Tar residue collection, loading, transportation, unloading, mixing and utilization system and process

Abstract

The present invention relates to the technical field of tar slag treatment in the coking industry, and in particular to a system and process for collecting, loading, transporting, unloading, mixing and utilizing tar slag. The system comprises a screw conveyor, a temporary slag storage tank, a loading sealing device, a mobile tar slag storage hopper, an AGV trolley, a unloading device, a receiving hopper, a mixer and a belt conveyor unit; the feeding port of the screw conveyor is sealedly connected to the slag discharge port of the scraping trough through a pipeline, and its unloading port is sealedly connected to the pipeline of the temporary slag storage tank; the main pipeline at the outlet of the temporary slag storage tank is sealedly connected to the mobile tar slag storage hopper through a loading sealing device, and the mobile tar slag storage hopper is placed on the AGV trolley; the unloading device flips the mobile tar slag storage hopper to pour the tar slag into the receiving hopper, the receiving hopper is sealedly connected to the mixer, and the mixer is sealedly connected to the belt conveyor unit. The system realizes the full sealing, harmlessness, mechanization and automation of the tar slag collection, loading, transportation, unloading and mixing process, and realizes the effective utilization of tar slag.

Description

Technical Field

[0001] The present invention relates to the technical field of tar residue treatment in the coking industry, and in particular to a tar residue collection, loading, transportation, unloading, mixing and utilization system and process. Background Art

[0002] At present, a large amount of tar slag is produced in the production of coking enterprises. As a kind of waste, tar slag is discharged through the slag outlet of the tar ammonia clarification machine scraper trough, and then collected and processed. This is a common method adopted by most coking enterprises. Generally, a cement tank is placed under the slag outlet of the tar ammonia clarification tank, and the tar slag is manually taken out into the tar slag box, and then transported to the tar slag box tar slag placement point to dump the tar slag.

[0003] Due to the high viscosity of tar residue and long discharge time, a large amount of toxic and harmful gases such as ammonia and naphthalene are discharged along with the tar residue. The direct discharge between the slag outlet of the tar ammonia clarification tank and the cement tank has caused great pollution to the environment and posed a threat to the health of workers.

[0004] Because tar residue boxes are difficult to transport and take a long time to go back and forth, and workers are in close contact with the tar residue boxes, the environment is repeatedly polluted during transportation. The action of dumping the tar residue is cumbersome and the box is easily covered with tar. The technology for handling tar residue is backward, causing serious environmental pollution, failing to meet the national requirements for pollutant treatment, and the tar residue has no utilization value.

[0005] Coking plants produce a large amount of solid wastes such as coke powder, tar residue and activated sludge during dry quenching, tar precipitation and biochemical treatment of sewage. If these solid wastes are not treated and utilized and randomly piled up, they will not only pollute water and soil, harm the environment, but also waste a lot of precious resources. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a tar slag collection, loading, transportation, unloading, mixing and utilization system and process. The system realizes the full sealing and harmlessness of the tar slag collection, loading, transportation, unloading and mixing processes, the mechanization and automation of the tar slag collection, loading, transportation, unloading and mixing processes, and the effective utilization of solid wastes such as coke powder, tar slag and activated sludge.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A tar slag collection, loading, transportation, unloading, mixing and utilization system comprises a screw conveyor, a temporary slag storage tank, a loading sealing device, a tar slag mobile storage hopper, an AGV trolley, a unloading device, a receiving hopper, a mixer and a belt conveyor unit; the feeding port of the screw conveyor is sealed and connected to the slag discharge port of the scraper trough through a pipeline, and its unloading port is sealed and connected to the pipeline of the temporary slag storage tank; the main pipeline at the outlet of the temporary slag storage tank is sealed and connected to the tar slag mobile storage hopper through the loading sealing device, and the tar slag mobile storage hopper is placed on the AGV trolley; the unloading device turns over the tar slag mobile storage hopper to pour the tar slag into the receiving hopper, the receiving hopper is sealed and connected to the mixer through a pipeline, and the mixer is sealed and connected to the belt conveyor unit through a pipeline.

[0009] The top of the temporary slag storage tank is sealed and connected to the discharge port of the screw conveyor through a pipeline, a hot water pipe is spirally distributed outside the temporary slag storage tank, the discharge port at the bottom of the slag storage tank is connected to a gate valve, an expansion joint is connected below the gate valve, the expansion joint is connected to the first plunger pump system, and the first plunger pump system is connected to the main pipeline at the outlet of the temporary slag storage tank.

[0010] The main outlet pipeline of the temporary slag storage tank is provided with a valve, and the main outlet pipeline of the temporary slag storage tank is provided with a branch pipeline connected to the scraping tank, and the branch pipeline is provided with a valve; the collecting hopper is connected to the second plunger pump system, and the second plunger pump system is connected to the mixer.

[0011] The tar slag mobile storage hopper includes a frame, a hopper body, a counterweight lever and a sealing cover; the hopper body is fixed in the frame, and the side of the hopper body is semi-spiral; the counterweight lever and the sealing cover are installed on the rotating shaft, and the rotating shaft is installed on the frame; there is a slot on each side of the frame, and a column foot is provided at the bottom; an electric gate valve and a level meter are installed on the sealing cover, a water seal groove is provided above the electric gate valve, and a sealing ring is provided around the bottom of the sealing cover.

[0012] The loading sealing device includes a sealing cover, a metal hose, an exhaust pipe and a first hydraulic cylinder; the sealing cover is fixedly connected to the push rod of the first hydraulic cylinder, the top of the sealing cover is provided with an inverted funnel-shaped closing, and the bottom is provided with a horizontal annular knife beam, one end of the metal hose is connected to the main pipeline of the temporary slag storage tank outlet, and the other end extends into the sealing cover from the closing of the sealing cover; one end of the exhaust pipe is connected to the closing, and the other end is connected to the negative pressure exhaust gas pipeline.

[0013] A flat bumper is arranged in the front of the AGV trolley, and a square cone groove is arranged on the top surface.

[0014] The unloading device includes a flip body, a rack and a second hydraulic cylinder; one end of the flip body is provided with an insertion strip, and the other end is provided with a semicircular gear, the flip body is hinged on the receiving hopper, the semicircular gear is meshed with the rack, the rack is fixedly connected to the second hydraulic cylinder push rod, and the second hydraulic cylinder base is fixedly connected to the receiving hopper.

[0015] The belt conveyor group includes a first belt conveyor, a second belt conveyor and a third belt conveyor; the first belt conveyor, the second belt conveyor and the top inlet of the mixer are sealed and connected via a pipeline, and the bottom outlet of the mixer is sealed and connected to the third belt conveyor via a pipeline.

[0016] A tar residue collection, loading, transportation, unloading, and mixing process specifically comprises the following steps:

[0017] 1) The tar slag is discharged through the slag discharge port of the tar ammonia clarification machine scraper trough, enters the screw conveyor from the inlet of the screw conveyor, is transported and collected by the screw conveyor, and is discharged into the temporary slag storage tank from the discharge port of the screw conveyor;

[0018] 2) The tar slag mobile storage hopper is placed on the AGV trolley. The AGV trolley drives to the bottom of the charging sealing device. The electric gate valve of the sealing cover of the tar slag mobile storage hopper is opened. The hydraulic cylinder of the charging sealing device pushes the horizontal annular knife beam downward and inserts it into the water seal groove to achieve sealing;

[0019] 3) The tar slag in the temporary slag storage tank is pumped into the metal hose of the charging sealing device through the main pipeline at the outlet of the temporary slag storage tank by the first plunger pump system, and then injected into the mobile storage hopper of the tar slag by the metal hose; the amount of tar slag in the mobile storage hopper of the tar slag is measured by the level meter, and when the amount reaches the set value, the valve on the main pipeline is closed to stop injecting tar slag into the mobile storage hopper of the tar slag;

[0020] 4) The electric gate valve of the sealing cover is closed, and the first hydraulic cylinder of the charging sealing device drives the horizontal annular knife beam to move upward and leave the water seal groove;

[0021] 5) If the water accumulation in the temporary slag storage tank exceeds the set value, close the main pipeline valve at the slag storage tank outlet, open the branch pipeline valve, and pump the accumulated water into the tar ammonia clarification mechanical scraper tank through the first plunger pump system;

[0022] 6) The AGV trolley carries the tar slag mobile storage hopper to the receiving hopper, inserts the unloading device inserts into the slots on both sides of the tar slag mobile storage hopper, and the second hydraulic cylinder of the unloading device drives the tar slag mobile storage hopper to flip, and the sealing cover of the storage hopper is driven to open by the counterweight lever, and the tar slag in the storage hopper is poured into the receiving hopper;

[0023] 7) The tar residue in the receiving hopper is pumped into the mixer through the sealed pipeline and the second plunger pump system, and the various coking coals from the coal storage bunker are sent into the mixer through the first belt conveyor and the sealed pipeline, and the activated sludge and coke powder are sent into the mixer through the second belt conveyor and the sealed pipeline;

[0024] 8) The above materials are mixed in a mixer, and the evenly mixed materials are transported to the coal tower through the third belt conveyor.

[0025] The tar residue, coke powder and activated sludge in step 7 include the following three proportions:

[0026] 1) The weight percentage contents of tar residue, coke powder and activated sludge are: coke powder 1.5%, tar residue 1.9%, activated sludge: 1.2%;

[0027] 2) Activated sludge and coke powder replace part of lean coal and enter the coal blending system for coking. The added weight ratio shall not exceed 2% of the total coke, and the weight ratio of activated sludge to coke powder shall be 1:3.2;

[0028] 3) Tar residue replaces 1 / 3 of the weight of coking coal and enters the coal blending system for coking, and the addition ratio is 2.5% to 4.8% of the weight of the whole coke.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The scraping trough of the tar ammonia clarification machine of the present invention is connected to the screw conveyor through a pipeline seal, the screw conveyor is connected to the temporary slag storage tank through a pipeline seal, the tar slag is loaded from the temporary slag storage tank into the tar slag mobile storage hopper through a loading sealing device, the receiving hopper is connected to the mixer through a pipeline seal, and the belt conveyor unit is connected to the mixer through a pipeline seal.

[0031] The present invention realizes the whole process of sealing the tar slag from the slag discharge port of the tar ammonia water clarification mechanical scraper trough to the coal blending system, and the drainage and exhaust are both extracted through pipelines. There is no overflow of waste slag, waste water and waste gas in the whole process, and the whole process is harmlessly treated, which is beneficial to environmental protection.

[0032] 2. The hot water pipes are spirally distributed on the outside of the temporary slag storage tank of the present invention, which can heat the materials in the temporary slag storage tank. The discharge port at the bottom of the slag storage tank is a pipeline discharge, which is connected to a fully sealed electro-hydraulic gate valve. A stainless steel expansion joint is connected below the gate valve to offset thermal deformation.

[0033] 3. The main outlet pipeline of the temporary slag storage tank of the present invention is provided with a branch pipeline connected to the scraping tank, and the branch pipeline is provided with a valve; if there is a lot of water accumulated in the temporary slag storage tank, it can be pumped back to the scraping tank of the tar ammonia clarification machine through the branch pipeline by the first plunger pump system; the exhaust pipe of the charging sealing device is connected to the negative pressure exhaust pipe of the scraping tank of the tar ammonia clarification machine to facilitate the discharge of waste gas, and a valve is provided to prevent gas leakage when not working.

[0034] 4. The mobile storage hopper for tar slag of the present invention is provided with a sealing cover on the top, an electric gate valve and a material level meter are installed on the sealing cover, a water seal groove is provided above the electric gate valve, a sealing ring is provided around the bottom of the sealing cover, and a loading sealing device is also provided; the sealing of the process of loading the tar slag from the temporary slag storage tank into the mobile storage hopper for tar slag is ensured, and no waste slag, waste water or waste gas overflows.

[0035] 5. The present invention is provided with a loading sealing device, an AGV trolley and a unloading device; the whole process of loading the tar slag from the temporary slag storage tank into the mobile storage hopper, transporting it to the receiving hopper, and unloading the tar slag from the mobile storage hopper into the receiving hopper is mechanized and automated, which not only reduces the labor intensity of the operators, but also ensures the personal safety of the operators, and at the same time improves the operating efficiency.

[0036] 6. The present invention uses AGV trolleys for transportation. The AGV trolleys are equipped with electromagnetic automatic guidance devices and can travel along the specified guidance path. They are transport vehicles with safety protection and various transfer functions. Three AGVs, a control computer (console), navigation equipment, charging equipment and peripheral accessories form an AGV system. Under the monitoring and task scheduling of the control computer, the AGV trolley can accurately walk along the specified path. After arriving at the specified task location, it completes a series of work tasks. The control computer can decide whether to go to the charging area for automatic charging based on the AGV's own power.

[0037] 7. The mobile storage hopper for tar residue is equipped with column feet to support the storage hopper. There is an inverted square cone on the AGV trolley frame. The bottom of the square cone is the column foot size + 1mm tolerance. When the mobile storage hopper is lowered onto the AGV trolley frame, it can be automatically centered without the need to use various detection instruments to determine whether the storage hopper has returned to its position.

[0038] 8. A flat bumper is made in front of the AGV frame, with an angle of ±60 degrees on both sides of a width of 1 meter. A guide frame and positioning slots are installed on the ground in the target area to ensure that the parking accuracy of the AGV is within 10mm. This not only ensures the parking accuracy of the AGV, but also reduces the cost investment of various measurements and remote control equipment used for positioning accuracy.

[0039] 9. The present invention effectively utilizes tar residue, coke powder and activated sludge for coking coal blending, turning waste into treasure, not only avoiding water and soil pollution, but also making full use of resources, bringing huge economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic front view of the structure of the collecting and loading part of the present invention;

[0041] Figure 2 for Figure 1 A partial enlarged view of

[0042] Figure 3 It is a schematic side view of the structure of the collecting and loading part of the present invention;

[0043] Figure 4 This is a schematic front view of the tar slag mobile storage hopper and the AGV trolley structure of the present invention;

[0044] Figure 5 It is a schematic side view of the structure of the tar slag mobile storage hopper and the AGV trolley of the present invention;

[0045] Figure 6 This is a schematic top view of the tar slag mobile storage hopper and the AGV trolley structure of the present invention;

[0046] Figure 7 It is a schematic diagram of the structure of the tar slag mobile storage hopper, AGV trolley, unloading device and receiving hopper of the present invention.

[0047] Figure 8 It is a schematic diagram of the structure of the unloading and mixing part of the present invention.

[0048] In the figure: 1-shaftless screw conveyor; 2-temporary slag storage tank; 3-charging sealing device; 4-tar slag mobile storage hopper; 5-AGV trolley; 6-unloading device; 7-collecting hopper; 8-double screw mixer; 9-tar ammonia clarification mechanical scraping tank; 10-first plunger pump system; 11-negative pressure exhaust gas pipeline; 12-first belt conveyor; 13-second belt conveyor; 14-third belt conveyor; 15-second plunger pump system; 21-hot water pipe; 22-full Sealed electric hydraulic gate valve; 23-expansion joint; 101-electric ball valve; 31-sealing cover; 32-metal hose; 33-exhaust pipe; 34-first hydraulic cylinder; 41-frame; 42-bucket body; 43-counterweight lever; 44-sealing cover; 441-electric gate valve; 442-water seal groove; 45-slot; 46-column foot; 47-rotating shaft; 51-conical groove; 52-button; 61-rack; 62-second hydraulic cylinder; 63-slot; 64-semicircular gear; DETAILED DESCRIPTION

[0049] Example:

[0050] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0051] like Figure 1-8 As shown, a tar slag collection, loading, transportation, unloading, mixing and utilization system includes a shaftless screw conveyor 1, a temporary slag storage tank 2, a loading sealing device 3, a tar slag mobile storage hopper 4, an AGV trolley 5, a unloading device 6, a receiving hopper 7, a double-screw mixer 8, a first plunger pump system 10, a first belt conveyor 12, a second belt conveyor 13 and a third belt conveyor 14.

[0052] Two shaftless screw conveyors 1 and four tar ammonia clarification machine scraper troughs 9 are symmetrically distributed in pairs. The slag discharge ports of the two tar ammonia clarification machine scraper troughs 9 on the left are respectively connected to the two feeding ports on the top of the shaftless screw conveyor 1 on the left through φ159 pipe seals, and the slag discharge ports of the two tar ammonia clarification machine scraper troughs 9 on the right are respectively connected to the two feeding ports on the top of the shaftless screw conveyor 1 on the right through φ159 pipe seals. The discharge ports of the shaftless screw conveyors 1 on the left and right sides are respectively connected to the feeding ports on the top of the temporary slag storage tank 2 through φ159 pipe seals, and the materials are uniformly collected from the discharge ports of the shaftless screw conveyors 1 to the temporary slag storage tank 2.

[0053] The outside of the temporary slag storage tank 2 is heated by a spirally distributed hot water pipe 21. The discharge port at the bottom of the slag storage tank is a φ450 pipeline discharge, connected to a 450 fully sealed electro-hydraulic gate valve 22, and a stainless steel expansion joint 23 is connected below the gate valve to offset thermal deformation.

[0054] The expansion joint 23 is reduced to a φ219 pipe below, and the first plunger pump system 10 is used. The first plunger pump system 10 adopts an ASBN-7 secondary structure plunger pump system. The first plunger pump system 10 can stably pump out semi-solid and semi-liquid viscous liquids such as tar slag, and lift and transport tar slag. The first plunger pump system 10 is connected to the main outlet pipeline of the temporary slag storage tank 2. The main outlet pipeline of the temporary slag storage tank 2 is a φ70 steel pipe, and a branch pipeline is provided. The branch pipeline is also a φ70 steel pipe.

[0055] Electric ball valves 101 are provided on the main outlet pipe and the branch pipe of the temporary slag storage tank 2. When the incoming material is tar slag, the electric ball valve 101 on the main pipe is opened, the electric ball valve 101 on the branch pipe is closed, and the tar slag passes through; when the incoming material is water or there is a lot of water accumulated in the temporary slag storage tank 2, the electric ball valve 101 on the main pipe is closed, the electric ball valve 101 on the branch pipe is opened, and the accumulated water is pumped back to the tar ammonia clarification mechanical scraper tank 9 by the first plunger pump system 10 through the branch pipe.

[0056] The tar slag mobile storage hopper 4 includes a frame 41, a hopper body 42, a counterweight lever 43 and a sealing cover 44. Six column feet 46 are provided at the bottom of the frame 41 to support the storage hopper. There are six 45-degree inverted square cone grooves 51 on the frame of the AGV trolley 5. The bottom of the square cone groove 51 is the size of the column foot 46 + 1mm tolerance. When the tar slag mobile storage hopper 4 is lowered onto the frame of the AGV trolley 5, it can be automatically centered without using various detection instruments to determine whether the storage hopper is in place.

[0057] The bucket body 42 is fixedly connected in the frame 41, and the side of the bucket body 42 is semi-spiral, which is convenient for pouring out the tar slag. There is a slot 45 on each side of the frame 41, which is used for fixing the tar slag mobile storage bucket 4 when pouring.

[0058] A rotating shaft 47 is arranged at a right angle to the outer side of the tar slag mobile storage hopper frame 41, a sealing cover 44 of the tar slag mobile storage hopper is fixed to one end of the rotating shaft 47, and a counterweight lever 43 is fixed to the other end of the rotating shaft. In this way, the sealing cover 44 can be fully opened as the tar slag mobile storage hopper 4 is tilted.

[0059] The sealing cover 44 of the mobile storage hopper for tar slag is equipped with an electric gate valve 441. When the electric gate valve 441 is opened, a large enough hole is exposed to ensure the discharge of tar slag and the collection and negative pressure discharge of waste gas. A water seal groove 442 is arranged above the electric gate valve 441 on the sealing cover of the mobile storage hopper for tar slag. A rubber sealing ring is bonded to the part where the lower periphery of the sealing cover 44 of the mobile storage hopper for tar slag intersects with the storage hopper body to make the storage hopper tightly sealed. A thundering material level meter is installed on the sealing cover 44 of the mobile storage hopper for tar slag to measure the tar slag storage in the mobile storage hopper for tar slag. When the material level requirement is reached, the tar slag stops feeding.

[0060] The charging sealing device 3 includes a sealing cover 31, a metal hose 32, an exhaust pipe 33 and a first hydraulic cylinder 34. The sealing cover 31 is fixedly connected to the push rod of the first hydraulic cylinder 34. The top of the sealing cover 31 is provided with an inverted funnel-shaped closing, and the bottom is provided with a horizontal annular knife beam. One end of the metal hose 32 is connected to the main pipeline at the outlet of the temporary slag storage tank 2, and the other end extends from the sealing cover closing into the sealing cover 31; the exhaust pipe 33 is made of a metal hose, one end of which extends into the closing, and the other end is connected to the negative pressure exhaust gas pipeline 11. The horizontal annular knife beam is inserted into the water seal groove 442 to play a sealing role.

[0061] A flat bumper 52 is formed in front of the AGV 5 frame, with an angle of ±60 degrees on both sides of a width of 1 meter. A guide frame and a positioning slot are installed on the ground of the target area to ensure that the parking accuracy of the AGV is within the range of 10mm. This not only ensures the parking accuracy of the AGV, but also reduces the cost investment of various measurements and remote control equipment for positioning accuracy.

[0062] The AGV trolley 5 is equipped with an electromagnetic automatic guidance device, which can travel along the specified guidance path. It is a transport vehicle with safety protection and various transfer functions. Three AGVs, a control computer (console), navigation equipment, charging equipment and peripheral accessories form an AGV system. Under the monitoring and task scheduling of the control computer, the AGV trolley 5 can accurately travel along the specified path, and after arriving at the specified task location, it can complete a series of work tasks. The control computer can decide whether to go to the charging area for automatic charging based on the AGV's own power.

[0063] The AGV trolley 5 adopts a four-wheel structure with two rear wheels independently driven for differential steering and two front wheels as universal wheels. The stepper motor provides driving force through the drive wheel after passing through the reducer, and differential steering can be achieved when the two wheels move at different speeds.

[0064] ① The body of the AGV 5 consists of a chassis, a frame, a shell, a control room, and corresponding mechanical and electrical structures such as a reduction box, an integrated closed-loop stepper motor, wheels, etc. It is the basic part of the AGV 5. It has the structural characteristics of an electric vehicle and the special requirements of unmanned automatic operation. The frame is usually welded with steel components, and the lower the center of gravity, the more conducive it is to anti-rollover. The board is equipped with a transfer device, an electronic control system, buttons, a display screen, etc.

[0065] ② The frame is the body of the entire AGV 5, mainly used to install wheels, light sensors, servo motors and reducers. The servo motor driver, PCD board and battery are installed on the frame. The frame is designed with cast aluminum alloy, grade 6061, which has sufficient strength and hardness, is relatively light and has good weldability.

[0066] ③The wheels are made of solid rubber tires. The two driving wheels at the rear of the vehicle body are fixed driving wheels, connected to the hub motor. The two follower wheels at the front are rotating follower wheels, which play the role of supporting and balancing the vehicle.

[0067] ④ In order to avoid collisions when the AGV system fails or people pass through the working route of the AGV, the AGV is generally equipped with obstacle detection and collision avoidance, alarm sound, alarm vision, emergency stop and other devices. In addition, there are auxiliary devices such as automatic charging.

[0068] ⑤ The control console uses an ordinary PC. The control console receives the AGV 5 transportation task issued by the main control computer through the computer network, and collects the status information of each AGV 5 in real time through the wireless communication system. According to the demand and the current operation status of each AGV, the dispatch command is passed to the selected AGV 5. After completing a transportation task, the AGV 5 waits for the next task at the standby station. In order to speed up the wireless communication between the control console and the AGV 5 and the scheduling of the AGV 5 based on this, the multi-threaded mode is used in the programming, so that the communication and scheduling modules do not affect each other, and the system speed is accelerated.

[0069] ⑥ On the one hand, the communication system accepts commands from the monitoring system and transmits them to other corresponding subsystems in a timely and accurate manner to complete the actions specified by the monitoring system; on the other hand, it receives feedback from each subsystem and sends it back to the monitoring system as the basis for coordination, management, and control of the monitoring system.

[0070] ⑦ The function of the AGV navigation system is to ensure that the AGV 5 walks along the correct path and ensures a certain walking accuracy. The AGV 5 adopts a fixed route guidance method using electromagnetic guidance.

[0071] ⑧AGV car 5 uses battery as the only power source used. It is used to drive the car body and the auxiliary devices on the car, such as control, communication, safety, etc.

[0072] The unloading device 6 includes a turning body, a rack 61 and a second hydraulic cylinder 62; a plug 63 is provided at one end of the turning body, and a semicircular gear 64 is provided at the other end. The turning body is hinged on the receiving hopper 7, and the semicircular gear 64 is meshed with the rack 61. The rack 61 is fixedly connected to the push rod of the second hydraulic cylinder 62, and the base of the second hydraulic cylinder 62 is fixedly connected to the receiving hopper 7. The extension and contraction of the rack 61 is driven by the second hydraulic cylinder 62, and the extension of the rack 61 drives the semicircular gear 64 to rotate. The tar slag mobile storage hopper 4 is driven by the plug 63 and rotates with the gear 64 as the center of the circle. The storage hopper naturally turns over, and the sealing cover 44 of the storage hopper is driven to open by the counterweight lever 43, and all the tar slag in the storage hopper is dumped out.

[0073] The outside of the receiving hopper 7 is heated by spirally distributed hot water pipes. The discharge port at the bottom of the receiving hopper is connected to a φ219 pipeline to enter the second plunger pump system 15. The second plunger pump system 15 adopts an ASBN-7 secondary structure plunger pump system. The second plunger pump system 15 pumps the tar slag into the tar slag inlet of the double-screw mixer 8 through a DN80 flange metal hose. The second plunger pump system 15 can measure the weight of the tar slag.

[0074] The belt conveyor group includes a first belt conveyor 12, a second belt conveyor 13 and a third belt conveyor 14; the first belt conveyor 12, the second belt conveyor 13 and the top feed port of the double-screw mixer 8 are connected by a pipeline seal, and the bottom discharge port of the double-screw mixer 8 is connected by a pipeline seal to the third belt conveyor 14.

[0075] A tar residue collection, loading, transportation, unloading, and mixing process specifically comprises the following steps:

[0076] 1) The tar residue is discharged through the slag discharge port of the tar ammonia clarification mechanical scraper trough 9, enters the shaftless screw conveyor 1 through the feed port of the shaftless screw conveyor 1, is transported and collected by the shaftless screw conveyor 1, and the tar residue is uniformly discharged into the temporary slag storage tank 2 through the discharge port of the shaftless screw conveyor 1.

[0077] 2) The tar slag mobile storage hopper 4 is placed on the AGV trolley 5, and the AGV trolley 5 drives to the bottom of the charging sealing device 3, the electric gate valve 441 of the sealing cover 44 of the tar slag mobile storage hopper 4 is opened, and the first hydraulic cylinder 34 of the charging sealing device pushes the horizontal annular knife beam to move downward and insert it into the water seal groove 442 to achieve sealing;

[0078] 3) The tar slag in the temporary slag storage tank 2 is pumped into the metal hose 32 of the charging sealing device 3 through the first plunger pump system 10 through the main pipeline at the outlet of the temporary slag storage tank, and is injected into the tar slag mobile storage hopper 4 through the metal hose 32; the amount of tar slag in the tar slag mobile storage hopper is measured by a level meter, and when the amount reaches the set value, the electric ball valve 101 on the main pipeline is closed to stop injecting tar slag into the tar slag mobile storage hopper;

[0079] 4) The electric gate valve 441 of the sealing cover 44 is closed, and the first hydraulic cylinder 34 of the charging sealing device drives the horizontal annular knife beam to move upward and leave the water seal groove 442;

[0080] 5) If the water accumulation in the temporary slag storage tank 2 exceeds the set value, close the electric ball valve 101 of the main pipeline at the outlet of the temporary slag storage tank, open the electric ball valve 101 of the branch pipeline, and pump the accumulated water into the scraper tank 9 of the tar ammonia clarification machine through the first plunger pump system 10;

[0081] 6) The AGV trolley 5 carries the tar slag mobile storage hopper 4 to the receiving hopper 7, inserts the insertion strips 63 of the unloading device 6 into the slots 45 on both sides of the tar slag mobile storage hopper 4, and the second hydraulic cylinder 62 of the unloading device drives the tar slag mobile storage hopper 4 to flip, and the sealing cover 44 of the storage hopper is driven to open by the counterweight lever 43, and the tar slag in the storage hopper is poured into the receiving hopper 7;

[0082] 7) The tar residue in the receiving hopper 7 is pumped into the double-screw mixer 8 through the sealed pipeline and the second plunger pump system 15;

[0083] Various kinds of coking coal from 32 coal storage bins, such as lignite, long flame coal, gas coal, fat coal, coking coal, lean coal, meagre coal, anthracite, etc., are quantitatively discharged to the first belt conveyor 12 by the disc feeder according to the proportion required for coking. The collected various kinds of coal enter the main inlet of the double screw mixer 8 through the first belt conveyor 12;

[0084] After dehydration and drying in the sludge treatment system, the activated sludge enters the sludge concrete silo, and the coke powder enters the coke powder concrete silo after being collected. The two materials are quantitatively discharged by the disc feeder to the second belt conveyor 13, and then sent to the double screw mixer 8 through the second belt conveyor 13;

[0085] 8) The above materials are mixed by the double-screw mixer 8, and the mixed materials are conveyed by the third belt conveyor 14. The third belt conveyor 14 temporarily stores the mixed coal and solid waste into the coal tower through a fully sealed rotary distributor, waiting to be loaded into the furnace for coking.

[0086] According to the characteristics of solid waste and the actual situation on site, solid waste (tar residue and activated sludge) in appropriate proportion is added to the coal for coking without affecting the quality of coke. The results show that it is feasible to add an appropriate amount of solid waste to the coal for coking.

[0087] Under the premise of ensuring the quality of coke, the following matching results were obtained through experiments:

[0088] A. The optimal addition amounts of tar residue, coke powder and activated sludge (in proportion to the total coke weight) are: coke powder: 1.5%; tar residue: 1.9%; activated sludge: 1.2%.

[0089] B. Activated sludge and coking dust ash can replace part of the lean coal and enter the coal blending system for coking. Generally, the added weight ratio does not exceed 2% of the total coke, and the added weight ratio between activated sludge and coking dust ash should be 1:3.2.

[0090] C. Tar residue can replace part of 1 / 3 of coking coal and enter the coal blending system for coking. The added weight ratio is 2.5-4.8% of the total coke. Under the premise of not affecting the quality of coke, the lump coke rate of coke can be significantly improved by reducing the particle size of tar residue. If grinding equipment is added to the system to make the particle size of tar residue less than 0.25mm, the quality of coke can be guaranteed.

[0091] The present invention realizes full sealing and harmlessness of the tar slag gathering, loading, transportation, unloading and mixing processes, realizes the mechanization and automation of the tar slag gathering, loading, transportation, unloading and mixing processes, and realizes the effective utilization of solid wastes such as coke powder, tar slag and activated sludge.

[0092] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tar residue collection, loading, transportation, unloading, mixing and utilization system, characterized by: It includes a screw conveyor, a temporary slag storage tank, a charging sealing device, a tar slag mobile storage hopper, an AGV trolley, a discharging device, a collecting hopper, a mixer and a belt conveyor unit; the feeding port of the screw conveyor is sealed and connected with the slag discharge port of the scraper trough through a pipeline, and its discharging port is sealed and connected with the pipeline of the temporary slag storage tank; the main pipeline at the outlet of the temporary slag storage tank is sealed and connected with the tar slag mobile storage hopper through a charging sealing device, and the tar slag mobile storage hopper is placed on the AGV trolley; the discharging device turns over the tar slag mobile storage hopper and pours the tar slag into the collecting hopper, the collecting hopper is sealed and connected with the mixer through a pipeline, and the mixer is sealed and connected with the belt conveyor unit through a pipeline; The tar slag mobile storage hopper comprises a frame, a hopper body, a counterweight lever and a sealing cover; the hopper body is fixed in the frame, and the side of the hopper body is semi-spiral; the counterweight lever and the sealing cover are mounted on the rotating shaft, and the rotating shaft is mounted on the frame; there is a slot on each side of the frame, and a column foot is provided at the bottom; an electric gate valve and a material level meter are installed on the sealing cover, a water seal groove is provided above the electric gate valve, and a sealing ring is provided around the bottom of the sealing cover; The charging sealing device comprises a sealing cover, a metal hose, an exhaust pipe and a first hydraulic cylinder; the sealing cover is fixedly connected to the push rod of the first hydraulic cylinder, the top of the sealing cover is provided with an inverted funnel-shaped closing, the bottom is provided with a horizontal annular knife beam, one end of the metal hose is connected to the main pipeline at the outlet of the temporary slag storage tank, and the other end extends into the sealing cover from the closing of the sealing cover; one end of the exhaust pipe is connected to the closing, and the other end is connected to the negative pressure exhaust pipe; The unloading device comprises a turning body, a rack and a second hydraulic cylinder; a plug bar is provided at one end of the turning body and a semicircular gear is provided at the other end; the turning body is hinged on the receiving hopper, the semicircular gear is meshed with the rack, the rack is fixedly connected to the push rod of the second hydraulic cylinder, and the base of the second hydraulic cylinder is fixedly connected to the receiving hopper; The belt conveyor group includes a first belt conveyor, a second belt conveyor and a third belt conveyor; the first belt conveyor, the second belt conveyor and the top inlet of the mixer are sealed and connected via a pipeline, and the bottom outlet of the mixer is sealed and connected to the third belt conveyor via a pipeline.

2. A tar residue collection, loading, transportation, unloading, mixing and utilization system according to claim 1, characterized in that: The top of the temporary slag storage tank is sealed and connected to the discharge port of the screw conveyor through a pipeline, a hot water pipe is spirally distributed outside the temporary slag storage tank, the discharge port at the bottom of the slag storage tank is connected to a gate valve, an expansion joint is connected below the gate valve, the expansion joint is connected to the first plunger pump system, and the first plunger pump system is connected to the main pipeline at the outlet of the temporary slag storage tank.

3. The tar residue collection, loading, transportation, unloading, mixing and utilization system according to claim 1, characterized in that: The main outlet pipeline of the temporary slag storage tank is provided with a valve, and the main outlet pipeline of the temporary slag storage tank is provided with a branch pipeline connected to the scraping tank, and the branch pipeline is provided with a valve; the collecting hopper is connected to the second plunger pump system, and the second plunger pump system is connected to the mixer.

4. The tar residue collection, loading, transportation, unloading, mixing and utilization system according to claim 1, characterized in that: A flat bumper is arranged in the front of the AGV trolley, and a square cone groove is arranged on the top surface.

5. A process based on the tar residue collection, loading, transportation, unloading and mixing utilization system according to any one of claims 1 to 4, characterized in that: The specific steps include: 1) The tar slag is discharged through the slag discharge port of the tar ammonia clarification machine scraper trough, enters the screw conveyor from the inlet of the screw conveyor, is transported and collected by the screw conveyor, and is discharged into the temporary slag storage tank from the discharge port of the screw conveyor; 2) The tar slag mobile storage hopper is placed on the AGV trolley. The AGV trolley drives to the bottom of the charging sealing device. The electric gate valve of the sealing cover of the tar slag mobile storage hopper is opened. The hydraulic cylinder of the charging sealing device pushes the horizontal annular knife beam downward and inserts it into the water seal groove to achieve sealing. 3) The tar slag in the temporary slag storage tank is pumped into the metal hose of the charging sealing device through the main pipeline at the outlet of the temporary slag storage tank through the first plunger pump system, and then injected into the mobile storage hopper of the tar slag through the metal hose; the amount of tar slag in the mobile storage hopper of the tar slag is measured by the level meter, and when the amount reaches the set value, the valve on the main pipeline is closed to stop injecting tar slag into the mobile storage hopper of the tar slag; 4) The electric gate valve of the sealing cover is closed, and the first hydraulic cylinder of the loading sealing device drives the horizontal annular knife beam to move upward and leave the water seal groove; 5) If the water accumulation in the temporary slag storage tank exceeds the set value, close the main pipeline valve at the slag storage tank outlet, open the branch pipeline valve, and pump the accumulated water into the scraper tank of the tar ammonia clarification machine through the first plunger pump system; 6) The AGV trolley carries the tar slag mobile storage hopper to the receiving hopper, inserts the unloading device inserts into the slots on both sides of the tar slag mobile storage hopper, and the second hydraulic cylinder of the unloading device drives the tar slag mobile storage hopper to flip, and the sealing cover of the storage hopper is driven to open by the counterweight lever, and the tar slag in the storage hopper is poured into the receiving hopper; 7) The tar residue in the receiving hopper is pumped into the mixer through the sealed pipeline and the second plunger pump system. The various coking coals from the coal storage bunker are sent into the mixer through the first belt conveyor and the sealed pipeline. The activated sludge and coke powder are sent into the mixer through the second belt conveyor and the sealed pipeline. 8) The above materials are mixed in a mixer, and the evenly mixed materials are transported to the coal tower through the third belt conveyor.

6. The tar residue collection, loading, transportation, unloading, mixing and utilization process according to claim 5, characterized in that: The step 7) tar residue, coke powder and activated sludge include the following three proportions: 1) The weight percentage content of tar residue, coke powder and activated sludge is: coke powder 1.5%, tar residue 1.9%, activated sludge: 1.2%; 2) Activated sludge and coke powder replace part of the lean coal and enter the coal blending system for coking. The added weight ratio shall not exceed 2% of the total coke, and the weight ratio of activated sludge to coke powder shall be 1:3.2; 3) Tar residue replaces 1 / 3 of the weight of coking coal and enters the coal blending system for coking, and the addition ratio is 2.5%~4.8% of the total coke weight.

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