CN214665851U

CN214665851U - Air supply system for single-stage coal slime drying

Info

Publication number: CN214665851U
Application number: CN202023329657.2U
Authority: CN
Inventors: 宋世果; 张立忠; 张峰; 黄伟; 刘戈; 杨惠茹; 赵廷江; 马鑫
Original assignee: Beijing Zhongkuang Boneng Energy Saving Science & Technology Co ltd
Current assignee: Beijing Zhongkuang Boneng Energy Saving Science & Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-11-09
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a single-stage coal slime is air feed system for drying, it includes first heat pump set, second heat pump set and first air cycle pipeline and second air cycle pipeline be connected with the dry cavity of coal slime desiccator respectively, return the coal slime that dry cavity is used for dry cavity upper portion after the air that comes from dry cavity in the first air cycle pipeline heats through the condenser of first heat pump set, the air that comes from dry cavity in the second air cycle pipeline returns dry cavity and is used for the coal slime on dry cavity lower part and upper portion in proper order from the bottom up after the evaporimeter cooling dehumidification of first heat pump set and second heat pump set earlier, returns dry cavity after the condenser heating of second heat pump set again. Its purpose is in order to provide a single-stage coal slime air feed system for drying, its simple structure to the energy consumption is lower.

Description

Air supply system for single-stage coal slime drying

Technical Field

The utility model relates to a dry field of coal slime especially relates to a dry air feed system that uses of single-stage coal slime.

Background

In the dry field of coal slime, the coal slime desiccator can be used usually, and the coal slime desiccator includes dry cavity, is equipped with feed inlet and discharge gate on the dry cavity, is equipped with the net chain conveyer in the dry cavity, and the net chain conveyer carries the coal slime to the discharge gate from the feed inlet, and in the coal slime transportation process, let in the air (have the uniform temperature) through air supply system in to dry cavity, the air is used for drying the coal slime on the net chain conveyer. However, the existing air supply system is complex in structure and high in energy consumption.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a dry air feed system that uses of single-stage coal slime, its simple structure to the energy consumption is lower.

The utility model discloses single-stage coal slime is air feed system for drying, including first heat pump set, second heat pump set and first air cycle pipeline and second air cycle pipeline be connected with the dry cavity of coal slime desiccator respectively, the air that comes from dry cavity in the first air cycle pipeline returns the coal slime that dry cavity is used for dry cavity upper portion 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 the coal slime on dry cavity lower part and upper portion from the bottom up in proper order 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.

The utility model discloses single-stage coal slime is air feed system for drying, wherein the one end of first air circulation pipeline is connected in the upper portion of drying chamber, the other end of first air circulation pipeline is connected in the middle part of drying chamber, the one end of second air circulation pipeline is connected in the upper portion of drying chamber, the other end of second air circulation pipeline is connected in the lower part of drying chamber.

The utility model discloses single-stage coal slime is air feed system for drying, wherein the one end of first air circulation pipeline and the one end of second air circulation pipeline all connect in the upper portion of drying chamber through main air pipeline, be connected with first fan on the first air circulation pipeline, the air that comes from drying chamber upper portion in the first air circulation pipeline returns the middle part 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 drying chamber upper portion in the second air circulation pipeline cools down after dehumidifying through surface cooler, heat recovery device and the evaporimeter of first heat pump set and second heat pump set in proper order, and then returns to the lower part 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 dry air feed system of using of single-stage coal slime, 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, heat 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 are respectively through heat pump set and second heat pump set's evaporimeter bottom The water return pipe is connected to the sedimentation filtering tank.

The utility model discloses an air supply system for single-stage coal slime drying, wherein first washing nozzle, second washing nozzle and third washing nozzle all include the casing that is the tubbiness, the bung hole of casing is the rivers import, the barrel bottom of casing is equipped with the rivers export, the 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 water conservancy diversion shutoff seat in the upper barrel body of casing, water conservancy diversion shutoff seat is the tubbiness, the bung hole of water conservancy diversion shutoff seat is arranged towards the bung hole of casing, water conservancy diversion shutoff seat includes bottom wall and side bucket wall, seted up first rivers through-hole on the side bucket wall, the outside of bottom wall is connected with the guide post, be equipped with the water conservancy diversion support frame in the lower barrel body, be equipped with on the water conservancy diversion support frame with the guiding hole that corresponds with the guide post, the guide post alternates in the guiding hole, the water supply device is characterized in that a second water flow through hole is formed in the flow guide support frame, the second water flow through hole penetrates through the flow guide support frame in the up-down direction, a spring is connected between the flow guide plugging seat and the flow guide support frame, an annular clamping table is fixedly arranged at the lower end of the inner barrel wall of the upper barrel body, the flow guide plugging seat is arranged in the annular clamping table in a sliding sealing mode, a radial flange is fixedly arranged on the outer side of a barrel opening of the flow guide plugging seat, a clamping block is fixedly arranged at the lower end of the guide post, the clamping block is located below the 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.

The utility model discloses single-stage coal slime is air feed system for drying, wherein the connection that washs the feed pipe washs nozzle one end and 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, the second divides to be equipped with the second valve on the feed pipe, the third branch feed pipe is connected with third washing nozzle, be equipped with the third valve on the third branch feed pipe.

The utility model discloses single-stage coal slime is air supply system for drying when using, the air that comes from the drying cavity in the first air circulation pipeline returns the coal slime that the drying cavity is used for dry drying cavity upper portion after the condenser heating of first heat pump set, the air that comes from the drying cavity in the second air circulation pipeline is earlier after the evaporimeter cooling dehumidification of first heat pump set and second heat pump set, it is used for the coal slime on from the bottom up drying cavity lower part and upper portion in proper order to return the drying cavity after the condenser heating of second heat pump set again. 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 simple structure to the energy consumption is lower.

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

Drawings

FIG. 1 is a diagram showing the operation state of the air supply system for single-stage coal slime drying of the present invention;

FIG. 2 is a schematic structural view of the air supply system for single-stage coal slime drying of the present invention;

FIG. 3 is a front view of the cleaning nozzle of the present invention;

fig. 4 is a front sectional view of the cleaning nozzle of the present invention (the diversion plug seat is in the plugging position);

fig. 5 is a front sectional view of the cleaning nozzle of the present invention (the diversion plug seat is in the conducting position);

fig. 6 is a front view of the middle diversion plugging seat of the present invention;

fig. 7 is a top view of the middle diversion plug seat of the present invention;

fig. 8 is a top view of the middle diversion support frame of the present invention.

Detailed Description

As shown in figure 1, use the utility model discloses a coal slime 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 network chain conveyor 8 and lower network chain conveyor 17 in proper order in drying chamber 6.

As shown in fig. 2 and fig. 1, the air supply system for single-stage coal slurry drying of the present invention comprises a first heat pump unit 49, a second heat pump unit 52, and a first air circulation pipeline 26 and a second air circulation pipeline 29 respectively connected to the drying chamber 6 of the coal slurry drying machine, the air from the drying chamber 6 in the first air circulation pipeline 26 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 part of the drying chamber 6 (namely the coal slime on the upper part of the upper-net chain conveyor 8), the air from the drying chamber 6 in the second air circulation pipeline 29 is cooled and dehumidified by the evaporators 35 and 36 of the first heat pump unit 49 and the second heat pump unit 52, and then the coal slurry is heated by a condenser 37 of the second heat pump unit 52 and then returns to the drying chamber 6 to be used for drying the coal slurry at the lower part and the upper part of the drying chamber 6 (namely the coal slurry 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, the upper net chain conveyor 8 includes an upper driving sprocket, an upper driven sprocket and an upper net chain conveyor belt, the upper driving sprocket and the upper driven sprocket are rotatably mounted in the drying chamber 6, the upper net chain conveyor belt is sleeved on the upper driving sprocket and the upper driven sprocket, a plurality of upper vent holes are formed in the upper net chain conveyor belt along the length direction, the upper driving sprocket is driven by an upper motor, the lower net chain conveyor 17 includes a lower driving sprocket, a lower driven sprocket and a lower net chain conveyor belt, the lower driving sprocket and the lower driven sprocket are rotatably mounted in the drying chamber 6, the lower net chain conveyor belt is sleeved on the lower driving sprocket and the lower driven sprocket, a plurality of lower vent holes are formed in the lower net chain conveyor belt along the length direction, and the lower driving sprocket 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, the upper and lower wire conveyors 8 and 17 divide the drying chamber 6 into an upper air chamber, a hollow air chamber and a lower air chamber from top to bottom, the periphery of the upper net chain conveyor 8 is provided with an upper wind shield 7, the upper wind shield 7 is connected between the upper net chain conveyor 8 and the drying chamber 6, the periphery of the lower net chain conveyor 17 is provided with lower wind baffles 9, the lower wind baffles 9 are connected between the lower net chain conveyor 17 and the drying chamber 6, the drying chamber 6 at one end of the upper net chain conveyor 8 is provided with the feeding hole, the upper wind shield 7 at the other end of the upper net chain conveyor 8 is provided with an upper blanking hole 23, one end of the lower mesh chain conveyor 17 is located below the upper blanking port 23, the lower blanking port 10 is arranged on the lower wind shield 9 at the other end of the lower mesh chain conveyor 17, and the discharging port is arranged on the drying chamber 6 below the blanking port 10.

As shown in fig. 1, one end of the first air circulation line 26 is connected to an upper portion (i.e., an upper air chamber) of the drying chamber 6, the other end of the first air circulation line 26 is connected to a middle portion (i.e., a hollow air chamber) of the drying chamber 6, one end of the second air circulation line 29 is connected to an upper portion (i.e., an upper air chamber) of the drying chamber 6, and the other end of the second air circulation line 29 is connected to a lower portion (i.e., a lower air chamber) of the 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, the upper blanking opening 23 and the lower blanking opening 10 are respectively provided with a baffle 11, and the baffle 11 is used for guiding the coal slurry to fall down.

As shown in fig. 1, a bridge breaking forming distributing machine 3 is arranged at a feed inlet of the drying chamber 6, a bridge breaking device 5 and an extrusion forming distributing device 4 are sequentially arranged in the bridge breaking forming distributing machine 3 from top to bottom, and it should be noted that the bridge breaking forming distributing machine 3 belongs to the prior art, and specific structures and working principles thereof are not described herein again. 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, the interior bottom of drying chamber 6 is equipped with scrapes automatic ash removal device of board formula, scrape automatic ash removal device of board formula and include scraper blade 16, deashing drive sprocket, deashing driven sprocket and chain, deashing drive sprocket and deashing driven sprocket rotate the both ends of locating the interior bottom of drying chamber 6 respectively, the chain suit is on deashing drive sprocket and deashing driven sprocket, the deashing drive sprocket passes through the deashing motor drive, scraper blade 16 connect in on the chain, be equipped with the ash outlet 56 corresponding with scraper blade 16 on the play feed cylinder 14. When deashing motor drive deashing drive sprocket rotated, the deashing drive sprocket drove the chain and the deashing driven sprocket rotates together, because scraper blade 16 connects on the chain, consequently when the chain rotated around deashing owner, driven sprocket, the chain can drive scraper blade 16 at the deashing owner, back and forth movement between driven sprocket to scrape the ash operation. 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. 1, the upper and lower net chain conveyer belts are all cleaned by the net chain automatic cleaning device, the net chain automatic cleaning device 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 air nozzle comprises a first high-pressure air nozzle 21 and a second high-pressure air nozzle 55 which are the same in structure, the first high-pressure air nozzle 21 is arranged between the upper and lower conveyer belts of the upper net chain conveyer belt, the first high-pressure air nozzle 21 is arranged towards the lower conveyer belt of the upper net chain conveyer belt, the second high-pressure air nozzle 55 is arranged between the upper and lower conveyer belts of the lower net chain conveyer belt, and the second high-pressure air nozzle 55 is arranged towards the lower conveyer belt of the lower net chain conveyer belt. 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. 1 and fig. 2, one end of a first air circulation line 26 and one end of a second air circulation line 29 are connected to an upper portion (i.e., an upper air chamber) of the drying chamber 6 through a main air line 25, the first air circulation line 26 is connected to a first fan 28, air from the upper portion (i.e., the upper air chamber) of the drying chamber 6 in the first air circulation line 26 is heated by a condenser 27 of a first heat pump unit 49 and then returns to a middle portion (i.e., the hollow air chamber) of the drying chamber 6, the second air circulation line 29 is connected to a second fan 38, a surface cooler 30 and a heat recoverer 34, the surface cooler 30 is connected to a cooling tower 32 through a cooling water circulation line 31, the cooling water circulation line 31 is connected to a cooling water circulation pump 33, and air from the upper portion (i.e., the upper air chamber) of the drying chamber 6 in the second air circulation line 29 sequentially passes through the surface cooler 30, 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, and then are heated by the heat recovery unit 34 and the condenser 37 of the second heat pump unit 52 in sequence and then return to the lower part (i.e., the lower air chamber) of the drying chamber 6.

As shown in fig. 1 in conjunction with fig. 2, a first fan 28 drives air in the first air circulation duct 26 and a 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 in combination with fig. 2-8, the surface air cooler 30, the heat recovery unit 34 and the condenser 27 of the first heat pump unit 49 are all cleaned by a heat exchanger automatic cleaning device, the heat exchanger automatic cleaning device includes a precipitation filtering tank 40, a cleaning circulating pump 41 is arranged in the precipitation filtering tank 40, a cleaning water supply pipe 42 is connected to the cleaning circulating pump 41, a cleaning nozzle is connected to the cleaning water supply pipe 42, the cleaning nozzle includes a first cleaning nozzle 43, a second cleaning nozzle 45 and a third cleaning nozzle 47 which are identical in structure, the first cleaning nozzle 43 is used for cleaning the surface air cooler 30, the second cleaning nozzle 45 is used for cleaning the heat recovery unit 34, and the third cleaning nozzle 47 is used for cleaning the condenser 27 of the first heat pump unit 49. 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. 3 and with reference to fig. 4-8, each of the first cleaning nozzle 43, the second cleaning nozzle 45 and the third cleaning nozzle 47 includes a barrel-shaped housing 85, a barrel opening of the housing 85 is a water inlet, a water outlet 88 is disposed at a barrel bottom of the housing 85, the housing 85 includes an upper barrel body 86 and a lower barrel body 87 which are disposed up and down, an inner diameter of the lower barrel body 87 is larger than an inner diameter of the upper barrel body 86, a diversion plug seat 91 is slidably and sealingly disposed in the upper barrel body 86 of the housing 85, the diversion plug seat 91 is barrel-shaped, a barrel opening of the diversion plug seat 91 is disposed toward the barrel opening of the housing 85, the diversion plug seat 91 includes a bottom barrel wall 98 and a side barrel wall 89, a first water flow through hole 90 is disposed on the side barrel wall 89, a guide column 95 is connected to an outer side of the bottom barrel wall 98, a diversion support frame 96 is disposed in the lower barrel body 87, a guide hole 93 corresponding to the guide column 95 is disposed on the diversion support frame 96, the guide posts 95 are inserted into the guide holes 93. The second water flow through holes 92 are formed in the diversion support frame 96, the second water flow through holes 92 penetrate through the diversion support frame 96 along the vertical direction, and therefore the second water flow through holes 92 can conduct barrel cavities, located above and below the diversion support frame 96, of the lower barrel 87, namely, in the lower barrel 87, water flow above the diversion support frame 96 can flow to the lower portion of the diversion support frame 96 along the second water flow through holes 92. A spring 97 is connected between the diversion plug seat 91 and the diversion support frame 96, an annular clamping table 99 is fixedly arranged at the lower end of the inner barrel wall of the upper barrel body 86, the diversion plug seat 91 is arranged in the annular clamping table 99 in a sliding sealing manner (namely, the upper barrel body 86 is in sliding sealing with the diversion plug seat 91 through the annular clamping table 99), a radial flange 100 is fixedly arranged on the outer side of the barrel mouth of the diversion plug seat 91, a fixture block 94 is fixedly arranged at the lower end of the guide post 95, the fixture block 94 is positioned below the 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. 4, when the water flow is not introduced into the cleaning nozzle or the pressure of the water flow is not enough to compress the spring 97, the cleaning nozzle is in a blocking state, that is, the diversion blocking seat 91 is in the blocking position, at this time, the diversion blocking seat 91 separates the cleaning water supply pipe 42 from the outside, and prevents the coal ash from entering the cleaning water supply pipe 42, so that the cleaning water supply pipe 42 can be prevented from being blocked due to the entry of the coal ash. As shown in fig. 5, water flows 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 spring 97 downwards through the diversion blocking seat 91 (the water flow acts on the upper portion of the bottom barrel wall 98 of the diversion blocking seat 91), and the diversion blocking seat 91 slides downwards along the annular clamping table 99, when the diversion blocking seat 91 slides to a certain position, the first water through hole 90 on the side barrel wall 89 enters the lower barrel body 87, at this time, the diversion blocking seat 91 is in the conducting position, because the inner diameter of the lower barrel body 87 is larger than that of the upper barrel body 86, when the diversion blocking seat 91 is in the conducting position, a gap exists between the side barrel wall 89 and the inner barrel wall of the lower barrel body 87, so that the water flow in the barrel cavity of the diversion blocking seat 91 enters the gap through the first water through hole 90 and then enters the barrel cavity of the lower barrel body 87 above the diversion supporting frame 96 through the gap, then enters the barrel cavity of the lower barrel body 87 below the diversion support frame 96 through the second water flow through hole 92, and finally is sprayed out from the water flow outlet 88. When cleaning is not needed, water flow is cut off by the cleaning nozzle, the compressed spring 97 is extended to reset, then the flow guide plugging seat 91 slides upwards along the annular clamping table 99 until the first water flow through hole 90 on the side barrel wall 89 enters the barrel cavity of the upper barrel body 86, at the moment, the flow guide plugging seat 91 is in a plugging position, namely, plugging is realized through sliding sealing between the flow guide plugging seat 91 and the annular clamping table 99, and as a result, coal ash outside the cleaning nozzle cannot enter the cleaning water supply pipe 42 through the flow guide plugging seat 91, so that the cleaning water supply pipe 42 can be prevented from being plugged by the coal ash.

As shown in fig. 4 and 5, when the diversion plug seat 91 slides up and down along the annular clamping table 99, the guide post 95 also slides up and down along the guide hole 93 of the diversion support frame 96, and the guide post 95 plays a role of guiding. When the guide post 95 slides upwards to a certain position, the fixture block 94 fixedly arranged at the lower end of the guide post 95 abuts against the flow guide support frame 96 to prevent the guide post 95 and the flow guide plugging seat 91 from continuously sliding upwards, so that the plugging failure caused by the separation of the flow guide plugging seat 91 and the annular clamping table 99 is prevented. When the diversion plug seat 91 slides downwards to a certain position along the annular clamping table 99, the radial flange 100 abuts against the annular clamping table 99, and at the moment, the diversion plug seat 91 is at the maximum conduction position, namely the first water flow through hole 90 completely enters the lower barrel 87. The radial flange 100 is designed to abut against the 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 annular locking platform 99 is not provided when the pressure of the water flow is too high, the 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. 1, and as shown in fig. 2, one end of the cleaning nozzle connected to the cleaning water supply pipe 42 is connected to a first sub water supply pipe, a second sub water supply pipe and a third sub water supply pipe, the first sub water supply pipe is connected to the first cleaning nozzle 43, the first sub water supply pipe is provided with a first valve 44, the second sub water supply pipe is connected to the second cleaning nozzle 45, the second sub water supply pipe is provided with a second valve 46, the third sub water supply pipe is connected to the third cleaning nozzle 47, and the third sub water supply pipe is provided with a third valve 48. The operating state of the cleaning nozzle can be controlled by the opening and closing operation of the valve.

As shown in fig. 1, 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 coal slime is air supply system for drying when using, 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 drying chamber 6 upper portion 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 through surface cooler 30 in proper order, the evaporimeter 35 of heat recovery unit 34 and first heat pump set 49 and second heat pump set 52, 36 cooling dehumidification back, return drying chamber 6 and be used for the coal slime on drying chamber 6 lower part and upper portion in proper order from the bottom up after the condenser 37 heating of heat recovery unit 34 and second heat pump set 52 again. 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 simple structure to the energy consumption is lower.

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 the utility model discloses dry air supply system of using of single-stage coal slime. The wet air entering the air supply system 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

1. The utility model provides a single-stage coal slime is air feed system for drying which characterized in that: including first heat pump set, second heat pump set and first air cycle pipeline and second air cycle pipeline connected with the drying chamber of coal slime desiccator respectively, the air that comes from the drying chamber in the first air cycle pipeline returns the coal slime that drying chamber is used for dry drying chamber upper portion after the condenser heating of first heat pump set, the air that comes from the drying chamber in the second air cycle pipeline earlier through the evaporimeter cooling dehumidification back of first heat pump set and second heat pump set, returns the drying chamber after the condenser heating of second heat pump set again and is used for from the bottom up coal slime dry drying chamber lower part and upper portion in proper order.

2. The air supply system for single-stage coal slime drying according to claim 1, characterized in that: one end of the first air circulation pipeline is connected to the upper part of the drying chamber, the other end of the first air circulation pipeline is connected to the middle part of the drying chamber, one end of the second air circulation pipeline is connected to the upper part of the drying chamber, and the other end of the second air circulation pipeline is connected to the lower part of the drying chamber.

3. The air supply system for single-stage coal slime drying according to claim 2, characterized in that: one end of the first air circulation pipeline and one end of the second air circulation pipeline are both connected with the upper part of the drying chamber through a main air pipeline, the first air circulation pipeline is connected with a first fan, air from the upper part of 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 middle part 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 from the upper part of the drying chamber in the second air circulation pipeline 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 returns to the lower part of the drying chamber after being heated by the heat recoverer and the condenser of the second heat pump unit in sequence.

4. The air supply system for single-stage coal slime drying according to claim 3, characterized in that: 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.

5. The air supply system for single-stage coal slime drying according to claim 4, characterized in that: the first cleaning nozzle, the second cleaning nozzle and the third cleaning nozzle all comprise barrel-shaped shells, the barrel openings of the shells are water inlets, the barrel bottoms of the shells are provided with water outlets, the shells comprise 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, the upper barrel body of the shells is internally provided with a flow guide plugging seat in a sliding sealing manner, the flow guide plugging seat is barrel-shaped, the barrel openings of the flow guide plugging seat are arranged towards the barrel openings of the shells, the flow guide plugging seat comprises a bottom barrel wall and a side barrel wall, the side barrel wall is provided with a first water flow through hole, the outer side of the bottom barrel wall is connected with a guide post, a flow guide support frame is arranged in the lower barrel body, the flow guide support frame is provided with a guide hole corresponding to the guide post, the guide post is inserted in the guide hole, and the flow guide support frame is provided with a second water flow through hole, the second water flow through hole penetrates through the diversion support frame in the vertical direction, a spring is connected between the diversion plugging seat and the diversion support frame, an annular clamping table is fixedly arranged at the lower end of the inner barrel wall of the upper barrel body, the diversion plugging seat is arranged in the annular clamping table in a sliding sealing mode, a radial flange is fixedly arranged on the outer side of a barrel opening of the diversion plugging seat, a clamping block is fixedly arranged at the lower end of the guide post and located below the diversion 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.

6. The air supply system for single-stage coal slime drying according to claim 5, characterized in that: wash 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.