CN217323920U

CN217323920U - Device for treating slag during glycerol production by utilizing biodiesel byproduct crude glycerol

Info

Publication number: CN217323920U
Application number: CN202220860213.1U
Authority: CN
Inventors: 叶活动; 陈建洪; 林泽虎
Original assignee: Longyan Zhuoyue Biobased Materials Co ltd
Current assignee: Longyan Zhuoyue Biobased Materials Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-30
Anticipated expiration: 2032-04-14

Abstract

The utility model discloses a treatment device for slag charge in the production of glycerin by using biodiesel byproduct crude glycerin, wherein the inlet of a pump No. 1 is connected with the bottom of a stirring kettle, and the outlet of the pump No. 1 is connected with a centrifuge No. 1; one outlet of the No. 1 centrifugal machine is connected to the impurity receiving tank through a pipeline with a valve, and the other outlet is divided into two paths which are respectively connected with the tops of the No. 1 heat preservation tank and the No. 2 heat preservation tank; a refrigerating fluid inlet and a refrigerating fluid outlet of the refrigerator are connected with two ends of a refrigerating inner side pipe which surrounds the No. 1 heat preservation tank and are connected with two ends of a refrigerating inner side pipe in the No. 2 heat preservation tank; the inlet of the No. 2 pump is connected with the tank bottoms of the two heat-preservation tanks, and the outlet of the No. 2 pump is connected with the inlet of the No. 2 centrifugal machine; one outlet of the No. 2 centrifugal machine is connected to a finished product receiving tank through a pipeline with a valve, the other outlet is divided into two paths, one path is connected to the stirring kettle through a circulating pipeline, and the other path is connected with the acidified enamel stirring kettle. The utility model discloses simple structure, convenient operation is high-efficient, can effectively extract the sodium sulfate salt, and glycerine is retrieved fully, and is pollution-free.

Description

Device for treating slag during glycerol production by utilizing biodiesel byproduct crude glycerol

Technical Field

The utility model relates to a production device technical field of organic chemical product glycerine, concretely relates to processing apparatus of slag charge when utilizing the crude glycerine of biodiesel accessory substance to produce glycerine.

Background

The method comprises the steps of producing glycerol by using biodiesel byproduct crude glycerol as a raw material, producing a large amount of sodium sulfate in the processes of oil removal, impurity removal and alkalization (adjusting the pH value to 11.0-11.5 by using concentrated sulfuric acid, neutralizing a small amount of grease or fatty acid in the crude glycerol to generate saponified substances and reducing the saponification equivalent of finished glycerol) through acidification (acidifying to the pH value of 1.5-1.8 by using concentrated sulfuric acid), dewatering the crude glycerol after the grease and the impurities are removed in an evaporation tower, and simultaneously increasing the salt content and the glycerol content of the dehydrated crude glycerol. The sodium sulfate salt is saturated and separated out in a large amount in a dehydrated crude glycerin system, but the consistency of the dehydrated crude glycerin is larger, so that the effect of separating the salt by adopting high-temperature centrifugation is better than that of separating the salt by precipitation, the salt, impurities and the like separated by the high-temperature centrifuge are collectively called centrifuge slag, and the centrifuge slag is dark brown and contains more sodium sulfate salt, glycerin, a small amount of impurities, pigments, saponified substances and the like; the residue obtained after the centrifugal liquid is subjected to reduced pressure distillation in the distillation tower contains more sodium sulfate salt and glycerin, and also contains part of polyglycerol, saponifiable matter, pigment, other organic matters and the like, and is called glycerin residue, and the centrifuge residue and the glycerin residue are collectively called residue. The slag can pollute the environment and is difficult to treat, and in order to better treat the problem of environmental pollution caused by the slag, a treatment device for the slag in the glycerol production by using the biodiesel byproduct crude glycerol is necessary to be developed so as to effectively extract sodium sulfate salt in the slag and fully recover the glycerol.

Disclosure of Invention

The utility model aims at providing a simple structure, convenient operation efficient utilize the processing apparatus of slag charge when biodiesel accessory substance coarse glycerine produces glycerine, make glycerine retrieve fully and effectively draw sodium sulfate as the accessory substance in the slag charge to reduce glycerine manufacturing cost, solve the environmental pollution problem when handling glycerine sediment and centrifuge sediment.

In order to realize the purpose, the utility model discloses utilize the 5m that the top was equipped with feed inlet 2 and inlet pipe 3 of slag charge's processing apparatus when biodiesel accessory substance crude glycerine produced glycerine including the top ³ Stirring kettle 1, pump No. 14, centrifuge No. 15, impurity receiving tank 6, refrigerator 7, 10m ³ No. 1 heat preservation tank 9, 10m ³ No. 2 heat preservation tank 10, 10m ³ The freezing inner side pipe 8 and 10m in the No. 1 heat preservation tank 9 ³ A refrigeration inside bypass pipe 8-1, a No. 2 pump 11, a No. 2 centrifuge 12, a finished product receiving tank 13, an acidified enamel stirring kettle 14 and a circulating pipe 15 are arranged in the No. 2 heat-preserving tank 10; the feed inlet 2 is used for feeding glycerol slag and centrifuge slag, and the feed pipe 3 is used for connecting tap water; the inlet of the No. 1 pump 4 is connected with a pump with the length of 5m ³ The bottom of the stirring kettle 1 is connected with a pipeline, and an outlet pipeline of a pump 4 No. 1 is connected with a centrifuge 5 No. 1; one outlet of the No. 1 centrifugal machine 5 is connected to the impurity receiving tank 6 through a pipeline with a valve, and the other outlet is divided into two paths which are respectively connected with 10m ³ Insulation tank No. 1 9 and 10m ³ The top of the insulated tank No. 2 10; the refrigerating fluid inlet and outlet of the refrigerating machine 7 are arranged around 10m ³ The two ends of a freezing inner and outer pipe 8 in the No. 1 heat preservation tank 9 are connected, and a freezing liquid inlet and a freezing liquid outlet of the refrigerator 7 are simultaneously connected with 10m ³ The two ends of a freezing inner side pipe 8-1 in the No. 2 heat preservation tank 10 are connected; the inlet of the No. 2 pump 11 is connected with the bottoms of the two heat-preservation tanks, and the outlet of the No. 2 pump 11 is connected with the inlet of the No. 2 centrifugal machine 12; one outlet of the No. 2 centrifugal machine 12 is connected to a finished product receiving tank 13 through a pipeline with a valve, the other outlet is divided into two paths, and one path is connected to a 5m centrifugal machine through a circulating pipe 15 ³ The stirring kettle 1 is connected with an acidified enamel stirring kettle 14 at the other path.

The purification treatment of the biodiesel byproduct crude glycerol is to adjust the PH value to 1.5-1.8 by using concentrated sulfuric acid, keep the temperature to remove grease and impurities, add liquid caustic soda to adjust the PH value to 11.0-11.5 (the purpose of adding the caustic soda is to reduce the saponification equivalent of the finished glycerol), generate a large amount of sodium sulfate during the purification, and generate a large amount of sodium sulfate through evaporation and dehydration, wherein the salt content of the centrifugal machine slag after high-temperature centrifugation is 65-70 percent, the glycerol content is 22-25 percent, and other substances are contained; glycerol slag is prepared by mixing the following components in percentage by mass: slag of a centrifugal machine: mixing and stirring the materials according to the proportion of 1:2:5.5 to dissolve the materials, centrifuging the materials after dissolution, removing impurities such as saponifiable matters and the like, freezing the materials again, rapidly reducing the solubility of sodium sulfate in a glycerol aqueous solution at the low temperature of 1 ℃, continuously precipitating the sodium sulfate, centrifuging the materials again when the solubility is stable, centrifugally separating the sodium sulfate, and further recrystallizing the sodium sulfate to obtain white sodium sulfate crystals; the centrifugate contains glycerol and sodium sulfate, and is recycled for diluting glycerol-free slag and heart machine slag; when the reaction is repeated for 2-3 times, the glycerol reaches a certain content, and the glycerol is pumped into an acidified enamel stirring kettle for recycling, is acidified and alkalized together with the raw material crude glycerol.

The device for treating the slag in the process of producing the glycerol by utilizing the biodiesel byproduct crude glycerol has the following technical characteristics and beneficial effects:

1. the problem of environmental pollution of glycerin slag and centrifuge slag is solved, and sodium sulfate can be effectively extracted, so that the method is a byproduct product and the benefit is increased;

2. the glycerol slag and the glycerol in the centrifugal machine slag are fully recovered, so that the cost is reduced;

3. simple structure and convenient operation.

Drawings

FIG. 1 is a schematic structural view of a device for processing the residue during the production of glycerin by using the biodiesel byproduct crude glycerin.

Reference numerals: 5m ³ Stirred tank 1, feed inlet 2, feed pipe 3, pump No. 14, centrifuge No. 15, impurity receiving tank 6, refrigerator 7, 10m ³ The freezing inner side pipe 8 and 10m in the No. 1 heat preservation tank 9 ³ 8-1 and 10m of freezing inner side pipe in No. 2 heat-insulating tank 10 ³ No. 1 heat preservation tank 9, 10m ³ The system comprises a No. 2 heat preservation tank 10, a No. 2 pump 11, a No. 2 centrifugal machine 12, a finished product receiving tank 13, an acidified enamel stirring kettle 14 and a circulating pipe 15.

Detailed Description

The heat exchanger for glycerin production according to the present invention is further described in detail with reference to the accompanying drawings and the following embodiments.

As shown in figure 1, the utility model discloses a 5m treatment device of slag charge when utilizing the crude glycerine of biodiesel by-product to produce glycerine includes that the top is equipped with feed inlet 2 and inlet pipe 3 ³ Stirring kettle 1, pump No. 14, centrifuge No. 15, impurity receiving tank 6, refrigerator 7, 10m ³ The freezing inner side pipe 8 and 10m in the No. 1 heat preservation tank 9 ³ 8-1 and 10m of freezing inner side pipe in No. 2 heat-insulating tank 10 ³ No. 1 heat preservation tank 9, 10m ³ A No. 2 heat preservation tank 10, a No. 2 pump 11, a No. 2 centrifuge 12, a finished product receiving tank 13, an acidified enamel stirring kettle 14 and a circulating pipe 15; the feeding port 2 is used for feeding glycerol slag and centrifuge slag, and the feeding pipe 3 is used for connecting tap water; the inlet of the No. 1 pump 4 is connected with a pump with the length of 5m ³ The bottom of the stirring kettle 1 is connected with a pipeline, and an outlet pipeline of a pump 4 No. 1 is connected with a centrifuge 5 No. 1; one outlet of the No. 1 centrifugal machine 5 is connected to the impurity receiving tank 6 through a pipeline with a valve, and the other outlet is divided into two paths which are respectively connected with 10m ³ Insulation tank No. 1 9 and 10m ³ The top of the insulated tank No. 2 10; the refrigerating fluid inlet and outlet of the refrigerating machine 7 are arranged around 10m ³ The two ends of a freezing inner and outer side pipe 8 in the No. 1 heat preservation tank 9 are connected and are simultaneously connected in parallel by 10m ³ A refrigerating inner side pipe 8-1 in the No. 2 heat preservation tank 10, so that refrigerating fluid of the refrigerator 7 can be switched according to actual production conditions; the inlet of the No. 2 pump 11 is connected with the tank bottoms of the two heat-preserving tanks, the outlet of the No. 2 pump 11 is connected with the inlet of the No. 2 centrifugal machine 12, so that water, a sodium sulfate crystal precipitate and the like in the heat-preserving tanks are conveyed to the No. 2 centrifugal machine 12 for centrifugation; one outlet of the No. 2 centrifugal machine 12 is connected to a finished product receiving tank 13 through a pipeline with a valve, the other outlet is divided into two paths, and one path is connected to a 5m centrifugal machine through a circulating pipe 15 ³ And the other path of the stirring kettle 1 is connected with an acidified enamel stirring kettle 14, and when the centrifuged liquid glycerol after being circulated for several times reaches a certain content, the centrifuged liquid glycerol is conveyed to the acidified enamel stirring kettle 14 by a pipeline for recycling, so that a complete glycerol slag recycling system is formed.

The specific operation flow of the treatment device for the slag in the glycerol production by using the biodiesel byproduct crude glycerol is as follows:

running water with a certain proportion enters 5m from the feeding pipe 3 of the running water through the pipeline ³ Starting the stirring kettle 1 for stirring; glycerol slag and glycerol centrifuge slag are added into a kettle through a feed inlet 2 under the condition of normal temperature, stirred and dissolved, and then conveyed to a No. 1 centrifuge 5 through a No. 1 pump 4 for centrifugation, and impurities such as saponifiable matter are removed and directly discharged to an impurity receiving tank 6; the centrifugate is sent to 10m ³ Insulation tank No. 1 9 and 10m ³ The number 2 heat preservation tank 10 is connected with the inner side pipe 8 of the number 1 heat preservation tank 9 and the inner side pipe 8-1 of the number 2 heat preservation tank 10 in parallel, the refrigerating fluid of the refrigerating machine 7 cools the solution in the two heat preservation tanks through the inner side pipe 8 of the number 1 heat preservation tank 9 and the inner side pipe 8-1 of the number 2 heat preservation tank 10, and the valve can intermittently control the temperature of 10m ³ Insulation tank No. 1 9 and 10m ³ The solution in the No. 2 heat preservation tank 10 is cooled and frozen, the treatment time is staggered, and the treatment is carried out alternately and orderly; the No. 2 pump 11 pumps 10m ³ Insulation tank No. 1 9 and 10m ³ The solution in the No. 2 heat-insulating tank 10 and the precipitated crystals are conveyed to a No. 2 centrifugal machine 12 for centrifugal separation, wherein the centrifuged sodium sulfate salt is directly discharged to a finished product receiving tank 13, and the other centrifugate is conveyed to 5m by a circulating pipe 15 ³ And the stirring kettle 1 is used for diluting the next kettle of the centrifugal machine slag, or directly conveying the centrifugate glycerol which is circulated for 2-3 times to the acidified enamel stirring kettle 14 through a pipeline to be acidified together with the crude glycerol raw material when the glycerol reaches a certain content, and recycling the glycerol.

Claims

1. The utility model provides a processing apparatus of slag charge when utilizing crude glycerine of biodiesel accessory substance production glycerine, characterized by: it comprises a feed inlet (2) and a feed pipe (3) arranged at the top of the device, and a feed pipe (5 m) ³ Stirred tank (1), No. 1 pump (4), No. 1 centrifuge (5), impurity receiving tank (6), refrigerator (7), 10m ³ No. 1 heat preservation tank (9) and 10m ³ No. 2 heat preservation tank (10) and 10m ³ A freezing inner side pipe (8) and a freezing inner side pipe (10 m) in the No. 1 heat preservation tank (9) ³ A freezing inner side pipe (8-1), a No. 2 pump (11), a No. 2 centrifuge (12), a finished product receiving tank (13), an acidified enamel stirring kettle (14) and a circulating pipe (15) in the No. 2 heat preservation tank (10); the feed inlet (2) is used for glycerol slag and centrifuge slagThe feeding pipe (3) is used for connecting tap water; the inlet of the No. 1 pump (4) and the length of the pump is 5m ³ The bottom of the stirring kettle (1) is connected with a pipeline, and an outlet pipeline of the No. 1 pump (4) is connected with a No. 1 centrifugal machine (5); one outlet of the No. 1 centrifugal machine (5) is connected to the impurity receiving tank (6) through a pipeline with a valve, and the other outlet is divided into two paths which are respectively connected with 10m ³ Insulation tank No. 1 (9) and 10m ³ The top of the No. 2 heat-preservation tank (10); the refrigerating fluid inlet and outlet of the refrigerating machine (7) are arranged around 10m ³ The two ends of a freezing inner and outer pipe (8) in the No. 1 heat preservation tank (9) are connected, and a freezing liquid inlet and a freezing liquid outlet of the freezer (7) are simultaneously connected with 10m ³ The two ends of a freezing inner side pipe (8-1) in the No. 2 heat preservation tank (10) are connected; the inlet of the No. 2 pump (11) is connected with the bottoms of the two heat-preservation tanks, and the outlet of the No. 2 pump (11) is connected with the inlet of the No. 2 centrifugal machine (12); one outlet of the No. 2 centrifugal machine (12) is connected to a finished product receiving tank (13) through a pipeline with a valve, the other outlet is divided into two paths, and one path is connected to 5m through a circulating pipe (15) ³ The stirring kettle (1) is connected with the other path of the acidified enamel stirring kettle (14).