Cleaning system for industrial glycine dirty materials by chloroacetic acid ammonolysis

Abstract

The utility model discloses a cleaning system for industrial glycine dirty materials by chloroacetic acid ammonolysis, which comprises a vibrating screening machine, a material dissolving tank, a clarifying tank and a crystallizing kettle which are sequentially connected through pipelines, the material dissolving tank is of a cylindrical structure, a stirring device is arranged in the material dissolving tank, a water inlet is arranged at the top of the material dissolving tank, a jacket is arranged on the outer side of the material dissolving tank, and the crystallizing kettle is arranged in the jacket. A steam inlet and a steam outlet are formed in the jacket, a liquid level transmitter and a temperature transmitter are arranged in the material melting tank, the bottom of the vibrating screen machine is connected with a feeding port of the material melting tank, a discharging port in the bottom of the material melting tank is connected with a feeding port in the top of the clarifying tank, and a filter is arranged on a connecting pipeline of the clarifying tank and the crystallization kettle. According to the method, different types of glycine dirty materials can be effectively cleaned, impurities in the different types of glycine dirty materials can be effectively removed, a pure glycine product is obtained, and recycling of resources is achieved.

Description

Technical Field

[0001] This utility model relates to the field of glycine preparation technology, and in particular to a clean system for industrial glycine waste produced by the ammonolysis of chloroacetic acid. Background Technology

[0002] Currently, glycine is an important amino acid with wide applications in many industries.

[0003] Food industry: As a food additive, it is used to improve flavor and texture; in pickling and brewing, it is used as an acidity corrector, buffer and preservative; it is also a vitamin C stabilizer and a component of monosodium glutamate.

[0004] In the pharmaceutical field: it is mainly used in research on amino acid metabolism drugs and nutritional infusions; it is also an important raw material for the synthesis of chlortetracycline buffer, anti-Parkinson's disease drug L-DOPA, vitamin B6, etc.

[0005] Industrial applications: Used as a pesticide intermediate (such as glyphosate), an additive for electroplating solutions, and a pH adjuster, and to improve the nutritional value of poultry and livestock feed in the feed industry.

[0006] Other applications include peptide synthesis, tissue culture medium preparation, and the detection of copper, gold, and silver. Due to its zwitterionic properties, it is often used to prepare buffer solutions.

[0007] Therefore, glycine has a wide range of applications and plays an important role in various fields.

[0008] In the industrial process of glycine production using the ammonolysis of chloroacetic acid, the feed may contain lumpy material during the drying process, resulting in carbonized material. Agglomeration may occur due to site humidity or contact with water during handling, known as "waterlogged material." Additionally, physical impurities such as packaging materials and dust are present, referred to as "ordinary dirty material." To improve product quality and reduce resource waste, effective treatment of these glycine materials containing impurities is necessary.

[0009] Currently, there is a lack of efficient and cost-effective processing methods on the market. Therefore, it is particularly urgent to develop a new low-cost and efficient dirty powder processing system. Utility Model Content

[0010] This invention aims to provide a cleaning system for industrial glycine contaminants produced by the ammonolysis of chloroacetic acid. It can effectively clean different types of glycine contaminants, effectively remove impurities from different types of glycine contaminants, obtain pure glycine products, and realize resource recycling.

[0011] To achieve the above-mentioned objectives, the technical solution of this utility model is as follows:

[0012] A cleaning system for industrial glycine waste from the ammonolysis of chloroacetic acid includes a vibrating screen, a chemical tank, a clarification tank, and a crystallization kettle connected in sequence by pipelines. The chemical tank has a cylindrical structure and is equipped with a stirring device. The top of the chemical tank has a water inlet, and the outside of the chemical tank is equipped with a jacket with a steam inlet and a steam outlet. A level transmitter and a temperature transmitter are installed inside the chemical tank. The bottom of the vibrating screen is connected to the inlet of the chemical tank, and the bottom outlet of the chemical tank is connected to the top inlet of the clarification tank. A filter is installed on the connecting pipeline between the clarification tank and the crystallization kettle.

[0013] The vibrating screen is a linear vibrating screen, and a funnel is provided at the bottom of the linear vibrating screen. The bottom of the funnel is connected to the feed inlet of the chemical tank.

[0014] The filter includes a primary filter and a secondary filter connected in sequence. The inlet of the primary filter is connected to the outlet of the clarification tank, the outlet of the primary filter is connected to the inlet of the secondary filter, and the outlet of the secondary filter is connected to the inlet of the crystallization vessel.

[0015] The primary filter is a basket filter, used to filter larger impurities.

[0016] The secondary filter is a bag filter used to filter out minute impurities.

[0017] The filter bag of the bag filter has a pore size of 1µm.

[0018] The bag filter is equipped with a pressure sensor to monitor the filter status.

[0019] Two sets of primary and secondary filters are provided, and the two sets of primary and secondary filters are connected in parallel. One set is used as a spare for easy replacement of the filter element.

[0020] The outlet of the crystallization kettle is connected to a centrifuge, and the outlet of the centrifuge is connected to the glycine mother liquor treatment and drying process via a pipeline.

[0021] The beneficial effects of this utility model are:

[0022] 1. In this invention, glycine impurities are removed by a linear vibrating screen and then fed into a chemical tank. Different purifying agents are added according to the type of glycine impurities, and the mixture is heated to dissolve. After dissolution, the mixture is passed into a clarification tank, allowed to stand, and then filtered through a filter. After filtration, the mixture is crystallized in a crystallization kettle. After crystallization, the discharge valve of the crystallization kettle is opened, and the mixture is centrifuged to obtain crude glycine and centrifugal mother liquor. The crude glycine is dried after passing quality testing to obtain the finished glycine. The centrifugal mother liquor is recycled after pretreatment of wastewater. This purification process removes various impurities from the impurities, resulting in a qualified product with a purity of up to 98.5%.

[0023] 2. In this invention, the pretreatment of the centrifuged mother liquor for wastewater is carried out using electrodialysis. The separated concentrated liquid is an ammonium chloride solution, and the dilute liquid is a low-concentration glycine solution. The ammonium chloride solution is sent to the evaporation system to produce more ammonium chloride, while the dilute liquid is returned to the clarification reactor for reuse. During the feed preparation process, the water is replenished from the evaporation cooling water of the ammonium chloride and the process water, achieving recycling. This enables clean production with virtually no wastewater generation.

[0024] 3. In this utility model, effective cleaning can be achieved for different types of glycine contaminants, effectively removing impurities from different types of glycine contaminants to obtain pure glycine products, thus realizing resource recycling. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the clean system structure for industrial glycine waste materials produced by the ammonolysis of chloroacetic acid according to this utility model.

[0026] The components include: 1. Feeding tank; 2. Clarification tank; 3. Crystallization kettle; 4. Centrifuge; 5. Primary filter; and 6. Secondary filter. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0028] Example 1

[0029] This embodiment provides a cleaning system for industrial glycine waste materials produced by ammonolysis of chloroacetic acid. The system includes a vibrating screen, a chemical tank 1, a clarification tank 2, and a crystallization kettle 3, connected sequentially by pipes. The chemical tank 1 is cylindrical and contains a stirring device. A water inlet is located at the top of the chemical tank 1, and a jacket is provided on the outside of the chemical tank 1, with a steam inlet and a steam outlet. A level transmitter and a temperature transmitter are installed inside the chemical tank 1. The bottom of the vibrating screen is connected to the inlet of the chemical tank 1, and the bottom outlet of the chemical tank 1 is connected to the top inlet of the clarification tank 2. A filter is installed on the connecting pipe between the clarification tank 2 and the crystallization kettle 3.

[0030] In this embodiment, the glycine contaminant is carbonized material, and the cleaning of the glycine contaminant is completed through the following steps:

[0031] S1. Open the steam condensate feed valve of chemical tank 1, add water to the level of 1500-1650mm and start the stirring device. At the same time, use steam heating to control the temperature at 65-90℃.

[0032] S2. Use an overhead crane to feed the dirty material into a linear vibrating screen for initial impurity removal and refinement of lumpy material. The dirty material after screening is fed into the chemical tank 1 through the bottom pipe using potential energy. Then, add 0.5‰ activated carbon by the mass of the solution and stir to dissolve.

[0033] S3. Stop stirring when the glycine mixture has completely dissolved after stirring for 60 minutes.

[0034] S4. Open the bottom valve of chemical tank 1 and transfer the solution to clarification tank 2;

[0035] S5. After filtration, the mixture is fed into crystallization kettle 3 for cooling and crystallization.

[0036] S6. After the temperature of crystallization vessel 3 drops to 22-25℃, glycine product is obtained by crystallization.

[0037] Example 2

[0038] The difference between this embodiment and embodiment 1 is that, in this embodiment, the vibrating screen is a linear vibrating screen, and a funnel is provided at the bottom of the linear vibrating screen, with the bottom of the funnel connected to the feed inlet of the chemical tank 1; the rest of the structure is the same as in embodiment 1.

[0039] In this embodiment, the linear vibrating screen is model SZF1225, with a single-layer screen surface, a particle size of 2mm, an amplitude of 5mm, and a screen surface size of 1200mm*2500mm.

[0040] In this embodiment, the glycine contaminant is a water-soaked material, and the cleaning of the glycine contaminant is completed through the following steps:

[0041] S1. Open the steam condensate feed valve of chemical tank 1, add water to the level of 1500-1650mm and start the stirring device. At the same time, use steam heating to control the temperature at 65-90℃.

[0042] S2. Use an overhead crane to feed the dirty material into a linear vibrating screen for initial impurity removal and refinement of lumpy material. The dirty material after screening is fed into the chemical tank 1 through the bottom pipe using potential energy. Then add 1‰ activated carbon by the mass of the solution and stir to dissolve.

[0043] S3. After stirring for 60 minutes, add 0.1‰ of the solution mass of polyaluminum chloride, stir again for 10 minutes, and then stop stirring.

[0044] S4. Open the bottom valve of the chemical tank 1 and transfer the solution to the clarification tank 2 to settle for 30 minutes;

[0045] S5. After filtration, the mixture is fed into crystallization kettle 3 for cooling and crystallization.

[0046] S6. After the temperature of crystallization vessel 3 drops to 22-25℃, glycine product is obtained by crystallization.

[0047] Example 3

[0048] Compared with Example 1, the difference in this embodiment is that the filter in this embodiment includes a primary filter 5 and a secondary filter 6 connected in sequence. The inlet of the primary filter 5 is connected to the outlet of the clarifier 2, the outlet of the primary filter 5 is connected to the inlet of the secondary filter 6, and the outlet of the secondary filter 6 is connected to the inlet of the crystallizer 3. The primary filter 5 is a basket filter used to filter larger impurities; the secondary filter 6 is a bag filter used to filter small impurities; the filter bag pore size of the bag filter is 1µm; a pressure sensor is installed inside the bag filter to monitor the filter status; two sets of primary filters 5 and two sets of secondary filters 6 are provided, and the two sets of primary filters 5 and secondary filters 6 are connected in parallel. One set is used as a spare for easy replacement of the filter element; the rest of the structure is the same as in Example 1.

[0049] In this embodiment, the glycine contaminant is a water-soaked material, and the cleaning of the glycine contaminant is completed through the following steps:

[0050] S1. Open the steam condensate feed valve of chemical tank 1, add water to the level of 1500-1650mm and start the stirring device. At the same time, use steam heating to control the temperature at 65-90℃.

[0051] S2. Use an overhead crane to feed the dirty material into a linear vibrating screen for initial impurity removal and refinement of lumpy materials. The dirty material after screening is fed into the chemical tank 1 through the bottom pipe using potential energy. Then, add 0.1‰ polyaluminum chloride solution and stir to dissolve.

[0052] S3. Stop stirring when the glycine mixture has completely dissolved after stirring for 10 minutes.

[0053] S4. Open the bottom valve of chemical tank 1 and transfer the solution to clarification tank 2;

[0054] S5. After being filtered by the primary filter 5, the product is pumped through the secondary filter 6 and then pumped into the crystallization kettle 3 for cooling and crystallization.

[0055] S6. After the temperature of crystallization vessel 3 drops to 22-25℃, glycine product is obtained by crystallization.

[0056] Example 4

[0057] The difference between this embodiment and embodiment 1 is that, in this embodiment, the outlet of the crystallization kettle 3 is connected to a centrifuge 4, and the outlet of the centrifuge 4 is connected to the glycine mother liquor treatment and drying process through a pipeline. The rest of the structure is the same as in embodiment 1.

[0058] In this embodiment, after the glycine crystallizes in the crystallization vessel 3, the discharge valve of the crystallization vessel 3 is opened, and the solution enters the centrifuge 4 for centrifugation to obtain crude glycine and centrifugation mother liquor. After the crude glycine passes the test, it is dried to obtain the finished glycine. The centrifugation mother liquor is reused after pretreatment of sewage. The finished glycine obtained in this embodiment has a content of more than 98.5%, which meets the qualified standard for glycine products.

[0059] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A cleaning system for chloroacetic acid ammonolysis process industrial glycine waste, characterized by: Including the vibration screen machine, the material preparation tank (1), the clarification tank (2) and the crystallization kettle (3) are connected in turn by pipeline, the material preparation tank (1) is cylindrical structure, the material preparation tank (1) is provided with stirring device, the material preparation tank (1) top is equipped with water inlet, the material preparation tank (1) outside is equipped with the jacket, the jacket is equipped with steam inlet and steam outlet, the material preparation tank (1) is provided with liquid level transmitter and temperature transmitter, the vibration screen machine bottom is connected with the material preparation tank (1) feed inlet, the material preparation tank (1) top is equipped with water inlet, the material preparation tank (1) bottom discharge port is connected with the clarification tank (2) top feed inlet, the clarification tank (2) and the crystallization kettle (3) are provided with filter on the connecting pipeline.

2. The system for cleaning the waste of industrial glycine according to claim 1, wherein: The vibration screen machine is linear vibration screen machine, and the funnel is arranged at the bottom of the linear vibration screen machine, and the funnel bottom is connected with the material preparation tank (1) feed inlet.

3. The cleaning system for industrial glycine waste from the ammonolysis of chloroacetic acid according to claim 1, characterized in that: The filter includes a primary filter (5) and a secondary filter (6) connected in turn, the primary filter (5) feed inlet is connected with the clarification tank (2) discharge port, the primary filter (5) discharge port is connected with the secondary filter (6) feed inlet, and the secondary filter (6) discharge port is connected with the crystallization kettle (3) feed inlet.

4. The system for cleaning the waste of industrial glycine production by ammonolysis of chloroacetic acid according to claim 3, characterized in that: The primary filter (5) is a basket filter.

5. The cleaning system for industrial glycine waste from the ammonolysis of chloroacetic acid according to claim 3, characterized in that: The secondary filter (6) is a bag filter, and the filter bag aperture of the bag filter is 1um.

6. The cleaning system for industrial glycine waste from the ammonolysis of chloroacetic acid according to claim 5, characterized in that: The bag filter is provided with a pressure sensor.

7. The system for cleaning of crude glycine according to claim 3, wherein the system comprises: The primary filter (5) and the secondary filter (6) are provided with two sets respectively, and the two sets of primary filter (5) and secondary filter (6) are connected in parallel respectively.

8. The system for cleaning of crude glycine according to claim 1, wherein the system comprises: The crystallization kettle (3) outlet is connected with a centrifuge (4), and the centrifuge (4) outlet is connected with a glycine mother liquor treatment and drying process through a pipeline.

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