CN214622493U - High chlorine waste water chemical oxygen demand's survey device - Google Patents
High chlorine waste water chemical oxygen demand's survey device Download PDFInfo
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- CN214622493U CN214622493U CN202120930442.1U CN202120930442U CN214622493U CN 214622493 U CN214622493 U CN 214622493U CN 202120930442 U CN202120930442 U CN 202120930442U CN 214622493 U CN214622493 U CN 214622493U
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Abstract
The utility model provides a survey device of high chlorine waste water chemical oxygen demand, the reactor comprises a reaction flask, the reaction part that heating device and back flow are constituteed, the reaction flask is located the heating device top, the back flow is located the reaction flask top, lower part and reaction flask intercommunication, the back flow outside sets up water cooling plant, the reaction flask still connects the nitrogen gas intake pipe, back flow upper portion is passed through air duct intercommunication absorption bottle, absorption bottle top intercommunication shower, shower upper portion is through spraying liquid conveyer pipe intercommunication absorption flask, set up the force pump on the spraying liquid conveyer pipe, the device is applicable to potassium dichromate method survey chlorine waste water chemical oxygen demand, can accurate correction survey result, the reproducibility is high. The utility model discloses set up the shower above the absorption bottle, constantly spray the absorption liquid through the peristaltic pump, the inside alternating expression barb that is provided with of shower to make the absorption liquid be the graininess, enlarge the absorption area, improve absorption efficiency, improved chlorine correction accuracy, the testing result reproducibility is high.
Description
Technical Field
The utility model belongs to the waste water treatment field, concretely relates to high chlorine waste water chemical oxygen demand measuring device.
Background
The determination of chemical oxygen demand usually comprises adding potassium dichromate or potassium permanganate into a water sample to oxidize organic matters, wherein in the potassium dichromate method, silver salt is used as a catalyst in a strong acid medium, after heating and refluxing, ferrocyanide is used as an indicator, ammonium ferrous sulfate is used for titration, the amount of the consumed ammonium ferrous sulfate can calculate the amount of unreacted potassium dichromate, and finally the amount of the potassium dichromate consumed by the organic matters is obtained; the potassium permanganate method is that sulfuric acid and a certain amount of potassium permanganate are added into a water sample, heating and refluxing are carried out, excess oxalic acid solution is added into the residual potassium permanganate for reduction, and then the oxalic acid solution is dripped back by the potassium permanganate solution, so that the amount of the potassium permanganate consumed by organic matters is obtained.
When a water sample contains chloride ions, potassium dichromate or potassium permanganate reacts with the chloride ions under an acidic condition to cause a large measurement result, and in order to avoid the influence of the chloride ions on the measurement of the chemical oxygen demand, mercury sulfate is generally used as a shielding agent to form a complex compound of the chloride ions and the mercury sulfate, and the added amount is generally that the mass ratio of the mercury sulfate to the chloride ions is 10: 1, the method is suitable for water samples with the chloride ion content of less than 1000mg/L, when the chloride ion content is more than 1000mg/L, the added mercury sulfate amount is large, the judgment of the final titration end point is influenced, simultaneously, the complex generated by the two is unstable, and when the chloride ion content is high, the possibility of complex dissociation is also large.
At present, the chemical oxygen demand of wastewater with the chloride ion content higher than 1000mg/L is measured by two standards of an industrial standard HJ/T70-2001 and an industrial standard HJ 132-2003. HJ/T70-2001 is that organic matters and chloride ions in a potassium dichromate oxidation water sample are absorbed by the generated chlorine, and the chemical oxygen demand is corrected by the chlorine; HJ132-2003 adopts potassium permanganate to oxidize organic matters in the water sample under alkaline conditions, and the potassium permanganate can not oxidize chloride ions under alkaline conditions, so that the influence of the chloride ions in the water sample on the determination of the chemical oxygen demand is avoided.
HJ/T70-2001 and HJ132-2003 have certain disadvantages in the actual application and measurement process, HJ/T70-2001 oxidize organic matters in a water sample with potassium dichromate to generate chlorine, high-purity nitrogen is introduced to blow out the chlorine, the chlorine is directly introduced into a sodium hydroxide solution in an absorption bottle, a circulating spray absorption device is not provided, whether the absorption is completely related to the blowing-out rate of the nitrogen and the depth of a gas guide tube penetrating into the lower part of an absorption liquid surface or not is determined, the operation requirement is extremely high, and the reproducibility of the determination result is poor; HJ132-2003 uses potassium permanganate to oxidize organic matters in a water sample under an alkaline condition, but the oxidability of potassium permanganate is limited, and when the water sample contains organic matters which are difficult to oxidize, a determination result cannot accurately reflect the content of the organic matters in the water sample, so that a potassium dichromate method is mostly adopted to determine the chemical oxygen demand of the water sample at present.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that exists among the prior art, the utility model provides a high chlorine waste water chemical oxygen demand measuring device.
In order to realize the above problem, the utility model adopts the following technical scheme:
the utility model provides a high chlorine waste water chemical oxygen demand's survey device, include by the reaction flask, the reaction part that heating device and back flow are constituteed, the reaction flask is located the heating device top, the back flow is located the reaction flask top, lower part and reaction flask intercommunication, the back flow outside sets up water cooling plant, the nitrogen gas intake pipe is still connected to the reaction flask, air duct intercommunication absorption bottle is passed through on back flow upper portion, absorption bottle top intercommunication shower, shower upper portion is through spraying liquid conveyer pipe intercommunication absorption flask, it sets up the force pump on the liquid conveyer pipe to spray, the shower outside sets up water cooling plant.
Staggered barbs are arranged in the spray pipe.
The pressure pump is a peristaltic pump.
The nitrogen gas inlet pipe and the gas guide pipe are both glass pipes, and resin pipes are adopted at the joints between the glass pipes; the spraying liquid conveying pipe at the pump head part of the peristaltic pump adopts a plastic hose, and the spraying liquid conveying pipes at other parts between the absorption bottle and the spraying pipe are glass pipes.
The heating device is an electric furnace.
The utility model provides a high chlorine waste water chemical oxygen demand survey device sets up the shower above the absorption bottle, constantly sprays the absorption liquid through the peristaltic pump, and the inside alternating expression barb that is provided with of shower to make the absorption liquid be the graininess, enlarge the absorption area, improve absorption efficiency, improved chlorine and revised the accuracy, the testing result reproducibility is high.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The device comprises a reaction bottle 1, a reaction bottle 2, a return pipe 3, an electric furnace 4, an air guide pipe 5, a cooling water inlet 6, a cooling water outlet 7, a nitrogen inlet pipe 8, an absorption bottle 9, a spray pipe 10, a peristaltic pump 11, a resin pipe 12, a spray liquid conveying resin pipe 13 and a spray liquid conveying pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The utility model discloses a high chlorine waste water chemical oxygen demand measuring device is applicable to potassium dichromate method survey chlorine waste water chemical oxygen demand, and required medicine, medicine configuration concentration, calculation method execution industry standard HJ/T70-2001. Chlorine ions in the wastewater are oxidized into chlorine gas and absorbed by the absorption part, and the chemical oxygen demand is determined by correcting the generated chlorine gas, wherein the accuracy of the correction is related to whether the absorption part is completely absorbed.
As shown in fig. 1, a chemical oxygen demand measuring device for high chlorine wastewater comprises a reaction part and an absorption part, wherein the reaction part adopts a reflux heating mode and consists of a reaction bottle 1, a heating device and a reflux pipe 2, the reaction bottle 1 is positioned above the heating device, the heating device is an electric furnace 3, and can be heated by light waves, alcohol lamps, water baths, oil baths or other heating modes, the reflux pipe 2 is positioned above the reaction bottle 1, the lower part of the reflux pipe is communicated with the reaction bottle 1, a water cooling device is arranged outside the reflux pipe 2, namely a cooling water channel is arranged outside the reflux pipe, cooling water enters from a cooling water inlet 5 at the lower part and flows out from a cooling water outlet 6 at the upper part, and the reaction bottle 1 is also connected with a nitrogen inlet pipe 7; the absorption part adopts a spraying absorption mode and consists of an absorption bottle, a spraying pipe and a peristaltic pump, the upper part of a backflow pipe 2 is communicated with the absorption bottle 8 through an air duct 4, strong sodium oxide alkali liquor is contained in the absorption bottle 8, the spraying pipe 9 is communicated above the absorption bottle 8, staggered barbs are arranged in the spraying pipe 9 to enable the absorption liquid to be granular, the contact area of the absorption liquid and gas is enlarged, the absorption efficiency is improved, the upper part of the spraying pipe is communicated with the absorption bottle 8 through a spraying liquid conveying pipe 13, a pressure pump is arranged on the spraying liquid conveying pipe, the pressure pump adopts a peristaltic pump 10, the absorption liquid is continuously extracted through the peristaltic pump 10 and is sprayed to the upper part of the spraying pipe 9, the absorption liquid is sprayed circularly, the absorption effect is better, and chlorine generated by the reaction part is completely absorbed; the outside of the spray pipe is also provided with a water cooling device, the water cooling device, namely the outside of the return pipe, is provided with a cooling water channel, and cooling water enters from a lower cooling water inlet 5 and flows out from an upper cooling water outlet 6.
The nitrogen inlet pipe 7 and the gas guide pipe 4 are both glass pipes, and the joint between the glass pipes is a resin pipe 11; the spraying liquid conveying pipe at the pump head part of the peristaltic pump adopts a plastic hose 12, and the spraying liquid conveying pipes 13 at other parts between the absorption bottle and the spraying pipes are glass pipes.
The reaction process is as follows: adding a water sample, potassium dichromate, mercury sulfate (added according to the mass ratio of mercury sulfate: chloride ion = 10: 1), silver sulfate-sulfuric acid and glass beads into a reaction bottle 1 (which can be a flask), adding a sodium hydroxide solution with the mass concentration of 2% into an absorption bottle 8, sequentially connecting the reaction bottle 1, a return pipe 2, a gas guide pipe 4, the absorption bottle 8, a spray pipe 9, a peristaltic pump 10, a resin pipe 11, a plastic hose 12 and a spray liquid conveying pipe 13, placing the reaction bottle 1 on an electric furnace 3, connecting a cooling water inlet 5 and a cooling water outlet 6 with a cooling water system, introducing high-purity nitrogen with the purity of more than 99.9% into a high-purity nitrogen inlet pipe 7, opening the electric furnace 3 and the peristaltic pump 10, heating the electric furnace for 2 hours, and continuing introducing nitrogen until the device is completely cooled after heating.
Compared with the prior art, the utility model provides a survey device of high chlorine waste water chemical oxygen demand sets up the shower above the absorption bottle, constantly sprays the absorption liquid through the peristaltic pump, and the inside staggered form barb that is provided with of shower to make the absorption liquid be the graininess, enlarge the absorption area, improve absorption efficiency, improved chlorine and revised the accuracy, the testing result reproducibility is high.
Claims (5)
1. The utility model provides a survey device of high chlorine waste water chemical oxygen demand which characterized in that: including the reaction part of constituteing by the reaction flask, heating device and back flow, the reaction flask is located the heating device top, the back flow is located the reaction flask top, lower part and reaction flask intercommunication, the back flow outside sets up water cooling plant, the nitrogen gas intake pipe is still connected to the reaction flask, back flow upper portion is passed through air duct intercommunication absorption bottle, absorption bottle top intercommunication shower, shower upper portion is through spraying liquid conveyer pipe intercommunication absorption bottle, spray the last force pump that sets up of liquid conveyer pipe, the shower outside sets up water cooling plant.
2. The apparatus for determining chemical oxygen demand of high chlorine wastewater according to claim 1, wherein: staggered barbs are arranged in the spray pipe.
3. The apparatus for determining chemical oxygen demand of high chlorine wastewater according to claim 1, wherein: the pressure pump is a peristaltic pump.
4. The apparatus for determining chemical oxygen demand of high chlorine wastewater according to claim 1 or 3, wherein: the nitrogen gas inlet pipe and the gas guide pipe are both glass pipes, and resin pipes are adopted at the joints between the glass pipes; the spraying liquid conveying pipe at the pump head part of the peristaltic pump adopts a plastic hose, and the spraying liquid conveying pipes at other parts between the absorption bottle and the spraying pipe are glass pipes.
5. The apparatus for determining chemical oxygen demand of high chlorine wastewater according to claim 1, wherein: the heating device is an electric furnace.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120930442.1U CN214622493U (en) | 2021-04-30 | 2021-04-30 | High chlorine waste water chemical oxygen demand's survey device |
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| CN202120930442.1U CN214622493U (en) | 2021-04-30 | 2021-04-30 | High chlorine waste water chemical oxygen demand's survey device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115753311A (en) * | 2022-10-31 | 2023-03-07 | 上海博取仪器有限公司 | Dechlorination device and chemical oxygen demand detection system comprising same |
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2021
- 2021-04-30 CN CN202120930442.1U patent/CN214622493U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115753311A (en) * | 2022-10-31 | 2023-03-07 | 上海博取仪器有限公司 | Dechlorination device and chemical oxygen demand detection system comprising same |
| CN115753311B (en) * | 2022-10-31 | 2023-09-01 | 上海博取仪器有限公司 | Chlorine removal installation and contain its chemical oxygen demand detecting system |
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