Liquefied heat recovery device

Abstract

The utility model relates to the field of saccharification preparation equipment, and provides a liquefaction heat recovery device which comprises a liquefaction column discharge pump, a primary cooling heat exchanger, a secondary cooling heat exchanger and a storage tank, a first fluid medium pipeline is arranged at the other heat exchange end of the first-stage cooling heat exchanger, a second fluid medium pipeline is arranged at the other heat exchange end of the second-stage cooling heat exchanger, and the fluid medium temperature of the first fluid medium pipeline is larger than that of the second fluid medium pipeline. A shunting pipeline is arranged on the pipeline between the liquefaction column discharge pump and the first-stage cooling heat exchanger in a shunting manner; and a regulating valve is arranged on the pipeline between the inlet end of the shunting pipeline and the first-stage cooling heat exchanger. Liquefied fluid media are output through the liquefaction column discharging pump, and the purpose of water temperature heat exchange is achieved through the first-stage cooling heat exchanger and the second-stage cooling heat exchanger. And meanwhile, a shunting pipeline is also arranged at the outlet of the discharge pump of the liquefying column and is used for recycling high-temperature tail gas generated by liquefying, so that the tail gas recycling effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of sugar-making industry, in particular to a liquefaction heat recovery device. Background Art

[0002] The production process of starch sugar includes the selection of raw materials, stirring and mixing, liquefying starch, saccharification reaction, dehydration treatment and packaging and storage. The liquefied starch is to put the stirred and mixed starch slurry into a liquefier, and heat it to a certain temperature to make the starch undergo a certain gelatinization reaction, thereby becoming easier to obtain saccharification reaction. The saccharification reaction is to put the liquefied starch into a saccharification tank, add an appropriate amount of water, and then add an appropriate amount of saccharifying enzyme, and stir evenly. Under certain temperature and time conditions, the starch will be further decomposed into intermediate products such as glucose.

[0003] In the sugar-making process, temperature control is crucial, so it is managed through the delivery or adjustment of warm water, hot water or steam. However, in actual use, there will be problems with the emission of hot gas or exhaust gas. If there is too much gas, it will also affect the water delivery efficiency. Utility Model Content

[0004] The utility model aims to provide a liquefaction heat recovery device, aiming to improve the existing problems of high tail gas treatment cost and influence on pipeline transportation efficiency.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a liquefaction heat recovery device, comprising a liquefaction column discharge pump, a primary cooling heat exchanger, a secondary cooling heat exchanger and a storage tank; the liquefaction column discharge pump is connected to a heat exchange end of the primary cooling heat exchanger, a heat exchange end of the secondary cooling heat exchanger and the storage tank in sequence, the other heat exchange end of the primary cooling heat exchanger is provided with a first fluid medium pipeline, the other heat exchange end of the secondary cooling heat exchanger is provided with a second fluid medium pipeline, the fluid medium temperature of the first fluid medium pipeline is greater than the fluid medium temperature of the second fluid medium pipeline; a shunt pipeline is provided on the pipeline between the liquefaction column discharge pump and the primary cooling heat exchanger, and the shunt pipeline is connected to the pipeline between the storage tank and the secondary cooling heat exchanger, and a regulating valve is provided on the pipeline between the inlet end of the shunt pipeline and the primary cooling heat exchanger.

[0006] Preferably, a filter recovery pipe is provided on the diversion pipeline, and a first valve is provided on the filter recovery pipe.

[0007] Preferably, a spare pipeline is further included, wherein a first water outlet of the spare pipeline is arranged on the diversion pipeline, and a second water outlet of the spare pipeline is arranged on the pipeline between the storage tank and the secondary cooling heat exchanger.

[0008] Preferably, the liquefaction column discharge pump, the first-stage cooling heat exchanger and the second-stage cooling heat exchanger are provided in multiple groups, and the output end of each group of the second-stage cooling heat exchanger is connected in parallel to the storage tank, and the pipeline between each group of the liquefaction column discharge pump and the first-stage cooling heat exchanger is provided with a branch pipe connected to the diversion pipe, and a second valve is provided on the branch pipe.

[0009] Preferably, the input fluid medium temperature of the first fluid medium pipeline is equal to the output fluid medium temperature of the second fluid medium pipeline.

[0010] Preferably, the temperature of the input fluid medium of the second fluid medium pipeline is 40-50°C, and the temperature of the output fluid medium of the second fluid medium pipeline is 70-80°C.

[0011] Preferably, a check valve is provided on the pipeline between the storage tank and the secondary cooling heat exchanger.

[0012] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0013] 1. The liquefied fluid medium is output through the liquefaction column discharge pump, and the water temperature is heat exchanged through the primary cooling heat exchanger and the secondary cooling heat exchanger, that is, the water temperature of the primary cooling heat exchanger is heat exchanged to the secondary cooling heat exchanger. At the same time, a diversion pipeline is also set at the outlet of the liquefaction column discharge pump to recycle the high-temperature tail gas generated by liquefaction, forming a recycling effect, without the need to eliminate it through water circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the liquefaction heat recovery device described in the utility model;

[0015] Figure 2 It is a schematic diagram of a liquefaction heat recovery device of the utility model having multiple groups of liquefaction column discharge pumps, a primary cooling heat exchanger and a secondary cooling heat exchanger.

[0016] Description of reference numerals:

[0017] 10. Liquefaction column discharge pump; 101. Regulating valve;

[0018] 20. a first-stage cooling heat exchanger; 201. a first fluid medium pipeline;

[0019] 30. Secondary cooling heat exchanger; 301. Second fluid medium pipeline;

[0020] 40. Storage tank; 401. Check valve;

[0021] 50. diversion pipeline; 501. filter recovery pipe; 502. first valve;

[0022] 60, branch pipe; 601, second valve;

[0023] 70. Alternative pipeline. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0027] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0028] Example

[0029] Please refer to Figure 1As shown, this embodiment provides a liquefaction heat recovery device, including a liquefaction column discharge pump 10, a primary cooling heat exchanger 20, a secondary cooling heat exchanger 30 and a storage tank 40; the liquefaction column discharge pump 10 is connected to one heat exchange end of the primary cooling heat exchanger, one heat exchange end of the secondary cooling heat exchanger 30 and the storage tank 40 in sequence, the other heat exchange end of the primary cooling heat exchanger is provided with a first fluid medium pipeline 201, the other heat exchange end of the secondary cooling heat exchanger is provided with a second fluid medium pipeline 301, and the fluid medium temperature of the first fluid medium pipeline 201 is greater than the fluid medium temperature of the second fluid medium pipeline 301. A shunt pipeline 50 is provided on the pipeline between the liquefaction column discharge pump 10 and the primary cooling heat exchanger 20, and the shunt pipeline 50 is connected and provided on the pipeline between the storage tank 40 and the secondary cooling heat exchanger 30, and a regulating valve 101 is provided on the pipeline between the inlet end of the shunt pipeline 50 and the primary cooling heat exchanger 20.

[0030] When in use, liquefied water is output through the liquefied discharge pump. At this time, the water temperature of the liquefied water is relatively high, and it needs to be transported to the primary cooling heat exchanger 20 for heat exchange and cooling, and then transported to the secondary cooling heat exchanger 30 for secondary cooling, and the low-temperature water input into the secondary cooling heat exchanger 30 is heated and exchanged to achieve the required heat exchange operation. The water temperature of the liquefied water is relatively high, and it is cooled through secondary heat exchange, and then output to the storage tank 40 at a suitable temperature range.

[0031] After the heat exchange is completed, the liquefied water will be transported to the storage tank 40 for recycling. At the same time, the liquefied column discharge pump 10 is diverted through the shunt pipe 50 and directly transported to the input pipe of the storage tank 40. Specifically, by controlling the regulating valve 101 to close or open the output pipe of the liquefied column discharge pump 10, the flow rate of the shunt pipe 50 is adjusted. The temperature output by the liquefied column discharge pump 10 may not require heat exchange and cooling, that is, it meets the temperature range value input to the storage tank 40. Therefore, direct transportation can improve the transportation efficiency, and at the same time can reduce the use time of the cooling heat exchanger 20 and the secondary cooling heat exchanger 30, and correspondingly increase the service life. As for the high-temperature exhaust gas in the shunt pipe 50, it can be directly output or recovered through the pipeline.

[0032] Furthermore, if Figure 1 As shown, in this embodiment, a filter recovery pipe 501 is provided on the shunt pipe 50, and a first valve 502 is provided on the filter recovery pipe 501. The filter recovery pipe 501 is a membrane filtration recovery, and the high-temperature gas in the shunt pipe 50 is recovered to the storage tank 40 through the filter recovery pipe 501, so as to achieve the purpose of heat recovery.

[0033] like Figure 1 and Figure 2As shown, this embodiment also includes a spare pipeline 70, a first water outlet of the spare pipeline 70 is arranged on the shunt pipeline 50, and a second water outlet of the spare pipeline 70 is arranged on the pipeline between the storage tank 40 and the secondary cooling heat exchanger 30. The spare pipeline 70 may not be used at ordinary times, and may also be used to transport other waterways, such as tap water, production water or recycled water, or steam gas, and may provide cold water to adjust the temperature of the shunt pipeline 50, so as to improve the adaptability and practicality of the entire pipeline recovery.

[0034] like Figure 2 As shown, in this embodiment, multiple groups of liquefied column discharge pumps 10, primary cooling heat exchangers 20 and secondary cooling heat exchangers 30 are provided, and the output end of each group of secondary cooling heat exchangers 30 is connected in parallel to the storage tank 40, and the pipeline between each group of liquefied column discharge pumps 10 and the primary cooling heat exchanger 20 is provided with a branch pipe 60 connected to the diversion pipeline 50, and a second valve 601 is provided on the branch pipe 60. The multiple groups of settings can be adapted to the case of a recovery pipeline with multiple liquefied column discharge pumps 10, which can improve the operating efficiency of the entire pipeline and improve the adaptability of use.

[0035] In this embodiment, the input fluid medium temperature of the first fluid medium pipeline 201 is equal to the output fluid medium temperature of the second fluid medium pipeline 301. The fluid medium can be water or steam, and the water in the second fluid medium pipeline 301 is heated and then output through the secondary cooling heat exchanger 30, so as to realize the secondary cooling of the liquefied water output by the liquefaction column discharge pump 10, so as to achieve the purpose of more accurate water temperature transportation.

[0036] Furthermore, in this embodiment, the temperature of the input fluid medium of the second fluid medium pipeline 301 is 40-50°C, and the temperature of the output fluid medium of the second fluid medium pipeline 301 is 70-80°C, so that the temperature is increased to 70-80°C, preferably 75°C, by the secondary cooling heat exchanger 30. In this way, the temperature of the fluid medium input to the first fluid medium pipeline 201 also needs to be 70-80°C, or a higher temperature, to offset the heat loss during heat exchange, ensure the heat exchange temperature of the secondary cooling heat exchanger 30, and improve practicality.

[0037] like Figure 1 As shown, in this embodiment, a check valve 401 is provided on the pipeline between the storage tank 40 and the secondary cooling heat exchanger 30. After the check valve 401 is installed, the liquefied water can be prevented from flowing back into the secondary cooling heat exchanger 30. Specifically, the check valve 401 can be arranged between the second water outlet of the standby pipeline 70 and the diversion pipeline 50 to avoid interfering with the transportation of the diversion pipeline 50, and at the same time, the second water outlet of the standby pipeline 70 is restricted to achieve the purpose of avoidance.

[0038] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A liquefaction heat recovery device, characterized in that: It comprises a liquefaction column discharge pump (10), a primary cooling heat exchanger (20), a secondary cooling heat exchanger (30) and a storage tank (40); The liquefaction column discharge pump (10) is sequentially connected to a heat exchange end of the first-stage cooling heat exchanger, a heat exchange end of the second-stage cooling heat exchanger (30), and the storage tank (40); the other heat exchange end of the first-stage cooling heat exchanger is provided with a first fluid medium pipeline (201); the other heat exchange end of the second-stage cooling heat exchanger is provided with a second fluid medium pipeline (301); the fluid medium temperature of the first fluid medium pipeline (201) is greater than the fluid medium temperature of the second fluid medium pipeline (301); A diversion pipe (50) is arranged on the pipe between the liquefaction column discharge pump (10) and the primary cooling heat exchanger (20), and the diversion pipe (50) is connected to the pipe between the storage tank (40) and the secondary cooling heat exchanger (30), and a regulating valve (101) is arranged on the pipe between the inlet end of the diversion pipe (50) and the primary cooling heat exchanger (20).

2. The liquefaction heat recovery device according to claim 1, characterized in that: The diversion pipeline (50) is provided with a filter recovery pipe (501) for diversion, and the filter recovery pipe (501) is provided with a first valve (502).

3. The liquefaction heat recovery device according to claim 1 or 2, characterized in that: It also includes a spare pipeline (70), wherein a first water outlet of the spare pipeline (70) is arranged on the diversion pipeline (50), and a second water outlet of the spare pipeline (70) is arranged on the pipeline between the storage tank (40) and the secondary cooling heat exchanger (30).

4. The liquefaction heat recovery device according to claim 1, characterized in that: The liquefaction column discharge pump (10), the primary cooling heat exchanger (20) and the secondary cooling heat exchanger (30) are provided in multiple groups, and the output end of each group of the secondary cooling heat exchanger (30) is connected in parallel to the storage tank (40), and the pipeline between each group of the liquefaction column discharge pump (10) and the primary cooling heat exchanger (20) is provided with a branch pipe (60) connected to the diversion pipe (50), and the branch pipe (60) is provided with a second valve (601).

5. The liquefaction heat recovery device according to claim 1, characterized in that: The input fluid medium temperature of the first fluid medium pipeline (201) is equal to the output fluid medium temperature of the second fluid medium pipeline (301).

6. The liquefaction heat recovery device according to claim 1 or 5, characterized in that: The temperature of the input fluid medium of the second fluid medium pipeline (301) is 40-50°C, and the temperature of the output fluid medium of the second fluid medium pipeline (301) is 70-80°C.

7. The liquefaction heat recovery device according to claim 1, characterized in that: A check valve (401) is provided on the pipeline between the storage tank (40) and the secondary cooling heat exchanger (30).

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