CN201313010Y

CN201313010Y - Filtering device after secondary decoloring in the anhydrous dextrose production process

Info

Publication number: CN201313010Y
Application number: CNU2008200277705U
Authority: CN
Inventors: 王勇; 王岩; 刘剑侠; 张全刚; 程平; 王非; 何玉梅
Original assignee: XIWANG GROUP CO Ltd
Current assignee: Shandong Xiwang Pharmaceutical Co., Ltd.
Priority date: 2008-09-11
Filing date: 2008-09-11
Publication date: 2009-09-23
Anticipated expiration: 2018-09-11

Abstract

The utility model provides a filtering device after secondary decoloring in the anhydrous dextrose production process, which comprises a shell, wherein the upper part of the shell is of a cylindrical shape, and the lower part is of a round platform shape with the diameter being gradually reduced, and is characterized in that the round-platform part of the shell is connected with a discharging pipe, a feeding pipe and a slag discharging pipe from up to down; the middle axis of the shell is provided with a vertical discharging shaft, and the lower part of the discharging shaft is movably connected with the discharging pipe, and the upper part of the shell is provided with a motor, and the vertical discharging shaft is connected with a motor rotating shaft and can rotate along with the motor, and at least two screen mesh discs are sleeved on the discharging haft, and the upper part of the screen mesh disc is provided with a screen mesh, and the cavity inside the screen mesh disc is communicated with the cavity inside the discharging shaft; and the lower part of the shell is provided with a liquid discharging pipe between the feeding pipe and the slag discharging pipe. By adopting the structure, the filtering effect is improved, and the glucose content is reduced, and the viscosity of the filtering slag is greatly reduced, and the slag throwing and separating operations can be convenient.

Description

Filter plant in the anhydrous dextrose production process behind the secondary decolourization

Technical field

The utility model relates to a kind of filter plant, is specifically related to the filter plant after the secondary charcoal absorption decolouring in the anhydrous dextrose production process.

Background technology

In the production process of DEXTROSE ANHYDROUS, material can mix a small amount of coloring matter and other impurity, has certain color, in order to guarantee the quality of final DEXTROSE ANHYDROUS, need decolour to material.The operating process of existing technology is: filter the material that comes through rotary drum and enter bleacher, add active carbon in accordance with regulations, stopped at least 30 minutes, make active carbon fully be absorbed with color substance, and detect protein content＜0.10%.Decolouring feed liquid well makes active carbon separate with liquid glucose again through being pumped into filter, and filtrate clarification back is with being pumped into basin before handing over.Filter residue can form filter cake in filter, along with filter cake thickens, the pressure of filter raises gradually, when reaching maximum pressure, need get rid of slag, and washing and filtering and inside, reactivates.

Prior art generally adopts the plate and frame filter as filter plant, since its filter capacity a little less than, need often get rid of slag operation, be unfavorable for carrying out continuously of whole technology, contain the Glucose Liquid material, the feasible excessive not easy to clean of filter residue viscosity that gets rid of the slag gained owing to be mingled with some in the filter residue, in the process of cleaning, need to consume a large amount of pure water, need a large amount of steam in the removal process again, not only waste energy but also reduced ultimate yield, caused bigger economic loss to enterprise.

Summary of the invention

Have above-mentioned deficiency at prior art, the utility model provides the filter plant behind a kind of secondary decolourization, makes to get rid of that slag is more easy to have reduced the loss of getting rid of Glucose Liquid in the slag process simultaneously.

Filter plant provided by the utility model has following characteristics: comprise housing, the top of housing is that cylindric bottom is gradually little round table-like of diameter, the housing of round table-like part is connected with discharge nozzle, feed pipe and slag dumping pipe from the top down respectively, all has valve on each pipeline; Vertical discharging axle is arranged on the position, axis of housing, this discharging axle bottom and discharge nozzle flexibly connect, the top of housing is equipped with motor, vertical discharging axle is connected with machine shaft and can rotates with motor, be set with at least two screen cloth dishes on the discharging axle, the top of screen cloth dish is screen cloth, and the order number of screen cloth can be identical also can successively increase with the discharging axle from bottom to top, and the interior cavity of the cavity in the screen cloth dish and discharging axle is communicated with; Lower housing portion has Drainage pipe at feed pipe and slag dumping pipeline enclosure, and the import of this Drainage pipe has filter screen.The screen cloth disc area is identical.The diameter of screen cloth dish is less than the bottom surface diameter of cylindrical shell.

When carrying out the filtration of the decolouring back material second time, by feed pipe material is sent into this filter plant, because the diameter of screen cloth dish is less than the bottom surface diameter of cylindrical shell, material is full of whole filter by the space between screen cloth dish and housing, material is filtered under the pressure of mass transport, filtrate enters in the cavity of screen cloth dish by screen cloth, cavity by the discharging axle enters discharge nozzle and discharges and enter the bottom operation again, active carbon and other impurity are left on the screen cloth, when the filter residue on every layer of screen cloth gathers to a certain degree, reach specified maximum pressure in the filter, need get rid of slag operation this moment, before getting rid of slag operation, close the pipe valve of slag dumping pipe and feed pipe earlier, open the valve switch of discharging tube, send back to residue liquid glucose in the device in the bleacher of decoloration process by discharging tube, filter screen by the discharging tube import before entering pipeline filters liquid glucose, oarse-grained impurity and active carbon are leached, when no filtrate when discharging tube is discharged, close the discharging tube valve, open slag dumping tube valve and motor switch simultaneously, driven by motor discharging axle and screen cloth dish rotate, filter residue on the screen cloth dish is thrown out of and leaks down from the space between screen cloth dish and housing under the action of the centrifugal, enter the slag dumping pipeline and send into previous albumen filtering technique by the slag dumping pipe, liquid glucose after albumen filters is being sent back to and is continuing in the treatment process to handle, the active carbon of gained returns to decoloration process, and all the other filter residues are discharged.

The maintenance in general supporting for convenience and later stage can all be used the identical screen cloth of order number with every layer, and the number of screen cloth is about 280 orders; But in order to make the impurity content in the gained filtrate lower, the effect of filtering is more obvious, sieve number on every layer of screen cloth dish can successively increase from bottom to top with the discharging axle, be generally the 260-300 order, when the order number was higher than 300 orders, screen cloth is as easy as rolling off a log to be stopped up by filter residue, caused that the equipment internal pressure is excessive to cause danger to production, and need the frequent slag that gets rid of, what influence was produced carries out continuously; When order number during less than 260 orders; active carbon that some are tiny or contaminant particles can enter the bottom operation with filtrate by screen cloth, cause the obstruction of equipment, and what influence was produced normally carries out; therefore the order number with screen cloth is limited to the 260-300 order, and the order number is successively increased from bottom to top with the discharging axle.

The filter that adopts the utility model to provide can filter out the active carbon and the impurity of different-grain diameter, improves greatly than the filter efficiency of existing plate and frame filter, and can successively clean between screen cloth when washing in to equipment, and effect is more obvious; When getting rid of slag since device interior pressure greater than the pressure of discharging tube, the self gravitation effect of liquid glucose in addition, liquid glucose can flow into discharging tube automatically and not need additionaling power; Drainage pipe is arranged at feed pipe and slag dumping pipeline enclosure, can avoids liquid glucose to enter other pipeline, can be with other line clogging.

Because filter plant of the present utility model has adopted above-mentioned structure, improved the effect of filtering, make that but getting rid of the material major part that remains in the equipment before the slag gets back in the bleacher, thereby no longer arrive the albumen filtering technique with filter residue, reduced processing step, yield is improved greatly, because the content of glucose reduces in the filter residue, make the viscosity of filter residue descend greatly, made things convenient for follow-up slag and the lock out operation of getting rid of.Make like this and get rid of slag carbon slurry amount at every turn and not only lacked 2/3rds, and it is few to contain glucose amount, the hammer degree descends 3 times, and viscosity also reduces greatly, and anhydrous like this carbon slurry also is not easy the plugging road.Adopt this device back to reduce power consumption, the steam consumption, get rid of slag at every turn and can save 4m ³Material, got rid of slag according to per three days and once calculate, produce 18000 tons of production lines per year and can save 480m every year ³Material, 134 tons of volume increase DEXTROSE ANHYDROUSs are for enterprise has retrieved a large amount of economic losses.

Description of drawings

Fig. 1 is the structural representation of filter plant described in the utility model;

Fig. 2 is the A-A cut-away view among Fig. 2.

1. housings among the figure, 2. feed pipe, 3. slag dumping pipe, 4. screen cloth dish, 5. discharging axle, 6. motor, 7. discharging tube, 8. discharging tube filter screen, the 9. charging mouth of pipe, the 10. slag dumping mouth of pipe, 11. valves, 12. discharge nozzles.

The specific embodiment

The decolouring of charcoal absorption for the second time back filter plant in the anhydrous dextrose production process that the utility model provides, comprise housing 1, the top of housing 1 is that cylindric bottom is gradually little round table-like of diameter, the round table-like part of housing 1 is connected with discharge nozzle 12 from the top down respectively, feed pipe 2 and slag dumping pipe 3 all have valve on each pipeline; Vertical discharging axle 5 is arranged on the position, axis of housing 1, this discharging axle bottom and discharge nozzle 12 flexibly connect, the top of housing 1 is equipped with motor 6, and vertical discharging axle 5 is connected and can rotates with motor with motor 6 rotating shafts, is set with four screen cloth dishes 4 on the discharging axle 5, the top of screen cloth dish 4 is screen cloth, the order number of screen cloth successively is respectively 260 orders, 270 orders, 280 orders from bottom to top with the discharging axle, 290 orders, the interior cavity of the cavity in the screen cloth dish and discharging axle is communicated with; Lower housing portion has Drainage pipe 7 at

feed pipe

2 and 3 of slag dumping pipes, and the import of this discharging tube 7 has filter screen 8.The diameter of the identical and screen cloth dish 4 of screen cloth dish 4 areas is less than the bottom surface diameter of cylindrical shell 1.

When carrying out the filtration of the decolouring back material second time, by feed pipe 2 material is sent into this filter plant, because the diameter of screen cloth dish 4 is less than the bottom surface diameter of cylindrical shell 1, material is full of whole filter by the space of 1 of screen cloth dish 4 and housing, material is filtered under the pressure of mass transport, filtrate enters in the cavity of screen cloth dish 4 by screen cloth, cavity by discharging axle 5 enters discharge nozzle 12 and discharges and enter the bottom operation again, active carbon and other impurity are left on the screen cloth, when gathering to a certain degree, the filter residue on every layer of screen cloth reaches specified maximum pressure in the filter, need get rid of slag operation this moment, before getting rid of slag operation, close the pipe valve of slag dumping pipe 3 and feed pipe 2 earlier, open the valve switch of discharging tube 7, send back to residue liquid glucose in the device in the bleacher of decoloration process by discharging tube 7,8 pairs of liquid glucoses of filter screen by the discharging tube import before entering pipeline filter, oarse-grained impurity and active carbon are leached, when no filtrate when discharging tube is discharged, close discharging tube 7 valves, open slag dumping pipe 3 valves and motor 6 switches simultaneously, motor 6 drives discharging axle 5 and rotates with screen cloth dish 4, filter residue on the screen cloth dish 4 is thrown out of and leaks down from the space of 1 of screen cloth dish 4 and housing under the action of the centrifugal, enter slag dumping pipe 3 and send into previous albumen filtering technique by the slag dumping pipeline, liquid glucose after albumen filters is being sent back to and is continuing in the treatment process to handle, the active carbon of gained returns to decoloration process, and all the other filter residues are discharged.

The maintenance in for convenience supporting and later stage also can every layer be all used the identical screen cloth of order number, and the number of screen cloth can satisfy the lower production technology of filter effect requirement like this about 280 orders, also can save fund for enterprise.

Claims

1. the filter plant behind the secondary decolourization in the anhydrous dextrose production process, comprise housing (1), the top of housing (1) is that cylindric bottom is gradually little round table-like of diameter, it is characterized in that: the round table-like part of housing (1) is connected with discharge nozzle (12) from the top down respectively, feed pipe (2) and slag dumping pipe (3); Vertical discharging axle (5) is arranged on the position, axis of housing (1), this discharging axle bottom and discharge nozzle (12) flexibly connect, the top of housing (1) is equipped with motor (6), vertical discharging axle (5) is connected and can rotates with motor with motor (6) rotating shaft, be set with at least two screen cloth dishes (4) on the discharging axle (5), the top of screen cloth dish (4) is screen cloth, and the interior cavity of the cavity in the screen cloth dish (4) and discharging axle is communicated with; Lower housing portion has Drainage pipe (7) between feed pipe (2) and slag dumping pipe (3).

2. filter plant according to claim 1 is characterized in that: the order number of every layer of screen cloth dish (4) upper screen cloth successively increases from bottom to top with discharging axle (5).

3. filter plant according to claim 1 and 2 is characterized in that: the order number of screen cloth dish (4) upper screen cloth is the 260-300 order.

4. filter plant according to claim 1 and 2 is characterized in that: the import of described discharging tube (7) has filter screen (8).

5. filter plant according to claim 1 and 2 is characterized in that: screen cloth dish (4) area is identical.

6. filter plant according to claim 5 is characterized in that: the diameter of screen cloth dish (4) is less than the bottom surface diameter of cylindrical shell (1).

7. filter plant according to claim 1 is characterized in that: described feed pipe (2), slag dumping pipe (3) all have valve on discharge nozzle (12) and the discharging tube (7).

8. filter plant according to claim 1 is characterized in that: identical 280 orders that are of the order number of every layer of screen cloth dish (4) upper screen cloth.