CN206132751U - Reduce device of high -salt -content wastewater chemical oxygen demand evaluated error - Google Patents
Reduce device of high -salt -content wastewater chemical oxygen demand evaluated error Download PDFInfo
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- CN206132751U CN206132751U CN201621127135.5U CN201621127135U CN206132751U CN 206132751 U CN206132751 U CN 206132751U CN 201621127135 U CN201621127135 U CN 201621127135U CN 206132751 U CN206132751 U CN 206132751U
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Abstract
High -salt -content wastewater chemical oxygen demand's survey has had the standard method of analysis, and in actual operation, the nitrogen purging velocity of flow and flow are heavy handled, the inhomogeneous and unstable direct influence of pipeline distribution measuring method's accuracy and repeatability. The utility model discloses a gas circuit system of multi -step pressure reduction reposition of redundant personnel and the homogeneity that purpose -made intubate triangular flask ensured the nitrogen gas flow prevent the solution suck -back, and tail gas adopts the two -stage drexel bottle of establishing ties to absorb, absorbs more thoroughly. This device is simply easy -to -use, can effectively reduce high -salt -content wastewater chemical oxygen demand's error.
Description
Technical field
This utility model is related to COD (ChemicalOxygenDemand, the COD) analysis field of water quality, especially
It is related to a kind of high slat-containing wastewater device for measuring chemical oxygen demand.
Background technology
High-chloride wastewater COD analyses are always a difficult point in Environmental Analytical Chemistry, need currently for high-chloride wastewater chemistry
The assay method of oxygen amount is existed with step《The measure chlorine correction method (HJ/T 70-2001) of chemical oxygen demand of high-chloride wastewater》(with
Lower abbreviation《High chlorine method》) middle detailed description.《High chlorine method》In to define nitrogen purging flow velocity be only 5～10mL/min, and source of the gas
The pressure of generation is larger, it is difficult to adjust.Even if at source outlet installing partial pressure valve to reduce pressure, cannot also ensure each isocon
Road flow velocity is evenly distributed, the unstable and distribution inhomogeneities of nitrogen flow, to the purging for producing chlorine in cannula taper bottle
Produce strong influence.Nitrogen purging is too fast, and tail gas absorption is incomplete, and purged slow, and chlorine cannot be blown out completely.Nitrogen is not
It is stable, the absorbing liquid or digestion solution suck-back in pipeline can be caused, and larger error is brought to measurement result.Additionally,《High chlorine
Method》In it is not detailed enough to the description of device for absorbing tail gas, provide only installation drawing, give expression to from figure and mean, with one
Similar to the acuminous pipe of band of pipet, absorb in insertion sodium hydroxide solution, the bubble that this mode is produced is larger, gas
Liquid mass-transfer efficiency is low, even if chlorine and sodium hydroxide reaction rate are quickly, if but control the purge flow rate of nitrogen well,
Chlorine still can have little time to absorb just excessive next, the impact COD results that shed.In a word, the distribution uniformity and pressure stability of nitrogen
It is right《High chlorine method》Repeatability and repeatability generate directly impact.
Utility model content
In order to solve problem above, this utility model provides a kind of dress for improving nitrogen distribution uniformity and stability
Put, realize reduction high slat-containing wastewater COD determination error.This utility model is by two-stage decompression tank and check valve
Flow-dividing control, is easier the regulation of nitrogen regulating QI flow, installs check valve, prevent molten in air inlet pipe and Drexel bottle absorption tube
Liquid suck-back.One bulb tube is set at the intubation of cannula taper bottle, and intubation outlet is adjusted to tip, prevents suck-back.
Tail gas absorption part is absorbed using two-stage Drexel bottle, improves chlorine in absorbing liquid absorption efficiency, final to reduce high-chloride wastewater chemistry
Oxygen demand chlorine correction method caused error because nitrogen purging is uneven and flow-control is difficult.
This utility model adopt solution be：A kind of dress for reducing high slat-containing wastewater COD determination error
Put, it is characterised in that including source of the gas 1, trachea, one-level decompression tank, second depressurized tank, COD digestion instruments, cannula taper bottle, one
Level Drexel bottle and two grades of Drexel bottles, concrete connected mode is：Source of the gas draw trachea successively with valve, air relief valve, pressure gauge and
The intake interface connection of one-level decompression tank, the outlet interface of one-level decompression tank pass sequentially through trachea and valve, air relief valve, pressure
The intake interface connection of table, second depressurized tank, the outlet interface of second depressurized tank again successively with valve, check valve, gas flow
Meter, COD digestion instruments be connected, the trachea drawn by COD digestion instruments be sequentially connected check valve, one-level Drexel bottle, two grades wash
Gas cylinder.
Described cannula taper bottle is made up of bend pipe, bulb tube, tip, and the bend pipe caliber is 6～12mm, described spherical
The volume of pipe is 100～400mm3, the tip aperture is 0.1～0.5 with the ratio of bend pipe diameter.
The bend pipe of the cannula taper bottle is located at the side of cannula taper bottle, and the height residing for bend pipe insertion body is taper
2/3rds of bottle total height, bend pipe extends to cannula taper bottle bottom of bottle drag, and with bottom surface at a distance of 1～3mm, end is point
Head, arranges a bulb tube at the 10mm of tip front end.
Outlet interface set by described one-level decompression tank and second depressurized tank is 3, also dependent on actual demand
To increase or decrease, to adjust gas circuit way.
One-level reduce pressure tank and second depressurized tank be profile be cylinder, material is politef, and one-level reduces pressure the pressure of tank
Power is 0.1～0.5 times of bleed pressure, and volume is 1～5L, second depressurized pressure tank be one-level reduce pressure pressure tank 0.05～
0.45, volume is 2～6L.
1 air relief valve, 1 valve and 1 pressure gauge are installed before each intake interface of one-level decompression tank.
The intake interface of each second depressurized tank installs 1 air relief valve, 1 valve and 1 pressure gauge, each outlet interface
Place is installed by 1 check valve.
Described trachea material is politef.
Tail gas absorption adopts one-level Drexel bottle and two grades of Drexel bottle series connection to absorb, and installs 1 at one-level Drexel bottle air inlet
The sodium hydroxide absorbing liquid volume filled in check valve, the one-level Drexel bottle and two grades of Drexel bottles is respectively 200mL.
Description of the drawings
Fig. 1 be the utility model proposes the intact device figure that is connected with high chlorine digestion instrument of gas path device.
Shown in figure：1- sources of the gas, 2- tracheas, 3- air relief valve, 4- pressure gauges, 5- one-levels decompression tank, 6- second depressurized tanks, 7-
Check valve, 8-COD digestion instruments, 9- one-level Drexel bottles, bis- grades of Drexel bottles of 10-, 11- intake interfaces, 12- outlet interfaces, 13- gas
Flowmeter body, 14- valves, 15- cannula taper bottles.
Fig. 2 is the enlarged drawing of 15- cannula taper bottles in Fig. 1
Shown in figure：16- bend pipes, 17- bulb tubes, 18- tips.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Specific embodiment
It is shown in Figure 1, the utility model proposes a kind of determine chlorine correction method for chemical oxygen demand of high-chloride wastewater
Air-channel system adjusts system, and its connected mode is as follows：Source of the gas 1 draw trachea 2 successively with valve 14, air relief valve 3, pressure gauge 4
Connect with one-level decompression canister incoming gas interface 11, the outlet interface 12 of one-level decompression tank 11 passes sequentially through trachea 2 with valve 14, decompression
Valve 3, pressure gauge 4, second depressurized canister incoming gas interface 11 connect, the outlet interface 12 of second depressurized tank 11 again successively with valve 14,
Check valve 7, gas flowmeter 13, COD digestion instruments 8 are connected, and are sequentially connected unidirectionally by the trachea 2 that COD digestion instruments 8 are drawn
Valve 7, one-level Drexel bottle 9, two grades of Drexel bottles 10.
Concrete operations mode and requirement are as follows：Nitrogen source gases are opened, the nitrogen of generation is subtracted into one-level by intake interface
Pressure tank, adjusts intake interface air relief valve and valve, and gauge pressure is maintained below 2MPa, and one-level decompression tank arranges three outlets and connects
Mouthful, the intake interface of second depressurized tank is connected to trachea, adjust respectively air relief valve at each second depressurized canister incoming gas mouth and
Valve, makes gauge pressure maintain below 0.2MPa, and each second depressurized tank arranges three outlet interfaces, each second depressurized tank outlet
Interface is connected to cannula taper bottle air inlet with trachea, adjusts the valve and gas flow of each second depressurized tank outlet interface
Meter, makes gas flow meet the requirement in analytical standard, enters one-level Drexel bottle, one-level gas washing from the tail gas of digestion instrument blowout
1 check valve is installed before bottle air inlet pipe prevents absorbing liquid suck-back, tail gas from connecting from outlet with trachea Jing after one-level Drexel bottle absorption
Second Drexel bottle.After clearing up end, each valve and gas flowmeter are adjusted respectively, make nitrogen flow meet disappearing for standard requirement
The flow of nitrogen needed for after solution.
In this utility model embodiment, trachea way is up to 9 tunnels, but is not only limited to this, can according to demand with this
The type of attachment of utility model more trachea pipelines in parallel or series.
Above-mentioned specific embodiment is used for illustrating this utility model, rather than this utility model is limited,
In spirit of the present utility model and scope of the claims, any modifications and changes made to this utility model all fall
Enter protection domain of the present utility model.
Claims (9)
1. it is a kind of reduce high slat-containing wastewater COD determination error device, it is characterised in that including source of the gas (1), trachea
(2), one-level decompression tank (5), second depressurized tank (6), COD digestion instruments (8), cannula taper bottle (15), one-level Drexel bottle (9) and
Two grades of Drexel bottles (10), concrete connected mode is：The trachea (2) that source of the gas (1) is drawn successively with valve (14), air relief valve (3), pressure
Intake interface (11) connection of power table (4) and one-level decompression tank (5), the outlet interface (12) of one-level decompression tank (5) are passed sequentially through
Trachea (2) is connected with the intake interface (11) of valve (14), air relief valve (3), pressure gauge (4), second depressurized tank, second depressurized tank
(6) outlet interface (12) is connected with valve (14), check valve (7), gas flowmeter (13), COD digestion instruments (8) again successively
Connect, check valve (7), one-level Drexel bottle (9), two grades of Drexel bottles are sequentially connected by the trachea (2) that COD digestion instruments (8) are drawn
(10)。
2. a kind of device for reducing high slat-containing wastewater COD determination error according to claim 1, its feature exists
In, the cannula taper bottle (15) is made up of bend pipe (16), bulb tube (17), tip (18), bend pipe (16) caliber be 6～
12mm, the volume of the bulb tube (17) is 100～400mm3, tip (18) aperture is 0.1 with the ratio of bend pipe diameter
～0.5.
3. a kind of device for reducing high slat-containing wastewater COD determination error according to claim 1, its feature exists
In the bend pipe of the cannula taper bottle (15) is located at the side of cannula taper bottle (15), and the height residing for bend pipe insertion body is
2/3rds of conical flask total height, bend pipe extend to cannula taper bottle (15) bottom of bottle drag, with bottom surface at a distance of 1～3mm,
End is tip (18), and a bulb tube (17) is arranged at the 10mm of tip front end.
4. a kind of device for reducing high slat-containing wastewater COD determination error according to claim 1, its feature exists
In the outlet interface set by one-level decompression tank (5) and second depressurized tank (6) is 3, increases also dependent on actual demand
Or reduce, to adjust gas circuit way.
5. a kind of device for reducing high slat-containing wastewater COD determination error according to claim 1, its feature exists
It is cylinder for profile in, one-level decompression tank (5) and second depressurized tank (6), material is politef, one-level reduces pressure tank (5)
Pressure be 0.1～0.5 times of bleed pressure, volume is 1～5L, and second depressurized tank (6) pressure is that one-level reduces pressure tank (5) pressure
0.05～0.45, volume be 2～6L.
6. a kind of device for reducing high slat-containing wastewater COD determination error according to claim 1, its feature exists
1 air relief valve (3), 1 valve (14), and 1 pressure gauge (4) are installed before each intake interface of, one-level decompression tank (5).
7. a kind of device for reducing high slat-containing wastewater COD determination error according to claim 1, its feature exists
In, the intake interface of each second depressurized tank (6) installs 1 air relief valve (3), 1 valve (14) and 1 pressure gauge (4), each
Outlet seam installs 1 check valve (7).
8. a kind of device for reducing high slat-containing wastewater COD determination error according to claim 1, its feature exists
In trachea (2) material is politef.
9. a kind of device for reducing high slat-containing wastewater COD determination error according to claim 1, its feature exists
In tail gas absorption adopts one-level Drexel bottle (9) and two grades of Drexel bottle (10) series connection to absorb, and pacifies at one-level Drexel bottle (9) air inlet
1 check valve (7) is filled, the sodium hydroxide absorbing liquid volume filled in the one-level Drexel bottle (9) and two grades of Drexel bottles (10) is each
For 200mL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621127135.5U CN206132751U (en) | 2016-10-17 | 2016-10-17 | Reduce device of high -salt -content wastewater chemical oxygen demand evaluated error |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621127135.5U CN206132751U (en) | 2016-10-17 | 2016-10-17 | Reduce device of high -salt -content wastewater chemical oxygen demand evaluated error |
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|---|---|
| CN206132751U true CN206132751U (en) | 2017-04-26 |
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ID=58574205
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621127135.5U Expired - Fee Related CN206132751U (en) | 2016-10-17 | 2016-10-17 | Reduce device of high -salt -content wastewater chemical oxygen demand evaluated error |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442911A (en) * | 2016-10-17 | 2017-02-22 | 浙江大学苏州工业技术研究院 | Device for reducing measurement error of chemical oxygen demand of high brine waste water |
| CN109752481A (en) * | 2019-03-07 | 2019-05-14 | 安徽创新检测技术有限公司 | A kind of water quality bichromate measuring method |
| CN111537325A (en) * | 2020-06-17 | 2020-08-14 | 中检(河南)计量检测有限公司 | Calibration method of water bath nitrogen blowing instrument |
-
2016
- 2016-10-17 CN CN201621127135.5U patent/CN206132751U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442911A (en) * | 2016-10-17 | 2017-02-22 | 浙江大学苏州工业技术研究院 | Device for reducing measurement error of chemical oxygen demand of high brine waste water |
| CN109752481A (en) * | 2019-03-07 | 2019-05-14 | 安徽创新检测技术有限公司 | A kind of water quality bichromate measuring method |
| CN111537325A (en) * | 2020-06-17 | 2020-08-14 | 中检(河南)计量检测有限公司 | Calibration method of water bath nitrogen blowing instrument |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170426 Termination date: 20201017 |