Online pH value detection equipment and reaction system

Abstract

The utility model provides a pH value on-line detection equipment and reaction system, the pH value on-line detection equipment includes: imbibition diaphragm pump, pH value detector, imbibition pipe, liquid inlet hose, drainage hose, straight pipe, cylinder and cylinder support, the cylinder support is fixed above reactor, the cylinder body of cylinder (cylinder body close to piston one end) is fixed on the cylinder support top, and the cylinder body is fixed on the cylinder support top. The liquid suction pipe is vertically arranged in the air cylinder support in a penetrating mode, and a piston head of the air cylinder penetrates through the air cylinder support to be fixed to the top of the liquid suction pipe. The bottom of the liquid suction pipe is inserted into an interface sleeve at the top of the reactor, the upper part of the liquid suction pipe is communicated with the top of the reactor through a liquid inlet hose, a liquid suction diaphragm pump, a liquid discharge hose and a straight pipe in sequence, and a pH value detector is arranged in the liquid discharge hose. The detection equipment can ensure the accuracy of on-line detection, is suitable for on-line pH value detection of various solutions, and is particularly suitable for on-line pH value detection of liquid easy to crystallize.

Description

Technical Field

[0001] The utility model relates to a pH value online detection technology, in particular to a pH value online detection device and a reaction system. Background Art

[0002] Conventional pH testing is to take a small amount of samples to the laboratory for pH testing. With the development of science and technology, the materials being reacted in the reactor can be tested on-site and in real time through a set of specific pH testing devices, and the reaction materials can be adjusted in real time according to the test results. The advantage of this test is that the execution of the material pH value in the reaction process is fully reflected in the immediacy, uniformity, and accuracy of the normal value.

[0003] The traditional online pH value detection equipment for reactors includes a sampling pump, a sampling tube and a pH value detector. One end of the sampling tube is immersed in the liquid in the reactor. Under the action of the sampling pump, the liquid in the reactor is continuously sent to the pH value detector through the sampling tube to detect the pH value of the sample. When detecting liquids that are easy to crystallize, the sampling tube that penetrates into the liquid is prone to blockage due to crystallization, which in turn affects the detection of the pH value. That is, the traditional pH value detection equipment is not suitable for the detection of liquids that are easy to crystallize. Utility Model Content

[0004] The purpose of the utility model is to propose an online pH value detection device to address the problem that traditional pH value detection devices are not suitable for the detection of liquids that are easy to crystallize. The detection device can ensure the accuracy of online detection and is suitable for online pH value detection of various solutions, especially for online pH value detection of liquids that are easy to crystallize.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a pH value online detection device, including: a liquid suction diaphragm pump, a pH value detector, a liquid suction pipe, a liquid inlet hose, a liquid discharge hose, a straight pipe, a cylinder and a cylinder bracket, the cylinder bracket is fixed above the reactor, the cylinder body of the cylinder (the end of the cylinder body close to the piston) is fixed on the top of the cylinder bracket, the liquid suction pipe is vertically penetrated in the cylinder bracket, and the piston head of the cylinder passes through the cylinder bracket and is fixed to the top of the liquid suction pipe;

[0006] The bottom of the pipette is inserted into the interface sleeve at the top of the reactor, and the upper part of the pipette is connected with the top of the reactor through a liquid inlet hose, a liquid suction diaphragm pump, a liquid discharge hose, and a straight pipe in sequence. A pH value detector is arranged in the liquid discharge hose.

[0007] Furthermore, the reactor includes but is not limited to a reactor.

[0008] Furthermore, the cylinder support is a hollow rectangular frame, the top of which is used to support the cylinder and the inside of which is used to accommodate the pipette, and the bottom of the rectangular frame is fixed above the reactor.

[0009] Furthermore, the liquid suction tube is a hard pipe, and the hard pipe includes but is not limited to a PVC pipe or a stainless steel pipe.

[0010] Furthermore, the cylinder and the liquid suction tube are coaxially and vertically arranged.

[0011] Further, the stroke of the cylinder piston can ensure that the bottom end of the pipette is above the liquid surface when the pipette is raised, and below the liquid surface when the pipette is lowered. When the bottom end of the pipette is above the liquid surface when it is raised, the liquid detected last time in the pipette can be drained to prevent it from affecting the accuracy of the test result, and to avoid the liquid crystallization in the pipette. When it is lowered, the bottom end of the pipette is below the liquid surface, which can prevent the pipette from being emptied. Preferably, the stroke of the cylinder piston is 1000mm-1200mm.

[0012] Furthermore, the height of the cylinder support is greater than the cylinder stroke to ensure the cylinder piston connection space and the cylinder stroke. Preferably, the height of the cylinder support is greater than the cylinder piston stroke by 300 mm.

[0013] Furthermore, the pipette passes through the interface flange and maintains a gap of 0.5 mm to 1 mm with the interface sleeve at the top of the reactor, so as to slide up and down smoothly.

[0014] Furthermore, the pH value online detection device also includes a two-position five-way valve for controlling the lifting of the cylinder, a compressed air pressure regulating valve for controlling the lifting speed of the cylinder, and an air source pipeline, and the air source pipeline is connected to the cylinder through the compressed air pressure regulating valve and the two-position five-way valve. The compressed air pressure regulating valve can be adjusted and set according to the required lifting speed, usually set at 0.2MPa-0.3MPa.

[0015] Furthermore, the pH value online detection device also includes a control system, which is communicatively connected with the pH value detector and the cylinder drive, and is also communicatively connected with other liquid inlet valves of the reactor.

[0016] The working principle of the pH value online detection equipment of the utility model is as follows: at the beginning of the detection, the cylinder piston moves downward, driving the liquid suction tube 4 to penetrate into the liquid in the reactor 1; the liquid suction diaphragm pump 2 is turned on, and the liquid whose pH value is to be detected flows through the liquid suction tube 4, the liquid inlet hose 5, the liquid suction diaphragm pump 2, the liquid discharge hose 6 and the straight tube 7 in sequence, and finally returns to the reactor 1. The liquid is tested for pH when it flows through the pH value detector 3 located in the liquid discharge hose 6, and the detection result of the pH value detector 3 is fed back to the control system. The control system controls other liquid inlet valves on the reactor to adjust the pH value according to the detection result, so as to achieve the pH value index that meets the process requirements. At the end of the detection, the cylinder piston moves upward, driving the liquid suction tube 4 away from the liquid in the reactor 1, and draining the liquid in the liquid suction tube 4.

[0017] The lifting and lowering of the cylinder 8 is controlled by the compressed air source through the pressure regulating valve 10 to set the pressure to control the lifting speed of the cylinder. The compressed air enters the two-position five-way valve 9 and controls the lifting and lowering of the cylinder through the solenoid valve signal thereon.

[0018] Another purpose of the utility model is to disclose a reaction system with a pH value online detection function, including a reactor and the above-mentioned pH value online detection device, the bottom of the pipette 4 is inserted into the interface sleeve at the top of the reactor, and the straight tube 7 is arranged on the top of the reactor.

[0019] Furthermore, the reaction system with the pH value online detection function also includes an acid solution system and / or an alkali solution system, and the control system is communicatively connected with the acid solution system and the alkali solution system.

[0020] Compared with the prior art, the pH value online detection device and reaction system of the utility model have the following advantages:

[0021] 1) The pH value online detection device of the utility model can perform real-time detection on different materials in the reactor at different time periods during the reaction process.

[0022] 2) The utility model can ensure the accuracy of online detection and is suitable for online pH value detection of various solutions, especially for online pH value detection of liquids prone to crystallization.

[0023] At the end of the test, the bottom of the pipette is above the liquid surface, which can drain the liquid from the last test in the pipette to prevent it from affecting the accuracy of the test results and prevent the liquid from crystallizing in the pipette. At the beginning of the test, the bottom of the pipette is below the liquid surface to prevent the pipette from being emptied. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a reaction system with the function of online pH value detection. DETAILED DESCRIPTION

[0025] The present invention is further described below with reference to the embodiments:

[0026] Example 1

[0027] This embodiment discloses a pH value online detection device, such as Figure 1 As shown, it includes: a liquid suction diaphragm pump 2, a pH value detector 3, a liquid suction tube 4, a liquid inlet hose 5, a liquid discharge hose 6, a straight tube 7, a cylinder 8 and a cylinder bracket.

[0028] The cylinder support is a hollow rectangular frame, the top of which is used to support the cylinder 8, and the inside is used to accommodate the pipette 4. The bottom of the rectangular frame is fixed above the reactor 1. The cylinder body of the cylinder 8 (the end of the cylinder body close to the piston) is fixed on the top of the cylinder support, and the pipette 4 is vertically penetrated in the cylinder support. The piston head of the cylinder 8 passes through the cylinder support and is fixed to the top of the pipette 4; the cylinder 8 is coaxial and vertically arranged with the pipette 4. The height of the cylinder support is greater than the cylinder stroke to ensure the cylinder piston connection space and cylinder stroke. The height of the cylinder support described in this embodiment is greater than the cylinder piston stroke of 300mm. The stroke of the piston of the cylinder 8 can ensure that the bottom end of the pipette 4 is located on the liquid surface when the pipette 4 is raised, and the bottom end of the pipette 4 is located below the liquid surface when the pipette 4 is lowered. When the bottom end of the pipette 4 is raised, it is located on the liquid surface, and the liquid detected in the last time in the pipette can be drained to prevent it from affecting the accuracy of the test results and avoid crystallization of the liquid in the pipette 4. When descending, the bottom end of the pipette 4 is located below the liquid surface, which can prevent the pipette 4 from being emptied.

[0029] The pipette 4 is a PVC tube. The bottom of the pipette 4 is inserted into the interface sleeve at the top of the reactor. The pipette 4 passes through the interface flange and maintains a gap of 0.5mm-1mm with the interface sleeve at the top of the reactor, so that it can slide up and down smoothly. The upper part of the pipette 4 is connected to the top of the reactor through the liquid inlet hose 5, the liquid suction diaphragm pump 2, the liquid discharge hose 6, and the straight pipe 7 in sequence. The pH value detector 3 is arranged in the liquid discharge hose 6.

[0030] The pH value online detection device also includes a two-position five-way valve 9 for controlling the lifting of the cylinder, a compressed air pressure regulating valve 10 for controlling the lifting speed of the cylinder, and an air source pipeline, and the air source pipeline is connected to the cylinder 8 through the compressed air pressure regulating valve 10 and the two-position five-way valve 9. The compressed air pressure regulating valve 10 can be adjusted and set according to the required lifting speed, usually set at 0.2MPa-0.3MPa.

[0031] The pH value online detection device also includes a control system, which is connected to the pH value detector 3 and the cylinder 8 for driving communication.

[0032] The working principle of the online pH value detection equipment of this embodiment is as follows: when the detection starts, the cylinder piston moves downward, driving the pipette 4 to penetrate into the liquid in the reactor 1; the pipette diaphragm pump 2 is turned on, and the liquid whose pH value is to be detected flows through the pipette 4, the liquid inlet hose 5, the pipette diaphragm pump 2, the liquid discharge hose 6 and the straight pipe 5 in sequence, and finally returns to the reactor 1. The liquid is tested for pH when it flows through the pH value detector 3 located in the liquid discharge hose 6. The detection result of the pH value detector 3 is fed back to the control system, and the control system controls the other liquid inlet valves on the reactor to adjust the pH value according to the detection result, so as to achieve the pH value index that meets the process requirements. When the detection is finished, the cylinder piston moves upward, driving the pipette 4 away from the liquid in the reactor 1, and draining the liquid in the pipette 4.

[0033] The lifting and lowering of the cylinder 8 is controlled by the compressed air source through the pressure regulating valve 10 to set the pressure to control the lifting speed of the cylinder. The compressed air enters the two-position five-way valve 9 and controls the lifting and lowering of the cylinder through the solenoid valve signal thereon.

[0034] Example 2

[0035] This embodiment discloses a reaction system with a pH value online detection function, such as Figure 1 As shown, it includes an acid system, an alkali system, a reactor and the pH value online detection device described in Example 1 above, the bottom of the liquid pipette 4 is inserted into the interface sleeve at the top of the reactor, and the straight pipe 7 is arranged at the top of the reactor. The control system is connected to the acid system and the alkali system for communication. The reaction system with the pH value online detection function of this embodiment can adjust the material ratio and other parameters in real time according to the deviation of the pH value detected in real time to produce qualified products.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A pH value online detection device, It is characterized in that include: A liquid suction diaphragm pump (2), a pH value detector (3), a liquid suction pipe (4), a liquid inlet hose (5), a liquid discharge hose (6), a straight pipe (7), a cylinder (8) and a cylinder bracket, wherein the cylinder bracket is fixed above the reactor, an end of the cylinder body of the cylinder (8) close to the piston is fixed to the top of the cylinder bracket, the liquid suction pipe (4) is vertically inserted into the cylinder bracket, and the piston head of the cylinder passes through the cylinder bracket and is fixed to the top of the liquid suction pipe (4); The bottom of the liquid suction pipe (4) is inserted into the interface sleeve at the top of the reactor, and the upper part of the liquid suction pipe (4) is connected to the top of the reactor through a liquid inlet hose (5), a liquid suction diaphragm pump (2), a liquid discharge hose (6), and a straight pipe (7) in sequence, and a pH value detector (3) is arranged in the liquid discharge hose (6).

2. According to the pH value online detection device of claim 1, It is characterized in that The cylinder support is a hollow rectangular frame, and the bottom of the rectangular frame is fixed above the reactor.

3. According to the pH value online detection device of claim 1, It is characterized in that The liquid suction tube (4) is a hard pipe.

4. The pH value online detection device according to claim 1 or 3, It is characterized in that The cylinder (8) and the liquid suction tube (4) are coaxially and vertically arranged.

5. According to the pH value online detection device of claim 1, It is characterized in that The stroke of the piston of the air cylinder (8) can ensure that when the pipette (4) is raised, the bottom end of the pipette (4) is located above the liquid surface, and when the pipette (4) is lowered, the bottom end of the pipette (4) is located below the liquid surface.

6. The pH value online detection device according to claim 1, It is characterized in that The height of the cylinder support is greater than the cylinder stroke.

7. The pH value online detection device according to claim 1, It is characterized in that The liquid pipette (4) maintains a gap of 0.5 mm to 1 mm with the interface sleeve at the top of the reactor.

8. The pH value online detection device according to claim 1, It is characterized in that The pH value online detection device also includes a control system, which is connected to the pH value detector (3) and the cylinder (8) in a driving communication manner.

9. A reaction system with online pH detection function, It is characterized in that It comprises a reactor and the pH value online detection device according to any one of claims 1 to 8, wherein the bottom of the pipette (4) is inserted into the interface sleeve at the top of the reactor, and the straight tube (7) is arranged at the top of the reactor.

10. The reaction system with pH value online detection function according to claim 9, It is characterized in that It also includes an acid solution system and / or an alkali solution system, and the control system is communicatively connected with the acid solution system and the alkali solution system.

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