CN212334610U - Steam gyration sodium sulfate drying system - Google Patents

Abstract

The utility model provides a steam gyration sodium sulfate drying system, including solid-liquid separation unit, drying unit and collecting element, the sodium sulfate ground paste carries out solid-liquid separation through the solid-liquid separation unit, and the solid after the separation passes through the drying unit drying, is collecting the packing through the collecting element, the solid-liquid separation unit includes swirler, centrifuge and transport chute, and the ground paste is through centrifuge solid-liquid separation again after swirler initial separation, and the solid after the separation gets into drying unit through the chute, and the liquid after swirler and centrifuge separation all returns to the sodium sulfate ground paste jar. This scheme has effectually broken through conventional production efficiency, can guarantee at least that the productivity is more than 20 tons/hour, and the effectual material that has reduced is blockked up conveying equipment, has reduced the maintenance cost to equipment, is convenient for the production quality of sodium sulfate, the material large batch production of being convenient for simultaneously, the effectual manufacturing cost that has reduced has improved its economic value.

Description

Steam gyration sodium sulfate drying system

Technical Field

The utility model relates to a glauber's salt production technology, especially a steam gyration sodium sulfate drying system.

Background

Anhydrous sodium sulfate is also called anhydrous sodium sulfate, anhydrous sodium sulfate; white fine crystals or powder, easily soluble in water, hygroscopic, odorless, and nontoxic. Sodium sulfate forms heptahydrate and decahydrate, and heptahydrate (Na2SO4 & 7H2O) is white orthorhombic crystal. The anhydride was converted on heating to 24.4 ℃. Sodium sulfate is reduced to sodium sulfide when reacting with carbon at high temperature; therefore, the method is widely used for manufacturing sodium sulfide, sodium silicate and the like, and is also used for processes of papermaking, glass, printing and dyeing, synthetic fiber, leather making, food, chemical engineering and the like. In addition, the catalyst is also used as a blending agent of non-ferrous metal ore dressing, porcelain glaze, rubber, chemical fertilizer and light materials, and is also an additive of cement and concrete and a catalyst for synthesizing and preparing organic chemical products.

The traditional process flow of preparing the mirabilite is to evaporate and concentrate the mirabilite water to form supersaturated solution of the mirabilite, separate out mirabilite crystal by centrifugation, and then dry the mirabilite crystal to prepare the mirabilite, and the mirabilite produced like this will agglomerate after being stored for a certain time, thereby causing much inconvenience in use.

In chinese patent No. CN: 00112995.3 discloses a method for producing thenardite by cooling, hot melting and hot melting tower, mainly using cooling saltwater to crystallize saltwater, then removing crystal water from saltwater crystal by hot melting, although the method has short process flow, the power consumption is large, most mainly using refrigerator to circularly cool saltwater, because the method is an open process flow, at the same time, the method can only use intermittent production mode; the mirabilite thus obtained is finally caked after being piled up for a long time.

A process for preparing anhydrous sodium sulfate with large particles from natural mirabilite in salt lake includes such steps as washing sodium sulfate, dissolving sodium sulfate, refining, settling, neutralizing with sulfuric acid to obtain liquid, forced evaporation, centrifugal dewatering, and hot air drying. The technological process adopted by the method is actually a production technological process for preparing mirabilite containing crystal water by using the nitre water, then removing the crystal water in the mirabilite and finally obtaining large-particle thenardite; the mirabilite obtained by the method can be finally caked.

A process for separating mirabilite (sodium sulfate) by freezing and crystallizing it with saline solution is disclosed in Chinese patent No. CN101041444A, and includes such steps as regulating pH value, pre-cooling, controlling crystallizing temp at 0-10 deg.C, separating and recrystallizing. The technological process adopted by the method is that the mirabilite water is prepared into mirabilite containing crystal water, then the free water in the mirabilite is removed, and finally the mirabilite production technological process containing crystal water is obtained; the process method for preparing the mirabilite containing the crystal water has high energy consumption and low purity of the mirabilite, and is not beneficial to large-scale production.

The patent number CN108592611A discloses a steam rotary drying system for ammonium salt and a method for preparing ammonium salt, the steam rotary drying system is firstly used in an ammonium salt drying process, a new energy-saving and environment-friendly ammonium salt drying technology is provided, and the ammonium salt steam rotary drying system with less moisture carrying capacity, low product breakage rate, high heat efficiency, low power consumption, stable operation and energy conservation and the method for preparing ammonium salt are provided. The utility model provides a pair of steam rotary drying system for ammonium salt, including feed arrangement, steam rotary dryer, conveyor, vibratory conveying cooling screening machine and tail gas dust collector, steam rotary dryer includes feeding cover, revolving drum, ejection of compact cover, transmission and sets up a plurality of heat exchange tubes in the revolving drum. The hot air intake of the steam rotary dryer is in a countercurrent mode.

However, the method is easy to cause material blockage in the using process, and simultaneously cannot break through mass production, the maximum production efficiency can only be below 10 tons/hour, the equipment maintenance cost is high in the production process, and the production efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art, providing a convenient mass production, improving the production speed, reducing the overhaul cost of equipment and preventing the steam rotary sodium sulfate drying system of blockage.

The technical scheme of the utility model is that: the utility model provides a steam gyration sodium sulfate drying system, includes solid-liquid separation unit, drying unit and collection unit, and the sodium sulfate ground paste carries out solid-liquid separation through solid-liquid separation unit, and the solid after the separation is through drying unit drying, collecting the packing through the collection unit, solid-liquid separation unit includes swirler, centrifuge and transport chute, and the ground paste is through centrifuge solid-liquid separation again after swirler initial separation, and the solid after the separation gets into drying unit through the chute, and the liquid after swirler and the centrifuge separation all returns to the sodium sulfate ground paste jar.

The advantage of this scheme lies in, the effectual volume production that has broken through the sodium sulfate, the per hour output is more than 20 tons at least, annual output can break through more than 20 ten thousand tons, the effectual drying efficiency and the effect that improves the sodium sulfate, sodium sulfate product quality has been improved, carry out many times solid-liquid separation and washing to the sodium sulfate in the drying process, the simultaneous control washing temperature, the assurance of the sodium sulfate product quality of being convenient for, adopt wet sodium sulfate and dry sodium sulfate to mix the back and drying, the moisture of neutralization sodium sulfate, the effectual too big caking that bonds on pipeline and drying equipment of sodium sulfate humidity and causes the jam, pass through the fan in the dry collection process, make drying environment be in the negative pressure state, avoid condensing of vapor, can reduce the dust pollution environment simultaneously, the effectual environmental protection that has improved.

Furthermore, a sample washing pipe is arranged on the centrifuge, and sample washing water with the temperature of 32.8-100 ℃ is introduced into the sample washing pipe.

Preferably, the temperature of the sample washing water is 70-95 ℃.

More preferably, the temperature of the wash water is 90 ℃. The temperature is adopted to wash the sample, so that the purity of the sodium sulfate can be improved, the temperature of the sodium sulfate can be increased, the subsequent drying effect can be improved conveniently, and a certain preheating effect is achieved.

Further, the chute includes U type groove and U type support, and U type groove is installed on U type support, and the bottom inboard in U type groove is equipped with the inside lining, and the outside in U type groove is equipped with the buckle of card income on the U type support.

Preferably, U type groove adopts wear-resisting plastic materials such as PVC to make, is convenient for reduce the friction damage of material to the chute, and the upper end in U type groove is equipped with the side and opens the apron, is convenient for dredge the clearance to U type groove.

Preferably, the chute and the horizontal plane form an included angle of 30-80 degrees; optimally, the chute and the horizontal plane form an included angle of 45 degrees; the material of being convenient for can automatic gliding under the action of self gravity, and the cost of transportation of being convenient for reduces, can prevent simultaneously that the material from blockking up in the chute.

Furthermore, locate anti-siphon device on the swirler, anti-siphon device locates on the overflow pipe of swirler, and the device includes barrel and spiral deflector, and the barrel upper end is equipped with the opening with the atmosphere intercommunication, and the spiral deflector is installed at the barrel internal surface, and the overflow pipe sets up with the barrel is tangent.

Preferably, in order to reduce the occurrence of siphonage and avoid influencing the solid-liquid separation effect of the cyclone, the height difference between the overflow outlet at the upper end of the cyclone and the inlet of the cylinder is less than 3m, and the length of the overflow pipeline is less than 10 m; in order to prevent the foreign matters from falling into the barrel body, the upper end of the barrel body is provided with a cover body, and the barrel body is convenient to clean.

Furthermore, the swirler lower extreme is equipped with control valve, governing valve and flushometer, and governing valve and flushometer all locate the lower extreme of control valve.

Preferably, the flushometer includes first flushometer and second flushometer, and between control valve and the governing valve was located to first flushometer, the below of governing valve was located to the second flushometer, and the pressure release pipe can also be add to the lower extreme of second flushometer, is convenient for promote the solid ejection of compact after the swirler solid-liquid separation, lets in the interior of flushometer and washes appearance water, can play the effect of washing to the sodium sulfate, is convenient for promote the product quality of sodium sulfate.

Further, the drying unit comprises a screw conveyor, a dryer and a dust collector, one end of the screw conveyor is a feed inlet, the other end of the screw conveyor is connected with the dryer, a cover body is arranged at the outlet end of the dryer, and the upper end of the cover body is connected with the dust collector through a pipeline.

Preferably, a mixer is arranged at the inlet end of the screw conveyor and used for mixing wet sodium sulfate and dry sodium sulfate, so that the wet sodium sulfate and the dry sodium sulfate are mixed uniformly, and a preheating chamber is arranged between the screw conveyor and the dryer and connected with an air preheater and used for preheating a mixture; preferably, in order to improve the preheating effect, hot air is introduced from the bottom end of the preheating chamber, so that the mixture and the hot air are mixed conveniently, and meanwhile, the flowability of the material is improved conveniently.

Further, the collection unit includes that the shale shaker, the fill is carried machine and powder and is flowed the cooler, and the shale shaker passes through the hose and locates the lower extreme of the cover body, is equipped with coarse fodder export and fine material export on the shale shaker, and the coarse fodder export is connected with the shutoff bucket of locating the shale shaker lower extreme through the pipeline, and the fine material export is connected the fill through the pipe chute and is carried the machine, and the fill is carried the machine and is passed through duct connection powder and flow the cooler, still is equipped with the buffer memory jar on the conveyer pipe.

Preferably, be equipped with the solvent that is used for dissolving the coarse fodder in the shutoff bucket, the solvent liquid level is higher than coarse fodder export pipeline all the time, is convenient for carry out the shutoff to the pipeline mouth, and the bottom is equipped with agitating unit in the shutoff bucket, is convenient for accelerate dissolving of coarse fodder, and the upper portion of shutoff bucket is equipped with the overflow pipe, prevents that solution too much from overflowing the bucket, and the solution after dissolving is carried to reuse in the sodium sulfate slurry tank through the pump.

Further, be equipped with the tee bend pipeline on the conveyer pipe, the export of tee bend pipeline includes first export and second export, and the powder stream cooler is passed through in first export, and the sodium sulfate after the cooling is directly used for the packing, and the second export carries out the returning charge through conveyor, and the returning charge mixes with wet sodium sulfate, the sodium sulfate after solid-liquid separation.

Preferably, the returned material is dry sodium sulfate, and the moisture content of the mixed dry sodium sulfate and wet sodium sulfate is lower than 3%, so that the bonding and blockage of the sodium sulfate on pipelines and various equipment can be reduced.

Further, the powder flows cooler lower extreme and passes through three-way valve connection storage jar, and the storage jar includes first storage jar and second storage jar, and the feed end of three-way valve is equipped with emergent pipeline, emergent pipeline and any one of them storage jar intercommunication.

The drying method of sodium sulfate adopts the steam rotary sodium sulfate drying system to dry sodium sulfate, and comprises the following steps:

firstly, performing solid-liquid separation, namely performing primary solid-liquid separation on the sodium sulfate slurry in the slurry tank through a cyclone to ensure that the water content of the separated sodium sulfate is 20-70%, and performing solid-liquid separation through a centrifugal machine to obtain 4-10% of finally separated sodium sulfate;

step two, humidity neutralization, namely mixing the solid sodium sulfate finally separated in the step one with dry sodium sulfate with the moisture content of less than 1%, wherein the moisture content of the mixed sodium sulfate is less than 3%;

thirdly, drying and screening, namely drying the sodium sulfate mixed in the second step by a dryer, screening and separating the dried sodium sulfate by a vibrating screen, collecting and dissolving the separated coarse material, returning the coarse material to the slurry tank in the first step again, and carrying out next treatment on the separated fine material;

and fourthly, collecting, namely shunting the fine sodium sulfate, returning one part of the fine sodium sulfate to the second step for humidity neutralization, and cooling the other part of the fine sodium sulfate by a powder flow cooler for direct storage or packaging.

The utility model has the characteristics of as follows: this scheme has effectually broken through conventional production efficiency, can guarantee at least that the productivity is more than 20 tons/hour, and the effectual material that has reduced is blockked up conveying equipment, has reduced the maintenance cost to equipment, is convenient for the production quality of sodium sulfate, the material large batch production of being convenient for simultaneously, the effectual manufacturing cost that has reduced has improved its economic value.

The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a flow chart of the utility model;

FIG. 3 is a schematic view of a cyclone structure;

FIG. 4 is a schematic view of the cyclone installation;

FIG. 5 is a schematic view of a shaker structure;

FIG. 6 is a schematic view of a chute configuration;

1 slurry tank, 2 anti-siphon device, 3 cyclone, 4 centrifuge, 5 blender, 6 screw conveyer, 7 preheating chamber, 8 drier, 9 cover body, 10 plugging barrel, 11 vibrating screen, 12 storage tank, 13 powder flow cooler, 14 returning conveyer, 15 buffer tank, 16 bag dust remover, 17 condenser, 18 centrifugal fan, 19 bucket elevator, 20 control valve, 21 first flushing valve, 22 regulating valve, 23 second flushing valve, 24 pressure relief pipe, 25 detection port, 26 feeding main pipe, 27 overflow main pipe, 28 feeding pipe, 29 buffer cushion, 30 support, 31 vibrator, 32 fine material outlet, 33 coarse material outlet, 34 vibrating screen, 35 cover plate, 36 shaft, 37 liner, 38U-shaped support, 39 buckle.

Detailed Description

As shown in the attached drawings: the utility model provides a steam gyration sodium sulfate drying system, including solid-liquid separation unit, drying unit and collection unit, the sodium sulfate ground paste carries out solid-liquid separation through solid-liquid separation unit, the solid after the separation is dried through drying unit, collect the packing through the collection unit, solid-liquid separation unit includes swirler 3, centrifuge 4 and conveying chute, ground paste is through centrifuge 4 solid-liquid separation again after 3 preliminary separation of swirler, the solid after the separation gets into drying unit through the chute, liquid after 3 swirler and centrifuge 4 separate all returns to sodium sulfate ground paste jar 1.

This scheme is effectual has broken through the volume production of sodium sulfate, output is more than 20 tons at least per hour, the effectual drying efficiency and the effect that improve the sodium sulfate, the sodium sulfate product quality has been improved, carry out many times solid-liquid separation and washing to the sodium sulfate in the drying process, the simultaneous control washing temperature, the assurance of the sodium sulfate product quality of being convenient for, adopt wet sodium sulfate and dry sodium sulfate to mix the back simultaneously and drying, the moisture of neutralization sodium sulfate, the effectual too big caking that has avoided sodium sulfate humidity to cause the jam on pipeline and drying equipment, pass through the fan among the dry collection process, make the drying environment be in the negative pressure state, avoid condensing of vapor, can reduce the dust pollution environment simultaneously, the effectual environmental protection that has improved.

The centrifuge 4 is provided with a sample washing pipe, and sample washing water with the temperature of 32.8-100 ℃ is introduced into the sample washing pipe.

Preferably, the temperature of the sample washing water is 70-95 ℃.

More preferably, the temperature of the wash water is 90 ℃. The temperature is adopted to wash the sample, so that the purity of the sodium sulfate can be improved, the temperature of the sodium sulfate can be increased, the subsequent drying effect can be improved conveniently, and a certain preheating effect is achieved.

The chute includes U type groove and U type support 38, and U type groove is installed on U type support 38, and the bottom inboard in U type groove is equipped with inside lining 37, and the outside in U type groove is equipped with the buckle 39 of card income on U type support 38.

Preferably, wear-resisting plastic materials such as PVC are adopted in U type groove to make, are convenient for reduce the friction damage of material to the chute, and the upper end in U type groove is equipped with side division apron 35, and apron 35 passes through axle 36 to be installed on U type groove, is convenient for dredge the clearance to U type groove.

Preferably, the chute and the horizontal plane form an included angle of 30-80 degrees; optimally, the chute and the horizontal plane form an included angle of 45 degrees; the material of being convenient for can automatic gliding under the action of self gravity, and the cost of transportation of being convenient for reduces, can prevent simultaneously that the material from blockking up in the chute.

Locate anti-siphon device 2 on swirler 3, on anti-siphon device 2 located swirler 3's overflow pipe, the device includes barrel and spiral deflector, the barrel upper end be equipped with the opening of atmosphere intercommunication, the spiral deflector is installed at the barrel internal surface, the overflow pipe sets up with the barrel is tangent.

Preferably, in order to reduce the occurrence of siphonage and avoid influencing the solid-liquid separation effect of the cyclone 3, the height difference between the overflow outlet at the upper end of the cyclone 3 and the inlet of the cylinder is less than 3m, and the length of the overflow pipeline is less than 10 m; in order to prevent the foreign matters from falling into the barrel body, the upper end of the barrel body is provided with a cover body, and the barrel body is convenient to clean.

The cyclone 3 is provided at its lower end with a control valve 20, a regulating valve 22 and a flushing valve, both of which are provided at the lower end of the control valve 20.

Preferably, the flushing valve comprises a first flushing valve 21 and a second flushing valve 23, the first flushing valve 21 is arranged between the control valve 20 and the regulating valve 22, the second flushing valve 23 is arranged below the regulating valve 22, a pressure relief pipe 24 can be additionally arranged at the lower end of the second flushing valve 23, so that solid discharge after solid-liquid separation of the cyclone 3 is facilitated to be promoted, sample washing water is introduced into the flushing valve, a washing effect on sodium sulfate can be achieved, and the product quality of the sodium sulfate is facilitated to be promoted; the opposite side of the first flush valve 21 is provided with a test port 25 for testing the sampling of the sample.

Preferably, in order to avoid stopping production in the maintenance process, the cyclone 3 is provided with a plurality of devices, so that the separation efficiency and the effect can be improved, the device can be maintained without stopping production, the cyclone 3 is parallelly connected between the feeding main pipe 26 and the overflowing main pipe 28, and the anti-siphon device 2 is arranged on the overflowing main pipe 28, so that the solid-liquid separation effect of the cyclone 3 can be improved.

The drying unit includes auger delivery 6, desiccator 8 and dust collector, auger delivery 6's one end is the feed inlet, its other end is connected with desiccator 8, desiccator 8's exit end is equipped with the cover body 9, the pipe connection dust collector is passed through to the cover body 9 upper end, the dust collector is sack cleaner 16, still can be cyclone collector, centrifugal fan 18 is connected to the dust collector, still be equipped with condenser 17 ware between dust collector and the centrifugal fan 18, be convenient for get rid of the vapor in the dust, the comdenstion water in the condenser 17 returns to in the stock solution jar 1.

Preferably, a mixer 5 is arranged at the inlet end of the screw conveyor 6 and used for mixing wet sodium sulfate and dry sodium sulfate so as to be uniformly mixed, a preheating chamber 7 is arranged between the screw conveyor 6 and the dryer 8, and the preheating chamber 7 is connected with an air preheater and used for preheating the mixture; preferably, in order to improve the preheating effect, hot air is introduced from the bottom end of the preheating chamber 7, so that the mixture and the hot air can be mixed conveniently, and meanwhile, the flowability of the material can be improved conveniently.

The collecting unit includes shale shaker 11, 19 and powder stream cooler 13 are carried to the fill, the lower extreme of the cover body 9 is located through the hose to shale shaker 11, be equipped with coarse fodder export 33 and fine material export 32 on the shale shaker 11, coarse fodder export 33 is connected with the shutoff bucket 10 of locating the 11 lower extremes of shale shaker through the pipeline, fine material export 32 is connected the fill through the pipe chute and is carried machine 19, the fill is carried machine 19 and is passed through duct connection powder stream cooler 13, still be equipped with buffer tank 15 on the conveyer pipe.

Preferably, be equipped with the solvent that is used for dissolving the coarse fodder in the shutoff bucket 10, the solvent liquid level is higher than 33 pipelines in the coarse fodder export all the time, is convenient for carry out the shutoff to the pipeline mouth, and the bottom is equipped with agitating unit in the shutoff bucket 10, is convenient for accelerate dissolving of coarse fodder, and the upper portion of shutoff bucket 10 is equipped with the overflow pipe, prevents that solution too much from overflowing the bucket, and the solution after dissolving is carried to sodium sulfate slurry tank 1 through the pump and is recycled.

Preferably, the vibrating screen 11 is arranged on the support 30 through the cushion pad 29, the vibrating screen 11 is further provided with a dust removal port, the vibrating screen 34 is arranged in the vibrating screen 11, when the vibrating screen is used, sodium sulfate enters from the inlet pipe 28, the vibrating screen 34 inclines downwards 2-10 degrees along a horizontal plane, the vibrator 31 is arranged at the lower end of the vibrating screen 11, vibration of the vibrating screen 34 is driven conveniently, the screening and separating effects are promoted conveniently, coarse materials after screening and separating are discharged from the discharge outlet, and fine materials are discharged from the fine material outlet 32.

The conveying pipe is provided with a three-way pipe, the outlet of the three-way pipe comprises a first outlet and a second outlet, the first outlet is connected with a powder flow cooler 13 through a pipeline, cooled sodium sulfate is directly used for packaging, the second outlet is used for returning through a returning conveyor 14, and the returning is mixed with wet sodium sulfate, namely sodium sulfate after solid-liquid separation.

Preferably, the returned material is dry sodium sulfate, and the moisture content of the mixed dry sodium sulfate and wet sodium sulfate is lower than 3%, so that the bonding and blockage of the sodium sulfate on pipelines and various equipment can be reduced.

13 lower extremes of powder flow cooler pass through three-way valve connection storage jar 12, and storage jar 12 includes first storage jar 12 and second storage jar 12, and the feed end of three-way valve is equipped with emergent pipeline, and emergent pipeline and one of them arbitrary storage jar 12 intercommunication adopt a plurality of storage tanks, and the sodium sulfate of being convenient for further cooling is equipped with the hydrofuge dust removal pipeline on the storage tank simultaneously, the promotion of the packing efficiency of being convenient for.

The drying of the sodium sulfate by adopting the steam rotary sodium sulfate drying system comprises the following steps:

firstly, performing solid-liquid separation, namely performing primary solid-liquid separation on the sodium sulfate slurry in the slurry tank 1 through a cyclone 3 to ensure that the water content of the separated sodium sulfate is 20-70%, and performing solid-liquid separation through a centrifugal machine 4 to obtain 4-10% of finally separated sodium sulfate; preferably, the water content of the finally separated sodium sulfate is 4, 5 or 6 percent, the finally separated sodium sulfate solid is wet sodium sulfate and is conveyed through a chute, and the sodium sulfate solid automatically falls from a high position to enter the next step of treatment under the action of the gravity of the sodium sulfate; the separation capacity of the solid-liquid separator is more than 20 tons/hour;

step two, humidity neutralization, namely mixing the solid sodium sulfate finally separated in the step one with dry sodium sulfate with the moisture content of less than 1%, wherein the moisture content of the mixed sodium sulfate is less than 3%; preferably, the wet sodium sulfate and the dry sodium sulfate are mixed by the mixer 5, so that the mixing uniformity and efficiency are improved, meanwhile, the fluidity of the sodium sulfate can be improved, and the blockage caused by the adhesion of the inner wall of equipment or a pipeline is avoided;

thirdly, drying and screening, namely drying the sodium sulfate mixed in the second step by a dryer 8, screening and separating the dried sodium sulfate by a vibrating screen 11, collecting and dissolving the separated coarse material, returning the coarse material to the slurry tank 1 in the first step again, and carrying out next treatment on the separated fine material; preferably, the mixed sodium sulfate is fed into the dryer 8 through the screw conveyor 6, and in order to improve the drying efficiency of the dryer 8, the dryer 8 is inclined downward by 2 to 4 degrees, more preferably by 4 degrees, along the horizontal line; hot air is introduced before the sodium sulfate enters the dryer 8, the hot air is heated by the preheater, the heating temperature is 100-150 ℃, the fluidity and the temperature of the sodium sulfate are convenient to improve, the drying effect is convenient to improve, and the mass production of the sodium sulfate is convenient; the drying capacity of the dryer 8 was 20 tons/hour;

fourthly, collecting, namely shunting the fine sodium sulfate, returning one part of the fine sodium sulfate to the second step for humidity neutralization, and directly storing or packaging the other part of the fine sodium sulfate after cooling the other part of the fine sodium sulfate by a powder flow cooler 13; preferably, the moisture content of the dried sodium sulfate is lower than 0.5%, the dried sodium sulfate is sieved and separated by a vibrating screen 11, the sieved coarse material is dissolved by a solvent and then returns to a sodium sulfate raw material tank, the sieved fine material is lifted to a high position by a bucket elevator 19 to be collected and then is shunted after being collected, and meanwhile, the dust is collected by a centrifugal fan 18 in the drying and vibrating sieving processes, and meanwhile, the water vapor in the dust is removed. The cooling rate of the powder flow cooler 13 is 20 tons/hour or more.

The above description is the preferred embodiment of the present invention and the technical principle applied by the preferred embodiment, and for those skilled in the art, without departing from the spirit and scope of the present invention, any obvious changes based on the equivalent transformation, simple replacement, etc. of the technical solution of the present invention all belong to the protection scope of the present invention.

Claims (9)

1. The utility model provides a steam gyration sodium sulfate drying system, includes solid-liquid separation unit, drying unit and collection unit, and the sodium sulfate ground paste carries out solid-liquid separation through solid-liquid separation unit, and the solid after the separation is through drying unit drying, collects the packing through the collection unit again, its characterized in that: the solid-liquid separation unit comprises a cyclone, a centrifugal machine and a conveying chute, slurry is subjected to primary separation by the cyclone and then subjected to solid-liquid separation by the centrifugal machine, separated solids enter the drying unit through the chute, and liquid separated by the cyclone and the centrifugal machine returns to the sodium sulfate slurry tank.

2. The steam sodium sulfate rotary drying system of claim 1, wherein: the centrifuge is provided with a sample washing pipe, and sample washing water with the temperature of 32.8-100 ℃ is introduced into the sample washing pipe.

3. The steam sodium sulfate rotary drying system of claim 1, wherein: the chute includes U type groove and U type support, and U type groove is installed on U type support, and the bottom inboard in U type groove is equipped with the inside lining, and the outside in U type groove is equipped with the buckle of card income on the U type support.

4. The steam sodium sulfate rotary drying system of claim 1, wherein: the anti-siphon device is arranged on the swirler and arranged on an overflow pipe of the swirler, the anti-siphon device comprises a barrel body and a spiral guide plate, an opening communicated with the atmosphere is formed in the upper end of the barrel body, the spiral guide plate is arranged on the inner surface of the barrel body, and the overflow pipe and the barrel body are arranged in a tangent mode.

5. The steam sodium sulfate rotary drying system of claim 4, wherein: the lower end of the swirler is provided with a control valve, a regulating valve and a flushing valve, and the regulating valve and the flushing valve are arranged at the lower end of the control valve.

6. The steam sodium sulfate rotary drying system of claim 1, wherein: the drying unit comprises a screw conveyor, a dryer and a dust collector, wherein one end of the screw conveyor is a feed inlet, the other end of the screw conveyor is connected with the dryer, a cover body is arranged at the outlet end of the dryer, and the upper end of the cover body is connected with the dust collector through a pipeline.

7. The steam sodium sulfate rotary drying system of claim 1, wherein: the collecting unit comprises a vibrating screen, a bucket elevator and a powder flow cooler, the vibrating screen is arranged at the lower end of the cover body through a hose, a coarse material outlet and a fine material outlet are formed in the vibrating screen, the coarse material outlet is connected with a plugging bucket arranged at the lower end of the vibrating screen through a pipeline, the fine material outlet is connected with the bucket elevator through an inclined pipe, and the bucket elevator is connected with the powder flow cooler through a conveying pipe.

8. The steam sodium sulfate rotary drying system of claim 7, wherein: the conveying pipe is provided with a three-way pipeline, the outlet of the three-way pipeline comprises a first outlet and a second outlet, the first outlet is connected with the powder flow cooler through a pipeline, cooled sodium sulfate is directly used for packaging, the second outlet is used for returning through the conveying device, and the returning is mixed with the sodium sulfate after solid-liquid separation.

9. The steam sodium sulfate rotary drying system of claim 8, wherein: cooler lower extreme is flowed to powder passes through three-way valve connection storage jar, and the storage jar includes first storage jar and second storage jar, and the feed end of three-way valve is equipped with emergent pipeline, and emergent pipeline communicates with any one of them storage jar.

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