CN212548592U

CN212548592U - Centrifugal filter device of cane sugar factory mud juice

Info

Publication number: CN212548592U
Application number: CN202021045613.4U
Authority: CN
Inventors: 李锦生; 黄健泉; 李俊贵; 曾启明; 谢陆成; 王慧玲
Original assignee: Shitang Branch Of Hengxian Dongtang Sugar Co ltd
Current assignee: Shitang Branch Of Hengxian Dongtang Sugar Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-02-19
Anticipated expiration: 2030-06-09

Abstract

A centrifugal filter device for cane sugar factory mud juice comprises a frame, a shell, a rotary drum and a rotary drum; two ends of the rotating drum are arranged in the rotating drum through bearings, and the rotating drum is coaxial with the rotating drum; one end of the rotary drum is connected with a feed pipe extending into the rotary drum; the rotary drum is provided with a discharge hole; the outer wall of the rotating drum is provided with helical blades; the shell is arranged on the frame; the drum body of the rotary drum is horizontally arranged in the shell, two ends of the drum body are arranged on the rack through main bearings with seats, the drum body comprises a cylindrical cylinder body and a conical cylinder body, a liquid outlet is formed in the end of the cylindrical cylinder body, and a slag outlet is formed in the conical cylinder body; the two ends of the rotary drum are arranged on the frame through main bearings with seats, and a drum body of the rotary drum is provided with a plurality of pores; one end of the rotary drum is provided with a main belt pulley, and the other end of the rotary drum is connected with a shell of the differential mechanism through a connecting shaft; an auxiliary belt pulley is installed on an input shaft of the differential, and an output shaft is connected with the other end of the rotary drum. The device can realize the solid-liquid quick separation of the mud juice of the cane sugar factory, shorten the processing time of materials and improve the production efficiency.

Description

Centrifugal filter device of cane sugar factory mud juice

Technical Field

The utility model relates to a centrifugal dehydration's technical field specifically is a centrifugal filter equipment of cane sugar factory mud juice.

Background

The Guangxi sugarcane sugar industry has very superior resource advantages, locational advantages, production cost advantages and market expansion advantages. Guangxi is a national key sugar production area, has superior geographical position, abundant rainfall and sufficient sunshine, has the advantage of unique geographical resource for planting the sugarcane, has the sugarcane yield accounting for more than 62 percent of the whole country, and is a national main production area of the sugarcane. In recent years, Guangxi introduces capital and technology in an internal and external connection mode, promotes the development of sugar industry to be of high grade, scale and level, and the Guangxi sugar industry is transformed, upgraded and developed quickly, so that a batch of large-scale backbone enterprises and enterprise groups with strong economic strength and market competition advantages are developed, the industrial concentration is continuously improved, the comprehensive economic strength is continuously expanded, and the overall scale of enterprise production and operation and the strength ranking are the first in all provinces of the whole country, thereby becoming one of the important economic prop industries of Guangxi.

At present, most of production processes of Guangxi sugar factories are sulfurous acid production processes, neutral juice in the sugar factories is separated into two parts after being settled in a settling pond, one part is clear and transparent clear juice accounting for 70-75%, and the clear juice directly enters the next working procedure. The other part is mud juice which accounts for about 25-30%, and is mainly formed by sediment generated after cane juice, silt, cane bran and a clarifying agent react with impurities in the cane juice. Since about 95% of the juice is still in the mash produced in the clarification process, the part of the juice must be separated to recover the sugar therein, so as to minimize the loss of sugar and improve the yield of sugar.

For a long time, the mud juice filtering equipment adopted by almost all sugar factories in China is a traditional vacuum suction filter with or without filter cloth and a plate-and-frame filter press, and the equipment is used as a standard matching of the mud juice filtering equipment of the sugar factories, is used for a long time in the sugar industry production in China, and also makes great contribution to the sugar industry production in China. However, the devices have the following disadvantages in the production and use processes: firstly, the water content of the discharged filter mud is higher and reaches more than 70 percent, the transportation treatment capacity of an enterprise outside a factory is increased, and the environment is not easy to clean; secondly, the sugar content of the dry filter mud is 6.3 percent (the sugar content of the wet filter mud is 1.9 percent), and the sugar content loss is large; thirdly, when the vacuum suction filter is used for treating the mud juice, the washing water amount is larger and reaches about 8 percent, which is not beneficial to the material treatment in the subsequent working procedure (evaporation), increases the evaporation amount and the energy consumption. The filter cloth-free vacuum suction filter is used for separating mud juice, bagasse is used as a filter aid, the bagasse is subjected to chemical reaction under the heating condition of 100 ℃, the color value of the bagasse can be increased by introducing pigment substances, and the suction filter and the attached bagasse cyclone separator, the water pump and the driving equipment consume certain energy.

According to the report of Guangxi sugar network, more than 90 sugar factories are currently operated in Guangxi, and the neutralized mud juice of all sugar factories is subjected to solid-liquid separation by a filter cloth-free vacuum suction filter. In order to recover sugar in the mud juice and increase the yield of white granulated sugar, a plurality of filter cloth-free vacuum suction filters increase the washing capacity, and because the washing capacity is large and the filtered mud is high in moisture, the filter mud needs to be discharged, certain pollution is caused to the environment, the transportation is difficult, the further comprehensive utilization is difficult, and certain pressure is caused to the environment; meanwhile, the filtration liquid has low brix and the evaporation capacity of the subsequent process is increased due to the overlarge washing water amount. With the increasing attention of the country to the environmental protection problem in recent years, how to ensure the normal production of enterprises, not only can ensure the product quality and quantity of the sugar refinery, but also can ensure that the discharged pollutants reach the standard and are discharged becomes a difficult problem which troubles the development of the sugar refinery enterprises. In order to realize the solid-liquid rapid separation of the mud juice of the cane sugar factory, shorten the processing time of materials, reduce the loss of filtered mud and cane sugar, reduce the washing water amount, save energy and reduce the water content of the filtered mud, some sugar factories begin to try to utilize a centrifugal machine to carry out centrifugal dehydration on the mud juice of the cane sugar factory. However, practical application researches show that the centrifuge which is commercially available at present hardly meets the production requirement of solid-liquid separation of the mud juice of the cane sugar factory due to the high viscosity of the mud juice of the cane sugar factory.

Disclosure of Invention

The utility model aims at providing a centrifugal filter equipment of cane sugar factory mud juice, the device can realize cane sugar factory mud juice solid-liquid quick separation, shortens the processing time of material, has improved production efficiency, reduces the loss of filter mud sucrose, reduces the washing water yield, energy saving, solves the filter mud high water content, and difficult transportation reaches the problem that causes the influence to environmental cleaning production, promotes the further comprehensive utilization of filter mud.

The technical scheme of the utility model as follows:

a centrifugal filter device for cane sugar factory mud juice comprises a frame, a shell, a rotary drum and a rotary drum; two ends of the rotary drum are respectively installed in the rotary drum through bearings, the rotary drum is coaxial with the rotary drum, and two ends of the rotary drum are respectively connected with the rotary drum through bearings; one end of the rotary drum is connected with a feed pipe, and the feed pipe extends into the rotary drum; a discharge port is formed in the wall of the rotary drum at the tail end of the feeding pipe; the front end of the feeding pipe is connected with the storage tank through a feeding flowmeter and a regulating valve, and the regulating valve and the feeding flowmeter are used for controlling the feeding flow; the outer wall of the rotating drum is provided with helical blades, the outer diameter of each helical blade is close to the inner wall of the rotating drum, and the rotation is not influenced as the helical blades are close to the inner wall of the rotating drum; the shell is arranged on the frame; the drum body of the rotary drum is horizontally arranged in the shell and comprises a cylindrical barrel and a conical barrel which are connected with each other, a liquid outlet is formed in one end, away from the conical barrel, of the cylindrical barrel, and a slag outlet is formed in one end, away from the cylindrical barrel, of the conical barrel; a liquid outlet is arranged at the lower part of the casing at the liquid outlet end, and a slag outlet is arranged at the lower part of the casing at the slag outlet end; two ends of the rotary drum respectively extend out of the shell and are arranged on the frame through a main bearing with a seat, and a drum body of the rotary drum is provided with a plurality of fine holes; one end of the rotary drum is provided with a main belt pulley, and the other end of the rotary drum is connected with a differential mechanism through a connecting shaft; an auxiliary belt pulley is installed on an input shaft of the differential, and an output shaft of the differential is connected with the other end of the rotary drum.

Preferably: the rotary drum in be provided with the baffle, the baffle setting is in the one side of keeping away from the discharge gate of inlet pipe, the setting of baffle can avoid or reduce mud juice long-pending in the rotary drum and stay.

Preferably: the taper of the conical cylinder body is 6-7 degrees. The length of the conical cylinder body accounts for one half to two thirds of the drum body of the rotary drum. The distance of squeezing and separating the filter mud is lengthened, and the separated filter mud has lower water content.

Preferably: a baffle is arranged in the shell at the end of the slag discharging port to stop the sludge from being discharged from the slag discharging port.

Preferably: the outer wall of the rotary drum is provided with a limiting groove, and a limiting plate matched with the limiting groove is arranged in the casing, so that the large-amplitude shaking of the rotary drum can be avoided or reduced.

Preferably: the pitch of the conical cylinder side of the helical blade is gradually reduced, which is beneficial to the rapid pushing and extrusion of the sludge.

Preferably: the length-to-diameter ratio of the drum is equal to 5. The arrangement is more beneficial to the introduction, separation and discharge of mud juice.

The centrifugal filtering process of the mud juice of the cane sugar factory is a process of separating, filtering and dehydrating the mud juice (the mud juice contains about 95 percent of sugar juice and generally 93-96 percent of sugar juice) obtained by settling a sedimentation tank by adopting a two-stage centrifuge, and comprises the following steps:

(1) conveying the mud juice obtained by settling in the settling pond into a storage tank, then conveying the mud juice in the storage tank into a No. I centrifugal machine from a feeding pipe for mud-juice separation, conveying the separated filtered juice into a transfer tank, and discharging the separated primary filtered mud into a stirring tank;

(2) adding a small amount of washing water into the stirring tank and stirring; the adding amount of the washing water is 2.9-3.5 tons of washing water per hundred tons of sugarcane;

(3) conveying the materials in the stirring tank to a II # centrifugal machine for solid-liquid separation, conveying the separated filtered juice into a transfer tank to be mixed with the filtered juice in the step (1), conveying the mixed filtered juice into a concentration tank, and conveying the separated final filtered mud to be used for producing organic fertilizer or feed; the water content of the filter mud obtained by separation is lower than 50%, and the sugar degree of the filter mud is lower than 3.0%.

The general sugar refinery in Guangxi adopts a sulfurous acid method production process, the prior treatment of sludge juice in a sedimentation tank adopts a non-filter cloth vacuum suction filter for treatment, the non-filter cloth vacuum suction filter is one step earlier than the prior cloth vacuum suction filter, the non-filter cloth vacuum suction filter can not use filter cloth, uses a stainless steel net as a filter medium, has higher filtering speed than a cloth machine, does not have filter cloth, so washing and filtering water distribution is not available, the washing and filtering water distribution contains sugar and some non-sugar, the COD of the water is high, if the washing and filtering water distribution is directly discharged, the pollution is caused to rivers, the environmental protection treatment is difficult, and the non-filter cloth vacuum suction filter is adopted by the sugar refinery. Through ten years of application, the problem that the cloth-free vacuum suction filter has some problems, such as unclear filtered juice, needs to be processed through one process, the production process time is prolonged, the filtered mud has high water content of about 70 percent, is not suitable for transportation and comprehensive utilization, and the sugar content of the filtered mud is 6.3 percent. In order to better treat the mud juice in the sedimentation tank, the invention researches and develops the long cone angle sedimentation centrifuge to dehydrate the mud juice, the effect is better than that of the existing sedimentation centrifuge, the effect is better than that of a non-cloth vacuum suction filter, the biggest advantage is to adopt a centrifugal mode to carry out solid-liquid separation, the water content of the filtered mud is lower than 50 percent, the sugar content of the filtered mud is lower than 3.0 percent, a good foundation is laid for the full utilization of the filtered mud, the separated filtered juice is basically cleaner, and can be directly sent to the next procedure for production, the time is saved, the intangible loss of sugar is reduced, and the invention is favorable for sugar production. And the amount of washing water added in the mud juice filtering process is more than 60 percent less than that added in the traditional filtering process.

The centrifugal separation dryer for the cane sugar factory mud juice is improved by adopting the decanter centrifuge, replaces the existing environment-friendly and petrochemical decanter centrifuge to carry out solid-liquid separation on the sugar factory mud juice, realizes new equipment for quick separation, shortens the material processing time and improves the production efficiency; the filter mud cane sugar loss and the filter mud amount are reduced, the water washing amount is reduced, the energy is saved, the further comprehensive utilization of the filter mud is promoted, and the problems that the filter mud has high water content, is difficult to transport and has influence on environment clean production are solved. The novel decanter centrifuge equipment is adopted to replace the existing environment-friendly and petrochemical decanter centrifuge, materials are quickly separated in the decanter centrifuge under the action of centrifugal force generated by high-speed rotation, the retention time is within 1min, the processing speed of the materials is greatly accelerated, bagasse is not used as a filter aid, color value of cane juice is increased by pigment substances brought into the bagasse under the heating condition of 100 ℃, the sugar degree of dry filter mud is reduced, the water washing amount is reduced, energy is saved, the water content of the filter mud is reduced, the transport amount of the filter mud is reduced, and the clean production of enterprises is promoted. The prior filter cloth-free vacuum suction filter has the defects that the filter mud is high in moisture content and difficult to be comprehensively utilized further, so that certain pressure is caused to the environment; meanwhile, the filtration liquid has low brix and the evaporation capacity of the subsequent process is increased due to the overlarge washing water amount. The appearance of the sedimentation centrifuge brings a new idea to the sugar refining clarification process, solves the problem that the high water content of filter mud affects the environment, accelerates the material processing speed, and reduces the chemical change of sugar juice under the high temperature condition and the conversion loss of cane sugar; the method is beneficial to the implementation of sugar quality, recovery, energy conservation, environmental protection and consumption reduction in sugar production, can bring stable and continuous economic benefits to sugar factories, and has remarkable economic, social and environmental benefits, thereby having good application prospect.

Drawings

FIG. 1 is a schematic view of the centrifugal filter apparatus for the juice from cane sugar factory;

FIG. 2 is a schematic cross-sectional view of the bowl of FIG. 1;

the names of the sequence numbers in the figure are:

1. the device comprises a feeding pipe, 2, a frame, 3, a main belt pulley, 4, a main bearing with a base, 5, a bearing, 6, a shell, 7, a slag outlet, 8, a baffle plate, 9, a limiting plate, 10, a limiting groove, 11, a discharge hole, 12, a rotary drum, 13, a spiral blade, 14, a rotary drum, 15, a differential mechanism, 16, an auxiliary belt pulley, 17, a connecting shaft, 18, a liquid discharge hole, 19, a liquid outlet, 20, a partition plate, 21, a slag discharge hole, 22, a feeding flowmeter, 23, a regulating valve, 24 and a storage tank.

Detailed Description

In order to introduce the present invention in more detail, the present invention will be further described with reference to the following embodiments.

Example 1

A centrifugal filter device for cane sugar factory mud juice comprises a frame 2, a shell 6, a rotary drum 12 and a rotary drum 14; two ends of the rotating drum 12 are respectively installed in the rotating drum 14 through bearings 5, the rotating drum 12 is coaxial with the rotating drum 14, and two ends of the rotating drum 12 are respectively connected with the rotating drum 14 through the bearings 5; one end of the rotary drum 12 is connected with a feed pipe 1, and the feed pipe 1 extends into the rotary drum 12; a discharge port 11 is arranged on the wall of the rotary drum 12 at the tail end of the feeding pipe 1; the front end of the feeding pipe 1 is connected with a storage tank 24 through a feeding flowmeter 22 and a regulating valve 23, and the feeding flow is controlled by the regulating valve 23 and the feeding flowmeter 22; the outer wall of the rotating drum 12 is provided with a helical blade 13, the outer diameter of the helical blade 13 is close to the inner wall of the rotating drum 14, and the rotation is not influenced as close as possible; the shell 6 is arranged on the frame 2; the drum body of the rotary drum 14 is horizontally arranged in the shell 6, the drum body of the rotary drum 14 comprises a cylindrical drum body and a conical drum body which are connected with each other, a liquid outlet 19 is arranged at one end of the cylindrical drum body, which is far away from the conical drum body, and a slag outlet 7 is arranged at one end of the conical drum body, which is far away from the cylindrical drum body; a liquid outlet 18 is arranged at the lower part of the machine shell 6 at the liquid outlet 19 end, and a slag discharging port 21 is arranged at the lower part of the machine shell 6 at the slag outlet 7 end; two ends of the rotary drum 14 respectively extend out of the shell 6 and are installed on the frame 2 through a main bearing 4 with a seat, and a drum body of the rotary drum 14 is provided with a plurality of fine holes; one end of the rotary drum 14 is provided with the main belt pulley 3, the other end is connected with a differential 15 through a connecting shaft 17, and the connecting shaft 17 is connected with a shell of the differential 15; an auxiliary pulley 16 is mounted on an input shaft of the differential 15, and an output shaft of the differential 15 is connected to the other end of the drum 12.

The rotary drum 12 is internally provided with a clapboard 20, the clapboard 20 is arranged at one side of the discharge hole 11 far away from the feeding pipe 1, and the arrangement of the clapboard 20 can avoid or reduce the accumulation of mud juice in the rotary drum 12.

The taper of the conical cylinder body is 6-7 degrees. The length of the conical cylinder body accounts for one half to two thirds of the drum body of the rotary drum 14. The distance of squeezing and separating the filter mud is lengthened, and the separated filter mud has lower water content.

A baffle 8 is arranged in the shell 6 at the end of the slag discharging port 21 to block the sludge from being discharged from the slag discharging port 21.

The outer wall of the rotary drum 14 is provided with a limiting groove 10, and a limiting plate 9 matched with the limiting groove 10 is arranged in the machine shell 6, so that the large-amplitude shaking of the rotary drum 14 can be avoided or reduced.

The pitch of the conical cylinder side of the helical blade 13 is gradually reduced, which is beneficial to the rapid pushing and extrusion of the sludge.

The length to diameter ratio of the drum 12 is equal to 5.

The working principle of the centrifugal filter device for the mud juice of the cane sugar factory is as follows: the mud juice enters the rotary drum 12 from the feed pipe 1, the entering amount of the mud juice is adjusted through the feed flow meter 22 and the adjusting valve 23, the main belt pulley 3 transmits power to drive the rotary drum 14 to rotate clockwise, the output shaft of the differential 15 drives the rotary drum 12 to rotate anticlockwise, the rotary drum 12 rotates at a low speed, the rotary drum 14 rotates at a high speed, the mud juice enters the rotary drum 14 from the discharge port 11 after entering the rotary drum 12, the mud juice is centrifugally separated due to the high-speed rotation of the rotary drum 14, the liquid is separated from a small hole and a liquid outlet 19 on the rotary drum 14, and finally the liquid is discharged from a liquid discharge port 18 of; the filter mud is extruded from the slag outlet 7 by the extrusion conveying of the helical blades 13, and finally is discharged from a slag outlet 21 of the machine shell 6.

The data recorded by the test of the inventor are as follows: a sugar mill uses a filter cloth-free vacuum suction filter, the washing water amount is 7.81 percent (the weight ratio of the washing water amount to the cane), the filter mud water content is 70 percent, and the dry filter mud sugar degree is 6.3 percent (the wet filter mud sugar degree is 1.9 percent); by using the centrifugal filter device for the mud juice of the cane sugar factory, the mud juice is subjected to secondary sedimentation and centrifugal separation, the washing water amount is 3.06 percent (the weight ratio of the washing water amount to the cane), the water content of filter mud is lower than 50 percent, and the sugar degree of dry filter mud is lower than 3.0 percent.

Calculating the economic benefit:

the daily sugarcane-pressing amount of the applicant is 4000 tons, the total sugarcane-pressing amount in the season is 50 ten thousand tons, and the yield of filter mud is 1.5%.

(1) The dry filter mud sugar degree reduces the benefit of producing more sugar: 500000 t × 1.5% (6.3% -3, 0%) x 5000 yuan/t 1237500.00 yuan/t 123.75 ten thousand yuan (sugar value is 5000 yuan/t).

(2) The washing water quantity is reduced, and the energy is saved: the water amount is saved, and the evaporated water amount of the post-process is reduced, so that the efficiency is increased, wherein the water amount is 500000 ton multiplied by (7.81-3.06%) × 12 yuan/ton steam =256500 yuan = 28.50 ten thousand yuan (1 ton of steam is evaporated for 1 ton of water, and the steam is calculated as 12 yuan/ton).

(3) The benefit of reducing the traffic due to the reduction of the filter mud moisture is 10 ten thousand yuan.

Namely, the benefits produced by each squeezing season are as follows: 162.25 ten thousand yuan.

The above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should be able to make changes, modifications, additions or substitutions within the scope of the present invention.

Claims

1. A centrifugal filter device for cane sugar factory mud juice comprises a frame (2), a shell (6), a rotary drum (12) and a rotary drum (14); the method is characterized in that: two ends of the rotary drum (12) are respectively installed in the rotary drum (14) through bearings (5), and the rotary drum (12) is coaxial with the rotary drum (14); one end of the rotary drum (12) is connected with a feed pipe (1), and the feed pipe (1) extends into the rotary drum (12); a discharge port (11) is arranged on the wall of the rotary drum (12) at the tail end of the feeding pipe (1); the outer wall of the rotating drum (12) is provided with a helical blade (13); the shell (6) is arranged on the frame (2); the drum body of the rotary drum (14) is horizontally arranged in the casing (6), the drum body of the rotary drum (14) comprises a cylindrical drum body and a conical drum body which are connected with each other, a liquid outlet (19) is arranged at one end of the cylindrical drum body, which is far away from the conical drum body, and a slag outlet (7) is arranged at one end of the conical drum body, which is far away from the cylindrical drum body; a liquid outlet (18) is arranged at the lower part of the shell (6) at the liquid outlet (19) end, and a slag discharge port (21) is arranged at the lower part of the shell (6) at the slag outlet (7) end; two ends of the rotary drum (14) respectively extend out of the shell (6) and are installed on the rack (2) through a main bearing (4) with a seat, and a drum body of the rotary drum (14) is provided with a plurality of fine holes; one end of the rotary drum (14) is provided with a main belt pulley (3), the other end of the rotary drum is connected with a differential (15) through a connecting shaft (17), and the connecting shaft (17) is connected with a shell of the differential (15); an auxiliary belt pulley (16) is arranged on an input shaft of the differential (15), and an output shaft of the differential (15) is connected with the other end of the rotary drum (12).

2. The centrifugal filter device for the cane sugar factory puree according to claim 1, wherein: the rotary drum (12) is internally provided with a clapboard (20), the clapboard (20) is arranged on one side of the discharge hole (11) far away from the feeding pipe (1), and the clapboard (20) can avoid or reduce the accumulation of mud juice in the rotary drum (12).

3. The centrifugal filter device for the cane sugar factory puree according to claim 1, wherein: the taper of the conical cylinder body is 6-7 degrees.

4. The apparatus for centrifugal filtration of cane sugar factory puree according to claim 1 or 3, wherein: the length of the conical cylinder body accounts for one half to two thirds of the drum body of the rotary drum (14).

5. The centrifugal filter device for the cane sugar factory puree according to claim 1, wherein: a baffle (8) is arranged in the casing (6) at the end of the slag discharging port (21) to stop the filtered mud from being discharged from the slag discharging port (21).

6. The centrifugal filter device for the cane sugar factory puree according to claim 1, wherein: the outer wall of the rotary drum (14) is provided with a limiting groove (10), and a limiting plate (9) matched with the limiting groove (10) is arranged in the casing (6), so that large-amplitude shaking of the rotary drum (14) can be avoided or reduced.

7. The centrifugal filter device for the cane sugar factory puree according to claim 1, wherein: the pitch of the conical cylinder side of the helical blade (13) is gradually reduced, so that the rapid propelling and extrusion of the filter mud are facilitated.

8. The centrifugal filter device for the cane sugar factory puree according to claim 1, wherein: the length-to-diameter ratio of the drum (12) is equal to 5.