Cold and hot water system for cellulose glucose crystallization

Abstract

The utility model relates to the technical field of cellulose glucose, in particular to a cold and hot water system for cellulose glucose crystallization, which comprises a cold and hot water tank, a heat exchanger and a crystallizer. A water inlet pipe and a steam inlet pipe are arranged on the cold and hot water tank, an LICA instrument and a TICA instrument are arranged on a tank body, and a water outlet pipe and a water drainage pipe are arranged at the bottom of the cold and hot water tank; a first electric valve is arranged on the water inlet pipe, a third electric valve is arranged on the water drainage pipe, and the LICA instrument is matched with the first electric valve and the third electric valve for linkage, so that the liquid level in the tank body is controlled; the water outlet pipe is connected with the heat exchanger and is connected with the crystallizer after passing through the heat exchanger, and the crystallizer backwater is connected with the upper part of the cold and hot water tank through a water return pipe; a refrigerant pipeline used for heat exchange is arranged at the position of the heat exchanger, a fourth electric valve is installed on a refrigerant inlet pipe, a second electric valve is installed on a steam inlet pipe, and the TICA instrument is matched with the second electric valve and the fourth electric valve to conduct fine control over the temperature of circulating water.

Description

Technical Field

[0001] The utility model relates to the technical field of cellulose glucose, in particular to a cold and hot water system for cellulose glucose crystallization. Background Art

[0002] Cellulosic glucose is different from traditional starch glucose. It is a non-food bio-based glucose obtained by enzymatic hydrolysis of waste plant fibers from crops. It effectively solves the problem of "competing with people for food and competing with livestock for feed" and carbon emissions, and plays a positive and beneficial role in solving food security and environmental problems.

[0003] Cellulose glucose is an extract of plant fiber. During the enzymatic hydrolysis process, it will produce xylose, arabinose, mannose and other miscellaneous sugars, which account for about 10% of the total sugar. The traditional chromatographic separation process can separate them to obtain relatively pure glucose, but it also causes an increase in production costs and equipment investment, which is not conducive to industrial production. However, the presence of these miscellaneous sugars will affect the crystallization of cellulosic glucose; the traditional glucose crystallization process will cause the glucose crystals to be too fine or form crystal clusters with impurities. Industrial verification shows that the glucose content can only reach 95% or even lower, and high-quality cellulosic glucose cannot be obtained.

[0004] It is found in industrial production that the quality of cellulose glucose is closely related to the temperature control during the crystallization process. The crystal size and content of cellulose glucose can be effectively improved by uniformly controlling the temperature during the insulation and cooling stages of the crystallization process. For this reason, we proposed a hot and cold water system for cellulose glucose crystallization, which can finely control the temperature throughout the cellulose glucose crystallization process to ensure product quality. Utility Model Content

[0005] The purpose of the utility model is to provide a hot and cold water system for cellulose glucose crystallization in view of the deficiencies of the above-mentioned prior art, so as to achieve fine control of temperature during the process of cellulose glucose crystallization, and to achieve the purposes of constant temperature insulation, uniform cooling and multi-stage cooling and insulation.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hot and cold water system for cellulose glucose crystallization, comprising a hot and cold water tank, wherein the hot and cold water tank is connected to a heat exchanger, and the heat exchanger is connected to a crystallizer; a water inlet pipe and a steam inlet pipe are arranged above the hot and cold water tank, a drain pipe and a water outlet pipe are arranged below the hot and cold water tank, the water outlet pipe is connected to the heat exchanger, the water outlet pipe is connected to the circulating water inlet of the crystallizer after passing through the heat exchanger, and the circulating water outlet of the crystallizer is connected to the top of the hot and cold water tank through a return pipe.

[0007] Further, the water outlet pipe is connected to the inlet of the cold and hot water pump, the outlet of the cold and hot water pump is connected to the hot water inlet pipe, the hot water inlet pipe is connected to the heat exchanger, the hot water inlet pipe is connected to the hot water outlet pipe after passing through the heat exchanger, and the hot water outlet pipe is connected to the circulating water inlet of the crystallizer.

[0008] Further, a check valve is installed on the hot water inlet pipe.

[0009] Further, the heat exchanger is also connected to a refrigerant inlet pipe and a refrigerant outlet pipe, and heat exchange occurs between the refrigerant and the hot water in the heat exchanger.

[0010] Further, heat insulation layers are provided on the water outlet pipe, the hot water inlet pipe, the hot water outlet pipe, the refrigerant inlet pipe, and the refrigerant outlet pipe.

[0011] Further, a liquid level indicating control alarm instrument is installed on the tank body of the cold and hot water tank, a first electric valve is installed on the water inlet pipe, a third electric valve is installed on the drain pipe, the liquid level indicating control alarm instrument is connected to the PLC, and the PLC is respectively connected to the first electric valve and the third electric valve.

[0012] Further, a temperature indicating control alarm instrument is installed on the tank body of the cold and hot water tank, a second electric valve is installed on the steam inlet pipe, a fourth electric valve is installed on the refrigerant inlet pipe, the temperature indicating control alarm instrument is connected to the PLC, and the PLC is respectively connected to the second electric valve and the fourth electric valve.

[0013] Advantages of the utility model:

[0014] 1. Through the LICA instrument, in cooperation with the first electric valve on the water inlet pipe and the third electric valve on the drain pipe, stable control of the liquid level in the cold and hot water tank is achieved, ensuring the flow rate of the circulating water, which plays a positive role in ensuring the stability of the cold and hot water system and its low-energy consumption operation;

[0015] 2. By setting up a heat exchanger, and the fourth electric valve on the refrigerant inlet pipe of the heat exchanger and the second electric valve on the steam inlet pipe, fine control of the water temperature can be achieved. During the long-term heat preservation and uniform cooling process in the crystallization process, accurate control of temperature control and change can be ensured, thus playing a positive and beneficial role in ensuring the quality of the product. Description of the drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the utility model.

[0017] Names corresponding to each mark in the figure:

[0018] 1. Cold and hot water tank; 11. Water inlet pipe; 111. First electric valve; 12. Steam inlet pipe; 121. Second electric valve; 13. Water outlet pipe; 14. Return water pipe; 15. Drain pipe; 151. Third electric valve; 16. Liquid level indicating control alarm instrument; 17. Temperature indicating control alarm instrument; 2. Cold and hot water pump; 3. Heat exchanger; 31. Hot water inlet pipe; 311. Check valve; 32. Hot water outlet pipe; 33. Refrigerant inlet pipe; 331. Fourth electric valve; 34. Refrigerant outlet pipe; 4. Thermal insulation layer; 5. Crystallizer; 51. Circulating water inlet; 52. Circulating water outlet. Detailed implementation mode

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0020] Embodiment of the present invention:

[0021] As Figure 1 shown, in the cold and hot water system of this embodiment, a cold and hot water tank 1 is provided. A water inlet pipe 11 and a steam inlet pipe 12 are provided on the cold and hot water tank 1. A first electric valve 111 is installed on the water inlet pipe 11, and a second electric valve 121 is installed on the steam inlet pipe 12; and a water outlet pipe 13 and a drain pipe 15 are provided at the bottom of the cold and hot water tank 1, and a return water pipe 14 is provided above the cold and hot water tank 1. The water outlet pipe 13 is connected to the cold and hot water pump 2, and a third electric valve 151 is installed on the drain pipe 15.

[0022] A liquid level indicating control alarm instrument (LICA) 16 is installed on the tank body of the cold and hot water tank 1. The liquid level indicating control alarm instrument 16 is linked with the first electric valve 111 and the third electric valve 151 respectively through a PLC.

[0023] The cold and hot water pump 2 is connected to the hot water inlet pipe 31. The hot water inlet pipe 31 is connected to the plate heat exchanger 3. A check valve 311 is installed on the hot water inlet pipe 31. A hot water outlet pipe 32, a refrigerant inlet pipe 33 and a refrigerant outlet pipe 34 are also connected to the plate heat exchanger 3. A fourth electric valve 331 is installed on the refrigerant inlet pipe 33.

[0024] A temperature indicating control alarm instrument (TICA) 17 is also installed on the tank body of the cold and hot water tank 1. The temperature indicating control alarm instrument 17 is linked with the second electric valve 121 and the fourth electric valve 331 respectively through a PLC.

[0025] Heat insulation layers 4 are provided on the steam inlet pipe 12, the hot water inlet pipe 31, the hot water outlet pipe 32, the refrigerant inlet pipe 33 and the refrigerant outlet pipe 34.

[0026] The hot water outlet pipe 32 is connected to the circulating water inlet 51 of the crystallizer 5, and the circulating water outlet 52 of the crystallizer 5 is connected to the return pipe 14.

[0027] The principle of the present utility model is as follows:

[0028] During the use of the present utility model, long-term, fine and stable regulation of the crystallization temperature in the crystallizer 5 can be achieved.

[0029] During the use process, primary water is added to the cold and hot water tank 1 through the water inlet pipe 11, and steam is introduced through the steam inlet pipe 12 to heat the primary water in the cold and hot water tank 1; during this process, the liquid level in the cold and hot water tank 1 is controlled by the liquid level indicating control alarm instrument 16, and the temperature is controlled by the temperature indicating control alarm instrument 17, so as to ensure the stability of the liquid level and temperature. During the process, the liquid level indicating control alarm instrument 16 and the temperature indicating control alarm instrument 17 are mature instruments in the industry, including a control box, a transmitter, a display instrument, a sound and light alarm component, etc. Since they are existing mature instruments, it is not difficult for those skilled in the art to understand, and their structural principles will not be elaborated here.

[0030] After the primary water in the cold and hot water tank 1 is heated, it is pumped to the heat exchanger 3 through the outlet pipe 13 at the bottom by the cold and hot water pump 2 for heat exchange. The function of the heat exchanger 3 is to achieve fine regulation of the water temperature (by regulating the flow rate of the refrigerant. When the temperature is too high, the refrigerant flow rate is increased to take away the excess heat. When the temperature is too low, the refrigerant flow rate is reduced for temperature compensation). Through the linkage of the second electric valve 121 on the steam inlet pipe 12 and the fourth electric valve 331 on the refrigerant inlet pipe 33, the stability of the water temperature can be ensured for a long time, the water temperature fluctuation can be reduced, and a uniform cooling process and a staged cooling and heat preservation process can be realized during the crystallization process, which plays a positive and beneficial role in ensuring the particle size of the product after crystallization.

[0031] The circulating water passing through the crystallizer 5 flows back to the cold and hot water tank 1 through the return pipe 14, and the inlet water volume is recycled. During the use process, when the water level in the cold and hot water tank 1 is too high, a part of the water can be discharged through the drain pipe 15 at the bottom.

Claims

1. A cold and hot water system for cellulose glucose crystallization, characterized in that: The invention comprises a hot and cold water tank (1), wherein the hot and cold water tank (1) is connected to a heat exchanger (3), and the heat exchanger (3) is connected to a crystallizer (5); a water inlet pipe (11) and a steam inlet pipe (12) are arranged above the hot and cold water tank (1), a drainage pipe (15) and a water outlet pipe (13) are arranged below the hot and cold water tank (1), the water outlet pipe (13) is connected to the heat exchanger (3), the water outlet pipe (13) is connected to a circulating water inlet (51) of the crystallizer (5) after passing through the heat exchanger (3), and the circulating water outlet (52) of the crystallizer (5) is connected to the top of the hot and cold water tank (1) through a return pipe (14).

2. A cold and hot water system for cellulose glucose crystallization according to claim 1, characterized in that: The water outlet pipe (13) is connected to the inlet of the hot and cold water pump (2), the outlet of the hot and cold water pump (2) is connected to the hot water inlet pipe (31), the hot water inlet pipe (31) is connected to the heat exchanger (3), the hot water inlet pipe (31) is connected to the hot water outlet pipe (32) after passing through the heat exchanger (3), and the hot water outlet pipe (32) is connected to the circulating water inlet (51) of the crystallizer (5).

3. A cold and hot water system for cellulose glucose crystallization according to claim 2, characterized in that: A check valve (311) is installed on the hot water inlet pipe (31).

4. A cold and hot water system for cellulose glucose crystallization according to claim 2, characterized in that: The heat exchanger (3) is also connected to a refrigerant inlet pipe (33) and a refrigerant outlet pipe (34), and the refrigerant and hot water exchange heat in the heat exchanger (3).

5. A cold and hot water system for cellulose glucose crystallization according to claim 4, characterized in that: The water outlet pipe (13), the hot water inlet pipe (31), the hot water outlet pipe (32), the refrigerant inlet pipe (33) and the refrigerant outlet pipe (34) are all provided with a thermal insulation layer (4).

6. A cold and hot water system for cellulose glucose crystallization according to claim 2, characterized in that: A liquid level indicating control alarm instrument (16) is installed on the tank body of the hot and cold water tank (1), a first electric valve (111) is installed on the water inlet pipe (11), and a third electric valve (151) is installed on the drain pipe (15). The liquid level indicating control alarm instrument (16) is connected to a PLC, and the PLC is respectively connected to the first electric valve (111) and the third electric valve (151).

7. A cold and hot water system for cellulose glucose crystallization according to claim 4, characterized in that: A temperature indicating control alarm instrument (17) is installed on the tank body of the hot and cold water tank (1), a second electric valve (121) is installed on the steam inlet pipe (12), and a fourth electric valve (331) is installed on the refrigerant inlet pipe (33). The temperature indicating control alarm instrument (17) is connected to a PLC, and the PLC is connected to the second electric valve (121) and the fourth electric valve (331), respectively.

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