Online pH detection device for reaction kettle and reaction kettle

Abstract

The utility model provides a pH online detection device for a reaction kettle and the reaction kettle. The pH online detection device comprises a pH electrode and a water sedimentation tank. The pH electrode is used for being fixedly arranged on a reaction kettle, and one end of the pH electrode is provided with a detection end capable of detecting the pH value of liquid. The sinking tank is arranged at the bottom of the detection end; a circulation channel is formed between the inner cavity of the reaction kettle and the inner cavity of the sinking tank. When the liquid level in the reaction kettle is higher than the circulating channel, liquid in the reaction kettle can enter the water settling tank through the circulating channel; and when the liquid level in the reaction kettle is lower than the flowing channel, the water sedimentation tank can still contain liquid, and the detection end can extend below the liquid level of the water sedimentation tank. The pH online detection device can further comprise a cleaning device which is used for flushing the detection end and replacing liquid in the water sedimentation tank. For example, after the reaction kettle is emptied, the cleaning device can add clear water into the sedimentation tank, so that the pH electrode can be soaked in the clear water to prolong the service life.

Description

TECHNICAL FIELD

[0001] The present application relates to a detection device for materials in a reaction kettle, in particular to a pH on-line detection device for a reaction kettle and a reaction kettle. BACKGROUND

[0002] Controlling the pH value of materials in a reaction kettle is crucial for the smooth progress of chemical reactions.

[0003] The existing detection method has obvious limitations, for example: traditional offline detection needs to extract materials by pump for separate measurement, which is tedious and time-consuming, and has problems such as detection lag, poor sensitivity and poor stability, affecting product quality and yield; the pH electrode can be directly inserted into the reaction kettle for real-time online detection, but when the reaction kettle is idle and emptied, the pH electrode will be contaminated due to long-term exposure to air, affecting the detection accuracy and the service life of the electrode. CONTENT OF THE UTILITY MODEL

[0004] In order to solve or alleviate at least one problem mentioned in the background art, the present application provides a pH on-line detection device for a reaction kettle and a reaction kettle.

[0005] The pH on-line detection device for a reaction kettle provided by the embodiments of the present application comprises:

[0006] a pH electrode, which is fixedly arranged in the reaction kettle, one end of the pH electrode having a detection end capable of detecting the pH value of a liquid;

[0007] a sink arranged at the bottom of the detection end, the inner cavity of the reaction kettle and the inner cavity of the sink having a flow passage therebetween;

[0008] a cleaning device for cleaning the detection end and replacing the liquid in the sink,

[0009] When the liquid level in the reaction kettle is higher than the flow passage, the liquid in the reaction kettle can enter the sink through the flow passage; when the liquid level in the reaction kettle is lower than the flow passage, the sink can still contain liquid, and the detection end can be inserted below the liquid surface of the sink.

[0010] In at least one embodiment, the pH on-line detection device for a reaction kettle further comprises a protection tube, the other end of the pH electrode being sealingly connected to the protection tube, the protection tube extending into the reaction kettle, and the line of the pH electrode extending out of the reaction kettle through the protection tube.

[0011] In at least one embodiment, the sink is formed as a sleeve connected to the bottom of the protection tube, and the flow passage is formed as a hole in the side wall of the sleeve.

[0012] In at least one embodiment, the pH on-line detection device for a reaction kettle comprises a flange, the protection pipe is fixedly connected to the flange, and the protection pipe is connected to the reaction kettle via the flange.

[0013] In at least one embodiment, the pH on-line detection device for a reaction kettle comprises a cleaning pipe, one end of the cleaning pipe is connected to a water source, the other end is connected to the sink, and the cleaning pipe is configured to flush water to the detection end, add water to the sink, or the cleaning pipe is configured to flush water to the detection end, add water to the sink, and draw water.

[0014] In at least one embodiment, the sink and the protection pipe have a spacing therebetween, and the spacing is formed as a flow passage.

[0015] In at least one embodiment, the sink is configured to move in the axial direction of the protection pipe to adjust the distance between the detection end and the sink.

[0016] In at least one embodiment, the pH on-line detection device for a reaction kettle comprises a cleaning pipe, one end of the cleaning pipe is connected to a water source, the other end is connected to the sink, and the cleaning pipe is configured to flush water to the detection end, add water to the sink, or the cleaning pipe is configured to flush water to the detection end, add water to the sink, and draw water.

[0017] The pH on-line detection device for a reaction kettle further comprises a power element, which can drive the cleaning pipe to move, thereby driving the sink to move.

[0018] In at least one embodiment, a limiting device is arranged between the cleaning pipe and the protection pipe, and the cleaning pipe is movably connected to the protection pipe in parallel.

[0019] The reaction kettle provided by the embodiments of the present application comprises the pH on-line detection device for a reaction kettle as described above.

[0020] The pH electrode provided by the present application can be inserted into the reaction kettle to on-line detect the pH value, thereby improving the sensitivity and stability of detection. The sink is further arranged, and after the reaction kettle is emptied, the sink still contains liquid, and the detection end of the pH electrode can be soaked in the liquid (e.g., clean water) in the sink, thereby avoiding the detection end from being exposed to air for a long time, and prolonging the service life. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structure schematic diagram of a pH on-line detection device for a reaction kettle according to Embodiment One of the present application is shown.

[0022] Figure 2 A schematic diagram of an online pH detection device for a reactor according to Embodiment 2 of this application is shown, indicating that the liquid level in the reactor is high and the detection end is immersed in the liquid in the reactor.

[0023] Figure 3 A schematic diagram of an online pH detection device for a reactor according to Embodiment 2 of this application is shown, indicating that the liquid level in the reactor is low and the detection end is immersed in the liquid in the settling tank.

[0024] Explanation of reference numerals in the attached figures

[0025] 100 pH electrode

[0026] 110 detection terminal

[0027] Route 120

[0028] 200 Submerged Pool

[0029] 210 sleeve

[0030] 211 holes

[0031] 212 interval

[0032] 300 protective tube

[0033] 400 flange

[0034] 500 Cleaning Tube

[0035] 600 power components

[0036] 700 Limit Device

[0037] 800 Electrode Sealing Ring Detailed Implementation

[0038] Exemplary embodiments of this application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are for teaching those skilled in the art how to implement this application only, and are not intended to exhaustively describe all possible methods of this application, nor to limit the scope of this application.

[0039] This application provides an online pH (value) detection device and a reaction vessel for use in a reactor.

[0040] Example 1

[0041] See Figure 1The pH on-line detection device for the reaction kettle can include a pH electrode 100, a sink 200 and a cleaning device. The pH electrode 100 is fixedly arranged in the reaction kettle (for example, the pH electrode 100 can be fixedly arranged in the reaction kettle through a protection tube 300 and a flange 400, which will be described later). One end of the pH electrode 100 has a detection end 110 capable of detecting the pH value of a liquid.

[0042] The sink 200 can be arranged at the bottom of the detection end 110. The inner cavity of the reaction kettle and the inner cavity of the sink 200 have a flow passage (for example, a hole 211 or a gap 212, which will be described later). When the liquid level in the reaction kettle is higher than the flow passage, the liquid in the reaction kettle can enter the sink 200 through the flow passage; when the liquid level in the reaction kettle is lower than the flow passage, the sink 200 can still contain the liquid, and the detection end 110 can be immersed below the liquid surface of the sink 200.

[0043] The cleaning device is used to flush the detection end 110 and replace the liquid in the sink 200. For example, after the reaction kettle is emptied, the cleaning device can add clean water to the sink 200, so that the pH electrode 100 can be soaked in the clean water to increase the service life.

[0044] Therefore, when the reaction kettle normally has liquid, the detection end 110 can be immersed in the liquid, and the pH of the liquid can be detected. After the reaction kettle is emptied, the sink 200 still contains liquid, and the detection end 110 can be soaked in the liquid in the sink 200, thereby avoiding long-term exposure to air and increasing the service life of the pH electrode 100.

[0045] In one embodiment, the pH on-line detection device for the reaction kettle can further include a protection tube 300. The other end of the pH electrode 100 is sealingly connected to the protection tube 300. The protection tube 300 can extend into the reaction kettle, and the line 120 of the pH electrode 100, such as a signal line, a power line, etc., can extend out of the reaction kettle through the protection tube 300.

[0046] For example, the line 120 of the pH electrode 100 can be connected to a display to display the pH value. The line 120 of the pH electrode 100 can be connected to a DCS system (Distributed Control System) to further realize functions such as adding corresponding materials to the reaction kettle according to the pH value. An electrode sealing ring 800 can be arranged between the pH electrode 100 and the protection tube 300 to enhance the sealing effect.

[0047] It should be understood that the protection tube 300 is relatively long, and the present application schematically represents the structure of the protection tube 300 through a disconnected schematic view.

[0048] In one embodiment, the sink 200 can be formed as a sleeve 210 connected to the bottom of the protection tube 300, and the flow passage is formed as a hole 211 on the sidewall of the sink 200. Exemplarily, three holes 211 can be arranged in the circumferential direction. The diameter of the hole 211 can be 45 mm.

[0049] In one embodiment, the pH on-line detection device for the reactor can include a flange 400, and the protection tube 300 is fixedly connected to the flange 400, and the protection tube 300 can be fixedly connected to the reactor via the flange 400.

[0050] In one embodiment, the cleaning device can include a cleaning tube 500, one end of the cleaning tube 500 is used to connect a water source, and the other end is connected to the sink 200, and the cleaning tube 500 is configured to be capable of flushing water to the detection end 110, adding water to the sink 200, or the cleaning tube 500 is configured to be capable of flushing water to the detection end 110, adding water to the sink 200, and pumping water.

[0051] For example, when the water adding function is performed, the liquid in the sink 200 can be diluted, so as to avoid the detection end 110 from being soaked in the acidic or alkaline environment for a long time, and also to avoid the sink 200 from lacking water. For example, when the water pumping function is performed, the remaining liquid (fresh water or water containing the material in the previous reactor) in the sink 200 can be pumped away in time when the liquid is added to the reactor, so as to avoid the mixing of the new and old liquids. Of course, when the pH electrode 100 does not perform on-line detection for a long time, the cleaning tube 500 can add water to the sink, so as to avoid the pH electrode 100 from being exposed to the air for a long time.

[0052] Example 2

[0053] Referring to Figure 2 , Figure 3 , compared with Example 1, the differences of Example 2 include that the hole 211 can not be arranged on the sidewall of the sink 200, and the sink 200 and the protection tube 300 have a spacing 212, and the spacing 212 is formed as a flow passage.

[0054] In one embodiment, the sink 200 is configured to be capable of moving in the axial direction of the protection tube 300, so as to adjust the distance between the detection end 110 and the sink 200.

[0055] As shown in Figure 2 , when the reactor normally has liquid, the detection end 110 directly detects the pH value of the liquid. As shown in Figure 3 , when the material in the reactor needs to be emptied, the height of the sink 200 can be raised, so that the detection end 110 can still be soaked in the liquid in the sink 200, and the detection end 110 is protected.

[0056] In one embodiment, the pH on-line detection device for the reactor can include a power element 600 such as a cylinder, a motor, etc., which can be connected to the sink 200 through a connecting member such as a shaft, a rod, etc., to drive the sink 200 to move. Exemplarily, a cleaning pipe 500 can be used as the connecting member, with two ends rigidly connected to the power element 600 and the sink 200, respectively, so that the power element 600 drives the sink 200 to move through the cleaning pipe 500. A water source can be connected to an opening on the cleaning pipe 500 through a hose, so that the cleaning pipe 500 can realize the water adding function. Of course, the height of the sink 200 can also be adjusted and limited in other forms. The height adjusting means can also be manually operated.

[0057] In one embodiment, a limiting device 700 such as a hoop can be arranged between the cleaning pipe 500 and the protection pipe 300, so that the posture of the cleaning pipe 500 is limited, for example, the cleaning pipe 500 is parallel to and movably connected to the protection pipe 300. It should be understood that the hoop specifically refers to the hoop that only limits the position of the cleaning pipe 500 and the protection pipe 300 in the horizontal direction, and allows the cleaning pipe 500 and the protection pipe 300 to move in the height direction.

[0058] The reactor provided in the present application can include the aforementioned pH on-line detection device for the reactor.

[0059] The reactor can include a flat surface or a flange part for connecting with the flange 400.

[0060] The above describes the preferred embodiments of the present application. It should be pointed out that, for those skilled in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A pH on-line detection device for a reaction kettle, characterized in that, The pH on-line detection device for a reactor comprises: a pH electrode fixedly arranged in the reactor, one end of the pH electrode having a detection end capable of detecting the pH value of a liquid; a sink arranged at the bottom of the detection end, the inner cavity of the reactor and the inner cavity of the sink having a flow passage therebetween; a cleaning device for flushing the detection end and replacing the liquid in the sink, when the liquid level in the reactor is higher than the flow passage, the liquid in the reactor can enter the sink through the flow passage; when the liquid level in the reactor is lower than the flow passage, the sink can still contain liquid, and the detection end can be immersed below the liquid surface of the sink. 2.The pH on-line detection device for a reaction kettle according to claim 1, characterized in that, The pH on-line detection device for a reactor further comprises a protection tube, the other end of the pH electrode being sealingly connected to the protection tube, the protection tube extending into the reactor, and the line of the pH electrode extending out of the reactor through the protection tube. 3.The pH on-line detection device for a reaction kettle according to claim 2, characterized in that, The sink is formed as a sleeve connected to the bottom of the protection tube, and the flow passage is formed as a hole in the side wall of the sleeve. 4.The pH on-line detection device for a reaction kettle according to claim 2, characterized in that, The pH on-line detection device for a reactor comprises a flange, the protection tube being fixedly connected to the flange, and the protection tube being connected to the reactor through the flange.

5. The pH on-line detection device for a reaction kettle according to claim 1, characterized in that, The pH on-line detection device for a reactor comprises a cleaning tube, one end of the cleaning tube being connected to a water source, and the other end of the cleaning tube being connected to the sink, the cleaning tube being configured to flush water to the detection end, add water to the sink, or the cleaning tube being configured to flush water to the detection end, add water to the sink, and pump water out of the sink. 6.The pH on-line detection device for a reaction kettle according to claim 2, characterized in that, The sink and the protection tube have a spacing therebetween, the spacing being formed as a flow passage. 7.The pH on-line detection device for a reaction kettle according to claim 6, characterized in that, The sink is configured to move in the axial direction of the protection tube to adjust the distance between the detection end and the sink. 8.The pH on-line detection device for a reaction kettle according to claim 7, characterized in that, The pH on-line detection device for a reactor comprises a cleaning tube, one end of the cleaning tube being connected to a water source, and the other end of the cleaning tube being connected to the sink, the cleaning tube being configured to flush water to the detection end, add water to the sink, or the cleaning tube being configured to flush water to the detection end, add water to the sink, and pump water out of the sink, the cleaning tube being rigidly connected to the sink, The pH on-line detection device for a reactor further comprises a power element, the power element being capable of driving the cleaning tube to move, thereby driving the sink to move. 9.The pH on-line detection device for a reaction kettle according to claim 8, characterized in that, A limiting device is arranged between the cleaning tube and the protection tube, the cleaning tube being parallelly and movably connected to the protection tube.

10. A reaction vessel, characterized by, The pH on-line detection device for a reactor comprises any one of claims 1 to 9.

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