CN111606455A

CN111606455A - A inorganic waste liquid stage treatment device for laboratory

Info

Publication number: CN111606455A
Application number: CN202010516375.9A
Authority: CN
Inventors: 王大祥; 袁博; 周青; 梁祥玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2020-09-01

Abstract

The invention relates to the technical field of wastewater treatment, and discloses an inorganic waste liquid grading treatment device for a laboratory, which comprises an outer box body, wherein an ozone machine is installed on one side of the top end of the outer box body, a first water pump is installed on the other side of the top end of the outer box body, an air compressor is connected to the rear side of one end of the outer box body, and an air bottle is connected to the other side of the outer box body. According to the invention, the primary treatment mechanism is used for carrying out primary treatment on the acidic and alkaline waste liquid in the laboratory, the secondary water pump is used for pumping the waste liquid subjected to primary treatment in the primary reaction box into the neutralization treatment mechanism for neutralization reaction, the pH value in the waste liquid is further reduced, the waste liquid subjected to neutralization reaction flows into the secondary treatment mechanism for treatment of heavy metal chromium ions, the liquid in the secondary reaction box is stirred by compressed air, the liquid can be precipitated by the partition plate, and the phenomenon that a large amount of precipitate enters the filter to cause filter blockage is avoided, so that pollution-free liquid can be discharged.

Description

A inorganic waste liquid stage treatment device for laboratory

Technical Field

The invention relates to the technical field of wastewater treatment, in particular to an inorganic waste liquid grading treatment device for a laboratory.

Background

The waste water generated in a laboratory contains all the ingredients including common inorganic substances, heavy metal ions, harmful microorganisms and the like, relatively rare bacteria, toxins, various pesticide residues, drug residues and the like, once the inorganic waste water with overproof heavy metals is discharged to a clean downstream, a large water source is polluted, wherein the color, the smell and the like of the water polluted by the chromium ions are not different from those of normal water, once the water source is used for irrigation, soil and crops are inevitably taken as heavy metal pollution objects, and people eat the crops planted on the soil polluted by the chromium ions, are easily poisoned by the chromium ions, and can discharge the waste water after the waste water is treated.

Chinese patent discloses a waste liquid equipment (grant notice No. CN210313671U) that is used for laboratory waste liquid to handle usefulness, heavy metal waste liquid in this patent technology will laboratory waste water, acid-base waste liquid and other waste liquids let in three reaction intracavity by the feed liquor pipe, independently switch on intercommunication device again, make the chemical agent on the outside medicament holding vessel can get into three reaction intracavity with different content, thereby make heavy metal waste liquid, acid-base waste liquid and other waste liquids can carry out independent synchronous processing, realize the promotion of treatment effeciency, but these waste liquid are handled the back, often can not reach the standard of direct emission, probably cause the pollution of environment, and treatment effeciency is not high. Accordingly, those skilled in the art have provided an inorganic waste liquid classification treatment apparatus for laboratories to solve the problems set forth in the background art described above.

Disclosure of Invention

The invention aims to provide an inorganic waste liquid grading treatment device for a laboratory, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

an inorganic waste liquid grading treatment device for a laboratory comprises an outer box body, wherein an ozone machine is installed on one side of the top end of the outer box body, a first water pump is installed on the other side of the top end of the outer box body, an air compressor is connected to the rear side of one end of the outer box body, a gas cylinder is connected to the other side of the outer box body, an output end of the first water pump is fixedly connected with a water pump liquid outlet main pipe, an input end of the first water pump is fixedly connected with a water pump liquid inlet main pipe, the bottom end of the water pump liquid inlet main pipe is sequentially connected with a fourth medicament barrel, a third medicament barrel, a second medicament barrel and a first medicament barrel from left to right through pipelines respectively, a primary treatment mechanism is arranged on one side of the inner part of the outer box body, a neutralization treatment mechanism is arranged on one side of the inner side of the primary treatment mechanism, a secondary treatment mechanism, the neutralization treatment mechanism comprises an alkaline reaction cylinder and an acidic reaction cylinder located on one side of the alkaline reaction cylinder, one side of the bottom ends of the alkaline reaction cylinder and the acidic reaction cylinder is jointly connected with a second air inlet pipe, the other side of the bottom ends of the alkaline reaction cylinder and the acidic reaction cylinder is jointly connected with a waste liquid inlet pipe, the top ends of the alkaline reaction cylinder and the acidic reaction cylinder are jointly connected with an acid-alkali liquid adding pipe, the outer sides of the alkaline reaction cylinder and the acidic reaction cylinder are close to the lower end of the acid-alkali liquid adding pipe and are jointly connected with a waste liquid discharge pipe, and the top end of the acid-alkali liquid adding pipe is fixedly connected with a water pump liquid outlet main.

As a further scheme of the invention: the one-level processing mechanism includes the one-level reaction case, the motor is installed on the top of one-level reaction case, and the bottom fixedly connected with scum pipe of one-level reaction case, the one end of one-level reaction case is run through and is provided with the medicament second and adds the pipe, and the other end of one-level reaction case runs through and is provided with water pump feed liquor pipe, one side that the top of one-level reaction case is close to the motor is provided with drags for the cinder notch, the outside fixedly connected with second water pump that the upper end of water pump feed liquor pipe is located the one-level reaction case, the output fixedly connected with flowmeter of second water pump, one side that scum pipe was kept away from to the inside of one-level reaction case is installed the.

As a still further scheme of the invention: the stirring shaft is positioned in the middle of the inside of the first-stage reaction box, and the bottom end of the water pump liquid inlet pipe is positioned in the filter screen cover.

As a still further scheme of the invention: one end of the flow meter is fixedly connected with the waste liquid inlet pipe, and one end of the second medicament adding pipe is fixedly connected with the water pump liquid outlet main pipe.

As a still further scheme of the invention: second grade processing agency includes the second grade reaction box, one side fixedly connected with ozone pipe on the top of second grade reaction box, and the opposite side embedding on the top of second grade reaction box is provided with the waste liquid connecting pipe, the upside embedding of the one end of second grade reaction box is provided with the first joining pipe of medicament, and the lower extreme of the inside wall of second grade reaction box installs the PH meter, the first air admission pipe of one side fixedly connected with of the first joining pipe of medicament is kept away from to the lower extreme of second grade reaction box, and a set of division board of the inside fixedly connected with of second grade reaction box, the bottom fixedly connected with tee bend blow off pipe of second grade reaction box.

As a still further scheme of the invention: the bottom of tee bend blow off pipe is connected with the blowdown house steward, and one side of tee bend blow off pipe is connected with the filter, the one end fixedly connected with outlet pipe of filter, and the one end of filter is close to the downside fixedly connected with backwash pipe of outlet pipe, the internally mounted of filter has the filter core.

As a still further scheme of the invention: the height of the partition plate sequentially increases from left to right, one end of the first medicament adding pipe is fixedly connected with the waste liquid connecting pipe, and the other end of the first medicament adding pipe is fixedly connected with the water pump liquid outlet main pipe.

As a still further scheme of the invention: the backwashing pipe and the second air inlet pipe are both fixedly connected with an air compressor, the first air inlet pipe is also fixedly connected with the second air inlet pipe, and the air bottle is also fixedly connected with the first air inlet pipe and the second air inlet pipe.

Compared with the prior art, the invention has the beneficial effects that:

carry out the preliminary treatment through the pH waste liquid of primary treatment mechanism to the laboratory, and the (mixing) shaft of primary treatment mechanism can stir the waste liquid, promote the reaction, can carry out neutralization reaction in the waste liquid suction of preliminary treatment in the one-level reaction box and the processing mechanism through the second water pump, further reduce the pH valve in the waste liquid, waste liquid after the neutralization reaction flows into the processing that secondary treatment mechanism got into heavy metal chromium ion, stir the liquid in the secondary reaction box through compressed air, can deposit liquid through the division board, avoid a large amount of sediments to enter into the filter, cause the filter jam, thereby can discharge pollution-free liquid, and the treatment effeciency is high.

Drawings

FIG. 1 is a schematic structural diagram of an inorganic waste liquid grading treatment device used in a laboratory;

FIG. 2 is a schematic sectional view of an outer case of an inorganic waste liquid classification treatment apparatus used in a laboratory;

FIG. 3 is a schematic sectional view of a neutralization treatment means in an inorganic waste liquid classification treatment apparatus used in a laboratory;

FIG. 4 is a schematic sectional view of a primary treatment means in an inorganic waste liquid classification treatment apparatus for a laboratory;

FIG. 5 is a schematic sectional view of a secondary treatment mechanism in an inorganic waste liquid classification treatment apparatus for a laboratory.

In the figure: 1. an outer case; 2. an ozone machine; 3. a first water pump; 4. a water pump liquid inlet main pipe; 5. a gas cylinder; 6. a first medicament cartridge; 7. a second medicament cartridge; 8. a third medicament cartridge; 9. a fourth medicament cartridge; 10. an air compressor; 11. a secondary treatment mechanism; 111. a secondary reaction box; 112. a partition plate; 113. a waste liquid connecting pipe; 114. an ozone tube; 115. a first drug addition tube; 116. a pH meter; 117. a filter; 118. a water outlet pipe; 119. a backwash pipe; 110. a main sewer; 1111. a three-way blow-off pipe; 1112. a first air inlet duct; 12. a neutralization processing mechanism; 121. an alkaline reaction cylinder; 122. an acidic reaction cylinder; 123. an acid and alkali solution adding pipe; 125. a second air inlet duct; 126. a waste liquid inlet pipe; 127. a waste liquid discharge pipe; 13. a primary treatment mechanism; 131. a first-stage reaction box; 132. a second drug addition tube; 133. a motor; 134. fishing a slag hole; 135. a second water pump; 136. a flow meter; 137. a liquid inlet pipe of a water pump; 138. a filter screen cover; 139. a stirring shaft; 130. a slag discharge pipe; 14. a water pump liquid outlet main pipe.

Detailed Description

Referring to fig. 1 to 5, in the embodiment of the invention, an inorganic waste liquid grading treatment device for a laboratory comprises an outer box 1, an ozone machine 2 is installed on one side of the top end of the outer box 1, a first water pump 3 is installed on the other side of the top end of the outer box 1, an air compressor 10 is connected to the rear side of one end of the outer box 1, a gas cylinder 5 is connected to the other side of the outer box 1, carbon dioxide gas is contained in the gas cylinder 5, a water pump liquid outlet main pipe 14 is fixedly connected to the output end of the first water pump 3, a water pump liquid inlet main pipe 4 is fixedly connected to the input end of the first water pump 3, the bottom end of the water pump liquid inlet main pipe 4 is sequentially connected with a fourth medicament barrel 9, a third medicament barrel 8, a second medicament barrel 7 and a first medicament barrel 6 from left to right through pipelines, the acidic solution contained in the fourth medicament barrel 9, the third medicament barrel 8, the second medicament barrel, The device comprises an alkaline solution, a sodium sulfide solution and a polyferric sulfate solution, wherein a primary treatment mechanism 13 is arranged on one side of the inside of an outer box body 1, a neutralization treatment mechanism 12 is arranged on one side, which is positioned on the primary treatment mechanism 13, of the inside of the outer box body 1, a secondary treatment mechanism 11 is arranged on one side, which is positioned on the neutralization treatment mechanism 12, of the inside of the outer box body 1, the neutralization treatment mechanism 12 comprises an alkaline reaction cylinder 121 and an acidic reaction cylinder 122 positioned on one side of the alkaline reaction cylinder 121, limestone or dolomite is contained in the alkaline reaction cylinder 121, quartz is contained in the acidic reaction cylinder 122, a second air inlet pipe 125 is connected with one side of the bottom ends of the alkaline reaction cylinder 121 and the acidic reaction cylinder 122 together, a waste liquid inlet pipe 126 is connected with the other side of the bottom ends of the alkaline reaction cylinder 121 and the acidic reaction cylinder 122 together, and an acid-base, the outer sides of the alkaline reaction cylinder 121 and the acidic reaction cylinder 122 near the lower end of the acid-alkali liquid feeding pipe 123 are connected with a waste liquid discharge pipe 127, and the top end of the acid-alkali liquid feeding pipe 123 is fixedly connected with the water pump liquid outlet main pipe 14.

In fig. 4: one-level processing mechanism 13 includes one-level reaction box 131, motor 133 is installed on the top of one-level reaction box 131, the bottom fixedly connected with scum pipe 130 of one-level reaction box 131, the one end of one-level reaction box 131 is run through and is provided with medicament second joining pipe 132, the other end of one-level reaction box 131 runs through and is provided with water pump feed liquor pipe 137, one side that the top of one-level reaction box 131 is close to motor 133 is provided with drags for sediment mouth 134, the outside fixedly connected with second water pump 135 that the upper end of water pump feed liquor pipe 137 is located one-level reaction box 131, the output fixedly connected with flowmeter 136 of second water pump 135, slag pipe 130 is kept away from to one side in the inside of one-level reaction box 131 and filter screen cover 138 is installed, motor 133's output fixedly connected with (mixing) shaft 139, waste liquid.

In fig. 4: the stirring shaft 139 is located in the middle of the inside of the first-stage reaction tank 131, the bottom end of the water pump liquid inlet pipe 137 is located inside the filter screen cover 138, and the solid impurities in the waste liquid can be prevented from being pumped out through the filter screen cover 138.

In fig. 3 and 4: one end of the flow meter 136 is fixedly connected to the waste liquid inlet pipe 126, the pumping speed of the second water pump 135 can be detected by the flow meter 136, and one end of the second chemical adding pipe 132 is fixedly connected to the water pumping main pipe 14, so that the acidic solution or the alkaline solution in the fourth chemical tank 9 and the third chemical tank 8 can be pumped into the first-stage reaction tank 131.

In fig. 5: secondary processing mechanism 11 includes second grade reaction box 111, one side fixedly connected with ozone pipe 114 on the top of second grade reaction box 111, the opposite side embedding on the top of second grade reaction box 111 is provided with waste liquid connecting pipe 113, the upside embedding of the one end of second grade reaction box 111 is provided with the first pipe 115 of adding of medicament, PH meter 116 is installed to the lower extreme of the inside wall of second grade reaction box 111, the first air admission pipe 1112 of one side fixedly connected with of the first pipe 115 of adding of medicament is kept away from to the lower extreme of second grade reaction box 111, a set of division board 112 of inside fixedly connected with of second grade reaction box 111, the bottom fixedly connected with tee bend blow off pipe 1111 of second grade reaction box 111, can handle the waste liquid after carrying on and handling through secondary processing mechanism 11, make waste water reach emission standard.

In fig. 5: the bottom of three-way blow off pipe 1111 is connected with blowdown house steward 110, and one side of three-way blow off pipe 1111 is connected with filter 117, and the one end fixedly connected with outlet pipe 118 of filter 117, the downside fixedly connected with backwash pipe 119 of outlet pipe 118 is close to the one end of filter 117, and the internally mounted of filter 117 has the filter core, can carry out further filtration to the water that discharges through filter 117.

In fig. 1 and 5: the height of the partition plate 112 becomes higher from left to right in sequence, so that the liquid after reaction can be precipitated, a large amount of solid is prevented from entering the filter 117, one end of the first medicament adding pipe 115 is fixedly connected with the waste liquid connecting pipe 113, the other end of the first medicament adding pipe 115 is fixedly connected with the water pump liquid outlet main pipe 14, and therefore the sodium sulfide solution and the polymeric ferric sulfate solution in the second medicament barrel 7 and the first medicament barrel 6 can enter the secondary treatment mechanism 11.

In fig. 2, 3 and 5: the backwash pipe 119 and the second air inlet pipe 125 are both fixedly connected with the air compressor 10, compressed air generated by the air compressor 10 enters the filter 117 from the backwash pipe, the filter element in the filter 117 can be frequently backwashed, the filter element blockage is avoided, the first air inlet pipe 1112 is also fixedly connected with the second air inlet pipe 125, therefore, compressed air generated by the air compressor 10 can enter the secondary reaction box 111, the alkaline reaction cylinder 121 or the acidic reaction cylinder 122, and the air bottle 5 is also fixedly connected with the first air inlet pipe 1112 and the second air inlet pipe 125.

The working principle of the invention is as follows: waste liquid generated in a laboratory enters the primary reaction box 131 through the slag scooping port 134 of the primary treatment mechanism 13, when the waste liquid is acidic, a pipeline connected with the third chemical agent barrel 8 is opened (when the waste liquid is alkaline, a pipeline connected with the fourth chemical agent barrel 9 is opened), then, the first water pump 3 is started, the first water pump 3 pumps out alkaline solution in the third chemical agent barrel 8 through the water pump liquid inlet header pipe 4, the alkaline solution is put into the primary reaction box 131 through the water pump liquid outlet header pipe 14 and the chemical agent second adding pipe 132, then, the motor 133 is started, the motor 133 drives the stirring shaft 139 to rotate to stir the waste liquid, so that the waste liquid and the alkaline solution fully react, after a period of reaction, the waste liquid inlet pipe 126 connected with the alkaline reaction barrel 121 is opened (when the waste liquid is alkaline, the waste liquid inlet pipe 126 connected with the acidic reaction barrel 122 is opened), the second water pump 135 is started, the second water pump 135 pumps the reacted waste liquid in the first-stage reaction tank 131 through the water pump liquid inlet pipe 137, the waste liquid sequentially passes through the flow meter 136 and the waste liquid inlet pipe 126 and then enters the alkaline reaction cylinder 121 (when the waste liquid becomes alkaline, the waste liquid sequentially passes through the flow meter 136 and the waste liquid inlet pipe 126 and then enters the acidic reaction cylinder 122), the waste liquid and limestone or dolomite in the alkaline reaction cylinder 121 perform a neutralization reaction, the acidity in the waste liquid is reduced again, when the acidity of the waste liquid is high and the limestone or dolomite is not enough to satisfy the neutralization reaction, the acid-base liquid inlet pipe 123 connected with the alkaline reaction cylinder 121 is opened (when the waste liquid becomes alkaline, the acid-base liquid inlet pipe 123 connected with the acidic reaction cylinder 122 is opened), the alkaline solution in the third reagent barrel 8 can be pumped into the acid-base liquid inlet pipe 123 through the first water pump 3, and the alkaline solution enters the alkaline reaction cylinder 121 from the acid-base liquid inlet pipe 123, thereby meeting the requirement of neutralization reaction, when the acid concentration of the wastewater is larger, a large amount of CO2 generated after neutralization is dissolved in the wastewater, so that the pH value of the effluent is lower, the second air inlet pipe 125 connected with the alkaline reaction cylinder 121 is opened (when the waste liquid becomes alkaline, the second air inlet pipe 125 connected with the acid reaction cylinder 122 is opened), compressed air is generated by the air compressor 10, the compressed air enters the alkaline reaction cylinder 121 from the second air inlet pipe 125, so that the dissolved CO2 and other volatile solutes in the wastewater pass through the gas-liquid interface and diffuse to the gas phase, thereby facilitating the subsequent treatment, the liquid after the reaction of the alkaline reaction cylinder 121 flows into the waste liquid connecting pipe 113 from the waste liquid discharge pipe 127, and then enters the secondary reaction tank 111 from the waste liquid connecting pipe 113, at this time, the waste liquid is located at one side of the partition plate 112, and then, the pipeline connected with the second chemical agent barrel 7 is opened, the sodium sulfide solution in the second medicament barrel 7 is pumped into the first medicament adding pipe 115 through the first water pump 3, the sodium sulfide solution in the first medicament adding pipe 115 flows into the second-stage reaction box 111 through the waste liquid connecting pipe 113, at this time, the compressed air generated by the air compressor 10 enters the second-stage reaction box 111 through the first air inlet pipe 1112 to stir the liquid in the second-stage reaction box 111, the pH value of the waste liquid is detected through the pH meter 116, if the pH value is high, the carbon dioxide gas in the gas cylinder 5 can enter the waste liquid through the first air inlet pipe 1112 to adjust the pH value of the waste liquid, so that the pH value is kept at a proper value, the sodium sulfide reacts with the chromium ions in the waste liquid to separate insoluble cadmium sulfide, then the polymeric ferric sulfate solution in the first medicament barrel 6 is pumped out through the first water pump 3, and the polymeric ferric sulfate solution flows into the second-stage reaction box 111 through the first medicament adding pipe 115 and the waste liquid connecting pipe 113, ferric sulfide and ferric hydroxide precipitates are generated by polyferric sulfate solution, under the coagulation and coprecipitation effects, sulfide ions are removed while cadmium sulfide precipitates are strengthened, ozone gas is generated through an ozone machine 2, the ozone gas enters a secondary reaction box 111 from an ozone pipe 114 to disinfect the secondary reaction box 111, the secondary reaction box 111 reacts, a three-way drain pipe 1111 at the leftmost end is opened, liquid is discharged into a filter 117 from the three-way drain pipe 1111 at the leftmost end and is filtered by the filter 117, water reaching the discharge standard is discharged from a water outlet pipe 118, after wastewater treatment is finished, a slag discharge pipe 130 is opened to discharge solid impurities precipitated in a primary reaction box 131, two ends of the filter 117 are closed, the three-way drain pipe 1111 and a drain header pipe 110 are opened to discharge impurities in the secondary reaction box 111, compressed air generated by an air compressor 10 enters the filter 117 from a backwashing pipe, the filter cartridge in the filter 117 can be frequently backwashed to avoid clogging of the filter cartridge.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.

Claims

1. The inorganic waste liquid grading treatment device for the laboratory comprises an outer box body (1) and is characterized in that an ozone machine (2) is installed on one side of the top end of the outer box body (1), a first water pump (3) is installed on the other side of the top end of the outer box body (1), an air compressor (10) is connected to the rear side of one end of the outer box body (1), a gas cylinder (5) is connected to the other side of the outer box body (1), a water pump liquid outlet header pipe (14) is fixedly connected to the output end of the first water pump (3), a water pump liquid inlet header pipe (4) is fixedly connected to the input end of the first water pump (3), the bottom end of the water pump liquid inlet header pipe (4) is sequentially connected with a fourth medicament barrel (9), a third medicament barrel (8), a second medicament barrel (7) and a first medicament barrel (6) from left to right through pipelines, a first-stage treatment mechanism (13) is arranged on one, and one side of the inner side of the outer box body (1) which is positioned at the primary treatment mechanism (13) is provided with a neutralization treatment mechanism (12), one side of the inner side of the outer box body (1) which is positioned at the neutralization treatment mechanism (12) is provided with a secondary treatment mechanism (11), the neutralization treatment mechanism (12) comprises an alkaline reaction cylinder (121) and an acidic reaction cylinder (122) which is positioned at one side of the alkaline reaction cylinder (121), one sides of the bottom ends of the alkaline reaction cylinder (121) and the acidic reaction cylinder (122) are jointly connected with a second air inlet pipe (125), the other sides of the bottom ends of the alkaline reaction cylinder (121) and the acidic reaction cylinder (122) are jointly connected with a waste liquid inlet pipe (126), the top ends of the alkaline reaction cylinder (121) and the acidic reaction cylinder (122) are jointly connected with an acid-alkali liquid adding pipe (123), and the lower ends of the outer sides of the alkaline reaction cylinder (121) and the acidic reaction cylinder (122) which are close to the acid-alkali liquid adding, the top end of the acid-alkali liquid adding pipe (123) is fixedly connected with a water pump liquid outlet main pipe (14).

2. The inorganic waste liquid grading treatment device for the laboratory according to claim 1, wherein the primary treatment mechanism (13) comprises a primary reaction tank (131), a motor (133) is installed at the top end of the primary reaction tank (131), a slag discharge pipe (130) is fixedly connected to the bottom end of the primary reaction tank (131), a second medicament adding pipe (132) is arranged at one end of the primary reaction tank (131) in a penetrating manner, a water pump liquid inlet pipe (137) is arranged at the other end of the primary reaction tank (131) in a penetrating manner, a slag fishing port (134) is arranged at one side of the top end of the primary reaction tank (131) close to the motor (133), a second water pump (135) is fixedly connected to the outer side of the primary reaction tank (131) at the upper end of the water pump liquid inlet pipe (137), and a flow meter (136) is fixedly connected to the output end of the second water pump (135), one side of the interior of the first-stage reaction box (131) far away from the slag discharge pipe (130) is provided with a filter screen cover (138), and the output end of the motor (133) is fixedly connected with a stirring shaft (139).

3. The inorganic waste liquid stage treatment device for the laboratory according to claim 2, wherein the stirring shaft (139) is located at a middle position inside the primary reaction tank (131), and the bottom end of the water pump inlet pipe (137) is located inside the filter screen cover (138).

4. The inorganic waste liquid grading device for laboratory according to claim 2, characterized in that one end of said flow meter (136) is fixedly connected to the waste liquid inlet pipe (126), and one end of said second chemical agent inlet pipe (132) is fixedly connected to the water pump outlet main pipe (14).

5. The apparatus of claim 1, wherein the apparatus comprises a liquid-liquid separator, characterized in that the secondary treatment mechanism (11) comprises a secondary reaction box (111), one side of the top end of the secondary reaction box (111) is fixedly connected with an ozone pipe (114), and the other side of the top end of the secondary reaction box (111) is embedded with a waste liquid connecting pipe (113), a first medicament adding pipe (115) is embedded into the upper side of one end of the secondary reaction box (111), and the lower end of the inner side wall of the secondary reaction box (111) is provided with a PH meter (116), a first air inlet pipe (1112) is fixedly connected to one side of the lower end of the secondary reaction box (111) far away from the first medicament adding pipe (115), and the interior of the secondary reaction box (111) is fixedly connected with a group of partition plates (112), the bottom end of the secondary reaction box (111) is fixedly connected with a three-way drain pipe (1111).

6. The inorganic waste liquid grading treatment device for the laboratory according to claim 2, characterized in that a main sewer pipe (110) is connected to the bottom end of the three-way sewer pipe (1111), a filter (117) is connected to one side of the three-way sewer pipe (1111), an outlet pipe (118) is fixedly connected to one end of the filter (117), a back-flushing pipe (119) is fixedly connected to the lower side of one end of the filter (117) close to the outlet pipe (118), and a filter element is installed inside the filter (117).

7. The apparatus for inorganic waste liquid fractional treatment in laboratory according to claim 7, characterized in that, the height of said partition plate (112) becomes higher from left to right, one end of said first chemical feeding pipe (115) is fixedly connected with waste liquid connecting pipe (113), and the other end of said first chemical feeding pipe (115) is fixedly connected with water pump outlet main pipe (14).

8. The inorganic waste liquid grading treatment device for the laboratory according to claim 7, wherein the back washing pipe (119) and the second air inlet pipe (125) are both fixedly connected with the air compressor (10), the first air inlet pipe (1112) is also fixedly connected with the second air inlet pipe (125), and the gas cylinder (5) is also fixedly connected with the first air inlet pipe (1112) and the second air inlet pipe (125).