Device and method for quantitatively adding granular activated coke

Abstract

The present invention discloses a device and method for quantitatively adding granular activated coke, including a coking pool, wherein a stirrer is arranged in the coking pool; a ton bag bracket is arranged above the coking pool, a lifting device is installed above the ton bag bracket, the lifting device includes a lifting plate, brackets are arranged at both ends above the lifting plate, a bag lifting hook is rotatably installed above the bracket, and a bag lifting cylinder for driving the bag lifting hook to rotate is arranged at the end of the bag lifting hook; a bag clamping device is arranged below the ton bag bracket, a dust removal device is connected to the side of the bag clamping device, the inlet of the discharge valve is connected to the bag clamping device below, and the outlet of the discharge valve is connected to the coking pool. The present invention adds a ton bag bracket, and the driving crane does not need to wait until a bag of activated coke is added before hoisting a new one, thereby shortening the coking time; the rotation speed of the discharge valve is used to control the amount of lower coke, and the water inflow is controlled by an electromagnetic flowmeter and an electric regulating valve, so that the ratio of the two reaches the program setting value.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a device and method for quantitatively adding granular activated coke. Background Art

[0002] At present, there are two methods for adding granular activated coke / carbon: the truck crane method and the water ejector method.

[0003] Truck crane method: The vehicle transporting activated coke / carbon stops next to the truck crane, and the truck crane directly lifts the ton bag from the transport vehicle to the activated coke / carbon adsorption tank, and then opens the bag mouth and directly drops the material into the tank body. However, this method has many problems:

[0004] 1) The transport vehicle needs to wait by the pool. It takes a certain amount of time to hoist, unpack and lower the activated coke / carbon, so the waiting time is relatively long.

[0005] 2) For activated coke / carbon stored in the warehouse, the transport vehicle needs to use a forklift to transfer it to the warehouse side, and when adding, it needs to be transported by a forklift when it is hoisted by a car, and the transportation cost is relatively high;

[0006] 3) There is a dust problem when the activated coke / carbon falls into the pool, which cannot meet the increasingly stringent environmental protection requirements;

[0007] 4) Due to the limitation of the arm length of the truck crane, it is difficult to lift the activated coke / carbon into place when using the truck crane to lift large tanks;

[0008] 5) High labor costs and many operators. At least three people are needed to complete the work, one to hang the hook, one to lift, and one to unload;

[0009] 6) The crane shift fee is high, which translates to high operating costs per ton of water;

[0010] 7) The initial coke washing process cannot be achieved.

[0011] Water ejector dosing method: Use a forklift to fork the ton bag from the transport vehicle to the hopper, untie the bag mouth and drop it into the hopper, wait until one bag is dropped before forking the next bag, install a discharge valve on the hopper, control the discharge speed through the discharge valve, and then transport it to the storage tank through the bucket elevator. During the operation, turn on the dust removal device. When activated coke / carbon needs to be added, turn on the water pump and the tank discharge valve, and transport it to the activated coke / carbon adsorption tank through the water ejector. However, this method also has many problems:

[0012] 1) The whole set of equipment includes dust removal device, unloading hopper, bucket elevator, silo, weighing equipment, water ejector, jet pump, etc., which makes the investment cost of the whole activated coke / carbon dosing system relatively high; there are many equipments and maintenance work;

[0013] 2) Although a dust removal device is installed, dust generation is still inevitable when the activated coke / carbon is transported by bucket elevator;

[0014] 3) During transportation, dry activated coke / carbon is more likely to wear out equipment than wet activated coke / carbon;

[0015] 4) The working pressure required by the water ejector is high, and the pipes and water ejectors are prone to wear;

[0016] 5) When the ejector adds activated coke / carbon, the volume ratio of activated coke / carbon to water is 1:5~1:8, the water consumption is large, and this part of the water needs to be reprocessed;

[0017] 6) The forklift needs to wait until one bag of activated coke has fallen before it can move to the next bag. It takes a certain amount of time for the activated coke to fall, so the forklift has to wait for a long time. Summary of the invention

[0018] The purpose of the present invention is to provide a device and method for quantitatively adding granular activated coke, which can shorten the waiting time of vehicles, improve work efficiency, ensure the uniformity of the ratio of activated coke to water, and ensure a stable amount of coke added.

[0019] To this end, the first technical solution of the present invention is: a device for quantitatively adding granular activated coke, including a coking pool, in which a stirrer is provided; characterized in that: a ton bag bracket is provided above the coking pool, a lifting device is installed above the ton bag bracket, the lifting device includes a lifting base and a lifting plate, and both ends of the lifting plate are rotatably cooperated with the lifting base through screws; brackets are provided at both ends above the lifting plate, a bag lifting hook is rotatably installed above the bracket, and a bag lifting cylinder is provided at the end of the bag lifting hook to drive the bag lifting hook to rotate; a bag clamping device is provided below the ton bag bracket, the side of the bag clamping device is connected to the dust removal device through a pipeline, the bottom of the bag clamping device is connected to the inlet of the discharge valve, and the outlet of the discharge valve is connected to the coking pool; a water inlet pipe is provided above the coking pool, a flow meter is provided on the water inlet pipe, a coke adding pipe is provided below the coking pool, and a coke adding pneumatic valve is provided on the coke adding pipe.

[0020] Preferably, the middle of the bag lifting hook is rotatably mounted on the bracket via a pin shaft, the front end of the bag lifting hook is a curved hook structure, the end of the bag lifting hook is fixed to the end of the cylinder rod of the bag lifting cylinder, and the bag lifting cylinder can drive the end of the bag lifting hook to move downward and lift the front end of the bag lifting hook; a magnetic switch is provided on the bag lifting cylinder.

[0021] Preferably, the water inlet pipe is divided into two routes, one route is connected to the top of the coking pool via a flow meter and an electric regulating valve, and the other route is connected to the coking pipe via a flushing pneumatic valve; a coking pump is also provided on the coking pipe, and the flushing pneumatic valve is connected between the coking pneumatic valve and the coking pump.

[0022] The second technical solution of the present invention is: a method for quantitatively adding granular activated coke, comprising the following steps:

[0023] 1) Use the crane to lift the activated coke ton bag to the top of the coke pool, place the ton bag on the ton bag bracket, and continue to lift new ton bags by the crane;

[0024] 2) The bag lifting cylinder contracts, lifts the bag lifting hook, and hangs the lifting lug of the ton bag on the bag lifting hook;

[0025] 3) Pull out the unloading extension bag at the bottom of the ton bag, put it on the outside of the unloading pipe, tighten it with the bag clamping device, and then untie the extension bag; at the same time, turn on the dust removal device;

[0026] 4) Open the electric regulating valve and add water to the coking tank to the set middle liquid level;

[0027] 5) Open the discharge valve and use the speed of the discharge valve to control the amount of coke discharged; at the same time, start the mixer;

[0028] 6) When the ratio of activated coke to water in the pool reaches the set value, the discharge valve remains open and activated coke continues to be added; open the electric regulating valve again, add water at the set flow rate, and start the coke adding pump to start adding coke.

[0029] Preferably, when the mixing speed of active coke and water is greater than the flow rate of the coke adding pump, the liquid level in the coke adding tank rises, and when it reaches the set high liquid level, the discharge valve, the electric regulating valve, and the lifting device are immediately closed; when the mixing speed is less than the flow rate of the coke adding pump, when the liquid level in the coke adding tank gradually drops to the set low liquid level, the flushing pneumatic valve in front of the coke adding pump is opened, the coke adding pneumatic valve is closed, the active coke in the coke adding pipe is flushed clean, the coke adding pump is closed, and then steps 4), 5), and 6) are repeated.

[0030] Preferably, in step 5), the lifting device starts to work, the lifting plate starts to rise, and the tension on each bag lifting hook gradually increases. When the tension on the front end of a bag lifting hook is greater than the tension on the rear end of the bag lifting cylinder, the cylinder rod of the bag lifting cylinder is pulled upward, and after the magnetic switch on the bag lifting cylinder detects it, the lifting plate stops rising; when the active coke in the ton bag gradually decreases, the ton bag is gradually lifted by the bag lifting cylinder until the bag lifting cylinder is completely contracted, and the lifting plate rises again until the active coke in the ton bag is completely emptied; then repeat steps 1), 2), and 3).

[0031] Preferably, when the active coke in the ton bag is completely emptied and the ton bag is replaced, the discharge valve and the electric regulating valve are closed.

[0032] Preferably, the volume ratio of activated coke to water during the configuration process is 1:1.5-1:3, which is the set value of the ratio of activated coke to water.

[0033] The present invention adds a ton bag bracket, so the driving crane does not need to wait until one bag of activated coke is added before hoisting a new one. After the ton bag is unloaded onto the ton bag bracket, the next batch of activated coke / carbon can be hoisted during the coking process, which can greatly reduce the waiting time, especially for rooms with long driving distances, and shorten the coking time.

[0034] The present invention uses the rotation speed of the discharge valve to control the amount of coke under discharge, and controls the amount of water intake through an electromagnetic flowmeter and an electric regulating valve, so that the ratio of the two reaches the program setting value, which can ensure the uniformity of the ratio of active coke to water and ensure a stable amount of coke added. The volume ratio of active coke to water is 1:1.5 to 1:3. Due to the high concentration of coke, the uniform ratio can ensure the stability of the coke adding system and prevent the blockage of pipelines and equipment.

[0035] In the present invention, the dust removal device is kept in an open state throughout the coking process. The dust removal device can remove the air and powdered activated coke / carbon in the ton bag through negative pressure suction, and can also remove the powdered activated coke / carbon in the coking pool during the falling process of the activated coke / carbon, thereby solving the dust problem. After being filtered by the dust removal device, the collected powdered activated coke / carbon can be reused to create new revenue.

[0036] The present invention arranges a flushing pneumatic valve on the coking pipe to connect the water inlet pipe. After the coking is completed, the coking pipe can be flushed with water to ensure the smoothness of the coking pipe and prevent blockage.

[0037] The beneficial effects of the present invention are as follows:

[0038] 1) Activated coke / carbon can be added automatically and quantitatively, which is easy to operate and reduces the labor intensity of workers;

[0039] 2) It can reduce the time of adding activated coke / carbon and save working time;

[0040] 3) It can achieve dust-free and clean working environment;

[0041] 4) The collected powdered activated coke / carbon can be reused to create new economic value;

[0042] 5) Less water consumption in preparing activated coke / carbon;

[0043] 6) Ton bags can be reused many times. The market price of a ton bag is about 60 yuan, which saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

[0045] Figure 1 It is a structural schematic diagram of the present invention;

[0046] Figure 2 for Figure 1 A partial enlarged view of

[0047] Figure 3 It is a working schematic diagram of the present invention;

[0048] Figure 4 It is a working side view of the present invention.

[0049] Marked in the figure are: coke pool 1, ton bag bracket 2, bag clamping device 3, dust removal device 4, star-shaped unloading valve 5, electromagnetic flowmeter 6, electric regulating valve 7, flushing pneumatic valve 8, stirring rod 9, stirring motor 10, lifting base 11, lifting plate 12, screw 13, bracket 14, bag lifting hook 15, bag lifting cylinder 16, water inlet pipe 17, coke adding pipe 18, coke adding pneumatic valve 19, coke adding pump 20, crane 21, ton bag 22, and dust removal pipeline 23. DETAILED DESCRIPTION

[0050] See the attached drawings. The device for adding granular activated coke described in this embodiment includes a coke preparation tank 1, a mixer, a ton bag bracket 2, a lifting device, a bag clamping device 3, a dust removal device 4, a star-shaped discharge valve 5, an electromagnetic flow meter 6, a liquid level meter, an electric regulating valve 7, a flushing pneumatic valve 8 and supporting pipelines and an electrical control system.

[0051] The mixer includes a stirring rod 9 and a stirring motor 10 for driving the stirring rod to work. The stirring rod 9 is placed in the coking tank 1, and the stirring motor 10 is fixed above the coking tank 1: the ton bag bracket 2 is arranged above the feed port of the coking tank 1, and a lifting device is installed above the ton bag bracket 2. The lifting device includes a lifting base 11 and a lifting plate 12. Threaded holes are arranged at both ends of the lifting base. Both ends of the lifting plate 12 are rotatably matched with the lifting base 11 through a screw 13. A lifting motor is installed at the end of the screw 13. The lifting motor drives the screw. The screw It rotates and lifts in the threaded hole of the lifting base; brackets 14 are provided at both ends above the lifting plate 12, and a bag lifting hook 15 and a bag lifting cylinder 16 are installed on the brackets. The middle of the bag lifting hook 15 is rotatably installed on the bracket 14 through a pin shaft, and the front end of the bag lifting hook is a bent hook structure, and the end of the bag lifting hook is fixed to the end of the cylinder rod of the bag lifting cylinder 16. When the bag lifting cylinder 16 contracts the cylinder rod, it can drive the end of the bag lifting hook to move downward and lift the front end of the bag lifting hook 15; a magnetic switch is provided on the bag lifting cylinder to detect the contraction or extension state of the cylinder rod.

[0052] A bag clamping device 3 is provided below the ton bag bracket 2. A clamp is provided inside the bag clamping device, which can clamp the unloading extension bag of the ton bag 22 to prevent dust problems when the rope on the extension bag is untied. The side of the bag clamping device 3 is connected to the dust removal device 4 through the dust removal pipeline 23. The dust removal device is a cabinet-type dust removal device. Through negative pressure suction, the air and powdered activated coke / carbon in the ton bag can be sucked away. At the same time, the powdered activated coke / carbon in the coke pool during the falling process of the activated coke / carbon can be sucked away, which solves the dust problem. After filtering by the dust removal device, the collected powdered activated coke / carbon can be reused. The inlet of the star-shaped discharge valve 5 is connected below the bag clamping device, and the outlet of the star-shaped discharge valve 5 is connected to the feed port of the coke pool 1.

[0053] A water inlet pipe 17 is provided above the coking pool, and a coking pipe 18 is provided below the coking pool. The water inlet pipe is divided into two routes, one of which is connected to the top of the coking pool 1 via an electromagnetic flowmeter 6 and an electric regulating valve 7, and the other is connected to the coking pipe 18 via a flushing pneumatic valve 8; a coking pneumatic valve 19 and a coking pump 20 are provided on the coking pipe, and the flushing pneumatic valve 8 is connected between the coking pneumatic valve 19 and the coking pump 20. A liquid level meter is provided in the coking pool to detect the liquid level of the coking pool, thereby adjusting the water inlet.

[0054] In this embodiment, a crane 21 is used to lift activated coke / charcoal ton bags 22 from the activated coke / charcoal storage area to the coke pool 1, and the ton bags 22 are placed on the ton bag bracket 2. The crane continues to lift the next ton bag, and the bottom bag opening of the ton bag 22 on the bracket is manually untied to clamp the inner bag opening on the bag clamping device 3. At the same time, the dust removal device 4 is turned on, and the rotation speed of the star-shaped unloading valve 5 is used to control the amount of coke under the load. The electromagnetic flowmeter 6 and the electric regulating valve 7 are used to control the water intake to achieve the coke-water ratio set by the program. The ratio can be set arbitrarily as needed.

[0055] There are two ways to add activated coke / carbon: sequential batch coking and continuous coking. Sequential batch coking is suitable for occasions where the amount of activated coke / carbon added is small. Prepare one pool and add one pool. According to the coke-water ratio, water is automatically added to the set liquid level through liquid level control, and then activated coke / carbon is added to the coking pool. After stirring evenly, it is lifted to the activated coke / carbon adsorption pool by the coking pump. When the liquid level drops to the set value, the flushing pneumatic valve is opened and the coking pneumatic valve is closed. After the pipeline flushing is completed, the flushing pneumatic valve and the coking pump are closed.

[0056] Continuous coking is suitable for occasions with large amounts of activated coke / carbon. According to the ratio of activated coke / carbon to water, quantitative water replenishment and quantitative addition of activated coke / carbon are carried out. The water inflow is controlled by electromagnetic flowmeter and electric regulating valve, and the amount of activated coke / carbon falling is controlled by discharge valve. Activated coke / carbon configured in a fixed ratio can achieve quantitative addition, and at the same time, the stable operation of equipment and facilities is guaranteed during the transportation process, avoiding the occurrence of failures such as blockage of pipelines and equipment.

[0057] The specific steps include:

[0058] 1) Use the crane 21 to lift two ton bags 22 to the top of the coke pool 1 each time, place the ton bags 22 on the ton bag bracket 2, remove the ton bag lifting ears, and then use the crane to lift two bags of activated coke / carbon;

[0059] 2) The bag lifting cylinder 16 contracts and lifts the bag lifting hook 15. Each ton bag has 4 lifting ears. Two ton bag lifting ears are hung on the 8 bag lifting hooks respectively. A bag clamping device 3 and a star-shaped discharge valve 5 are arranged under each ton bag. The two bag clamping devices 3 are connected to the dust removal device 4 through the dust removal pipeline 23.

[0060] 3) Turn on the dust removal device 4; at the same time, pull out the unloading extension bag at the bottom of the ton bag 22, put it on the outside of the unloading pipe, tighten it with the bag clamping device 3, and then untie the rope on the extension bag;

[0061] 4) While the above operations are being performed, the electric regulating valve 7 is opened to the maximum opening, and water is added to the coking pool 1. When the water level reaches the set middle liquid level h1, the water addition is stopped;

[0062] 5) Turn on the stirring motor 10, open the two star-shaped discharge valves 5 (the operating frequency of the discharge valves must be pre-set), and start the lifting device. The lifting plate 12 begins to rise, and the tension on each bag hook 15 gradually increases. As long as the tension on the front end of one bag hook is greater than the tension on the rear end of the bag cylinder, the cylinder rod of the bag cylinder 16 will be pulled up, and the lifting plate 12 stops rising after the magnetic switch on the bag cylinder detects it; as the active coke / charcoal in the ton bag 22 gradually decreases, the ton bag 22 is gradually lifted by the bag cylinder 16 until the bag cylinder is completely retracted, that is, the magnetic switch detects it again, and the lifting plate rises again until the active coke / charcoal in the ton bag is completely emptied; then repeat steps 1), 2), and 3);

[0063] 6) When the ratio of active coke to water in the pool reaches the set value, the star-shaped discharge valve 5 remains open and active coke continues to be added; the electric regulating valve 7 is opened again, water is added at the set flow rate, and the coke adding pump is started to start adding coke;

[0064] 7) During normal operation, the mixing rate of activated coke and water should be greater than the flow rate of the coke adding pump. When the liquid level in the coke adding tank rises and reaches the set high liquid level, the star-shaped discharge valve 5, the electric regulating valve 7 and the lifting device are immediately closed;

[0065] If the proportioning speed is less than the flow rate of the coke adding pump, when the liquid level in the coke adding tank gradually drops to the set low liquid level, the coke adding pump cannot be stopped immediately. At this time, the flushing pneumatic valve 8 in front of the coke adding pump should be opened, and the coke adding pneumatic valve 19 should be closed. After the active coke in the coke adding pipe is flushed clean, the coke adding pump 20 should be closed, and then steps 4), 5), and 6 should be repeated);

[0066] 8) During the whole coking process, the dust removal device 4 and the mixer are kept turned on;

[0067] 9) Each time the ton bag 22 is changed, the star-shaped discharge valve 5 and the electric regulating valve 7 should be closed.

Claims

1. A device for quantitatively adding granular activated coke, comprising a coking pool, wherein a stirrer is provided in the coking pool; characterized in that: A ton bag bracket is provided above the coking pool, and a lifting device is installed above the ton bag bracket. The lifting device includes a lifting base and a lifting plate, and both ends of the lifting plate are rotatably matched with the lifting base through screws; brackets are provided at both ends above the lifting plate, and a bag hook is rotatably installed above each bracket, and a bag lifting cylinder is provided at the end of the bag lifting hook to drive the bag lifting hook to rotate, and the middle of the bag lifting hook is rotatably installed on the bracket through a pin shaft, and the end of the bag lifting hook is fixed to the end of the cylinder rod of the bag lifting cylinder, and the bag lifting cylinder can drive the end of the bag lifting hook to move downward and lift the front end of the bag lifting hook; a magnetic switch is provided on the bag lifting cylinder, and the magnetic switch detects the contraction state or extension state of the cylinder rod of the bag lifting cylinder; a bag clamping device is provided below the ton bag bracket, and the side of the bag clamping device is connected to the dust removal device through a pipeline, and the lower part of the bag clamping device is connected to the inlet of the discharge valve, and the outlet of the discharge valve is connected to the coking pool; a water inlet pipe is provided above the coking pool, and a flow meter is provided on the water inlet pipe, and a coke adding pipe is provided below the coking pool, and a coke adding pneumatic valve is provided on the coke adding pipe; Start the lifting device and the lifting plate begins to rise. When the pulling force on the front end of the bag lifting hook is greater than the pulling force of the bag lifting cylinder on the end of the bag lifting hook, the cylinder rod of the bag lifting cylinder is pulled upwards, and the lifting plate stops rising after the magnetic switch on the bag lifting cylinder detects the elongated state of the cylinder rod. When the active coke in the bag gradually decreases, the bag is gradually lifted by the bag lifting cylinder until the bag lifting cylinder is completely contracted. After the magnetic switch detects the contracted state of the cylinder rod again, the lifting plate rises again until the active coke in the bag is completely emptied.

2. The device for quantitatively adding granular activated coke according to claim 1, characterized in that: The front end of the bag hook is a curved hook structure.

3. The device for quantitatively adding granular activated coke according to claim 1, characterized in that: The water inlet pipe is divided into two routes, one route is connected to the top of the coking pool via a flow meter and an electric regulating valve, and the other route is connected to the coking pipe via a flushing pneumatic valve; a coking pump is also provided on the coking pipe, and the flushing pneumatic valve is connected between the coking pneumatic valve and the coking pump.

4. A method for quantitatively adding granular activated coke, characterized in that: Using the device according to any one of claims 1 to 3 comprises the following steps: 1) Use the crane to lift the activated coke ton bag to the top of the coke pool, place the ton bag on the ton bag bracket, and continue to lift new ton bags by the crane; 2) The bag lifting cylinder contracts, lifts the bag lifting hook, and hangs the lifting lug of the ton bag on the bag lifting hook; 3) Pull out the unloading extension bag at the bottom of the ton bag, tighten it with the bag clamping device, and then unfasten the extension bag; at the same time, turn on the dust removal device; 4) Open the electric regulating valve, open the electric regulating valve to the maximum opening, add water to the coking pool until the set middle liquid level, and then stop adding water; 5) Open the discharge valve and use the speed of the discharge valve to control the amount of coke under the discharge valve; at the same time, start the mixer; start the lifting device; 6) When the ratio of active coke to water in the coking pool reaches the set value, the discharge valve remains open and active coke continues to be added; the electric regulating valve is opened again, water is added at the set flow rate, and the coking pump is started to add coke; the amount of active coke falling is controlled by the speed of the discharge valve, and the water intake is controlled by the electromagnetic flowmeter and the electric regulating valve, so as to achieve the ratio of active coke to water set by the program.

5. A method for quantitatively adding granular activated coke as claimed in claim 4, characterized in that: When the mixing speed of activated coke and water is greater than the flow rate of the coke adding pump, the liquid level in the coke adding tank rises. When it reaches the set high liquid level, the unloading valve, electric regulating valve and lifting device are immediately closed; when the mixing speed of activated coke and water is less than the flow rate of the coke adding pump, the liquid level in the coke adding tank gradually drops to the set low liquid level, the flushing pneumatic valve in front of the coke adding pump is opened, the coke adding pneumatic valve is closed, the active coke in the coke adding pipe is flushed clean, the coke adding pump is closed, and then steps 4), 5), and 6) are repeated.

6. A method for quantitatively adding granular activated coke as claimed in claim 4, characterized in that: In step 5), the lifting device starts to work, the lifting plate starts to rise, and the tension on each bag hook gradually increases. When the tension on the front end of a bag hook is greater than the tension on the bag cylinder on the rear end, the cylinder rod of the bag cylinder is pulled upward, and the lifting plate stops rising after the magnetic switch on the bag cylinder detects the elongation of the cylinder rod; when the active coke in the ton bag gradually decreases, the ton bag is gradually lifted by the bag cylinder until the bag cylinder is completely retracted, and the lifting plate rises again until the active coke in the ton bag is completely emptied; then repeat steps 1), 2), and 3).

7. A method for quantitatively adding granular activated coke according to claim 6, characterized in that: When the active coke in the ton bag is completely emptied and the ton bag is replaced, close the discharge valve and the electric regulating valve.

8. A method for quantitatively adding granular activated coke as claimed in claim 4, characterized in that: The setting value of the ratio of activated coke to water in step 6) is: the volume ratio of activated coke to water is 1:1.5~1:3.

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