CN112574264A

CN112574264A - Method for recovering sugar liquor from activated carbon in sucralose decoloring section

Info

Publication number: CN112574264A
Application number: CN202011365525.7A
Authority: CN
Inventors: 李正华; 夏家信; 王东
Original assignee: Anhui Jinhe Industrial Co Ltd
Current assignee: Anhui Jinhe Industrial Co Ltd
Priority date: 2020-11-28
Filing date: 2020-11-28
Publication date: 2021-03-30

Abstract

The invention relates to a method for recovering sugar liquor from activated carbon in a sucralose decoloring section, which is characterized by comprising the following steps of: (1) adding activated carbon from a decoloring working section into a dissolving kettle, adding water into the dissolving kettle, stirring and dissolving for 60-120min, controlling the temperature of water to be 40-45 ℃, and controlling the volume ratio of water to activated carbon to be 5-8: 1; (2) and (4) feeding the dissolved mixed solution into a filter press for filtering, feeding the filter liquor after filter pressing into a sugar water receiving tank, and feeding solid activated carbon for incineration. The invention has the advantages that: the average content of sucralose in the original waste activated carbon is 20 percent; the average content of sucralose in the recovered waste activated carbon is 11.6 percent; the original waste activated carbon contains a large amount of cane sugar, so that the volume and the mass of the activated carbon are expanded, the mass of the washed activated carbon is reduced compared with that of the activated carbon before washing, and every 500kg of the original waste activated carbon can be reduced by about 30kg, so 540kg of waste activated carbon can be reduced every month; the solid waste treatment cost is reduced.

Description

Method for recovering sugar liquor from activated carbon in sucralose decoloring section

Technical Field

The invention belongs to the technical field of sucralose production, and relates to a method for recovering a sugar solution from activated carbon in a sucralose decoloring section.

Background

Sucralose is used as a novel sweet food additive, has more advantages than sucrose, saccharin, AK sugar, aspartame, stevioside and the like, has high safety and stable performance, is a novel high-quality non-nutritional high-efficiency sweetener, and is an optimal ideal sweet substitute for foods for patients with obesity, cardiovascular diseases and diabetes mellitus; also belongs to the field of fine chemical products, and is a branch product of food additives. It has not only rapidly expanded application range in health food and medicine, but also widely applied to more than 300 processed products such as baked food, beverage, chewing coffee, dairy products, frozen dessert, ice cream, pudding, jelly, jam, syrup and the like, and has been widely accepted by the market at present and becomes one of the most popular high-potency sweeteners.

At present, in the production process of sucralose, in the last step of decolorization link, activated carbon is needed to decolorize sugar water, so that the color of the sugar water is guaranteed to reach the standard; however, because the activated carbon has adsorbability, 10-20% of the sugar water is adsorbed by the activated carbon in the decolorization treatment process, and the part of the adsorbed sugar water is generally discharged as waste activated carbon, thereby causing waste.

Disclosure of Invention

The invention aims to solve the problem of waste caused by taking away and discharging 10-20% of sugar water adsorbed by activated carbon in the existing sucralose production, and provides a method for recovering sugar liquid by activated carbon in a sucralose decoloring section.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a method for recovering sugar liquor from activated carbon in a sucralose decoloration section is characterized by adopting the following devices:

the dissolving kettle is connected with the filter press and the syrup receiving tank in sequence through pipelines;

the method comprises the following steps:

(1) adding activated carbon from a decoloring working section into a dissolving kettle, adding water into the dissolving kettle, stirring and dissolving for 60-120min, controlling the temperature of water to be 40-45 ℃, and controlling the volume ratio of water to activated carbon to be 5-8: 1;

(2) feeding the dissolved mixed solution into a filter press, returning the lower solution of the filter press into a dissolving kettle to form circulation, and feeding the filter-pressed filtrate into a sugar water receiving tank (measuring the sugar degree of the sugar water, and if the sugar degree is lower than 4%, pumping the sugar water back into the dissolving kettle to be used as the dissolved solution for dissolving the activated carbon in the next kettle) after the filtrate is obviously clear; the residual solid activated carbon in the filter press is sent to incineration.

The process principle is as follows: the sugar water is recovered by utilizing the adsorption and desorption of the active carbon in the solutions with different concentrations; the active carbon has certain adsorbability, and can adsorb partial sugar water, so that sugar water loss is caused; in addition, the active carbon has releasing property in clear water, and can release the adsorbed sugar water.

The invention has the advantages that:

1. reduce the syrup loss, increase the benefit: the average content of sucralose in the original waste activated carbon is 20% (to be sent for incineration); the average content of sucralose in the recovered waste activated carbon is 11.6 percent; the average content of sucralose in the washing aqueous solution is 8.3 percent; calculated according to the existing production load, 400kg of original waste activated carbon is generated every four shifts on average, 9000kg is generated every month, every 1200kg can be filled in a filter press, and the dilute sucralose aqueous solution which can be recovered every month has 15m³Sugar content 8.3%; according to 60% conversion rate, the product sugar is: 747 kg;

2. environmental protection and emission reduction: the original waste activated carbon contains a large amount of cane sugar, so that the volume and the mass of the activated carbon are expanded, the sugar content of the activated carbon before and after washing is compared, the mass of the washed activated carbon is reduced compared with that of the activated carbon before washing, and each 500kg of the original waste activated carbon can be reduced by about 30kg, so that 540kg of the waste activated carbon can be reduced each month; the solid waste treatment cost is reduced.

Drawings

FIG. 1 is a schematic diagram of a process flow for recovering sugar liquor from activated carbon in a sucralose decoloring section;

FIG. 2 is a schematic of a prior art treatment process flow.

Detailed Description

The invention is further illustrated with reference to fig. 1:

a method for recovering sugar liquor from activated carbon in a sucralose decoloring section comprises the following specific implementation steps:

example 1

(1) Adding 500Kg of activated carbon (with sugar content of 20%) obtained from the decolorization section into a dissolution kettle, adding 2500L of water into the dissolution kettle, heating to 42 ℃, and stirring for dissolution for 60 min;

(2) sending the dissolved mixed solution into a filter press for filtering, returning the filtrate of the filter press into a dissolving kettle to form circulation, and sending 2000L (with sugar content of 8%) of the filter-pressed filtrate into a sugar water receiving tank after the filtrate is obviously clear; the residual solid activated carbon (11% sugar content) in the filter press was sent to incineration.

Example 2

(1) Adding 500Kg of activated carbon (with sugar content of 18.7%) from the decolorization section into a dissolving kettle, adding 2700L of water into the dissolving kettle, heating to 45 ℃, and stirring for dissolving for 80 min;

(2) and (3) feeding the dissolved mixed solution into a filter press for filtering, returning the filtrate of the filter press into a dissolving kettle to form circulation, feeding 2000L (8.4 percent of sugar content) of the filter-pressed filtrate into a sugar water receiving tank after the filtrate is obviously clear, and feeding solid active carbon (9.6 percent of sugar content) for incineration.

Example 3

(1) Adding 500Kg of activated carbon (with sugar content of 19%) from a decoloring working section into a dissolving kettle, adding 4000L of water into the dissolving kettle, heating to 40 ℃, and stirring for dissolving for 100 min;

(2) and (3) feeding the dissolved mixed solution into a filter press for filtering, returning the filtrate of the filter press into a dissolving kettle to form circulation, feeding 2000L (with sugar content of 9%) of the filter-pressed filtrate into a sugar water receiving tank after the filtrate is obviously clear, and feeding solid active carbon (with sugar content of 10%) to be incinerated.

Claims

1. A method for recovering sugar liquor from activated carbon in a sucralose decoloration section is characterized by adopting the following devices:

the method comprises the following steps:

(2) sending the dissolved mixed solution into a filter press, returning the filtrate of the filter press into a dissolving kettle to form circulation, and sending the filtrate after filter pressing into a sugar water receiving tank after the filtrate is obviously clear; the residual solid activated carbon in the filter press is sent to incineration.

2. The method for recovering the sugar solution from the activated carbon at the sucralose decoloring section according to claim 1, which is characterized by comprising the following steps: and (3) when the sugar degree of the sugar water in the sugar water receiving tank in the step (2) is lower than 4%, pumping the sugar water back to the dissolving kettle.