CN108295554B

CN108295554B - Centrifugal filtration system of cane sugar factory mud juice

Info

Publication number: CN108295554B
Application number: CN201810112266.3A
Authority: CN
Inventors: 曾启明; 谢玉武; 王慧玲; 谢陆成
Original assignee: Huangxian East Sugar Co ltd
Current assignee: Huangxian East Sugar Co ltd
Priority date: 2018-02-05
Filing date: 2018-02-05
Publication date: 2020-09-22
Anticipated expiration: 2038-02-05
Also published as: CN108295554A

Abstract

A centrifugal filtration system for cane sugar factory mud juice comprises a sugar mud sedimentation tank, an I # centrifugal machine, a II # centrifugal machine, a stirring tank, a storage tank and a washing water tank, wherein the sugar mud sedimentation tank is connected with a feed inlet of the I # centrifugal machine through a pipeline; the liquid outlet of the I # centrifuge is connected with the storage tank through a pipeline provided with an I # exhaust tank; a solid outlet of the I # centrifugal machine is connected with the stirring tank through a conduit; the stirring tank is connected with a feed inlet of a II # centrifugal machine through a pipeline; the liquid outlet of the II # centrifugal machine is connected with the storage tank through a pipeline provided with an II # exhaust tank; a solid outlet of the II # centrifugal machine is provided with a discharge pipe for guiding out the sludge; the stirring tank is also connected with the washing water tank through a pipeline. The system realizes the solid-liquid quick separation of the mud juice of the cane sugar factory, shortens the treatment time of materials, improves the production efficiency, reduces the loss of the filtered mud and the sugar content of cane, reduces the washing water amount and saves energy.

Description

Centrifugal filtration system of cane sugar factory mud juice

Technical Field

The invention relates to the technical field of filtration of mud juice of a cane sugar factory, in particular to a centrifugal filtration system of mud juice of a cane sugar factory.

Background

The Guangxi sugarcane sugar industry has very superior resource advantages, locational advantages, quality 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 high-grade, large-scale and high-level, and the Guangxi sugar industry is rapidly developed, 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, the overall scale of enterprise production and operation and the strength ranking are the first in all provinces of the whole country, and the Guangxi sugar industry becomes one of important economic prop industries of Guangxi.

At present, most of production processes in Guangxi sugar factories are sulfurous acid production processes, neutral juice in the sugar factories is separated into two parts after sedimentation, one part is clear and transparent clear juice accounting for 70-75%, and the clear juice directly enters the next 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 contained in the mash produced in the clarification process, the juice must be separated to recover the sugar content therein, so as to minimize the sugar loss and improve the sugar yield.

For a long time, the mud juice filtering equipment adopted by almost all sugar factories in China is a traditional vacuum suction filter with/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 sugar, a plurality of filter cloth-free vacuum suction filters increase the washing amount, and because the washing amount is large, the filtered mud has high moisture and 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.

Disclosure of Invention

The invention aims to provide a centrifugal filtration system for cane sugar factory sludge juice, which realizes the solid-liquid quick separation of the cane sugar factory sludge juice, shortens the treatment time of materials, improves the production efficiency, reduces the loss of filtered sludge and cane sugar, reduces the water washing amount, saves energy, promotes the further comprehensive utilization of the filtered sludge, and solves the problems of high water content of the filtered sludge, difficult transportation and influence on environment cleaning production.

The technical scheme of the invention is as follows:

a centrifugal filtration system for cane sugar factory mud juice comprises a sugar mud sedimentation tank, an I # centrifugal machine, a II # centrifugal machine, a stirring tank, a storage tank and a washing water tank, wherein the sugar mud sedimentation tank is connected with a feed inlet of the I # centrifugal machine through a pipeline; a conveying adjusting valve and a conveying flowmeter are sequentially arranged on a pipeline between the sugar mud sedimentation tank and the I # centrifugal machine from the sugar mud sedimentation tank end; the liquid outlet of the I # centrifuge is connected with the storage tank through a pipeline provided with an I # exhaust tank; a solid outlet of the I # centrifugal machine is connected with the stirring tank through a conduit; the stirring tank is connected with a feed inlet of a II # centrifugal machine through a pipeline; a feed pump, a regulating valve and a feed flowmeter are sequentially arranged on a pipeline between the stirring tank and the II # centrifugal machine from the end of the stirring tank; the liquid outlet of the II # centrifugal machine is connected with the storage tank through a pipeline provided with an II # exhaust tank; a solid outlet of the II # centrifugal machine is provided with a discharge pipe for guiding out the sludge; the stirring tank is also connected with the washing water tank through a pipeline.

Preferably: and a washing flow valve and a washing flow meter are sequentially arranged on a pipeline between the stirring tank and the washing tank from the end of the washing tank.

Preferably: and a washing water delivery valve is arranged on a pipeline between the washing water tank and the washing water flow valve.

Preferably: and a washing water valve and a washing water check valve are sequentially arranged on a pipeline between the washing water flow valve and the washing water flow meter from the end of the washing water flow valve.

Preferably: the pipeline between the washing flow valve and the washing delivery valve is also connected with the pipeline between the sugar mud sedimentation tank and the delivery regulating valve through a pipeline provided with a No. I washing water check valve and a No. I washing water valve. When the I # centrifuge needs to be washed, the water in the water washing tank is used for washing.

Preferably: the pipeline between the washing flow valve and the washing water delivery valve is also connected with the pipeline between the stirring tank and the feeding pump through the pipeline provided with the II # washing water valve and the II # washing water check valve. When the II # centrifugal machine needs to be washed, the water in the water washing tank is used for washing.

Preferably: and a settling pond valve and a conveying pump are sequentially arranged on a pipeline between the sugar mud settling pond and the conveying regulating valve from the sugar mud settling pond end.

Preferably: and a sugar liquid check valve and a sugar liquid valve are arranged on a pipeline between the I # exhaust tank and the storage tank.

Preferably: the upper portion of agitator tank be provided with agitator tank overflow mouth, the bottom of agitator tank is provided with agitator tank evacuation mouth, installs agitating unit in the agitator tank, still installs the agitator tank level gauge in the agitator tank.

Preferably: the upper part of the storage tank is provided with a storage tank overflow port, the lower part of the storage tank is provided with a storage tank emptying port, and a storage tank liquid level meter is installed in the storage tank; the storage tank is also communicated with a conveying pipe for conveying the sugar juice to be processed.

Preferably: and a feeding valve is also arranged on a pipeline between the stirring tank and the feeding pump.

Preferably: and a I # discharge valve is arranged on a conduit of a solid outlet of the I # centrifugal machine.

Preferably: and a II # discharge valve is arranged on a discharge pipe of a solid outlet of the II # centrifugal machine.

Preferably: the centrifugal machine is a horizontal sedimentation centrifugal machine.

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

(1) conveying the mud juice obtained by sedimentation in the sedimentation basin to a No. I centrifugal machine for mud juice separation, conveying the filtered juice obtained by separation into a storage tank, and discharging the sludge obtained by separation into a stirring tank;

(2) adding washing water into the stirring tank and stirring;

(3) conveying the materials in the stirring tank to a II # centrifugal machine for solid-liquid separation, conveying the separated filtered juice into a storage tank to be mixed with the filtered juice obtained in the step (1), conveying the mixed filtered juice to a concentration tank, and conveying the separated filtered mud to be used for producing organic fertilizer or feed; the water content of the filter mud obtained by separation is less than 55%, and the sugar degree of the filter mud is less than 4.5%.

Preferably: the addition amount of the washing water is 2.9-3.5 tons of washing water per hundred tons of sugarcane.

Preferably: the diameter ratio of the length of the horizontal sedimentation centrifuge to the diameter of the rotating drum in the horizontal sedimentation centrifuge is equal to 4.5.

The horizontal decanter centrifuge described above is available from the Qingdao Jiannson machines Co., Ltd, address: the Shandong Qingdao, that is, the environmental protection industry park in Mo city, is connected with the Internet site No. 4:http://www.guinarsan.com/。

the general sugar refinery in Guangxi adopts a sulfurous acid method production process, the prior treatment of the mud 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 use a stainless steel net as a service filter medium without filter cloth, has higher filtering speed than a cloth machine and does not have filter cloth, so the washing and filtering water distribution is not available, because 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 changed into 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 a sedimentation centrifuge to dehydrate the mud juice, the effect is better than that of a non-cloth vacuum suction filter, the maximum advantage is that a centrifugal mode is adopted to carry out solid-liquid separation, the water content of filter mud is lower than 55%, the sugar content of the filter mud is lower than 4.5%, a good foundation is laid for the full utilization of the filter mud, the separated filter juice is basically cleaner, the filter mud 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 filtration system of the cane sugar factory mud juice adopts the decanter centrifuge to replace a filter cloth-free vacuum suction filter to carry out solid-liquid separation on the mud juice, thereby realizing a new process for quick separation, shortening the treatment time of materials and improving 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 sedimentation centrifuge is adopted to replace a filter cloth-free vacuum suction filter, materials are quickly separated under the action of centrifugal force generated by high-speed rotation in the sedimentation centrifuge, the retention time is within 1min, the treatment speed of the materials is greatly accelerated, bagasse is not used as a filter aid, the color value of cane juice is increased by pigment materials with human beings under the heating condition of 100 ℃ of the bagasse is reduced, the sugar degree of dry filter mud is reduced, the water washing amount is reduced, the energy is saved, the water content of the filter mud is reduced, the transport amount of the filter mud is reduced, and clean production of enterprise environment is promoted. The filter-cloth-free vacuum suction filter is difficult to further comprehensively utilize due to high filter mud moisture, 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 diagram of the centrifugal filtration system of the cane sugar factory puree of the present invention;

the names of the sequence numbers in the figure are:

1. sugar mud sedimentation tank, 2, sedimentation tank valve, 3, delivery pump, 4, delivery regulating valve, 5, delivery flowmeter, 6, I # centrifuge, 7, I # exhaust tank, 8, I # discharge valve, 9, feed valve, 10, feed pump, 11, regulating valve, 12, feed flowmeter, 13, II # centrifuge, 14, II # exhaust tank, 15, II # discharge valve, 16, agitator tank overflow port, 17, agitator tank level gauge, 18, agitator tank drain port, 19, stirring device, 20, agitator tank, 21, storage tank level gauge, 22, storage tank overflow port, 23, storage tank, 24, storage tank drain port, 25, sugar liquid check valve, 26, sugar liquid valve, 27, wash water flowmeter, 28, wash water check valve, 29, wash water valve, 30, wash water flow valve, 31, wash water delivery valve, 32, wash water tank, 33, I # wash water check valve, 34, I # wash water valve, 35. II # flushing water valve, 36, II # flushing water check valve.

Detailed Description

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

Example 1

The centrifugal filtration system for the cane sugar factory mud juice comprises a sugar mud sedimentation tank 1, an I # centrifugal machine 6, an II # centrifugal machine 13, a stirring tank 20, a storage tank 23 and a washing water tank 32, wherein the sugar mud sedimentation tank 1 is connected with a feed inlet of the I # centrifugal machine 6 through a pipeline; a conveying adjusting valve 4 and a conveying flow meter 5 are sequentially arranged on a pipeline between the sugar mud sedimentation tank 1 and the I # centrifugal machine 6 from the end of the sugar mud sedimentation tank 1; the liquid outlet of the I # centrifuge 6 is connected with the storage tank 23 through a pipeline provided with an I # exhaust tank 7; the solid outlet of the I # centrifuge 6 is connected with the stirring tank 20 through a conduit; the stirring tank 20 is connected with a feed inlet of the II # centrifugal machine 13 through a pipeline; a feed pump 10, a regulating valve 11 and a feed flowmeter 12 are sequentially arranged on a pipeline between the stirring tank 20 and the II # centrifugal machine 13 from the end of the stirring tank 20; the liquid outlet of the II # centrifugal machine 13 is connected with the storage tank 23 through a pipeline provided with an II # exhaust tank 14; a solid outlet of the II # centrifugal machine 13 is provided with a discharge pipe for guiding out sludge; the agitator tank 20 is also connected to a wash water tank 32 via piping.

Preferably: a washing flow valve 30 and a washing flow meter 27 are installed on the pipeline between the agitator tank 20 and the washing tank 32 in order from the end of the washing tank 32.

Preferably: a wash water delivery valve 31 is mounted on the pipeline between the wash water tank 32 and the wash water flow valve 30.

Preferably: a wash water valve 29 and a wash water check valve 28 are installed on a pipeline between the wash water flow valve 30 and the wash water flow meter 27 in order from the wash water flow valve 30 end.

Preferably: the pipeline between the washing flow valve 30 and the washing delivery valve 31 is also connected with the pipeline between the sugar mud sedimentation tank 1 and the delivery regulating valve 4 through a pipeline provided with an I # washing water check valve 33 and an I # washing water valve 34.

Preferably: the pipeline between the wash flow valve 30 and the wash delivery valve 31 is also connected to the pipeline between the agitator tank 20 and the feed pump 10 by a pipeline fitted with a # ii wash water valve 35 and a # ii wash water check valve 36.

Preferably: a settling tank valve 2 and a delivery pump 3 are sequentially arranged on a pipeline between the sugar mud settling tank 1 and the delivery regulating valve 4 from the end of the sugar mud settling tank 1.

Preferably: a sugar liquid check valve 25 and a sugar liquid valve 26 are arranged on a pipeline between the I # exhaust tank 7 and the storage tank 23.

Preferably: the upper portion of agitator tank 20 be provided with agitator tank overflow mouth 16, the bottom of agitator tank 20 is provided with agitator tank evacuation mouth 18, installs agitating unit 19 in the agitator tank 20, still installs agitator tank level gauge 17 in the agitator tank 20.

Preferably: a storage tank overflow port 22 is formed in the upper part of the storage tank 23, a storage tank emptying port 24 is formed in the lower part of the storage tank 23, and a storage tank liquid level meter 21 is installed in the storage tank 23; the storage tank 23 is also connected to a conveying pipe for conveying the sugar juice to be processed.

Preferably: a feed valve 9 is also installed on the pipe between the agitation tank 20 and the feed pump 10.

Preferably: and a I # discharge valve 8 is arranged on a conduit of a solid outlet of the I # centrifuge 6.

Preferably: and a II discharging valve 15 is arranged on a discharging pipe of a solid outlet of the II centrifugal machine 13.

The filtering step of the mud juice of the cane sugar factory is as follows:

(1) conveying the mud juice obtained by sedimentation in the sedimentation basin to an I # horizontal sedimentation centrifuge for mud-juice separation, wherein about 95% of sugar juice exists in the mud juice, conveying the filtered juice obtained by separation into a storage tank, and discharging the sludge obtained by separation into a stirring tank;

(2) adding washing water into the stirring tank and stirring; adding 3.06% of washing water (weight ratio of washing water to sugarcane);

(3) conveying the materials in the stirring tank to a No. II horizontal sedimentation centrifuge for solid-liquid separation, conveying the separated filtered juice into a storage tank to be mixed with the filtered juice obtained in the step (1), conveying the mixture to a concentration tank, and conveying the separated filtered mud to be used for producing organic fertilizer or feed; the water content of the filter mud obtained by separation is less than 55%, and the sugar degree of the filter mud is less than 4.5%.

The applicant carried out tests, recording the following data: a sugar factory 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 sugar 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 filtration system of the mud juice in the cane sugar factory, the mud juice is separated by a secondary sedimentation centrifuge, the washing water amount is 3.06 percent (the weight ratio of the washing water amount to the cane), the filter mud water content is less than 55 percent, and the sugar degree of the dry filter mud is less than 4.5 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 45 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: 450000 tons × 1.5% (6.3% -4, 5%) × 5000 yuan/ton =607500.00 yuan =60.75 ten thousand yuan (sugar value is 5000 yuan/ton).

(2) The washing water quantity is reduced, and the energy is saved: the efficiency is brought by saving the washing water amount and reducing the evaporated water amount of the post-process, and 450000 ton x (7.81-3.06%) × 12 yuan/ton steam =256500 yuan = 25.65 ten thousand yuan (1 ton of steam evaporates 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: 96.40 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 understand that they can make various changes, modifications, additions and substitutions within the spirit and scope of the present invention.

Claims

1. The utility model provides a centrifugal filtration system of cane sugar factory mud juice which characterized in that: the sugar mud sedimentation tank comprises a sugar mud sedimentation tank (1), an I # centrifugal machine (6), an II # centrifugal machine (13), a stirring tank (20), a storage tank (23) and a water washing tank (32), wherein the I # centrifugal machine (6) and the II # centrifugal machine (13) are horizontal sedimentation centrifugal machines, and the ratio of the length of each horizontal sedimentation centrifugal machine to the diameter of a rotary drum in each horizontal sedimentation centrifugal machine is equal to 4.5; the sugar mud sedimentation tank (1) is connected with a feed inlet of a No. I centrifugal machine (6) through a pipeline; a conveying adjusting valve (4) and a conveying flow meter (5) are sequentially arranged on a pipeline between the sugar mud sedimentation tank (1) and the I # centrifugal machine (6) from the end of the sugar mud sedimentation tank (1); a liquid outlet of the I # centrifugal machine (6) is connected with a storage tank (23) through a pipeline provided with an I # exhaust tank (7); the solid outlet of the I # centrifuge (6) is connected with the stirring tank (20) through a conduit; the stirring tank (20) is connected with a feed inlet of a II # centrifugal machine (13) through a pipeline; a feed pump (10), a regulating valve (11) and a feed flowmeter (12) are sequentially arranged on a pipeline between the stirring tank (20) and the II # centrifugal machine (13) from the end of the stirring tank (20); a liquid outlet of the II # centrifugal machine (13) is connected with a storage tank (23) through a pipeline provided with an II # exhaust tank (14); a solid outlet of the II # centrifugal machine (13) is provided with a discharge pipe for guiding out sludge; the stirring tank (20) is also connected with a water washing tank (32) through a pipeline, the water washing tank (32) provides washing water for the stirring tank (20), and the adding amount of the washing water is 2.9-3.5 tons of washing water per hundred tons of sugarcane; a storage tank overflow port (22) is formed in the upper part of the storage tank (23), a storage tank emptying port (24) is formed in the lower part of the storage tank (23), and a storage tank liquid level meter (21) is installed in the storage tank (23); the storage tank (23) is also communicated with a conveying pipe for conveying the sugar juice to be processed; filtered juice obtained by separation of the I # centrifugal machine (6) and the II # centrifugal machine (13) is conveyed into a storage tank (23) to be mixed and then conveyed into a concentration tank, and filtered mud obtained by separation is conveyed to be used for producing organic fertilizer or feed; the water content of the filter mud obtained by separation is lower than 55%, and the sugar degree of the filter mud is lower than 4.5%; a washing flow valve (30) and a washing flow meter (27) are sequentially arranged on a pipeline between the stirring tank (20) and the washing tank (32) from the end of the washing tank (32); a washing water delivery valve (31) is arranged on a pipeline between the washing water tank (32) and the washing water flow valve (30); a washing water valve (29) and a washing water check valve (28) are sequentially arranged on a pipeline between the washing water flow valve (30) and the washing water flow meter (27) from the end of the washing water flow valve (30); the pipeline between the washing flow valve (30) and the washing delivery valve (31) is also connected with the pipeline between the sugar mud sedimentation tank (1) and the delivery regulating valve (4) through a pipeline provided with a No. I washing water check valve (33) and a No. I washing water valve (34); the pipeline between the washing flow valve (30) and the washing delivery valve (31) is also connected with the pipeline between the stirring tank (20) and the feeding pump (10) through a pipeline provided with a II # washing water valve (35) and a II # washing water check valve (36); a sedimentation tank valve (2) and a delivery pump (3) are sequentially arranged on a pipeline between the sugar mud sedimentation tank (1) and the delivery regulating valve (4) from the end of the sugar mud sedimentation tank (1); a sugar liquid check valve (25) and a sugar liquid valve (26) are arranged on a pipeline between the I # exhaust tank (7) and the storage tank (23); the upper portion of agitator tank (20) be provided with agitator tank overflow mouth (16), the bottom of agitator tank (20) is provided with agitator tank evacuation mouth (18), installs agitating unit (19) in agitator tank (20), still installs agitator tank level gauge (17) in agitator tank (20).