CN104190567B - A kind of activity excitant atomising device for metal tailings grinding system - Google Patents

Abstract

An active activator atomization device for metal tailings grinding system, including a spray gun welded by an inner tube and an outer tube, an air inlet ring cavity is formed between the outer tube and the inner tube, and one end of the air inlet ring cavity It is a closed end and the other end is an open end. The spray gun is installed on the connecting pipe between the vertical mill and the bag filter. The outer end of the pipe protrudes from the outer casing to form a liquid inlet; it includes a gas-liquid mixing nozzle installed on the open end of the spray gun; it includes a liquid supply system connected to the liquid inlet and an air supply system connected to the spray inlet. The device can effectively atomize and spray the active activator in the pipeline evenly, thereby better ensuring the uniform mixing with the raw material micro-powder finished product and ensuring that the active activator can be effectively attached to the particle interface of the finished micro-powder; The impact of the hot air environment in the mill on the performance of the active activator reduces its volatilization and loss; this device can also realize the adjustment and control of the amount of addition to meet different production needs.

Description

An active activator atomization device for metal tailings grinding system

technical field

The invention belongs to the field of grinding equipment for cement industry, and relates to a micropowder treatment technology. In particular, it refers to an active activator atomizing device suitable for working in a high-density dust environment in a vertical roller mill grinding system.

Background technique

Vertical mill is an energy-saving grinding equipment widely used in cement, steel, electric power and other industries. In order to ensure that the finished micropowder after the vertical mill grinds the raw materials can have a higher activity index and can be comprehensively utilized with large dosage and high added value, it is very important to control the addition method of the active activator. It is well known that the potential activation properties of materials can be fully utilized through physical excitation and chemical excitation. At this stage, the physical activity of the material is stimulated by forming a material bed of a certain thickness on the grinding table of the vertical mill, and then the grinding roller grinds the material under the driving force of the hydraulic system. The physical excitation method can significantly improve the potential activity of some type materials, but for the type materials with poor grindability and poor activity effect, material excitation alone is not enough. At present, the activity of chemically stimulated materials is simply measured manually, and then directly added dropwise to the raw materials from the top of the raw material conveying belt through the feeding pipe. The disadvantages of this method of adding active activators are: the metering method is extensive; the belt is prone to sticking; , The loss is large, which seriously affects the adhesion effect of the polymer in the active stimulant and the particle interface of the finished micro-powder, and further affects the further development of the potential activity of the finished micro-powder of the material.

Therefore, how to mix the active activator with the material at the appropriate addition point in an automated manner under the high temperature and high-density dust environment in the vertical mill grinding system, so as to effectively ensure that the polymer and the active activator in the active activator The adhesion effect of the particle interface of the raw material micropowder finished product can significantly improve the potential activity of the material micropowder finished product. These technical difficulties have become urgent issues to be solved at present.

Contents of the invention

The technical problem to be solved by the present invention is to provide an active activator that can be automatically and uniformly added in a high-density dust environment, and the addition amount is controllable and adjustable, thereby ensuring that the active activator can be effectively attached to the particle interface of the finished micropowder. , and then stimulate the potential activity of the material to activate the atomization device for the active agent used in the metal tailings grinding system.

The technical scheme that the present invention adopts for solving the technical problem that exists in the known technology is:

An active activator atomization device for metal tailings grinding system, characterized in that it includes a spray gun welded by an inner tube and an outer tube, an air inlet ring cavity is formed between the outer tube and the inner tube, and the air inlet One end of the ring cavity is a closed end, and the other end is an open end. The spray gun is installed on the connecting pipe between the vertical mill and the bag filter. The open end extends into the connecting pipe, and the closed end is located in the connecting pipe. In addition, an air inlet is provided on the side wall of the outer casing outside the connecting pipe, and one end of the inner pipe outside the connecting pipe protrudes from the outer casing to form a liquid inlet end; the gas-liquid mixing nozzle is installed on the On the open end of the spray gun; including a liquid supply system connected to the liquid inlet end of the inner tube of the spray gun, the liquid supply system includes a liquid storage device, a liquid inlet passage connecting the liquid storage device and the liquid inlet end of the inner pipe, and an auxiliary passage for realizing pressure relief, A metering pump, a filter and a pressure gauge A are sequentially installed on the liquid inlet passage along the flow direction of the liquid, and stop valves are provided near both ends of the liquid inlet passage; the auxiliary passage is composed of an overflow valve and a one-way valve. The two ends of the auxiliary passage are respectively connected with the liquid storage device and the connecting pipeline between the pressure gauge A and the filter on the main passage; including the air supply system connected to the air inlet of the outer casing of the spray gun, the The air supply system includes an air compressor, an air storage device connected to the air compressor, and a main air intake passage connecting the air storage device and the air inlet of the outer casing. Pre-filters are installed in sequence along the flow direction of the gas on the main air intake passage. device, gas drying equipment, post-filter and pressure gauge B.

The technical scheme that the present invention can also adopt is:

The air supply system also includes an auxiliary air intake passage, on which a stop valve is installed, one end of the auxiliary air intake passage communicates with the front end of the main air intake passage, and the other end of the auxiliary air intake passage communicates with the main air intake passage. The connecting pipeline between the pressure gauge B and the post-filter on the air passage is connected; on the front-end pipeline of the main air intake passage, on the connecting pipeline between the gas storage device and the air compressor, and on the main air intake passage A cut-off valve is arranged on the connecting pipeline between every two connected components.

The liquid storage device is equipped with an electric heating device and a stirring device.

A liquid flow sight glass is also installed on the liquid inlet passage, and the liquid flow sight glass is arranged on the connecting pipeline between the filter and the pressure gauge A.

The gas-liquid mixing nozzle is composed of a nozzle head provided with an inner cavity and a baffle installed in the nozzle head. The front end of the nozzle head is provided with spray holes uniformly distributed along the circumference, and the middle part of the baffle is provided with a The liquid phase holes communicated with the tubes, and a plurality of gas phase holes connected with the inlet ring cavity are uniformly arranged outside the liquid phase holes.

The advantages and beneficial effects that the present invention has are:

The active activator atomization device has a simple structure and a reasonable design. Through the cooperation of the gas supply system and the liquid supply system, the active activator can be effectively atomized and sprayed evenly in the pipeline, thereby better ensuring the consistency of the finished product with the raw material micropowder. Uniform mixing ensures that the active activator can be effectively attached to the particle interface of the finished micropowder, thereby stimulating the potential activity of the material, making the material have a high activity index, and can be used as a high-quality cement mixture or concrete mineral admixture. It is heavily incorporated into cement or concrete to reduce costs and reduce consumption of non-renewable resources. In this active activator atomization device, the spray gun is installed at the connecting pipe between the air outlet of the vertical roller mill and the bag filter, and the addition point of the active activator is formed in the connecting pipe. The way in the mill avoids the impact of the hot air environment in the mill on the performance of the active activator, thereby reducing the volatilization and loss of the active activator. The active activator atomization device can realize the adjustment and control of the added amount by adjusting the liquid flow and pressure of the active activator and the pressure of the gas, so as to meet different production needs.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is a schematic diagram of the installation position of the present invention in a metal tailings grinding system.

In the figure: 1, inner pipe; 101, liquid inlet end; 2, outer casing; 201, air inlet; 3, air inlet ring cavity; 4, gas-liquid mixing nozzle; 401, nozzle head; 402, baffle; 403 , liquid phase hole; 404, gas phase hole; 5, liquid supply system; 501, liquid storage device; 502, metering pump; 503, filter; 504, pressure gauge A; 505, overflow valve; 506, one-way valve; 507. Electric heating device; 508. Stirring device; 509. Liquid flow sight glass; 6. Gas supply system; 601. Air compressor; 602. Gas storage device; 603. Pre-filter; 604. Gas drying equipment; 605 , Rear filter; 606, pressure gauge B; 607, auxiliary air intake passage; 1,, vertical mill; 2,, bag filter; 3,, connecting pipe.

detailed description

In order to further describe the present invention in detail, it will be described below in conjunction with the accompanying drawings and specific embodiments. In particular, the following examples are only for explanation of the present invention and the present invention is not limited to the following examples.

Please refer to Figure 1-3, an active activator atomization device for metal tailings grinding system, which consists of the following parts:

It includes a spray gun welded by an inner tube 1 and an outer tube 2. An air inlet ring chamber 3 is formed between the outer sleeve and the inner pipe, one end of the air inlet ring chamber is a closed end, and the other end is an open end. The spray gun is installed on the connecting pipe 3 between the vertical mill 1 and the bag filter 2, and its open end stretches into the connecting pipe, and its closed end is located outside the connecting pipe. Specifically, an opening for inserting a spray gun is provided on the side wall of the connecting pipe between the vertical mill and the bag filter, the pipe flange is welded outside the opening of the connecting pipe, and the outer casing is close to the intake ring cavity. The flange plate is welded at the closed end, and the spray gun is fixed on the connecting pipe through the connection between the flange plate and the pipe flange. An air inlet 201 is provided on the side wall of the outer casing outside the connecting pipe, and one end of the inner pipe outside the connecting pipe protrudes from the outer casing to form a liquid inlet 101 .

Including the gas-liquid mixing nozzle 4, the gas-liquid mixing nozzle is installed on the open end of the spray gun. Specifically, the gas-liquid mixing nozzle is integrally connected with the spray gun through threads and locked with a nut.

It includes a liquid supply system 5 connected to the liquid inlet end of the inner pipe of the spray gun. The liquid supply system includes a liquid storage device 501 , a liquid inlet passage connecting the liquid storage device and the liquid inlet end of the inner tube, and an auxiliary passage for realizing pressure relief. A metering pump 502, a filter 503 and a pressure gauge A504 are sequentially installed on the liquid inlet passage along the flow direction of the liquid. The metering pump is preferably a diaphragm metering pump. Stop valves are provided near both ends of the liquid inlet passage. The auxiliary passage is composed of a overflow valve 505 and a one-way valve 506 connected by pipelines. Both ends of the auxiliary passage communicate with the liquid storage device and the connecting pipeline between the pressure gauge A and the filter on the liquid inlet passage respectively. The function of the auxiliary passage is to realize pressure relief, that is, when the liquid flow in the liquid inlet passage exceeds the set value, part of the liquid in the liquid inlet passage flows through the overflow valve and the one-way valve in the auxiliary passage, and returns to the liquid storage device In order to ensure that the liquid pressure in the liquid inlet channel does not exceed the set value and matches the gas pressure.

Comprising an air supply system 6 connected to the air inlet of the outer casing of the spray gun. The air supply system includes an air compressor 601, an air storage device 602 connected to the air compressor, and a main air intake passage connecting the air storage device and the air inlet of the outer casing. Along the flow direction of the gas, a pre-filter 603, a gas drying device 604, a post-filter 605, and a pressure gauge B606 are sequentially installed on the main air intake passage. The gas drying device can be a refrigerated dryer. Moisture in compressed air.

In the above structure, the air supply system also includes an auxiliary air intake passage 607, a stop valve is installed on the auxiliary air intake passage, one end of the auxiliary air intake passage communicates with the front end pipeline of the main air intake passage, and the auxiliary air intake passage The other end communicates with the connecting pipeline between the pressure gauge B and the post-filter on the main intake passage. Stop valves are provided on the front end pipeline of the main air intake passage, on the connecting pipeline between the gas storage device and the air compressor, and on the connecting pipeline between every two connected components on the main air intake passage. The role of setting the auxiliary air intake passage is as a temporary open backup passage, that is, when the components (including the above-mentioned pre-filter, gas drying equipment, and post-filter) on the main air intake passage fail, they can be closed The main air intake passage is opened, and the auxiliary air intake passage is opened at the same time. In this way, the components and parts can be removed from the main air intake passage for maintenance or replacement without affecting the continuous operation of production.

In the above structure, the liquid storage device is further provided with an electric heating device 507 and a stirring device 508 . The electric heating device can adopt various common electric heating tube structures. The stirring device can be composed of a motor and a stirrer driven by the motor. Its function is to make the viscosity of the active activator less than 50CST, so as to ensure that the equipment can still work normally in colder climate conditions.

In the above structure, a liquid flow sight glass 509 is further installed on the liquid inlet passage, and the liquid flow sight glass is arranged on the connecting pipeline between the filter and the pressure gauge A. Installing a liquid flow sight glass on the liquid inlet pipeline can easily observe the fluid flow on the liquid inlet pipeline at any time, so that it can be observed whether the liquid flows smoothly to judge whether the gas-liquid mixing nozzle is blocked.

In the above structure, the gas-liquid mixing nozzle is composed of a nozzle head 401 with an inner cavity and a baffle 402 installed in the nozzle head. The front end of the nozzle head is provided with spray holes uniformly distributed along the circumference, the middle part of the baffle is provided with a liquid phase hole 403 communicated with the inner pipe of the spray gun, and a liquid phase hole 403 communicated with the air inlet ring cavity is uniformly distributed along the circumference outside the liquid phase hole. Gas phase hole 404 . With this nozzle structure, the active stimulant liquid input from the inner tube of the spray gun flows out from the liquid phase hole in the center, and sprays out from the gas phase holes distributed around the circumference of the compressed air input from the inlet ring cavity of the spray gun, and then enters the gas-liquid mixing nozzle. In this way, under the action of gas pressure, the active activator liquid is evenly sprayed into the connecting pipe in the form of mist through the nozzle hole of the gas-liquid mixing nozzle.

Working principle of the present invention: the installation position of the adding point of the device is selected at the connecting pipe between the air outlet of the vertical mill and the bag filter. The liquid supply system of the active agent activation atomization device provides the active activation agent liquid with controllable and adjustable flow and pressure after filtration (the flow setting is adjusted in proportion according to the feeding amount, and the pressure is generally 0.3-0.5Mpa); its air supply The system provides pure pressure-adjustable compressed air (generally 0.3-0.5Mpa) through the internal front and rear filters and refrigerated dryer. The active activator liquid enters the gas-liquid mixing nozzle through the inner tube of the spray gun extending into the pipeline, and the compressed air enters the gas-liquid mixing nozzle through the air inlet ring cavity between the outer tube of the spray gun and the inner tube, and the two are at the front end of the gas-liquid mixing nozzle Mixing, under the action of gas pressure, the active activator liquid is sprayed out in a mist form through the nozzle hole of the gas-liquid mixing nozzle, enters the connecting pipeline, and is evenly mixed with the raw material micro-powder finished product conveyed by gas in the connecting pipeline.

Claims (5)

1. An active stimulant atomizing device for metal tailings grinding system, characterized in that: it includes a spray gun welded by an inner tube and an outer tube, and an air intake ring cavity is formed between the outer tube and the inner tube, One end of the air intake ring cavity is a closed end, and the other end is an open end. The spray gun is installed on the connecting pipe between the vertical mill and the bag filter, and its open end extends into the connecting pipe, and its closed end is located at the Outside the connecting pipe, an air inlet is provided on the side wall of the outer casing outside the connecting pipe, and the end of the inner pipe outside the connecting pipe protrudes from the outer casing to form a liquid inlet end; including gas-liquid mixing nozzles, gas-liquid mixing nozzles Installed on the open end of the spray gun; including a liquid supply system connected to the liquid inlet end of the inner tube of the spray gun. On the liquid inlet passage, a metering pump, a filter and a pressure gauge A are installed in sequence along the flow direction of the liquid, and stop valves are provided near both ends of the liquid inlet passage; the auxiliary passage is composed of an overflow valve and a single The directional valve is connected by pipelines, and the two ends of the auxiliary passage are respectively connected with the connection pipeline between the pressure gauge A and the filter on the liquid storage device and the liquid inlet passage; including the air supply system connected to the air inlet of the outer casing of the spray gun , the air supply system includes an air compressor, an air storage device connected to the air compressor, a main air intake passage connecting the air storage device and the air inlet of the outer casing, and the main air intake passage is sequentially installed along the flow direction of the gas Pre-filter, gas drying equipment, post-filter and pressure gauge B. 2. The active activator atomization device for metal tailings grinding system according to claim 1, characterized in that: the air supply system also includes an auxiliary air intake passage, and a cut-off valve is installed on the auxiliary air intake passage. Valve, one end of the auxiliary air intake passage communicates with the front end pipeline of the main air intake passage, and the other end of the auxiliary air intake passage communicates with the connecting pipe between the pressure gauge B and the rear filter on the main air intake passage; Stop valves are provided on the front end pipeline of the main air intake passage, on the connecting pipeline between the gas storage device and the air compressor, and on the connecting pipeline between every two connected components on the main air intake passage. 3. The active activator atomizing device for metal tailings grinding system according to claim 1, characterized in that: the liquid storage device is provided with an electric heating device and a stirring device. 4. The active activator atomization device for metal tailings grinding system according to claim 1, characterized in that: the liquid inlet passage is also equipped with a liquid flow sight glass, and the liquid flow sight glass is arranged on the filter On the connecting pipeline between the pressure gauge and the pressure gauge A. 5. The active activator atomizing device for metal tailings grinding system according to claim 1, characterized in that: said gas-liquid mixing nozzle consists of a nozzle head provided with an inner cavity and a nozzle head installed in the nozzle head The front end of the nozzle head is provided with spray holes uniformly distributed along the circumference, the middle part of the baffle is provided with a liquid phase hole connected to the inner pipe of the spray gun, and the liquid phase hole is uniformly arranged outside the liquid phase hole to communicate with the intake ring cavity. multiple gas phase holes.