CN210009708U - Supercritical fluid particle removing device - Google Patents
Supercritical fluid particle removing device Download PDFInfo
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- CN210009708U CN210009708U CN201920344767.4U CN201920344767U CN210009708U CN 210009708 U CN210009708 U CN 210009708U CN 201920344767 U CN201920344767 U CN 201920344767U CN 210009708 U CN210009708 U CN 210009708U
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Abstract
The utility model discloses a supercritical fluid granule desorption device, the desorption device include the filtration pipeline section of filter particle and with the deposition pipeline section that the filtration pipeline section is connected and makes the granule deposit, and supercritical fluid filters partial particle impurity through the filtration membrane of filtration pipeline section, and deposition particle impurity is subsided in the effect such as the effect of expanding and contracting of rethread deposition pipeline section and thermophoresis effect, realizes purifying supercritical fluid to the desorption of granule in the supercritical fluid. The utility model discloses a granule of multiple combined action in to supercritical fluid carries out powerful desorption, and the desorption is efficient, the desorption is effectual, improve equipment's operating efficiency, security, fluidic purity and the life of extension equipment, can get rid of the particle diameter and be less than 2.5 mu m's radioactivity and nonradioactive particulate matter, can regard as nuclear power and energy power field to the purifier who has radioactive supercritical fluid specially, effectively purify radioactivity and nonradioactive supercritical fluid.
Description
Technical Field
The utility model belongs to energy field and mechanical equipment field relate to nuclear energy field, energy power field and other fields supercritical fluid's purification, concretely relates to supercritical fluid granule desorption device.
Background
The dust removal purifier product is a common product in production and life, has various types and wide application, and plays a vital role in production and life. The small size of the mask is haze-proof, the drinking water is purified to reach the factory emission purification standard, and the mask has important significance for the health of residents and the environmental protection. Therefore, it is important to develop a dust removal purification apparatus suitable for various fields, particularly a purification apparatus of supercritical fluid suitable for nuclear energy field.
In the field of nuclear energy, supercritical carbon dioxide is selected as a working medium for a fourth-generation high-temperature gas cooled reactor, so that fine radioactive particles cannot be mixed in the working medium, the existence of the particles can influence the heat transfer performance of the working medium, influence the service life of a pipeline, even possibly influence the safe operation of the reactor, and more seriously threaten the life health of workers around a nuclear power station, and therefore, the removal of the fine particles in the supercritical carbon dioxide working medium is particularly important.
The existing particulate matter remover in the market comprises an electrostatic dust remover, a cyclone dust remover, a bag dust remover and the like, the high-temperature characteristic of a supercritical fluid is not considered, most of the particulate matters remove dust by using a single principle, the dust removing efficiency of the particulate matters with the diameter larger than 10 mu m is high, and the dust removing effect of the particulate matters with the diameter smaller than 2.5 mu m is poor. The existing dust removal method aiming at supercritical working medium, such as a particle remover taking supercritical carbon dioxide as the working medium and a passive particle removing device of a supercritical system, does not consider the radioactive characteristic of the supercritical fluid and selects radiation-proof materials, so that the remover can generate radiation to operators when working and influence the health of the operators. And the effect of removing the particles with the particle size of less than 2.5 mu m is not ideal.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems, the inventor of the present invention has made intensive studies to design a supercritical fluid particle removal device, wherein a supercritical fluid is subjected to comprehensive actions such as filtration of a filtration pipe section and thermophoretic deposition of a deposition pipe section to remove radioactive or nonradioactive particles, and the particles are collected and removed by a collection box.
An object of the utility model is to provide a supercritical fluid particle desorption device, the device is including the filtration pipeline section of filtering granule and the deposit pipeline section of being connected with the filtration pipeline section and making the granule deposit.
The utility model discloses the beneficial effect who has does:
(1) the removing device of the utility model can generate strong force through the comprehensive influence of the nano-filtration effect, the expansion and contraction effect and the thermophoresis effect, and optionally the centrifugal force and the turbulence effect, and can remove the particles in the supercritical fluid to the filtering membrane and the thermophoresis removing pipe wall with good removing effect, thereby ensuring the safe and stable operation of the equipment, improving the efficiency and prolonging the service life of the equipment;
(2) the deposition pipe section in the removing device of the utility model adopts a honeycomb structure, which increases the contact area between the supercritical fluid and the low temperature pipe wall, improves the thermophoresis deposition efficiency and further improves the particle removing effect;
(3) when the removal device of the utility model removes the particles, the compressed air is adopted, the particles on the thermophoresis removal pipe wall are cleaned and removed by the comprehensive action of the thermophoresis effect and the collection box is adopted to collect the cleaned particles, thereby improving the removal efficiency;
(4) the removing device of the utility model has simple structure, good removing effect, simple removing method and high efficiency, and can remove radioactive and non-radioactive particles with the particle size less than 2.5 mu m, thereby improving the operation efficiency and safety of the equipment, the purity of the fluid and prolonging the service life of the equipment;
(5) by adopting the supercritical fluid purification method by the removal device, part of fine particulate matter impurities are removed by filtering through the filtering membrane, and then the fine particulate matter is deposited through the deposition pipe section, so that the removal efficiency is obviously improved;
(6) the utility model discloses a desorption device can regard as nuclear power and energy power field to the purifier who has radioactive supercritical fluid specially, effectively purifies radioactive and nonradioactive supercritical fluid.
Drawings
Fig. 1 shows a schematic view of a supercritical fluid particle removal apparatus according to a preferred embodiment of the present invention;
figure 2 shows a top view of a preferred embodiment of the thermophoretic removal tube of the present invention.
The reference numbers illustrate:
1-a supercritical fluid pump;
2-a filter pipe section valve;
3-sealing screws;
4-a sealing gasket;
5-a filtration membrane;
6-supercritical fluid inlet valve;
7-compressed air inlet valve;
8-compressed air pump;
9-deposition of the tube section I;
10-cooling water outlet valve;
11-thermophoresis removing tube;
12-cooling water channel;
13-a cooling water pump;
14-cooling water inlet valve;
15-a particle collection cassette;
16-a particle outlet valve;
17-supercritical fluid outlet valve.
Detailed Description
The invention is explained in more detail below with reference to the drawings and preferred embodiments. The features and advantages of the present invention will become more apparent from the description.
The supercritical fluid reactor (SCWR) is the only reactor taking light water as coolant in six fourth generation nuclear reactors, is an innovative design developed on the basis of the existing water-cooled reactor technology and supercritical thermal power technology, and has the characteristics of simple system, small device size, high thermal efficiency, and better economy and safety compared with the existing running water-cooled reactor.
The inventor finds that during the operation of the supercritical fluid reactor, the supercritical fluid is high-temperature and high-pressure fluid, and during the operation of the equipment, components such as internal reactor components and fuel rods can generate a plurality of fine particles, and the fine particles can generate fluid accelerated corrosion, chemical corrosion, physical wear, abrasive corrosion and the like on a pipeline, and the interweaving of the effects can seriously affect the service life of the pipeline and possibly damage the integrity of a primary circuit, so that the supercritical fluid can not safely and stably operate in the pipeline. Therefore, it is extremely important to remove fine particulate impurities in the supercritical fluid.
According to the present invention, the utility model provides a supercritical fluid particle removal device, which comprises a filtering pipe section for filtering particles and a deposition pipe section 9 connected with the filtering pipe section and capable of depositing particles.
In the utility model, the removing device can remove particle impurities with the particle size less than 2.5 mu m in radioactive or non-radioactive supercritical fluid.
According to the utility model discloses, supercritical fluid particle removing device installs in the supercritical fluid pipeline, and supercritical fluid flows into the device from last direction extremely down, and supercritical fluid's flow direction is the direction of gravity promptly.
According to the utility model discloses, the entrance of the device is equipped with supercritical fluid pump 1 and filtration pipeline section valve 2, and supercritical fluid gets into through supercritical fluid pump 1 and filtration pipeline section valve 2 and filters the pipeline section.
According to the utility model discloses, the filtration pipeline section is equipped with filtration membrane 5, and supercritical fluid gets into the filtration pipeline section and at first filters through filtration membrane 5, removes some particle impurity, and filtration membrane 5's aperture size selects according to actual conditions, and preferably, filtration membrane 5 is the nanofiltration membrane of filterable particle size for the granule of 0.1 ~ 10 μm, and more preferably, filtration membrane 5 is the nanofiltration membrane of filterable particle size for the granule of 0.1 ~ 2.5 μm.
According to the utility model discloses, supercritical fluid's flow direction is perpendicular with filtration membrane 5, and filtration membrane 5 is fixed in the filtration pipeline section through seal ring 4 and sealing screw 3.
The utility model discloses in, when the granule of deposit reached the saturation on filtration membrane 5, need change or clear up filtration membrane 5, preferred periodic replacement or clearance filtration membrane 5 in order to guarantee the filter effect.
According to the utility model discloses, the filtration pipeline section is detachable for regular replacement or clearance filtration membrane 5, in order to guarantee the filter effect.
According to the utility model discloses, the filtration pipeline section is equipped with 1 to a plurality of filtration membrane 5, preferably 1 to 3 filtration membrane 5, can reach better filter effect. The number of the filtering membranes 5 is too large, so that the supercritical fluid is greatly hindered, and the supercritical fluid pump 1 is required to provide higher pressure to perform better filtering.
In the utility model, the supercritical fluid enters the filtering pipe section through the supercritical fluid inlet valve between the filtering pipe section, the filtering pipe section and the deposition pipe section 9.
According to the utility model discloses, deposition tube section 9 is including the supercritical fluid passageway that is used for the circulation of supercritical fluid, and supercritical fluid passageway includes thermophoresis desorption pipe 11, and supercritical fluid gets into thermophoresis desorption pipe 11 of supercritical fluid passageway, through the granule in the thermophoresis effect desorption supercritical fluid.
According to the utility model discloses, thermophoresis desorption pipe 11 is equipped with a plurality of, preferably 5 ~ 15, more preferably 9 ~ 12.
According to the utility model discloses, the pipe internal diameter of deposit pipeline section 9 is 8 ~ 32cm, preferably 10 ~ 30 cm.
According to the utility model discloses, the pipe internal diameter of thermophoresis desorption pipe 11 is 1 ~ 6cm, and preferably 1 ~ 5cm, the length of thermophoresis desorption pipe 11 equals with the deposit length of deposit pipeline section 9, and the length of deposit pipeline section 9 deposit is 0.3 ~ 1.5m, preferably 0.5 ~ 1.2 m.
According to the utility model discloses, the both ends of a plurality of thermophoresis desorption pipe 11 are linked together, preferably are linked together through the connecting plate.
The inventor finds that the supercritical fluid enters the deposition pipe section 9 and then is shunted to enter the plurality of thermophoresis removal pipes 11, because the flow section of the supercritical fluid is subjected to sudden change to cause expansion and contraction effect, under the expansion and contraction effect, the supercritical fluid and particle impurities in the supercritical fluid are subjected to friction and relative movement, so that particles in the supercritical fluid are removed to the inner wall of the thermophoresis removal pipes 11, and the removal of the particles is realized.
According to the utility model discloses, in deposition pipe section 9, detach the supercritical fluid passageway, the residual space is cooling water passageway 12, cooling water passageway 12 and the cooling water entry end that is equipped with cooling water inlet valve 14 and the cooling water exit end UNICOM that is equipped with cooling water outlet valve 10 form cooling water circulation system.
According to the utility model discloses, during the cooling water entered into cooling water passageway 12 by the cooling water entry end, then left cooling water passageway 12 by the cooling water exit end, formed cooling water circulation system.
The inventor finds that the supercritical fluid in the supercritical fluid channel flows in the thermophoresis removing pipe 11, and the cooling water flows in the cooling water channel, so that the temperature inside and outside the thermophoresis removing pipe 11 is different, and a temperature gradient is formed towards the direction of the pipe wall by the axis of the thermophoresis removing pipe 11, namely the temperature near the axis of the thermophoresis removing pipe 11 is higher, and gradually decreases towards the pipe wall, so that particles in the supercritical fluid generate a thermophoresis phenomenon under the action of a temperature field, namely the particles are acted by a force from one side of a hot area to one side of a cold area, so that the molecular motion in the supercritical fluid is severe, the number of times of particle collision in unit time is large, the number of times of particle collision of medium molecules in the cold area is small, and the number of times of particle collision of molecules at two sides and the difference of energy transfer are different, so that the particles move from a high, thereby causing the particles to deposit on the thermophoretic removal tube 11.
According to the utility model discloses, the flow direction of supercritical fluid is opposite with the flow direction of cooling water in the cooling water passageway 12 in thermophoresis desorption pipe 11 to the more quick cooling of realizing supercritical fluid.
In the utility model, the flow rate of the supercritical fluid is 0.4 m/s-1.6 m/s.
The inventor finds that the flow of cooling water is too small, the cooling effect is not obvious, so that the thermophoresis effect of the supercritical fluid is not obvious, the particle deposition effect is poor, and the removal efficiency is influenced; too large flow rate of cooling water may result in excessive cooling of the supercritical fluid, which may reduce the temperature of the supercritical fluid below the supercritical temperature to a non-supercritical state, thereby failing to achieve circulation of the supercritical fluid.
According to the utility model discloses, the flow of cooling water is 0.2 ~ 2.0m/s, preferably 0.4m/s ~ 1.6 m/s.
According to the utility model discloses, all kinds of normal atmospheric temperature water sources can be chooseed for use to the cooling water, and the cooling water circulated use after the cooler cooling.
According to the utility model, a plurality of thermophoresis removal tubes 11 are distributed side by side in the deposition tube section 9.
According to a preferred embodiment of the present invention, the thermophoresis removal tube 11 is a straight tube.
The utility model discloses in, when thermophoresis desorption pipe 11 is the straight tube, supercritical fluid at first gets into the filtration pipeline section, and filter membrane 5 through the filtration pipeline section gets rid of a part of granule impurity, then gets into thermophoresis desorption pipe 11 of deposit pipeline section 9, realizes the desorption of granule in the supercritical fluid under comprehensive effects such as expansion and contraction effect and thermophoresis effect to realize supercritical fluid's purification.
According to another preferred embodiment of the present invention, the thermophoresis removal tube 11 is a spiral tube.
The utility model discloses in, thermophoresis desorption pipe 11 is when the spiral pipe, supercritical fluid flows in thermophoresis desorption pipe 11, the effect of the centrifugal force that the structure of spiral pipe brought is received when supercritical fluid top-down flows, under the effect of centrifugal force, the granule receives the effect of centrifugal force, deposit to thermophoresis desorption pipe 11 on the inside pipe wall, and simultaneously, supercritical fluid motion process is more complicated in the spiral pipe, produce many little whirlpools, the laminar flow is destroyed, not only have the slip between the adjacent flow layer but also mix, lead to supercritical fluid to take place the torrent, the existence of torrent makes granule impurity be detached to thermophoresis desorption pipe 11 on the inside pipe wall. Therefore, the utility model discloses in when thermophoresis desorption pipe 11 is the spiral pipe, at first detach some particle impurity through the filter membrane of filtration pipeline section in the supercritical fluid, then get into thermophoresis desorption pipe 11 of deposit pipeline section, under multiple effects such as expansion and contraction effect, centrifugal force, torrent and thermophoresis effect, the granule is got rid of to thermophoresis desorption pipe 11 on the inside pipe wall to supercritical fluid's purification has been realized.
According to the utility model, the thermophoresis removing pipe 11 is distributed discontinuously or continuously, preferably discontinuously. For example a honeycomb structure distribution.
The inventor finds that the thermophoresis removing pipes 11 are distributed discontinuously, so that cooling water can be in full contact with the pipe walls of the thermophoresis removing pipes 11, the pipe walls of the thermophoresis removing pipes 11 are fully cooled, and cold wall surfaces are formed, so that the contact area of supercritical fluid and the cold wall surfaces can be increased to the maximum extent, the thermophoresis effect is enhanced, the thermophoresis deposition efficiency is improved, and the particle removing efficiency is further improved.
According to the utility model discloses, a plurality of thermophoresis desorption pipe 11 is honeycomb formula and distributes, and the center is equipped with thermophoresis desorption pipe 11, and other thermophoresis desorption pipes 11 are evenly distributed on the circumference that uses this desorption pipe as the centre of a circle, as shown in figure 2.
According to the utility model discloses, deposit 9 below of pipeline section is connected with the granule collection box 15 of collecting the granule.
According to the utility model discloses, in the deposit pipeline section, be equipped with the compressed air entry in thermophoresis desorption pipe 11's top, the compressed air entry is equipped with compressed air inlet valve 7, open this valve, compressed air pump 8 lets in high-pressure air to deposit pipeline section 9's supercritical fluid passageway, high-pressure air and then enter into thermophoresis desorption pipe 11, clean thermophoresis desorption pipe 11 inside pipe wall sedimentary granule, open deposit pipeline section 9 and granule and collect the granule outlet valve 16 between the box 10, the granule that cleans is collected in the granule is collected and is collected box 15, thereby the desorption of granule has been accomplished.
The utility model discloses an adopt highly-compressed air to clean the granule of deposit on thermophoresis desorption pipe 11, avoided dismantling thermophoresis desorption pipe 11 and carry out the complicated process that cleans, granule desorption process is simple, work efficiency is high.
According to the utility model discloses, establish a deposition pipeline section 9 and a granule collection box 15 and be a thermophoresis deposition unit, the device includes 1 ~ 9, preferably 3 ~ 9 thermophoresis deposition units, thermophoresis deposition unit is through deposition pipeline section 9 end to end series connection, preferably, the supercritical fluid outlet section of last deposition pipeline section 9 is connected with the entry end of next deposition pipeline section 9, and the outlet valve of the supercritical fluid of last deposition pipeline section 9 promptly is as the inlet valve of the supercritical fluid of next deposition pipeline section 9.
According to the utility model discloses, the inside pipe diameter of transition pipeline section is less than the inside pipe diameter of deposit pipeline section 9.
According to the utility model discloses, transition pipeline section and deposition pipeline section 9 pipeline all adopt stainless steel material to make, preferably low carbon austenite stainless steel material, more preferably corrosion-resistant, high temperature resistant, radioresistance low carbon austenite stainless steel material.
According to the utility model discloses, the coating has the nanometer coating on the pipe wall surface of transition pipeline section and deposit pipeline section 9, preferably coats 150 ~ 500 mu m nuclear power plant epoxy.
The utility model discloses the people discovery, when containing the high temperature supercritical fluid that has radioactivity in the supercritical fluid, produce the radiation to the staff for avoiding this desorption device when carrying out desorption during operation, influence personnel healthy, consequently need shield the radiation that the radioactive granule of supercritical fluid produced.
According to the invention, the outer walls of the transition pipe section and the deposition pipe section 9 are provided with a shielding material, preferably selected from Al-B4C complexThe material, PVC-PE composite material or lead-boron-polyethylene, etc. are combined, thereby endowing the utility model with the function of radiation prevention of radioactive particles.
Supercritical fluid particle desorption device can be used for desorption supercritical fluid internal 0.1 ~ 10 mu m particle diameter's radioactive particle, preferably is used for desorption supercritical fluid internal particle diameter to be 0.1 ~ 2.5 mu m's radioactive particle impurity.
The supercritical fluid particle removal device can realize the purification of the supercritical fluid, and the specific purification method comprises the following steps:
step 1, installing a supercritical fluid fine particle removal device in a supercritical fluid pipeline;
according to the utility model discloses, in step 1, in installing supercritical fluid particle removal device supercritical fluid pipeline, at this moment, supercritical fluid pump 1 and filtration pipeline section valve 2 are closed state, and compressed air pump 8 and compressed air inlet valve 7 are closed state, and supercritical fluid inlet valve 6, supercritical fluid outlet valve 17 are open state, and particle outlet valve 16 is closed state.
And 2, cooling water circulation is carried out, and then the supercritical fluid enters a transition pipe section and a deposition pipe section (9) to remove particles.
According to the present invention, in step 2, after the supercritical fluid particle removal device is installed or prepared, the particles in the supercritical fluid are removed.
According to the utility model discloses, in step 2, carry out the cooling water circulation, open cooling water inlet valve 14, cooling water pump 13 and cooling water outlet valve 10, let in the cooling water to cooling water passageway 12, the temperature of cooling water is less than the temperature of supercritical fluid, and the cooling water temperature is 150 ~ 400K with the range of the temperature difference of supercritical fluid, preferably 200 ~ 350K, more preferably 250 ~ 300K, forms cooling water circulation system.
According to the utility model discloses, in step 2, open filtration pipeline section valve 2, supercritical fluid carries out the granule desorption through supercritical fluid pump 1 flow through filtration membrane 5, then gets into thermophoresis desorption pipe 11.
According to the utility model discloses, in step 2, open filtration pipeline section valve 2, open supercritical fluid pump 1, supercritical fluid enters into the filtration pipeline section through supercritical fluid pump 1, supercritical fluid at first passes through filtration membrane 5, some granule deposits on filtration membrane 5, then supercritical fluid enters into the supercritical fluid pipeline of deposition pipeline section 9 through supercritical fluid inlet valve 6, then shunt to in a plurality of thermophoresis desorption pipe 11, granule impurity in the supercritical fluid is at the effect of scaling, thermophoresis effect, preferably still include under the combined action of centrifugal force effect and torrent effect, deposit on thermophoresis desorption pipe 11's the inside pipe wall, realize the desorption to the granule, thereby realize supercritical fluid's purification.
And 3, closing the supercritical fluid inlet valve 6 and the supercritical fluid pump 1 after the removal is finished.
According to the utility model discloses, in step 3, after the removal, close filtration pipeline section valve 2, supercritical fluid inlet valve 6 and supercritical fluid pump 1, no longer flow in supercritical fluid in messenger's filtration pipeline section and the deposit pipeline section 9 to can follow-up cleaning the granule in thermophoresis deposition tube 11.
The utility model discloses in, in practical application, different application condition, equipment and system are different to the requirement of fine particle concentration, and the fine particle concentration that satisfies the requirement can be adjusted according to actual requirement, and the radioactive intensity of fine particle concentration accessible supercritical fluid detects in the supercritical fluid.
According to the utility model, in the step 3, according to actual need, the particulate matter in the supercritical fluid is removed regularly. For example, when the device of the present invention is used for particle removal, the radioactivity intensity in the supercritical fluid is less than 4 x 105When Bq is reached, the removal can be stopped, and the removal is finished.
And 4, cleaning the inner wall of the thermophoresis removing pipe (11).
According to the utility model, in step 4, the supercritical fluid no longer enters the filtering pipe section and the deposition pipe section 9, and the particles in the thermophoresis desorption pipe 11 are cleaned.
According to the utility model discloses, in step 4, open particulate matter outlet valve 16, air compression inlet valve 7 and air compression pump 8, optionally let in high temperature fluid in cooling water passageway 12, clean the inside pipe wall of thermophoresis desorption pipe 11, make the granule of deposit on thermophoresis desorption pipe 11 pipe wall drop from the pipe wall.
According to the utility model discloses, in step 4, open air compression inlet valve 7, open air compressor pump 8, utilize highly-compressed air to clean the sedimentary granule on thermophoresis desorption pipe 11 inside pipe wall, the granule that cleans drops from thermophoresis desorption pipe 11's inside pipe wall, moves along thermophoresis desorption pipe 11 in highly-compressed air's direction, until falling into granule collection box 15, carries out the collection of granule.
According to the utility model discloses, in step 4, optionally let in high temperature fluid in cooling water passageway 12, high temperature fluid's temperature is higher than the thermophoresis desorption intraductal temperature to make pipe wall and intraductal formation temperature gradient, produce the thermophoresis effect, and then make the granule of deposit on thermophoresis desorption pipe 11 inside pipe wall receive by the straight power to the pipe axis of inside pipe wall, make the granule drop from the inside pipe wall, fall into in granule collection box 15 under highly-compressed air's effect simultaneously.
The utility model discloses in, adopt the high-pressure air optionally to clean the particulate matter of deposit on thermophoresis desorption pipe 11 inside pipe walls with the synergism of thermophoresis effect and get rid of, the granule that cleans falls into in the granule collection box 15.
And step 5, finishing the cleaning, and collecting the particles into the particle collecting box 15.
According to the utility model discloses, in step 5, through the dead time, after finishing, the granule that cleans when thermophoresis desorption pipe 11 pipe wall, no longer have the granule promptly and get into the granule and collect the box, collect the process and end, close granule outlet valve 16, clear up the granule in the box 15 is collected to the granule, accomplish the desorption process of granule.
The supercritical fluid particle removal device has simple structure and is suitable for large-scale industrial production and application; the utility model discloses a desorption device optionally still includes comprehensive action desorption granule such as centrifugation and torrent through nanofiltration effect, thermophoresis effect, and this desorption device can get rid of the particle size and be less than 2.5 mu m's particulate matter, and this desorption device sets up the granule outside the pipeline and collects the box, adopts highly-compressed air to clean and thermophoresis effect to clean the collection to the granule on thermophoresis desorption pipe inside wall, improves desorption efficiency.
Examples
Example 1
A supercritical fluid particle removal device comprises a filtering pipe section and a deposition pipe section, wherein a supercritical fluid pipeline is connected with the filtering pipe section, a supercritical fluid pump and a filtering pipe section valve are arranged in the middle of the supercritical fluid pipeline, two nano-filtration membranes are arranged on the filtering pipe section, the nano-filtration membranes are nano-filtration membranes capable of filtering particles of 0.1-2.5 microns, and the nano-filtration membranes are fixed on the filtering pipe section through sealing gaskets and sealing screws. A supercritical fluid inlet valve is arranged between the filtering pipe section and the deposition pipe section.
The deposition pipe section comprises a supercritical fluid channel and a cooling water channel, the inner diameter of the pipe of the deposition pipe section is 20cm, the supercritical fluid channel comprises 9 thermophoresis removal pipes which are distributed in a honeycomb structure, as shown in figure 2, the middle of the deposition pipe section is provided with one thermophoresis removal pipe, the other 8 thermophoresis removal pipes are uniformly distributed around the middle thermophoresis removal pipe, the inner diameter of the pipe of the thermophoresis removal pipe is 2cm, and the length of the deposition pipe section is 1 m. The thermophoresis removing pipe is a straight pipe, and two ends of the thermophoresis removing pipe are communicated through a connecting plate. The path, i.e. the length of the flow path, over which the supercritical fluid flows in the removal device is about 10 m. The cooling water enters the cooling water pipeline through the cooling water inlet valve and leaves from the cooling water outlet valve to form a cooling water circulating system.
A particle collecting box is connected below the deposition pipe section, and a particle outlet valve is arranged between the deposition pipe section and the particle collecting box.
The deposition pipe section is provided with three deposition pipe sections, a particle collecting box is arranged below each deposition pipe section, the three deposition pipe sections are connected in series or connected end to end, the supercritical fluid inlet end of the first deposition pipe section is connected with the filtering pipe section, the supercritical fluid outlet end of the first deposition pipe section is connected with the supercritical fluid inlet end of the second deposition pipe section, a supercritical fluid outlet valve is arranged in the middle of the first deposition pipe section, the supercritical fluid outlet end of the second deposition pipe section is connected with the supercritical fluid inlet end of the third deposition pipe section, a supercritical fluid outlet valve is arranged in the middle of the second deposition pipe section, and the supercritical fluid outlet end of the third deposition pipe section is connected.
The pipelines of the filtering pipe section and the deposition pipe section are made of low-carbon, corrosion-resistant, high-temperature-resistant and radiation-resistant low-carbon austenitic stainless steel materials, the outer surface of the pipe wall is coated with 250 mu m nuclear power equipment epoxy coating, and the outer wall of the pipeline is also provided with Al-B4C composite material.
Example 2
The supercritical fluid is purified by the supercritical fluid particle removal device of example 1 to remove the radioactive particle impurities.
The supercritical fluid particle removal device of the embodiment 1 of the utility model is arranged on the supercritical fluid pipeline;
opening a cooling water inlet valve and a cooling water outlet valve, and introducing cooling water into the cooling water channel, wherein the flow speed of the cooling water is 1.6 m/s; opening a supercritical fluid inlet valve, opening a filtering section valve, starting a supercritical fluid pump, allowing the supercritical fluid to flow through a filtering membrane for removal at the flow rate of 1.6m/s through the supercritical fluid pump, and then allowing the supercritical fluid to enter a thermophoresis removal tube;
testing the radioactivity of the supercritical fluid before it entered the removal unit to be 2X 106Bq, the radioactivity intensity of the supercritical fluid flowing out of the removal device after 10s is 4 multiplied by 105Bq, meeting the requirements, and stopping removing;
after the removal is finished, closing the supercritical fluid inlet valve and the supercritical fluid pump to ensure that the supercritical fluid does not flow into the filtering pipe section and the deposition pipe section any more, opening the particle outlet valve, the air compression inlet valve and the air compression pump, introducing high-temperature fluid into the cooling water channel, cleaning the inner wall of the thermophoresis removal pipe by adopting the comprehensive action of high-pressure air and thermophoresis effect, collecting particles by the collection box, closing the particle outlet valve after the collection process is finished, cleaning the particles in the collection box, and finishing the removal process of the particles.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", and the like indicate the orientation or positional relationship based on the operation state of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention has been described in detail with reference to the preferred embodiments and the exemplary embodiments. It should be noted, however, that these specific embodiments are only illustrative explanations of the present invention, and do not set any limit to the scope of the present invention. Without departing from the spirit and scope of the present invention, various modifications, equivalent replacements, or modifications may be made to the technical content and embodiments thereof, which all fall within the scope of the present invention. The protection scope of the present invention is subject to the appended claims.
Claims (10)
1. A supercritical fluid particle removal apparatus, characterized in that the apparatus comprises a filtering pipe section for filtering particles and a deposition pipe section (9) connected with the filtering pipe section and depositing particles,
the filtering pipe section is provided with a filtering membrane (5), the filtering membrane (5) can filter filtering membranes of fine particles with the particle size of 0.1-10 mu m, the filtering pipe section is detachable,
the deposition pipe section (9) comprises a supercritical fluid channel for the circulation of a supercritical fluid, the supercritical fluid channel comprises a thermophoresis removal pipe (11),
a particle collecting box (15) is connected below the deposition pipe section.
2. The device according to claim 1, characterized in that the thermophoretic removal tube (11) is provided in a plurality, and the two ends of the thermophoretic removal tube (11) are communicated.
3. The apparatus according to claim 2, wherein in the deposition tube section, the supercritical fluid passage is eliminated, and the remaining space is a cooling water passage (12), and the cooling water passage (12) is communicated with a cooling water inlet port provided with a cooling water inlet valve (14) and a cooling water outlet port provided with a cooling water outlet valve (10) to form a cooling water circulation system.
4. The device according to claim 3, characterized in that the thermophoretic removal tubes (11) are straight tubes or spiral tubes, and the thermophoretic removal tubes (11) are distributed discontinuously or continuously.
5. The device according to claim 4, characterized in that the thermophoretic removal tubes (11) are distributed in a honeycomb structure.
6. The device according to claim 1, characterized in that a compressed air inlet valve (7) is arranged above the thermophoretic removal pipe (11) of the deposition pipe section (9), a compressed air pump (8) is used for introducing compressed air from the compressed air inlet valve (7) into the supercritical fluid channel of the deposition pipe section (9) to clean particles deposited on the inner wall of the thermophoretic removal pipe (11), and the removed particles are collected by a particle collection box (15).
7. The device according to claim 1, characterized in that there are 1-3 filtering pipe sections, one depositing pipe section (9) and one particle collecting box (15) are a thermophoretic deposition unit, and the device comprises 1-9 thermophoretic deposition units which are connected end to end in series through the depositing pipe sections (9).
8. The device according to claim 7, characterized in that the filter pipe section has a smaller pipe inner diameter than the pipe inner diameter of the deposition pipe section (9).
9. The apparatus of claim 7, wherein the apparatus comprises 3-9 thermophoretic deposition units.
10. The device according to claim 9, characterized in that the pipes of the filter pipe section and the deposition pipe section (9) are made of a low carbon austenitic stainless steel material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920344767.4U CN210009708U (en) | 2019-03-19 | 2019-03-19 | Supercritical fluid particle removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920344767.4U CN210009708U (en) | 2019-03-19 | 2019-03-19 | Supercritical fluid particle removing device |
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| CN210009708U true CN210009708U (en) | 2020-02-04 |
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| CN201920344767.4U Active CN210009708U (en) | 2019-03-19 | 2019-03-19 | Supercritical fluid particle removing device |
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| CN (1) | CN210009708U (en) |
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