Innocent treatment device for samples in chemical analysis laboratory

Abstract

The utility model relates to a chemical analysis laboratory sample innocent treatment device which is characterized by comprising an original sample dissolver, a filter, a heating reactor, a miniature cyclone separator and a sewage tank, a sample to be analyzed is firstly dissolved in the dissolver by using a solvent and then reacts in the heating reactor, and the sewage tank is connected with the filter. After the reaction, the sample enters a filter, and instrument analysis or chemical analysis can be carried out after residues are removed; harmful and poisonous gas from an outlet of the heating reactor enters a miniature cyclone separator to be removed, and is discharged into a sewage treatment pool from a sewage tank for further innocent treatment; the harmless treatment device for the laboratory sample can ensure that harmful and toxic gas in the chemical analysis process does not pollute a laboratory, protects the body health of analysts, and is simple and convenient to operate and safe to use.

Description

Technical Field

[0001] The utility model relates to a laboratory device, in particular to a harmless treatment device for samples in a chemical analysis laboratory. Background Art

[0002] Chemical analysis laboratories are experimental sites for chemical factories, chemical professional colleges and universities, and testing institutions. Usually, operators or students need to complete a series of experimental operations such as dissolution, heating, pressurization, filtration, and separation of samples in the laboratory, and then use analytical instruments for determination, give data and write an experimental report. During these experimental operations, a lot of chemical substances must be used, such as high-concentration acids and alkalis, and harmful and toxic organic solvents such as benzene, formaldehyde, ammonia, methanol, pyridine and other volatile substances. During the dissolution and heating operations, toxic gases such as benzene, formaldehyde, ammonia, chlorine, hydrogen sulfide, carbon monoxide, sulfur dioxide, and nitrogen dioxide are often contacted. Usually, when the gas volume is small, the experimenters use a ventilation window or turn the ventilator to the maximum.

[0003] However, when there is a relatively large amount of harmful and toxic gases, even if a ventilation window is used, the harmful and toxic substances cannot be completely eliminated in the limited space of the laboratory, which will cause gas poisoning, skin corrosion, damage to the facial features, and cause conjunctivitis, keratitis, rhinitis, pharyngitis, tracheitis, etc., seriously endangering the physical health of the experimenters. Therefore, in addition to being cautious in experiments and operators learning and understanding safety knowledge before entering the laboratory to start experiments, the laboratory also needs to strengthen the exhaust facilities to ensure the safety of personnel. Summary of the Invention

[0004] The purpose of the utility model is to provide a harmless treatment device for samples in a chemical analysis laboratory, which can ensure that harmful and toxic gases during the chemical analysis process will not pollute the laboratory, protect the physical health of analysts, and is simple to operate and safe to use.

[0005] The utility model is realized as follows:

[0006] A harmless treatment device for samples in a chemical analysis laboratory. The device includes an original sample dissolver, a solvent bottle, a heating reactor, a filter, a micro-cyclone separator, and a sewage tank. The solvent bottle is connected to the original sample dissolver. The sample to be analyzed is first dissolved in the dissolver using a solvent. The outlet of the original sample dissolver leads to the heating reactor for reaction, and then enters the filter to remove residues. The experimenter takes out the test sample and puts it into a test sample bottle for determination by an analytical instrument. The harmful gas exhaust port above the heating reactor is connected to the side inlet pipe of the micro-cyclone separator. The top of the micro-cyclone separator is provided with an absorbent injection pipe, and the absorbent injection pipe at the top of the micro-cyclone separator can be connected to a pressure pump to spray down the harmful and toxic gases under a certain pressure for absorption. The bottom pipe of the micro-cyclone separator leads to the sewage tank. The sewage is discharged from the sewage tank to a sewage treatment pool for further harmless treatment.

[0007] The original sample dissolver is provided with a stirrer.

[0008] A heater is installed inside the heating reactor.

[0009] A sampling outlet pipe is provided at the lower part of the filter for analysis use.

[0010] Furthermore, a filter screen is installed inside the filter, and a slag discharge port is provided. A switch can be installed on the sampling outlet pipe.

[0011] The outlet pipe of the micro-cyclone separator is inserted below the liquid level of the sewage tank. An exhaust valve is provided above the sewage tank and leads to the outside of the laboratory. An outlet pipe is installed below the sewage tank and leads to the sewage treatment pool.

[0012] The heater adopts an electric heater, a hot oil heater, or a hot gas heater.

[0013] When multiple sets of operations by multiple people are required for the original sample dissolver, the solvent bottle, and the heating reactor in a laboratory, the harmful gas exhaust ports are connected in parallel and then sent to the micro-cyclone separator for treatment.

[0014] The harmless treatment device can adopt an automatic control device to realize the control of the processes of dissolution, heating, and exhaust.

[0015] The advantages of the present utility model are:

[0016] 1. The harmless treatment device of the present utility model solves the problem that most experimenters in current chemical analysis laboratories operate in a fume hood or simply turn on the ventilation fan in the laboratory. It can extract the harmful and toxic gases from the original sample dissolver, solvent bottle, and heating reactor, absorb them into the sewage tank through an absorbent and a micro-cyclone separator. As long as the corresponding absorbent is adopted according to the chemical reaction process, the harmful and toxic gases can be basically completely reacted. Even if there are still a small amount of harmful gases, they can be vented outside the laboratory through the exhaust valve above the sewage tank, ensuring the physical health of the experimenters.

[0017] 2. The whole set of equipment is reasonably designed, and the waste residue, waste gas, and waste water can be well discharged, and it can also ensure the analysis sample treatment. Even after the experiment is completed by instrumental analysis, the experimenter can pour the experimental solution into the sewage tank and then send it to the sewage treatment pool for further treatment, avoiding direct pouring into the sink and causing pollution to the sewer.

[0018] 3. Separating the original sample dissolver and the heating reactor has many advantages. Because some samples do not need to be heated and can react in the dissolver, the heater does not need to be started, and the test sample can be obtained by simple filtration.

[0019] 4. When multiple sets of equipment are needed for multiple people to operate the original sample dissolver, solvent bottle, and heating reactor in a laboratory, the harmful gas exhaust ports are connected in parallel and then sent to the micro-cyclone separator for treatment.

[0020] 5. The harmless treatment device of the present utility model can adopt an automatic control device to realize the control of the processes of dissolution, heating, and exhaust, which is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the sample harmless treatment device for a chemical analysis laboratory of the present utility model.

[0022] The corresponding component names of the numerical numbers in the figure are as follows:

[0023] 1. Original sample dissolver; 2. Stirrer; 3. Heating reactor; 4. Heater; 5. Filter; 6. Filter screen; 7. Specimen bottle; 8. Solvent bottle; 9. Micro-cyclone separator; 10. Exhaust valve; 11. Sewage tank; 12. Analytical instrument; 13. Display and printer. DETAILED DESCRIPTION OF THE INVENTION

[0024] Such as Figure 1As shown in the figure, a harmless treatment device for chemical analysis laboratory samples includes an original sample dissolver (1), a solvent bottle (8), a heating reactor (3), a filter (5), a micro cyclone separator (9) and a sewage tank (11). The solvent bottle (1) is connected to the original sample dissolver (8). The original sample dissolver (1) is equipped with a stirrer (2). The outlet of the original sample dissolver (1) leads to the heating reactor (3) and then enters the filter (5). The experimenter takes out the sample and puts it into the sample bottle (7), and measures it through the analytical instrument (12). The harmful gas exhaust port above the heating reactor (3) is connected to the side cut-in pipe of the micro cyclone separator (9). The top of the micro cyclone separator (9) is provided with an absorbent injection pipe. The absorbent injection pipe at the top of the micro cyclone separator (9) can be connected to a pressure pump, and the harmful and toxic gases are absorbed by spraying down under a certain pressure. The bottom pipe of the micro cyclone separator (9) leads to the sewage tank (11).

[0025] A heater (4) is installed inside the heating reactor (3); the heater (4) adopts an electric heater, a hot oil heater or a hot gas heater.

[0026] A sampling outlet pipe is provided at the lower part of the filter (5). A switch (not shown in the figure) can be installed on the sampling outlet pipe. The sampling outlet pipe for the experimenter mainly provides samples for analysis.

[0027] A filter screen (6) is installed inside the filter (5), and a slag discharge port is provided. A switch can be installed on the sampling outlet pipe.

[0028] The outlet pipe of the micro cyclone separator (9) is inserted under the liquid in the sewage tank (11); an exhaust valve (10) is provided above the sewage tank (11) and leads to the outside of the laboratory; an outlet pipe is installed below the sewage tank (11) and leads to the sewage treatment pool.

[0029] When multiple sets of operations by multiple people are required for the original sample dissolver (1), the solvent bottle (8) and the heating reactor (3) in a laboratory, the harmful gas exhaust ports are connected in parallel and then sent to the micro cyclone separator (9) for treatment.

[0030] The harmless treatment device can adopt an automatic control device to realize the control of the processes of dissolution, heating and exhaust.

[0031] The application process of the present utility model is described below in conjunction with two embodiments:

[0032] Example 1, determining the content of manganese metal in high-sulfur manganese ore:

[0033] The detailed steps are as follows:

[0034] First, place the dissolver 1 into the high-sulfur manganese ore, and put the solvent bottle 8 into concentrated sulfuric acid. Add the concentrated sulfuric acid to the dissolver 1 and start the stirrer to turn the high-sulfur manganese ore into manganese sulfate solution. After dissolution, it enters the heating reactor 3. Control the reaction temperature. Since hydrogen sulfide, sulfur dioxide, carbon dioxide, acid mist, and dust are generated in the gas, the gas enters the side cut-in pipe of the micro-cyclone separator 9 from the upper part of the heating reactor 3. The absorbent at the top of the micro-cyclone separator 9 is a 6 - 15% sodium hydroxide aqueous solution, which sprays down to absorb acidic hydrogen sulfide, sulfur dioxide, carbon dioxide gases, acid mist, and dust, and turns into neutral sodium sulfate and sodium carbonate in the sewage tank 11, and then is discharged from the bottom of the sewage tank 11 to the outdoor sewage treatment pool for treatment; the solution coming out of the heating reactor 3 is manganese sulfate, which is filtered through the filter mesh of the filter 5 and taken out and placed in the sample bottle 7. Then the sample can be measured by the analytical instrument 12 to determine the content of metallic manganese in the manganese sulfate solution, and finally the experimental results are printed on the monitor or printer 13.

[0035] Example 2, determination of the benzene content in paint:

[0036] As is well known, if organic solvents such as benzene (benzene, toluene, xylene) are used as solvents in some current paint coatings, the benzene is prone to volatilize to form an explosive mixed gas. Moreover, during spraying, the volatile gas will greatly affect the physical health of the staff. Therefore, when producing products or when users purchase products, it is necessary to analyze and determine the benzene content in the paint coatings to understand the protective measures taken.

[0037] According to Figure 1 the equipment situation, first load the paint coating to be analyzed provided by a certain supplier into the original sample dissolver 1, put the solvent bottle 8 into ethyl acetate (solvent), mix it with the paint coating, and then enter the heating reactor 4. Appropriately heat it according to the dissolution situation to make the paint coating fully dissolve. Then enter the filter 5, filter the residue in the paint coating with the filter mesh 6, and the sample bottle 7 obtains the sample to be analyzed. Then use the analytical instrument 12, a gas chromatograph (model GC - 9280, produced by Puri Company), to detect the benzene and homologues content in the paint. The results are obtained on the monitor and printer. In this way, it can realize qualitative and quantitative detection of benzene, toluene, and xylene in the paint with one injection. The harmful and toxic gases in the paint coating enter the side cut-in pipe of the micro-cyclone separator 9 in the heating reactor 4, and ethanol or a solvent suitable for dissolving harmful and toxic gases is sprayed down from the top of the micro-cyclone separator 9, and then enters the solution in the sewage tank 11 at the lower part of the micro-cyclone separator 9 to prevent laboratory personnel from inhaling and getting poisoned.

[0038] Attached: Standard samples used in the analysis process: benzene (guaranteed reagent, Tianjin Guangfu Fine Chemical Research Institute); toluene (analytical reagent, Xi'an Chemical Reagent Factory); xylene (analytical reagent, Tianjin Pharmaceutical Company); ethyl acetate (analytical reagent, Tianjin Fuyu Fine Chemical Co., Ltd.); the paint samples are topcoats and primers provided by a certain supplier in Guangxi.

[0039] Specific analysis steps (omitted as they do not pertain to the device of the present utility model).

Claims

1. A harmless treatment device for samples in a chemical analysis laboratory, characterized in that: The device includes an original sample dissolver (1), a solvent bottle (8), a heating reactor (3), a filter (5), a micro-cyclone separator (9) and a sewage tank (11). The solvent bottle (8) is connected to the original sample dissolver (1). The outlet of the original sample dissolver (1) leads to the heating reactor (3), and then enters the filter (5). The experimenter takes out the sample and puts it into a sample bottle (7) for determination by an analytical instrument (12). The exhaust port for harmful gases above the heating reactor (3) is connected to the side cut-in pipe of the micro-cyclone separator (9). The top of the micro-cyclone separator (9) is provided with an absorbent injection pipe, and the bottom pipe of the micro-cyclone separator (9) leads to the sewage tank (11). The original sample dissolver (1) is provided with a stirrer (2). Inside the heating reactor (3), a heater (4) is installed. At the lower part of the filter (5), a sampling outlet pipe is provided for analysis use.

2. The harmless treatment device for chemical analysis laboratory samples according to claim 1, characterized in that: Inside the filter (5), a filter net (6) is installed, and a slag discharge port is provided. A switch can be installed on the sampling outlet pipe.

3. The harmless treatment device for chemical analysis laboratory samples according to claim 1, characterized in that: The absorbent injection pipe at the top of the micro-cyclone separator (9) can be connected to a pressure pump, and the outlet pipe of the micro-cyclone separator (9) is inserted below the liquid level of the sewage tank (11). An exhaust valve (10) is provided above the sewage tank (11) and leads to the outside of the laboratory. An outlet pipe is installed below the sewage tank (11) and leads to a sewage treatment pool.

4. The chemical analysis laboratory sample harmless treatment device according to claim 1, characterized in that: The heater (4) uses an electric heater, a hot oil heater or a hot gas heater.

5. The harmless treatment device for chemical analysis laboratory samples according to claim 1, wherein: When multiple sets of the original sample dissolver (1), solvent bottle (8) and heating reactor (3) need to be operated by multiple people in a laboratory, the exhaust ports for harmful gases are connected in parallel and then sent to the micro-cyclone separator (9) for treatment.

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