Kitchen treatment slurry temperature pre-adjusting device

Abstract

The utility model discloses a kitchen processing slurry temperature pre-adjusting device which comprises a slurry main pipeline, a first temperature transmitter used for detecting the temperature of slurry is installed on the slurry main pipeline, the slurry main pipeline is connected with a first pipeline and a second pipeline, and the other end of the first pipeline is connected with an anaerobic system. The other end of the second pipeline is connected with the first pipeline, the second pipeline is provided with a heat exchanger, the heat exchanger comprises a slurry inlet end, a slurry outlet end, a cooling water inlet end and a cooling water outlet end, the second pipeline is installed on the two sides of the slurry inlet end and the slurry outlet end of the heat exchanger, and the cooling water inlet end is connected with a cooling tower through a third pipeline. And the cooling water outlet end is connected with a cooling water outlet pipeline. According to the device, a cooling mode and a heating mode are integrated, precise two-way adjustment of the slurry temperature is achieved, the flexibility and the response speed of temperature adjustment are improved, intelligent adjustment can be conducted according to actual requirements in different seasons and working conditions, and efficient and stable operation of the anaerobic fermentation process is ensured.

Description

Technical Field

[0001] This utility model relates to a temperature pre-regulation device for kitchen waste treatment slurry, belonging to the field of kitchen waste treatment technology. Background Technology

[0002] Food waste treatment is a crucial aspect of urban solid waste management, and its efficient and environmentally friendly treatment methods are of great significance for promoting resource recycling and reducing environmental pollution. In the food waste treatment process, the pretreatment system plays a vital role. It first crushes and pulps the food waste, then separates the solids, liquids, and greases using three-phase separation technology. The resulting slurry then enters an anaerobic system for microbial digestion. During this process, controlling the slurry temperature is one of the key factors in ensuring the efficiency of anaerobic fermentation.

[0003] Anaerobic microorganisms are extremely sensitive to temperature conditions. A suitable temperature range can ensure the activity of microorganisms, thereby improving fermentation efficiency. However, when the slurry temperature is too high, such as exceeding 60°C, the activity of anaerobic bacteria will be severely inhibited or even killed, leading to the obstruction of the fermentation process and a significant decrease in efficiency. Conversely, excessively low slurry temperatures are also detrimental to anaerobic fermentation, reducing the metabolic rate of microorganisms and affecting the treatment effect.

[0004] Currently, existing food waste treatment plants primarily rely on temperature regulation of the slurry within the anaerobic digester for temperature management in their anaerobic systems. However, this single temperature control method proves inadequate when faced with the continuous injection of large amounts of slurry at abnormally high temperatures. In particular, when the slurry temperature is significantly higher or lower than the optimal range, the temperature regulation system within the anaerobic digester often fails to respond quickly enough to effectively adjust the slurry temperature to the optimal range, thus negatively impacting the efficiency of anaerobic fermentation.

[0005] Given the aforementioned issues, pre-conditioning of the slurry entering the anaerobic system is particularly necessary. Pre-conditioning allows the slurry's temperature to be adjusted to a suitable range before entering the anaerobic tank, thereby reducing the burden on the temperature control system within the tank and improving overall processing efficiency. While some temperature control equipment is already available in various industrial sectors, temperature pre-conditioning devices specifically designed for the characteristics of kitchen waste slurry are still relatively rare, especially those capable of simultaneously meeting cooling and heating requirements and adapting to different seasons and operating conditions. Utility Model Content

[0006] To address the aforementioned issues, this invention provides a pre-conditioning device for the temperature of slurry in kitchen waste treatment. This device integrates both cooling and heating modes, enabling precise bidirectional temperature regulation of the slurry. It improves the flexibility and response speed of temperature regulation and allows for intelligent adjustment based on actual needs under different seasons and operating conditions, ensuring the efficient and stable operation of the anaerobic fermentation process.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A kitchen waste slurry temperature pre-regulation device includes a main slurry pipeline for slurry inlet, a first temperature transmitter for detecting slurry temperature installed on the main slurry pipeline, a first pipeline and a second pipeline connected to the main slurry pipeline, the other end of the first pipeline connected to an anaerobic system, the other end of the second pipeline connected to the first pipeline, a heat exchanger installed on the second pipeline, the heat exchanger including a slurry inlet end, a slurry outlet end, a cooling water inlet end and a cooling water outlet end, the second pipeline installed on both sides of the slurry inlet end and the slurry outlet end of the heat exchanger, the cooling water inlet end connected to a cooling tower via a third pipeline, the cooling water outlet end connected to a cooling water outlet pipeline, the cooling water outlet pipeline connected to a first branch pipe and a second branch pipe, the first branch pipe connected to the cooling tower, the second branch pipe connected to a steam heat exchanger, the steam heat exchanger also connected to a steam inlet pipe, a condensate outlet pipe and a circulating water outlet pipe, the circulating water outlet pipe connected to the cooling tower.

[0009] In one embodiment of this utility model, the first pipeline is equipped with a first electric valve.

[0010] In one embodiment of this utility model, a second electric valve, a second temperature transmitter, and a first pressure transmitter are installed on the second pipe on one side of the slurry inlet end.

[0011] In one embodiment of this utility model, a third temperature transmitter, a second pressure transmitter, and a third electric valve are installed on the second pipe on one side of the slurry outlet.

[0012] In one embodiment of this utility model, the third pipeline is equipped with a fourth temperature transmitter, a third pressure transmitter, and a cooling circulation pump.

[0013] In one embodiment of this utility model, a fifth temperature transmitter is installed in the cooling water outlet pipe.

[0014] In one embodiment of this utility model, the first branch pipe is equipped with a fourth electric valve, and the second branch pipe is equipped with a fifth electric valve.

[0015] In one embodiment of this utility model, the steam inlet pipe is equipped with a sixth temperature transmitter, a fourth pressure transmitter, and a steam valve; the circulating water outlet pipe is equipped with a seventh temperature transmitter.

[0016] In one embodiment of this utility model, a controller is further included, which is electrically connected to a first temperature transmitter, a first electric valve, a second electric valve, a second temperature transmitter, a first pressure transmitter, a third electric valve, a third temperature transmitter, a second pressure transmitter, a cooling circulation pump, a fourth temperature transmitter, a third pressure transmitter, a fifth temperature transmitter, a fourth electric valve, a sixth temperature transmitter, a fourth pressure transmitter, a steam valve, and a seventh temperature transmitter; the controller is disposed in a control box.

[0017] In one embodiment of this utility model, the cooling circulation pump is a variable frequency pump, and the heat exchanger is a shell-and-tube heat exchanger.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention provides a pre-regulating device for the temperature of slurry in food processing, integrating both cooling and heating modes. It employs a high-efficiency shell-and-tube heat exchanger, combined with a cooling tower and a steam heating system, to achieve precise bidirectional temperature regulation of the slurry. During the high-temperature period in summer, the cooling water provided by the cooling tower effectively reduces the slurry temperature; while during the low-temperature period in winter, the circulating water is heated by the steam heating system to raise the slurry temperature to a suitable range. This design not only improves the flexibility and response speed of temperature regulation but also enables intelligent adjustment according to the actual needs of different seasons and operating conditions, ensuring the efficient and stable operation of the anaerobic fermentation process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a pre-conditioning device for the temperature of kitchen waste slurry provided by this utility model.

[0021] In the diagram: 1. Main slurry pipeline; 11. First pipeline; 12. Second pipeline; 13. First temperature transmitter; 14. First electric valve; 15. Heat exchanger; 151. Slurry inlet; 152. Slurry outlet; 153. Cooling water inlet; 154. Cooling water outlet; 16. Second electric valve; 17. Second temperature transmitter; 18. First pressure transmitter; 19. Third electric valve; 191. Third temperature transmitter; 192. Second pressure transmitter; 2. Cooling tower; 21. Third pipeline; 2 2. Cooling circulation pump; 23. Fourth temperature transmitter; 24. Third pressure transmitter; 3. Cooling water outlet pipe; 31. Fifth temperature transmitter; 32. First branch pipe; 33. Second branch pipe; 34. Fourth electric valve; 35. Fifth electric valve; 4. Steam heat exchanger; 41. Steam inlet pipe; 42. Condensate outlet pipe; 43. Circulating water outlet pipe; 44. Sixth temperature transmitter; 45. Fourth pressure transmitter; 46. Steam valve; 47. Seventh temperature transmitter; 5. Controller; 51. Control box. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] Please see Figure 1 As shown, this utility model provides a pre-conditioning device for the temperature of kitchen waste slurry, including a main slurry pipe 1. Kitchen waste slurry enters the main slurry pipe 1 from one end. The main slurry pipe 1 is equipped with a first temperature transmitter 13 for detecting the slurry temperature. The main slurry pipe 1 is connected to a first pipe 11 and a second pipe 12. The other end of the first pipe 11 is connected to an anaerobic system. The first pipe 11 is equipped with a first electric valve 14. The other end of the second pipe 12 is connected to the first pipe 11. The second pipe 12 is equipped with a heat exchanger 15.

[0026] In some embodiments, the heat exchanger 15 includes a slurry inlet end 151, a slurry outlet end 152, a cooling water inlet end 153, and a cooling water outlet end 154; the second pipe 12 is installed on both sides of the slurry inlet end 151 and the slurry outlet end 152 of the heat exchanger 15; the second pipe 12 on the side of the slurry inlet end 151 is equipped with a second electric valve 16, a second temperature transmitter 17, and a first pressure transmitter 18; the second pipe 12 on the side of the slurry outlet end 152 is equipped with a third temperature transmitter 191, a second pressure transmitter 192, and a third electric valve 19; the cooling water inlet end 153 is connected to a cooling tower 2 through a third pipe 21; the third pipe 21 is equipped with a fourth temperature transmitter 23, a third pressure transmitter 24, and a cooling circulation pump 22; the cooling water outlet end 154 is connected to a cooling water outlet pipe 3; the cooling water outlet pipe 3 is equipped with a fifth temperature transmitter 31.

[0027] In some embodiments, the cooling water outlet pipe 3 is connected to a first branch pipe 32 and a second branch pipe 33. The first branch pipe 32 is connected to the cooling tower 2 and is equipped with a fourth electric valve 34. The second branch pipe 33 is connected to a steam heat exchanger 4.

[0028] Furthermore, the second branch pipe 33 is equipped with a fifth electric valve 35.

[0029] In some embodiments, the steam heat exchanger 4 is further connected to a steam inlet pipe 41, a condensate outlet pipe 42, and a circulating water outlet pipe 43, the circulating water outlet pipe 43 being connected to the cooling tower 2.

[0030] Furthermore, the steam inlet pipe 41 is equipped with a sixth temperature transmitter 44, a fourth pressure transmitter 45, and a steam valve 46.

[0031] Furthermore, a seventh temperature transmitter 47 is installed on the circulating water outlet pipe 43.

[0032] In some embodiments, the system further includes a controller 5, which is electrically connected to a first temperature transmitter 13, a first electric valve 14, a second electric valve 16, a second temperature transmitter 17, a first pressure transmitter 18, a third electric valve 19, a third temperature transmitter 191, a second pressure transmitter 192, a cooling circulation pump 22, a fourth temperature transmitter 23, a third pressure transmitter 24, a fifth temperature transmitter 31, a fourth electric valve 34, a sixth temperature transmitter 44, a fourth pressure transmitter 45, a steam valve 46, and a seventh temperature transmitter 47.

[0033] Optionally, the controller 5 is located inside the control box 51.

[0034] All instrument signals, equipment operation signals, and control signals in the system are connected to the control box 51. The controller 5 in the control box 51 determines whether to activate the temperature regulation device based on the detected slurry delivery pump outlet temperature signal.

[0035] Optionally, the cooling circulation pump 22 is a variable frequency pump.

[0036] Optionally, the heat exchanger 15 is a shell-and-tube heat exchanger.

[0037] The control process of the kitchen waste slurry temperature pre-regulation device provided by this utility model is as follows:

[0038] Based on the temperature signal from the outlet of the slurry delivery pump connected to the main slurry pipeline 1, the controller 5 automatically determines whether to activate the cooling or heating mode. By monitoring the slurry temperature in real time, the controller automatically controls the opening and closing of the electric valve and the start and stop of the fan and cooling circulation pump 22 of the cooling tower 2, thereby achieving pre-regulation of the slurry temperature.

[0039] Cooling Mode: When the slurry temperature is detected to be above the preset safety range (e.g., above 45°C), the slurry cooling system is activated. The activation process is as follows: Keep the fifth electric valve 35 closed, first open the second electric valve 16, the third electric valve 19, and the fourth electric valve 34. When all three electric valves are fully open, close the first electric valve 14, and simultaneously start the cooling tower 2 and the cooling circulation pump 22. When the first temperature transmitter 13 detects that the slurry temperature has dropped below the preset safety range (e.g., below 40°C), open the first electric valve 14. When it is fully open, automatically close the second electric valve 16 and the third electric valve 19. When the second electric valve 16 and the third electric valve 19 are fully closed, shut down the cooling tower 2 and the cooling circulation pump 22, allowing the slurry to resume its normal transport process and enter the anaerobic system.

[0040] Heating Mode: When the slurry temperature is detected to be below the preset safety range (e.g., below 25℃), the slurry heating system is activated. The activation process is as follows: Keep the fourth electric valve 34 closed, first open the fifth electric valve 35. When the fifth electric valve 35 is fully open, start the cooling circulation pump 22, then open the steam valve 46 to heat the water in the cooling tower 2 water tank. The circulating water flows through the shell-and-tube heat exchanger 15 and then through the steam heat exchanger 4, thereby increasing the temperature of the circulating water. Open the second electric valve 16 and the third electric valve 19. When both electric valves are fully open, close the first electric valve 14. When the slurry temperature is detected to be above the preset safety range (e.g., above 40℃), close the steam valve 46 and open the first electric valve 14. When the first electric valve 14 is fully open, automatically close the second electric valve 16 and the third electric valve 19. When the second electric valve 16 and the third electric valve 19 are fully closed, shut off the cooling circulation pump 22, allowing the slurry to resume its normal transport process and enter the anaerobic system.

[0041] For more precise temperature control, the cooling circulation pump 22 can be configured as a variable frequency pump, and the steam valve 46 as a steam regulating valve. The controller 5 adjusts the frequency of the circulation pump 22 and the opening of the steam valve 46 in real time based on the preset temperature and the detected slurry inlet temperature and heat exchanger 15 outlet temperature. This device is suitable not only for temperature regulation of kitchen slurries but also for other industries requiring liquid temperature control.

[0042] In summary, this invention provides a pre-regulation device for the temperature of kitchen waste slurry, integrating both cooling and heating modes. It employs a high-efficiency shell-and-tube heat exchanger, combined with a cooling tower and a steam heating system, to achieve precise bidirectional temperature regulation of the slurry. During the high-temperature period in summer, the cooling water provided by the cooling tower effectively reduces the slurry temperature; while during the low-temperature period in winter, the circulating water is heated by the steam heating system to raise the slurry temperature to a suitable range. This design not only improves the flexibility and response speed of temperature regulation but also enables intelligent adjustment according to the actual needs of different seasons and operating conditions, ensuring the efficient and stable operation of the anaerobic fermentation process.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

[0045] This document uses specific embodiments to illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A kitchen process slurry temperature pre-conditioning apparatus characterized by, The application relates to a slurry main pipeline (1) for slurry feeding, wherein a first temperature transmitter (13) for detecting slurry temperature is arranged on the slurry main pipeline (1), a first pipeline (11) and a second pipeline (12) are connected to the slurry main pipeline (1), the other end of the first pipeline (11) is connected to an anaerobic system, the other end of the second pipeline (12) is connected to the first pipeline (11), a heat exchanger (15) is arranged on the second pipeline (12), the heat exchanger (15) comprises a slurry inlet end (151), a slurry outlet end (152), a cooling water inlet end (153) and a cooling water outlet end (154), the second pipeline (12) is arranged on the two sides of the slurry inlet end (151) and the slurry outlet end (152) of the heat exchanger (15), the cooling water inlet end (153) is connected to a cooling tower (2) through a third pipeline (21), the cooling water outlet end (154) is connected to a cooling water outlet pipeline (3), the cooling water outlet pipeline (3) is connected to a first branch pipeline (32) and a second branch pipeline (33), the first branch pipeline (32) is connected to the cooling tower (2), the second branch pipeline (33) is connected to a steam heat exchanger (4), the steam heat exchanger (4) is further connected to a steam inlet pipeline (41), a condensed water outlet pipeline (42) and a circulating water outlet pipeline (43), and the circulating water outlet pipeline (43) is connected to the cooling tower (2).

2. The kitchen process slurry temperature pre-conditioning apparatus of claim 1, wherein, The first pipeline (11) is provided with a first electric valve (14).

3. The kitchen process slurry temperature pre-conditioning apparatus of claim 2, wherein, The second pipeline (12) on the side of the slurry inlet end (151) is provided with a second electric valve (16), a second temperature transmitter (17) and a first pressure transmitter (18).

4. The kitchen process slurry temperature pre-conditioning apparatus of claim 3, wherein, The second pipeline (12) on the side of the slurry outlet end (152) is provided with a third temperature transmitter (191), a second pressure transmitter (192) and a third electric valve (19).

5. The kitchen process slurry temperature pre-conditioning apparatus of claim 4, wherein, The third pipeline (21) is provided with a fourth temperature transmitter (23), a third pressure transmitter (24) and a cooling circulating pump (22).

6. The kitchen process slurry temperature pre-conditioning apparatus of claim 5, wherein, The cooling water outlet pipeline (3) is provided with a fifth temperature transmitter (31).

7. The kitchen process slurry temperature pre-conditioning apparatus of claim 6, wherein, The first branch pipeline (32) is provided with a fourth electric valve (34), and the second branch pipeline (33) is provided with a fifth electric valve (35).

8. The kitchen process slurry temperature pre-conditioning apparatus of claim 7, wherein, The steam inlet pipeline (41) is provided with a sixth temperature transmitter (44), a fourth pressure transmitter (45) and a steam valve (46), and the circulating water outlet pipeline (43) is provided with a seventh temperature transmitter (47).

9. The kitchen process slurry temperature pre-conditioning apparatus of claim 8, wherein, Also include a controller (5), the controller (5) is connected with the first temperature transmitter (13), the first electric valve (14), the second electric valve (16), the second temperature transmitter (17), the first pressure transmitter (18), the third electric valve (19), the third temperature transmitter (191), the second pressure transmitter (192), the cooling circulating pump (22), the fourth temperature transmitter (23), the third pressure transmitter (24), the fifth temperature transmitter (31), the fourth electric valve (34), the sixth temperature transmitter (44), the fourth pressure transmitter (45), the steam valve (46), the seventh temperature transmitter (47); the controller (5) is arranged in the control box (51).

10. The kitchen process slurry temperature pre-conditioning apparatus of claim 9, wherein, The cooling circulating pump (22) is a variable frequency regulation pump, and the heat exchanger (15) is a double-pipe heat exchanger.

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