CN210665375U - Device for detecting concentration of droplets in tail gas generated in diammonium phosphate production - Google Patents
Device for detecting concentration of droplets in tail gas generated in diammonium phosphate production Download PDFInfo
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- CN210665375U CN210665375U CN201921399964.2U CN201921399964U CN210665375U CN 210665375 U CN210665375 U CN 210665375U CN 201921399964 U CN201921399964 U CN 201921399964U CN 210665375 U CN210665375 U CN 210665375U
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Abstract
The utility model discloses a diammonium phosphate production tail gas droplet concentration detection device, include: fog droplet sampling bottle, stainless steel sleeve, temperature probe, stainless steel static and dynamic pressure connecting pipe, sampling gun pipe, fog droplet sampling connecting pipe, signal line, pressure connecting pipe, comdenstion water receiving flask, drying bottle, full-automatic dynamic pressure balance sampling pump. The outlet rubber plug of the fog drop sampling bottle is connected with the stainless steel sleeve, the fog drop sampling bottle is fixed on the sampling gun, and then the fog drop sampling bottle is connected with the condensed water collecting bottle, the drying bottle and the full-automatic dynamic pressure balance sampling pump through the fog drop sampling connecting pipe. The pressure connecting pipe is divided into dynamic and static pressure connecting pipes which are respectively connected with dynamic and static pressure interfaces of the full-automatic dynamic pressure balance sampling pump. The temperature probe transmits a temperature signal to the full-automatic dynamic pressure balance sampling pump through a signal wire. The utility model discloses a snakelike glass pipe, psammitolite filter plate two-stage trap can gather the droplet of whole particle diameters in the tail gas, and the sampling result is truer and more reliable.
Description
Technical Field
The utility model relates to a measure, the test, concretely relates to diammonium phosphate production tail gas droplet concentration detection.
Background
The diammonium phosphate device is designed to adopt a cyclone dust collector and a wet spraying and washing process to treat dust, ammonia and fluorine in tail gas. The scrubber nozzle atomizes to generate a large amount of fine fog drops with different particle sizes, the fine fog drops are easily carried by tail gas and enter the atmosphere, and the fog drops not only contain water, but also dissolve a large amount of soluble salts, such as: ammonium phosphate salts, calcium magnesium phosphate salts, sulfates, fluorides, and the like. In the tail gas dust concentration detection process, the fog drops containing soluble salt are captured by the sampling filter cylinder, the soluble salt is separated out after the filter cylinder is dried, the dust concentration in the tail gas is counted, the dust content exceeds the standard, and meanwhile, the salt compounds can form fine particle pollutants after entering the atmosphere, so that the atmosphere is polluted. Therefore, a demister is required to be arranged at the outlet of the spray scrubber to remove mist drops carried in the tail gas. The design selection and the performance examination of the demister mostly need to depend on accurate fog drop concentration detection data.
At present, the detection of the concentration of the droplets in the tail gas of a diammonium phosphate device has no relevant standard. The existing performance test method for coal-fired flue gas desulfurization equipment (GB/T21508-2008) in China provides a method for detecting the concentration of liquid drops at the outlet of a desulfurizing tower. The method can only collect fog drops with a particle size larger than a certain value, and can not collect fog drops with a small particle size and can not collect all fog drops in the smoke. Dynamic pressure balance type constant-speed continuous sampling cannot be realized, when the production working condition of the system changes, the flow rate of flue gas changes, the sampling system cannot correct the sampling flow in time according to the change of the working condition, continuous constant-speed sampling cannot be realized, meanwhile, a sampling nozzle cannot be replaced, constant-speed sampling can be achieved only by adjusting the sampling flow, and the adjusting range is poor. Mg in washing liquid of diammonium phosphate device2+The concentration fluctuation is large, and Mg can not be used in a diammonium phosphate device2+The concentration is corrected.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a diammonium phosphate device tail gas droplet concentration detection device that sampling error is little, and is easy and simple to handle.
The utility model provides a technical scheme: a diammonium phosphate device tail gas droplet concentration detection device includes: fog droplet sampling bottle, stainless steel sleeve, temperature probe, stainless steel static and dynamic pressure connecting pipe, sampling gun pipe, fog droplet sampling connecting pipe, signal line, pressure connecting pipe, comdenstion water receiving flask, drying bottle, full-automatic dynamic pressure balance sampling pump.
The fog drop sampling bottle comprises a fog drop collecting bottle, a snakelike glass tube, a glass funnel, a sand core filter plate, a sampling nozzle and a rubber plug; connect the intake pipe on fog drip receiving flask upper portion, sampling mouth and intake-tube connection, snakelike glass pipe is located the fog drip receiving flask, and one end and intake-tube connection even have glass funnel in snakelike glass pipe bottom, and the psammitolite filter plate is equipped with to the flare opening, are connected the sampling outlet duct on fog drip receiving flask upper portion and the relative direction of intake pipe, and the cover has the rubber buffer on the outlet duct, the rubber buffer links to each other with stainless steel sleeve, fixes fog drip sampling bottle on the sampling rifle, then is connected with comdenstion water receiving flask, drying bottle, full-automatic dynamic pressure balance sampling pump through fog drip sampling connecting pipe.
The pressure connecting pipe is divided into dynamic and static pressure connecting pipes which are respectively connected with dynamic and static pressure interfaces of the full-automatic dynamic pressure balance sampling pump.
The temperature probe transmits a temperature signal to the full-automatic dynamic pressure balance sampling pump through a signal wire.
The pressure induction port of the stainless steel dynamic and static pressure connecting pipe is parallel to the sampling nozzle of the fog drop sampling bottle, and the direction of the dynamic pressure induction port is the same as that of the sampling nozzle.
The utility model discloses a detection method obtains the weight of gathering the liquid drop through weighing, then corrects through the NH4+ concentration of gathering liquid drop and scrubbing tower washing liquid, deducts the influence of flue comdenstion water, obtains the fog drop content in the flue gas. The detection steps are as follows:
(1) before sampling, the sampling bottle is washed clean by deionized water, dried to constant weight, and placed into a drying vessel for later use after cooling.
(2) And connecting the fog drop sampling bottle with a stainless steel sleeve of a sampling gun, so that the fog drop sampling bottle is fixed on the sampling gun barrel.
(3) And the fog drop sampling connecting pipe is used for connecting the sampling gun, the condensate water collecting bottle, the drying bottle and the full-automatic dynamic pressure balance sampling pump.
(4) And the dynamic and static pressure interfaces of the sampling gun are respectively connected with the dynamic and static pressure interfaces of the full-automatic dynamic pressure balance sampling pump by a pressure connecting pipe. And connecting the temperature signal wire with a full-automatic dynamic pressure balance sampling pump.
(5) Through predicting the tail gas flow rate, selecting a proper sampling nozzle, inputting the caliber of the sampling nozzle, the shape and the caliber of a flue into a full-automatic dynamic pressure balance sampling pump, and setting sampling time.
(6) And inserting the sampling gun with the fixed fog drop sampling bottle into the flue, starting the full-automatic dynamic pressure balance sampling pump, and sampling the fog drops in the tail gas at constant speed.
(7) And after sampling is finished, recording the volume of the sampling tail gas, and weighing the weight of the collected liquid in the fog drop sampling bottle.
(8) Analysis of NH in washing and sampling solutions4 +And (4) concentration.
(9) Using formulas
And calculating to obtain the concentration of the fog drops in the tail gas.
In the formula: c-concentration of droplets, mg/m3。
m1-weight of the sampled fog drop sample bottle, g.
m2-weight of the sampled fog drop sample bottle, g.
V-volume of sampled exhaust gas, m3。
Compared with the prior art, the utility model, have following advantage: (1) the utility model disclosesThe device for detecting the concentration of the fog drops in the tail gas of the diammonium phosphate device can collect the fog drops with all particle sizes in the tail gas through the two-stage trap of the snake-shaped glass tube and the sand core filter plate, and the sampling result is more real and reliable. (2) The invention adopts dynamic pressure balance constant speed sampling, automatically adjusts the sampling speed in time according to the change condition of the tail gas flow speed, the sampling speed is always equal to the tail gas flow speed, and the sampling deviation caused by the fluctuation of the production working condition is eliminated. (3) By using NH in the invention4 +Correcting the concentration and deducting the influence of condensed water.
Drawings
FIG. 1 is a schematic view of the apparatus assembly of the present invention;
fig. 2 is a schematic structural view of a droplet sampling bottle of the present invention;
fig. 3 is a partial enlarged view of the pressure sensing port of the stainless steel hybrid connecting pipe of the present invention.
In the figure: 1-fog drip collecting bottle; 2-a serpentine glass tube; 3-a funnel; 4-sand core filter plate; 5-plastic elbow; 6-sampling mouth; 7-an air inlet pipe; 8-rubber plug; 9-rubber plug; 10-stainless steel sleeve; 11-temperature probe; 12-stainless steel dynamic and static pressure connecting pipes; 13-sampling barrel; 14-a droplet sampling connecting pipe; 15-signal lines; 16-pressure connection pipe; 17-a condensate collection bottle; 18-drying the bottle; 19-full automatic dynamic pressure balance sampling pump; 20-dynamic pressure induction port; 21-static pressure induction port.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A diammonium phosphate device tail gas droplet concentration detection device includes: the device comprises a fog drop sampling bottle, a stainless steel sleeve 10, a temperature probe 11, a stainless steel dynamic and static pressure connecting pipe 12, a sampling gun pipe 13, a fog drop sampling connecting pipe 14, a signal line 15, a pressure connecting pipe 16, a condensed water collecting bottle 17, a drying bottle 18 and a full-automatic dynamic pressure balance sampling pump 19.
The fog drop sampling bottle comprises a fog drop collecting bottle 1, a snakelike glass tube 2, a glass funnel 3, a sand core filter plate 4, a sampling nozzle 6 and a rubber plug 8; connect intake pipe 7 on 1 upper portion of fog drip receiving flask, sampling mouth 6 passes through plastics return bend 5 and is connected with intake pipe 7, and snakelike glass pipe 2 is located fog drip receiving flask 1, and one end is connected with intake pipe 7, even has glass funnel 3 in snakelike glass pipe 2 bottoms, and the funnel mouth is equipped with psammitolite filter plate 4, is connected sampling outlet duct 9 in the relative direction of 1 upper portion of fog drip receiving flask and intake pipe, and the cover has rubber buffer 8 on outlet duct 9, rubber buffer 8 links to each other with stainless steel sleeve 10, fixes fog drip sampling flask 1 on sampling gun barrel 13, then is connected with comdenstion water receiving flask 17, drying bottle 18, full-automatic dynamic pressure balance sampling pump 19 in proper order through fog drip sampling connecting pipe 14.
The pressure induction port of the stainless steel dynamic and static pressure connecting pipe 12 is parallel to the sampling nozzle 6 of the fog drop sampling bottle, the orientation of the dynamic pressure induction port is the same as that of the sampling nozzle, and the dynamic and static pressure connecting pipe is respectively connected with the dynamic and static pressure interface of the full-automatic dynamic pressure balance sampling pump 19. The temperature probe 11 transmits the temperature signal to a full-automatic dynamic pressure balance sampling pump 19 through a signal line 15.
The tail gas containing the fog drops enters a fog drop collecting bottle 1 through a sampling nozzle 6 at a certain speed, the sampling nozzle 6 is connected with an air inlet pipe 7 through a plastic elbow 5, the sampling nozzle 6 can be freely and rotatably adjusted to adapt to sampling in different tail gas flow directions, after the tail gas carrying the fog drops enters the sampling bottle, the fog drops with large particle sizes are attached to the inner wall of a snake-shaped glass tube 2 under the action of gravity and centrifugal force to form liquid drops, the liquid drops flow to the fog drop collecting bottle 1 along the glass tube and form a layer of liquid film on a sand core filter plate 4, after the fog drops with small particle sizes enter a funnel 3 along with the tail gas, the flow rate of the tail gas is reduced, and meanwhile, after the tail gas passes through the sand core filter plate 4, the fog drops with the whole particle sizes in the tail gas are completely captured by the sand. The fog drops in the tail gas enter a sampling gun pipe 13 from an air outlet pipe 9 after being captured, condensed water is collected in a condensed water collecting bottle 17, dried by a drying bottle 18 and finally discharged by a full-automatic dynamic pressure balance sampling pump 19.
Claims (3)
1. The utility model provides a diammonium phosphate device tail gas droplet concentration detection device which characterized in that the device includes: the device comprises a fog drop sampling bottle, a stainless steel sleeve (10), a temperature probe (11), a stainless steel dynamic and static pressure connecting pipe (12), a sampling gun pipe (13), a fog drop sampling connecting pipe (14), a signal wire (15), a pressure connecting pipe (16), a condensed water collecting bottle (17), a drying bottle (18) and a full-automatic dynamic pressure balance sampling pump (19);
the fog drop sampling bottle comprises a fog drop collecting bottle (1), a snakelike glass tube (2), a glass funnel (3), a sand core filter plate (4), a sampling nozzle (6) and a rubber plug (8); the device comprises a fog drop collecting bottle (1), an air inlet pipe (7) is connected to the upper portion of the fog drop collecting bottle (1), a sampling nozzle (6) is connected with the air inlet pipe (7), a snake-shaped glass tube (2) is located in the fog drop collecting bottle (1), one end of the snake-shaped glass tube is connected with the air inlet pipe (7), a glass funnel (3) is connected to the bottom of the snake-shaped glass tube (2), a sand core filter plate (4) is installed at a funnel opening, a sampling air outlet pipe (9) is connected to the upper portion of the fog drop collecting bottle (1) in the opposite direction of the air inlet pipe, a rubber plug (8) is sleeved on the air outlet pipe (9), the rubber plug (8) is connected with a stainless steel sleeve (10), the fog drop collecting bottle (1) is fixed on a sampling gun tube (13), and then the fog drop sampling connecting pipe (;
the pressure connecting pipe (16) is divided into dynamic and static pressure connecting pipes which are respectively connected with dynamic and static pressure interfaces of the full-automatic dynamic pressure balance sampling pump (19);
the temperature probe (11) transmits a temperature signal to the full-automatic dynamic pressure balance sampling pump (19) through a signal wire (15).
2. The device for detecting the concentration of the fog drops in tail gas of a diammonium phosphate device according to claim 1, wherein a pressure sensing port of a stainless steel dynamic and static pressure connecting pipe (12) is parallel to a sampling nozzle (6) of a fog drop sampling bottle, and the direction of the dynamic pressure sensing port is the same as that of the sampling nozzle (6).
3. The device for detecting the concentration of the tail gas fog drops of the diammonium phosphate device according to claim 1, wherein the sampling nozzle (6) is connected with the gas inlet pipe (7) through a plastic elbow (5), the sampling nozzle (6) can be freely and rotatably adjusted, and the caliber of the sampling nozzle can be selected according to the flow rate of the tail gas to adapt to sampling of different flow directions and flow rates of the tail gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921399964.2U CN210665375U (en) | 2019-08-23 | 2019-08-23 | Device for detecting concentration of droplets in tail gas generated in diammonium phosphate production |
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| CN201921399964.2U CN210665375U (en) | 2019-08-23 | 2019-08-23 | Device for detecting concentration of droplets in tail gas generated in diammonium phosphate production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188859A (en) * | 2021-05-11 | 2021-07-30 | 西安热工研究院有限公司 | Portable dynamic pressure balance constant speed droplet sampling rifle of telescopic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113188859A (en) * | 2021-05-11 | 2021-07-30 | 西安热工研究院有限公司 | Portable dynamic pressure balance constant speed droplet sampling rifle of telescopic |
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