A cooling device for desulfurization liquid

Abstract

The application relates to a cooling device for desulfurization liquid, which comprises a cooling pipeline, heat exchange pipelines located on both sides of the cooling pipeline, a temperature adjusting assembly and a controller; a cavity is arranged in the cooling pipeline to guide the flow of the desulfurization liquid; the heat exchange pipeline comprises heat exchange feet which are arranged on the outer wall of the cooling pipeline at intervals and are used for abutting against the outer wall of the cooling pipeline and realizing heat exchange with the cooling pipeline; the temperature adjusting assembly comprises a balance adjusting valve and a temperature detection sensor; the balance adjusting valve is arranged on the heat exchange pipeline and is used for adjusting the flow of the heat exchange pipeline; the temperature detection sensor is located on the top of the cooling pipeline and is used for sensing the temperature of the cooling pipeline; and the controller is electrically connected with the balance adjusting valve and the temperature detection sensor respectively. The combined design of the balance adjusting valve and the heat exchange feet enables the cooling liquid in the heat exchange pipeline to be adaptively adjusted, and effectively improves the smoothness of the desulfurization liquid cooling process.

Description

Technical Field

[0001] This invention relates to the field of desulfurization cooling technology, and more particularly to a cooling device for desulfurization liquid. Background Technology

[0002] The production of yellow phosphorus generates a large amount of exhaust gas. For environmental protection requirements, this exhaust gas enters a desulfurization tower for desulfurization treatment before being emitted. Because the exhaust gas enters the desulfurization tower at a high temperature, and the desulfurization reaction is exothermic, the temperature of the desulfurization liquid reaches 50-60 degrees Celsius, which cannot meet the required regeneration temperature of 40-45 degrees Celsius. This results in reduced desulfurization efficiency and failure to achieve the desired desulfurization effect. To improve desulfurization efficiency, the temperature of the desulfurization liquid must be lowered (generally using a heat exchanger) to between 35-45 degrees Celsius to ensure regeneration, thereby reducing the production of double salts and improving desulfurization efficiency.

[0003] A Chinese utility model patent with publication number CN210625416U describes a desulfurization slurry cooler. It features multiple circumferentially spaced first through holes on the outer shell, with a cooling water inlet pipe circumferentially positioned around and connected to these holes. This allows water to flow rapidly and from multiple angles into the tubes, enabling quick contact between the cooling water and heat exchange tubes at different locations, thus improving heat exchange efficiency. However, this desulfurization slurry cooler cannot guarantee stable cooling (i.e., it cannot maintain a relatively stable temperature after cooling), inevitably leading to over-cooling of the desulfurization liquid and subsequent cooling crystallization. Once this occurs, scaling and blockage of the pipes can easily occur, affecting the normal operation of the cooler (equivalent to a heat exchanger). Summary of the Invention

[0004] In view of this, it is necessary to provide a cooling device for desulfurization liquid to solve the technical problem of pipe blockage caused by desulfurization liquid cooling crystallization due to excessively rapid cooling in the prior art.

[0005] The present invention provides a cooling device for desulfurization liquid, including a cooling pipeline, a heat exchange pipeline located on both sides of the cooling pipeline, a temperature regulating component and a controller;

[0006] The cooling pipe has an internal cavity for guiding the desulfurization liquid.

[0007] The heat exchange pipeline includes heat exchange feet for abutting against the outer wall of the cooling pipeline and exchanging heat with the cooling pipeline, and the heat exchange feet are spaced apart along the outer wall of the cooling pipeline.

[0008] The temperature regulation component includes a balancing valve and a temperature detection sensor. The balancing valve is disposed on the heat exchange pipeline to regulate the flow rate of the heat exchange pipeline. The temperature detection sensor is located at the top of the cooling pipeline to sense the temperature of the cooling pipeline.

[0009] The controller is electrically connected to the balance regulating valve and the temperature detection sensor, respectively.

[0010] In one embodiment of the present invention, the cavity has a U-shaped structure, and a blind hole is provided at the top of the cooling pipe to approach the center of the top of the cavity. One end of the temperature detection sensor extends into the blind hole and abuts against the bottom of the blind hole.

[0011] In one embodiment of the present invention, the blind holes are uniformly distributed along the axial direction of the cooling pipe, and the temperature detection sensor is correspondingly provided.

[0012] In one embodiment of the present invention, the controller is embedded in the outer wall of one side of the cooling pipe.

[0013] In one embodiment of the present invention, the heat exchange pipeline further includes a square tube, the side of the square tube near the cooling pipeline is connected to the heat exchange foot, and both ends of the square tube are respectively connected to a first conduit. The balance regulating valve is located on the first conduit and is used to regulate the flow rate of the first conduit.

[0014] In one embodiment of the present invention, the end of the first conduit away from the square tube is connected to a second conduit, and the two second conduits are connected to each other to form a circuit.

[0015] In one embodiment of the present invention, at least two square tubes are provided, and at least five heat exchange feet are provided on each square tube.

[0016] In one embodiment of the present invention, the heat exchange foot has a strip-shaped structure and the interior of the heat exchange foot is hollow.

[0017] In one embodiment of the present invention, a cooling pool is provided at the bottom of the cooling pipeline for supporting the cooling pipeline and so that the heat exchange pipeline passes through the cooling pool to form a heat exchange channel.

[0018] In one embodiment of the present invention, the cooling pool includes a pool body and a workbench located at the bottom of the pool body.

[0019] Compared with the prior art, the cooling device for desulfurization liquid provided by the present invention has the following beneficial effects:

[0020] In this invention, heat exchange pipes are installed on both sides of the cooling pipe, allowing the desulfurization liquid inside the cooling pipe to exchange heat with the heat exchange pipes. Furthermore, the heat exchange pipes include heat exchange feet that abut against the outer wall of the cooling pipe, and these feet are spaced apart along the outer wall. This allows the desulfurization liquid to continuously flow within the cooling pipe, making intermittent contact with the heat exchange feet through the outer wall of the cooling pipe and exchanging heat, effectively mitigating the problem of excessively rapid temperature drop. In addition, by installing a balancing valve on the heat exchange pipe and a temperature sensor on the cooling pipe, the operator can capture temperature signals through the temperature sensor and transmit them to the controller. The controller then controls the balancing valve, adjusting the flow rate of the coolant in the heat exchange pipe, thereby controlling the effective contact area between the heat exchange feet and the cooling pipe. Ultimately, this keeps the temperature of the desulfurization liquid at a relatively stable level after the temperature drop, effectively improving the problem of desulfurization liquid crystallization and pipe blockage during cooling.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 An isometric drawing of a cooling device for desulfurization liquid provided by the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 for Figure 1 A top view (temperature sensor hidden);

[0026] Figure 4 for Figure 1 Front view of the intermediate cooling piping;

[0027] Figure 5 for Figure 4 A partial sectional view of AA;

[0028] Figure 6 for Figure 1 Isometric drawing of the intermediate cooling piping;

[0029] Figure 7 for Figure 1 Isometric view of the intermediate cooling pool;

[0030] Figure 8 for Figure 1 Isometric drawing of the heat exchange pipeline;

[0031] Figure 9 for Figure 8 Enlarged view of point B in the middle;

[0032] Figure 10 for Figure 8 The main view;

[0033] Figure 11 for Figure 10 A partially enlarged sectional view of BB.

[0034] The attached figures are labeled as follows:

[0035] 100 Cooling pipe; 110 Cavity; 120 Blind hole; 130 Liquid inlet pipe; 140 Liquid outlet pipe; 150 Support foot; 160 First through hole; 200 Heat exchange pipe; 210 Heat exchange foot; 220 Square tube; 221 Third through hole; 230 First conduit; 240 Second conduit; 300 Temperature control assembly; 310 Balance control valve; 320 Temperature detection sensor; 400 Controller; 500 Cooling pool; 510 Pool body; 511 Second through hole; 520 Workbench; 600 Coolant circulation pump. Detailed Implementation

[0036] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0037] Please see Figures 1-11 This invention provides a cooling device for desulfurization liquid, including a cooling pipe 100, heat exchange pipes 200 located on both sides of the cooling pipe 100, a temperature regulating component 300, and a controller 400. The cooling pipe 100 has an internal cavity 110 for guiding the desulfurization liquid. The heat exchange pipes 200 include heat exchange feet 210 for abutting against the outer wall of the cooling pipe 100 and exchanging heat with it, and the heat exchange feet 210 are spaced apart along the outer wall of the cooling pipe 100. The temperature regulating component 300 includes a balance regulating valve 310 and a temperature detection sensor 320. The balance regulating valve 310 is disposed on the heat exchange pipe 200 to regulate the flow rate of the heat exchange pipe 200. The temperature detection sensor 320 is located at the top of the cooling pipe 100 to sense the temperature of the cooling pipe 100. The controller 400 is electrically connected to the balance regulating valve 310 and the temperature detection sensor 320.

[0038] In the aforementioned cooling device, the desulfurization liquid in the cooling pipe 100 flows along the axial direction of the cooling pipe 100, while the heat exchange foot 210 exchanges heat with the desulfurization liquid in the cooling pipe 100 by abutting against the outer wall of the cooling pipe 100. As the desulfurization liquid continuously cools down under the action of the heat exchange pipe 200, the temperature detection sensor 320 located at the top of the cooling pipe 100 senses the temperature of the desulfurization liquid through the cooling pipe 100 and converts the temperature signal into an electrical signal, which is then transmitted to the controller 400. The controller 400 adjusts the opening and closing degree of the heat exchange pipe 200 through the balance regulating valve 310, thereby controlling the temperature drop of the desulfurization liquid. Because the heat exchange foot 210 and the outer wall of the cooling pipe 100 are spaced apart, the heat exchange efficiency between adjacent layers of the desulfurization liquid in the cooling pipe 100 is different. In particular, the side wall of the cooling pipe 100 layer that is not in contact with the heat exchange foot 210 has a lower heat exchange efficiency and can only rely on the desulfurization liquid between adjacent flow layers and the outer wall of the cooling pipe 100 to achieve heat exchange. This makes the overall heat exchange of the desulfurization liquid more gradual. At the same time, the temperature detection sensor 320 detects the temperature of the desulfurization liquid and uses the controller 400 to control the balance regulating valve 310 to adjust the opening and closing degree of the heat exchange pipe 200, thereby controlling the effective contact area between the heat exchange foot 210 and the cooling pipe, and keeping the temperature of the desulfurization liquid in a relatively stable state after the temperature drops. This effectively improves the problem of desulfurization liquid cooling crystallization clogging the pipe.

[0039] To enable the temperature sensor 320 to more accurately detect the temperature of the desulfurization liquid located in the cooling pipe 100, in one embodiment of the present invention, the cavity 110 has a U-shaped structure, and a blind hole 120 is correspondingly opened at the top of the cooling pipe 100 to approach the top of the cavity 110.

[0040] In the center, one end of the temperature detection sensor 320 extends into the blind hole 120 and abuts against the bottom of the blind hole 120. Preferably, the height of the concave side of the U-shaped structure of the cavity 110 should be at least greater than or equal to half the overall height of the cavity 110. This allows the temperature detection sensor 320 to penetrate deeper into the cavity 110 through the blind hole 120 and to detect the temperature of the desulfurization liquid in the cooling pipe 100 more quickly and accurately, thereby improving the accuracy of temperature detection for the controller 400 (controller).

[0041] The controller 400 preferably uses a PLC controller (which is easier to adapt to harsh industrial production environments) to provide better reference for the subsequent control of the balancing regulating valve 310. Preferably, the balancing regulating valve 310 is a dynamic balancing regulating valve, which not only allows the valve opening to be controlled directly by the current signal sent by the controller 400 without the need for a servo amplifier, but also has stable operation characteristics.

[0042] Furthermore, in one embodiment of the present invention, the blind holes 120 are uniformly distributed along the axial direction of the cooling pipe 100, and the temperature detection sensors 320 are correspondingly arranged. This allows for continuous detection of the desulfurization liquid within the cooling pipe 100 by uniformly distributing the temperature detection sensors 320 along the axial direction of the cooling pipe 100, thereby improving the accuracy of temperature detection. Specifically, the temperatures captured by the multiple temperature detection sensors 320 are transmitted to the controller 400 in the form of electrical signals (which are then amplified and transmitted to the controller 400 via analog-to-digital conversion). The controller 400's control algorithm then calculates the temperature changes and average values, facilitating more precise valve opening control of the balance regulating valve 310. This ensures the smoothness of the desulfurization liquid cooling process and the control and maintenance of the temperature range after cooling.

[0043] For the sake of aesthetics of the cooling device, in one embodiment of the present invention, the controller 400 is embedded in the outer wall of one side of the cooling pipe 100, which also makes it convenient for the operator to operate the controller 400.

[0044] 5. In order to better ensure the realization of the blind hole 120 structure, in one embodiment of the present invention, the heat exchange pipeline 200 further includes a square tube 220. The side of the square tube 220 near the cooling pipeline 100 is connected to the heat exchange foot 210, and the two ends of the square tube 220 are respectively connected to the first conduit 230 (the two ends of the square tube 220 are provided with a third through hole 221 for connecting the first conduit 230). The balance regulating valve 310 is located on the first conduit 230 for regulating the flow rate of the first conduit 230.

[0045] Furthermore, in one embodiment of the present invention, the end of the first conduit 230 away from the square tube 220 is connected to a second conduit 240, and the two second conduits 240 are connected to form a loop. In this way, the flow rate can be adjusted by setting more balance regulating valves 310 on the second conduit 240.

[0046] In order to uniformly cool the desulfurization liquid while ensuring heat exchange efficiency, in one embodiment of the present invention, at least two square tubes 220 are provided, and at least five heat exchange feet 210 are provided on each square tube 220.

[0047] Furthermore, in one embodiment of the present invention, the heat exchange foot 210 has a strip-shaped structure and the interior of the heat exchange foot 210 is hollow, which allows for a relatively uniform and wide spacing between each pair of adjacent heat exchange feet 210, providing a structural basis for intermittent heat exchange.

[0048] To further improve heat exchange efficiency, in one embodiment of the present invention, a cooling pool 500 is provided at the bottom of the cooling pipe 100 (the cooling pool 500 contains another coolant, which can be replenished and discharged according to actual needs) to support the cooling pipe 100 (at this time, the bottom of the cooling pipe 100 is provided with a support foot 150 for connecting to the top end face of the cooling pool 500) and the heat exchange pipe 200 passes through the cooling pool 500 to form a heat exchange channel (a second through hole 511 is correspondingly opened on the side wall of the cooling pool 500 for the passage of the heat exchange pipe 200). In this way, the coolant in the heat exchange pipe 200 can be independently cooled through the cooling pool 500. Specifically, a second conduit 240 can be passed through the cooling pool 500 to form a loop to cool the coolant in the heat exchange pipe 200, thereby improving the heat exchange efficiency. It should be noted that regardless of whether a second conduit 240 is installed and a loop is formed, a coolant circulation pump 600 needs to be installed in the heat exchange pipeline 200, and the inlet and outlet of the coolant circulation pump 600 should be connected to the first conduit 230 or the second conduit 240. Only in this way can the coolant in the heat exchange pipeline 200 be driven to circulate through the coolant circulation pump 600.

[0049] To enhance the expandability of the aforementioned cooling device, in one embodiment of the present invention, the cooling pool 500 includes a pool body 510 and a workbench 520 located at the bottom of the pool body 510. Specifically, more extension components, such as protective covers and guardrails, can be provided around the workbench 520.

[0050] In practical use, the above-mentioned cooling device first introduces desulfurization liquid through the cooling pipe 100 (both ends of the cavity 110 are provided with first through holes 160, which are respectively connected to the inlet pipe 130 and the outlet pipe 140 for the entry and exit of the desulfurization liquid), and then the heat exchange pipes 200 located on both sides of the cooling pipe 100 are circulated with coolant. Because of the spaced design of the heat exchange feet 210 from top to bottom, the heat exchange feet 210 and the outer wall of the cooling pipe 100 are also spaced out. This allows the heat exchange feet 210 to contact the corresponding outer wall of the cooling pipe 100, exchanging heat with the desulfurization liquid in the current level and exchanging heat locally with the desulfurization liquid in adjacent levels. This allows the overall temperature of the desulfurization liquid to decrease gradually. Finally, through the combined action of the temperature detection sensor 320 and the controller 400, the coolant in the heat exchange pipe 200 is adaptively adjusted, ultimately improving the smoothness of the desulfurization liquid cooling process and the controllability of the temperature range after cooling, effectively improving the problem of desulfurization liquid cooling crystallization clogging the pipe.

[0051] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A cooling device for desulfurization liquid, characterized in that, The cooling pipeline, the heat exchange pipeline on both sides of the cooling pipeline, the temperature adjusting assembly and the controller are included. The cooling pipeline is internally provided with a cavity for guiding the desulfurization liquid. The heat exchange pipeline includes heat exchange feet for abutting against the outer wall of the cooling pipeline and realizing heat exchange with the cooling pipeline, and the heat exchange feet are arranged along the outer wall of the cooling pipeline at intervals. The temperature adjusting assembly includes a balance adjusting valve and a temperature detection sensor, the balance adjusting valve is arranged on the heat exchange pipeline for adjusting the flow of the heat exchange pipeline, and the temperature detection sensor is located at the top of the cooling pipeline for sensing the temperature of the cooling pipeline. The controller is electrically connected with the balance adjusting valve and the temperature detection sensor respectively.

2. A cooling device for desulfurization solution according to claim 1, characterized in that, The cavity is in a concave structure, and a blind hole is formed at the top of the cooling pipeline for being close to the top center of the cavity, one end of the temperature detection sensor is inserted into the blind hole and abuts against the bottom of the blind hole.

3. A cooling device for desulfurization solution according to claim 2, characterized in that, The blind holes are uniformly distributed along the axis direction of the cooling pipeline, and the temperature detection sensors are correspondingly arranged.

4. The cooling device for desulfurization solution according to claim 1, characterized by The controller is embedded in one side of the outer wall of the cooling pipeline.

5. The cooling device for desulfurization solution according to claim 1, characterized by The heat exchange pipeline further includes a square tube, the square tube is in communication with the heat exchange feet on one side of the cooling pipeline, and the two ends of the square tube are respectively in communication with first conduits, and the balance adjusting valve is arranged on the first conduits for adjusting the flow of the first conduits.

6. A cooling device for a desulfurizing solution according to claim 5, characterized in that The first conduits are respectively in communication with second conduits away from the square tube, and the second conduits are in communication with each other to form a loop.

7. A cooling device for desulfurization solution according to claim 6, characterized in that, The square tube is provided with at least two heat exchange feet.

8. A cooling device for desulfurization solution according to claim 7, characterized in that, The heat exchange feet are in a strip structure and are hollow inside.

9. The cooling device for a desulfurization solution according to claim 5, characterized by The bottom of the cooling pipeline is provided with a cooling pool for supporting the cooling pipeline, and the heat exchange pipeline is arranged in the cooling pool to form a heat exchange channel.

10. A cooling device for a desulfurizing solution according to claim 9, characterized in that The cooling pool includes a pool body and a workbench at the bottom of the pool body.

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