CN112816267A - Collection and measuring device for anaerobic stabilization sludge release VSCs gas - Google Patents
Collection and measuring device for anaerobic stabilization sludge release VSCs gas Download PDFInfo
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- CN112816267A CN112816267A CN202110104161.5A CN202110104161A CN112816267A CN 112816267 A CN112816267 A CN 112816267A CN 202110104161 A CN202110104161 A CN 202110104161A CN 112816267 A CN112816267 A CN 112816267A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2294—Sampling soil gases or the like
Abstract
A collecting and measuring device for anaerobic stabilized sludge to release VSCs gas relates to the technical field of sludge biological treatment. The device comprises a box body system and a gas collecting and measuring system. The top of the box body is provided with a first guide pipe, a second guide pipe, a third guide pipe, a fan and a temperature sensing probe, one end of the first guide pipe, one end of the second guide pipe and one end of the third guide pipe are communicated with the inner cavity of the box body, and the other end of the first guide pipe, the second guide pipe and the third guide pipe are respectively communicated with a gas carrying tank or a Suma tank, a portable high-precision hydrogen sulfide detector and a gas buffering. The first guide pipe, the second guide pipe and the third guide pipe are respectively provided with a first valve, a second valve and a third valve, and the bottom of the box body is provided with a sampling port. The invention provides a collecting and measuring device for VSCs gas released by anaerobic stabilized sludge, which combines a box body system and a gas collecting and measuring system, so that the discharge rate and discharge amount of the VSCs gas released by the anaerobic stabilized sludge and the daily change condition are measured more accurately.
Description
Technical Field
The invention relates to the technical field of sludge biological treatment, in particular to a device for collecting and measuring VSCs (volatile sulfide) gas released by anaerobic stabilized sludge.
Background
With the advance of the urbanization process of China, the urban sewage treatment rate of China is improved year by year, and the sludge yield is also increased sharply. The sludge of the urban sewage treatment plant not only has high water content and is easy to decay, but also has strong odor, and malodorous gas generated by the sludge can cause serious damage to the ecological environment and simultaneously limit the treatment and resource utilization of the sludge. At present, sludge treatment modes of national urban sewage treatment plants are different, about only 10% of sludge is treated by technologies such as composting and fertilizer making and then recycled to the land, about 20% of sludge is treated by ways such as landfill, incineration and building material utilization, and the rest most of sludge is transported outside randomly and is simply buried or stacked.
Although most of malodorous gases generated by sludge contain a lot of components, most of gases are not carcinogenic, but the malodorous gases can cause adverse effects on people after being exposed to the malodorous environment for a long time, easily cause symptoms such as headache, dizziness, inattention and the like, can cause discomfort in physiology and sense organs of people, and can cause serious damage to the local ecological environment. VSCs have a low olfactory threshold and an unpleasant olfactory characteristic and are the major odorant in anaerobically stabilized sludge. Typical VSCs include: hydrogen sulfide (H)2S), methyl Mercaptan (MT), methyl sulfide (DMS) and dimethyl disulfide (DMDS). Determining whether and when the VSCs are to be discharged from the anaerobically stabilized sludge and knowing the discharge amount and discharge rate of the anaerobically stabilized sludge VSCs are of great significance to the disposal and utilization of the sludge.
The research of prior art to sewage treatment plant anaerobism stable sludge production foul gas is less relatively, and collection and measurement to anaerobism stable sludge release VSCs gas generally directly use the sampling bag to collect gas, then adopt the instrument to measure, adopt this kind of mode to cause the measured data error great easily, unable accurate understanding anaerobism stable sludge VSCs's discharge rate and emission and daily change condition.
Disclosure of Invention
The invention mainly aims to provide a collecting and measuring device for VSCs gas released by anaerobic stabilized sludge, which aims to solve the existing problems.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a gaseous collection and measuring device of sludge release VSCs is stabilized to anaerobism, includes the box, the box top sets up first pipe, second pipe, third pipe, first pipe, second pipe, third pipe one end intercommunication the inner chamber of box, first pipe other end intercommunication year gas pitcher or suma jar, second pipe other end intercommunication detector, the gaseous buffering sampling bag of third pipe other end intercommunication, set up first valve, second valve, third valve on first pipe, second pipe, the third pipe respectively, the bottom half sets up the sample connection, the inner chamber of box is equipped with the fan.
Furthermore, the side wall of the box body is provided with a heat-insulating interlayer, and the heat-insulating interlayer is provided with a circulating water inlet and a circulating water outlet.
Furthermore, the temperature control device is communicated with the circulating water inlet and the circulating water outlet through pipelines, and the pipelines are provided with circulating water pumps.
Further, a first PTFE pipe is arranged between the first guide pipe and the gas carrying tank or the Suma tank, a flow controller is arranged between the first PTFE pipe and the gas carrying tank, a second PTFE pipe is arranged between the second guide pipe and the detector, and a third PTFE pipe is arranged between the third guide pipe and the gas buffering sampling bag.
The invention provides a collecting and measuring device for VSCs gas released by anaerobic stabilized sludge, which has the following advantages compared with the prior art:
1. the fan is arranged at the upper part of the inner cavity of the box body, so that the gas in the box body is fully and uniformly mixed, and the accuracy of measuring the concentration of the VSCs gas is improved;
2. the temperature control system is arranged, so that the temperature of the box body can be adjusted, the influence of the temperature on the gas discharge rate in the collection process is avoided, and the rule that the aged and stable sludge releases the VSCs gas at a specific temperature is conveniently researched;
3. arranging a gas carrying tank and a flow controller, purging the tank body before collecting the VSCs each time, removing the accumulated VSCs gas in the tank body, and conveniently determining whether and when the VSCs are discharged from the stable sludge, so that the discharge rate and discharge amount of the VSCs in the anaerobic stable sludge and the daily change condition are accurately measured;
4. VSCs gas is collected by adopting the Suma tank, so that mutual transformation and adsorption of the VSCs can be avoided, and the detection accuracy is ensured;
5. h pair by utilizing portable high-precision hydrogen sulfide detector2S carries out in-situ measurement, is more convenient and faster, and can avoid H2The detection difficulty caused by large concentration difference and wide variation range of S and VOSCs (volatile organic sulfide).
Drawings
FIG. 1 is a schematic view of the structure of the present invention
The device comprises a box body 1, a fan 2, a first guide pipe 3, a second guide pipe 4, a third guide pipe 5, a first valve 6, a second valve 7, a third valve 8, a sampling port 9, a temperature-sensing probe 10, a heat-insulating interlayer 11, a circulating water inlet 12, a circulating water outlet 13, a circulating water pump 14, a water bath temperature control device 15, a gas carrier tank 16, a flow controller 17, a first PTFE (Polytetrafluoroethylene) pipe 18, a second PTFE pipe 19, a third PTFE pipe 20, a gas buffer sampling bag 21, a Suma tank 22 and a portable high-precision hydrogen sulfide detector 23.
Detailed description of the preferred embodiments
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Example 1
The device for collecting and measuring the gas of the anaerobic stabilized sludge released VSCs comprises a box body system and a gas collecting and measuring system. The box system comprises a box body 1, a fan 2, a first conduit 3, a second conduit 4, a third conduit 5, a first valve 6, a second valve 7, a third valve 8, a sampling port 9, a temperature sensing probe 10, a heat-preservation interlayer 11, a circulating water inlet 12, a circulating water outlet 13, a circulating water pump 14 and a water bath temperature control device 15; the gas collection system comprises a carrier gas tank 16, a flow controller 17, a first PTFE tube 18, a second PTFE19, a third PTFE tube 20, a gas buffer sampling bag 21, a suma tank 22 and a portable high-precision hydrogen sulfide detector 23.
In this embodiment, the detector is a portable high-precision hydrogen sulfide detector 23, the top of the box body 1 is provided with a first conduit 3, a second conduit 4, a third conduit 5 and a fan 2, one end of the first conduit 3, the second conduit 4 and one end of the third conduit 5 are communicated with the inner cavity of the box body 1, the other end of the first conduit 3 is communicated with a gas carrier 16 or a suma jar 22, the other end of the second conduit 4 is communicated with the portable high-precision hydrogen sulfide detector 23, the other end of the third conduit 5 is communicated with a gas buffer sampling bag 21, the first conduit 3, the second conduit 4 and the third conduit 5 are respectively provided with a first valve 6, a second valve 7 and a third valve 8, the fan 2 is arranged at the top of the inner cavity of the box body 1, during testing, gas in the box body is fully and uniformly mixed, the bottom of the box body 1 is provided with a sampling port 9, so that mud can be conveniently taken out. The first conduit 3, the second conduit 4 and the third conduit 5 are all made of stainless steel materials, the first valve 6, the second valve 7 and the third valve 8 are all made of PTFE (polytetrafluoroethylene) materials, and PTFE has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, so that the valves can work for a long time under the environment of various gases generated by sludge. The coating inside the suma tank 22 is subjected to silanization inert treatment, and when VSCs gas is collected, mutual conversion and adsorption caused by high chemical reaction activity of the VSCs can be avoided.
A first PTFE tube 18 is arranged between the first conduit 3 and the gas carrier 16 or the Suma tank 22, a flow controller 17 is arranged between the first PTFE tube 18 and the gas carrier 16, a second PTFE tube 19 is arranged between the second conduit 4 and the detector, a third PTFE tube 20 is arranged between the third conduit 5 and the gas buffer sampling bag 21, the detector is a portable high-precision hydrogen sulfide detector 23, and the generated H can be detected2S gas is monitored on line, and measurement is more convenient and faster.
The side wall of the box body 1 is provided with a heat preservation interlayer 11, and the heat preservation interlayer 11 is provided with a circulating water inlet 12 and a circulating water outlet 13. The invention also comprises a temperature control system, wherein the temperature control system comprises a temperature sensing probe 10, a water bath temperature control device 15 and a circulating water pump 14; the temperature-sensing probe 10 is arranged at the top of the box body 1, is communicated with the inner cavity of the box body 1 and is used for measuring the temperature of the inner cavity of the box body 1, the water bath temperature control device 15 is used for heating or cooling circulating water in the heat-preservation interlayer 11 and can display the temperature of the inner cavity of the box body 1 measured by the temperature-sensing probe 10, and the water bath temperature control device 15 is communicated with the circulating water inlet 12, the circulating water outlet 13 and the circulating water pump 14 through pipelines. Set up temperature control system, can adjust the box temperature to avoid the influence of collection in-process temperature to gas discharge rate, conveniently explore the gaseous law of ageing stable mud release VSCs under the specific temperature.
The operation method of the collecting and measuring device for the VSCs gas released by the anaerobic stabilized sludge is divided into two stages, including a gas stripping stage and a gas collecting stage.
1. Stripping stage
The sludge is blown off before the gas is collected.
The first PTFE pipe 18 is connected with the carrier gas tank 16, the second PTFE pipe 19 is not connected with any device, the third valve 8 is closed, the first valve 6 and the second valve 7 are opened, the flow is regulated to be 5L/min through the flow controller 17, and the sludge in the box body 1 is blown off for 30 min.
2. Gas collection stage
(1) Connecting a first PTFE tube 18 with a Suma tank 22, and connecting a second PTFE tube 19 with a portable high-precision hydrogen sulfide detector 23;
(2) the power supply is switched on, the fan 2 is automatically started, the temperature control system is started to regulate and control the temperature, and the stability of the system temperature in the collection stage is kept;
(3) opening a third valve 8, closing a first valve 6 and a second valve 7, filling the 5L gas buffer sampling bag 21 with the VSCs gas, and recording the accumulated time t;
(4) after the gas buffering sampling bag 21 finishes the accumulation of the VSCs, the first valve 6 and the second valve 7 are opened, the Suma tank 22 is opened, the portable high-precision hydrogen sulfide detector 23 is started, and H is measured in an in-situ measurement mode2S, avoidance of H2S and VOSCs (volatile)Volatile organic sulfides) are difficult to detect due to large concentration difference and wide variation range, the VSCs are collected in a 3.2L Suma tank 22, and then the VOSCs are detected by a pre-concentration-gas chromatography method;
(5) taking out a certain amount of sludge from the sampling port 9, measuring and recording the sludge quality, the sludge dry weight and the like;
(6) the aged stabilized sludge was purged and VSCs gas collection and detection were performed daily for a fixed period of time.
The calculation method of the gas discharge rate of the sludge VSCs is as follows:
e: discharge rate of VSCs gas in sludge
C: measured concentration of each of the VSCs,. mu.g/m3
V: volume sum, m, of the box body 1 and the gas buffer sampling bag 213
m: dry weight of stacked sludge%
t: cumulative time min for the gas buffer sampling bag 21 to be filled
The invention can collect the VSCs released by anaerobic stabilized sludge of a sewage treatment plant and accurately measure the discharge amount, discharge rate and daily change condition of the VSCs.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (4)
1. The utility model provides a gaseous collection and measuring device of sludge release VSCs is stabilized to anaerobism, a serial communication port, the power distribution box comprises a box body, the box top sets up first pipe, second pipe, third pipe, first pipe, second pipe, third pipe one end intercommunication the inner chamber of box, first pipe other end intercommunication year gas pitcher or suma jar, second pipe other end intercommunication detector, the gaseous buffering sampling bag of third pipe other end intercommunication, set up first valve, second valve, third valve on first pipe, second pipe, the third pipe respectively, the bottom half sets up the sample connection, the inner chamber of box is equipped with the fan.
2. The device for collecting and measuring the gas of the anaerobic stabilized sludge release VSCs according to claim 1, wherein the side wall of the box body is provided with a heat preservation interlayer, and the heat preservation interlayer is provided with a circulating water inlet and a circulating water outlet.
3. The device for collecting and measuring anaerobic stabilized sludge release VSCs gas according to claim 2, further comprising a temperature-sensitive probe disposed in the inner cavity of the tank, wherein the temperature-sensitive probe is connected to a water bath temperature control device for heating or cooling the circulating water in the heat-insulating interlayer, the water bath temperature control device is connected to the circulating water inlet and the circulating water outlet through a pipeline, and the pipeline is provided with a circulating water pump.
4. The device for collecting and measuring anaerobically stabilized sludge release VSCs gases as claimed in claim 1, wherein a first PTFE tube is disposed between the first conduit and the carrier gas tank or suma tank, a flow controller is disposed between the first PTFE tube and the carrier gas tank, a second PTFE tube is disposed between the second conduit and the detector, and a third PTFE tube is disposed between the third conduit and the gas buffer sampling bag.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114166969A (en) * | 2021-11-30 | 2022-03-11 | 西安科技大学 | Reaction device for simulating microorganisms to metabolize combustible gas in coal and test method thereof |
| CN114314868A (en) * | 2022-01-06 | 2022-04-12 | 北京工业大学 | Real-time collecting device and method for VSCs gas released from aeration dynamic water surface |
| CN114544267A (en) * | 2022-02-15 | 2022-05-27 | 河北中烟工业有限责任公司 | Volatile gas generation detection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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