Background
The chemical dissolution method is the most commonly used method for the content test and analysis of textile fibers. The ISO 1833 series and GB2910 series of test standards both specify a series of chemical dissolution methods for the analysis of the fibre content of textiles of different composition. The main principle of the series of methods is to realize effective separation by utilizing different fiber components with different solubility in different solvents, so as to obtain the specific content of a certain component. The basic steps are firstly selecting a proper solvent according to the result of qualitative analysis of the fiber, then putting a textile sample into the solvent, dissolving one or more components in the solvent under a certain temperature condition, drying and weighing the residue after filtering the solution, and calculating the proportion of the soluble components according to the mass loss.
In the tests, strong acid such as sulfuric acid and nitric acid, strong base such as sodium hydroxide and sodium hypochlorite, or organic solvent such as N, N-dimethylformamide and acetone are usually selected as the solvent for dissolving the fibers, so that a large amount of waste liquid such as acid liquid, alkali liquid and various organic solvents is generated after the textile sample is dissolved and filtered. At present, a laboratory generally adopts a single suction filtration device, does not effectively classify and recycle the generated waste liquid, easily pollutes the environment and does not meet the requirement of green development.
Patent publication No. CN205752435U, Chinese utility model patent that the announcement day is 2016.11.30 discloses a waste lithium ion battery's recovery unit, including retrieving the cauldron, set up in the vacuum transition cabin of retrieving the cauldron both sides, set up the box that is used for placing electric core in retrieving the cauldron, set up in retrieving the cauldron upper end and be used for carrying out the solvent spray opening that drip washes to electric core in the box, set up in the box liquid outflow switch in the box lower right corner, and retrieve the stainless steel screen cloth of cauldron lower extreme, the filter core, retrieve cauldron liquid outflow switch, middle porose rubber buffer and vacuum buchner flask.
But the recovery unit in this utility model patent has categorised recovery effect poor problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a categorised filtration of waste liquid and recovery unit when chemical dissolution method survey fibre content, it can reach the effect of acidizing fluid, alkali lye and the categorised recovery of organic solvent through the mode of connecting three recovery unit on suction filtration pump unit. The utility model has the advantages of waste liquid classification filtration recovery is rational in infrastructure effective, and suction filtration operation is effectual, the waste liquid filters thoroughly, and three suction filtration recovery structures open and shut and adjust simple and conveniently to and waste liquid pertinence recovery is effectual, and environmental pollution is little.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a categorised filtration of waste liquid and recovery unit when chemical dissolution method survey fibre content, is including being used for filtering and retrieving the first recovery unit of acidizing fluid, the second recovery unit that is used for filtering and retrieving alkali lye, the third recovery unit that is used for filtering and retrieving organic solvent to and be used for carrying out the suction filtration pump unit of suction filtration to first recovery unit, second recovery unit and third recovery unit.
The further preferred technical scheme is as follows: the first recovery unit comprises a first filter flask used for receiving acid liquor filtered off, a first sand core crucible arranged on the first filter flask and used for filtering after dissolving the fiber to be detected by the acid liquor method, an acid liquor recovery barrel and an acid liquor recovery pipe used for connecting the first filter flask and the acid liquor recovery barrel.
The further preferred technical scheme is as follows: the first recovery unit further comprises a first stop valve which is arranged on the acid liquor recovery pipe and used for blocking the first filter flask and the acid liquor recovery barrel when the suction filtration pump unit performs suction filtration on the first sand core crucible.
The further preferred technical scheme is as follows: the second recovery unit comprises a second suction bottle for receiving filtered alkali liquor, a second sand core crucible arranged on the second suction bottle and used for dissolving and filtering fibers to be detected by an alkali liquor method, an alkali liquor recovery barrel and an alkali liquor recovery pipe used for connecting the second suction bottle and the alkali liquor recovery barrel.
The further preferred technical scheme is as follows: the second recovery unit further comprises a second stop valve which is arranged on the alkali liquor recovery pipe and used for blocking the second filter flask and the alkali liquor recovery barrel when the suction filtration pump unit performs suction filtration on the second sand core crucible.
The further preferred technical scheme is as follows: the third recovery unit comprises a third filter flask for receiving filtered organic solvent, a third sand core crucible arranged on the third filter flask and used for dissolving and filtering the fiber to be detected by the organic solvent method, an organic solvent recovery barrel and an organic solvent recovery pipe used for connecting the third filter flask with the organic solvent recovery barrel.
The further preferred technical scheme is as follows: the third recovery unit further comprises a third stop valve which is arranged on the organic solvent recovery pipe and used for blocking the third filter flask and the organic solvent recovery barrel when the suction filtration pump unit performs suction filtration on the third sand core crucible.
The further preferred technical scheme is as follows: the suction filtration pump unit comprises a suction filtration pump, a four-way valve, suction filtration pipes arranged between the suction filtration pump and the four-way valve, three connecting pipes respectively arranged between the four-way valve and the first recovery unit, the second recovery unit and the third recovery unit, and suction filtration stop valves respectively arranged on the three connecting pipes.
The further preferred technical scheme is as follows: the suction filtration pump unit further comprises a pipe body fixing plate, a suction filtration pipe fixing hole formed in the pipe body fixing plate, and three pipe body clamping grooves formed in the positions of the side edges of the pipe body fixing plate and used for clamping and fixing the connecting pipes respectively, wherein the cross sections of the pipe body clamping grooves are arc arcs.
The further preferred technical scheme is as follows: the pipe fixing plate comprises a main plate and an auxiliary plate, wherein the main plate and the auxiliary plate are provided with a pipe clamping groove, a plug-in column, a plug-in groove and two permanent magnet sheets, the plug-in column is arranged on the opposite side surfaces of the main plate and the auxiliary plate, the two permanent magnet sheets are arranged on the plug-in end surface of the plug-in column and the inner bottom surface of the plug-in groove in a bonding mode, and arc-shaped grooves used for being in butt joint with the suction filtration pipe fixing hole are formed in the.
The utility model discloses a connect the mode of three recovery unit on suction filtration pump unit, reach the effect of acidizing fluid, alkali lye and the categorised recovery of organic solvent. The utility model has the advantages of waste liquid classification filtration recovery is rational in infrastructure effective, and suction filtration operation is effectual, the waste liquid filters thoroughly, and three suction filtration recovery structures open and shut and adjust simple and conveniently to and waste liquid pertinence recovery is effectual, and environmental pollution is little.
Example (b): as shown in fig. 1, 2 and 3, the device for classifying, filtering and recovering waste liquid during the determination of fiber content by chemical dissolution comprises a first recovery unit 1 for filtering and recovering acid liquid, a second recovery unit 2 for filtering and recovering alkali liquid, a third recovery unit 3 for filtering and recovering organic solvent, and a suction filtration pump unit 4 for suction filtration of the first recovery unit 1, the second recovery unit 2 and the third recovery unit 3.
In this embodiment, when the fiber content is measured by a chemical dissolution method, for example, a sulfuric acid solution is used to dissolve the cellulose fiber, for example, a sodium hypochlorite solution is used to dissolve the mulberry silk, for example, an N, N-dimethylformamide solution is used to dissolve the spandex, so three types of waste liquids, namely acid, alkali and organic solvent, are generated, and if the three types of waste liquids are simply mixed and discharged, the environment is greatly affected, so that in this embodiment, the three suction filtration recovery units are respectively used to suction filtration and recover the acid, alkali and organic solvent, thereby ensuring the final classification suction filtration and recovery effect.
The first recovery unit 1 comprises a first filter bottle 101 for receiving acid liquor to be filtered, a first sand core crucible 102 arranged on the first filter bottle 101 and used for filtering after dissolving the fiber to be detected by an acid liquor method, an acid liquor recovery barrel 103, and an acid liquor recovery pipe 104 used for connecting the first filter bottle 101 and the acid liquor recovery barrel 103. The first recovery unit 1 further includes a first stop valve 105 disposed on the acid liquor recovery pipe 104 and configured to block the first filter flask 101 and the acid liquor recovery tank 103 when the first sand-core crucible 102 is subjected to suction filtration by the suction pump unit 4.
In this embodiment, the first filter flask 101 and the acid liquor recovery pipe 104 are made of acid-resistant existing materials, the acid liquor recovery pipe 104 is in sealed insertion with the first filter flask 101, a rubber ferrule for sealing is arranged between the first sand core crucible 102 and the first filter flask 101, the first sand core crucible 102 is an existing glass sand core filter, the first filter flask 101 adopts an existing bottle body specification, the capacity is 2.5L, the inner diameter of a bottle mouth is 54mm, two outlets are arranged at a position 10mm away from the bottom of the filter flask and a position 63mm away from the bottle mouth and respectively serve as a filter opening and a liquid discharge opening, and when the filter pump unit 4 performs suction filtration, the first stop valve 105 is closed, so that the suction filtration efficiency is improved, and the discharged waste liquor is prevented from being pumped back again.
The second recovery unit 2 comprises a second filter flask 201 for receiving filtered alkali liquor, a second sand core crucible 202 arranged on the second filter flask 201 and used for dissolving and filtering fibers to be detected by an alkali liquor method, an alkali liquor recovery barrel 203 and an alkali liquor recovery pipe 204 used for connecting the second filter flask 201 and the alkali liquor recovery barrel 203. The second recovery unit 2 further comprises a second stop valve 205 arranged on the lye recovery pipe 204 and used for blocking the second filter flask 201 and the lye recovery tank 203 when the second sand core crucible 202 is filtered by the filter pump unit 4.
In this embodiment, the structure, specification, and usage method of the second recovery unit 2 are the same as those of the first recovery unit 1, and the second recovery unit 2 is used for recovering alkali liquor by suction filtration after being replaced with an alkali-resistant material, and the operation of recovering alkali liquor by the second recovery unit 2 and the operation of recovering acid liquor by the first recovery unit 1 are not affected by each other, and the suction filtration pump unit 4 is provided with a suction filtration open-close valve.
The third recovery unit 3 comprises a third filter flask 301 for receiving the filtered organic solvent, a third sand core crucible 302 arranged on the third filter flask 301 for dissolving and filtering the fiber to be tested by the organic solvent method, an organic solvent recovery barrel 303, and an organic solvent recovery pipe 304 for connecting the third filter flask 301 and the organic solvent recovery barrel 303. The third recovery unit 3 further includes a third stop valve 305 disposed on the organic solvent recovery pipe 304 and configured to block the third filter flask 301 and the organic solvent recovery tank 303 when the filter pump unit 4 performs suction filtration on the third sand core crucible 302.
In this embodiment, the structure, specification, and usage method of the third recovery unit 3 are the same as those of the first recovery unit 1, and the third recovery unit 3 is used for suction filtration and recovery of an organic solvent only after being replaced with an organic solvent-resistant material, the three suction filtration recovery units operate independently, the suction filtration pump unit 4 can suction-filter one, two, or three of the three suction filtration recovery units simultaneously, which suction filtration recovery unit contains a fiber after dissolution and is to be filtered, that is, a suction filtration channel between the suction filtration recovery unit and the suction filtration pump unit 4 is opened, so as to finally ensure that the waste liquid classification filtration and recovery device can recover three types of waste liquids in a targeted manner without mutual interference.
The suction pump unit 4 includes a suction pump 401, a four-way valve 402, a suction pipe 403 disposed between the suction pump 401 and the four-way valve 402, three connection pipes 404 respectively disposed between the four-way valve 402 and the first recovery unit 1, the second recovery unit 2, and the third recovery unit 3, and suction stop valves 405 respectively disposed on the three connection pipes 404.
In this embodiment, the suction pump 401 may be a rotary vane vacuum pump, a circulating water vacuum pump, a diaphragm vacuum pump, or the like, which are commonly used, the suction speed is not lower than 1L/s, the outer diameter of the air inlet is 10mm, the four-way valve 402 is used to connect the suction pump 401 and three suction bottles, the outer diameter of the interface is 10mm, and the suction pipe 403 and the connecting pipe 404 should not be too long, which is generally 20-30cm in consideration of the actual suction effect.
The suction filtration pump unit 4 further includes a tube fixing plate 406, a suction filtration tube fixing hole 407 formed in the tube fixing plate 406, and three tube engaging grooves 408 formed at the side of the tube fixing plate 406 and adapted to engage and fix the connecting tube 404, respectively, wherein the cross section of the tube engaging groove 408 is an arc-shaped arc. The tube fixing plate 406 includes a main plate 406a and an auxiliary plate 406b having the tube engaging groove 408, an inserting post 406c and an inserting groove 406d respectively disposed on opposite side surfaces of the main plate 406a and the auxiliary plate 406b, and two permanent magnet pieces 406e adhesively disposed on an inserting end surface of the inserting post 406c and an inner bottom surface of the inserting groove 406d, wherein the main plate 406a and the auxiliary plate 406b are respectively provided with an arc-shaped groove for forming the suction filtration tube fixing hole 407 by butt joint.
In this embodiment, the tube fixing plate 406 is used to fix a total of four tubes when the whole waste liquid classifying, filtering and recycling device is idle, the suction filter fixing hole 407 is always sleeved on the suction filter tube 403, and the three connecting tubes 404 are clamped on the tube clamping groove 408 after being taken off from the suction filter flask, so as to avoid that the four tubes are inconvenient to integrate due to an excessively large overall structure after being provided with a four-way valve.
On the other hand, the insertion column 406c is inserted and fixed with the insertion groove 406d, and the two permanent magnet pieces 406e are mutually attracted by magnetic force, so that the main board 406a and the auxiliary board 406b are mutually installed and fastened, the connection strength is suitable, the suction filtration pipe fixing hole 407 is convenient to open, and the pipe fixing plate 406 is convenient to take down from the pipe fixing plate 406.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. These are non-inventive modifications, which are intended to be protected by patent laws within the scope of the appended claims.