A rapid detection device and method for the content of effective components in waste oil and fat

Abstract

The present invention provides a rapid detection device and method for the effective component content of waste oil and grease, and belongs to the technical field of effective component detection methods for waste oil and grease. It comprises a double-liquid titration component and a bottom kettle body, wherein a tempered glass cylinder is installed on the top of the bottom kettle body, the bottom of the double-liquid titration component is located inside the tempered glass cylinder, and an annular electrolytic plate is arranged inside the tempered glass cylinder. The present invention adds sodium hydroxide titration solution into the liquid storage area and liquid mercury titration solution into the feeding kettle, and uses a double adjustment mechanism to control the titration amount of sodium hydroxide and liquid mercury to titrate the sample respectively, thereby detecting the glycerin purity and heavy metals in the sample respectively, so as to solve the problem that the existing cosmetics prepared from waste oil have safety hazards, and the existing detection device cannot meet the problem of simultaneous detection of glycerin purity and heavy metals in waste oil.

Description

Technical Field

[0001] The invention relates to the technical field of waste grease effective component detection methods, and in particular to a waste grease effective component content rapid detection device and detection method. Background Art

[0002] Gutter oil is originally made from used edible oil, so it contains triglycerides, especially higher fatty acid glycerides, which can be decomposed into higher fatty acids and glycerol once separated. Glycerol is the essential raw material for making soap, external ointments, textile lubricants, cosmetic wetting agents and other daily necessities and industrial products.

[0003] In the cosmetics manufacturing industry, waste oil is mainly used in the production of cheap artificial emollients, artificial vegetable oils and other cheap cosmetic raw materials. Because the price of waste oil is relatively cheap, many bad manufacturers can utilize waste oil to replace expensive natural raw materials, which has also caused some inferior cosmetics to circulate in large quantities on the market. When waste oil is needed to prepare cosmetics, it is necessary to detect the glycerol purity in the waste oil, and simultaneously, there is also a potential safety hazard in the use of waste oil as a cosmetic raw material, it contains many harmful substances, such as heavy metals such as lead and mercury, which cause great harm to human health, therefore if the glycerol purity and heavy metals in the waste oil are not detected, and waste oil is used to prepare cosmetics, the skin of the user will be damaged, and simultaneously, the existing detection device cannot satisfy the simultaneous detection of the glycerol purity and heavy metals in the waste oil, and if multiple groups of detection devices are adopted to detect each component in the waste oil respectively, the detection efficiency can be reduced, and multiple sampling is needed simultaneously, which affects the test result.

[0004] Therefore, the present application provides a rapid detection device and method for the content of effective ingredients in waste oil and fat to meet the needs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a rapid detection device and method for the effective component content of waste oil and fat. By adding sodium hydroxide titration solution into a liquid storage area and adding liquid mercury titration solution into a feeding kettle, a double adjustment mechanism is used to control the titration amount of sodium hydroxide and liquid mercury to titrate the sample respectively, so as to detect the glycerin purity and heavy metals in the sample respectively, so as to solve the problem that the existing cosmetics prepared from waste oil have safety hazards and the existing detection device cannot meet the problem of simultaneous detection of glycerin purity and heavy metals in waste oil.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A rapid detection device and method for the effective component content of waste grease, comprising a double-liquid titration component and a bottom kettle body, wherein a tempered glass cylinder is installed on the top of the bottom kettle body, the bottom of the double-liquid titration component is located inside the tempered glass cylinder, and an annular electrolytic plate is arranged inside the tempered glass cylinder;

[0008] The double-liquid titration component includes a double kettle body, and the double kettle body is composed of an outer kettle body and an inner kettle body. An inner thread groove is provided on the inner wall of the inner kettle body of the double kettle body. A double adjustment mechanism is connected to the inner kettle body of the double kettle body. A liquid storage area is provided between the outer wall of the double kettle body and the outer wall of the inner kettle body. A liquid inlet is provided at the bottom of the inner kettle body of the double kettle body. The liquid inlet is provided in multiple groups and is evenly distributed on the inner kettle body. The liquid storage area is connected to the inner kettle body of the double kettle body through the multiple groups of liquid inlets. A feeding kettle is sealed and fixedly installed on the top of the double kettle body, and the feeding kettle coincides with the center line of the double kettle body.

[0009] Optionally, the double-adjustment mechanism includes a sealing cylinder, the top outer wall of the sealing cylinder is sealingly sleeved with an outer sleeve, the bottom outer wall of the outer sleeve is provided with an external thread, the external thread is engaged with the internal thread groove, and the outer sleeve is rotatably connected to the inner kettle body in the double kettle body, an outer copper ring is provided at the center of the top of the sealing cylinder, and holes are provided on both sides of the top of the outer copper ring, two groups of the holes pass through the sealing cylinder and the outer sleeve, and plug posts are inserted in the two groups of the holes, and the outer sleeve, the sealing cylinder and the outer copper ring are fixedly connected by the plug posts.

[0010] Optionally, the outer wall of the bottom of the sealing cylinder is provided with multiple groups of conducting ports, and the multiple groups of conducting ports are movably connected to the liquid inlet, the outer wall of the bottom of the sealing cylinder is in sealing and movable contact with the inner wall of the bottom of the inner kettle body in the double kettle body, and a limiting ring is fixedly installed on the middle outer wall of the sealing cylinder, and the bottom of the limiting ring is in movable contact with the middle inner wall of the inner kettle body in the double kettle body.

[0011] Optionally, a support ring is sealed and fixedly connected to the inner wall of the top of the double kettle body, an inner copper ring is fixedly installed on the bottom of the support ring, the inner copper ring coincides with the center line of the support ring, and the inner copper ring is located inside the outer copper ring, the outer wall of the inner copper ring is in sealing and movable contact with the inner wall of the outer copper ring, the side wall of the inner copper ring is provided with an inner drainage groove, the side wall of the outer copper ring is provided with an outer drainage groove, and the inner drainage groove and the outer drainage groove are movably matched.

[0012] Optionally, a positioning tube is fixedly installed at the center of the bottom of the inner copper ring, and the positioning tube seals and passes through the bottom of the inner copper ring. A liquid inlet ring is provided between the inner wall of the support ring and the positioning tube, and the liquid inlet ring is connected to the interior of the inner copper ring. The feeding kettle is filled with liquid mercury, and the top position of the liquid mercury is smaller than the top surface of the positioning tube.

[0013] Optionally, a rotating tube is movably connected to the inner wall of the positioning tube, a cross is fixedly installed on the outer wall of the bottom of the rotating tube, the outer wall of the cross is fixedly connected to the inner wall of the bottom of the sealing tube, and the sealing tube is fixedly connected to the rotating tube through the cross, a turning handle is fixedly installed on the top side wall of the rotating tube, and a vibrating needle is movably connected to the inner wall of the rotating tube.

[0014] Optionally, a liquid discharge hopper is sealed and fixedly installed at the bottom of the inner kettle body in the double kettle body, a burette is sealed and fixedly connected to the bottom of the liquid discharge hopper, the vibrating needle is located in the liquid discharge hopper and the burette, and coincides with the center line of the burette, the vibrating needle is in active contact with the inner wall of the burette, a liquid adding tank is fixedly installed on the side wall of the double kettle body, and the liquid adding tank is connected to the inside of the liquid storage area, an electromagnetic valve is fixedly installed on the bottom of the double kettle body, and the input end of the electromagnetic valve is connected to the inside of the liquid storage area, a top support plate is fixedly installed on the top of the feeding kettle, and a trigger component is provided on the top support plate.

[0015] Optionally, the trigger component includes a cross rotor, the bottom of the cross rotor is fixedly connected to the top of the vibrating needle, support plates are fixedly installed on the four sides of the top of the top support plate, the inner walls of the four groups of support plates are rotatably connected to the receiving cylinder, the four side walls of the cross rotor are rotatably connected to the rotating rod, the rotating rod is located inside the corresponding receiving cylinder, a sliding plug is fixedly installed on the end wall of the rotating rod, and the sliding plug is slidably connected to the inner wall of the receiving cylinder, a spring is sleeved on the rotating rod located inside the receiving cylinder, one end of the spring is fixedly connected to the corresponding side wall of the sliding plug, and the other end of the spring is fixedly connected to the inner end wall of the receiving cylinder, the same cylinder is fixedly installed on the top of the four groups of support plates, and the output end of the cylinder is in movably contact with the top of the cross rotor.

[0016] Optionally, the tempered glass cylinder is fixedly connected to the top of the bottom kettle body and is internally connected, the annular electrolytic plate is fixedly connected to the inner wall of the tempered glass cylinder, the outer wall of the bottom of the double kettle body is sealed to pass through the top of the tempered glass cylinder and is fixedly connected to the tempered glass cylinder, the outer wall of the bottom kettle body is fixedly installed with a liquid inlet pipe and a liquid outlet pipe, the inner wall of the bottom of the bottom kettle body is rotatably connected to a stirring rod, a motor is fixedly installed at the bottom of the bottom kettle body, and the output end of the motor is fixedly connected to the stirring rod.

[0017] Optionally, a detection method of a rapid detection device for the content of effective components in waste oil and grease also includes the following specific operating steps:

[0018] S1: The waste oil is precipitated. After a period of time, 50g of the floating oil sample on the upper layer is taken and placed inside the bottom kettle body through the liquid inlet pipe. Thereafter, distilled water is added to the bottom kettle body through the liquid inlet pipe to 2.5L. The motor is driven to drive the stirring rod to mix and stir the floating oil sample at the bottom of the bottom kettle body. Thereafter, 0.05mol / L of sodium hydroxide solution is added to the stirring liquid through the liquid inlet pipe to adjust the pH value of the mixed liquid to 7.8-8;

[0019] S2: After that, 50 mL of sodium periodate solution is accurately added to the mixed solution through the liquid inlet tube, and the device is placed in a dark place for 30 minutes. After that, 10 mL of 50% ethylene glycol solution is added to the mixed solution, and the device is placed in a dark place for 20 minutes.

[0020] S3: After the standing is completed, 5 ml of 1 mol / L sodium formate solution is added to the mixed liquid through the liquid inlet pipe, and a few drops of phenol solution indicator are added, and then 0.125 mol / L sodium hydroxide solution is added to the liquid storage area through the liquid adding tank. At this time, the solution in the liquid storage area enters the interior of the sealing cylinder through the liquid inlet and the conducting port. At this time, the vibrating needle is vibrated by the trigger component, and the liquid in the liquid discharge bucket is allowed to enter the burette by controlling the vibration of the vibrating needle. The liquid in the burette is allowed to drip into the bottom kettle body by the vibration of the vibrating needle. The pH value of the mixed liquid is determined by observing the color change of the mixed liquid. When the solution changes color completely, the titration end point is reached, and the pH value is 7.7~8.1. At this time, the amount of sodium hydroxide used is recorded as V1, and the mass of the added floating oil sample is m;

[0021] S4: Use 50ml of water instead of the sample to do a blank experiment. Before adding sodium periodate, adjust the pH to 6.5 by titration. After that, the titration endpoint pH is 6.5. Record the amount of sodium hydroxide used at this time as V2. According to the formula X=(9.21*0.125*(V1-V2) / m%), the purity of glycerol in the oil spill sample can be obtained;

[0022] S5: After the purity test of glycerol in the floating oil sample is completed, washing water is added to the liquid adding tank, and the solenoid valve is opened at the same time, so as to wash the sodium hydroxide solution in the liquid storage area and the double kettle body. After the washing is completed, liquid water is injected into the bottom kettle body through the liquid inlet pipe, and the excess washing water in the liquid discharge hopper is discharged through the trigger component, so that the water level in the bottom kettle body just overflows the annular electrolytic plate;

[0023] S6: 220V AC is sent to the annular electrolytic plate through a high resistor of 1 megohm, and at the same time, the trigger component is driven to drive the vibrating needle to vibrate to control the dripping of mercury drops. Mercury forms mercury drops from the lower end of the burette and falls into the tempered glass cylinder. Under the action of gravity, the diameter of the mercury drops dripping from the bottom of the burette is 1mm. The mercury drops dripping due to gravity electrolyze and deposit heavy metal ions under a constant potential, enrich them on the annular electrolytic plate and form amalgam;

[0024] S7: Drive the stirring rod to stir the mixed liquid at a constant stirring speed, increase the pre-electrolysis time for a given metal ion, that is, after the enrichment is completed, stand still for 30s or 60s, then apply a reverse voltage to the annular electrolytic plate, scan from negative to positive, re-oxidize the metal in the amalgam into ions and return to the solution, generate oxidation current, then record the voltage and current curves by an external computer, and perform data detection on the heavy metal content in the sample in the tempered glass tube.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] In the above scheme, after the waste oil is precipitated, 50g of the floating oil sample on the upper layer is taken and diluted with distilled water, and then 0.05mol / L sodium hydroxide solution is added to adjust the pH value of the mixed solution to 7.8-8, and then an appropriate amount of sodium periodate and ethylene glycol solution are added to react in a dark place, and finally an appropriate amount of sodium formate solution and phenol solution indicator are added, and titration detection is performed by a double liquid titration component, and the amount of sodium hydroxide used to change the color of the phenol solution indicator is recorded. After that, a comparative experiment is performed, and the purity of glycerol in the floating oil sample is calculated according to the formula. After that, alternating current is introduced into the annular electrolytic plate, and mercury drops are dripped into the sample by the double liquid titration component, so that the heavy metal ions are electrolytically deposited, enriched on the annular electrolytic plate and generate amalgam, and then a reverse voltage is applied to the annular electrolytic plate, and scanning from negative to positive generates oxidation current, and the voltage and current curves are recorded by an external computer, and the heavy metal content in the sample in the tempered glass cylinder is detected.

[0027] When the purity of glycerol is tested, the outer sleeve is located at the top of the double kettle body, that is, the liquid inlet and the conduction port can introduce the sodium hydroxide titration solution in the liquid storage area into the sealing cylinder, and the titration test can be carried out. When the heavy metal ions are tested, the user manually rotates the handle to drive the rotating tube to rotate. At this time, the rotating tube can drive the sealing cylinder to rotate through the cross. Under the limiting effect of the plug column, the sealing cylinder can drive the outer sleeve and the outer copper ring to rotate. When the outer sleeve rotates, the external thread on the outer sleeve can be engaged with the internal thread groove, so that the sealing cylinder moves downward as a whole, so that the side wall of the sealing cylinder blocks the liquid inlet, and prevents the sodium hydroxide solution in the liquid storage area from affecting the test result. At the same time, when the outer copper ring rotates, the outer liquid drainage groove on the outer copper ring overlaps with the inner liquid drainage groove on the inner copper ring, so that the mercury liquid in the inner copper ring enters the bottom of the sealing cylinder through the overlap port to carry out titration test. Therefore, the device can carry out two titration experiments respectively, avoid repeated sampling, and improve the detection efficiency and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of a rapid detection device for the content of effective components in waste oils and fats;

[0030] Figure 2 This is a disassembled diagram of a device for rapid detection of the effective component content of waste oil;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the double liquid titration component;

[0032] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0033] Figure 5 is a structural schematic diagram of a trigger component;

[0034] Figure 6 This is the installation position diagram of the double adjustment mechanism;

[0035] Figure 7 It is a cross-sectional view of a double kettle body;

[0036] Figure 8 This is a schematic diagram of the principle of detecting the purity of glycerol in a sample;

[0037] Fig. 9 The principle structure diagram for detecting heavy metals in samples;

[0038] Fig.10 This is the installation position diagram of the inner copper ring;

[0039] Fig.11 It is a partial cross-sectional view of the double adjustment mechanism;

[0040] Fig.12 This is a disassembled diagram of the double adjustment mechanism;

[0041] Fig.13 Schematic diagram of the internal structure of the sealing cylinder;

[0042] Fig.14 This is a disassembled diagram of the components on the sealing cylinder;

[0043] Fig.15 This is the installation diagram of each component on the support ring;

[0044] Fig.16 It is a schematic diagram of the installation structure of the rotating tube and the vibrating needle.

[0045] Reference numerals:

[0046] Double liquid titration assembly 100, double kettle body 110, internal thread groove 111, liquid storage area 112, liquid inlet 113, liquid adding tank 114, solenoid valve 115, liquid discharge bucket 116, burette 117, top support plate 118, feeding kettle 120, double adjustment mechanism 130, sealing cylinder 131, conduction port 132, limit ring 133, outer sleeve 134, external thread 135, outer copper ring 136, socket 137, plug column 138, external liquid discharge groove 139, support ring 140, inner Copper ring 141, inner drainage groove 142, liquid inlet ring 143, positioning tube 144, rotating tube 150, rotating handle 151, cross 152, vibrating needle 160, trigger component 170, cross rotating head 171, support plate 172, rotating cylinder 173, rotating rod 174, sliding plug 175, spring 176, cylinder 180, bottom kettle body 200, tempered glass cylinder 210, liquid inlet pipe 220, liquid outlet pipe 230, stirring rod 240, motor 250, annular electrolytic plate 260.

[0047] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0048] The following is a detailed description of a rapid detection device and method for the effective component content of waste grease provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0049] like Figure 1 and Fig.10 As shown, an embodiment of the present invention provides a rapid detection device and method for the effective component content of waste oil and fat, including a double-liquid titration component 100 and a bottom kettle body 200, a tempered glass cylinder 210 is installed on the top of the bottom kettle body 200, the bottom of the double-liquid titration component 100 is located inside the tempered glass cylinder 210, an annular electrolytic plate 260 is provided inside the tempered glass cylinder 210, a power supply is provided outside the tempered glass cylinder 210, and the power supply can power the annular electrolytic plate 260, and a computer is arranged outside the device to monitor the ion discharge phenomenon inside the tempered glass cylinder 210.

[0050] The double-liquid titration assembly 100 includes a double kettle body 110, and the double kettle body 110 is composed of an outer kettle body and an inner kettle body. The inner wall of the inner kettle body of the double kettle body 110 is provided with an internal thread groove 111. The inner kettle body of the double kettle body 110 is connected with a double adjustment mechanism 130. A liquid storage area 112 is provided between the inner wall of the outer kettle body of the double kettle body 110 and the outer wall of the inner kettle body. A liquid inlet 113 is provided at the bottom of the inner kettle body of the double kettle body 110. The liquid storage area 112 is a sealed area, and the inside of the double kettle body 110 can only be entered through the liquid inlet 113. The liquid inlet 113 There are multiple groups of them evenly distributed on the inner kettle body. The liquid storage area 112 is connected with the inner kettle body of the double kettle body 110 through multiple groups of liquid inlets 113. A feeding kettle 120 is sealed and fixedly installed on the top of the double kettle body 110, and the feeding kettle 120 coincides with the center line of the double kettle body 110. The feeding kettle 120 is filled with mercury liquid. A 0.125 mol / L sodium hydroxide solution is provided in the liquid storage area 112, and the mercury liquid and the sodium hydroxide solution can be added to the inside of the sealing cylinder 131 respectively through different operation methods without interference.

[0051] As an implementation method in this embodiment, Fig.13 and Fig.14 As shown, the double adjustment mechanism 130 includes a sealing cylinder 131, and the top outer wall of the sealing cylinder 131 is sealingly sleeved with an outer sleeve 134, and the bottom outer wall of the outer sleeve 134 is provided with an external thread 135, the external thread 135 is meshed with the internal thread groove 111, and the outer sleeve 134 is rotatably connected to the inner kettle body in the double kettle body 110, and an outer copper ring 136 is provided at the center of the top of the sealing cylinder 131, and holes 137 are provided on both sides of the top of the outer copper ring 136, and two groups of holes 137 both penetrate the sealing cylinder 131 and the outer sleeve 134, and plug posts 138 are inserted in the two groups of holes 137, and the outer sleeve 134, the sealing cylinder 131 and the outer copper ring 136 are fixedly connected by the plug posts 138.

[0052] The outer wall at the bottom of the sealing cylinder 131 is provided with a plurality of groups of conducting ports 132, and the plurality of conducting ports 132 are movably connected with the liquid inlet 113. When the conducting ports 132 are connected with the liquid inlet 113, the sodium hydroxide solution in the liquid storage area 112 can enter the sealing cylinder 131 through the conducting ports 132 and the liquid inlet 113. The outer wall at the bottom of the sealing cylinder 131 is in sealing and movable contact with the inner wall at the bottom of the inner kettle body in the double kettle body 110. When the sealing cylinder 131 moves downward so that the conducting ports 132 and the liquid inlet 113 are offset, the sodium hydroxide solution in the liquid storage area 112 cannot enter the sealing cylinder 131. A limiting ring 133 is fixedly installed on the outer wall at the middle part of the sealing cylinder 131, and the bottom of the limiting ring 133 is in movably contact with the inner wall at the middle part of the inner kettle body in the double kettle body 110. The limiting ring 133 limits the downward movement of the sealing cylinder 131 to prevent the external thread 135 from over-matching with the internal thread groove 111.

[0053] In this embodiment, if Figures 10 to 16As shown, a support ring 140 is sealed and fixedly connected to the inner wall of the top of the double kettle body 110, and an inner copper ring 141 is fixedly installed at the bottom of the support ring 140. The inner copper ring 141 coincides with the center line of the support ring 140, and the inner copper ring 141 is located inside the outer copper ring 136. The outer wall of the inner copper ring 141 is in sealing and movable contact with the inner wall of the outer copper ring 136. An inner liquid drainage groove 142 is provided on the side wall of the inner copper ring 141, and an outer liquid drainage groove 139 is provided on the side wall of the outer copper ring 136, and the inner liquid drainage groove 142 and the outer liquid drainage groove 139 are movably matched.

[0054] A positioning tube 144 is fixedly installed at the center of the bottom of the inner copper ring 141, and the positioning tube 144 seals and penetrates the bottom of the inner copper ring 141. A liquid inlet ring 143 is provided between the inner wall of the support ring 140 and the positioning tube 144, and the liquid inlet ring 143 is communicated with the inside of the inner copper ring 141. The inside of the feeding kettle 120 is filled with liquid mercury, and the top position of the liquid mercury is smaller than the top surface of the positioning tube 144. The top surface of the mercury liquid is smaller than the top surface of the positioning tube 144, which can prevent the mercury liquid from entering the positioning tube 144, thereby interfering with the detection result.

[0055] The inner wall of the positioning tube 144 is movably connected to a rotating tube 150, a cross 152 is fixedly installed on the outer wall at the bottom of the rotating tube 150, the outer wall of the cross 152 is fixedly connected to the inner wall at the bottom of the sealing tube 131, and the sealing tube 131 is fixedly connected to the rotating tube 150 through the cross 152, a rotating handle 151 is fixedly installed on the top side wall of the rotating tube 150, and a vibrating needle 160 is movably connected to the inner wall of the rotating tube 150.

[0056] A liquid discharge hopper 116 is sealed and fixedly installed at the bottom of the inner kettle body in the double kettle body 110, and a burette 117 is sealed and fixedly connected to the bottom of the liquid discharge hopper 116. A vibrating needle 160 is located in the liquid discharge hopper 116 and the burette 117, and coincides with the center line of the burette 117. The vibrating needle 160 is in active contact with the inner wall of the burette 117. A liquid adding tank 114 is fixedly installed on the side wall of the double kettle body 110, and the liquid adding tank 114 is connected to the inside of the liquid storage area 112. A solenoid valve 115 is fixedly installed at the bottom of the double kettle body 110, and the input end of the solenoid valve 115 is connected to the inside of the liquid storage area 112. A top support plate 118 is fixedly installed on the top of the feeding kettle 120. A trigger member 170 is provided on the top support plate 118. In the present invention, when the glycerol content in the sample needs to be detected, the waste oil is precipitated, and 50g of the floating oil sample on the upper layer is taken and placed inside the bottom kettle body 200 through the liquid inlet pipe 220. Thereafter, distilled water is added to the bottom kettle body 200 to 2.5L through the liquid inlet pipe 220, and the motor 250 is driven to drive the stirring rod 240 to mix and stir the floating oil sample at the bottom of the bottom kettle body 200. Thereafter, 0.05mol / L of sodium hydroxide solution is added to the stirring liquid through the liquid inlet pipe 220 to adjust the pH value of the mixed liquid to 7.8-8. , accurately add 50mL of sodium periodate solution into the mixed solution through the liquid inlet pipe 220, and place the device in a dark place for 30 minutes, then add 10mL of 50% ethylene glycol solution into the mixed solution, and let it stand in a dark place for 20 minutes. After the standing is completed, add 5mL of 1mol / L sodium formate solution into the mixed solution through the liquid inlet pipe 220, and add a few drops of phenol solution indicator, then add 0.125mol / L sodium hydroxide solution into the liquid storage area 112 through the liquid adding tank 114. At this time, the solution in the liquid storage area 112 is connected to the conduction port 132 through the liquid inlet port 113. Enter the sealing cylinder 131. At this time, the vibrating needle 160 is vibrated by the trigger component 170. The liquid in the liquid discharge bucket 116 is allowed to enter the burette 117 by controlling the vibration of the vibrating needle 160. The liquid in the burette 117 is allowed to drip into the bottom kettle body 200 by the vibration of the vibrating needle 160. The pH value of the mixed liquid is determined by observing the color change of the mixed liquid. When the solution changes color completely, the titration end point is reached, and the pH value is 7.7-8.1. At this time, the amount of sodium hydroxide used is recorded as V1, and the mass of the added floating oil sample is m. After that, a comparative experiment is carried out to calculate the purity of glycerol in the sample.

[0057] As an implementation method in this embodiment, Figures 3 to 5As shown, the triggering member 170 includes a cross-shaped rotating head 171, the bottom of the cross-shaped rotating head 171 is fixedly connected to the top of the vibrating needle 160, and the four sides of the top of the top support plate 118 are fixedly installed with support plates 172. The inner walls of the four groups of support plates 172 are rotatably connected to the receiving rotating cylinder 173. The four side walls of the cross-shaped rotating head 171 are rotatably connected to the rotating rod 174, and the rotating rod 174 is located inside the corresponding receiving rotating cylinder 173. A sliding plug 175 is fixedly installed at the end of the rotating rod 174, and the sliding plug 175 is slidably connected to the inner wall of the receiving rotating cylinder 173. A spring 176 is sleeved on the rotating rod 174 located inside the receiving rotating cylinder 173, and one end of the spring 176 is fixedly connected to the side wall of the corresponding sliding plug 175, and the other end of the spring 176 is fixedly connected to the receiving rotating cylinder 1 The inner end wall of 73 is fixedly connected, and the same cylinder 180 is fixedly installed on the top of the four groups of support plates 172. The output end of the cylinder 180 is in active contact with the top of the cross turntable 171. The working principle of the trigger component 170 in the present invention is that the cross turntable 171 is pressed by driving the cylinder 180, thereby driving the vibrating needle 160 to move downward. At this time, the rotating cylinder 173 is deflected downward, and the spring 176 in the rotating cylinder 173 is compressed. When the cylinder 180 retracts, the spring 176 in the rotating cylinder 173 will drive the cross turntable 171 to deflect upward under the restoring action of the elastic force, thereby driving the vibrating needle 160 to move upward, and the vibrating needle 160 is reciprocated by driving the cylinder 180 back and forth.

[0058] As an implementation method in this embodiment, Figure 1 and Figure 2As shown, the tempered glass cylinder 210 is fixedly connected to the top of the bottom kettle body 200 and is internally connected, the annular electrolytic plate 260 is fixedly connected to the inner wall of the tempered glass cylinder 210, the outer wall of the bottom of the double kettle body 110 is sealed to pass through the top of the tempered glass cylinder 210, and is fixedly connected to the tempered glass cylinder 210, the outer wall of the bottom kettle body 200 is fixedly installed with a liquid inlet pipe 220 and a liquid outlet pipe 230, and all liquid samples inside the device can be discharged from the liquid outlet pipe 230, the inner wall of the bottom of the bottom kettle body 200 is rotatably connected with a stirring rod 240, the bottom of the bottom kettle body 200 is fixedly installed with a motor 250, and the output end of the motor 250 is fixedly connected to the stirring rod 240. In the figure, when it is necessary to detect heavy metal ions in the sample, the user manually rotates the handle 151 to drive the rotating tube 150 to rotate. At this time, the rotating tube 150 can drive the sealing cylinder 131 to rotate through the cross 152. Under the limiting effect of the plug 138, the sealing cylinder 131 can drive the outer sleeve 134 and the outer copper ring 136 to rotate. When the outer sleeve 134 rotates, the external thread 135 on the outer sleeve 134 can mesh with the internal thread groove 111, so that the sealing cylinder 131 moves downward as a whole, so that the side wall of the sealing cylinder 131 blocks the liquid inlet 113, preventing the NaO in the liquid storage area 112 from being blocked. H solution affects the test results. At the same time, when the outer copper ring 136 rotates, the outer drainage groove 139 on the outer copper ring 136 overlaps with the inner drainage groove 142 on the inner copper ring 141, so that the mercury liquid in the inner copper ring 141 enters the bottom of the sealing tube 131 through the overlapped opening. At this time, 220 volts of alternating current is sent to the annular electrolytic plate 260 through a high resistance of 1 megohm, and at the same time, the trigger component 170 is driven to drive the vibrating needle 160 to vibrate to control the dripping of mercury drops. Mercury drops from the lower end of the burette 117 into the tempered glass tube 210. Under the action of gravity, the diameter of the mercury drops dripping from the bottom of the burette 117 is 1 mm. The mercury drops dripping due to gravity electrolyze and deposit heavy metal ions at a constant potential, enrich them on the annular electrolytic plate 260 and generate amalgam, drive the stirring rod 240 to drive the mixed liquid to stir at a constant stirring speed, increase the pre-electrolysis time for a given metal ion, that is, after the enrichment is completed, stand still for 30s or 60s, then apply a reverse voltage to the annular electrolytic plate 260, scan from negative to positive, re-oxidize the metal in the amalgam into ions and return to the solution, generate oxidation current, and then record the voltage and current curves by an external computer to perform data detection on the heavy metal content in the sample in the tempered glass tube 210.

[0059] The working principle provided by the present invention is as follows: waste oil is precipitated, after a period of time, 50g of floating oil sample is taken from the upper layer, distilled water is added to dilute it, 0.05mol / L of sodium hydroxide solution is added, the pH value of the mixed solution is adjusted to 7.8-8, then appropriate amounts of sodium periodate and ethylene glycol solution are added to perform static reaction in a dark place, and finally appropriate amounts of sodium formate solution and phenol solution indicator are added, titration detection is performed through a two-liquid titration component 100, and the amount of sodium hydroxide used to change the color of the phenol solution indicator is recorded, and then a comparative experiment is performed, according to the formula X=(9.21*0.125*(V1-V 2) / m%), where X is the purity of glycerol in the oil spill sample, V1 is the amount of sodium hydroxide used to change the color of the phenol solution indicator, and V2 is the amount of sodium hydroxide used in the control experiment. The principle equation of the reaction is: CH2OH-CH2OH-CH2OH+2NaIO-----HCOOH+2HCHO+H2O, HCOOH+NaOH-----H2O+NaCOOH, where the ratio of ethylene glycol solution is: 1 volume of ethylene glycol added to 1 volume of distilled water (the distilled water was boiled for more than 10 minutes before the experiment to remove CO2).

[0060] When testing the heavy metal content in the sample, a high-resistance alternating current of 220 volts and 1 megohm is introduced to the annular electrolytic plate 260, and mercury droplets are dripped into the sample using the double-liquid titration assembly 100, so that the heavy metal ions are electrolytically deposited and enriched on the annular electrolytic plate 260 to form amalgam. Thereafter, a reverse voltage is applied to the annular electrolytic plate 260, and scanning from negative to positive generates an oxidation current. The voltage and current curves are recorded by an external computer, and data detection of the heavy metal content in the sample in the tempered glass tube 210 is performed.

[0061] The detection method provided by the present invention comprises the following steps: S1: the waste oil is subjected to sedimentation treatment. After a period of time, 50 g of the floating oil sample on the upper layer is taken and placed inside the bottom kettle body 200 through the liquid inlet pipe 220. Thereafter, distilled water is added to the bottom kettle body 200 to a volume of 2.5 L through the liquid inlet pipe 220. The motor 250 is driven to drive the stirring rod 240 to mix and stir the floating oil sample at the bottom of the bottom kettle body 200. Thereafter, 0.05 mol / L of sodium hydroxide solution is added to the stirring liquid through the liquid inlet pipe 220 to adjust the pH value of the mixed liquid to 7.8-8.

[0062] S2: After that, 50 mL of sodium periodate solution is accurately added to the mixed solution through the liquid inlet pipe 220, and the device is placed in a dark place for 30 minutes. After that, 10 mL of 50% ethylene glycol solution is added to the mixed solution, and the mixed solution is placed in a dark place for 20 minutes.

[0063] S3: After the standing is completed, 5 ml of 1 mol / L sodium formate solution is added to the mixed solution through the liquid inlet pipe 220, and a few drops of phenol solution indicator are added, and then 0.125 mol / L sodium hydroxide solution is added to the liquid storage area 112 through the liquid adding tank 114. At this time, the solution in the liquid storage area 112 enters the interior of the sealing cylinder 131 through the liquid inlet 113 and the conducting port 132. At this time, the vibrating needle 160 is vibrated by the triggering component 170, and the liquid in the liquid discharge bucket 116 enters the burette 117 by controlling the vibration of the vibrating needle 160. The liquid in the burette 117 is dripped into the bottom kettle body 200 by the vibration of the vibrating needle 160. The pH value of the mixed solution is judged by observing the color change of the mixed solution. When the solution changes color completely, the titration end point is reached, and the pH value is 7.7~8.1. At this time, the amount of sodium hydroxide used is recorded as V1, and the mass of the added floating oil sample is m;

[0064] S4: Use 50ml of water instead of the sample to do a blank experiment. Before adding sodium periodate, adjust the pH to 6.5 by titration. After that, the pH at the titration endpoint is 6.5. Record the amount of sodium hydroxide used at this time as V2. According to the formula X=9.21*0.125*(V1-V2) / m%, the purity of glycerol in the oil slick sample can be obtained;

[0065] S5: After the purity test of glycerol in the oil floating sample is completed, washing water is added to the liquid adding tank 114, and the solenoid valve 115 is opened at the same time, so as to wash the sodium hydroxide solution in the liquid storage area 112 and the double kettle body 110. After the washing is completed, liquid water is injected into the bottom kettle body 200 through the liquid inlet pipe 220, and the excess washing water in the liquid discharge hopper 116 is discharged through the trigger component 170, so that the water level in the bottom kettle body 200 just overflows the annular electrolytic plate 260;

[0066] S6: 220V AC is sent to the annular electrolytic plate 260 through a high resistance of 1 megohm, and at the same time, the trigger component 170 is driven to drive the vibrating needle 160 to vibrate to control the dripping of mercury drops. Mercury drops from the lower end of the burette 117 into the tempered glass cylinder 210. Under the action of gravity, the diameter of the mercury drops dripping from the bottom of the burette 117 is 1mm. The mercury drops dripping due to gravity electrolyze and deposit heavy metal ions under a constant potential, enrich them on the annular electrolytic plate 260 and form amalgam;

[0067] S7: Drive the stirring rod 240 to stir the mixed liquid at a constant stirring speed, increase the pre-electrolysis time for a given metal ion, that is, after the enrichment is completed, stand still for 30s or 60s, then apply a reverse voltage to the annular electrolytic plate 260, scan from negative to positive, re-oxidize the metal in the amalgam into ions and return to the solution, generate oxidation current, and then record the voltage and current curves by an external computer, and perform data detection on the heavy metal content in the sample in the tempered glass tube 210.

[0068] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for quickly detecting the effective component content of waste oil and fat, comprising a double-liquid titration component (100) and a bottom kettle body (200), characterized in that: A tempered glass cylinder (210) is installed on the top of the bottom kettle body (200), the bottom of the double-liquid titration assembly (100) is located inside the tempered glass cylinder (210), and an annular electrolytic plate (260) is arranged inside the tempered glass cylinder (210); The double-liquid titration assembly (100) comprises a double kettle (110), and the double kettle (110) is composed of an outer kettle and an inner kettle. The inner kettle of the double kettle (110) is provided with an inner thread groove (111). The inner kettle of the double kettle (110) is connected with a double adjustment mechanism (130). A liquid storage area (112) is provided between the outer kettle inner wall and the inner kettle outer wall of the double kettle (110). The bottom of the inner kettle body in (110) is provided with a liquid inlet (113), and the liquid inlet (113) is provided with a plurality of groups and is evenly distributed on the inner kettle body. The liquid storage area (112) is connected with the interior of the inner kettle body in the double kettle body (110) through the plurality of groups of liquid inlets (113). A feeding kettle (120) is sealed and fixedly installed on the top of the double kettle body (110), and the center line of the feeding kettle (120) coincides with the center line of the double kettle body (110); The double adjustment mechanism (130) comprises a sealing cylinder (131), the top outer wall of the sealing cylinder (131) is sealedly sleeved with an outer sleeve (134), the bottom outer wall of the outer sleeve (134) is provided with an external thread (135), the external thread (135) is meshed with the internal thread groove (111), and the outer sleeve (134) is rotatably connected to the inner kettle body in the double kettle body (110), an outer copper ring (136) is provided at the center of the top of the sealing cylinder (131), and both sides of the top of the outer copper ring (136) are provided with insertion holes (137), two groups of the insertion holes (137) both penetrate the sealing cylinder (131) and the outer sleeve (134), and the two groups of the insertion holes (137) are both inserted with plug posts (138), and the outer sleeve (134), the sealing cylinder (131) and the outer copper ring (136) are fixedly connected through the plug posts (138); The outer wall of the bottom of the sealing cylinder (131) is provided with a plurality of groups of conducting ports (132), and the plurality of groups of conducting ports (132) are movably connected to the liquid inlet (113); the outer wall of the bottom of the sealing cylinder (131) is in sealing and movably contacting with the inner wall of the bottom of the inner kettle body in the double kettle body (110); a limiting ring (133) is fixedly mounted on the outer wall of the middle part of the sealing cylinder (131), and the bottom of the limiting ring (133) is in movably contacting with the inner wall of the middle part of the inner kettle body in the double kettle body (110); A support ring (140) is sealed and fixedly connected to the inner wall of the top of the double kettle body (110); an inner copper ring (141) is fixedly installed at the bottom of the support ring (140); the inner copper ring (141) coincides with the center line of the support ring (140), and the inner copper ring (141) is located inside the outer copper ring (136); the outer wall of the inner copper ring (141) is in sealed and movable contact with the inner wall of the outer copper ring (136); an inner liquid drainage groove (142) is provided on the side wall of the inner copper ring (141); an outer liquid drainage groove (139) is provided on the side wall of the outer copper ring (136); and the inner liquid drainage groove (142) and the outer liquid drainage groove (139) are movably matched; A positioning tube (144) is fixedly installed at the center of the bottom of the inner copper ring (141), and the positioning tube (144) is sealed and penetrates the bottom of the inner copper ring (141). A liquid inlet ring (143) is provided between the inner wall of the support ring (140) and the positioning tube (144), and the liquid inlet ring (143) is communicated with the inside of the inner copper ring (141). The inside of the feeding kettle (120) is filled with liquid mercury, and the top position of the liquid mercury is smaller than the top surface of the positioning tube (144); The inner wall of the positioning tube (144) is movably connected to a rotating tube (150), the outer wall of the bottom of the rotating tube (150) is fixedly installed with a cross (152), the outer wall of the cross (152) is fixedly connected to the inner wall of the bottom of the sealing tube (131), and the sealing tube (131) is fixedly connected to the rotating tube (150) through the cross (152), the top side wall of the rotating tube (150) is fixedly installed with a rotating handle (151), and the inner wall of the rotating tube (150) is movably connected to a vibrating needle (160); A liquid discharge hopper (116) is fixedly and sealedly mounted on the bottom of the inner kettle body in the double kettle body (110), a burette (117) is fixedly and sealedly mounted on the bottom of the liquid discharge hopper (116), the vibrating needle (160) is located in the liquid discharge hopper (116) and the burette (117), and coincides with the center line of the burette (117), the vibrating needle (160) is in active contact with the inner wall of the burette (117), a liquid adding tank (114) is fixedly mounted on the side wall of the double kettle body (110), and the liquid adding tank (114) is in communication with the inside of the liquid storage area (112), a solenoid valve (115) is fixedly mounted on the bottom of the double kettle body (110), and an input end of the solenoid valve (115) is in communication with the inside of the liquid storage area (112), and a top support plate (118) is fixedly mounted on the top of the feeding kettle (120), and a trigger component (170) is provided on the top support plate (118).

2. A rapid detection device for the effective component content of waste oil and fat according to claim 1, characterized in that: The trigger component (170) comprises a cross-shaped rotating head (171), the bottom of the cross-shaped rotating head (171) is fixedly connected to the top of the vibrating needle (160), the top four sides of the top support plate (118) are fixedly installed with support plates (172), the inner walls of the four groups of support plates (172) are rotatably connected to the receiving rotating cylinder (173), the four side walls of the cross-shaped rotating head (171) are rotatably connected to the rotating rod (174), the rotating rod (174) is located inside the corresponding receiving rotating cylinder (173), and the end wall of the rotating rod (174) is fixedly installed with a sliding plug (175), and the sliding plug (175) is slidably connected to the inner wall of the receiving rotating cylinder (173), a spring (176) is sleeved on the rotating rod (174) located inside the receiving rotating cylinder (173), one end of the spring (176) is fixedly connected to the corresponding side wall of the sliding plug (175), and the other end of the spring (176) is fixedly connected to the inner end wall of the receiving rotating cylinder (173), and the same cylinder (180) is fixedly installed on the top of the four groups of support plates (172), and the output end of the cylinder (180) is in active contact with the top of the cross rotating head (171).

3. A rapid detection device for the effective component content of waste oil and fat according to claim 2, characterized in that: The tempered glass cylinder (210) is fixedly connected to the top of the bottom kettle body (200) and is internally communicated. The annular electrolytic plate (260) is fixedly connected to the inner wall of the tempered glass cylinder (210). The outer wall of the bottom of the double kettle body (110) seals and penetrates the top of the tempered glass cylinder (210) and is fixedly connected to the tempered glass cylinder (210). A liquid inlet pipe (220) and a liquid outlet pipe (230) are fixedly installed on the outer wall of the bottom kettle body (200). A stirring rod (240) is rotatably connected to the inner wall of the bottom of the bottom kettle body (200). A motor (250) is fixedly installed on the bottom of the bottom kettle body (200), and the output end of the motor (250) is fixedly connected to the stirring rod (240).

4. The detection method of a rapid detection device for the effective component content of waste grease according to claim 3 is characterized in that: The specific steps are as follows: S1: The waste oil is precipitated. After a period of time, about 50 g of the floating oil sample on the upper layer is taken and placed inside the bottom kettle body (200) through the liquid inlet pipe (220). Thereafter, distilled water is added to the bottom kettle body (200) to about 2.5 L through the liquid inlet pipe (220). The motor (250) is driven to drive the stirring rod (240) to mix and stir the floating oil sample at the bottom of the bottom kettle body (200). Thereafter, 0.05 mol / L of sodium hydroxide solution is added to the stirring liquid through the liquid inlet pipe (220) to adjust the pH value of the mixed liquid to 7.8-8. S2: Thereafter, 50 mL of NaIO4 solution was accurately added to the mixture through the inlet tube (220), and the device was placed in a dark place for 30 min, after which 10 ml of 50% ethylene glycol solution was added to the mixture and allowed to stand in a dark place for 20 min; S3: After the standing is completed, 5 ml of 1 mol / L sodium formate solution is added to the mixed solution through the liquid inlet pipe (220), and a few drops of phenol solution indicator are added. Then, 0.125 mol / L sodium hydroxide solution is added to the liquid storage area (112) through the liquid adding tank (114). At this time, the solution in the liquid storage area (112) enters the sealing cylinder (131) through the liquid inlet (113) and the conducting port (132). At this time, the vibrating needle (16) can be activated by the triggering member (170). 0) is vibrated, and the liquid in the liquid discharge bucket (116) is made to enter the burette (117) by controlling the vibration of the vibrating needle (160). The liquid in the burette (117) is made to drip into the bottom kettle body (200) by the vibration of the vibrating needle (160). The Ph value of the mixed liquid is determined by observing the change in color of the mixed liquid. When the solution completely changes color, the titration end point is reached, and the pH value is 7.7-8.

1. At this time, the amount of sodium hydroxide used is recorded as V1, and the mass of the added floating oil sample is m; S4: Use 50 ml of water to replace the sample for a blank test, and adjust the pH to 6.5 by titration before adding sodium periodate. After that, the titration endpoint pH is 6.5, and the amount of sodium hydroxide used at this time is recorded as V2. According to the formula X=(9.21*0.125*(V1-V2) / m%), the purity of glycerol in the oil slick sample can be obtained; S5: After the purity of glycerol in the oil floating sample is detected, washing water is added to the liquid adding tank (114), and the solenoid valve (115) is opened at the same time, so as to clean the sodium hydroxide solution in the liquid storage area (112) and the double kettle body (110). After the cleaning is completed, liquid water is injected into the bottom kettle body (200) through the liquid inlet pipe (220), and the excess washing water in the liquid discharge hopper (116) is discharged through the trigger component (170), so that the water level in the bottom kettle body (200) just overflows the annular electrolytic plate (260); S6: 220 volts of alternating current is sent to the annular electrolytic plate (260) through a high resistance of 1 megohm, and at the same time, the trigger member (170) is driven to drive the vibrating needle (160) to vibrate to control the dripping of mercury drops. Mercury drops from the lower end of the burette (117) fall into the tempered glass cylinder (210). Under the action of gravity, the diameter of the mercury drops dripping from the bottom of the burette (117) is about 1 mm. The mercury drops dripping due to gravity electrolyze and deposit heavy metal ions at a constant potential, and are enriched on the annular electrolytic plate (260) to form amalgam; S7: driving the stirring rod (240) to stir the mixed liquid at a constant stirring speed, increasing the pre-electrolysis time for a given metal ion, that is, after the enrichment is completed, after standing for 30 seconds or 60 seconds, a reverse voltage is applied to the annular electrolytic plate (260), scanning from negative to positive, and the metal in the amalgam is re-oxidized into ions and returned to the solution, generating an oxidation current. Thereafter, the voltage and current curves are recorded by an external computer, and data detection is performed on the heavy metal content in the sample in the tempered glass cylinder (210).

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