A device for recycling steam condensate in dextran production

Abstract

The utility model relates to steam condensate water recycling technical field provides a kind of steam condensate water recycling device in dextran production, including condensate tank and circulating tank, the condensate tank and circulating tank lower end are provided with support frame to support, circulating pump group is installed between the condensate tank and circulating tank, prefilter is installed in the condensate tank input end, the prefilter is connected with steam condensate water input pipe, the circulating tank is connected with IC tower circulating water;Heat exchange mechanism is provided in the condensate tank, the circulating tank is circulated with heat exchange mechanism by circulating pump group, export is carried out to condensate water by condensate tank, heat exchange is carried out between circulating water in IC tower and condensate water by heat exchange mechanism, realize waste heat utilization, exchange residual in condensate water to circulating water in IC tower, to carry out the function of heat supplement to IC tower, so that IC tower operation is more stable.

Description

Technical Field

[0001] This utility model relates to the field of steam condensate reuse technology, and in particular to a steam condensate reuse device in dextran production. Background Technology

[0002] In the production of dextran, crystallization is carried out using crystallizers and drying is carried out using vacuum dryers. Steam is used to heat and maintain the temperature of both the crystallizers and the dryers. After the steam is used up, the resulting steam condensate has a high temperature, but it is directly discharged into the environmental protection center's equalization tank as wastewater.

[0003] However, in the low-temperature environment of spring and autumn, the heat loss coefficient of the dextran system increases significantly, resulting in insufficient operating temperature of the IC tower and a decrease in the thermal efficiency of the device. This leads to a decrease in the operating efficiency of the IC tower. Furthermore, the discharge of high-temperature condensate generated during the production process will cause waste of heat. Therefore, the recovery and reuse of steam condensate in dextran production is of great importance for energy conservation and environmental protection. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a steam condensate reuse device in dextran production, which solves the problems of insufficient inlet air temperature and low working efficiency of the IC tower in existing technologies.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for reusing steam condensate in dextran production, comprising a condensate tank and a circulation tank, wherein a circulation pump group is installed between the condensate tank and the circulation tank, a pre-filter is installed at the input end of the condensate tank, and the circulation tank is used to supply water to the IC tower; The condensate tank is equipped with a heat exchange mechanism, which includes multiple uniformly distributed heat exchange plates fixedly connected inside the condensate tank. Alternating condensate flow chambers and circulating water flow chambers are formed between the heat exchange plates. The condensate flow chambers are connected to a pre-filter, and the upper part of the circulating water flow chambers is connected to a circulating pump group, while the lower part is connected to the circulating tank through a pipeline.

[0006] The circulating tank circulates water through a circulating pump unit and a heat exchange mechanism. Condensate is discharged through a steam condensate tank. The heat exchange mechanism allows for heat exchange between the circulating water and the steam condensate within the IC tower, enabling the secondary utilization of waste heat. Residual heat in the condensate is transferred to the circulating water within the IC tower, thus supplementing the IC tower's heat supply. This utilizes the residual heat in the condensate and makes the IC tower's operation more stable. The heat exchange is achieved using alternating condensate and circulating water flow chambers, resulting in a simple structure, high heat exchange efficiency, and ease of retrofitting existing equipment.

[0007] Preferably, the heat exchange plate is provided with a condensate flow hole and a circulating water flow hole. The condensate flow hole is connected to the condensate flow cavity, and the circulating water flow hole is connected to the circulating water flow cavity. A first connecting pipe and a second connecting pipe are provided between adjacent heat exchange plates. The first connecting pipe is connected to the condensate flow hole, and the second connecting pipe is connected to the circulating water flow hole.

[0008] Preferably, a water receiving tray is provided on the inner side of the upper part of the circulation tank, and the water receiving tray is connected to the water inlet of the circulation pump unit through a pipeline; The circulating tank is also equipped with an overflow pipe, the upper end of which passes through the water receiving tray.

[0009] Preferably, a partition is fixedly connected inside the pre-filter, dividing the pre-filter into two chambers. A first filter element and a spare filter element are installed in each chamber, respectively. A switching valve is installed at the input end of the pre-filter, with its two outlets located at the upper ends of the two chambers. This dual-chamber, dual-flow-channel design allows for filter element replacement without stopping the system, improving the operational stability of the device.

[0010] Preferably, the pre-filter is equipped with a disassembly door at both the first filter element and the spare filter element, allowing the filter elements inside the device to be replaced through the disassembly door.

[0011] Preferably, both the first and backup filter elements are made of glass fiber. This not only traps dissolved iron ions but also dextran colloids and bacterial fragments, thereby reducing heat exchange plate corrosion, extending the device's lifespan, and providing a post-treatment filtration process for the condensate, reducing the difficulty of subsequent processing.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This invention enables heat exchange between the circulating water and condensate in the IC tower through a heat exchange mechanism, thereby achieving the function of secondary utilization of waste heat. It exchanges the residual heat in the condensate with the circulating water in the IC tower, thus supplementing the heat of the IC tower. This not only utilizes the residual heat in the condensate, but also makes the operation of the IC tower more stable. Attached Figure Description

[0013] Figure 1 A three-dimensional structural schematic diagram of a steam condensate recycling device in dextran production provided by this utility model; Figure 2 A front view of a steam condensate recycling device in dextran production provided by this utility model; Figure 3 A cross-sectional view of a steam condensate recycling device in dextran production provided by this utility model; Figure 4This utility model provides a device for reusing steam condensate in the production of dextran. Figure 3 Enlarged view of a portion of point A in the middle.

[0014] Legend: 1. Condensate tank; 2. Circulation tank; 3. Support frame; 4. Circulation pump set; 5. Pre-filter; 6. Disassembly door; 9. First connecting pipe; 10. Second connecting pipe; 11. Partition plate; 12. First filter element; 13. Spare filter element; 14. Condensate flow chamber; 15. Circulation water flow chamber. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-2 This utility model provides a technical solution: a device for reusing steam condensate in dextran production, including a condensate tank 1 and a circulation tank 2. The lower ends of the condensate tank 1 and the circulation tank 2 are supported by a support frame 3. A circulation pump group 4 is installed between the condensate tank 1 and the circulation tank 2. A pre-filter 5 is installed at the input end of the condensate tank 1. The pre-filter 5 is connected to the steam condensate input pipe. The circulation tank 2 is connected to the IC tower circulating water. The condensate tank 1 is equipped with a heat exchange mechanism. The circulation tank 2 circulates water with the heat exchange mechanism through the circulation pump group 4. The condensate is discharged through the condensate tank 1, and the heat exchange mechanism allows the circulating water in the IC tower to exchange heat with the condensate, realizing the function of secondary utilization of waste heat. The residual heat in the condensate is exchanged to the circulating water in the IC tower, thereby supplementing the heat of the IC tower. This not only utilizes the residual heat in the condensate, but also makes the operation of the IC tower more stable.

[0017] like Figure 3As shown, the heat exchange mechanism includes multiple uniformly distributed heat exchange plates fixedly connected inside the condensate tank 1. Alternating condensate flow chambers 14 and circulating water flow chambers 15 are formed between the heat exchange plates. The condensate flow chamber 14 is connected to the pre-filter 5, and the upper part of the circulating water flow chamber 15 is connected to the circulating pump group 4, while the lower part is connected to the circulating tank 2 via a pipeline. Water in the circulating tank 2 enters the circulating water flow chamber 15 through the circulating pump group 4, and steam condensate enters the condensate flow chamber 14. The alternating arrangement of the condensate flow chamber 14 and the circulating water flow chamber 15 heats the circulating water. The condensate after heat exchange is discharged to the environmental protection center's regulating tank or other water-using area, while the heated circulating water enters the IC tower, realizing the utilization of waste heat from the steam condensate.

[0018] The heat exchange plates are provided with condensate flow holes and circulating water flow holes. The condensate flow holes are connected to the condensate flow cavity 14, and the circulating water flow holes are connected to the circulating water flow cavity 15. A first connecting pipe 9 and a second connecting pipe 10 are provided between adjacent heat exchange plates. The first connecting pipe 9 is connected to the condensate flow holes, and the second connecting pipe 10 is connected to the circulating water flow holes. Countercurrent heat exchange can be used to achieve full heat recovery.

[0019] A water receiving tray 16 is provided on the inner side of the upper part of the circulating tank 2. The water receiving tray 16 is connected to the inlet of the circulating pump group 4 through a pipeline. An overflow pipe 17 is also provided inside the circulating tank 2, with the upper end of the overflow pipe passing through the water receiving tray 16. After the circulating water enters the circulating tank 2, it first enters the circulating pump group 4 through the water receiving tray 16 and the pipeline. When the water volume is large, a portion of it enters the lower part of the circulating tank 2 directly through the overflow pipe 17, mixes with the circulating water discharged from the circulating water flow chamber 15 after heating, and is discharged together. Although the water temperature will drop to a certain extent, it can ensure the normal operation of the system, and the resulting temperature fluctuations will not affect the normal production process.

[0020] like Figure 4 As shown, a partition 11 is fixedly connected inside the pre-filter 5. The pre-filter 5 is divided into two chambers by the partition 11. The first filter element 12 and the spare filter element 13 are installed in the two chambers respectively. A switching valve needs to be installed at the input end of the pre-filter 5. The two outlets of the switching valve are respectively located at the upper end of the two chambers. The dual-chamber dual-flow channel design allows the machine to be replaced without stopping, which can improve the operating stability of the device.

[0021] The pre-filter 5 is equipped with a disassembly door 6 at both the first filter element 12 and the spare filter element 13, allowing for the replacement of the filter elements inside the device. Both the first filter element 12 and the spare filter element 13 are made of glass fiber, which not only traps dissolved iron ions but also traps dextran colloids and bacterial fragments, thereby reducing corrosion of the heat exchange plate, extending the device's service life, and also providing a post-treatment filtration process for the condensate, reducing the difficulty of subsequent treatment.

[0022] Working principle: Steam condensate is fed into condensate tank 1 after passing through pre-filter 5. Pre-filter 5 filters out dissolved iron ions, dextran colloids, and bacterial fragments from the steam condensate. Circulating pump unit 4 sends the condensate from condensate tank 1 into circulating tank 2. The high-temperature steam condensate is distributed on the odd-numbered heat exchange plates, while the circulating water is on the even-numbered heat exchange plates. This places the high-temperature condensate on both sides of the circulating water, exchanging heat with it. This allows the condensate to transfer heat to the circulating water, raising its temperature and enabling waste heat utilization. The residual heat in the condensate is transferred to the circulating water in the IC tower, thus supplementing the IC tower's heat supply. This utilizes the residual heat in the condensate and makes the IC tower's operation more stable.

[0023] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A device for reusing steam condensate in dextran production, characterized in that, It includes a condensate tank (1) and a circulation tank (2), a circulation pump set (4) is installed between the condensate tank (1) and the circulation tank (2), a pre-filter (5) is installed at the input end of the condensate tank (1), and the circulation tank (2) is used to supply water to the IC tower; The condensate tank (1) is equipped with a heat exchange mechanism, which includes multiple uniformly distributed heat exchange plates fixedly connected inside the condensate tank (1). A condensate flow chamber (14) and a circulating water flow chamber (15) are alternately arranged between the heat exchange plates. The condensate flow chamber (14) is connected to the pre-filter (5), and the upper part of the circulating water flow chamber (15) is connected to the circulating pump group (4), and the lower part is connected to the circulating tank (2) through a pipeline.

2. The device for reusing steam condensate in dextran production according to claim 1, characterized in that: The heat exchange plate is provided with a condensate flow hole and a circulating water flow hole. The condensate flow hole is connected to the condensate flow cavity (14), and the circulating water flow hole is connected to the circulating water flow cavity (15). A first connecting pipe (9) and a second connecting pipe (10) are provided between adjacent heat exchange plates. The first connecting pipe (9) is connected to the condensate flow hole, and the second connecting pipe (10) is connected to the circulating water flow hole.

3. The device for reusing steam condensate in dextran production according to claim 1, characterized in that: The upper inner side of the circulating tank (2) is provided with a water receiving tray (16), and the water receiving tray (16) is connected to the water inlet of the circulating pump group (4) through a pipeline; An overflow pipe (17) is also provided inside the circulating tank (2), with the upper end of the overflow pipe passing through the water receiving pan (16).

4. The device for reusing steam condensate in dextran production according to claim 1, characterized in that: The pre-filter (5) is fixedly connected to a partition (11). The pre-filter (5) is divided into two chambers by the partition (11). The first filter element (12) and the spare filter element (13) are installed in the two chambers respectively. A switching valve is installed at the input end of the pre-filter (5). The two outlets of the switching valve are respectively located at the upper end of the two chambers.

5. A device for reusing steam condensate in dextran production according to claim 4, characterized in that: The pre-filter (5) is equipped with a disassembly door (6) at both the first filter element (12) and the spare filter element (13).

6. The device for reusing steam condensate in dextran production according to claim 4, characterized in that: The first filter element (12) and the spare filter element (13) are made of glass fiber.

Images