CN110180291A - Absorb spraying equipment and including its to spray dust pelletizing system - Google Patents
Absorb spraying equipment and including its to spray dust pelletizing system Download PDFInfo
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- CN110180291A CN110180291A CN201910527880.0A CN201910527880A CN110180291A CN 110180291 A CN110180291 A CN 110180291A CN 201910527880 A CN201910527880 A CN 201910527880A CN 110180291 A CN110180291 A CN 110180291A
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- dust
- spraying
- water mist
- negative pressure
- containing gas
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- 239000000428 dust Substances 0.000 title claims abstract description 306
- 238000005507 spraying Methods 0.000 title claims abstract description 142
- 239000007921 spray Substances 0.000 title claims abstract description 23
- 238000005453 pelletization Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 239000003595 mist Substances 0.000 claims abstract description 95
- 238000002347 injection Methods 0.000 claims abstract description 41
- 239000007924 injection Substances 0.000 claims abstract description 41
- 238000010521 absorption reaction Methods 0.000 claims description 17
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000010410 dusting Methods 0.000 claims 2
- 238000000605 extraction Methods 0.000 claims 1
- 230000008676 import Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 21
- 238000000034 method Methods 0.000 description 9
- 239000000779 smoke Substances 0.000 description 7
- 238000005422 blasting Methods 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 3
- 238000009718 spray deposition Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
- B01D47/063—Spray cleaning with two or more jets impinging against each other
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Particles Using Liquids (AREA)
- Separating Particles In Gases By Inertia (AREA)
Abstract
The present invention provides it is a kind of can preferably to dust especially fine dust carry out capture dedusting dust suction spraying equipment and including its to spray dust pelletizing system, dust suction spraying equipment therein includes: dust collecting port, have entering-dust mouth, dust sucting pipeline and dust mouth；At least one ejection section, ejection section have injection import, injection pipe and jet exit, and injection import is connected with dust mouth；And at least one negative-pressure air fan, at least one negative-pressure air fan is corresponded at least one ejection section respectively, negative-pressure air fan is mounted on the jet exit of corresponding ejection section, the negative pressure generated by negative-pressure air fan sucks dusty gas from entering-dust mouth allows the dusty gas to spray from jet exit again, and there is collision area between the motion profile energy for the dusty gas being ejected and the motion profile of water mist, there is predetermined difference value between the air speed energy for the dusty gas being ejected and the Velocity of Mist of water mist.
Description
Technical Field
The invention relates to an absorption spraying device and a opposite spraying dust removing system comprising the same.
Background
At present, dust generated in a closed or semi-closed space is subjected to water mist dust removal in movement along with air flow diffusion through water mist, however, at present, the spraying angle of the water mist is adjusted only according to the diffusion direction of the dust-containing air flow, so that mist drops in the water mist can capture the dust in the water mist, the dust is aggregated and settled, and dust removal is performed. If the mist droplets are too fine, they are also susceptible to the above-described swirling, and are also difficult to collide with dust.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an absorption and ejection device capable of capturing and removing dust, particularly fine dust, more favorably, and a dust-removing system for opposite ejection including the same.
In order to achieve the purpose, the invention adopts the following scheme:
the invention provides a dust absorption injection device, which is used for absorbing dust-containing gas to be subjected to dust removal treatment in a closed or semi-closed space through negative pressure and forming water mist injection to a spraying device so as to collect the water mist to complete the dust removal treatment, and is characterized by comprising the following components: the dust collection part is provided with a dust inlet, a dust collection pipeline and a dust outlet; the spraying part is provided with a spraying inlet, a spraying pipeline and a spraying outlet, and the spraying inlet is communicated with the dust outlet; and the negative pressure fans are respectively in one-to-one correspondence with the at least one spraying part, the negative pressure fans are arranged at the spraying outlets of the spraying parts corresponding to the negative pressure fans, the negative pressure generated by the negative pressure fans sucks in the dust-containing gas from the dust inlet and then enables the dust-containing gas to be sprayed out from the spraying outlets, a collision area is formed between the motion track of the sprayed dust-containing gas and the motion track of the water mist, and a preset difference value is formed between the airflow motion speed of the sprayed dust-containing gas and the water mist motion speed of the water mist.
The dust suction and ejection apparatus provided by the present invention is also characterized in that the predetermined difference is 35 m/sec or more.
The dust collection spraying equipment provided by the invention is also characterized in that a plurality of splitter plates are arranged at intervals side by side along the direction vertical to the trend of the dust collection pipeline at the dust inlet.
The dust suction and injection equipment provided by the invention is also characterized in that the dust blocking curtain is vertically arranged in the dust suction pipeline along the trend of the dust suction pipeline.
The dust absorption spraying equipment provided by the invention is also characterized in that the dust blocking curtain is made of an electrostatic material.
The dust-absorbing injection equipment provided by the invention is also characterized in that the width of the dust inlet is matched with the width of the closed or semi-closed space, and the height of the dust inlet is half of the height which can cover the closed or semi-closed space from the lower edge of the dust inlet upwards.
The dust-absorbing spraying equipment provided by the invention is also characterized in that the semi-closed space is a tunnel.
The invention also provides a spraying dust removal system which is used for collecting the dust-containing gas to be subjected to dust removal treatment in the closed or semi-closed space through water mist to complete the dust removal treatment, and is characterized by comprising the following components: a spraying device for forming a water mist; and the dust absorption spraying equipment is used for absorbing the dust-containing gas to be subjected to dust removal treatment through negative pressure and spraying the dust-containing gas to the water mist to collect the water mist so as to complete the dust removal treatment, wherein the dust absorption spraying equipment is the dust absorption spraying equipment.
The invention provides a spraying dust removing device, which is also characterized in that the spraying device is provided with a water supply device and a spraying device, the water supply device supplies water for spraying, the spraying device receives the water for spraying to form water mist, and the spraying device is provided with at least one spray former which enables the received water for spraying to form water mist.
The opposite-spraying dust removing equipment provided by the invention is also characterized in that the flowing speed of the dust-containing gas in the lower negative pressure area of the closed or semi-closed space is 0.8-1.2m/s, the speed at the negative pressure inlet of the dust-collecting spraying equipment is 3m/s, the spraying speed of the dust-containing gas sprayed from the spraying outlet is more than 60m/s, and the spraying speed of the water mist is 25-35 m/s.
The opposite spraying dust removing equipment provided by the invention is also characterized in that the air pressure of the negative pressure fan is more than or equal to 2000 Pa.
The opposite spraying dust removing equipment provided by the invention also has the characteristics that: the moving device is provided with a roller supporting frame for moving and supporting and a supporting plate arranged on the roller supporting frame, and the spraying equipment and the dust absorption spraying equipment are correspondingly arranged on the supporting plate along the length direction of the supporting plate.
The opposite spraying dust removing equipment provided by the invention also has the characteristics that: and the power supply equipment is arranged on the supporting plate and used for supplying power to the spraying equipment and the dust absorption spraying equipment.
The opposite spraying dust removing equipment provided by the invention also has the characteristics that: and the electric control cabinet is arranged on the supporting plate and used for controlling the operation of the spraying equipment and the dust absorption spraying equipment.
The opposite spraying dust removing equipment provided by the invention also has the characteristics that: the control panel, mobile device are the truck, and control panel sets up in the driver's cabin of truck.
The opposite spraying dust removing device provided by the invention is also characterized in that a part of the front end of the support plate extends forwards along the inner side of the cab, the dust collecting spraying device is arranged on the part, the spraying device is correspondingly arranged on the part close to the rear end of the support plate, and the power supply device and the electric control cabinet are sequentially arranged between the dust collecting spraying device and the spraying device.
Action and Effect of the invention
According to the dust collection and injection equipment and the opposite-spraying dust removal system comprising the same, the dust collection and injection equipment comprises a dust collection part with a dust inlet, a dust collection pipeline and a dust outlet, injection parts with an injection inlet, an injection pipeline and an injection outlet, and negative pressure fans which are respectively in one-to-one correspondence with the injection parts, dust-containing gas is sucked from the dust inlet through negative pressure generated by the negative pressure fans and then is sprayed out from the injection outlets, a collision area is formed between the motion track of the sprayed dust-containing gas and the motion track of water mist, and a preset difference value is formed between the air flow motion speed of the sprayed dust-containing gas and the water mist motion speed of the water mist. The dust spraying device of the dust-containing gas is used for sucking the dust-containing gas to be dedusted and spraying the sucked dust-containing gas and the spraying device of the spray head for spraying and forming water mist to perform dedusting treatment on the dust-containing gas, and a collision area is arranged between the motion trail of the sprayed dust-containing gas and the motion trail of the water mist, so that the possibility of collision between the dust-containing gas and the water mist is ensured, meanwhile, a preset difference value is arranged between the motion speed of the air flow of the sprayed dust-containing gas and the motion speed of the water mist, and the motion trail of at least one of the dust-containing gas or the water mist is not easily influenced by the air flow by the motion of the dust-containing gas and the water mist, so that certain inertial linear motion can be ensured as far as possible, therefore, more dust-containing gas and the water mist can be contacted in the collision area as far as possible and more full collision can be ensured, and the dust settling and removing effect of the water mist on the dust-containing gas is enhanced, and particularly when aiming at fine dust, the dust removing effect on the fine dust can be improved because the condition that the fine dust is easy to orbit due to small motion inertia can be avoided as much as possible.
Drawings
FIG. 1 is a schematic view of a blasting dust control system according to an embodiment in a tunnel;
FIG. 2 is a schematic structural view of a counter-blowing dust removal system according to an embodiment;
FIG. 3 is a schematic structural view of a dust suction and ejection apparatus according to an embodiment;
FIG. 4 is a schematic structural diagram of a moving device of a blasting dust removing system according to an embodiment;
fig. 5 is a perspective schematic view of a blasting dust removing system used in a tunnel according to an embodiment.
Detailed Description
The invention is further illustrated below with reference to specific embodiments and the accompanying drawings.
The opposite-spraying dedusting system is used in a closed or semi-closed space, and is used for dedusting dusty gas through water mist dedusting, specifically, dust in jetted airflow is captured through fog drops in formed water mist, and the condensed dust is settled, so that dedusting is completed, or the dust is reduced.
In addition, the water mist is used for dedusting, fine dust is light in weight, easy to diffuse and pollute, easy to be influenced by airflow and difficult to capture, and therefore the dedusting effect of the fine dust is directly related to the overall dedusting effect of the water mist.
FIG. 1 is a schematic view of a blasting dust removing system in a tunnel according to an embodiment.
In the present embodiment, the use of the dust blowing and removing system 1 in a space in which a semi-closed space is a tunnel 2 will be specifically described as an example.
FIG. 2 is a schematic structural view of a counter-blowing dust removal system according to an embodiment;
fig. 3 is a schematic structural view of a dust suction and ejection apparatus according to an embodiment.
As shown in fig. 2 and 3, the opposite spray dust removing system 1 includes a dust suction spraying apparatus 100 and a spraying apparatus 200.
The dust suction and injection device 100 is used for sucking dust-containing gas to be subjected to dust removal treatment in a closed or semi-closed space by negative pressure and forming water mist injection to the spraying device 200 to trap the water mist to complete dust removal treatment.
In the present embodiment, the dust suction and spray apparatus 100 includes a dust suction part 110, a spray part 120, and a negative pressure fan 130.
The dust suction part 110 has a dust inlet 111, a dust suction duct 112 and a dust outlet 113, and when in operation, the dust inlet 111 is also a negative pressure inlet for the dust-containing airflow.
At least one of the injection parts 120, the injection part 120 having an injection inlet 121, an injection pipe 122 and an injection outlet 123, the injection inlet 121 communicating with the dust outlet 113.
At least one negative pressure fan 130, wherein the at least one negative pressure fan 130 is respectively corresponding to the at least one injection part 120, that is, each negative pressure fan 130 corresponds to one injection part 120. In addition, each negative pressure fan 130 is installed at the ejection outlet 123 of the ejection part 120 corresponding thereto.
The key of this embodiment is to satisfy the following two conditions: (1) a collision area is arranged between the motion trail of the ejected dust-containing gas and the motion trail of the water mist, namely, the dust-containing gas and the water mist are respectively ejected and move according to certain inertia and need to collide, so that the dust-containing gas and the water mist can be ensured to be contacted with each other, and the possibility that the dust-containing gas is captured by the water mist can be further ensured; (2) the air current velocity of motion of the dusty gas that is erupted and the water smoke velocity of motion of water smoke have predetermined difference between them, through certain predetermined difference between air current velocity of motion and the water smoke velocity of motion like this, make the air current velocity of motion big certain difference relatively to the water smoke velocity of motion, or the water smoke velocity of motion big certain difference relatively to the air current velocity of motion, just so can guarantee the motion orbit of at least one in dusty gas or the water smoke, be difficult to receive the influence of the air current that dusty gas and water smoke motion caused, thereby can guarantee certain inertia linear motion as far as possible. Therefore, through the cooperation of the two conditions, more dust-containing gas and water mist can be contacted in the collision area and can be fully collided as far as possible, and the capacity of the water mist for capturing the dust-containing gas is improved, so that the dust falling and dust removing effect of the water mist on the dust-containing gas is enhanced.
In this embodiment, the negative pressure generated by the negative pressure fan 130 can suck the dust-containing gas from the dust inlet 111 and then eject the dust-containing gas from the ejection outlet 123, so that the ejected dust-containing gas can have a condition of running according to a certain motion trajectory to have a collision region with the motion trajectory of the formed water mist, and the ejected dust-containing gas can have a certain air flow motion speed to have the predetermined difference with the water mist motion speed of the water mist, thereby implementing the above two conditions and further implementing the above dust-settling effect.
In addition, the predetermined difference value is preferably equal to or greater than 35m/s, so that higher water mist dedusting effect can be ensured.
In addition, in the process of sucking in the dusty airflow by negative pressure, the dust inlet 111 is easily affected by the size and shape of the dust inlet 111, the shape and direction of the subsequent dust suction pipeline 112, the dust outlet 113, the injection inlet 121, the injection pipeline 122 and the injection outlet 123, the negative pressure of the negative pressure fan 130, and the like, so that the speed of the dusty airflow entering the dust inlet 111 cannot be uniformly distributed, a certain amount of dusty airflow entering is difficult to ensure, and the use efficiency of the whole system and the dust removal efficiency in the space are reduced. Therefore, in the present embodiment, a plurality of splitter plates 111a may be disposed at intervals side by side in the direction perpendicular to the direction of the dust suction duct 112 at the dust inlet 111, and in fact, a plurality of splitter plates 111a may be disposed in the longitudinal direction of the dust inlet 111, so that the balance of the dust-containing airflow entering from the dust inlet 111 can be improved, and the utilization efficiency of the whole system and the dust removal efficiency in the space can be improved.
In addition, in order to prevent the dust in the dusty airflow entering through the negative pressure from settling to some extent, and to reduce the dust with larger particles in the dusty airflow to further ensure the subsequent spray dust removal effect, a dust blocking curtain can be vertically arranged in the dust suction pipeline 112 along the trend, and particularly, the dust blocking curtain is made of an electrostatic material, so that the effect of preventing settling can be further improved through electrostatic adsorption of dust particles.
The width of the dust inlet 111 matches the width of the closed or semi-closed space, i.e. the width d of the tunnel 2 in this embodiment, and the height of the dust inlet 111 is half of the height that can cover the closed or semi-closed space from the lower edge of the dust inlet 111 upward, i.e. the height h that can cover the tunnel 2 from the lower edge of the dust inlet 111 upward in this embodiment. Therefore, the dust-containing air flow in the space can be completely absorbed to a certain extent, and a certain space can be reserved to finish spraying and dust falling. In order to ensure the suction effect of the negative pressure on the dust-containing air flow in the space and to ensure a certain capturing effect, the lower edge of the dust inlet 111 should be as close to the ground of the tunnel 2 as possible.
The spraying apparatus 200 is used to form water mist, and the spraying apparatus 200 has a water supply device 210 and a spraying device 220.
The water supply device 210 supplies water for spraying, and the water for spraying may be general water or water containing a dust removing agent.
The spraying device 220 receives the water for spraying to form a water mist through the spraying head, the spraying device 220 is provided with at least one spray forming device 221, the received water for spraying is formed into the water mist through the spray forming device 221, specifically, the spray forming device 221 can be a spraying head, or can be a plurality of spraying heads, and the spraying heads are arranged according to a certain rule, for example, the spraying heads are arranged around a circle in the interior of an annular barrel to form a barrel type.
In addition, the opposite spraying dust removing system 1 further comprises a moving device 300, the moving device 300 is used for loading, so that the whole opposite spraying dust removing system 1 is convenient to transport and is practical on site, and the opposite spraying dust removing system can be loaded by using the steel bracket 310 as a fixed bracket. The moving device 300 has a roller support frame 320 for moving and supporting and a support plate 330 disposed on the roller support frame 320, and the spraying apparatus 200 and the dust-suction spraying apparatus 100 are symmetrically disposed on the support plate 330 in a length direction of the support plate 330. The mobile device 300 in this embodiment is a truck having a cab 340.
In addition, the pair spray dust removing system 1 of the present embodiment further includes a power supply apparatus 400 provided on the support plate 330 for supplying power to the spray apparatus 200 and the dust suction spray apparatus 100.
In addition, the opposite-spraying dust removing system 1 of the present embodiment further includes an electric control cabinet 500 provided on the support plate 330 for controlling the operations of the spraying apparatus 200 and the dust suction spraying apparatus 100.
In addition, the opposite spraying dust removing system 1 in the embodiment further comprises a control panel 600, and the control panel 600 is arranged in the cab 340, so that an operator can conveniently operate in the cab 340 in use and control actual spraying and the like, and thus dust harm to the operator caused by dust in the space outside the cab 340 in use can be reduced.
Fig. 4 is a schematic structural diagram of a moving device of a opposite-spraying dust removing system according to an embodiment.
In addition, as shown in fig. 4, in the present embodiment, a portion 330a of the front end of the support plate 330 extends forward along the inner side of the cab 340, that is, the support plate 330 extends forward around the cab 340, and the dust suction and ejection device 100 is disposed on the portion 330a, which can prevent the dust suction and ejection device 100 from obstructing the cab 340, particularly the sight line of the operator or the driver inside the cab 340. And the spraying apparatus 200 is symmetrically disposed at a portion near the rear end of the support plate 330. Specifically, in the present embodiment, most of the dust suction part 110 is disposed on a portion 330, the rear end of the dust suction duct 112 near the dust outlet 113 is bent upward, the portion of each of the injection ducts 122 near the injection inlet 121 is fixed by the steel bracket 310, and the negative pressure fan 130 extends upward from the injection outlet 123 and is inclined forward at a certain angle; and the spraying means 220 and the water supply means 210 are sequentially disposed at corresponding positions from front to rear, and each of the spray formers 221 is of a barrel type and is also inclined upward and forward at a certain angle. The installation of the negative pressure fan 130 and the mist former 221 is adjusted based on the fact that the collision region between the ejected dust-containing gas and the mist satisfies a better trapping effect. At this time, the power supply apparatus 400 and the electrical control cabinet 500 are sequentially disposed between the dust suction and spray apparatus 100 and the mist spray apparatus 200.
In addition, for more convenient transportation, the dust suction part 110 can be detachably mounted or can be adjusted in angle, so that the driver's cab 340 can be better prevented from being shielded in the transportation process.
In addition, in order to better adapt to the actual situation in the field, the spraying angle of each negative pressure fan spraying port can be adjusted by adjusting the angle of the negative pressure fan or the spraying port, and similarly, the spraying angle of the water mist can also be adjusted by adjusting the angle of the whole spray former 221 or a single spraying head.
Dust removal process
Fig. 5 is a perspective schematic view of a blasting dust removing system used in a tunnel according to an embodiment.
The dust removal process of the dust removal system 1 according to the present embodiment is specifically described below with reference to fig. 5:
as shown in fig. 5, the opposite dust spraying system 1 is arranged at one end of the tunnel 2, after the opposite dust spraying system 1 starts to work, a negative pressure dust collection control area is firstly generated near the dust inlet 111 due to the negative pressure effect, so that the dust-containing airflow enters from the dust inlet 111 and is sprayed out through the spraying outlet 123, thus the tunnel 2 is gradually divided into an upper positive pressure area and a lower negative pressure area, and simultaneously, the sprayed dust-containing airflow can be settled through the combination of collision with the water mist, so that the dust concentration of the upper positive pressure area is smaller than that of the lower positive pressure area, therefore, in the process, the dust generated in the tunnel 2 is diffused from high concentration to low concentration, and can enter from the dust inlet 111 along with the negative pressure, thereby circulating, and continuously performing dust fall treatment on the dust generated in the tunnel 2.
In addition, the process of collision dust removal of the water mist and the dusty airflow is as follows: after the dusty airflow is sprayed out from the spraying outlet 123, due to the fact that the preset difference value exists between the airflow movement speed of the dusty air and the water mist movement speed of the water mist, the dust in the dusty airflow can be less affected by the water mist generated by the water mist and the rotation of the airflow, the rotation reversing near the fog drops is reduced, therefore, most of the dust can well collide with the fog drops in the diffusion process of a collision area (dust mist particle condensation, diffusion and weight increasing area) to generate condensation and weight increase, the weighted dust keeps certain inertia to continuously collide with each other in diffusion until the weight reaches a certain degree and then settles (dust mist particle inertia separation area); meanwhile, the ejected small amount of dust-containing airflow at the lower part is easily subjected to the influence of negative pressure airflow near the dust inlet 111 (dust mist particle inertia resistance area), so that the dust in the part of dust-containing airflow is hindered from colliding with the water mist to the collision area, and is difficult to collide with the water mist in the collision area, but is diffused to the dust inlet 111 again under the influence of negative pressure.
In addition, according to the predetermined difference, in the embodiment, the flowing speed of the dust-containing gas in the lower negative pressure region is preferably in the range of 0.8-1.2m/s, and the speed at the negative pressure inlet is preferably in the range of 3m/s, so that the spraying speed of the dust-containing gas from the spraying outlet can be ensured to be more than 60m/s, and the spraying speed of the water mist is in the range of 25-35m/s, which can lead to better dust collection effect of the water mist.
In addition, the air pressure of the negative pressure fan is more than or equal to 2000Pa, so that the spraying speed of the dust-containing gas can be ensured, and the effect of water mist collection can be ensured.
Results of the experiments
The whole opposite spraying dust removing system 1 provided by the embodiment is compared with the spraying device 200 provided by the embodiment (equivalent to the prior art), and the dust removing effect of the tunnel in construction at a certain position is compared.
The process is as follows:
step 1, arranging the operation process of a dust spraying and removing system 1, adjusting the dust-containing airflow and the water mist spraying angle to ensure a certain collision area, then starting to produce dust, and after blasting and producing dust for 30 seconds, firstly carrying out dust concentration detection before dust removal on 3 different collection points;
step 2, after the dust collection spraying device 100 and the spraying device 200 are both started for 10 minutes, stopping dust production and dust removal operation, and performing concentration detection after dust removal again at the same collection point as the step 1;
and 3, after the interval of half an hour, repeating the step 1, after the step 1 is finished, repeating the process of the step 2, only starting the spraying equipment 200 at the moment, and adjusting the spraying angle according to the actual situation so as to realize good coverage of the raised dust.
The records are shown in table 1.
Wherein,
the collection point 1 is positioned at the entrance of the tunnel by 30 meters;
the collection point 2 is positioned at the entrance of the tunnel by 100 meters;
the collection point 3 is located 180 meters at the tunnel entrance.
It can be seen from table 1 that, the dust removal system 1 provided by this embodiment removes dust by absorbing and spraying dust and colliding with water mist, compared with the prior art that only spray dust removal is adopted, the same dust generation space and concentration are ensured, and the dust removal effect is improved on the premise of ensuring the best dust removal and collection respectively, and most importantly, after the dust removal of the dust removal system 1 provided by this embodiment, the dust concentration after dust removal is far less than the standard of 20mg/m3In the prior art, only a spray dust removal mode is adopted, and the dust concentration after dust removal can not reach the standard far away.
Examples effects and effects
According to the opposite-spraying dust removing system provided by the embodiment, the dust spraying device for sucking the dust-containing gas to be subjected to dust removing treatment and spraying the sucked dust-containing gas and the spraying device provided with the spraying head for spraying and forming water mist to perform dust removing treatment on the dust-containing gas are included, and the collision area is formed between the motion track of the sprayed dust-containing gas and the motion track of the water mist, so that the possibility of collision between the dust-containing gas and the water mist is ensured, meanwhile, the preset difference value is formed between the air flow motion speed of the sprayed dust-containing gas and the water mist motion speed of the water mist, and the motion track of at least one of the dust-containing gas or the water mist is not easily influenced by the air flow around caused by the motion of the dust-containing gas and the water mist, so that certain inertia linear motion can be ensured as far as possible, therefore, more dust-containing gas and the water mist can be contacted in the collision area and can be ensured to be more fully collided as far as possible, and further, the capacity of the water mist for capturing dust-containing gas is improved, so that the dust settling and removing effect of the water mist on the dust-containing gas is enhanced.
Claims (16)
1. A dust suction/ejection apparatus for sucking dust-containing gas to be dust-removing-treated in a closed or semi-closed space by negative pressure and forming a pair of water mist ejection to a spraying apparatus to let the water mist catch to complete the dust-removing treatment, comprising:
the dust collection part is provided with a dust inlet, a dust collection pipeline and a dust outlet;
at least one injection part, wherein the injection part is provided with an injection inlet, an injection pipeline and an injection outlet, and the injection inlet is communicated with the dust outlet; and
at least one negative pressure fan which is respectively in one-to-one correspondence with at least one of the jetting parts, the negative pressure fan being installed at the jetting outlet of the jetting part corresponding thereto,
the dust-containing gas is sucked from the dust inlet through the negative pressure generated by the negative pressure fan and then is sprayed out from the spraying outlet,
and a collision area is arranged between the motion trail of the sprayed dust-containing gas and the motion trail of the water mist, and a preset difference value is arranged between the airflow motion speed of the sprayed dust-containing gas and the water mist motion speed of the water mist.
2. The suction jet apparatus as set forth in claim 1, wherein:
wherein the predetermined difference is greater than or equal to 35 m/s.
3. The suction jet apparatus as set forth in claim 1, wherein:
wherein, the dust inlet is provided with a plurality of splitter plates side by side at intervals along the direction vertical to the trend of the dust absorption pipeline.
4. A dust-suction spraying apparatus according to any one of claims 1 to 3, characterized in that:
wherein, the dust blocking curtain is vertically arranged in the dust absorption pipeline along the trend of the dust absorption pipeline.
5. The suction jet apparatus as set forth in claim 4, wherein:
wherein, the dust blocking curtain is prepared by adopting an electrostatic material.
6. The suction jet apparatus as set forth in claim 1, wherein:
the width of the dust inlet is matched with the width of the closed or semi-closed space, and the height of the dust inlet is half of the height of the closed or semi-closed space which can be covered from the lower edge of the dust inlet to the upper part.
7. The dust suction and spray apparatus as claimed in any one of claims 1 to 3 or 6, wherein:
wherein the semi-closed space is a tunnel.
8. A twin-blast dedusting system for performing dedusting treatment by collecting dust-laden gas to be dedusted in a closed or semi-closed space with water mist, comprising:
a spraying device for forming a water mist;
a dust-collecting spraying device for absorbing the dust-containing gas to be dedusted by negative pressure and spraying the water mist to capture the water mist to complete the dedusting treatment,
wherein the dust suction and injection apparatus is the dust suction and injection apparatus of any one of claims 1 to 7.
9. The cross-blast dust removal system of claim 8, wherein:
wherein the spraying equipment is provided with a water supply device and a spraying device,
the water supply device provides water for spraying,
the spraying device receives the water for spraying to form the water mist,
the spraying device has at least one spray former which forms the water mist from the received spray water.
10. The opposite-spraying dust removing system as set forth in claim 8 or 9, wherein:
wherein the flowing speed of the dust-containing gas in the lower negative pressure area of the closed or semi-closed space is 0.8-1.2m/s, the speed at the negative pressure inlet of the dust-absorbing injection equipment is 3m/s, the ejection speed of the dust-containing gas ejected from the ejection outlet is more than 60m/s, and the ejection speed of the water mist is 25-35 m/s.
11. The opposite-spraying dust removing system as set forth in claim 8 or 9, wherein:
wherein, the wind pressure of the negative pressure fan is more than or equal to 2000 Pa.
12. The cross-blast dust removal system according to claim 8 or 9, further comprising:
a moving device which is provided with a roller supporting frame used for moving and supporting and a supporting plate arranged on the roller supporting frame,
the spraying device and the dust suction spraying device are correspondingly arranged on the supporting plate along the length direction of the supporting plate.
13. The cross-blast dusting system of claim 12 further comprising:
and the power supply equipment is arranged on the supporting plate and used for supplying power to the spraying equipment and the dust absorption spraying equipment.
14. The cross-blast dust extraction system of claim 13, further comprising:
and the electric control cabinet is arranged on the supporting plate and used for controlling the operation of the spraying equipment and the dust absorption spraying equipment.
15. The cross-blast dusting system of claim 14 further comprising:
a control panel which is used for controlling the operation of the electronic device,
the mobile device is a truck, and the control panel is arranged in a cab of the truck.
16. The cross-blast dust removal system of claim 15, wherein:
wherein a portion of the front end of the support plate, on which the dust suction and spray device is provided, extends forward along the inside of the cab, and the spray device is correspondingly provided on a portion near the rear end of the support plate,
the power supply equipment and the electric control cabinet are sequentially arranged between the dust absorption spraying equipment and the spraying equipment.
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| CN201910527880.0A CN110180291B (en) | 2019-06-18 | 2019-06-18 | Dust collection and injection equipment and opposite spraying dust removal system comprising same |
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| CN201910527880.0A CN110180291B (en) | 2019-06-18 | 2019-06-18 | Dust collection and injection equipment and opposite spraying dust removal system comprising same |
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| CN110180291B CN110180291B (en) | 2024-05-17 |
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Cited By (1)
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| CN110180291B (en) | 2024-05-17 |
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Denomination of invention: Vacuum spraying equipment and its corresponding spray dust removal system Granted publication date: 20240517 Pledgee: China Construction Bank Corporation Shanghai Pilot Free Trade Zone Branch Pledgor: POTA ENVIRONMENTAL PROTECTION TECHNOLOGY (SHANGHAI) Co.,Ltd. Registration number: Y2024980037008 |
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