CN211486975U - Water mist dust removal system for casting workshop - Google Patents
Water mist dust removal system for casting workshop Download PDFInfo
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- CN211486975U CN211486975U CN201921647169.0U CN201921647169U CN211486975U CN 211486975 U CN211486975 U CN 211486975U CN 201921647169 U CN201921647169 U CN 201921647169U CN 211486975 U CN211486975 U CN 211486975U
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Abstract
The utility model belongs to environmental protection machinery discloses a water smoke dust pelletizing system for casting shop, produce the module and air exhaust the module including the water smoke curtain, the water smoke curtain produces the smoke and dust that the module is used for producing water smoke curtain separation casting shop and gives off and reduces the smoke and dust temperature, the module of airing exhaust is used for taking away the smoke and dust of being kept apart by water smoke curtain production module. The utility model discloses the effectual separation of water smoke curtain that forms has distinguished smoke and dust and outside air, can effectively reduce the smoke and dust and spill outside from the casting bed side, does not influence the technology operation, and the water smoke of formation and the smoke and dust effect that gives off can improve the entrapment efficiency of accepting the cover.
Description
Technical Field
The utility model belongs to environmental protection machinery, concretely relates to water smoke dust pelletizing system for casting shop.
Background
The existing flue gas trapping system of a factory has good trapping efficiency on most smoke point sources around the submerged arc furnace, but smoke is still dissipated and discharged when refined ferromanganese is poured into a casting mould, and the side surface of a casting bed needs to be opened so that a loader can enter to shovel away solidified alloy ingots due to the large exposed metal surface area. The smoke is therefore susceptible to cross-flow interference, causing the smoke to contaminate the exterior area. These fumes contain fine manganese oxides, in particular Mn3O4It is easily carried away by air because of its small particle size. When the metal smelting is carried out for a long time, the metal smelting works in an environment with high fine particle dust content, and the probability of diseases such as cancer, pneumonia, Chronic Obstructive Pulmonary Disease (COPD) and other respiratory and cardiovascular syndromes is high. Inhalation of certain manganese compounds can also cause inflammation and neuropsychological disorders. Therefore, the escape of smoke dust in a casting workshop is reduced, and the physical and psychological health of workers is guaranteed.
Disclosure of Invention
In order to solve among the prior art concise ferromanganese smoke and dust loss when pouring into casting die to harm the operation workman healthy, the utility model provides a water smoke dust pelletizing system for casting workshop adopts following technical scheme to realize:
a water mist dust removal system for a casting workshop comprises a water mist curtain generation module and an exhaust module, wherein the water mist curtain generation module is used for generating a water mist curtain to block smoke dust emitted by the casting workshop and reduce the temperature of the smoke dust, and the exhaust module is used for pumping away the smoke dust separated by the water mist curtain generation module;
the exhaust module comprises an exhaust hood, an exhaust pipe, air ports and a fan, the exhaust hood is arranged in a casting workshop, the exhaust pipe comprises a front section and a rear section, the front section of the exhaust pipe is arranged in the exhaust hood and is divided into n pipe sections according to the number n of casting molds contained in the casting workshop, a plurality of air ports are arranged on each pipe section, the total area of the air ports of different pipe sections is different, and the rear section of the exhaust pipe is connected with the fan;
the water mist curtain generation module comprises a water storage tank, a high-pressure water pump and a high-pressure water supply pipe, the high-pressure water supply pipe comprises a water spraying section and a water transporting section, the water transporting section is sequentially connected with the water storage tank and the high-pressure water pump, a water quantity control valve is arranged in the water spraying section before a plurality of nozzles are arranged, and the water spraying section is arranged on an air exhaust cover of the air exhaust module.
Furthermore, the number n of casting molds in the casting workshop is 4, the front section of the exhaust pipe is divided into 4 pipe sections, and the total area of air ports of the 4 pipe sections is sequentially increased from left to right.
Furthermore, the angle of the water sprayed by the spray head is alpha, and the value range of the alpha is {25,45,65,80 and 110 }.
Furthermore, a turning part of the exhaust pipe is internally provided with a guide vane.
Furthermore, the water mist curtain generation module further comprises two filters, and the two filters are respectively installed at the water inlet end of the water storage tank and the water outlet end of the water storage tank.
Further, the water mist curtain generation module further comprises a pressure gauge, and the pressure gauge is installed in front of the high-pressure water pump.
Furthermore, the fan and the exhaust pipe are in soft connection.
Further, the exhaust hood includes left plate, right plate, side roof and front bezel, left plate, right plate and front bezel perpendicular to ground, the side roof is 60 and the lower edge connection front bezel of side roof with the vertical direction contained angle.
The utility model discloses still have following beneficial effect:
(1) the formed water mist curtain effectively blocks a smoke dust area and outside air, can effectively reduce the smoke dust from escaping to the outside from the side surface of the casting bed, and does not influence the process operation.
(2) The formed water mist and the emitted smoke act to improve the collecting efficiency of the receiving cover.
(3) The formed water mist curtain can reduce the high-temperature environment of a workshop, isolate the high-temperature casting process and improve the working environment of workers.
(4) The strip seam type air ports arranged at different intervals on the exhaust pipe can ensure that the speed of the air ports is uniform, and prevent uneven air distribution of the front section and the rear section of the air pipe and the control effect of the receiving cover from being deteriorated.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a geometric model of a casting shop;
FIG. 3 is a schematic diagram of a water mist generation module;
FIG. 4 is a schematic structural view of an exhaust module;
FIG. 5 is a schematic view showing the process of meeting, adsorbing and falling the soot and water drops;
the meaning of the reference symbols in the drawings is:
1-an exhaust hood, 2-an exhaust pipe, 3-an air port, 4-a fan, 5-a water storage tank, 6-a high-pressure water pump, 7-a high-pressure water supply pipe, 8-a water quantity control valve, 9-a spray head, 10-a left wall, 11-a right wall, 12-a roof, 13 filters, 14-a pressure gauge, 16-a guide vane, 17-an air quantity adjusting valve, 18-a soft joint, 19-a water mist dedusting host, 20-a pouring bed and 21-a pouring mold;
101-left panel, 102-right panel, 103-side top panel, 104-front panel.
Detailed Description
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means that the terms are defined with reference to the drawing plane of the corresponding drawing, and "inner" and "outer" mean that the terms are inner and outer relative to the outline of the corresponding part.
Firstly, the technical terms appearing in the utility model are explained:
on-way resistance: when fluid flows through a straight pipe with a certain pipe diameter, the resistance is generated due to the internal friction of the fluid, and the resistance is in direct proportion to the path length.
Local resistance: when fluid passes through pipe fittings and valves in pipelines, the energy loss is caused by vortex generated by boundary layer separation due to local obstacles such as diameter change, direction change and the like.
As shown in fig. 2, the geometric model of the casting shop is shown, the ferromanganese casting shop is composed of a left wall 10, a right wall 11 and a roof 12, the front side is open, so that a forklift can enter and shovel alloy ingots after metal cooling in the later period, the front side is open due to process requirements and is easily interfered by transverse airflow, high-temperature smoke generated by casting can overflow from the open front side, and the trapping effect of an upper exhaust hood is poor.
Example 1
The embodiment discloses a water mist dust removal system for a casting workshop, which comprises a water mist curtain generating module and an exhaust module, wherein the water mist curtain generating module is used for generating a water mist curtain to block smoke dust emitted from the casting workshop and reduce the temperature of the smoke dust, and the exhaust module is used for pumping away the smoke dust separated by the water mist curtain generating module;
the exhaust module comprises an exhaust hood 1, an exhaust pipe 2, air ports 3 and a fan 4, the exhaust hood 1 is arranged in a casting workshop, the exhaust pipe 2 comprises a front section and a rear section, the front section of the exhaust pipe 2 is arranged in the exhaust hood 1 and is divided into n pipe sections according to the number n of casting molds contained in the casting workshop, a plurality of air ports 3 are arranged on each pipe section, the total area of the air ports of different pipe sections is different, and the rear section of the exhaust pipe 2 is connected with the fan 4;
the water smoke curtain produces the module and includes storage water tank 5, high pressure water pump 6 and high pressure feed pipe 7, high pressure feed pipe 7 includes watering section and fortune water section, the fortune water section connects gradually storage water tank 5 and high pressure water pump 6, be provided with a plurality of shower nozzles 9 in the watering section and be provided with water yield control valve 8 before every shower nozzle 9, the watering section is installed on the exhaust hood 1 of the module of airing exhaust.
Specifically, the cross-sectional area F of the exhaust duct 2 is defined by
Is obtained by calculation, wherein Q0The exhaust air volume of the casting shop is shown, and v represents the average air speed in the exhaust duct 2. And then the length of the exhaust pipe 2 is obtained through the length of a pouring workshop.
Specifically, the calculation of the total area of the tuyere 3 of the different tube sections comprises the following substeps:
step a: calculating the wind speed of a wind gap in each pipe section;
step b: and obtaining the total area of the tuyere of each pipe section by utilizing the air discharge quantity of each pipe section and the tuyere wind speed in each pipe section. When the sum of the local resistance and the on-way resistance of each pipe section is equal, the air quantity distribution of each pipe section is uniform, and the air speed of the air inlet is equal.
Preferably, the tuyere wind speed in each pipe section in the step a is obtained by the following steps:
calculating the local resistance and the on-way resistance of all the pipe sections by using the formula I and the formula II, and then obtaining the corresponding wind speed of the wind inlet in each pipe section when the sum of the local resistance and the on-way resistance of each pipe section is equal;
wherein, PiDenotes the local resistance of the ith tube segment, ξiRepresents the local drag coefficient of the ith pipe section and
viwind speed of tuyere representing the ith tube section, CiDenotes viThe ratio of the average wind speed v to the average wind speed v of the exhaust pipe, wherein rho represents the air density;
Pmi＝Ri*Liformula II
Wherein, PmiDenotes the on-way resistance, R, of the ith pipe sectioniDenotes the specific friction resistance, L, of the ith tube sectioniIndicating the length of the ith tube segment.
Preferably, the total area of the tuyere of each tube section in the step b is obtained by the following method:
by using
Obtaining the total tuyere area f of the ith tube sectioniWherein Q represents the exhaust air volume of each pipe section and
Q0indicating the amount of air venting from the casting plant.
Specifically, the number N of the spray heads 9 is
The length of the front plate of the exhaust hood is obtained, wherein L represents the length of the front plate of the exhaust hood, α represents the atomization angle of the spray head, and α represents the value range of {25,45,65,80 and 110 }.
Specifically, when the water mist sprayed by the spray head meets high-temperature flue gas, the water mist is vaporized into water vapor to take away latent heat of vaporization and reduce the temperature of the surrounding flue gas, and the water mist is continuously mixed with the flue gas; the water spraying amount of the nozzle 9 is obtained by using the formula III:
wherein the content of the first and second substances,
indicates the amount of water sprayed, T, from all the nozzles0Denotes the initial temperature, T, of the hot air1Denotes the cooling temperature of the high-temperature air, hgas(T0) Denotes the temperature T0Enthalpy of flue gas, hgas(T1) Denotes the temperature T1The enthalpy value of the smoke is measured,
denotes the enthalpy, T, of the water vapour3Which is indicative of the temperature of the liquid water,
denotes the temperature T3The enthalpy of the liquid water.
Specifically, the fan 4 provides power for the whole exhaust system, the fan 4 and the exhaust pipe 2 are in soft connection 18, the purpose is noise elimination and shock absorption, the installation and the maintenance are convenient, the exhaust pipe 2 is provided with an air volume adjusting valve 17, and all exhaust pipe sections are connected through flanges.
Specifically, a guide vane 16 is arranged in the turning of the exhaust duct 2, and is used for preventing the air from generating vortex at the sharp turning part to cause unsmooth airflow and loss of energy to generate noise.
Specifically, the water mist curtain generation module further comprises two filters 13, and the two filters 13 are respectively installed at the water inlet end of the water storage tank 5 and the water outlet end of the water storage tank 5. The water from the water source is first filtered by a filter 13 to prevent clogging of the spray head at the rear, the filtered water is stored in the storage tank 5 and the other filter 13 is used to filter the water from the storage tank 5 a second time.
Specifically, the water mist curtain generation module further comprises a pressure gauge 14, and the pressure gauge 14 is installed in front of the high-pressure water pump 6 and used for monitoring the pressure of the water inlet end of the high-pressure water pump 6.
The utility model discloses a working process does:
before casting begins, the model design module designs the sizes of components in the water mist curtain generation module and the exhaust module according to the size and the dust removal requirement of a casting workshop, the water mist dust removal host 19 is opened when casting begins, then the host controls the high-pressure water pump 6 to be opened, water at a water source enters the water storage tank 5 after being filtered by the filter 13, the water storage tank 5 can form buffering between the high-pressure water pump 6 and the high-pressure water supply pipe 7, and the high-pressure water pump 6 is prevented from being damaged when insufficient water is supplied. The opening of the high-pressure water pump 6 and the water pressure and the water quantity in the pipeline are controlled by a pressure regulating valve, an electromagnetic valve and the like which are integrated in the water mist dust removal. The water mist sprayed out of the spray head 9 can form a water mist curtain between the casting workshop and the external environment, so that the inside and the outside air are isolated, a large amount of smoke generated on the casting bed can collide with the water mist generated by the spray head 9, and then is condensed and settled, or is sucked away by an air port above the receiving cover. Due to the action of the water curtain, smoke dust cannot escape from the open side face, the existence of the water curtain can reduce the high-temperature environment of a workshop, isolate the high-temperature casting process and improve the trapping efficiency of a dust removal system. When no smoke dust is emitted basically after the alloy ingot is cooled, the high-pressure water pump 6 is closed through the water mist dust removal host 19, and the spray head 9 stops spraying; the loader enters to scoop away the solidified alloy ingot. The water mist dust removal system complies with the principle of 'early on and late off'.
Example 2
The embodiment discloses a water smoke dust pelletizing system for pouring workshop, on embodiment 1's basis, still discloses following technical characteristic:
in the present embodiment, four casting molds emitting high-temperature smoke are arranged below the exhaust hood 1, and the side length of the molds is 2 meters. The tuber pipe distance is longer, and the on-way resistance is big more, can reduce along with the increase amount of wind of tuber pipe distance by a wide margin, leads to the exhaust pipe front and back section amount of wind distribution inhomogeneous, leans on the speed of airing exhaust after more and reduces, does not reach the design amount of airing exhaust, consequently, often has the high temperature smoke and dust effect that exhaust hood 1 control first casting die utensil gived off fine, and the later condition that the effect is worse more. Aiming at the problem, in the embodiment, the exhaust duct 2 is divided into four sections, the four sections are provided with strip seam type air ports with different intervals, the L1 has the densest strip seam and the largest local resistance, the L4 has the most sparse strip seam and the smallest local resistance, and the exhaust speed of each part of the exhaust duct is uniform by using the method;
the water spraying amount required by the water spray curtain generating system is illustrated by four casting dies with side length W in the embodiment, and the smoke generation amount of the four dies is 4V0W2When the collecting efficiency of the upper hood 1 is η (assumed to be 70% in the present embodiment) without the mist curtain, there will be (1- η) × 4V0W2The high-temperature smoke and dust overflows from the open front side, so the water mist curtain needs to restrain the smoke and dust, the temperature of the high-temperature smoke and dust is 600 ℃, the water mist is sprayed and then cooled to the ambient temperature of 30 ℃, the temperature of the water source is 20 ℃ in the embodiment, and the enthalpy value h of the high-temperature smoke and dust can be obtained by checking an enthalpy-humidity diagram or formula calculationgas(600 ℃), and the enthalpy value h of the cooled smokegas(30 ℃), vapor enthalpy
Enthalpy of water source
High temperature of overflowThe smoke amount is (1- η) × 4V0W2Therefore, the amount of water required by the water mist dust suppression system in the embodiment can be calculated by the formula III
In fig. 1, the length D of the front panel 104 of the hood should be greater than NW + (N-1) D (D is the distance between the casting molds, N is the number of casting molds), in this embodiment, 1.2(4W +3D) is 11.4 m, the height E is 0.5m, the distance F between the front panel 104 of the hood and the rear wall should be greater than W, in this embodiment, 1.5W is 3m, and the angle between the top panel 103 of the hood side and the vertical direction is 60 °. In the embodiment, the exhaust duct is divided into four sections of L1, L2, L3 and L4, the initial speed of smoke dust in each mold is 5m/s, and the exhaust amount of the exhaust system is 4V0W2*2＝160m3The air quantity of each section of exhaust pipe is 2V (2 is a safety factor)0W2＝40m3And s. The wind speed in the exhaust pipe is selected to be 18m/s, and the sectional area F of the exhaust pipe is 8.55m2And the size of the air pipe is selected to be 3m by 3 m. The wind speed of the L4 strip-shaped tuyere is 7m/s, the wind speeds of the L1-L4 strip-shaped tuyere are 8.96,8.44 and 8.03m/s respectively, and the areas of the strip-shaped tuyere are 4.46 m/s respectively2,4.74m2,4.98m2,5.71m2. The water amount required by the water mist dust suppression system in the embodiment is
Claims (8)
1. A water mist dust removal system for a casting workshop is characterized by comprising a water mist curtain generation module and an exhaust module, wherein the water mist curtain generation module is used for generating a water mist curtain to block smoke dust emitted from the casting workshop and reduce the temperature of the smoke dust, and the exhaust module is used for pumping away the smoke dust separated by the water mist curtain generation module;
the exhaust module comprises an exhaust hood (1), an exhaust pipe (2), air ports (3) and a fan (4), the exhaust hood (1) is arranged in a casting workshop, the exhaust pipe (2) comprises a front section and a rear section, the front section of the exhaust pipe (2) is arranged in the exhaust hood (1) and is divided into n pipe sections according to the number n of casting molds (21) in the casting workshop, a plurality of air ports (3) are arranged on each pipe section, the total areas of the air ports of different pipe sections are different, and the rear section of the exhaust pipe (2) is connected with the fan (4);
the water mist curtain generation module comprises a water storage tank (5), a high-pressure water pump (6) and a high-pressure water supply pipe (7), the high-pressure water supply pipe (7) comprises a sprinkling section and a water transporting section, the water transporting section is sequentially connected with the water storage tank (5) and the high-pressure water pump (6), a water quantity control valve (8) is arranged in front of the sprinkling section, which is provided with a plurality of nozzles (9) and each nozzle (9), and the sprinkling section is installed on an exhaust hood (1) of the exhaust module.
2. The water mist dedusting system for the casting shop according to claim 1, characterized in that the casting shop comprises 4 casting molds (21), the front section of the exhaust duct (2) is divided into 4 duct sections, and the total area of the air ports of the 4 duct sections increases from left to right.
3. A water mist dusting system for a casting plant according to claim 1, characterized in that the angle of water spray from the spray head (9) is α and α e {25,45,65,80,110 }.
4. The water mist dedusting system for casting plants as claimed in claim 1, characterized in that guide vanes (16) are arranged in the turning of the exhaust duct (2).
5. The water mist dedusting system for the casting shop as claimed in claim 1, characterized in that the water mist curtain generating module further comprises two filters (13), the two filters (13) being respectively installed at the water inlet end of the water storage tank (5) and the water outlet end of the water storage tank (5).
6. The water mist dedusting system for the casting shop as claimed in claim 1, characterized in that the water mist curtain generating module further comprises a pressure gauge (14), the pressure gauge (14) being installed before the high pressure water pump (6).
7. The water mist dedusting system for casting plants as claimed in claim 1, characterized in that a soft joint (18) is used between the fan (4) and the exhaust duct (2).
8. The water mist dust removing system for the casting shop according to claim 1, characterized in that the hood (1) comprises a left plate (101), a right plate (102), a side top plate (103) and a front plate (104), the left plate (101), the right plate (102) and the front plate (104) are perpendicular to the ground, the side top plate (103) forms an angle of 60 degrees with the vertical direction, and the lower edge of the side top plate (103) is connected with the front plate (104).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921647169.0U CN211486975U (en) | 2019-09-29 | 2019-09-29 | Water mist dust removal system for casting workshop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921647169.0U CN211486975U (en) | 2019-09-29 | 2019-09-29 | Water mist dust removal system for casting workshop |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110613996A (en) * | 2019-09-29 | 2019-12-27 | 西安建筑科技大学 | Self-adaptive water mist dust removal system for casting workshop |
| CN112974095A (en) * | 2021-02-06 | 2021-06-18 | 秦皇岛北方管业有限公司 | Atomizing dust-settling device for curtain-shaped spraying |
-
2019
- 2019-09-29 CN CN201921647169.0U patent/CN211486975U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110613996A (en) * | 2019-09-29 | 2019-12-27 | 西安建筑科技大学 | Self-adaptive water mist dust removal system for casting workshop |
| CN110613996B (en) * | 2019-09-29 | 2023-04-18 | 西安建筑科技大学 | Self-adaptive water mist dust removal system for casting workshop |
| CN112974095A (en) * | 2021-02-06 | 2021-06-18 | 秦皇岛北方管业有限公司 | Atomizing dust-settling device for curtain-shaped spraying |
| CN112974095B (en) * | 2021-02-06 | 2022-03-18 | 秦皇岛北方管业有限公司 | Atomizing dust-settling device for curtain-shaped spraying |
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