CN2074453U - Enclosed cod suppressor - Google Patents
Enclosed cod suppressor Download PDFInfo
- Publication number
- CN2074453U CN2074453U CN 90215348 CN90215348U CN2074453U CN 2074453 U CN2074453 U CN 2074453U CN 90215348 CN90215348 CN 90215348 CN 90215348 U CN90215348 U CN 90215348U CN 2074453 U CN2074453 U CN 2074453U
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- cod
- sealing gasket
- eliminating
- pipe
- digestion
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Abstract
The utility model discloses a closed COD eliminating device for measuring COD in waste water which contains high chloride ion (greater than 2000 mg/l). The closed COD eliminating device comprises an eliminating furnace and an eliminating pipe. The eliminating furnace adopts an electric heating element to heat the eliminating pipe in a timing and temperature control mode, and the pipe port of the eliminating pipe is flanged and abraded. A leather bowl-shaped sealing gasket is arranged on the pipe port of the eliminating pipe, and the sealing gasket generates plastic deformation by the tightening force of a tightening nut to achieve sealing effect. The closed COD eliminating device which is adopted can eliminate the interference and the influence of the chloride ion for measuring COD, and the measurement is simple, convenient and quick. The accuracy is high, and the measured value is the actual COD-[cr] value which does not need to be corrected again.
Description
The utility model is the relevant COD in the water that measures
CrInstrument, specifically contain COD in the waste water of high chloride ion concentration about mensuration
CrThe water sample digestion device.
Chemical oxygen demand cod is one of important indicator of water quality assessment.Accurately measure the chemical oxygen consumption (COC) of waste water, for weighing and evaluating water quality, judge pollution level and treatment effect, it all is very necessary taking suitable aspects such as Preventing Countermeasures.
But, when containing in the waste water, adopt conventional COD greater than the 2000mg/l chlorion
CrDetermining instrument is because the interference and the influence of chlorion can not record COD exactly
CrNumerical value.In order to eliminate interference and the influence that chlorion is measured COD, many researchers have carried out extensive work, have successively proposed the silver nitrate precipitation method, control acidity method and calibration curve method etc.But, thereby be not widely adopted all because of reasons such as measurement operation bother, and data calibration difficulty, measurement result are accurate inadequately.
Then the someone has proposed to measure in confined conditions the method for the COD that contains high chloride ion waste water, and to seek to suppress the chlorion oxidation, control chlorine is overflowed.For this reason, have with making sealed digestion behind the glass ampule bottle closure, have with polytetrafluoroethylene film band wrapping ground glass stoppered bottle bottle stopper.But the former complex operation, and ampoule bottle can not be reused after once clearing up; Latter's leakproofness is poor, can not suppress the interference and the influence of high chloride ion fully.
The purpose of this utility model is to provide a kind of being applicable to contain the closed digestion device that COD measures in high chloride ion concentration (greater than the 2000mg/l) waste water, this digestion device carries out the heating of timing temperature control by temperature control instrument and timer control electrical heating elements to digestion tube, heat mainly is to pass to digestion tube by air transmitted, this digestion tube adopts the sealing of leather cup formula sealing gasket, easy accessibility during test, and can reuse repeatedly.
The utility model is finished as follows.
Clear up stove and adopt Electric heating, electrical heating elements is controlled by temperature control instrument and timer, and digestion tube is carried out the heating of timing temperature control, and its setting value can require to change with sample testing.Digestion tube vertically is inserted in the heating tank sleeve pipe that electrical heating elements is housed.Selected required heating-up temperature, heat time heating time when the size of heating tank and the number of sleeve pipe can be measured according to the watt level of electrical heating elements and sample, generally when the power of electrical heating elements be that 0.5 kilowatt, heating-up temperature are 50～200 ℃, heat time heating time, the heating tank size can be chosen to be 250 * 230 * 130mm(length * wide * height when being 1～9 hour).Can balanced configuration 12 branch casings in this heating tank, 12 digestion tubes can carry out simultaneously during so each test.(be generally 2～3mm), make the heat that electrical heating elements distributed in the heating tank, the inwall by the heating tank sleeve pipe passes to digestion tube through air transmitted, thereby guarantees oxygenation efficiency correct in the digestion tube need to keep certain interval between heating tank sleeve pipe and the digestion tube.Temperature control instrument and timer can be selected suitable commercial approved product according to the scope of sample testing requirement, also can optionally be assembled into the warning device of hummer and so on.
Digestion tube is the cylindric test tube of being made by hard glass, and the bottom is the plane, external diameter 25mm, length 180mm, pipe thickness 1.5mm.The mouth of pipe flange of digestion tube circularizes the plane, annular external diameter 35mm, the thickness 4mm of the flange mouth of pipe.The planar annular of this flange mouth of pipe upper surface need carry out frosted to be handled, to strengthen sealing effectiveness.
By the leather cup formula sealing gasket that the polytetrafluoroethylmaterial material of not clearing up reaction is made, place this on the digestion tube mouth of pipe flange planar annular that frosted is handled.The upper and lower surface of this leather cup formula sealing gasket is the plane, and external diameter is identical with the planar annular external diameter of the flange mouth of pipe, thickness 5mm; Its lower end is the hollow cylindrical of external diameter 22mm, internal diameter 20mm, height 10mm.This leather cup formula sealing gasket has diameter on inner side plane be that 30mm, thickness are the circumferential groove of 2mm, and this groove raises in heating-up temperature, when the digestion tube internal pressure increases, can make the cup leather packing pad produce additional seal power, thereby reaches best sealing effectiveness.
The clamp nut that matches is up and down made by engineering plastics, and external diameter 46mm, thickness 22mm, thread engagement are M40 * 2, and periphery is made annular knurl and handled.Upward lower nut lays respectively at the planar annular place, below of leather cup formula sealing gasket plane, top and mouth of pipe flange.After on the lower end hollow cylinder for the treatment of leather cup formula sealing gasket is put in the lower surface plane contact of digestion tube, sealing gasket to the digestion tube mouth of pipe flange planar annular of handling through frosted, tighten and match clamp nut up and down, by this fastening force, make the cup leather packing pad produce plastic yield, thereby reach sealing purpose.
Accompanying drawing 1,2 has been showed an embodiment of the present utility model, wherein:
Accompanying drawing 1 is the synoptic diagram of digestion device;
Among the figure: the 1st, leather cup formula sealing gasket, the 2nd matches clamp nut, the 3rd up and down, digestion tube, the 4th, heating tank sleeve pipe, the 5th, heating tank, the 6th, heating element, the 7th, temperature control instrument, the 8th, timer.
Describe the operating process of this enclosure-type COD digestion device in detail below in conjunction with accompanying drawing.
When a certain waste water COD that contains high chloride ion of needs test
CrThe time, water sample to be measured and reagent can be injected digestion tube 3, injection rate IR is generally the about 20ml of 1/3(of digestion tube 3 internal volumes).Then leather cup formula sealing gasket 1 is placed on the digestion tube 3 flange mouth of pipe planar annulars that frosted is handled,, be inserted in the digestion tube 3, therefore can guarantee automatic centering, avoid the position of leather cup formula sealing gasket 1 crooked because its lower end is a hollow cylindrical.Again the clamp nut of pairing up and down 2 that is positioned at planar annular place, leather cup formula sealing gasket plane, 1 top and flange below is tightened.Firmly need balanced when tightening.Tightening to feel leather cup formula sealing gasket 1 produces till the plastic yield.For preventing to tighten the mouth of pipe flange of time damage digestion tube 3, can below the flange mouth of pipe, put the packing ring that a flexible material is made in the planar annular place.
Digestion tube 3 with sealing vertically is inserted in the heating tank sleeve pipe 4 that electrical heating elements 6 is housed then.Set the heating-up temperature of temperature control instrument 7 and the heat time heating time of timer 8.Start power switch, energized is installed on electrical heating elements 6 in the heating tank 5 and is promptly conducted heat by air by sleeve pipe 4 inwalls and digestion tube 3 is heated to design temperature promptly picks up counting.After waiting to reach heat time heating time, timer 8 actions, power supply cuts off automatically.To clear up digestion tube 3 cool to room temperature after the end, and open and match clamp nut 2 up and down, take out the liquid after clearing up.Carry out titration and calculating then according to a conventional method, obtain the COD of this waste water
CrMeasured value.Closed COD digestion device of the present utility model can suppress interference and influence that chlorion is measured COD, and particularly the COD mensuration for low COD high chloride ion waste water can be described as a kind of desirable tools for measurement.The closed COD digestion device that the utility model provides is compared with conventional COD digestion device, and it is easy, quick also to have a test, once can carry out the mensuration of 12 water samples simultaneously, energy savings, reduce testing expense, precision and accuracy height, and measured value is actual COD
CrNumerical value does not need row to proofread and correct again.
In addition, except to containing the high chloride ion concentration tailing water analysis, use the COD of the general waste water of this digestion device analysis
Cr, its precision and accuracy also all reach the relevant requirements in " water and the effluent monitoring analytical approach " that China national Environmental Protection Agency (EPA) issues.The waste water COD that can be widely used in environmental monitoring mechanism, waste water treatment mechanism and industrial and mining enterprises detects.
Adopt standard sample to prepare the water sample of different chloride ion contents, measure respectively with closed COD digestion device of the present utility model and conventional non-closed digestion device, the result is as shown in following two show, wherein the COD of the standard sample of table 1
CrBe 50mg/l, the COD of the standard sample of table 2
CrBe 500mg/l, this shows good effect of the present utility model.
Table 1:
| Chloride ion content mg/l | The airtight digestion device | Conventional digestion device | ||||
| Measured value | Difference | Relative error % | Measured value | Difference | Relative error % | |
| 3200 | 50.00 | 0 | 0 | 134.53 | 84.53 | 169.06 |
| 6000 | 49.95 | 0.05 | -0.1 | 158.45 | 108.45 | 216.90 |
| 8000 | 50.00 | 0 | - | 149.48 | 99.48 | 198.96 |
| 12000 | 49.90 | 0.10 | -0.2 | 140.51 | 90.51 | 181.02 |
| 20000 | 49.95 | 0.05 | -0.1 | 136.03 | 86.03 | 172.06 |
Table 2:
| Chloride ion content mg/l | The airtight digestion device | Conventional digestion device | ||||
| Measured value | Difference | Relative error % | Measured value | Difference | Relative error % | |
| 3200 | 508.8 | 8.8 | 1.76 | 524.51 | 24.52 | 4.90 |
| 6000 | 510.4 | 10.4 | 2.08 | 526.97 | 26.97 | 5.39 |
| 8000 | 510.4 | 10.4 | 2.08 | 529.42 | 29.42 | 5.88 |
| 12000 | 508.8 | 8.8 | 1.76 | 531.87 | 31.87 | 6.37 |
| 20000 | 508.8 | 8.8 | 1.76 | 537.75 | 37.75 | 7.55 |
Claims (3)
1, a kind of by digestion tube and clear up the closed COD digestion device that stove etc. is formed, the horminess glass tube mouth of pipe flange that it is characterized in that digestion tube, the upper surface frosted of flange, the sealing gasket of being made by the flexible material of not clearing up reaction places on this frosting, by being positioned at plane, sealing gasket top and being positioned at the fastening force of the pairing clamp nut at mouth of pipe flange lower, planar place, make sealing gasket produce plastic yield.
2,, it is characterized in that sealing gasket is a leather cup formula sealing gasket, and on the sealing gasket inner side plane, have circumferential groove according to the described closed COD digestion device of claim 1.
3,, it is characterized in that leather cup formula sealing gasket adopts the polytetrafluoroethylmaterial material of not clearing up reaction to make according to the described closed COD digestion device of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90215348 CN2074453U (en) | 1990-10-03 | 1990-10-03 | Enclosed cod suppressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90215348 CN2074453U (en) | 1990-10-03 | 1990-10-03 | Enclosed cod suppressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2074453U true CN2074453U (en) | 1991-04-03 |
Family
ID=4894645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90215348 Withdrawn CN2074453U (en) | 1990-10-03 | 1990-10-03 | Enclosed cod suppressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2074453U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634616B (en) * | 2008-07-25 | 2011-02-09 | 宝山钢铁股份有限公司 | Method and device for removing high chloride ions in wastewater COD on-line detection |
| CN104062171A (en) * | 2013-03-22 | 2014-09-24 | 北京瑞利分析仪器有限公司 | Miniature heating digestion device |
| CN109134922A (en) * | 2018-09-12 | 2019-01-04 | 盐城项远环保设备有限公司 | A kind of PET alcoholysis processing unit |
| CN112611724A (en) * | 2020-12-21 | 2021-04-06 | 丽水蓝城农科检测技术有限公司 | Laboratory is with clearing up constant volume colorimetric device |
| CN117123286A (en) * | 2023-09-01 | 2023-11-28 | 东海县浩远石英制品有限公司 | Sealed quartz digestion tube for measuring total nitrogen content of wastewater and preparation process thereof |
-
1990
- 1990-10-03 CN CN 90215348 patent/CN2074453U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634616B (en) * | 2008-07-25 | 2011-02-09 | 宝山钢铁股份有限公司 | Method and device for removing high chloride ions in wastewater COD on-line detection |
| CN104062171A (en) * | 2013-03-22 | 2014-09-24 | 北京瑞利分析仪器有限公司 | Miniature heating digestion device |
| CN109134922A (en) * | 2018-09-12 | 2019-01-04 | 盐城项远环保设备有限公司 | A kind of PET alcoholysis processing unit |
| CN112611724A (en) * | 2020-12-21 | 2021-04-06 | 丽水蓝城农科检测技术有限公司 | Laboratory is with clearing up constant volume colorimetric device |
| CN117123286A (en) * | 2023-09-01 | 2023-11-28 | 东海县浩远石英制品有限公司 | Sealed quartz digestion tube for measuring total nitrogen content of wastewater and preparation process thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |