CN214665625U - Single-stage multi-effect net chain closed type coal slime drying system - Google Patents

Abstract

The utility model discloses a single-stage multiple-effect net chain closed coal slime drying system, it includes desiccator and air feed device, and the desiccator includes dry cavity, is equipped with feed inlet and discharge gate on the dry cavity, is equipped with net chain conveyer and lower net chain conveyer in the dry cavity, and air feed device includes first heat pump set, second heat pump set and the first air cycle pipeline and the second air cycle pipeline of being connected with dry cavity respectively. The single-stage multi-effect net chain closed coal slime drying system is small in occupied area, low in energy consumption and low in operation cost, can achieve accurate drying, and does not discharge smoke and dust.

Description

Single-stage multi-effect net chain closed type coal slime drying system

Technical Field

The utility model relates to a coal slime drying field especially relates to a single-stage multiple-effect net chain closed coal slime drying system.

Background

China is a country rich in coal and less in oil, and coal is in a more-than-demand format for a long time. According to the investigation of coal mine washing plants all over the country, some coal slime produced in the coal production process is discharged and stacked in situ, because the coal slime is extremely unstable in shape and does not form by self-flow, the coal slime runs off when meeting water and flies after being dried in the air, the coal slime is abandoned as waste, the environmental protection problem is more serious than that of coal gangue washing, and extremely serious environmental pollution is produced. The other treatment mode is drying by using a dryer, the traditional coal slime drying process mainly comprises a high-temperature drying process of a hot blast stove and a steam heating low-temperature drying process, smoke emission and dust emission exist, the environment is protected, the standard is not easy to reach, the operation cost is high, and the steam low-temperature drying process is limited by a steam heat source.

The coal slime is as the by-product that produces among the washing process, and its transportation, storage, stack have a great deal of environmental protection problems such as environmental pollution occupation of land, and direct marketing economic value is extremely low, and the novel coal slime drying technology of clean, efficient is urgently needed at present, carries out drying process to the coal slime product to improve the economic, the environmental protection benefit of enterprise.

At present, the coal slime drying process adopted by coal mine coal preparation plants can be mainly divided into two main types.

(1) The high-temperature flue gas drying process comprises the following steps: and drying the coal slime filter cake by adopting a hot-blast stove and a roller dryer (or a fluidized bed). The water content of the filter cake of the filter press coal slime is reduced to 13-15% after the filter cake is dried, and the filter cake of the filter press coal slime is in a globular shape and sold separately or mixed with clean coal for external sale. The technology is mature, the yield is high, and a coal-fired hot air furnace and a gas-fired hot air furnace are selected for the hot air furnaces, the heat supply capacity of the coal-fired hot air furnace is below 20 steam tons, and the technology belongs to obsolete equipment; the gas storage source supply safety of the gas hot blast stove and the defects of overproof nitrogen oxide emission, high energy consumption, high operation cost and the like.

(2) And (3) a low-temperature steam drying process: the process utilizes the latent heat of vaporization of steam to heat and dry coal slurry. The steam is indirectly contacted with the coal slime through a steam rotary dryer (or a fluidized bed) to evaporate the moisture in the coal slime. The coal slime low-temperature steam rotary drying technology is a novel environment-friendly drying technology, but the coal slime low-temperature steam rotary drying technology takes steam as a drying heat source, is limited in heat source, has the problems of pollutant emission, dust removal, white elimination and the like, and has the defects of large equipment floor area, small capacity, high energy consumption, high operation cost and the like.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a single-stage multiple-effect net chain closed coal slime drying system, its area is little, the energy consumption is low, the running cost is low, can realize accurate drying to no flue gas, dust emission.

The utility model discloses single-stage multiple-effect network chain closed coal slime drying system, including desiccator and air feed device, the desiccator includes dry cavity, dry cavity's top is equipped with the feed inlet, dry cavity's below is equipped with the discharge gate, from the top down is equipped with network chain conveyer and lower network chain conveyer in proper order in the dry cavity, air feed device includes first heat pump set, second heat pump set and the first air cycle pipeline and the second air cycle pipeline of being connected with dry cavity respectively, the air that comes from dry cavity in the first air cycle pipeline returns dry cavity and is used for the coal slime on dry network chain conveyer after first heat pump set's condenser heating, the air that comes from dry cavity in the second air cycle pipeline returns dry cavity and is used for from the bottom up in proper order dry lower network chain conveyer after first heat pump set and second heat pump set's evaporimeter cooling dehumidification earlier, returns dry cavity after second heat pump set's condenser heating again Coal slime on the conveyor and the upper-link conveyor.

The utility model discloses a single-stage multiple-effect net chain closed coal slime drying system, wherein go up the net chain conveyer and include last drive sprocket, last driven sprocket and go up the net chain conveyer belt, go up drive sprocket and last driven sprocket and all rotate and install in the drying chamber, go up the net chain conveyer belt suit on last drive sprocket and last driven sprocket, go up the net chain conveyer belt and have seted up a plurality of blow vent along length direction, go up the drive sprocket and pass through last motor drive, lower net chain conveyer includes lower drive sprocket, lower driven sprocket and lower net chain conveyer belt, lower drive sprocket and lower driven sprocket all rotate and install in the drying chamber, lower net chain conveyer belt suit is on lower drive sprocket and lower driven sprocket, a plurality of lower blow vent have been seted up along length direction on the lower net chain conveyer belt, lower drive sprocket passes through lower motor drive, go up the net chain conveyer belt and the top of lower net chain conveyer belt and be equipped with material turning device respectively, the material turnover device comprises a rotating shaft which is rotatably arranged on the drying chamber, a plurality of turnover plates which are radially arranged are arranged on the rotating shaft, and the rotating shaft is driven by a turnover motor.

The utility model discloses a single-stage multiple-effect net chain closed coal slime drying system, wherein upper net chain conveyor and lower net chain conveyor divide the drying chamber into upper air chamber, hollow air chamber and lower air chamber from top to bottom, upper wind shield is arranged around the upper net chain conveyor, the upper wind shield is connected between the upper net chain conveyor and the drying chamber, lower wind shield is arranged around the lower net chain conveyor, the lower wind shield is connected between the lower net chain conveyor and the drying chamber, the drying chamber at one end of the upper net chain conveyor is provided with the feed inlet, the upper wind shield at the other end of the upper net chain conveyor is provided with an upper blanking port, one end of the lower net chain conveyor is positioned below the upper blanking port, the lower wind shield at the other end of the lower net chain conveyor is provided with a lower blanking port, the drying chamber below the lower blanking port is provided with the discharge port, one end of the first air circulation pipeline is connected to the upper air chamber of the drying chamber, the other end of the first air circulation pipeline is connected to the hollow air chamber of the drying chamber, one end of the second air circulation pipeline is connected to the upper air chamber of the drying chamber, and the other end of the second air circulation pipeline is connected to the lower air chamber of the drying chamber.

The utility model discloses a single-stage multiple-effect net chain closed coal slime drying system, wherein the feed inlet of drying chamber is equipped with broken bridge shaping cloth machine, broken bridge device and extrusion forming cloth device have been arranged from top to bottom in the broken bridge shaping cloth machine in proper order, the top of broken bridge shaping cloth machine is equipped with the feeding conveyer, the feeding conveyer includes feeding action wheel, feeding driven wheel and feeding conveyer belt, the feeding conveyer belt suit is on feeding action wheel and feeding driven wheel, the feeding action wheel is driven through the feeding motor, the both ends of feeding conveyer are feed end and blanking end respectively, the blanking end is located the straight top of broken bridge shaping cloth machine, the top of feeding conveyer is equipped with the de-ironing separator, the discharge outlet of drying chamber is equipped with the feed cylinder, the last port of feed cylinder is located the below of blanking mouth, the below of feed cylinder is equipped with spiral discharge machine, and the inlet of the spiral discharging machine is positioned below the lower port of the discharging barrel.

The utility model discloses a single-stage multiple-effect net chain closed coal slime drying system, wherein the interior bottom of drying cavity is equipped with scraper blade formula automatic ash removal device, scraper blade formula automatic ash removal device includes scraper blade, deashing drive sprocket, deashing driven sprocket and chain, deashing drive sprocket and deashing driven sprocket rotate respectively and locate the both ends of drying cavity interior bottom, the chain suit is on deashing drive sprocket and deashing driven sprocket, the deashing drive sprocket passes through the deashing motor drive, the scraper blade is connected in on the chain, be equipped with the ash tap that corresponds with the scraper blade on the play feed cylinder, the scraper blade includes socket joint spare and plug connector, the socket joint spare is triangle tubbiness structure, the bucket wall of socket joint spare is interconnect's first bottom bucket wall and two first side bucket walls, set up two spouts that arrange along socket joint spare length direction on the first bottom bucket wall, the plug connector is of a triangular columnar structure, the external shape of the plug connector is matched with the shape of the barrel cavity of the socket piece, the outer peripheral wall of the plug connector is an outer bottom wall and two outer side walls which are mutually connected, two sliding blocks are arranged on the outer bottom wall of the plug connector, the plug connector is inserted into the barrel cavity of the socket connector, the two sliding blocks are respectively positioned in the two sliding grooves, a plurality of elastic bulges are respectively arranged on the two outer side walls of the plug connector, the elastic bulges on each outer side wall are arranged along the length direction of the plug connector, the inner barrel wall of the socket piece is provided with a groove matched with the elastic bulge, one end of the chain is connected to a first side barrel wall of the socket piece and an outer side wall of the plug piece, the other end of the chain is connected to the other first side barrel wall of the socket piece and the other outer side wall of the plug piece.

The utility model discloses a single-stage multiple-effect net chain closed coal slime drying system, wherein net chain conveyer belt and lower net chain conveyer belt are all washd through net chain self-cleaning device, net chain self-cleaning device includes high-pressure air pump, high-pressure gas pitcher and high-pressure gas nozzle that connect gradually through the high-pressure gas pipeline, high-pressure gas nozzle includes the same first high-pressure gas nozzle and the second high-pressure gas nozzle of structure, first high-pressure gas nozzle locates between the upper and lower conveyer belt of upper net chain conveyer belt, first high-pressure gas nozzle is arranged towards the lower conveyer belt of upper net chain conveyer belt, second high-pressure gas nozzle locates between the upper and lower conveyer belt of lower net chain conveyer belt, second high-pressure gas nozzle is arranged towards the lower conveyer belt of lower net chain conveyer belt, first high-pressure gas nozzle and second high-pressure gas nozzle all include the first casing that is the tube-shape, the upper barrel opening and the lower barrel opening of the first shell are respectively an airflow inlet and an airflow outlet, the first shell comprises an upper barrel body and a lower barrel body which are arranged up and down, the inner diameter of the lower barrel body is larger than that of the upper barrel body, a first flow guide plugging seat is arranged in the upper barrel body of the first shell body in a sliding sealing manner, the first flow guide plugging seat is barrel-shaped, the barrel opening of the first flow guide plugging seat faces the upper barrel opening of the first shell body, the first flow guide plugging seat comprises a second bottom barrel wall and a second side barrel wall, a first airflow hole is formed in the second side barrel wall, a first guide column is connected to the outer side of the second bottom barrel wall, a first flow guide support frame is arranged in the lower barrel body, a first guide hole corresponding to the first guide column is formed in the first flow guide support frame, the first guide column is inserted into the first guide hole, and a second airflow through hole is formed in the first flow guide support frame, the second air flow through hole penetrates through the first flow guide support frame in the vertical direction, a first spring is connected between the first flow guide plugging seat and the first flow guide support frame, a first annular clamping table is fixedly arranged at the lower end of the inner cylinder wall of the upper cylinder body, the first flow guide plugging seat is arranged in the first annular clamping table in a sliding sealing mode, a first radial flange is fixedly arranged on the outer side of a barrel opening of the first flow guide plugging seat, a first clamping block is fixedly arranged at the lower end of the first guide column and located below the first flow guide support frame, and an internal thread used for connecting a high-pressure gas pipeline is arranged at the upper end of the inner cylinder wall of the upper cylinder body.

The utility model discloses a single-stage multiple-effect net chain closed coal slime drying system, wherein the one end of first air circulation pipeline and the one end of second air circulation pipeline all connect to the last air chamber of drying chamber through main air pipeline, be connected with first fan on the first air circulation pipeline, the air that comes from the last air chamber of drying chamber in the first air circulation pipeline returns the cavity air chamber of drying chamber after the condenser heating of first heat pump set, be connected with second fan, surface cooler and heat recovery device on the second air circulation pipeline, the surface cooler passes through cooling water circulation pipeline and is connected with the cooling tower, be connected with the cooling water circulating pump on the cooling water circulation pipeline, the air that comes from the last air chamber of drying chamber in the second air circulation pipeline cools down the dehumidification back through surface cooler, heat recovery device and the evaporimeter of first heat pump set and second heat pump set in proper order, and then the air returns to the lower air chamber of the drying chamber after being heated by the heat recoverer and the condenser of the second heat pump unit in sequence.

The utility model discloses single-stage multiple-effect net chain closed coal slime drying system, wherein surface cooler, heat recovery device and first heat pump set's condenser all washs through heat exchanger self-cleaning device, heat exchanger self-cleaning device is including deposiing the filtering ponds, be equipped with the washing circulating pump in the sedimentation filtering ponds, be connected with the washing feed pipe on the washing circulating pump, be connected with the washing nozzle on the washing feed pipe, it includes the first washing nozzle that the structure is the same, second washing nozzle and third washing nozzle to wash the nozzle, first washing nozzle is used for wasing the surface cooler, the second washing nozzle is used for wasing the heat recovery device, third washing nozzle is used for wasing first heat pump set's condenser, the heat recovery device is located first heat pump set and second heat pump set's evaporimeter top, the bottom of surface cooler, first heat pump set's condenser bottom and first heat pump set and second heat pump set's evaporimeter bottom part Is connected to the sedimentation and filtration tank through a water return pipe.

The utility model discloses a single-stage multiple-effect net chain closed coal slime drying system, wherein first washing nozzle, second washing nozzle and third washing nozzle all include the second casing that is the tubbiness, the bung hole of second casing is the rivers import, the barrel bottom of second casing is equipped with the rivers export, the second casing includes upper barrel body and lower barrel body that arranges from top to bottom, the internal diameter of lower barrel body is greater than the internal diameter of upper barrel body, sliding seal is equipped with second water conservancy diversion shutoff seat in the upper barrel body of second casing, second water conservancy diversion shutoff seat is the tubbiness, the bung hole of second water conservancy diversion shutoff seat is arranged towards the bung hole of second casing, second water conservancy diversion shutoff seat includes third bottom barrel wall and third barrel wall, seted up first rivers through-hole on the third barrel wall, the outside of third bottom barrel wall is connected with the second guide post, be equipped with second water conservancy diversion support frame in the lower barrel body, the second guide support frame is provided with a second guide hole corresponding to the second guide post, the second guide post is inserted into the second guide hole, a second water flow through hole is formed in the second guide support frame, the second water flow through hole penetrates through the second guide support frame along the vertical direction, a second spring is connected between the second guide plugging seat and the second guide support frame, a second annular clamping table is fixedly arranged at the lower end of the inner barrel wall of the upper barrel body, the second guide plugging seat is arranged in the second annular clamping table in a sliding and sealing mode, a second radial flange is fixedly arranged on the outer side of a barrel mouth of the second guide plugging seat, a second clamping block is fixedly arranged at the lower end of the second guide post, the second clamping block is located below the second guide support frame, and an internal thread used for connecting and cleaning a water supply pipe is arranged at the upper end of the inner barrel wall of the upper barrel body.

The utility model discloses single-stage multiple-effect net chain closed coal slime drying system, wherein the connection washing nozzle one end that washs the feed pipe is connected with first branch feed pipe, second branch feed pipe and third branch feed pipe, first branch feed pipe is connected with first washing nozzle, be equipped with first valve on the first branch feed pipe, the second divides the feed pipe to be connected with second washing nozzle, be equipped with the second valve on the second branch feed pipe, third branch feed pipe is connected with third washing nozzle, be equipped with the third valve on the third branch feed pipe, be equipped with dual discharge valve on the main air pipeline, air chamber extrinsic cycle air intake has been seted up to the lower of dry cavity, extrinsic cycle air intake department is equipped with dual admission valve, extrinsic cycle air intake department in the dry chamber is equipped with the third fan.

The utility model discloses single-stage multiple-effect net chain closed coal slime drying system is equipped with net chain conveyor and lower net chain conveyor from the top down in proper order in dry cavity, treat that dry coal slime gets into dry cavity from the feed inlet of dry cavity top, and fall on net chain conveyor, along with net chain conveyor's rotation, the coal slime is carried to net chain conveyor down by net chain conveyor on, later along with net chain conveyor's rotation down again, the coal slime is carried to the discharge gate of dry cavity below by lower net chain conveyor again, and be discharged. In the conveying process of the coal slime in the drying cavity, air from the drying cavity in the first air circulation pipeline is heated by a condenser of the first heat pump unit and then returns to the drying cavity for drying the coal slime on the upper net chain conveyor, air from the drying cavity in the second air circulation pipeline is cooled and dehumidified by evaporators of the first heat pump unit and the second heat pump unit, and then is heated by a condenser of the second heat pump unit and then returns to the drying cavity for drying the coal slime on the lower net chain conveyor and the upper net chain conveyor from bottom to top in sequence. Therefore, the air coming out of the drying chamber is divided into two paths, wherein one path enters the first air circulation pipeline and returns to the drying chamber through the first air circulation pipeline; the other path enters a second air circulation pipeline and returns to the drying chamber through the second air circulation pipeline. To sum up, the utility model discloses area is little, the energy consumption is low, the running cost is low, can realize accurate drying to no flue gas, dust discharge.

The present invention will be further explained with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of a single-stage multi-effect network chain closed coal slime drying system of the present invention;

fig. 2 is a schematic structural view of the dryer of the present invention;

fig. 3 is a schematic structural view of an upper net chain conveyor, a lower net chain conveyor and an automatic net chain cleaning device of the utility model;

fig. 4 is a schematic structural view of a middle feeding conveyor, a bridge breaking forming distributor, an upper chain conveyor, a lower chain conveyor, a spiral discharging machine and an automatic net chain cleaning device of the utility model;

FIG. 5 is a schematic structural view of the middle scraper type automatic ash removal device of the present invention;

FIG. 6 is a schematic structural view of a scraper blade according to the present invention;

FIG. 7 is a schematic structural view of the plug-in member of the present invention;

fig. 8 is a schematic structural view of the socket member of the present invention;

FIG. 9 is a schematic structural view of the bottom of the scraper blade of the present invention;

FIG. 10 is a front view of a high pressure gas nozzle according to the present invention;

fig. 11 is a front sectional view of the middle/high pressure gas nozzle of the present invention (the first flow guide plugging seat is in the plugging position);

fig. 12 is a front sectional view of the middle/high pressure gas nozzle of the present invention (the first flow guide block seat is in the conducting position);

fig. 13 is a front view of the first diversion plug seat of the present invention;

fig. 14 is a top view of the first diversion plug seat of the present invention;

fig. 15 is a top view of the first deflector support frame of the present invention;

fig. 16 is a schematic structural view of the air supply device of the present invention;

FIG. 17 is a front view of the cleaning nozzle of the present invention;

fig. 18 is a front cross-sectional view of a cleaning nozzle of the present invention (with the second diversion block seat in the blocking position);

fig. 19 is a front sectional view of the cleaning nozzle of the present invention (the second diversion block seat is in the conducting position);

fig. 20 is a front view of a second diversion plug seat of the present invention;

fig. 21 is a top view of a second diversion plug seat of the present invention;

fig. 22 is a top view of a second guide support frame according to the present invention.

Detailed Description

As shown in fig. 1, and as shown in fig. 2-22, the utility model discloses single-stage multiple-effect network chain closed coal slime drying system includes desiccator and air supply device, the desiccator includes drying chamber 6, drying chamber 6's top is equipped with the feed inlet, drying chamber 6's below is equipped with the discharge gate, from the top down is equipped with net chain conveyer 8 and net chain conveyer 17 down in proper order in drying chamber 6, the air supply device includes first heat pump set 49, second heat pump set 52 and respectively with the first air circulation pipeline 26 and the second air circulation pipeline 29 that drying chamber 6 is connected, the air that comes from drying chamber 6 in the first air circulation pipeline 26 returns drying chamber 6 and is used for the coal slime on the net chain conveyer 8 after the condenser 27 heating of first heat pump set 49, the air that comes from drying chamber 6 in the second air circulation pipeline 29 is earlier through evaporimeter 35, second heat pump set 52 of first heat pump set 49 and second heat pump set 35 of second heat pump set 35, 36, cooling and dehumidifying, heating by a condenser 37 of the second heat pump unit 52, and returning to the drying chamber 6 for drying the coal slime on the lower net chain conveyor 17 and the upper net chain conveyor 8 from bottom to top in sequence.

As shown in fig. 1 and shown in fig. 2-4, the single-stage multi-effect mesh chain closed coal slime drying system of the present invention comprises an upper driving sprocket, an upper driven sprocket and an upper mesh chain conveyor belt, wherein the upper driving sprocket and the upper driven sprocket are rotatably mounted in the drying chamber 6, the upper mesh chain conveyor belt is sleeved on the upper driving sprocket and the upper driven sprocket, a plurality of upper vents are formed on the upper mesh chain conveyor belt along the length direction, the upper driving sprocket is driven by the upper motor, the lower mesh chain conveyor 17 comprises a lower driving sprocket, a lower driven sprocket and a lower mesh chain conveyor belt, the lower driving sprocket and the lower driven sprocket are rotatably mounted in the drying chamber 6, the lower mesh chain conveyor belt is sleeved on the lower driving sprocket and the lower driven sprocket, the lower mesh chain conveyor belt is provided with a plurality of lower vents along the length direction, the lower driving chain wheel is driven by a lower motor. The net chain conveyor belongs to the prior art, and its theory of operation is motor drive sprocket, and drive sprocket passes through net chain conveyer belt and drives driven sprocket and rotate together, and net chain conveyer belt can be used for carrying the material. The top of going up net chain conveyer belt and lower net chain conveyer belt is equipped with material turning device 22 respectively, material turning device 22 locates the axis of rotation on drying chamber 6 including rotating, be equipped with a plurality of returning face plates of radially arranging in the axis of rotation, the axis of rotation is through upset motor drive. Under the action of the material turning device 22, the coal slime can be sufficiently turned to be dried.

As shown in fig. 1, and as shown in fig. 2-4, the single-stage multi-effect mesh-chain closed coal slurry drying system of the present invention comprises an upper mesh-chain conveyor 8 and a lower mesh-chain conveyor 17, which divide a drying chamber 6 into an upper air chamber, a hollow air chamber and a lower air chamber from top to bottom, wherein an upper wind shield 7 is disposed around the upper mesh-chain conveyor 8, the upper wind shield 7 is connected between the upper mesh-chain conveyor 8 and the drying chamber 6, a lower wind shield 9 is disposed around the lower mesh-chain conveyor 17, the lower wind shield 9 is connected between the lower mesh-chain conveyor 17 and the drying chamber 6, the drying chamber 6 at one end of the upper mesh-chain conveyor 8 is provided with the feeding port, the upper wind shield 7 at the other end of the upper mesh-chain conveyor 8 is provided with an upper blanking port 23, one end of the lower mesh-chain conveyor 17 is located below the upper blanking port 23, and the lower wind shield 9 at the other end of the lower mesh-chain conveyor 17 is provided with a lower blanking port 10, be equipped with on the drying chamber 6 of whereabouts material mouth 10 below the discharge gate, the one end of first air circulation pipeline 26 is connected in the last air chamber of drying chamber 6, the other end of first air circulation pipeline 26 is connected in the cavity air chamber of drying chamber 6, the one end of second air circulation pipeline 29 is connected in the last air chamber of drying chamber 6, the other end of second air circulation pipeline 29 is connected in the lower air chamber of drying chamber 6. It can be seen that the drying chamber 6 and the first air circulation line 26 form a closed air circulation, as does the drying chamber 6 and the second air circulation line 29.

As shown in fig. 1 and in conjunction with fig. 2, the upper and lower discharge openings 23 and 10 are respectively provided with a baffle 11, and the baffle 11 is used for guiding the coal slurry to fall.

As shown in fig. 1 to combine fig. 2, 4 to show, the utility model discloses single-stage multiple-effect net chain closed coal slime drying system, wherein the feed inlet department of drying chamber 6 is equipped with broken bridge shaping cloth machine 3, from the top down has arranged broken bridge device 5 and extrusion distributing device 4 in proper order in broken bridge shaping cloth machine 3, what need explain, broken bridge shaping cloth machine 3 belongs to prior art, no longer gives details here to its concrete structure and theory of operation. Broken bridge shaping cloth machine 3's top is equipped with feeding conveyor 1, feeding conveyor 1 includes the feeding action wheel, the feeding from driving wheel and feeding conveyer belt, feeding conveyer belt suit is in the feeding action wheel and the feeding from the driving wheel, the feeding action wheel passes through feeding motor drive, and when the feeding action wheel rotates, it can drive the feeding through the feeding conveyer belt and rotate from the driving wheel together, and the feeding conveyer belt can be used for carrying the material coal slime. The feed conveyor 1 belongs to the prior art, and the detailed structure and working principle thereof are not described herein again. The two ends of the feeding conveyor 1 are respectively a feeding end and a blanking end, the blanking end is positioned right above the bridge-breaking forming distributor 3, and the iron remover 2 is arranged above the feeding conveyor 1. Discharge gate department of drying chamber 6 is equipped with out feed cylinder 14, the last port that goes out feed cylinder 14 is located the below of blanking mouth 10, the below that goes out feed cylinder 14 is equipped with spiral discharge machine 15, the import of spiral discharge machine 15 is located the below of 14 lower ports of feed cylinder, and the export of spiral discharge machine 15 is used for discharging dry material coal slime. It should be noted that the bridge-breaking forming distributor 3, the iron remover 2 and the spiral discharging machine 15 are all in the prior art, and detailed descriptions of the specific structures and working principles thereof are omitted here.

As shown in fig. 1, and combine fig. 2, 5 to show, the utility model discloses single-stage multiple-effect net chain closed coal slime drying system, wherein the interior bottom of drying chamber 6 is equipped with scrapes the automatic ash removal device of board-like, it includes scraper blade 16, deashing driving sprocket 57, deashing driven sprocket 59 and chain 58 to scrape the automatic ash removal device of board-like, deashing driving sprocket 57 and deashing driven sprocket 59 rotate the both ends of locating the interior bottom of drying chamber 6 respectively, chain 58 suit is on deashing driving sprocket 57 and deashing driven sprocket 59, deashing driving sprocket 57 passes through the deashing motor drive, scraper blade 16 connect in on chain 58, be equipped with the ash outlet 56 corresponding with scraper blade 16 on going out feed cylinder 14. When the ash removal motor drives the ash removal driving sprocket 57 to rotate, the ash removal driving sprocket 57 drives the chain 58 and the ash removal driven sprocket 59 to rotate together, and the scraper 16 is connected to the chain 58, so that when the chain 58 rotates around the ash removal driving sprocket and the ash removal driven sprocket, the chain 58 can drive the scraper 16 to move back and forth between the ash removal driving sprocket and the ash removal driven sprocket so as to scrape ash. The scraper type automatic ash removal device is started periodically, collected ash at the bottom of the drying chamber 6 is scraped to the ash outlet 56 from one end far away from the ash outlet 56 through the scraper 16, and is discharged out of the drying chamber 6 together with coal slime, and the operation of scraping ash independently can be carried out.

As shown in fig. 6 and with reference to fig. 7-9, the scraper 16 includes a socket 60 and a plug 61, the socket 60 is a triangular barrel structure, the barrel walls of the socket 60 are a first bottom barrel wall 68 and two first side barrel walls 66 that are connected to each other, the first bottom barrel wall 68 is provided with two sliding grooves 69 that are arranged along the length direction of the socket 60, the plug 61 is a triangular column structure, the external shape of the plug 61 matches the barrel cavity shape of the socket 60, the external peripheral walls of the plug 61 are an external bottom wall 64 and two external side walls 63 that are connected to each other, the external bottom wall 64 of the plug 61 is provided with two sliding blocks 65, the plug 61 is inserted into the barrel cavity of the socket 60, the two sliding blocks 65 are respectively located in the two sliding grooves 69, the two external side walls 63 of the plug 61 are respectively provided with a plurality of elastic protrusions 62, every a plurality of elastic protrusions 62 on the lateral wall 63 all arrange along the length direction of plug connector 61, be equipped with on the inner barrel wall of socket 60 with elastic protrusion 62 assorted recess 67, the one end of chain 58 is connected on a first lateral barrel wall 66 of socket 60 and a lateral wall 63 of plug connector 61, the other end of chain 58 is connected on another first lateral barrel wall 66 of socket 60 and another lateral wall 63 of plug connector 61. Thus, during the rotation of chain 58, it pulls the entire scraper 16 in motion, while the scraper 16 is in motion, the first bottom tub wall 68 of socket 60 and the outer bottom wall 64 of plug 61 are against the bottom of drying chamber 6.

As shown in fig. 6 in conjunction with fig. 7-9, the length of the scraping plate 16 can be adjusted according to the actual situation, i.e. the depth of the plug 61 inserted into the socket 60 is adjusted, when the plug 61 is inserted into or withdrawn from the socket 60, the plug 61 slides in the barrel cavity of the socket 60, and at the same time, the sliding block 65 on the plug 61 slides along the sliding slot 69 on the socket 60. After the length of the scraper 16 is adjusted, the elastic protrusion 62 on the outer side wall 63 of the plug 61 is located in the groove 67 of the inner wall of the socket 60, and the two are clamped to play a limiting role, so that the length of the scraper 16 is fixed. Due to the elastic action of the elastic protrusion 62, when the length of the scraper 16 is adjusted, the elastic protrusion 62 can be pulled out or pushed out of the groove 67 by pulling or pushing the plug-in part 61 relative to the socket part 60, so that the clamping between the two parts is released, and then the scraper 16 is adjusted to the proper length. The elastic protrusion 62 may be made of elastic material such as rubber.

As shown in figure 1 and combined with figures 2-4, the single-stage multi-effect net chain closed coal slime drying system of the utility model, wherein the upper net chain conveyer belt and the lower net chain conveyer belt are both cleaned by a net chain automatic cleaning device, the automatic cleaning device for the net chain comprises a high-pressure air pump 18, a high-pressure air tank 19 and a high-pressure air nozzle which are sequentially connected through a high-pressure air pipeline 20, the high-pressure gas nozzles include a first high-pressure gas nozzle 21 and a second high-pressure gas nozzle 55 having the same structure, the first high-pressure gas nozzle 21 is arranged between the upper conveying belt and the lower conveying belt of the upper chain conveying belt, the first high-pressure gas nozzle 21 is arranged towards the lower conveying belt of the upper chain conveying belt, the second high-pressure gas nozzles 55 are disposed between the upper and lower conveyor belts of the lower chain conveyor, and the second high-pressure gas nozzles 55 are disposed toward the lower conveyor belt of the lower chain conveyor. The high-pressure air pump 18 and the high-pressure air tank 19 are used as high-pressure air sources and supply high-pressure air to the high-pressure air nozzle, and the high-pressure air nozzle cleans coal slime blocked in the air vent through the high-pressure air. The high-pressure air pump 18 and the high-pressure air tank 19 belong to the prior art, and the detailed structure and the working principle thereof are not described herein.

As shown in fig. 10 and fig. 11-15, each of the first high-pressure gas nozzle 21 and the second high-pressure gas nozzle 55 includes a first cylindrical housing 70, an upper cylinder opening and a lower cylinder opening of the first housing 70 are respectively an airflow inlet and an airflow outlet, the first housing 70 includes an upper cylinder 71 and a lower cylinder 72 which are arranged up and down, an inner diameter of the lower cylinder 72 is larger than an inner diameter of the upper cylinder 71, a first diversion block seat 74 is slidably and sealingly disposed in the upper cylinder 71 of the first housing 70, the first diversion block seat 74 is barrel-shaped, a cylinder opening of the first diversion block seat 74 is arranged toward the upper cylinder opening of the first housing 70, the first diversion block seat 74 includes a second bottom cylinder wall 81 and a second side cylinder wall 84, a first airflow hole 83 is disposed on the second side cylinder wall 84, a first guiding column 79 is connected to an outer side of the second bottom cylinder wall 81, a first diversion support frame 80 is disposed in the lower cylinder 72, the first diversion support frame 80 is provided with a first guide hole 77 corresponding to the first guide post 79, and the first guide post 79 is inserted into the first guide hole 77. The first diversion support frame 80 is provided with a second airflow through hole 76, the second airflow through hole 76 penetrates through the first diversion support frame 80 along the vertical direction, so that the second airflow through hole 76 can conduct the cylinder cavities of the lower cylinder 72, which are respectively positioned above and below the first diversion support frame 80, that is, in the lower cylinder 72, high-pressure gas above the first diversion support frame 80 can flow to the lower part of the first diversion support frame 80 along the second airflow through hole 76. A first spring 75 is connected between the first flow guide plugging seat 74 and the first flow guide support frame 80, a first annular clamping table 82 is fixedly arranged at the lower end of the inner cylinder wall of the upper cylinder body 71, the first flow guide plugging seat 74 is arranged in the first annular clamping table 82 in a sliding and sealing manner (namely, the upper cylinder body 71 is in sliding and sealing with the first flow guide plugging seat 74 through the first annular clamping table 82), a first radial flange 73 is fixedly arranged on the outer side of the barrel mouth of the first flow guide plugging seat 74, a first fixture block 78 is fixedly arranged at the lower end of the first guide column 79, the first fixture block 78 is positioned below the first flow guide support frame 80, and an internal thread for connecting the high-pressure gas pipeline 20 is arranged at the upper end of the inner cylinder wall of the upper cylinder body 71. The end of the high-pressure gas pipeline 20 connected with the high-pressure gas nozzle is provided with an external thread, and the high-pressure gas pipeline 20 is fixedly connected with the high-pressure gas nozzle through a thread.

As shown in fig. 11, when the high-pressure gas nozzle is not supplied with high-pressure gas or the pressure of the high-pressure gas is not enough to compress the first spring 75, the high-pressure gas nozzle is in a blocking state, that is, the first flow guide blocking seat 74 is in the blocking position, at this time, the first flow guide blocking seat 74 separates the high-pressure gas pipeline 20 from the outside, so as to prevent coal ash from entering the high-pressure gas pipeline 20, thereby preventing the high-pressure gas pipeline 20 from being blocked due to the entry of the coal ash. As shown in fig. 12, high pressure gas is introduced into the gas flow inlet of the high pressure gas nozzle, and when the pressure of the high pressure gas reaches a certain degree, the high pressure gas will compress the first spring 75 downwards through the first flow guiding block seat 74 (the high pressure gas acts on the second bottom barrel wall 81 of the first flow guiding block seat 74), and at the same time, the first flow guiding block seat 74 slides downwards along the first annular clamping table 82, and when the first flow guiding block seat slides to a certain position, the first gas flow hole 83 on the second side barrel wall 84 enters into the lower barrel 72, at this time, the first flow guiding block seat 74 is in the conducting position, because the inner diameter of the lower barrel 72 is larger than the inner diameter of the upper barrel 71, when the first flow guiding block seat 74 is in the conducting position, a gap exists between the second side barrel wall 84 and the inner barrel wall of the lower barrel 72, and then the high pressure gas in the barrel cavity of the first flow guiding block seat 74 enters into the gap through the first gas flow hole 83, and then enters the cylinder cavity of the lower cylinder 72 above the first diversion support frame 80 through the gap, then enters the cylinder cavity of the lower cylinder 72 below the first diversion support frame 80 through the second air flow through hole 76, and finally is ejected from the air flow outlet. When cleaning is not needed, the high-pressure gas nozzle is disconnected from high-pressure gas, the compressed first spring 75 is extended and reset, then the first flow guide plugging seat 74 slides upwards along the first annular clamping table 82 until the first gas flow hole 83 in the second side barrel wall 84 enters the barrel cavity of the upper barrel body 71, at the moment, the first flow guide plugging seat 74 is in a plugging position, namely plugging is realized through sliding sealing between the first flow guide plugging seat 74 and the first annular clamping table 82, and as a result, coal ash outside the high-pressure gas nozzle cannot enter the high-pressure gas pipeline 20 through the first flow guide plugging seat 74, so that the high-pressure gas pipeline 20 can be prevented from being plugged by the coal ash.

As shown in fig. 11 and in conjunction with fig. 12-15, when the first diversion blocking seat 74 slides up and down along the first annular clamping platform 82, the first guiding column 79 also slides up and down along the first guiding hole 77 of the first diversion supporting frame 80, and the first guiding column 79 plays a guiding role. When the first guide column 79 slides upwards to a certain position, the first clamping block 78 fixedly arranged at the lower end of the first guide column 79 abuts against the first flow guide supporting frame 80 to prevent the first guide column 79 and the first flow guide plugging seat 74 from continuously sliding upwards, and prevent the first flow guide plugging seat 74 from being separated from the first annular clamping table 82 to cause plugging failure. When the first diversion blocking seat 74 slides downwards along the first annular clamping table 82 to a certain position, the first radial flange 73 abuts against the first annular clamping table 82, and at the moment, the first diversion blocking seat 74 is at the maximum conduction position, namely the first air flow hole 83 completely enters the lower cylinder 72. The first radial flange 73 is designed to abut against the first annular locking platform 82, so as to prevent the high-pressure gas nozzle from being damaged due to the excessive pressure of the high-pressure gas, for example, if the first annular locking platform 82 is not provided when the pressure of the high-pressure gas is excessive, the first diversion blocking seat 74 may completely enter the lower cylinder 72, and incline to be locked in the lower cylinder 72 under the action of the high-pressure gas flow, so that the blocking state cannot be recovered.

As shown in fig. 1, and as shown in fig. 2 and 16, the single-stage multi-effect network chain closed coal slurry drying system of the present invention comprises a first air circulation pipeline 26 and a second air circulation pipeline 29, wherein the first air circulation pipeline 26 and the second air circulation pipeline 29 are connected to the upper air chamber of the drying chamber 6 through a main air pipeline 25, the first air circulation pipeline 26 is connected to a first fan 28, the air from the upper air chamber of the drying chamber 6 in the first air circulation pipeline 26 is heated by a condenser 27 of a first heat pump unit 49 and then returned to the hollow air chamber of the drying chamber 6, the second air circulation pipeline 29 is connected to a second fan 38, a surface air cooler 30 and a heat recoverer 34, the surface air cooler 30 is connected to a cooling tower 32 through a cooling water circulation pipeline 31, the cooling water circulation pipeline 31 is connected to a cooling water circulation pump 33, the air from the upper air chamber of the drying chamber 6 in the second air circulation pipeline 29 sequentially passes through the surface air cooler 30, the surface air recoverer 30, the heat recoverer, After the evaporators 35 and 36 of the heat recovery unit 34 and the first and second heat pump units 49 and 52 are cooled and dehumidified, the air returns to the lower air chamber of the drying chamber 6 after being heated by the heat recovery unit 34 and the condenser 37 of the second heat pump unit 52 in sequence.

As shown in fig. 1, and in conjunction with fig. 2 and 16, the first fan 28 drives air in the first air circulation duct 26 and the second fan 38 drives air in the second air circulation duct 29. The first heat pump unit 49 includes a compressor 51, a condenser 27, an expansion valve 50, and an evaporator 35, which are connected by piping to form a refrigeration loop in which a refrigerant is circulated in a reciprocating manner. The second heat pump unit 52 and the first heat pump unit 49 have the same structure, and the second heat pump unit 52 also includes a compressor 53, a condenser 37, an expansion valve 54, and an evaporator 36. The structures and the operating principles of the first heat pump unit 49 and the second heat pump unit 52 are the prior art, and are not described herein again. In the present embodiment, the evaporator 35 of the first heat pump unit 49 and the evaporator 36 of the second heat pump unit 52 share a single casing. When the air in the first air circulation line 26 from the air chamber above the drying chamber 6 passes through the condenser 27 of the first heat pump unit 49, heat exchange with the refrigerant occurs, that is, the air absorbs heat, the refrigerant releases heat and condenses, and the air after absorbing heat returns to the air chamber above the drying chamber 6. When the air in the second air circulation pipeline 29 from the air chamber on the drying chamber 6 flows through the surface air cooler 30, heat exchange is performed between the air and the cooling water, namely the air releases heat and separates out condensed water, the cooling water absorbs heat, the cooling water after absorbing heat enters the cooling tower 32 along the cooling water circulation pipeline 31 to release heat, the cooling water after releasing heat enters the surface air cooler 30 along the cooling water circulation pipeline 31 to absorb heat, and the operation is repeated in a circulating mode. Cooling water can flow along the cooling water circulation line 31, and the power thereof is derived from the cooling water circulation pump 33. The air in the second air circulation line 29 passes through the surface air cooler 30 and then enters the heat recovery unit 34, the air that exits from the surface air cooler 30 and enters the heat recovery unit 34 is called upstream air, the upstream air is high-temperature humid air, the air that exits from the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52 and enters the heat recovery unit 34 is called downstream air, the downstream air is low-temperature dry air, and when the upstream air enters the heat recovery unit 34, heat exchange is performed between the upstream air and the downstream air, namely, the upstream air releases heat and separates out condensed water, and the downstream air absorbs heat. After the heat is released by the heat recovery device 34, the air in the second air circulation pipeline 29 enters the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52, and exchanges heat with the refrigerants in the first heat pump unit 49 and the second heat pump unit 52, namely, the air releases heat and separates out condensed water, and the refrigerants absorb heat and evaporate. The air in the second air circulation line 29 is discharged from the evaporators 35, 36 of the first heat pump unit 49 and the second heat pump unit 52 and then enters the heat recovery unit 34, the air entering the heat recovery unit 34 is the downstream air, and the downstream air performs heat exchange with the upstream air in the heat recovery unit 34, that is, the downstream air absorbs heat and the upstream air releases heat. After being heated by the heat recovery device 34, the air in the second air circulation pipeline 29 enters the condenser 37 of the second heat pump unit 52, and exchanges heat with the refrigerant of the second heat pump unit 52, that is, the air absorbs heat, and the refrigerant releases heat and condenses. The air in the second air circulation line 29 is heated by the condenser 37 of the second heat pump unit 52 and then returned to the lower air chamber of the drying chamber 6.

The surface cooler 30, the cooling tower 32 and the heat recovery unit 34 are all in the prior art, and the detailed structure and operation thereof will not be described herein.

As shown in fig. 1, and combine fig. 16 to show, the utility model discloses single-stage multiple-effect network chain closed coal slime drying system, wherein surface cooler 30, heat recovery device 34 and first heat pump unit 49's condenser 27 all washs through heat exchanger self-cleaning device, heat exchanger self-cleaning device is including deposiing filtering ponds 40, be equipped with washing circulating pump 41 in the deposiing filtering ponds 40, be connected with on the washing circulating pump 41 and wash the water supply pipe 42, be connected with the washing nozzle on the washing water supply pipe 42, the washing nozzle includes the first washing nozzle 43 that the structure is the same, second washing nozzle 45 and third washing nozzle 47, first washing nozzle 43 is used for wasing surface cooler 30, second washing nozzle 45 is used for wasing heat recovery device 34, third washing nozzle 47 is used for wasing first heat pump unit 49's condenser 27. The heat recovery device 34 is located above the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52, and the bottom of the surface air cooler 30, the bottom of the condenser 27 of the first heat pump unit 49 and the bottoms of the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52 are respectively connected to the precipitation filter tank 40 through a water return pipe 39. The return pipes 39 at the bottoms of the evaporators 35, 36 of the first heat pump unit 49 and the second heat pump unit 52 are provided at the bottom of the common casing of the two evaporators 35, 36, and only one return pipe 39 is required. The utility model provides a wet return 39 is used for two: firstly, when the cleaning nozzle is used for cleaning the surface air cooler 30, the heat recoverer 34 and the condenser 27 of the first heat pump unit 49, the cleaned sewage can flow back to the precipitation filtering pool 40 along the water return pipe 39, and can be continuously recycled after precipitation filtering; secondly, condensed water generated when air flows through the surface air cooler 30, the heat recovery unit 34 and the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52 is recovered, and the heat recovery unit 34 is positioned above the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52, so that the condensed water in the heat recovery unit 34 can flow into a shell shared by the evaporator 35 of the first heat pump unit 49 and the evaporator 36 of the second heat pump unit 52 along the second air circulation pipeline 29, and thus, when the air in the second air circulation pipeline 29 flows through the surface air cooler 30, the heat recovery unit 34 and the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52, the condensed water which releases heat and is separated out can flow into the precipitation filter tank 40 along the water return pipe 39 so as to be recovered and utilized.

As shown in fig. 17 and combined with fig. 18-22, the single-stage multi-effect mesh-chain closed coal slurry drying system of the present invention includes a second casing 85 having a barrel shape, wherein the first cleaning nozzle 43, the second cleaning nozzle 45 and the third cleaning nozzle 47 include a water inlet, the barrel opening of the second casing 85 is a water inlet, the bottom of the second casing 85 is provided with a water outlet 88, the second casing 85 includes an upper barrel 86 and a lower barrel 87 disposed up and down, the inner diameter of the lower barrel 87 is greater than the inner diameter of the upper barrel 86, the upper barrel 86 of the second casing 85 is slidably sealed and provided with a second diversion plug seat 91, the second diversion plug seat 91 has a barrel shape, the barrel opening of the second diversion plug seat 91 is disposed toward the barrel opening of the second casing 85, the second diversion plug seat 91 includes a third bottom barrel wall 98 and a third side barrel wall 89, the third side barrel wall 89 is provided with a first water through hole 90, the outer side of the third bottom barrel wall 98 is connected with a second guide post 95, a second flow guide support frame 96 is arranged in the lower barrel body 87, a second guide hole 93 corresponding to the second guide post 95 is arranged on the second flow guide support frame 96, and the second guide post 95 is inserted in the second guide hole 93. The second diversion support frame 96 is provided with a second water flow through hole 92, the second water flow through hole 92 penetrates through the second diversion support frame 96 along the vertical direction, so that the second water flow through hole 92 can conduct barrel cavities of the lower barrel body 87 which are respectively positioned above and below the second diversion support frame 96, that is, in the lower barrel body 87, water flow above the second diversion support frame 96 can flow to the lower part of the second diversion support frame 96 along the second water flow through hole 92. A second spring 97 is connected between the second diversion plug seat 91 and the second diversion support frame 96, a second annular clamping table 99 is fixedly arranged at the lower end of the inner barrel wall of the upper barrel body 86, the second diversion plug seat 91 is arranged in the second annular clamping table 99 in a sliding and sealing manner (namely, the upper barrel body 86 is in sliding and sealing with the second diversion plug seat 91 through the second annular clamping table 99), a second radial flange 100 is fixedly arranged on the outer side of the barrel mouth of the second diversion plug seat 91, a second fixture block 94 is fixedly arranged at the lower end of the second guide column 95, the second fixture block 94 is positioned below the second diversion support frame 96, and an internal thread for connecting and cleaning the water supply pipe 42 is arranged at the upper end of the inner barrel wall of the upper barrel body 86. The end of the cleaning water supply pipe 42 connected with the cleaning nozzle is provided with an external thread, and the cleaning water supply pipe 42 is fixedly connected with the cleaning nozzle through a thread.

As shown in fig. 18, when the water flow is not introduced into the cleaning nozzle or the pressure of the water flow is not enough to compress the second spring 97, the cleaning nozzle is in a blocking state, that is, the second diversion blocking seat 91 is in the blocking position, at this time, the second diversion blocking seat 91 separates the cleaning water feed pipe 42 from the outside, and prevents the coal ash from entering the cleaning water feed pipe 42, so that the cleaning water feed pipe 42 can be prevented from being blocked due to the entry of the coal ash. As shown in fig. 19, a water flow is introduced into the water inlet of the cleaning nozzle, and when the pressure of the water flow reaches a certain level, the water flow compresses the second spring 97 downward through the second diversion block seat 91 (the water flow acts on the third bottom barrel wall 98 of the second diversion block seat 91), and at the same time, the second diversion block seat 91 slides downward along the second annular locking platform 99, when the second diversion block seat 91 slides to a certain position, the first water flow through hole 90 on the third side barrel wall 89 enters the lower barrel 87, at this time, the second diversion block seat 91 is in the conducting position, because the inner diameter of the lower barrel 87 is larger than the inner diameter of the upper barrel 86, when the second diversion block seat 91 is in the conducting position, a gap exists between the third side barrel wall 89 and the inner barrel wall of the lower barrel 87, so that the water flow in the barrel cavity of the second diversion block seat 91 enters the gap through the first water flow through hole 90 and then enters the barrel cavity of the lower barrel 87 located above the second diversion support 96, then enters the barrel cavity of the lower barrel body 87 below the second diversion support frame 96 through the second water flow through hole 92, and finally is sprayed out from the water flow outlet 88. When not needing to wash, washing nozzle disconnection rivers, the extension of compressed second spring 97 resets, then second water conservancy diversion shutoff seat 91 upwards slides along second annular ka tai 99, enter into the bucket intracavity of upper barrel body 86 until first rivers through-hole 90 on third lateral wall 89, at this moment, second water conservancy diversion shutoff seat 91 is in the shutoff position, that is to say, the shutoff has been realized through the sliding seal between second water conservancy diversion shutoff seat 91 and the second annular ka tai 99, the result is exactly, the outer coal ash of washing nozzle can't enter into through second water conservancy diversion shutoff seat 91 and wash in the water supply pipe 42, thereby can prevent that wash the water supply pipe 42 from being blockked up by the coal ash.

As shown in fig. 18 and 19, when the second diversion blocking seat 91 slides up and down along the second annular clamping table 99, the second guide column 95 also slides up and down along the second guide hole 93 of the second diversion supporting frame 96, and the second guide column 95 plays a role of guiding. When the second guide post 95 slides upwards to a certain position, the second fixture block 94 fixedly arranged at the lower end of the second guide post 95 abuts against the second flow guide support frame 96, so that the second guide post 95 and the second flow guide plugging seat 91 are prevented from continuously sliding upwards, and the second flow guide plugging seat 91 is prevented from being separated from the second annular fixture table 99 to cause plugging failure. When the second diversion sealing seat 91 slides downwards to a certain position along the second annular clamping table 99, the second radial flange 100 abuts against the second annular clamping table 99, and at the moment, the second diversion sealing seat 91 is at the maximum conduction position, namely, the first water flow through hole 90 completely enters the lower barrel 87. The second radial flange 100 is designed to abut against the second annular locking platform 99, so as to prevent the cleaning nozzle from being damaged due to the excessive pressure of the water flow, for example, if the second annular locking platform 99 is not provided when the pressure of the water flow is excessive, the second diversion blocking seat 91 may completely enter the lower barrel 87, and incline and be locked in the lower barrel 87 under the action of the water flow, so that the blocking state cannot be recovered.

As shown in fig. 16, the utility model discloses single-stage multiple-effect net chain closed coal slime drying system, wherein the connection washing nozzle one end that washs feed pipe 42 is connected with first branch feed pipe, second branch feed pipe and third branch feed pipe, first branch feed pipe is connected with first washing nozzle 43, be equipped with first valve 44 on the first branch feed pipe, the second divides the feed pipe to be connected with second washing nozzle 45, be equipped with second valve 46 on the second branch feed pipe, third branch feed pipe is connected with third washing nozzle 47, be equipped with third valve 48 on the third branch feed pipe. The operating state of the cleaning nozzle can be controlled by the opening and closing operation of the valve.

As shown in fig. 2, a double exhaust valve 24 is arranged on the main air pipeline 25, an external circulation air inlet is arranged on the lower air chamber of the drying chamber 6, a double intake valve 13 is arranged at the external circulation air inlet, and a third fan 12 is arranged at the external circulation air inlet in the drying chamber 6. Through the detection of the intelligent detection control system, when the ambient temperature and humidity outside the drying chamber 6 are appropriate, the first fan 28 and the second fan 38 are closed, the dual air inlet valve 13, the dual air outlet valve 24 and the third fan 12 are opened (the centrifugal fan is selected for the third fan 12), and the coal slime is dried by using the outside air.

As shown in fig. 1, the utility model discloses single-stage multiple-effect net chain closed coal slime drying system from the top down is equipped with net chain conveyor 8 and lower net chain conveyor 17 in proper order in drying chamber 6, treat that dry coal slime gets into drying chamber 6 from the feed inlet of drying chamber 6 top, and fall on net chain conveyor 8, along with net chain conveyor 8's rotation, the coal slime is carried to net chain conveyor 17 down by net chain conveyor 8 on, later along with net chain conveyor 17's rotation down again, the coal slime is carried to the discharge gate of drying chamber 6 below by net chain conveyor 17 down again, and be discharged. In the process of conveying the coal slime in the drying chamber 6, the air in the first air circulation pipeline 26 from the drying chamber 6 is heated by the condenser 27 of the first heat pump unit 49 and then returns to the drying chamber 6 for drying the coal slime on the upper chain conveyor 8, and the air in the second air circulation pipeline 29 from the drying chamber 6 is cooled and dehumidified by the surface air cooler 30, the heat recoverer 34 and the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52 in sequence, and then is heated by the heat recoverer 34 and the condenser 37 of the second heat pump unit 52 and then returns to the drying chamber 6 for drying the coal slime on the lower chain conveyor 17 and the upper chain conveyor 8 from bottom to top in sequence. It can be seen that the air coming out of the drying chamber 6 is divided into two paths, one path entering the first air circulation line 26 and returning to the drying chamber 6 through the first air circulation line 26; the other way into the second air circulation line 29 and back to the drying chamber 6 via the second air circulation line 29. To sum up, the utility model discloses area is little, the energy consumption is low, the running cost is low, can realize accurate drying to no flue gas, dust discharge.

The working process of the present invention is described below.

As shown in fig. 1, the coal slurry (water content is 25% -30%) is fed into the broken bridge forming distributor 3 through the iron remover 2 by the feeding conveyor 1, the coal slurry is extruded into uniform particles and then spread at one end of the upper-mesh chain conveyor 8, the upper-mesh chain conveyor 8 rotates, the coal slurry is conveyed to the other end of the upper-mesh chain conveyor 8 and drops at one end of the lower-mesh chain conveyor 17 through the upper dropping port 23, the lower-mesh chain conveyor 17 rotates, the coal slurry is conveyed to the other end of the lower-mesh chain conveyor 17 and drops into the discharging barrel 14 of the discharging port through the lower dropping port 10, the coal slurry enters the spiral discharging machine 15 through the discharging barrel 14, and the dried coal slurry (water content is 10% -15%) is finally discharged through the spiral discharging machine 15. A plurality of material turning devices 22 are arranged above the upper net chain conveyor 8 and the lower net chain conveyor 17 to turn over coal slime particles so as to fully dry the coal slime particles. The coal slime tiling is on last net chain conveyor 8 and lower net chain conveyor 17, a plurality of blow vents that go up have evenly been seted up along length direction on the net chain conveyor of going up, a plurality of blow vents down have evenly been seted up along length direction on the lower net chain conveyor of going up, net chain conveyor 8 and net chain conveyor 17 have the deep bead down all around, the air passes through from the lower blow vent of net chain conveyor belt down and the last blow vent of net chain conveyor of going up, simultaneously with the coal slime contact heat transfer, take away the moisture in the coal slime (dry coal slime promptly), become humid air, discharge from the last air chamber of dry cavity 6, get into air supply device. The wet air entering the air supply device is divided into two paths, one path of wet air enters the first air circulation pipeline 26, is directly heated by the condenser 27 of the first heat pump unit 49 and then is driven by one or more first fans 28 (the first fan 28 adopts an axial flow fan) to return to the hollow air chamber of the drying chamber 6, and the coal slime on the upper net chain conveyor 8 is dried; the other path of wet air enters a second air circulation pipeline 29, is cooled and dehumidified by the surface air cooler 30, the heat recoverer 34 and the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52, is heated by the heat recoverer 34 and the condenser 37 of the second heat pump unit 52, is driven by one or more second fans 38 (centrifugal fans are used as the second fans 38) to return to a lower air chamber of the drying chamber 6, and is used for drying the coal slime on the lower net chain conveyor 17 and the upper net chain conveyor 8 from bottom to top in sequence; finally, the coal slurry is collected and discharged from an upper air chamber of the drying chamber 6 to a main air pipeline 25, and then enters a first air circulation pipeline 26 and a second air circulation pipeline 29 respectively, and the circulation is carried out, so that the coal slurry is dried by closed circulation air.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims (10)

1. The utility model provides a single-stage multiple-effect net chain closed coal slime drying system which characterized in that: comprises a dryer and an air supply device, wherein the dryer comprises a drying chamber, a feed inlet is arranged above the drying chamber, a discharge hole is arranged below the drying chamber, an upper net chain conveyor and a lower net chain conveyor are sequentially arranged in the drying chamber from top to bottom, the air supply device comprises a first heat pump unit, a second heat pump unit, a first air circulation pipeline and a second air circulation pipeline which are respectively connected with the drying chamber, air from the drying chamber in the first air circulation pipeline is heated by a condenser of the first heat pump unit and then returns to the drying chamber for drying the coal slime on the upper net chain conveyor, after the air from the drying chamber in the second air circulation pipeline is cooled and dehumidified by the evaporators of the first heat pump unit and the second heat pump unit, and then the coal slurry is heated by a condenser of the second heat pump unit and then returns to the drying chamber to be used for drying the coal slurry on the lower net chain conveyor and the upper net chain conveyor from bottom to top in sequence.

2. The single-stage multi-effect net-linked closed coal slime drying system of claim 1, wherein: the upper net chain conveyor comprises an upper driving chain wheel, an upper driven chain wheel and an upper net chain conveying belt, the upper driving chain wheel and the upper driven chain wheel are rotatably arranged in the drying chamber, the upper net chain conveying belt is sleeved on the upper driving chain wheel and the upper driven chain wheel, a plurality of upper air vents are formed in the upper net chain conveying belt along the length direction, the upper driving chain wheel is driven by an upper motor, the lower net chain conveyor comprises a lower driving chain wheel, a lower driven chain wheel and a lower net chain conveying belt, the lower driving chain wheel and the lower driven chain wheel are rotatably arranged in the drying chamber, the lower net chain conveying belt is sleeved on the lower driving chain wheel and the lower driven chain wheel, a plurality of lower air vents are formed in the lower net chain conveying belt along the length direction, the lower driving chain wheel is driven by a lower motor, and material turnover devices are respectively arranged above the upper net chain conveying belt and the lower net chain conveying belt, the material turnover device comprises a rotating shaft which is rotatably arranged on the drying chamber, a plurality of turnover plates which are radially arranged are arranged on the rotating shaft, and the rotating shaft is driven by a turnover motor.

3. The single-stage multi-effect mesh-linked closed coal slurry drying system of claim 2, characterized in that: the upper net chain conveyor and the lower net chain conveyor divide the drying chamber into an upper air chamber, a hollow air chamber and a lower air chamber from top to bottom, an upper wind shield is arranged around the upper net chain conveyor, the upper wind shield is connected between the upper net chain conveyor and the drying chamber, a lower wind shield is arranged around the lower net chain conveyor, the lower wind shield is connected between the lower net chain conveyor and the drying chamber, the drying chamber at one end of the upper net chain conveyor is provided with the feed inlet, the upper wind shield at the other end of the upper net chain conveyor is provided with an upper blanking port, one end of the lower net chain conveyor is positioned below the upper blanking port, the lower wind shield at the other end of the lower net chain conveyor is provided with a lower blanking port, the discharge port is arranged on the drying chamber below the lower blanking port, one end of the first air circulation pipeline is connected to the upper air chamber of the drying chamber, the other end of the first air circulation pipeline is connected to the hollow air chamber of the drying chamber, one end of the second air circulation pipeline is connected to the upper air chamber of the drying chamber, and the other end of the second air circulation pipeline is connected to the lower air chamber of the drying chamber.

4. The single-stage multi-effect mesh-linked closed coal slime drying system of claim 3, wherein: a bridge breaking forming distributing machine is arranged at the feed inlet of the drying chamber, a bridge breaking device and an extrusion forming distributing device are sequentially arranged in the bridge breaking forming distributing machine from top to bottom, a feeding conveyor is arranged above the bridge-breaking forming distributor, the feeding conveyor comprises a feeding driving wheel, a feeding driven wheel and a feeding conveying belt, the feeding conveyer belt is sleeved on the feeding driving wheel and the feeding driven wheel, the feeding driving wheel is driven by the feeding motor, the two ends of the feeding conveyor are respectively a feeding end and a blanking end, the blanking end is positioned right above the bridge-breaking forming distributor, an iron remover is arranged above the feeding conveyor, a discharging barrel is arranged at the discharging port of the drying chamber, the upper port of ejection of compact section of thick bamboo is located the below of blanking mouth, the below of ejection of compact section of thick bamboo is equipped with the spiral discharge machine, the import of spiral discharge machine is located the below of ejection of compact section of thick bamboo lower port.

5. The single-stage multi-effect mesh-linked closed coal slime drying system of claim 4, wherein: the inner bottom of the drying cavity is provided with a scraper type automatic ash removing device, the scraper type automatic ash removing device comprises a scraper, an ash removing driving chain wheel, an ash removing driven chain wheel and a chain, the ash removing driving chain wheel and the ash removing driven chain wheel are respectively rotatably arranged at two ends of the inner bottom of the drying cavity, the chain is sleeved on the ash removing driving chain wheel and the ash removing driven chain wheel, the ash removing driving chain wheel is driven by an ash removing motor, the scraper is connected to the chain, an ash outlet corresponding to the scraper is arranged on the discharge barrel, the scraper comprises a socket piece and a connector piece, the socket piece is of a triangular barrel-shaped structure, the barrel walls of the socket piece are a first bottom barrel wall and two first side barrel walls which are connected with each other, two chutes which are arranged along the length direction of the socket piece are arranged on the first bottom barrel wall, the connector piece is of a triangular columnar structure, and the external shape of the connector piece is matched with the barrel cavity shape of the socket piece, the utility model discloses a socket joint spare, including the socket joint spare, the periphery wall of plug connector is interconnect's outer diapire and two lateral walls, be equipped with two sliders on the outer diapire of plug connector, the plug connector insert in the bucket intracavity of socket joint spare, two the slider is located two spouts respectively, be equipped with a plurality of elastic bulge on two lateral walls of plug connector respectively, every the length direction of plug connector is all followed to a plurality of elastic bulge on the lateral wall arranges, be equipped with on the inner barrel wall of socket joint spare with elastic bulge assorted recess, the one end of chain is connected on a first lateral wall of socket joint spare and a lateral wall of plug connector, the other end of chain is connected on another first lateral wall of socket joint spare and another lateral wall of plug connector.

6. The single-stage multi-effect mesh-linked closed coal slime drying system of claim 5, wherein: the upper net chain conveying belt and the lower net chain conveying belt are cleaned through a net chain automatic cleaning device, the net chain automatic cleaning device comprises a high-pressure air pump, a high-pressure air tank and a high-pressure air nozzle which are sequentially connected through a high-pressure air pipeline, the high-pressure air nozzle comprises a first high-pressure air nozzle and a second high-pressure air nozzle which are identical in structure, the first high-pressure air nozzle is arranged between the upper conveying belt and the lower conveying belt of the upper net chain conveying belt, the first high-pressure air nozzle faces the lower conveying belt of the upper net chain conveying belt, the second high-pressure air nozzle is arranged between the upper conveying belt and the lower conveying belt of the lower net chain conveying belt, the second high-pressure air nozzle faces the lower conveying belt of the lower net chain conveying belt, the first high-pressure air nozzle and the second high-pressure air nozzle both comprise first tubular bodies, and the upper and lower barrel openings of the first tubular bodies are respectively provided with an air flow inlet and an air flow outlet, the first shell comprises an upper cylinder body and a lower cylinder body which are arranged up and down, the inner diameter of the lower cylinder body is larger than that of the upper cylinder body, a first flow guide plugging seat is arranged in the upper cylinder body of the first shell body in a sliding and sealing mode and is in a barrel shape, a barrel opening of the first flow guide plugging seat faces the upper barrel opening of the first shell body, the first flow guide plugging seat comprises a second bottom barrel wall and a second side barrel wall, a first air circulation hole is formed in the second side barrel wall, a first guide column is connected to the outer side of the second bottom barrel wall, a first flow guide supporting frame is arranged in the lower cylinder body, a first guide hole corresponding to the first guide column is formed in the first flow guide supporting frame, the first guide column is inserted into the first guide hole, a second air flow hole is formed in the first flow guide supporting frame, and the second air flow hole penetrates through the first flow guide supporting frame in the up and down direction, the first guide plugging seat is connected with a first spring between the first guide plugging seat and the first guide supporting frame, a first annular clamping table is fixedly arranged at the lower end of the inner cylinder wall of the upper cylinder body, the first guide plugging seat is arranged in the first annular clamping table in a sliding sealing manner, a first radial flange is fixedly arranged on the outer side of a barrel opening of the first guide plugging seat, a first clamping block is fixedly arranged at the lower end of the first guide column, the first clamping block is positioned below the first guide supporting frame, and an internal thread used for connecting a high-pressure gas pipeline is arranged at the upper end of the inner cylinder wall of the upper cylinder body.

7. The single-stage multi-effect mesh-linked closed coal slime drying system of claim 6, wherein: one end of the first air circulation pipeline and one end of the second air circulation pipeline are both connected with an upper air chamber of the drying chamber through a main air pipeline, the first air circulation pipeline is connected with a first fan, air in the first air circulation pipeline from an air chamber on the drying chamber is heated by a condenser of the first heat pump unit and then returns to the air chamber of the drying chamber, the second air circulation pipeline is connected with a second fan, a surface cooler and a heat recoverer, the surface cooler is connected with a cooling tower through a cooling water circulation pipeline, the cooling water circulation pipeline is connected with a cooling water circulation pump, air in the second air circulation pipeline from an air chamber on the drying chamber is cooled and dehumidified by the surface air cooler, the heat recoverer and the evaporators of the first heat pump unit and the second heat pump unit in sequence, and then the air returns to the lower air chamber of the drying chamber after being heated by the heat recoverer and the condenser of the second heat pump unit in sequence.

8. The single-stage multi-effect mesh-linked closed coal slime drying system of claim 7, wherein: the surface air cooler, the heat recoverer and the condenser of the first heat pump unit are all cleaned by the automatic cleaning device of the heat exchanger, the automatic cleaning device of the heat exchanger comprises a sedimentation filter tank, a cleaning circulating pump is arranged in the sedimentation filter tank, the cleaning circulating pump is connected with a cleaning water supply pipe which is connected with a cleaning nozzle, the cleaning nozzles comprise a first cleaning nozzle, a second cleaning nozzle and a third cleaning nozzle which have the same structure, the first cleaning nozzle is used for cleaning the surface cooler, the second cleaning nozzle is used for cleaning the heat recoverer, the third cleaning nozzle is used for cleaning a condenser of the first heat pump unit, the heat recovery device is positioned above evaporators of the first heat pump unit and the second heat pump unit, the bottom of the surface air cooler, the bottom of the condenser of the first heat pump unit and the bottoms of the evaporators of the first heat pump unit and the second heat pump unit are respectively connected to the precipitation filter tank through water return pipes.

9. The single-stage multi-effect mesh-linked closed coal slurry drying system of claim 8, characterized in that: the first cleaning nozzle, the second cleaning nozzle and the third cleaning nozzle all comprise a barrel-shaped second shell, a barrel opening of the second shell is a water flow inlet, a water flow outlet is arranged at the barrel bottom of the second shell, the second shell comprises an upper barrel body and a lower barrel body which are arranged from top to bottom, the inner diameter of the lower barrel body is larger than that of the upper barrel body, a second flow guide plugging seat is arranged in the upper barrel body of the second shell in a sliding sealing manner and is barrel-shaped, the barrel opening of the second flow guide plugging seat is arranged towards the barrel opening of the second shell, the second flow guide plugging seat comprises a third bottom barrel wall and a third side barrel wall, a first water flow through hole is formed in the third side barrel wall, a second guide column is connected to the outer side of the third bottom barrel wall, a second flow guide support frame is arranged in the lower barrel body, and a second guide hole corresponding to the second guide column is formed in the second flow guide support frame, the second guide post is inserted into the second guide hole in an penetrating manner, a second water flow through hole is formed in the second flow guide support frame, the second water flow through hole penetrates through the second flow guide support frame in the vertical direction, a second spring is connected between the second flow guide plugging seat and the second flow guide support frame, a second annular clamping table is fixedly arranged at the lower end of the inner barrel wall of the upper barrel body, the second flow guide plugging seat is arranged in the second annular clamping table in a sliding and sealing manner, a second radial flange is fixedly arranged on the outer side of a barrel opening of the second flow guide plugging seat, a second clamping block is fixedly arranged at the lower end of the second guide post, the second clamping block is located below the second flow guide support frame, and an internal thread used for connecting and cleaning a water supply pipe is arranged at the upper end of the inner barrel wall of the upper barrel body.

10. The single-stage multi-effect mesh-linked closed coal slurry drying system of claim 9, characterized in that: wash the connection washing nozzle one end of feed pipe and be connected with first branch feed pipe, second branch feed pipe and third branch feed pipe, first branch feed pipe is connected with first washing nozzle, be equipped with first valve on the first branch feed pipe, the second divides the feed pipe to be connected with second washing nozzle, be equipped with the second valve on the second branch feed pipe, third branch feed pipe is connected with third washing nozzle, be equipped with the third valve on the third branch feed pipe, be equipped with dual discharge valve on the main air pipeline, the extrinsic cycle air intake has been seted up to the lower air chamber of dry chamber, extrinsic cycle air intake department is equipped with dual admission valve, extrinsic cycle air intake department in the dry chamber is equipped with the third fan.

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