Powder solution preparation system with dust removal function

Abstract

The utility model discloses a powder solution preparation system with a dust removal function, which is characterized in that a spray box is arranged at the top of a preparation tank, a Venturi injection mechanism is respectively connected with the spray box and a dust collection box, the bottom of the dust collection box is connected with a collection pool through a blow-off pipe, and the top of the dust collection box is connected with the collection pool through an exhaust pipe; the spraying box is used for cooling and flushing steam containing dust generated in the preparation tank, the venturi injection mechanism is used for injecting the cooled and dustfall steam into the dust collecting box, the dust collecting box is used for collecting escaping dust, and the high-pressure flushing mechanism is used for regularly flushing the dust collecting box at high pressure. Waste liquid generated by flushing is discharged into the collecting tank under the action of gravity, and meanwhile, gas in the dust collecting box is also discharged into the collecting tank. The device has the characteristics of simple principle, convenience in operation, wide application range and the like, and effectively avoids the problem that the powder blanking efficiency is reduced due to the fact that a large amount of hot steam is generated in the preparation tank when a powder solution is prepared.

Description

Technical Field

[0001] This utility model relates to the field of lime slurry preparation technology, specifically to a powder solution preparation system with dust removal function. Background Technology

[0002] Powder solution preparation tanks are used in the power and chemical industries, such as lime slurry preparation systems. The materials are quicklime powder or hydrated lime powder mixed with water. During the preparation of lime slurry, heat is released and a large amount of steam is generated, which causes the preparation tank to be under positive pressure, affecting the feeding efficiency of lime materials.

[0003] The mainstream process in existing lime slurry preparation systems involves adding a wet dust collection device to the top of the lime slurry preparation tank. This device mainly consists of a spray dust collection unit and a centrifugal fan as an exhaust fan. This system suffers from poor dust collection efficiency, dust being ejected from the exhaust fan and polluting the site, and a high equipment failure rate, increasing the workload for maintenance personnel. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a powder solution preparation system with dust removal function that is simple in principle, convenient to operate and has a wide range of applications.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A powder solution preparation system with dust removal function includes: a preparation tank, a spray box, a Venturi spray mechanism, a dust collection box, and a collection pool; the spray box is located on top of the preparation tank, the Venturi spray mechanism is connected to both the spray box and the dust collection box, the dust collection box is equipped with a timed high-pressure rinsing mechanism, the bottom of the dust collection box is connected to the collection pool via a drain pipe, and the top of the dust collection box is connected to the collection pool via an exhaust pipe; the spray box is used to cool and rinse the dust-containing vapor generated in the preparation tank, the Venturi spray mechanism is used to spray the cooled and dust-suppressed vapor into the dust collection box, the dust collection box is used to collect the emitted dust, the high-pressure rinsing mechanism rinses the dust collection box at regular intervals, and the gas in the dust collection box and the waste liquid generated during rinsing are discharged into the collection pool.

[0007] As a further improvement of this utility model, the spray box is provided with atomizing nozzles and baffles; the atomizing nozzles are located below the baffles and are connected to industrial water pipes; multiple baffles are alternately arranged inside the spray box.

[0008] As a further improvement of this utility model, the Venturi spraying mechanism includes a fan, a Venturi injector, an air outlet pipe, an air supply pipe, and a spray pipe; the air inlet of the Venturi injector is connected to the spray box and the fan respectively through the air outlet pipe and the air supply pipe, and the air outlet of the Venturi injector is connected to the bottom of the dust collection box through the spray pipe.

[0009] As a further improvement of this utility model, the high-pressure flushing mechanism includes multiple high-pressure nozzles connected to industrial water pipes to achieve timed flushing of the inside of the dust collection box.

[0010] As a further improvement of this utility model, the industrial water pipe is equipped with a solenoid valve and a manual valve. The solenoid valve is connected to an external control system, and the manual valve is in a normally open state.

[0011] As a further improvement of this utility model, the dust collection box is provided with an inspection door on the side.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] This utility model discloses a powder solution preparation system with dust removal function. By placing a spray box on top of the preparation tank, connecting a Venturi jetting mechanism to both the spray box and the dust collection box, and connecting the bottom and top of the dust collection box to a collection pool via corresponding pipes, a compact and completely enclosed powder solution preparation system is formed. The spray box cools and flushes the dust-containing steam generated in the preparation tank before venting it outwards. This prevents high-temperature steam from accumulating in the preparation tank and hindering powder feeding, and also reduces the impact of high-temperature steam on subsequent equipment. The Venturi jetting mechanism ensures that the cooled and dust-suppressed steam is promptly injected into the dust collection box, preventing steam accumulation in the spray box. The dust-laden gas in the preparation tank is buffered by a dust collection box. Trace amounts of dust settle into the dust collection box under gravity, while the gas is discharged from the top of the dust collection box into a collection pool. Simultaneously, a high-pressure rinsing mechanism periodically rinses the dust collection box, and the waste liquid generated during rinsing is discharged into the collection pool under gravity. Finally, qualified gas escapes directly from the collection pool into the atmosphere. This powder solution preparation system avoids dust pollution in the solution preparation workshop environment while ensuring smooth powder feeding into the preparation tank, effectively preventing the reduction of powder feeding efficiency due to the generation of large amounts of hot steam inside the preparation tank during powder solution preparation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structural principle of a powder solution preparation system with dust removal function in a specific embodiment of this utility model.

[0015] Legend: 1. Preparation tank; 2. Spray box; 3. Fan; 4. Venturi injector; 5. Dust collection box; 6. Collection pool; 7. Atomizing nozzle; 8. Air outlet pipe; 9. Air supply pipe; 10. Spray pipe; 11. Inspection door; 12. High-pressure nozzle; 13. Sewage pipe; 14. Exhaust pipe; 15. Solenoid valve; 16. Manual valve; 17. Baffle plate. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention.

[0017] In the description of this utility model, it should be understood that the terms "side", "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0019] Example

[0020] like Figure 1As shown, the dust removal powder solution preparation system of this utility model includes: a preparation tank 1, a spray box 2, a Venturi spray mechanism, a dust collection box 5, and a collection pool 6. The preparation tank 1 is equipped with a powder discharge port and an industrial water inlet. The powder and industrial water are stirred evenly within the preparation tank 1 to obtain a powder solution. The spray box 2 is located at the top of the preparation tank 1. The Venturi spray mechanism is connected to both the spray box 2 and the dust collection box 5. The bottom of the dust collection box 5 is connected to the collection pool 6 via a drain pipe 13, and the top of the dust collection box 5 is connected to the collection pool 6 via an exhaust pipe 14. The dust collection box 5 is equipped with a high-pressure rinsing mechanism. The spray box 2 is used to cool and rinse the dust-containing steam generated in the preparation tank 1. The Venturi spray mechanism, through the strong suction of its negative pressure chamber, sprays the cooled and dust-reduced steam into the dust collection box 5. The dust collection box 5 is used to collect the dust that escapes. The dust collection box 5 is periodically flushed by a high-pressure flushing mechanism that is opened and closed at a time. The waste liquid generated by the flushing is discharged into the collection pool 6 under the action of gravity. The gas discharged from the top of the dust collection box 5 is also collected into the collection pool 6.

[0021] In this embodiment, by setting the spray box 2 on top of the preparation tank 1, connecting the venturi spray mechanism to the spray box 2 and the dust collection box 5 respectively, and connecting the bottom and top of the dust collection box 5 to the collection pool 6 through corresponding pipes, a compact and completely closed powder solution preparation system is formed. The spray box 2 cools and washes the dust-containing steam generated in the preparation tank 1 before it is discharged. This avoids the accumulation of high-temperature steam in the preparation tank 1, which would hinder the powder feeding, and also reduces the impact of high-temperature steam on subsequent equipment. The Venturi jet mechanism ensures that the cooled steam is promptly injected into the dust collection box 5, preventing steam from accumulating in the spray box 2 and the preparation tank 1 and affecting the powder feeding into the preparation tank 1. The dust collection box 5 buffers the dust-containing gas, and trace amounts of dust settle into the dust collection box 5 under gravity. The gas is discharged from the top of the dust collection box 5 into the collection pool 6. At the same time, the high-pressure flushing mechanism regularly flushes the dust collection box 5, and the waste liquid generated by the flushing is discharged into the collection pool 6 under gravity. Finally, the qualified gas directly escapes into the atmosphere from the collection pool 6. The powder solution preparation system of this utility model will not cause dust pollution in the solution preparation workshop environment, while ensuring the smooth feeding of powder in the preparation tank 1, effectively avoiding the problem of reduced powder feeding efficiency due to the generation of a large amount of hot steam inside the preparation tank 1 during powder solution preparation.

[0022] like Figure 1As shown, the spray box 2 is equipped with atomizing nozzles 7 and baffles 17. The atomizing nozzles 7 are located below the baffles 17 and are connected to industrial water pipes. Multiple baffles 17 are arranged alternately inside the spray box 2. The baffles 17 condense and capture dust-laden water droplets, while the gas is drawn into the dust collection box 5 by the Venturi jet mechanism.

[0023] like Figure 1 As shown, the Venturi jetting mechanism includes a fan 3, a Venturi jetter 4, an exhaust pipe 8, an air supply pipe 9, and a jetting pipe 10. The air inlet of the Venturi jetter 4 is connected to the spray box 2 and the fan 3 via the exhaust pipe 8 and the air supply pipe 9, respectively. The air outlet of the Venturi jetter 4 is connected to the bottom of the dust collection box 5 via the jetting pipe 10. Air is blown into the Venturi jetter 4 by the fan 3, and the Venturi jetter 4, through the strong suction of its negative pressure chamber, drives the dust-laden water vapor discharged from the spray box 2 to be promptly sprayed into the dust collection box 5.

[0024] like Figure 1 As shown, the high-pressure rinsing mechanism includes multiple high-pressure nozzles 12 connected to industrial water pipes to periodically rinse the inside of the dust collection box 5. Since the cooling steam discharged from the spray box 2 still contains a small amount of dust, the dust collection box 5 is set up to collect and buffer the dust-laden gas. Due to the large volume of the dust collection box 5, the gas flow rate decreases after being injected into it by the Venturi jet mechanism, causing the dust in the gas to settle under gravity, further improving the removal effect of the dust-laden gas and preventing dust from escaping. After a period of time, the high-pressure nozzles 12 are turned on again to rinse the inside of the dust collection box 5, improving the cleanliness of the inside of the dust collection box 5 and preventing dust from being carried out by the gas.

[0025] like Figure 1 As shown, both the industrial water pipe connecting the spray box 2 and the industrial water pipe connecting the dust collection box 5 are equipped with a solenoid valve 15 and a manual valve 16. The manual valve 16 is normally open, and the solenoid valve 15 is connected to an external control system. Automatic spraying / rinsing can be achieved by presetting the opening and closing time of the solenoid valve 15.

[0026] In this embodiment, an inspection door 11 is provided on the side of the dust collection box 5 to facilitate daily inspection and maintenance.

[0027] In this embodiment, the design principles and basis of the preparation system are as follows:

[0028] According to the classical condensation-evaporation theory, the evaporation rate is the difference between the condensation molecular flow rate and the evaporation molecular flow rate. The evaporation rate per unit area of ​​liquid surface is:

[0029]

[0030] in,

[0031] M – Molar mass of the liquid, g / mol

[0032] R—ideal gas constant, taken as 8.314 J / kg·K

[0033] p g —Vapor partial pressure, Pa

[0034] p l —Saturated vapor pressure at the liquid surface temperature, Pa

[0035] T g —Steam temperature, K

[0036] T l —Liquid temperature, K

[0037] Since the actual situation differs from the theory, an evaporation coefficient α is introduced. e and the coefficient of coagulation α c .

[0038] Its definition is

[0039] Substituting into formula (1), we get:

[0040]

[0041] In formula (2), for liquids with low volatility, the evaporation coefficient α e and the coefficient of coagulation α c They can be considered equal, with values ​​in the range of 10. -4 Between 1 and 1. Under continuous system operation, T can be considered to be... g and T l To reach equilibrium, where T g and T l Based on on-site temperature measurements, for example, T g =T l =333.15k. Vapor partial pressure p g It can be calculated based on humidity and the saturated vapor pressure at the current temperature. Consulting the enthalpy-entropy table, T... g The saturated vapor pressure at 333.15 K is 19.92 kPa. The humidity of the vapor inside preparation tank 1, measured by a field hygrometer, is φ = 93%. The partial pressure of the vapor is calculated to be p. g =p l *φ=19.92kPa*93%=18.53kPa. Substitute the calculated data into formula (2), and take α. e =α c =0.2, so the theoretical evaporation rate of steam is j = 0.2 * j 理论 =0.2*44.85g / m2 ·s=8.97g / m 2 ·s.

[0042] Based on the dimensions and parameters of the material solution preparation tank design drawings, the liquid surface area Ssurface inside the tank can be calculated. The evaporation rate inside the tank is Ssurface * j, i.e., the evaporation rate is n = Ssurface / 18 (18 is the molecular weight of H2O). Assuming the material solution preparation tank is an ideal environment with an internal pressure of 101 kPa, according to the Clapeyron equation PV = nRT, the theoretical steam extraction capacity can be calculated to be approximately V = nRT / P. The fan selection is then based on the calculated V value. It is evident that the spray box 2 and the Venturi ejector 4 are designed and manufactured according to the fan's air pressure and flow rate.

[0043] In this embodiment, during slurry preparation in the preparation tank 1, the blower 3, atomizing nozzle 7, and high-pressure nozzle 12 are activated. The atomizing nozzle 7 sprays water into the spray box 2 to wash the high-temperature steam discharged from the outlet of the preparation tank 1. The blower 3 then promptly directs the water vapor from the spray box 2 through the venturi injector 4 into the dust collection box 5. The dust-laden gas is buffered in the dust collection box 5. The high-pressure nozzle 12 periodically sprays water into the dust collection box 5 to rinse its interior. The water sprayed from the atomizing nozzle 7 washes the passing water vapor, and the baffle 17 condenses and captures the dust-laden water droplets. The dust collection box 5 buffers the dust-laden gas, and finally, the qualified gas escapes into the atmosphere from the collection pool 6. This effectively avoids the problem of blockage caused by water vapor in the feed pipe during powder slurry preparation. Furthermore, the dust content of the gas discharged after two washing processes meets emission requirements.

[0044] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A powder solution preparation system with dust removal function, characterized in that, It comprises a preparation tank (1), a spray tank (2), a Venturi injection mechanism, a dust collection tank (5) and a collection pool (6); the spray tank (2) is arranged on the top of the preparation tank (1), the Venturi injection mechanism is connected to the spray tank (2) and the dust collection tank (5) respectively, the dust collection tank (5) is provided with a high-pressure flushing mechanism with timing opening and closing, the bottom of the dust collection tank (5) is connected to the collection pool (6) through a blowdown pipe (13), the top of the dust collection tank (5) is connected to the collection pool (6) through an exhaust pipe (14); the spray tank (2) is used for cooling and flushing the steam containing dust generated in the preparation tank (1), the Venturi injection mechanism is used for injecting the cooled and dust-settled steam into the dust collection tank (5), the dust collection tank (5) is used for collecting the escaped dust, and the high-pressure flushing mechanism is used for timing flushing of the dust collection tank (5); the gas in the dust collection tank (5) and the waste liquid generated by flushing are all discharged into the collection pool (6). The spray tank (2) is internally provided with an atomizing nozzle (7) and a baffle (17); the atomizing nozzle (7) is located below the baffle (17), the atomizing nozzle (7) is connected to an industrial water pipe, and a plurality of baffles (17) are alternately arranged in the spray tank (2).

2. The powder solution preparation system with dust removal function according to claim 1, characterized in that, The Venturi injection mechanism comprises a fan (3), a Venturi injector (4), an air outlet pipe (8), a air supply pipe (9) and a injection pipe (10); the air inlet end of the Venturi injector (4) is connected to the spray tank (2) and the fan (3) through the air outlet pipe (8) and the air supply pipe (9) respectively, and the air outlet end of the Venturi injector (4) is connected to the bottom of the dust collection tank (5) through the injection pipe (10).

3. The powder solution preparation system with dust removal function according to claim 2, characterized in that, The high-pressure flushing mechanism comprises a plurality of high-pressure nozzles (12) connected to the industrial water pipe, so as to realize timing flushing of the inside of the dust collection tank (5).

4. The powder solution preparation system with a dust removal function according to claim 3, characterized in that, The industrial water pipe is provided with a solenoid valve (15) and a manual valve (16); the solenoid valve (15) is connected to an external control system, and the manual valve (16) is in a normally open state.

5. The powder solution preparation system with dust removal function according to claim 4, characterized in that, The dust collection tank (5) is provided with an access door (11) on the side.

6. The powder solution preparation system with a dust removal function according to any one of claims 1 to 5, characterized in that, ​

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