A liquid stirring reactor input type liquid level meter device

Abstract

The invention discloses a liquid stirring reactor immersion type liquid level meter device. It comprises a sleeve vertically inserted into the reactor from the top of the reactor and a liquid level meter. The liquid level meter head is installed on the top of the sleeve and the waveguide cable connected to the liquid level meter head extends to the bottom of the sleeve. The probe connected to the bottom of the waveguide cable is located at the bottom opening of the sleeve. There is a gap between the waveguide cable and the sleeve that allows the liquid to enter the sleeve. The advantages are: it solves the measurement error caused by the interference of the flow of the highly corrosive liquid and foam when measuring the liquid level of the highly corrosive liquid in the stirring reactor, and provides accurate measurement data for actual production operations. The probe is limited in a small space and does not shake violently with the flow of the liquid in the reactor, which further ensures the accuracy of the measurement. The nitrogen purge at the air pressure balance tee can also effectively prevent the formation of liquid beads on the inner wall of the fluorine-lined sleeve when the temperature of the highly corrosive liquid in the reactor is high, which affects the measurement accuracy.

Description

Technical Field

[0001] The invention relates to a liquid level meter device mainly used for liquid level measurement in a liquid stirring kettle, specifically a liquid stirring reactor immersion type liquid level meter device suitable for highly corrosive liquids (such as concentrated sulfuric acid, ionic liquid, etc.) and having a stirring device in the kettle. Background Art

[0002] In the reaction process of some highly corrosive liquids (such as concentrated sulfuric acid, ionic liquids, etc.), immersion level meters are usually used to measure the liquid level to obtain measurement data. The immersion level meter includes a flexible waveguide cable and a stainless steel probe. This structure makes the immersion level meter usually used for measuring liquids with relatively calm liquid surfaces, and the metal probe must be immersed below the liquid surface with weak corrosiveness, otherwise it will affect the accuracy of the level meter. However, in actual work production, this ideal condition is difficult to meet. Ionic liquids (a mixture of about 7 ingredients such as pyridine and alkylpyridine hydrogen sulfate and hydrogen phosphate, imidazole and alkylimidazole hydrogen sulfate and hydrogen phosphate, free acid, etc.) are one of them. A catalyst that catalyzes the reaction of acetic acid and ethanol to produce ethyl acetate is highly corrosive. As the running time changes, the active components of the catalyst deteriorate and the catalyst needs to be regenerated. This regeneration process requires the addition of an ionic liquid regenerant and stirring through a stirring device in the reactor. After the stirring device of the reactor is turned on, the liquid surface is no longer calm under the action of the stirring device. On the one hand, the accuracy of liquid level control will be affected by the bubbles on the liquid surface after stirring. On the other hand, the stainless steel probe immersed in the ionic liquid is easily corroded. On the other hand, due to the presence of the stirring device, the waveguide cable is easily entangled on the stirring paddle of the stirring device, which leads to accidents. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a liquid stirring reactor immersion type liquid level meter device which can improve detection stability and detection accuracy and improve corrosion resistance.

[0004] In order to solve the above technical problems, the liquid stirring reactor immersion liquid level meter device of the present invention includes a sleeve vertically inserted into the reactor from the top of the reactor with a stirring paddle and a liquid level meter that can be installed in conjunction with the sleeve. The liquid level meter head of the liquid level meter is installed on the top of the sleeve and the waveguide cable connected to the liquid level meter head extends vertically to the bottom of the sleeve along the axis of the sleeve. The probe connected to the bottom of the waveguide cable is located at the bottom opening of the sleeve, and there is a gap between the waveguide cable and the sleeve that allows liquid to enter the sleeve.

[0005] The inner wall and the outer wall of the sleeve are both coated with fluorine material.

[0006] The casing is a steel pipe.

[0007] The waveguide cable and the probe are both coated with fluorine material.

[0008] The bottom opening of the sleeve is configured as a conical opening, and the probe of the liquid level meter extends into the conical opening of the sleeve, so that a gap exists between the probe and the conical opening to allow liquid to enter the sleeve.

[0009] A pressure balancing tee is arranged on one side of the top of the sleeve.

[0010] The probe is a stainless steel probe.

[0011] The advantages of the present invention are:

[0012] 1. By setting a liquid level gauge located above the reactor with a stirring paddle, a sleeve inserted into the reactor, and a waveguide cable that can be inserted into the sleeve, the liquid level gauge is directly inserted into the sleeve and protected by the sleeve, thereby avoiding the external influence of the liquid level fluctuation caused by the stirring of the stirring paddle on the measurement of the liquid level gauge, meeting the application of the immersion liquid level gauge in the stirred reactor, ensuring that after the stirring is turned on, the bubbles generated are not easy to reach the sleeve, thereby solving the measurement error caused by the interference of the flow of the highly corrosive liquid and the foam when the immersion liquid level gauge measures the liquid level of the highly corrosive liquid in the stirred reactor, and providing accurate measurement data for actual production operations.

[0013] 2. The probe of the immersion level meter is located at the end of the casing (conical structure). Under the action of the waveguide cable and its own weight, the probe is confined in a narrow space and does not shake violently with the flow of the liquid in the reactor, which further ensures the accuracy of the measurement.

[0014] 3. The casing is made of steel pipe. When the stirring paddle rotates, it can effectively prevent the casing from shear deformation. The inner and outer walls of the casing, as well as the waveguide cable and the probe are coated with corrosion-resistant fluorine materials to ensure that they are not in direct contact with highly corrosive liquids, further extending the service life.

[0015] 4. A pressure balancing tee is installed at the vent to balance the pressure inside the reactor and outside, allowing the liquid in the reactor to smoothly enter the steel fluorine-lined casing. The pressure balancing tee can also be connected to nitrogen (N2) for purging, preventing the formation of liquid beads on the inner wall of the fluorine-lined casing when the temperature of the highly corrosive liquid in the reactor is high, affecting the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the immersion type liquid level meter device of the liquid stirring reactor of the present invention.

[0017] In the figure: 1-level meter head; 2-pressure balance tee; 3-casing; 4-fluorine material; 5-waveguide cable; 6-stainless steel probe; 7-stirring paddle; 8-highly corrosive liquid; 9-reactor. DETAILED DESCRIPTION

[0018] The liquid stirring reactor input type liquid level meter device of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] As shown in the figure, the liquid stirring reactor immersion type liquid level gauge device of the present invention is mainly suitable for measuring the liquid in the liquid stirring reactor with a stirring device. The measured liquid is mainly a highly corrosive liquid (such as concentrated sulfuric acid, ionic liquid, etc.). It can be seen from the figure that the liquid stirring reactor includes a reactor body and a stirring device arranged on the reactor body. The stirring paddle of the stirring device extends into the reactor body to stir the liquid in the reactor body. The liquid stirring reactor immersion type liquid level gauge device includes a steel lined fluorine sleeve vertically inserted into the reactor 9 from above the reactor 9 with a stirring paddle 7 and a liquid level gauge that can be installed in conjunction with the steel lined fluorine sleeve. There is a distance between the stirring paddle 7 and the steel lined fluorine sleeve. The steel lined fluorine sleeve is specifically a sleeve 3 made of steel material with the inner wall and the outer wall coated with a corrosion-resistant fluorine material-polytetrafluoroethylene (PTFE) 4. When the stirring paddle rotates, the sleeve can be effectively prevented from Shear deformation occurs, and a 15KV electric spark inspection is required after the fluorine material is wrapped inside and outside the casing 3. It is qualified if there is no leakage phenomenon; the liquid level meter includes a liquid level meter head 1, a waveguide cable 5 connected to the liquid level meter head 1, and a stainless steel probe 6 connected to the end of the waveguide cable 5. The liquid level meter head 1 of the liquid level meter is installed on the top of the casing and the waveguide cable 5 connected to the liquid level meter head 1 extends vertically to the bottom of the steel-lined fluorine casing along the axis of the casing 3. The stainless steel probe 6 connected to the bottom of the waveguide cable 5 is located at the bottom opening of the casing 3. There is a gap between the waveguide cable 5 and the steel-lined fluorine casing to allow the liquid 8 to enter the casing 3. A pressure balancing tee 2 is provided on one side of the top of the casing 3, thereby balancing the pressure inside the reactor and the outside pressure, so that the liquid in the reactor can smoothly enter the steel-lined fluorine casing. The pressure balancing tee can also be connected to nitrogen (N2) for purging to prevent the formation of liquid beads on the inner wall of the steel-lined fluorine casing when the temperature of the highly corrosive liquid in the reactor is high, affecting the measurement accuracy.

[0020] Furthermore, the bottom opening of the steel-lined fluorine casing is set as a conical opening, and the stainless steel probe 6 of the liquid level meter extends into the conical opening of the steel-lined fluorine casing and a gap is provided between the stainless steel probe 6 and the conical opening so that the liquid can enter the steel-lined fluorine casing. That is to say, the stainless steel probe of the liquid level meter is located at the closing position of the end of the steel-lined fluorine casing. Under the action of the waveguide cable and its own weight, the stainless steel probe is confined in a narrow space and does not shake violently with the flow of the liquid in the kettle. In addition, the waveguide cable 5 and the stainless steel probe 6 are also coated with corrosion-resistant polytetrafluoroethylene (PTFE).

[0021] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A liquid stirring reactor input type liquid level meter device, characterized in that: The invention comprises a sleeve (3) vertically inserted into a reactor (9) having a stirring paddle (7) from above and into the reactor (9), and a liquid level meter capable of being installed in cooperation with the sleeve (3), wherein a liquid level meter head (1) of the liquid level meter is installed at the top of the sleeve and a waveguide cable (5) connected to the liquid level meter head (1) extends vertically to the bottom of the sleeve along the axis of the sleeve, a probe (6) connected to the bottom of the waveguide cable (5) is located at the bottom opening of the sleeve, and a gap is provided between the waveguide cable (5) and the sleeve (3) so that liquid (8) can enter the sleeve (3); the bottom opening of the sleeve (3) is configured as a conical opening, the probe (6) of the liquid level meter extends into the conical opening of the sleeve (3) and a gap is provided between the probe and the conical opening so that liquid can enter the sleeve (3); A pressure balancing tee (2) is provided on one side of the top of the sleeve (3), and the pressure balancing tee (2) is connected to nitrogen purge to prevent the formation of liquid beads on the inner wall of the steel-lined fluorine sleeve when the temperature of the highly corrosive liquid in the reactor is high.

2. The liquid stirring reactor input type liquid level meter device according to claim 1, characterized in that: The inner wall and the outer wall of the sleeve (3) are both coated with fluorine material (4).

3. The liquid stirring reactor input type liquid level meter device according to claim 1 or 2, characterized in that: The casing (3) is a steel pipe.

4. The liquid stirring reactor input type liquid level meter device according to claim 3, characterized in that: The waveguide cable (5) and the probe (6) are both coated with fluorine material.

5. The liquid stirring reactor input type liquid level meter device according to claim 4, characterized in that: The probe is a stainless steel probe.

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