CN210993034U

CN210993034U - Drying system is used in polyaluminium chloride production

Info

Publication number: CN210993034U
Application number: CN201921872600.1U
Authority: CN
Inventors: 孙发喜; 孙帅强; 孙帅文
Original assignee: Zhengzhou Boda Concentrated Drying Equipment Co ltd
Current assignee: Zhengzhou Boda Concentrated Drying Equipment Co ltd
Priority date: 2019-11-02
Filing date: 2019-11-02
Publication date: 2020-07-14
Anticipated expiration: 2029-11-02

Abstract

The utility model provides a drying system is used in polyaluminium chloride production, wherein: including economic benefits and social benefits extrinsic cycle evaporimeter, spiral compounding transport auger, feeder, airflow channel, fan, whirlwind charge ware and dust collector, the utility model discloses a make use of the polyaluminium chloride solution that concentration is about 40% concentration to utilize the polyaluminium chloride solution about 60% of the evaporative concentration drying one-tenth, then recycle the air current drying system and dry into graininess polyaluminium chloride with the polyaluminium chloride solution that concentration is about 60%, graininess polyaluminium chloride can not produce dust pollution when using, moreover, no matter be the concentrated drying of economic benefits and social benefits extrinsic cycle evaporimeter or air current drying all than the use amount of cylinder drying machine saving steam, consequently, the utility model discloses can effectual reduction steam use amount to the energy saving reduces solid-state polyaluminium chloride's manufacturing cost.

Description

Drying system is used in polyaluminium chloride production

Technical Field

The utility model relates to a polyaluminium chloride production facility technical field, concretely relates to drying system is used in polyaluminium chloride production.

Background

Polyaluminium chloride is a novel water purifying material, is an inorganic high-molecular coagulant, is also called polyaluminium for short, has high electric neutralization and bridging effects on colloids and particles in water, can powerfully remove micro-toxic substances and heavy metal ions, and has stable properties. Due to the bridging action of hydroxide ions and the polymerization action of polyvalent anions, the produced polyaluminium chloride is an inorganic macromolecular water treatment agent with relatively large molecular weight and relatively high charge. The form can be divided into solid and liquid. The solid is divided into dark brown, beige, golden yellow and white according to different colors, the liquid can be colorless and transparent, yellowish, light yellow to yellow brown, and the polyaluminium chloride with different colors has larger difference in application and production technology.

The solid polyaluminium chloride is mainly prepared by drying a liquid polyaluminium chloride solution by a roller drying system or a spray drying system, wherein the solid polyaluminium chloride produced by the spray drying system exists in a powder form, the solid polyaluminium chloride produced by the roller drying system exists in a granular form, and the powdery polyaluminium chloride is easy to generate dust pollution in use, corresponding dust removing equipment is required to be added for reducing the dust pollution along with the enhancement of environmental awareness of people, but the investment of the dust removing equipment inevitably increases the use cost of the polyaluminium chloride, and the polyaluminium chloride forming the dust pollution is collected by the dust removing equipment after the dust removing equipment is adopted, so that the waste of raw materials is caused, the use cost of the polyaluminium chloride is further increased, and the granular polyaluminium chloride cannot generate the dust pollution in use, therefore, at present, granular polyaluminium chloride in the market is in short supply and has high price.

Granular polyaluminium chloride is mainly formed by drying through a roller drying system, as shown in figure 1, the roller drying system directly sends polyaluminium chloride solution with the concentration of about 40 percent produced by the polyaluminium chloride into a roller dryer for drying, so as to remove water in the polyaluminium chloride solution, and a large amount of heat energy is consumed, thus the production cost of the granular polyaluminium chloride is high, and the granular polyaluminium chloride in the market is high in price. Therefore, how to reduce the production cost of solid polyaluminium chloride while avoiding dust pollution becomes a technical problem to be solved urgently in the production of solid polyaluminium chloride.

SUMMERY OF THE UTILITY MODEL

In conclusion, in order to overcome the not enough of prior art problem, the utility model provides a drying system is used in polyaluminium chloride production, this system utilizes the polyaluminium chloride solution about 40% concentration to utilize double-effect extrinsic cycle evaporator evaporative concentration drying to become about 60% polyaluminium chloride solution, then recycles the air current drying system and dries into graininess polyaluminium chloride with the polyaluminium chloride solution that concentration is about 60%, graininess polyaluminium chloride can not produce dust pollution when using, moreover, no matter be the concentrated drying of double-effect extrinsic cycle evaporator or air current drying all compare the use amount of drum dryer saving steam, consequently, the utility model discloses can effectual reduction steam use amount to the energy saving reduces solid-state polyaluminium chloride's manufacturing cost.

In order to solve the technical problem, the utility model discloses a technical scheme does:

a drying system for polyaluminium chloride production, wherein: including double-effect extrinsic cycle evaporimeter, spiral compounding transport auger, feeder, air flow pipeline, fan, whirlwind charge collector and dust collector, double-effect extrinsic cycle evaporimeter include that one imitates separator, one imitate heater, two effect separator, two effect heaters and vacuum pump, the feed inlet intercommunication poly aluminium chloride solution source of one imitate separator, the discharge gate intercommunication one imitate the feed inlet of heater and two effect separator's feed inlet of one imitate separator, the discharge gate intercommunication one imitate the circulation feed inlet of separator of heater, the air inlet intercommunication steam source of one imitate heater, one imitate the heater lower extreme set up the bin outlet, the gas outlet intercommunication two effect heater's air inlet of one imitate separator, two effect separator's discharge gate intercommunication two effect heater's feed inlet, two effect heater's discharge gate intercommunication two effect separator's circulation feed inlet, the second-effect heater lower extreme sets up the bin outlet, the gas outlet of second-effect separator communicate the air inlet of vacuum pump, the bin outlet of first-effect heater and the bin outlet of second-effect heater all communicate with the feed inlet of delivery pump, the discharge gate of delivery pump communicate the feed inlet of spiral compounding transport auger, the discharge gate of spiral compounding transport auger communicate the feed inlet of feeder, the discharge gate of feeder communicate airflow conduit, airflow conduit's air intake intercommunication atmosphere, airflow conduit's air intake on be provided with air heating device, airflow conduit's air outlet communicate the air intake of whirlwind receipts glassware, whirlwind receipts glassware's air outlet communicate the air intake of fan, whirlwind receipts glassware's discharge gate connect the feed inlet of closing wind tripper, the discharge gate of closing wind tripper communicates the feed inlet and the feed bin of spiral compounding transport auger respectively through the pipeline, and an air outlet of the fan is connected with a dust removal device.

Further, a condenser is arranged between the air outlet of the two-effect separator and the air inlet of the vacuum pump, the air inlet of the condenser is communicated with the air outlet of the two-effect separator, the air outlet of the condenser is communicated with the air inlet of the vacuum pump, a condensate outlet of the condenser is communicated with the condensate pump, and a cooling water inlet and a cooling water outlet of the condenser are communicated with a cooling water source.

Further, the pipeline of feed inlet and the polyaluminium chloride solution source intercommunication of first effect separator on be provided with one and imitate the feed valve, the pipeline of the bin outlet of first effect heater and delivery pump intercommunication on be provided with one and imitate the relief valve, the pipeline of the bin outlet of two effect heaters and delivery pump intercommunication on be provided with two and imitate the relief valve, the pipeline of the feed inlet intercommunication of discharge gate and two effect separators of first effect separator on be provided with two and imitate the feed valve.

Further, the air heating device comprises a housing, a radiator and a condensation drain pipeline, wherein an air inlet of the housing is communicated with the atmosphere, an air outlet of the housing is communicated with an air inlet of the airflow pipeline, the radiator is arranged in the housing, the air inlet of the radiator is communicated with a steam source, a condensation water outlet of the radiator is connected with the condensation drain pipeline, and the condensation drain pipeline is a drain pipeline with a bypass.

Further, dust collector including spraying dusting tower and circulating pump, the inlet that sprays of spraying dusting tower communicate water source from beginning, the air outlet of fan is connected to the air inlet of spraying dusting tower, the circulation liquid outlet of spraying dusting tower pass through circulating pump and the circulation inlet intercommunication of spraying dusting tower, the air outlet intercommunication atmosphere of spraying dusting tower.

Furthermore, a circulating mixing valve is arranged on a pipeline communicated with a feed inlet of the spiral mixing conveying auger and a discharge outlet of the air-closed discharger, and a discharge valve is arranged on a pipeline communicated with the feed bin and the discharge outlet of the air-closed discharger.

The utility model has the advantages that:

1. the utility model discloses a it utilizes the polyaluminium chloride solution of concentration for about 40% concentration evaporative concentration drying to become about 60% polyaluminium chloride solution, then recycles the air current drying system and becomes graininess polyaluminium chloride with the polyaluminium chloride solution drying that concentration is about 60%, graininess polyaluminium chloride can not produce dust pollution when using, moreover, no matter be the concentrated drying of economic benefits external circulation evaporimeter or air current drying all than the use amount of drum drier saving steam, consequently, the utility model discloses can effectual reduction steam use amount to the energy saving reduces solid-state polyaluminium chloride's manufacturing cost.

2. The utility model discloses a setting of auger is carried to spiral compounding, carries the back with the granular polyaluminium chloride of complete drying's polyaluminium chloride mixture about 60%, utilizes the moisture in the granular polyaluminium chloride of dry absorption about 60% polyaluminium chloride solution, later recycles the air flow drying mixture after air heater heats, can reduce the air flow drying energy resource consumption, improves the air flow drying efficiency.

3. The utility model discloses a 60% polymeric aluminum chloride solution about with the graininess polymeric aluminum chloride of complete drying mix the back through the air current drying system transport drying, when the hot gas flow carried the material of feeder output and flows, utilize air pressure to blow off the mixture into graininess, consequently, the utility model discloses the solid state polymeric aluminum chloride who produces is graininess, and graininess polymeric aluminum chloride can not produce dust pollution when using, satisfies the environmental protection requirement.

4. The utility model discloses simple structure, convenient to use, low cost, energy resource consumption in can effectual reduction solid state poly aluminium chloride production process reduces heat emission, energy saving and emission reduction, reduction in production cost improves the performance of enterprises, and the graininess poly aluminium chloride of coproduction does not have dust pollution almost when using, can reduce solid state poly aluminium chloride's use cost.

Drawings

FIG. 1 is a schematic diagram of a conventional spray drying system for polyaluminium chloride;

fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in figure 2, the drying system for polyaluminium chloride production comprises a double-effect external circulation evaporator, a spiral mixing and conveying auger 11, a feeder 12, an airflow pipeline 13, a fan 15, a cyclone collector 14 and a dust removal device, wherein the double-effect external circulation evaporator comprises a first-effect separator 3, a first-effect heater 4, a second-effect separator 5, a second-effect heater 6 and a condenser 9, a feed inlet of the first-effect separator 3 is communicated with a polyaluminium chloride solution source 1, a pipeline for communicating the feed inlet of the first-effect separator 3 with the polyaluminium chloride solution source 1 is provided with a first-effect feed valve 18, a discharge outlet of the first-effect separator 3 is communicated with a feed inlet of the first-effect heater 4 and a feed inlet of the second-effect separator 5, a pipeline for communicating the discharge outlet of the first-effect separator 3 with the feed inlet of the second-effect separator 5 is provided with a second-effect feed valve 21, a discharge outlet of the first-effect heater 4 is communicated with a circulation feed inlet of the, the air inlet of the first-effect heater 4 is communicated with the steam source 2, the lower end of the first-effect heater 4 is provided with a discharge hole, the air outlet of the first-effect separator 3 is communicated with the air inlet of the second-effect heater 6, the discharge hole of the second-effect separator 5 is communicated with the feed inlet of the second-effect heater 6, the discharge hole of the second-effect heater 6 is communicated with the circulating feed inlet of the second-effect separator 5, the lower end of the second-effect heater 6 is provided with a discharge hole, the air outlet of the second-effect separator 5 is communicated with the air inlet of the condenser 9, the air outlet of the condenser 9 is communicated with the air inlet of the vacuum pump 7, the condensed water outlet of the condenser 9 is communicated with the condensate pump 10, the cooling water inlet and the cooling water outlet of the condenser 9 are communicated with a cooling water source, the discharge hole of the first-effect heater 4 and the discharge hole of the second-effect heater 6 are both communicated with the feed inlet of the conveying pump 8, the pipeline of the bin outlet of two effect heater 6 and delivery pump 8 intercommunication on be provided with two effect relief valve 20, the discharge gate of delivery pump 8 intercommunication spiral compounding carry the feed inlet of auger 11, the spiral compounding carry the discharge gate of auger 11 and communicate the feed inlet of feeder 12, the discharge gate of feeder 12 communicate airflow pipeline 13, airflow pipeline 13's air intake intercommunication atmosphere, airflow pipeline 13's air intake on be provided with air heater unit, air heater unit includes housing 22, radiator 23 and condensation drain line 24, housing 22's air inlet intercommunication atmosphere, housing 22's gas outlet intercommunication airflow pipeline 13's air intake, housing 22 in be provided with radiator 23, radiator 23's air inlet intercommunication steam source 2, radiator 23's condensation delivery port connect condensation drain line 24, condensation drain line 24 be the drain line of taking the bypass, airflow channel 13's air outlet intercommunication whirlwind charge feeder 14's air intake, whirlwind charge feeder 14's air outlet intercommunication fan 15's air intake, whirlwind charge feeder 14's discharge gate connect the feed inlet of closing wind tripper 16, the discharge gate of closing wind tripper 16 communicates spiral compounding respectively through the pipeline and carries the feed inlet and the feed bin 17 of auger 11, the discharge gate of closing wind tripper 16 and spiral compounding carry the pipeline of the feed inlet intercommunication of auger 11 on be provided with circulation compounding valve 27, the pipeline of closing wind tripper 16's discharge gate and feed bin 17 intercommunication on be provided with discharge valve 28. And an air outlet of the fan 15 is connected with a dust removal device. Dust collector includes spraying dusting tower 25 and circulating pump 26, spraying dusting tower 25 spray inlet intercommunication water source, the air inlet of spraying dusting tower 25 is connected the air outlet of fan 15, the circulation liquid outlet of spraying dusting tower 25 pass through circulating pump 26 and the circulation inlet intercommunication of spraying dusting tower 25, the air outlet intercommunication atmosphere of spraying dusting tower 25.

When the device is used, the first-effect feed valve 18 is opened, the first-effect discharge valve 19 and the second-effect discharge valve 20 are closed, polyaluminium chloride solution with the concentration of about 40% produced by a polyaluminium chloride production system enters the first-effect separator 3, high-temperature steam provided by the steam source 2 enters from the air inlet of the first-effect heater 4, the vacuum pump 7 is opened to pump vacuum, the polyaluminium chloride solution with the concentration of about 40% enters the feed inlet of the first-effect heater 4 from the discharge outlet of the first-effect separator 3, the high-temperature steam in the first-effect heater 4 is introduced into the polyaluminium chloride solution to be boiled to generate bubbles, the bubbles carry the polyaluminium chloride solution to flow out from the discharge outlet of the first-effect heater 4 under the action of vacuum and pressure difference, and then enter the first-effect separator 3 again from the circulating feed inlet of the first-effect separator 3, so that circulating heating evaporation is formed, and the moisture in the, the polyaluminum chloride solution was preliminarily concentrated. Opening the two-effect feed valve 21, under the action of the pressure difference between the one-effect separator 3 and the two-effect separator 5, allowing the polyaluminium chloride solution in the one-effect separator 3 to enter the two-effect separator 5 through the two-effect feed valve 21, allowing the steam separated by the one-effect separator 3 to enter the two-effect heater 6 from the air inlet of the two-effect heater 6, allowing the polyaluminium chloride solution to flow out of the discharge port of the two-effect separator 5 and enter the two-effect heater 6, allowing the steam separated by the one-effect separator 3 to reheat the polyaluminium chloride solution in the two-effect heater 6 to boil, under the action of vacuum and pressure difference, the polyaluminium chloride solution forms circulation between the double-effect heater 6 and the double-effect separator 5, steam discharged from the double-effect separator 5 enters a condenser 9, condensed water is condensed in the condenser 9, the condensed water is discharged through a condensing pump 10, and non-condensed gas is discharged from the evacuation port of the condenser 9 under the action of a vacuum pump 7. The polyaluminum chloride solution with the concentration of about 40 percent is evaporated and concentrated to the concentration of about 60 percent.

Opening a conveying pump 8, a first-effect discharge valve 19, a second-effect discharge valve 20 and a feeding valve, feeding the polyaluminium chloride solution with the concentration of about 60% evaporated and concentrated by a double-effect external circulation evaporator into a spiral mixing conveying auger 11 under the action of the conveying pump 8, opening a circulating mixing valve 27 and an air-closing discharger 16, closing a discharge valve 28, feeding the dried polyaluminium chloride in a cyclone collector 14 into the spiral mixing conveying auger 11, conveying and mixing the polyaluminium chloride solution with the dried polyaluminium chloride in the concentration of about 60% and the dried polyaluminium chloride in the spiral mixing conveying auger 11, then flowing out from a discharge port of the spiral mixing conveying auger 11 and feeding the mixture into a feeder 12, and increasing the concentration of the polyaluminium chloride solution with the concentration of about 60% and the dried polyaluminium chloride in the conveying and mixing process in the spiral mixing conveying auger 11.

Starting a fan 15, allowing outside air to enter a shell of the air heating device, allowing high-temperature steam to enter from an air inlet of a radiator 23, allowing the radiator 23 to radiate heat and heat the air entering the shell, heating and drying the air, allowing the high-temperature dry air to flow along an airflow pipeline 13 under the action of the fan 15, allowing the high-temperature dry air to flow along the airflow pipeline 13 when flowing through a feeder 12, allowing the mixed polyaluminium chloride output by the feeder 12 to flow along the airflow pipeline 13, allowing the high-temperature dry air to absorb moisture of the mixed polyaluminium chloride during the flowing process, drying and concentrating the polyaluminium chloride, allowing the polyaluminium chloride after airflow drying and the air to enter a cyclone collector 14, extracting the air by the fan 15, allowing the polyaluminium chloride to flow out from a discharge port at the lower end of the cyclone collector 14, allowing the polyaluminium chloride to enter a spiral mixing conveying auger 11 again through a circulating discharge valve 28 of an, the operation is repeated in such a circulating way until the polyaluminium chloride is completely dried into granular solid polyaluminium chloride, then the circulating discharge valve 28 is closed, the discharge valve 28 is opened, the granular solid polyaluminium chloride in the cyclone collector 14 enters the storage bin 17 through the air-closing discharger 16 and the discharge valve 28 for storage, the air pumped out by the fan 15 enters the spray dust removal tower 25, the air pumped out by the fan 15 is sprayed and cleaned by tap water in the spray dust removal tower 25, the air is cleaned and dedusted and then is emptied, and the tap water entering the spray dust removal tower 25 is recycled under the action of the circulating pump 26.

It should be noted that the above-mentioned embodiments are illustrative and not restrictive of the technical solutions of the present invention, and equivalents of those skilled in the art or other modifications made according to the prior art are intended to be included within the scope of the claims of the present invention as long as they do not exceed the spirit and scope of the technical solutions of the present invention.

Claims

1. A drying system is used in polyaluminium chloride production which characterized in that: including double-effect extrinsic cycle evaporator, spiral compounding transport auger (11), feeder (12), air flow pipeline (13), fan (15), whirlwind charge collector (14) and dust collector, double-effect extrinsic cycle evaporator include one imitate separator (3), one imitate heater (4), two imitate separator (5), two imitate heater (6) and vacuum pump (7), the feed inlet intercommunication polyaluminium chloride solution source (1) of one imitate separator (3), the discharge gate intercommunication of one imitate separator (3) the feed inlet of one imitate heater (4) and the feed inlet of two imitate separator (5), the discharge gate intercommunication of one imitate heater (4) the circulation feed inlet of one imitate separator (3), the air inlet intercommunication steam source (2) of one imitate heater (4), one imitate heater (4) lower extreme set up the bin outlet, the gas outlet of first effect separator (3) intercommunication two-effect heater's (6) air inlet, the discharge gate intercommunication two-effect heater's (6) of two-effect separator (5) the feed inlet, the circulation feed inlet of two-effect separator (5) of discharge gate intercommunication two-effect heater (6), two-effect heater's (6) lower extreme sets up the bin outlet, the gas outlet intercommunication vacuum pump's (7) air inlet of two-effect separator (5), the bin outlet of first effect heater (4) and two-effect heater's (6) the bin outlet all with the feed inlet intercommunication of delivery pump (8), the discharge gate intercommunication spiral compounding of delivery pump (8) carry the feed inlet of auger (11), the discharge gate intercommunication feed inlet of spiral compounding delivery auger (11) feed inlet of feeder (12), the discharge gate intercommunication air flow pipeline (13) of feeder (12), air intake intercommunication atmosphere of airflow pipeline (13), the air intake of airflow pipeline (13) on be provided with air heating device, the air intake of air outlet intercommunication whirlwind charge collector (14) of airflow pipeline (13), the air intake of air outlet intercommunication fan (15) of whirlwind charge collector (14), the discharge gate of whirlwind charge collector (14) connect the feed inlet that closes wind tripper (16), the discharge gate that closes wind tripper (16) communicates the feed inlet and feed bin (17) that spiral compounding carried auger (11) respectively through the pipeline, the air outlet of fan (15) connect dust collector.

2. The drying system for polyaluminium chloride production as claimed in claim 1, wherein: the gas outlet of two effect separator (5) and the air inlet of vacuum pump (7) between be provided with condenser (9), the air inlet of condenser (9) communicate the gas outlet of two effect separator (5), the gas outlet of condenser (9) communicates the air inlet of vacuum pump (7), the comdenstion water export of condenser (9) communicate condensate pump (10), the cooling water import and the cooling water export of condenser (9) communicate cooling water source.

3. The drying system for polyaluminium chloride production as claimed in claim 1, wherein: the pipeline of feed inlet and poly aluminium chloride solution source (1) intercommunication of first effect separator (3) on be provided with one and imitate feed valve (18), the pipeline of the bin outlet of first effect heater (4) and delivery pump (8) intercommunication on be provided with one and imitate discharge valve (19), the pipeline of the bin outlet of second effect heater (6) and delivery pump (8) intercommunication on be provided with two and imitate discharge valve (20), the pipeline of the feed inlet intercommunication of discharge gate and second effect separator (5) of first effect separator (3) on be provided with two and imitate feed valve (21).

4. The drying system for polyaluminium chloride production as claimed in claim 1, wherein: the air heating device comprises a housing (22), a radiator (23) and a condensation hydrophobic pipeline (24), wherein an air inlet of the housing (22) is communicated with the atmosphere, an air outlet of the housing (22) is communicated with an air inlet of an air flow pipeline (13), the housing (22) is internally provided with the radiator (23), an air inlet of the radiator (23) is communicated with a steam source (2), a condensation water outlet of the radiator (23) is connected with the condensation hydrophobic pipeline (24), and the condensation hydrophobic pipeline (24) is a hydrophobic pipeline with bypass.

5. The drying system for polyaluminium chloride production as claimed in claim 1, wherein: dust collector including spraying gas wash tower (25) and circulating pump (26), the spraying inlet intercommunication water source of spraying gas wash tower (25), the air outlet of fan (15) is connected to the air inlet of spraying gas wash tower (25), the circulation liquid outlet of spraying gas wash tower (25) pass through circulating pump (26) and the circulation inlet intercommunication of spraying gas wash tower (25), the air outlet intercommunication atmosphere of spraying gas wash tower (25).

6. The drying system for polyaluminium chloride production as claimed in claim 1, wherein: the pipeline that closes the discharge gate of wind tripper (16) and the feed inlet intercommunication of spiral compounding transport auger (11) on be provided with circulation compounding valve (27), the pipeline that closes the discharge gate of wind tripper (16) and feed bin (17) intercommunication on be provided with discharge valve (28).