SU827547A1 - Device for producing water-mazut emulsion for injecting into blast furnace - Google Patents

Description

Yarok has a higher viscosity compared to light fuel oil (A.I. Karabin and others. Combustion of liquid fuel in industrial plants, Metallurgi, 1966, pp. 9-10, 12-13, Tables 1 and 3), which in case of sushi, the design of supplying it to the collector of the plunger unit causes vibration of the iododer w, their fuel oil pipelines and the entire plunger unit, as well as uneven operation of suction valves and unstable operation of the entire installation. The increased viscosity of fuel oil makes it more difficult to clean the crankcase of the plunger block from the fuel oil entering it. In addition, a damper tank is used in the installation, which is rigidly connected to the technological line of emulsion supply to the blast furnace, and the pressure of fuel oil before the intake valve manifold is limited to 2 kg / cm, as experience shows, exceeding this value causes an increased knock and wear of the suction valve. . The aim of the invention is to eliminate these drawbacks, improve the quality of water-oil emulsion entering the blast furnace, increase the rate of replacement of coke with fuel oil and the reliability of the entire installation as a whole, increase the technical and economic indicators of blast-furnace smelting and quality of iron. This goal is achieved by connecting the fuel oil supply pipeline through mixing devices on two opposite sides to a suction manifold equipped with spring-loaded suction valves, and the crankcase of the plunger unit is equipped with a supply and discharge pipeline heated to 70-95 ° C supplied to the common fuel oil pipe through the storage tank and the dosing pumps of the oily, flush water, which are connected by feedback to the sensors controlling the humidity of the flooded fuel oil, the finished emulsion, and Str torus maintain its predetermined humidity. In addition, a damper tank, made in the form of a sealed cylinder, in which the emulsion discharge pipe is located connected to the emulsion supply pipeline, the outlet of the emulsion, the outlet of which is located at a distance of 1/4 its diameter from the lower base of the cylinder, the damping tank being filled at 30-40% by volume with compressed air under pressure of 60-150 kg / cm and the rest of its volume is filled with liquids m oil, divided between themselves and between the water-oil emulsion and oil moving partitions. At the same time, the storage tank is equipped with a pipeline for supplying water heated to 70-95 ° C by means of a metering pump, connected back to the water level control sensor through the regulator to maintain its predetermined value, and a metering pump for supplying heated water to the plunger crankcase block. The capacity of the mixing devices is 2-3 times higher than the performance of the high-pressure pump, and the pipeline supplying fuel oil to the intake manifold is connected by an averaging-circulation pipeline with a pipeline supplying watered fuel oil to the mixing devices. In addition, when two or more high-pressure pumps are used in an installation, their heating manifolds are connected via transition pipes by individual inlets to a common homogenizing head equipped with one pipe of a finished water-oil emulsion, as well as transition pipes of each pump are connected by off-side pipelines to a common drain pipe connected to damping capacity. FIG. 1 shows a diagram of the device; in fig. 2 shows the suction valve design of a plunger assembly (assembly I of FIG. 1); in fig. 3 - design of damping capacity; in fig. 4 shows the layout of the device when two or more high pressure pumps are used in the pump. The device (Fig. 1) includes a high-pressure pump 1, with a crankcase 2 of a plunger unit 3 having 4 suction and discharge 5 manifolds, equipped with respectively spring-loaded suction 6 and discharge 7 valves, equipped with a supply pipe 8 of watered fuel oil with filter 9, s pressure sensors 10, temperature 11 and humidity 12, mixing devices 13, supplying mixed and averaged fuel oil from opposite sides to the suction manifold 4 through two fuel oil lines 14 with suction By applying them to the circulating oil-heating oil line 15, the discharge manifold 5 is connected at the outlet by a transition pipe 16 to the homogenizing head 17 connected to the fuel oil line 18 supplying the finished water-oil emulsion to the blast furnace and equip- a circulation pipe 21 of the emulsion with the main fuel oil line 8 in front of the humidity sensor 12 in the direction of the fuel oil, and in addition to the transition pipe 16 is connected to a discharge pipe oprovodom 22 through the valve 23, the damper container 24 filled with liquid 25, types of industrial oil flowing through conduit 26 with a stop valve 27 and compressed air 28,

periodically pumped from cylinder 29 via air line 30 with shut-off valve 31. Crankcase 2 is equipped with a pipeline 32 for periodically entering water heated to 70-95 ° C with a metering pump 33 and a pipeline 34 for discharging polluted, flushing water into a storage tank 35 equipped with a pipeline 36 for entering warmed up to 70-95 ° C of water supplied by the dosing pump 37 connected with feedback 38-40 through the regulator 41 of a given water level in the tank with the dosing pump 33 and the water level sensor 42. Additionally, the storage tank is connected by a pipeline 43, equipped with a filter 44, to the main pipeline 8 through a metering pump 45 for contaminated, flush water connected by feedback 46-48 through a regulator 49 of a given emulsion humidity with sensors 12 and 19, respectively emulsi. The suction valve 6 (Fig. 2) is located inside the plunger unit and includes a valve 50 and a spring 51, which rests on one side on the valve 50 and on the other on the corona 52 of the plunger unit 3. The damper tank 24 (Fig. 3) includes a discharge pipe 22, the output end of which is at a distance of 1/4 of the inner diameter from the bottom base of the container, and separating movable partitions 53, 54 of lightweight oil resistant material, respectively, between the emulsion and the liquid, between the liquid and the compressed air, which occupies 30-40% of the volume emifernoy capacity, and the remaining volume is filled with liquid. When two or more high-pressure pumps 1 (Fig. 4) are used in the installation, their injection manifolds are connected through transition pipes 16 by individual inlets to the common homogenizing head 17. equipped with one pipe 18 of the finished water-oil emulsion entering the blast furnace. as well as the transition pipelines 16 of each pump are connected by separate pipelines 55 to a common bypass pipe 22. connected to the damper tank 24 (FIG. 3).

The device works as follows.

Watered fuel oil from the storage facility enters through the trunk pipeline 8, equipped with Biltr 9, pressure sensors 10. Temperature 11 and humidity 12, to interleavers 13, for which you can use pterster-type pumps, where pre-mixing of the fuel oil with water takes place and coarse water is produced. r1, an oil-based emulsion which, via the fuel line 14, is fed from two opposite sides to the suction manifold 4 of the plunger unit 3 of the high-pressure pump 1 and then pass the spring-loaded suction valve 6, flows through the discharge valves 7 into the discharge manifold 5, from which, under a pressure of 60-150 kg / cm, created by the high-pressure pump plungers, the coarse emulsion is introduced through a transition pipe 16 connected by a diverting pipe 22 with a damping tank 24. into the homogenizing head

17, from which a fine water-oil emulsion is prepared, enters the tuyeres of the blast furnace through a pipeline 18 equipped with a humidity sensor 19 and a flow meter 20 and connected to a pipeline 8 of watered fuel oil by a circulation pipe 21, which ensures that the excess emulsion is discharged above its required flow rate to the blast furnace and not while causing additional watering

fuel oil. The suction valve 50 is spring-loaded through a spring 51, which creates a counter-pressure, resting on one side on the valve 50 and on the other on the body 52. This valve design

eliminates the knocking and wear of suction valves 50, and also eliminates the vibrations of fuel oil pipes 14 and intake manifold 4, which happened, as the experience of operating high-pressure pumps without springing suction valves, during the collection of flooded fuel oil from the fuel oil main and during technological shocks at excess pressure of fuel oil

more than 2 kg / cm.

Input of fuel oil through two fuel lines 14 from opposite sides to the suction manifold 4 of the plunger unit 3 ensures uniform flow of the emulsion into the manifold 4 and to the suction valves 6. which eliminates the vibrations of the plunger unit 3. uneven and unstable operation of the valves 6 and the entire installation as a whole especially when working on

heavy fuel oil with high viscosity.

The EMULSION pressure parameters in the injection manifold of 60-150 kg / cm are explained by the need to obtain

emulsions of water droplets with a maximum size of 2 µm in accordance with the requirements of combustion theopia (Bulletin of TsNIICHM. 1974. LG 6. p. 60). Increasing the pressure above 150 kg / cm is not a good electrical condition.

since this does not lead to the .much fine grinding of the size of the drop (Lee L.W. Lvig trills in internal sgopani, v. 1, ML-ONTM, pp. 108-137).

Lempergna capacity 24 will burn

pipe outlet 22. The output end of which is located at a distance of 1/4 of its internal diameter from the base of the tank, the pulsating pressure arising in the transition pipe-fitting 16 and the pressure manifold 5 due to the cyclical operation of valves 7, due to the fact that it is made in the form of a sealed a cylinder filled with 30–40% in the upper part with air 28 under a pressure of 60–150 kg / cm2, equal to the established working pressure of the emulsion in the discharge manifold, and the rest of its volume is filled with industrial type oil, To reduce the solubility of air in the oil and mix the fuel oil with the oil, as well as to perceive and quench the energy when the pressure in the manifold 5 and the transition pipe 16 is changed, movable partition walls of lightweight oil resistant material are installed in the damper tank in the form of circle oil 53 ina air-oil interface in the form of a ring. The distance of the branch pipe 22 from the lower base of the damper tank is determined from the equality of the internal cross-sectional area of the branch pipe 22 of the side surface of an imaginary cylinder, whose diameter is equal to the internal diameter of the branch pipe 22 (d internal) and its height (I) is equal to the distance from the lower base damping capacity to cut off the outlet of the discharge pipe 22, which can be expressed mathematically

 internal, un

- HWgHyrp I

from where I am 1/4 yvutr.

It was experimentally confirmed that increasing this distance more than 1 / 4s internally leads to emulsion emissions and contacting it with air, which creates conditions for thickening, solidification due to the loss of liquid mobility of a water-oil emulsion, since the solidification point of M40, M100, M200 fuel oil

is at the level of +25 | -42 ° C (M. B.

Ravich Fuel and efficiency of its use, "Science, M., 1971, p. 215, tab. 85). The reduction of the specified distance leads to the vibration of the transition pipe 16 and the homogenizing head 17. Liquid oil of industrial type, having a freezing point of -1030 ° С (N. I. Chernozhukov. Oil technologists, part III, GOSTOPTehnika, ML. , 1952, p. 141) provides good conditions for the operation of the damping device and, accordingly, the entire installation. The ratios of the relative volumes of fluid and air are selected experimentally with regard to ensuring that the installation stops vibrating at a wide range of pressure variations in the discharge manifold. The damper device 24 of the proposed type is flexibly connected to the fuel oil process flow, and its installation in front of the homogenizing head as the emulsion moves creates stable conditions for the operation of the homogenizing head, as well as the installation as a whole, and completely eliminates its vibration.

5 The moisture stabilization of the emulsion is provided as follows. The water is heated to 70-95 ° C through conduit 32 periodically, as needed, by means of a metering pump 33, is fed into

0 crankcase 2 of the plunger unit 3 for flushing of the fuel oil crankcase that enters it when operating through the leakage of the plungers of the high-pressure pump 1 and then through the pipeline 34 to the storage tank

5 35, in which its constant level is maintained by the additional input of water heated to 70-95 ° C through a pipeline 36 by a pump-pump 37 connected by feedback 38-40 through a regulator

0 41 of the specified water level in the tank with the metering pump 33 and the water level sensor 42. From the storage tank 35 but to the pipeline 43 through the filter 44 is heated to 70-95 ° C, the wash water is oily

5 is supplied to the pipeline 8 watered with fuel oil by the dosing pump 45 connected with feedback 46-48 through the controller 49 of a given emulsion humidity with sensors 12 and 19, respectively, the humidity of the watered fuel oil and the finished water-oil emulsion. The temperature of the water should be in the range of 70-95 ° C, since on the one hand it provides a quick flush of viscous masses of fuel oil, especially

5 heavy grades, from crankcase 2 and on the other hand, the physical properties of the flooded maz and the metering pump 45 do not decrease, since according to the technical requirements of the blast furnace gas to improve the conditions for the combustion of fuel oil in the tuyere hearth, its temperature should be the level of 100 ° C (Stal, No. 2, 1978, I. M. Peftiev, A. G. Popov, A. Ya. Vorobev et al., p. 108). Besides

In addition, the use of wash water with oily water in the process stream of obtaining a water-oil emulsion and blowing it into the blast furnace eliminates the possibility of contamination of the water basin.

0 In order to improve the quality of the coarse water of the nitric emulsion obtained after the mixing devices 13, the productivity of the mixing devices exceeds 2-3 times the performance of a high-pressure pump 1, which ensures

2-3-fold mixing of fuel oil in kon

a circulation round through an averaging-circulation pipeline 15.

When used in an installation of two and

0 more high-pressure pumps 1 (Fig. 4) the coarse water-oil emulsion is injected through the transition pipes 16 from each pump by self-inlets into a common homogenizing head 17,

5 supplied with one pipe 18 of the finished emulsion entering the blast furnace, an additional pulsating pressure of the coarse emulsion is supplied through separate pipes 55 connected to the transition pipes 16 and to the common discharge pipe 22 of the emulsion, to the damping tank 24. This arrangement of the water-oil emulsion production unit further contributes ensuring complete cessation of vibrations of its individual components, greatly simplifies the setup of the installation and the regulation of the quality of water-oil emulsion, as well as ie more efficient use of working areas with high volumes of production.

The use of the proposed installation to obtain a fine dispersion of a water-oil emulsion supplied to the tuyere stock of a blast furnace allows efficient use of flooded fuel oil in blast furnace smelting, especially heavy grades, without soot, and thus stabilizes the flow of the blast furnace and will increase by 5-10% the replacement rate of coke with fuel oil, especially at high costs, more than 100 kg / t of pig iron and high enrichment to blow oxygen with more than 30%, which will ensure a reduction in the specific consumption of coke about 5-10 kg / t of iron, will improve the quality of the iron, the stability of its chemical composition, which is especially important when using iron for oxygen-converting redistribution, and also improves the operation of the blast furnace gas cleaning path by eliminating the discharge of finely dispersed carbon from the fuel oil pyrolysis with blister gas due to the improvement of its combustion processes in the tuyere hearth.

Claims (2)

1. A device for producing a water-oil emulsion for blowing into a blast furnace. containing shut-off and control equipment, filters for cleaning oil and water, supply lines for fuel oil from its storage and water through a metering pump to a common supply line for fuel oil connected to a high-pressure pump with a crankcase with sump and suction and discharge manifolds equipped suction and spring-loaded injection valves, a homogenizing head connected by a pipeline to the discharge manifold and an emulsion supply pipe to the blast furnace, which is different. the fact that, in order to increase the reliability of the device and to improve the quality of the water-oil emulsion, the device is reported as a damper tank, which is connected by a discharge pipe to the pipeline supplying fuel oil from the injection manifold to the homogenizing head, and displacing devices connected on two opposite sides to the intake manifold are embedded in the fuel supply common pipe, the crankcase of the plunger unit communicates with the supply and discharge pipeline of polluted water connected in series through the storage tank and metering pump with a common fuel oil supply pipeline. 2. The device according to claim 1, characterized in that the damping tank is made in the form of a sealed cylinder, in which there is an EMULSION branch pipe, the outlet of which is located 1/4 of its internal diameter from the bottom of the cylinder, Information sources, taken into account in the examination 1. Prospectus for a water-oil emulsion plant, Gaulin Sogroration, England  a u / f t ±: jl J ff fug, 2 four wym / j.