CN116002685A - A production and preparation system for powdered activated carbon - Google Patents

Abstract

The invention discloses a production and preparation system of powdery activated carbon, and relates to the field of coal gasification ash combustion; activating working section equipment enables the production raw materials to undergo an activating reaction under the action of an activating agent to obtain an activated product with a first set temperature; the activated product with the first set temperature heats air in the waste heat recovery device to obtain heated air and an activated product with the second set temperature, and the waste heat recovery device exchanges heat with the activated product with the second set temperature and cools the activated product with the second set temperature to obtain a recovered product with the third set temperature; the heated air is used as an activating agent and is transmitted to activating section equipment; the dry type filtering and collecting equipment collects activated carbon powder carbon in the recovered product with the third set temperature, and separates the activated carbon powder carbon in the recovered product with the third set temperature from the gas mixture; the invention can realize the conversion of powdery active carbon and reduce the cost.

Description

A production and preparation system for powdered activated carbon

technical field

The invention relates to the field of coal gasification ash combustion, in particular to a production and preparation system for powdered activated carbon.

Background technique

In order to actively build an ecologically civilized society, the requirements for environmental protection are getting higher and higher. Activated carbon has been widely used as a wide range of adsorption materials in various fields. At present, the main production process of activated carbon can be divided into three types: raw coal crushed activated carbon, shaped activated carbon (column, briquette) and powdered activated carbon. The raw coal crushing activated carbon production process is suitable for raw coal with high physical strength and reactivity, and has high requirements for raw materials; the shaped activated carbon production process is mostly granular carbon, and the steam consumption is large. Powdered activated carbon is mostly made of high-quality wood chips and refined through special production processes.

Comparing the application of granular activated carbon and powdered activated carbon, granular activated carbon can be used for liquid phase and gas phase adsorption, and is generally used to treat gases that need to pass through activated carbon continuously. The characteristics of granular activated carbon are: suitable for continuous process and automatic control, due to the high price, it should be regenerated when used in large quantities, and it is easy to regenerate; powdered activated carbon is used for liquid phase adsorption, the price is low, and it is mixed after adding liquid , Filtration or sedimentation to obtain the desired liquid. At the same time, the characteristics of powdered activated carbon are: suitable for batch processes, easy to control the amount added, and ready-made filtration equipment can be used. Compared with granular carbon, it has different market demands. However, most of them are granular carbons in the existing market and lack powdery activated carbons.

Gasification ash has a high carbon content and can be used as a raw material for powdered activated carbon. It is a waste of carbon resources to be directly treated as solid waste. Therefore, the gasification ash produced by coal gasification is processed into powdered activated carbon products and converted locally. , can achieve the purpose of resource integration and utilization, meet the different needs of the market for activated carbon, and at the same time increase the economic benefits of coal gasification enterprises, and realize the transformation of waste into wealth. Then, how to realize the conversion of gasification ash into powdered activated carbon is very important.

Contents of the invention

The purpose of the present invention is to provide a production and preparation system for powdered activated carbon, which can realize the transformation of powdered activated carbon and reduce the cost.

To achieve the above object, the present invention provides the following scheme:

A powdery activated carbon production and preparation system, the system includes: activation section equipment, waste heat recovery equipment and dry filtration collection equipment;

Both the activation section equipment and the dry filter collection equipment are connected to the waste heat recovery equipment;

The activation section equipment is used for:

The production raw materials undergo an activation reaction under the action of an activator to obtain an activated product at a first set temperature; the production raw materials include: raw coal for starting the furnace and gasification ash; the activated product is a powder-gas mixture; the powder-gas mixture It is a mixture of activated carbon powder and coal gas; the raw coal for starting the furnace is coal whose particle size is not larger than the set particle size;

The waste heat recovery equipment is used for:

Receive the activated product at the first set temperature, and use the heat of the activated product at the first set temperature to heat the air to obtain heated air and the activated product at the second set temperature; the heated air is used as an activator , transmitted to the activation section equipment; the second set temperature is lower than the first set temperature;

The activated product at the second set temperature is subjected to heat exchange and cooling treatment to obtain the recovered product at the third set temperature; the recovered product includes: activated carbon powder and gas mixture; the third set temperature is lower than the second set temperature Set temperature; The gas mixture is a mixture of gas and steam;

The dry filter collection equipment is used for:

The activated carbon powder in the recovered product at the third set temperature is collected, and the activated carbon powder and the gas mixture in the recovered product at the third set temperature are separated.

Optionally, the equipment in the activation section includes: an activation furnace, a cyclone separator and a feeder;

The cyclone separator is respectively connected with the activation furnace and the waste heat recovery equipment; the return device is respectively connected with the cyclone separator and the activation furnace;

The activation furnace is used for:

Activating the production raw materials under the action of an activator to obtain an activation mixture; the activation mixture is a mixture of an activation product at a first set temperature and semi-coke granular coal;

Said cyclone separator is used for:

Separating the activation mixture to obtain the semi-coke granular coal and an activation product at a first set temperature;

The feeder is used for:

The semi-coke granular coal is transported to the activation furnace.

Optionally, the waste heat recovery equipment includes: an air preheater and a waste heat boiler;

The air preheater is respectively connected with the activation section equipment and the waste heat boiler; the waste heat boiler is also connected with the dry filter collection equipment;

The air preheater is used for:

Preheat the air to obtain preheated air;

receiving the activated product at the first set temperature, and using the heat of the activated product at the first set temperature to heat the preheated air to obtain heated air and the activated product at the second set temperature;

Transport the heated air to the activation section equipment to supplement the activator and provide heat for the activation reaction;

The waste heat boiler is used for:

The activated product at the second set temperature is cooled to obtain the activated product at the third set temperature, and saturated or superheated steam is generated at the same time.

Optionally, the dry filter collection equipment includes: a cyclone collector, a cyclone collector bin pump, a cloth bag collector and a cloth bag collector bin pump;

The cyclone collector is respectively connected to the waste heat recovery equipment and the cyclone collector bin pump; the bag collector is connected to the cyclone collector and the bag collector bin pump respectively;

The cyclone collector is used to collect part of the activated carbon powder carbon in the recovery product of the third set temperature, and is transported to the cyclone collector bin pump;

The cyclone collector bin pump is used to transfer the activated carbon powder carbon collected by the cyclone collector to the activated carbon powder carbon bin;

The bag collector is used to collect another part of activated carbon powder carbon in the recovery product of the third set temperature, and transfer to the bag collector warehouse pump;

The bag collector bin pump is used to transfer the activated carbon powder collected by the bag collector to the activated carbon powder carbon bin.

Optionally, the system also includes: a feeding device;

The conveying device is connected with the equipment in the activation section; the conveying device is used for conveying the production raw materials.

Optionally, the system also includes: a gas separation device;

The gas separation device is connected to the dry filter collection equipment;

The gas separation device is used for cooling and separating the gas mixture in the recovered product at the third set temperature to obtain dry gas.

Optionally, the gas separation device includes: a gas cooling tank and a gas separation tank;

The gas cooling tank is connected to the dry filter collection equipment; the gas separation tank is connected to the gas cooling tank;

The gas cooling tank is used for:

The coal-gas mixture in the recovered product at the third set temperature is cooled to obtain a coal-water mixture at a fourth temperature; the coal-water mixture is a mixture of gas and condensed water; the fourth temperature is lower than the third set temperature;

The gas separation tank is used for:

The coal-water mixture at the fourth temperature is separated to obtain coal gas at the fourth temperature and condensed water at the fourth temperature.

Optionally, the starting coal includes: lignite, long-flame coal, non-sticky bituminous coal, weakly sticky bituminous coal and anthracite.

According to the specific embodiments provided by the invention, the invention discloses the following technical effects:

The invention provides a production and preparation system for powdered activated carbon. The production raw materials are activated under the action of an activator through the activation section equipment to obtain the activated product at the first set temperature; the waste heat recovery equipment receives the first set temperature The activation product is lowered in temperature, and then the activated carbon powder carbon in the recovered product at the third set temperature is collected through a dry filter collection device, and is separated from the mixture with the gas; finally, the activated carbon powder carbon is obtained; the present invention passes through the activation section Equipment, waste heat recovery equipment and dry filter collection equipment realize the transformation of raw coal and gasification ash into powdered activated carbon, and realize the recycling and reuse of waste gasification ash in process production, reducing the waste of resources and reducing the Production cost; thus, the present invention can realize the transformation of powdered activated carbon and reduce the cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Fig. 1 is a schematic structural diagram of a production and preparation system for activated carbon provided in an embodiment of the present invention.

Symbol Description:

Activation section equipment-1, waste heat recovery equipment-2, dry filter collection equipment-3, activation furnace-4, cyclone separator-5, feeder-6, air preheater-7, waste heat boiler-8, Cyclone collector-9, cyclone collector bin pump-10, cloth bag collector-11, cloth bag collector bin pump-12, material conveying device-13, gas separation device-14, gas cooling tank-15, gas separation tank- 16. Tail waste heat recovery equipment-17, slag cooling machine-18, ignition burner-19, fly ash bin-20, first fly ash buffer bin-21, second fly ash buffer bin-22, coal feeding bin- 23. First gas injector-24, second gas injector-25.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The purpose of the present invention is to provide a production and preparation system for powdered activated carbon, which can realize the transformation of powdered activated carbon and reduce the cost.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIG. 1 , a powdered activated carbon production and preparation system provided by an embodiment of the present invention includes: activation section equipment 1 , waste heat recovery equipment 2 and dry filter collection equipment 3 .

Both the activation section equipment 1 and the dry filter collection equipment 3 are connected to the waste heat recovery equipment 2 . Activation section equipment 1 is used to activate the production raw materials under the action of an activator to obtain an activated product at the first set temperature; the production raw materials include: raw coal for starting the furnace and gasification ash; the activated product at the first set temperature is Powder-gas mixture; powder-gas mixture includes: activated carbon powder and coal gas; the raw coal for starting furnace is coal whose particle size is not larger than the set particle size. Specifically, the particle size of the furnace-starting raw coal is ≤10 mm.

The top outlet of the activation furnace 4 in the activation section equipment 1 is connected to the high-efficiency cyclone separator 5, and the lower end of the cyclone separator 5 is connected to the feeder 6, and the lower outlet of the feeder 6 is connected to the lower end of the furnace of the activation furnace 4 to form a high-power external circulation loop. Specifically, the high-efficiency cyclone separator 5 efficiently separates the semi-coke from the gas at the outlet of the activation furnace 4 to achieve a high-efficiency and low-resistance separation effect, ensuring that the furnace of the activation furnace 4 can operate under slightly positive pressure conditions; the return device 6 A high-throughput U-shaped self-balancing feeding device is adopted to form a high-rate external circulation loop with the activation furnace 4 and the cyclone separator 5.

Specifically, the activation section equipment 1 includes: an activation furnace 4, a cyclone separator 5 and a feeder 6; the cyclone separator 5 is connected to the activation furnace 4 and the waste heat recovery device 2 respectively; the feeder 6 is connected to the cyclone separator 5 Connect with activation furnace 4.

The activation furnace 4 is used to activate the production raw materials under the action of an activator to obtain an initial activation product; the initial activation product is a mixture of activated carbon powder, gas and semi-coke granular coal.

The cyclone separator 5 is used to separate the activated carbon powder, coal gas and semi-coke granular coal in the initial activation product to obtain the semi-coke granular coal and the activated product at the first set temperature. The feeder 6 is used to transport the semi-coke granular coal to the activation furnace 4 .

The waste heat recovery device 2 is used to receive the activated product at the first set temperature; the heat of the activated product at the first set temperature heats the air in the waste heat recovery device 2 to obtain the heated air and the activated product at the second set temperature ; The heated air is used as an activator and a heat source, and is transmitted to the activation section equipment 1; the second set temperature is lower than the first set temperature.

The waste heat recovery equipment 2 is also used to cool down the activated product at the second set temperature to obtain the recovered product at the third set temperature; the recovered product includes: activated carbon powder and gas mixture; the third set temperature is lower than the second set temperature set temperature. A gas mixture is a mixture of gas and steam.

The waste heat recovery equipment 2 may consist of an air preheater 7 and a steam generator or waste heat boiler 8 and the like. The air and part of the steam generated by the heating of the waste heat recovery equipment 2 are returned to the furnace of the activation furnace 4, the air temperature is 600-800°C, the steam temperature is 120-540°C, and the pressure is 1.2-5.4MPaG.

Specifically, the waste heat recovery equipment 2 includes: an air preheater 7 and a waste heat boiler 8; the air preheater 7 is connected to the activation section equipment 1 and the waste heat boiler 8; the waste heat boiler 8 is also connected to the dry filter collection equipment 3.

Air preheater 7 is used for preheating air, obtains the air after preheating; Air preheater 7 is also used for receiving the activated product of first set temperature; The heat of the activated product of first set temperature is to entering The cold air of the air preheater 7 is heated to obtain the heated air and the activated product at the second preset temperature. The heated air leaving the air preheater 7 is conveyed to the activation section equipment 1 .

The waste heat boiler 8 is used to lower the temperature of the activated product at the second set temperature to obtain the recovered product at the third set temperature; the recovered product includes: activated carbon powder and gas mixture; that is, the waste heat boiler 8 is used for the second set temperature The activated product of the first temperature is subjected to cooling treatment to obtain the activated product of the third set temperature, and at the same time, saturated or superheated steam is generated.

The dry filter collection device 3 is used to collect the activated carbon powder in the recovered product at the third set temperature, and separate the activated carbon powder and the gas mixture in the recovered product at the third set temperature.

The activated carbon powder collected by the dry filter collection device is conveyed by pneumatic means; the outlet of the cyclone collector 9 and the lower part of the bag collector 11 are equipped with a warehouse pump for dense phase transportation, and the gas is sent to the intermediate storage warehouse with nitrogen.

Specifically, the dry filter collection equipment 3 includes: a cyclone collector 9, a cyclone collector bin pump 10, a bag collector 11 and a bag collector bin pump 12; the cyclone collector 9 is connected with the waste heat recovery device 2 and the cyclone collector bin The pump 10 is connected; the bag collector 11 is connected with the cyclone collector 9 and the bag collector bin pump 12 respectively.

The cyclone collector 9 is used to collect the active carbon powder carbon in the recovered product of the third preset temperature; the cyclone collector storehouse pump 10 is used to transfer the part activated carbon powder carbon collected by the cyclone collector 9 to the activated carbon powder carbon storehouse; the cloth bag collector 11 is used Collect another part of activated carbon powder charcoal in the recovery product of the third set temperature; the bag collector bin pump 12 is used to transfer another part of activated carbon powder carbon collected by the bag collector 11 to the activated carbon powder carbon bin.

As an optional embodiment, the system further includes: a conveying device 13; the conveying device 13 is connected to the activation section equipment 1; the conveying device 13 is used for conveying production raw materials.

In one embodiment, the system also includes: gas separation device 14; gas separation device 14 is connected with dry filter collection equipment 3; Perform cooling treatment and separation treatment to obtain dry gas.

Specifically, the gas separation device 14 includes: a gas cooling tank 15 and a gas separation tank 16; the gas cooling tank is connected to the dry filter collection device 3;

The gas cooling tank is used to lower the temperature of the gas-gas mixture in the recovered product at the third set temperature to obtain the coal-water mixture at the fourth temperature; the coal-water mixture includes: gas and condensed water; the fourth temperature is lower than the third setting temperature.

The gas separation tank 16 is used to separate the coal-water mixture at the fourth temperature to obtain the gas at the fourth temperature and the condensed water at the fourth temperature.

In one embodiment, the starting raw coal includes lignite, long-flame coal, non-sticky bituminous coal, weakly sticky bituminous coal and anthracite.

The system also includes a tail waste heat recovery device 17; the tail waste heat recovery device 17 returns the tail gas to the bottom burner of the activation furnace 4, and the flue gas generated by ignition enters the furnace of the activation furnace 4. There are evenly arranged wind caps at the bottom of the furnace chamber of the activation furnace 4 . The temperature of activation furnace 4 is 900～1100 ℃, the temperature of activation furnace 4 top is 800～1000 ℃, and the temperature of high temperature gas at the outlet of activation furnace 4 is 900～1100 ℃.

The fly ash processing capacity of activation furnace 4 of this system is 0.5-50t/h, the output of activated carbon powder is 100-15000kg/h, and the output of by-product gas (dry gas) is 1000-80000Nm ³ /h (calorific value 1000-2500kcal/Nm ³ ), the saturated steam output is 1000～50000kg/h.

The powdered activated carbon production and preparation system provided by the invention mainly includes the following parts:

1. Feeding of gasification ash and starting coal; 2. Activation reaction in the activation furnace; 3. High-efficiency separation of gas and return of materials; 4. Cooling and discharge of waste residue; 5. Waste heat recovery treatment of gas; 6. Activated carbon powder Dry filtration collection; 7. By-product gas cooling; 8. Tail gas waste heat recovery.

In practical applications, the specific operation process of the system can be as follows:

The raw coal (particle size ≤ 10 mm) and gasification ash are sent to the activation section equipment 1 through the feeding device 13 .

The activation reaction of the equipment 1 in the activation section produces high-temperature gas at 900-1100°C, which enters the waste heat recovery equipment 2 after being efficiently separated by the cyclone separator 5 and returned by the feeder 6. Part of the tail gas enters the tail waste heat recovery equipment 17 .

Waste heat recovery equipment 2 recovers the heat of high-temperature gas through heat exchange to generate high-temperature air and steam, and the gas is cooled to about 180°C and sent to dry filter collection equipment 3 .

The dry filter collection equipment 3 captures the activated carbon powder in the gas, and pneumatically transports it to the intermediate storage warehouse. After purification, the gas is cooled to about 60°C as a by-product.

The tail waste heat recovery equipment 17 sends the tail gas to the burner at the bottom of the furnace, ignites and sends it back to the activation section equipment 1.

The raw material of equipment 1 in the activation section is mixed with high-temperature circulating semi-coke, and the coarser particles sink to the bottom of the furnace, where they burn and gasify with the gasification agent composed of oxygen-enriched air and steam; the finer semi-coke particles rise to the furnace The upper part absorbs heat from the bottom and reacts with carbon dioxide, steam, etc. to generate gas entrained with activated carbon powder; after the mixture of gas and semi-coke passes through the cyclone separator 5 for gas-solid separation, the semi-coke continues to return to the furnace through the return device 6 Participating in the reaction, the high-temperature gas is sent to the subsequent waste heat recovery system. The slag obtained after the reaction is cooled by the slag cooler 18 from the bottom of the gasifier and discharged through the slag conveying screw.

The starting raw coal of equipment 1 in the activation section has wide adaptability and can be prepared directly from pulverized coal: lignite, long-flame coal, non-sticky bituminous coal, weakly sticky bituminous coal, anthracite, etc. can be used.

The activator of equipment 1 in the activation section can be flexibly selected: one, two or more combinations of air, air+water vapor, oxygen-enriched air/pure oxygen+steam, _CO2 . A wind cap is arranged in the circulating fluidized bed activation furnace 4 to make the activation temperature uniform, which can reach about 1000°C.

The air preheater 7 in the waste heat recovery equipment 2 receives the high-temperature gas from the cyclone separator 5, and heats it to generate 650°C high-temperature air. The gas cooled to a certain degree leaves the air preheater 7 and enters the steam generator or waste heat boiler 8, etc., and cools down to below 200°C to produce 3.8MPaG (380°C) superheated steam and 0.3MPaG low-pressure saturated steam. Part of the low-pressure steam is used by the activation furnace 4 as an activator and a deaerator for self-use, and the by-product superheated steam is sent outside the boundary area.

The dry filter collection device 3 connects the cyclone collector 9 and the bag collector 11 in sequence to capture the activated carbon powder in the gas leaving the waste heat recovery device 2. The cyclone collector 9 has an activated carbon powder carbon collection efficiency of 20% to 30%. The collection efficiency of the device 11 can reach more than 99%.

Activated carbon powder carbon (100-15000kg/h) captured by the dry filter collection equipment 3 is transported by pneumatic, dense phase, and the gas is nitrogen, and sent to the intermediate storage warehouse through the cyclone collector chamber pump 10 and the bag collector chamber pump 12 .

The coal gas that leaves after dry filter collection equipment 3 finishes, for further cooling, enters gas cooler, and spraying water sprays and cools down. Coal gas and spray water exchange heat countercurrently in the tower, and the gas can be sent out of the boundary area as a by-product (calorific value 1450-2500kcal/Nm ³ ) after cooling down to 45°C.

The conveying device 13 includes a fly ash silo 20 , a first fly ash buffer bin 21 , a second fly ash buffer bin 22 , a first gas injector 24 , a second gas injector 25 and a coal feeding bin 23 . The outlet at the lower end of the fly ash bin 20 is connected to the inlet of the buffer bin, the outlet of the buffer bin is connected to the activation furnace 4 through the gas injector, and the outlet of the coal bunker is connected to the activation furnace 4 through the feeder.

The top outlet of the activation furnace 4 of the equipment 1 in the activation section is connected to the high-efficiency cyclone separator 5, the lower end of the cyclone separator 5 is connected to the feeder 6, and the lower outlet of the feeder 6 is connected to the lower end of the furnace of the activation furnace 4 to form a high-rate external circulation circuit.

The waste heat recovery equipment 2 is composed of an air preheater 7 and a steam generator or a waste heat boiler 8. The inlet of the air preheater 7 is connected to the outlet of the cyclone separator 5.

The dry filter collection equipment 3 is composed of a cyclone collector 9, a bag collector 11 and a gas cooler connected in sequence. The cyclone collector 9 is connected behind the steam generator or the waste heat boiler 8 in the waste heat recovery section. The tail waste heat recovery section is an ignition burner 19 installed at the bottom of the furnace of the activation furnace 4 .

The high-efficiency cyclone separator 5 in the equipment 1 of the activation section efficiently separates the semi-coke in the gas at the outlet of the activation furnace 4 from the gas to achieve a high-efficiency and low-resistance separation effect and ensure that the furnace of the activation furnace 4 can operate under slightly positive pressure conditions; Among them, the feeder 6 adopts a high-throughput U-shaped self-balanced feeder device, which forms a high-rate external circulation loop with the activation furnace 4 and the cyclone separator 5, effectively reducing the carbon content of the waste residue.

The air and part of the steam generated by the heating of the waste heat recovery equipment 2 are returned to the furnace of the activation furnace 4 to provide heat and act as an activator, and part of the steam is sent to the outside of the boundary area. ; Tail waste heat recovery equipment 17 returns the tail gas to the bottom burner of the activation furnace 4, and the flue gas generated by ignition enters the furnace of the activation furnace 4 to provide heat and CO ₂ and H ₂ O at the same time.

The bottom of the furnace of the activation furnace 4 has uniformly arranged hoods, which can evenly distribute the flue gas, air, and steam entering the furnace from the bottom into the furnace of the activation furnace 4 to ensure the temperature of the activation furnace 4 and the reaction efficiency of the activation reaction. The temperature of activation furnace 4 is 900～1100 ℃, the temperature of activation furnace 4 top is 800～1000 ℃, and the temperature of high temperature gas at the outlet of activation furnace 4 is 900～1100 ℃.

The cyclone collector 9 of the dry filter collection equipment 3 is composed of a body, an activated carbon discharge system, a steel frame, and insulation materials. The equipment is arranged behind the waste heat boiler 8 and before the bag collector 11. The design principle of high speed at the entrance and low speed at the exit. The separation of the cyclone collector 9 reduces the concentration of charcoal in the gas at the inlet of the bag collector 11 and prolongs the service life of the bag collector 11 . The bag collector 11 includes collector cylinder, filter bag, bag cage, powder cleaning system, conical hopper, nitrogen cannon cleaning device, electric control, etc.

Embodiments of the present invention have the following advantages:

1. In the present invention, the amount of fly ash treated by the activation furnace device is 0.5-50t/h, the output of activated carbon powder is 100-15000kg/h, the by-product gas is 1000-80000Nm ³ /h (calorific value 1000-2500kcal/Nm ³ ), and the output of saturated steam 1000～50000kg/h. Compared with other activated carbon production processes, the production process of the present invention has obvious improvement in output, and the activated carbon product is powdered carbon, which satisfies different market demands.

2. The present invention is equipped with waste heat recovery equipment to fully absorb the heat in the high-temperature gas and avoid waste of heat. At the same time, air is heated and steam is generated, which enters the activation furnace as an activator, which can effectively reduce the consumption of steam in the activated carbon production process.

3. The present invention is equipped with a cyclone collector and a bag collector to effectively collect the activated carbon powder entrained in the gas, and at the same time purify the gas to generate by-products, reduce waste of resources, and increase economic benefits.

4. The present invention is equipped with waste heat recovery equipment at the tail to return the tail gas to the burner at the bottom of the activation furnace, and after being ignited, the generated flue gas is sent to the hearth of the activation furnace. While providing heat, CO ₂ and H ₂ O required for the activation reaction are also provided. The steam consumption in the activated carbon production process is further reduced.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

In this paper, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to the present invention Thoughts, there will be changes in specific implementation methods and application ranges. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (8)

1. A powdered activated carbon production and production system, the system comprising: the device comprises an activation working section device, a waste heat recovery device and a dry type filtering and collecting device;

the activation working section equipment and the dry type filtering and collecting equipment are connected with the waste heat recovery equipment;

the activation section device is used for:

activating the production raw materials under the action of an activating agent to obtain an activated product with a first set temperature; the production raw materials comprise: starting raw coal and gasified ash; the activation product is a powder-gas mixture; the powder-gas mixture is a mixture of activated carbon powder carbon and gas; the raw coal for starting the furnace is coal with the grain diameter not larger than a set grain diameter;

the waste heat recovery device is used for:

receiving the activation product with the first set temperature, and heating the air by utilizing the heat of the activation product with the first set temperature to obtain heated air and an activation product with the second set temperature; the heated air is used as an activating agent and is transmitted to the activating section equipment; the second set temperature is less than the first set temperature;

performing heat exchange and cooling treatment on the activated product at the second set temperature to obtain a recovered product at a third set temperature; the recovered product comprises: activated carbon powder carbon and coal gas mixture; the third set temperature is less than the second set temperature; the coal gas mixture is a mixture of coal gas and steam;

the dry filtration collection device is used for:

and collecting activated carbon powder carbon in the recovered product at the third set temperature, and separating the activated carbon powder carbon and the coal gas mixture in the recovered product at the third set temperature.

2. The powdered activated carbon production and preparation system of claim 1, wherein the activation section equipment comprises: an activation furnace, a cyclone separator and a material returning device;

the cyclone separator is respectively connected with the activation furnace and the waste heat recovery equipment; the material returning device is respectively connected with the cyclone separator and the activation furnace;

the activation furnace is used for:

activating the production raw materials under the action of an activating agent to obtain an activated mixture; the activated mixture is a mixture of activated products at a first set temperature and semicoke granular coal;

the cyclone separator is used for:

separating the activated mixture to obtain the semicoke granular coal and an activated product with a first set temperature;

the material returning device is used for:

and conveying the semicoke granular coal to the activation furnace.

3. The powdered activated carbon production and preparation system of claim 1, wherein the waste heat recovery device comprises: an air preheater and a waste heat boiler;

the air preheater is respectively connected with the activation working section equipment and the waste heat boiler; the waste heat boiler is also connected with the dry type filtering and collecting equipment;

the air preheater is used for:

preheating air to obtain preheated air;

receiving the activation product with the first set temperature, and heating the preheated air by utilizing the heat of the activation product with the first set temperature to obtain heated air and an activation product with the second set temperature;

the heated air is transmitted to the activation working section equipment to supplement the activating agent and simultaneously provide heat for the activation reaction;

the waste heat boiler is used for:

and cooling the activated product at the second set temperature to obtain the activated product at the third set temperature, and generating saturated or superheated steam.

4. The powdered activated carbon production and preparation system of claim 1, wherein the dry filtration collection device comprises: cyclone collector, cyclone collector bin pump, cloth bag collector and cloth bag collector bin pump;

the cyclone collector is respectively connected with the waste heat recovery equipment and the cyclone collector bin pump; the cloth bag collector is respectively connected with the cyclone collector and the cloth bag collector bin pump;

the cyclone collector is used for collecting part of activated carbon powder carbon in the recovered product with the third set temperature and transmitting the part of activated carbon powder carbon to the cyclone collector bin pump;

the cyclone collector bin pump is used for conveying the activated carbon powder and carbon collected by the cyclone collector to the activated carbon powder and carbon bin;

the cloth bag collector is used for collecting the other part of activated carbon powder carbon in the recovered product with the third set temperature and transmitting the activated carbon powder carbon to the cloth bag collector bin pump;

the cloth bag collector bin pump is used for conveying the activated carbon powder carbon collected by the cloth bag collector to the activated carbon powder carbon bin.

5. The powdered activated carbon production and preparation system of claim 1, further comprising: a material conveying device;

the material conveying device is connected with the activation working section equipment; the conveying device is used for conveying the production raw materials.

6. The powdered activated carbon production and preparation system of claim 1, further comprising: a gas separation device;

the gas separation device is connected with the dry type filtering and collecting equipment;

the gas separation device is used for carrying out cooling treatment and separation treatment on the gas mixture in the recovered product with the third set temperature to obtain dry gas.

7. The powdered activated carbon production and preparation system of claim 6, wherein the gas separation device comprises: a gas cooling tank and a gas separation tank;

the gas cooling tank is connected with the dry type filtering and collecting equipment; the gas separation tank is connected with the gas cooling tank;

the gas cooling tank is used for:

cooling the coal-gas mixture in the recovered product with the third set temperature to obtain a coal-water mixture with a fourth temperature; the coal-water mixture is a mixture of coal gas and condensed water; the fourth temperature is less than the third set temperature;

the gas separation tank is used for:

and separating the coal-water mixture at the fourth temperature to obtain coal gas at the fourth temperature and condensed water at the fourth temperature.

8. The powdered activated carbon production and production system of claim 1, wherein the raw coal for start-up comprises: lignite, long flame coal, non-sticky bituminous coal, weak sticky bituminous coal and anthracite coal.

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