process, characterized in that it comprises the following steps:

[0005] S1. After collecting the powdered waste activated carbon, remove the impurities therein, and then send it to the crushing and drying furnace through the feeder for crushing and drying;

[0006] S2, the high-pressure blower sends the crushed and dried powdered waste activated carbon into the cyclone separator and bag separator for solid-gas separation. The separated powdered waste activated carbon is collected in the collection boxes of the cyclone separator and bag separator, and then discharged into the silo. After that, it is sent to the activation furnace through the feeder for activation. The separated waste gas is discharged into the tail gas treatment system for purification.

[0007] S3, the activation furnace is preheated before starting to feed. After preheating to the appropriate temperature, the blowers at the furnace head and furnace tail of the activation furnace are turned on, and then the high-pressure steam generated by the boiler is sent into the activation furnace;

[0008] S4. After the powdered waste activated carbon is sent into the activation furnace, it is activated under the combined action of high temperature and steam, and then sent to the first cooling cylinder for primary cooling, and then sent to the cyclone separator, and the first heavier finished activated carbon is discharged by the discharger of the cyclone separator; the airflow separated by the cyclone separator is sent to the second cooling cylinder for secondary cooling, and then sent to the bag separator, and the second lighter finished activated carbon is discharged by the discharger of the bag separator, and the airflow separated by the bag separator is discharged into the exhaust gas treatment system for purification;

[0009] S5. The two lines of finished activated carbon are transported to the finished cyclone separator and the finished bag separator through negative pressure pipelines. The finished activated carbon is collected in the collecting boxes of the two separators and then sent to the mixing bin through the unloader for unloading and bagging. The finished activated carbon is packaged.

[0010] Furthermore, in step S1, the temperature of the crushing and drying furnace is 300°C, the agitator in the crushing and drying furnace rotates and crushes the powdered waste activated carbon, and the moisture content of the dried powdered waste activated carbon is between 15% and 18%.

[0011] Furthermore, in step S3, the activation furnace is preheated to 300°C, and a plurality of air inlet pipes for introducing high-pressure steam are provided in the activation furnace.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] Compared with the traditional earth kiln technology to regenerate powdered waste activated carbon, this process uses high-temperature activation physical action to restore powdered waste activated carbon to the same quality as original activated carbon. It has stable technology, high yield rate, good finished product quality and high output.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 1 A powdered waste activated carbon regeneration production process shown includes the following steps:

[0021] S1. After collecting the powdered waste activated carbon, remove the impurities therein, and then feed it into a crushing and drying furnace through a feeder for crushing and drying. The temperature of the crushing and drying furnace is about 300°C, for example, 290-310°C. The stirring blade in the crushing and drying furnace rotates and crushes the powdered waste activated carbon. The moisture content of the dried powdered waste activated carbon is between 15% and 18%.

[0022] High-temperature drying can cause part of the organic matter adsorbed on the waste activated carbon to boil, vaporize and desorb, and part of the organic matter to decompose and generate small molecular hydrocarbons that are desorbed.

[0023] S2. The high-pressure fan sends the crushed and dried powdered waste activated carbon into the cyclone separator and bag separator for solid-gas separation. The separated powdered waste activated carbon is collected in the collection boxes of the cyclone separator and bag separator, and then discharged into the silo. After that, it is sent to the activation furnace for activation through the feeder. The separated waste gas is discharged into the exhaust gas treatment system for purification.

[0024] Specifically, cyclone separators and bag separators, also known as cyclone dust collectors and bag dust collectors, are commonly used industrial dust removal equipment. The working principle of a cyclone dust collector is to use the dust-laden gas to rotate at high speed inside the cyclone, and separate the dust and gas through the action of centrifugal force. The dust falls into the collection box under the action of gravity, and the purified gas is discharged through the exhaust pipe. The efficiency and resistance of the cyclone dust collector are relatively low, and it is suitable for handling high-temperature and high-humidity flue gas and corrosive gas. The bag dust collector is an efficient and reliable dust treatment equipment. Its working principle is to filter the dust-laden gas through a bag made of filter material, so that the dust is retained on the surface of the bag, and the clean gas is discharged from the inside of the bag.

[0025] In actual use, the cyclone dust collector is usually set on the upstream side of the bag dust collector, and the two dust collectors are used in combination. With this setting, the cyclone dust collector can initially separate the dust and reduce the amount of dust entering the bag dust collector, thereby improving the dust removal efficiency of the bag dust collector and achieving better dust removal effects.

[0026] Therefore, this process uses a cyclone separator and a bag separator to jointly separate and collect powdered waste activated carbon, which is fully collected and has a relatively high collection efficiency.

[0027] S3. The activation furnace is preheated before feeding. After preheating to the appropriate temperature, the blowers at the furnace head and furnace tail of the activation furnace are turned on, and then the high-pressure steam generated by the boiler is sent into the activation furnace. In actual operation, the activation furnace should be preheated to about 300°C, for example, 290-310°C. The blower at the furnace head of the activation furnace is 3 kW, and the blower at the furnace tail is 5 kW. The activation furnace is equipped with 48 air inlet pipes for introducing high-pressure steam.

[0028] S4. After the powdered waste activated carbon is sent into the activation furnace, it is activated under the combined action of high temperature and steam. Steam can react with the waste activated carbon to gasify the waste activated carbon, so that the micropores on the surface of the waste activated carbon are cleaned and its adsorption performance is restored. In this process, when the waste activated carbon enters the furnace, it is necessary to flexibly adjust the feed ratio of the waste activated carbon, the speed of the high-pressure fan and the steam intake according to the actual activation situation, in order to achieve the best activation effect.

[0029] It is then sent to the first cooling cylinder for primary cooling, and then sent to the cyclone separator, and the unloader of the cyclone separator discharges the first heavier finished activated carbon; the airflow separated by the cyclone separator is sent to the second cooling cylinder for secondary cooling, and then sent to the bag separator, and the unloader of the bag separator discharges the second lighter finished activated carbon. The airflow separated by the bag separator is discharged into the exhaust gas treatment system for purification.

[0030] S5. The two lines of finished activated carbon are transported to the finished cyclone separator and the finished bag separator through negative pressure pipelines. The finished activated carbon is collected in the collecting boxes of the two separators and then sent to the mixing bin through the unloader for unloading and bagging. The finished activated carbon is packaged.

[0031] Compared with the traditional earth kiln technology to regenerate powdered waste activated carbon, this process uses high-temperature activation physical action to restore powdered waste activated carbon to the same quality as original activated carbon. It has stable technology, high yield rate, good finished product quality and high output.

[0032] Although a portion of the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations to these embodiments are within the scope of protection of the claims of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A process for regenerating powdered waste activated carbon, characterized in that: The following steps are involved: S1. After collecting the powdered waste activated carbon, remove the impurities therein, and then send it to the crushing and drying furnace through the feeder for crushing and drying; S2, the high-pressure blower sends the crushed and dried powdered waste activated carbon into the cyclone separator and bag separator for solid-gas separation. The separated powdered waste activated carbon is collected in the collection boxes of the cyclone separator and bag separator, and then discharged into the silo. After that, it is sent to the activation furnace through the feeder for activation. The separated waste gas is discharged into the tail gas treatment system for purification. S3, the activation furnace is preheated before starting to feed. After preheating to the appropriate temperature, the blowers at the furnace head and furnace tail of the activation furnace are turned on, and then the high-pressure steam generated by the boiler is sent into the activation furnace; S4. After the powdered waste activated carbon is sent into the activation furnace, it is activated under the combined action of high temperature and steam, and then sent to the first cooling cylinder for primary cooling, and then sent to the cyclone separator, and the first heavier finished activated carbon is discharged from the discharger of the cyclone separator; The airflow separated by the cyclone separator is sent to the second cooling cylinder for secondary cooling, and then sent to the bag separator. The discharger of the bag separator discharges the second lighter finished activated carbon. The airflow separated by the bag separator is discharged into the exhaust gas treatment system for purification. S5. The two lines of finished activated carbon are transported to the finished cyclone separator and the finished bag separator through negative pressure pipelines. The finished activated carbon is collected in the collecting boxes of the two separators and then sent to the mixing bin through the unloader for unloading and bagging. The finished activated carbon is packaged.

2. The powdered waste activated carbon regeneration production process according to claim 1, characterized in that: In step S1, the temperature of the crushing and drying furnace is 300°C, and the stirring blade in the crushing and drying furnace rotates to crush the powdered waste activated carbon, and the moisture content of the dried powdered waste activated carbon is between 15% and 18%.

3. The powdered waste activated carbon regeneration production process according to claim 1, characterized in that: In step S3, the activation furnace is preheated to 300°C, and a plurality of air inlet pipes for introducing high-pressure steam are provided in the activation furnace.

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