A kind of air mix facilities that is used for online water analysis
Technical field
The present invention relates to a kind of air mix facilities, especially a kind of air mix facilities that is used for online water analysis.
Background technology
At present, online analytical instrument of water quality has been widely used in the constituent analysis in the pollution source discharging, and the composition of its analysis comprises COD (COD), ammonia nitrogen, total phosphorus, total nitrogen, heavy metal etc.Usually, because the fluctuation of water treatment effect can cause that the concentration of these compositions changes a lot,, need online analytical instrument of water quality to have a plurality of ranges, and have very big range ratio between the range for adapting to this variation.Wherein, dilution is exactly means that well realize the wide range ratio, and usually, dilution ratio is big more, just can realize big more range ratio.And existing dilution technology existence can't realize the problem of big dilution ratio, and also has shortcomings such as device volume is big, cost is high, the dilution ratio computational accuracy is low.
Summary of the invention
The technical matters that the present invention will solve provides the air mix facilities that is used for online water analysis that a kind of dilution ratio is big, cost is low, volume is little, precision is high.
For addressing the above problem, the technical scheme that the present invention adopts comprises water sample case, zero appearance case, it is characterized in that described air mix facilities also is provided with little gauge line, exhausted bath box, liquid testing device, metering pond, suction pump; The upper end of said little gauge line connects first passage; The lower end connects second channel, and an end of said first passage is provided with first valve, and first passage is connected with exhausted bath box through first valve; The first passage other end sets gradually liquid testing device, metering pond, suction pump; One end of said second channel is provided with second valve, and the other end is provided with the 3rd valve, and second channel is connected with water sample case, zero appearance case respectively through second valve, the 3rd valve.
The described air mix facilities that is used for online water analysis; It is characterized in that described air mix facilities also is provided with pedestal; Through pedestal little gauge line, first passage, second channel, third channel, four-way, five-way road are set; The corresponding connection of one side ports of going into, going out head piece and first passage, second channel, third channel, four-way, five-way road of said first valve, second valve, the 3rd valve, said exhausted bath box, water sample case, zero appearance case and the liquid testing device that sets gradually, metering pond, suction pump are through the opposite side port corresponding connection of flexible pipe with third channel, four-way, five-way road.
The described air mix facilities that is used for online water analysis is characterized in that described air mix facilities also has control device.
The described air mix facilities that is used for online water analysis is characterized in that described first valve, second valve, the 3rd valve are solenoid valve.
The described air mix facilities that is used for online water analysis is characterized in that being provided with sealing gasket between described first valve, second valve, the 3rd valve and first passage, the second channel.
The described air mix facilities that is used for online water analysis is characterized in that described metering pond is provided with containing mark.
Beneficial effect of the present invention:
1, dilution ratio is big, cost is low, volume is little, precision is high.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the structural representation of the embodiment of the invention 2.
Fig. 3, Fig. 4, Fig. 5 are principle of work synoptic diagram of the present invention.
Embodiment
Embodiment 1
As shown in Figure 1, air mix facilities of the present invention comprises water sample case 1, zero appearance case 2, little gauge line 3, exhausted bath box 4, liquid testing device 5, metering pond 6, suction pump 7, and the water sample case is used to deposit detected sample liquid; Zero appearance case is used to deposit dilution, and little gauge line 3 is little metering pipeline, and the upper end connects first passage 9; The lower end connects second channel 10, and the head piece of going into that an end of first passage 9 is provided with first valve, 11, the first valves 11 is connected with first passage 9; Going out family status is connected with exhausted bath box 4; First passage 9 other ends set gradually liquid testing device 5, metering pond 6, suction pump 7, and an end of second channel 10 is provided with second valve 12, and the other end is provided with the 3rd valve 13; The head piece of going into of second valve 12 is connected with water sample case 1; Go out head piece and be connected with the left side port of second channel 10, the head piece of going into of the 3rd valve 13 is connected with zero appearance case 2, goes out head piece and is connected with the right side port of second channel 10.
Be the capacity of water sample on the metering pond that can accurately and timely read and/or zero appearance, metering also is provided with containing mark on the pond; Safe and reliable for ease of what operate and install, valve adopts solenoid valve.
In addition, the present invention also comprises a control device 19, is used for the work of whole by-pass valve control, suction pump.
Principle of work:
Before the startup, first valve 11, second valve 12, the 3rd valve 13 all are in closed condition.
Open second valve 12, open suction pump 7, under the suction pump suction, the water sample in the water sample bucket 1 by the road 21, after being detected by detector of liquid 5, the suction pump stall.This moment, liquid resided in the pipeline, and is as shown in Figure 3.
Close second valve 12, open first valve 11, suction pump 7 counter-rotatings (in pipeline, blowing) are driven into waste liquid barrel 4 with the water sample that resides in the first passage 9, suction pump 7 stalls.The residue water sample resides in little gauge line 3 and the second channel 10, and is as shown in Figure 4.
Close first valve 11, open the 3rd valve 13, suction pump 7 is just being changeed; At this moment, the water sample in little gauge line 3 gets into metering pond 6 by the road, thereupon; Zero appearance in the zero appearance bucket also gets into metering pond 6 by the road, obtains the water sample dilution at last, sends into analytic system 22 by suction pump 7 again; Analyze, as shown in Figure 5.
Above-mentioned each link operation is accomplished through control device 19 automatically.
Adopt the computing formula of dilution ratio of the present invention to be: to suppose that it is that (suction pump has the ability of quantitative extraction liquid to the A milliliter that volume is extracted in suction pump; Extracting volume can obtain through observing metering tankage scale); The volume of little gauge line 3 is the B milliliter, and so, dilution ratio is: (A-B)/and B.In view of the volume B of little gauge line 3 can do very little, it is very big that dilution ratio also just can be done.Traditional relatively air mix facilities; This device does not need expensive flow measurement device, as long as just can accurately calculate dilution ratio through the volume of gauge line 3 and the volume in metering pond, does not need very big diluting tank yet; Through changing little gauge line 3 volumes, it is very little that the metering pond also can be done.
Embodiment 2
As shown in Figure 2; Further preferred version of the present invention; Also be provided with a pedestal 14; Be wholely set little gauge line 3, first passage 9, second channel 10, third channel 15, four-way 16, five-way road 17 through pedestal 14; The corresponding connection of one side ports of going into, going out head piece and first passage 9, second channel 10, third channel 15, four-way 16, five-way road 17 of said first valve 11, second valve 12, the 3rd valve 13, exhausted bath box 4, water sample case 1, zero appearance case 2 and the liquid testing device 5 that sets gradually, metering pond 6, suction pump 7 are through the opposite side port corresponding connection of flexible pipe 18 with third channel 15, four-way 16, five-way road 17.
The work of present embodiment is original identical with embodiment 1, and the improvement advantage of embodiment 1 is relatively: because general water sample has very strong corrosivity, can produce harmful effect to device; Each passage and pedestal are wholely set; Can increase the service life, each valve can be fixed on the pedestal 14 in addition, is convenient to Unit Installation and maintenance; Be connected with each passage, liquid case through flexible pipe, equally also make things convenient for the installation and the replacing of each accessory of device.