Normal-pressure slag disintegrating tank and normal-pressure slag disintegrating method

Abstract

The invention relates to the field of slag disintegration, in particular to a normal-pressure slag disintegration tank and a normal-pressure slag disintegration method. The normal-pressure slag disintegrating tank comprises a barrel body, a coil pipe, a water storage jacket and a water pump, the coil pipe penetrates through the barrel wall at the top end of the barrel body to form an in-barrel coil pipe and an out-barrel coil pipe, the in-barrel coil pipe is coiled upwards from the middle position of the barrel body along the inner wall of the barrel body, the pipe diameter of the in-barrel coil pipe is gradually reduced, and a notch is formed in the position with the minimum pipe diameter; the barrel outer coil pipe extends downwards outside the barrel body, and the pipe diameter of the barrel outer coil pipe is gradually increased; the water storage jacket is arranged on the peripheral wall of the lower end part of the barrel body, the top wall of the water storage jacket is communicated with a balance pipe extending upwards, and the lower end of the barrel outer coil pipe is communicated with the water storage jacket; the water pump is communicated with the water storage clamping sleeve and the lower end of the in-barrel coil pipe and used for pumping water in the water storage clamping sleeve into the in-barrel coil pipe. According to the invention, slag disintegration and hot gas treatment can be realized on the premise of no pressure safety risk, and no waste water or waste gas is generated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of slag granulation, in particular to a normal pressure slag granulation tank and a normal pressure slag granulation method. BACKGROUND

[0002] There are several ways to treat steel slag, such as hot splashing, hot granulation, water quenching, air quenching, drum granulation and granulation wheel method. The hot splashing method is to pour molten liquid steel slag into a hot splashing field, and then to cool it by water or air, and then to crush and magnetically select the slag. The hot granulation method is to pour molten liquid steel slag into a hot granulation pool, and then to cool it by water, and then to crush and magnetically select the slag after the slag is pulverized. The water quenching method is to pour molten liquid steel slag, and then to cool and break it into particles by high-pressure water. The air quenching method is similar to the water quenching method, but it uses high-pressure air to cool and break the molten steel slag into particles.

[0003] The hot splashing method has low efficiency and pollutes the environment. The hot granulation method, the water quenching method and the air quenching method have high efficiency, but the hot granulation method and the water quenching method may cause explosion because water directly contacts the molten steel slag. The air quenching method uses compressed air to cool and break the molten steel slag, but it has high consumption of compressed air and high noise.

[0004] The drum method is to pour liquid steel slag into a slag tank, and then to transport the slag tank to a drum slag treatment room by a slag tank truck, and then to hoist the slag tank to a drum slag inlet device slot by a crane, and then to pour the liquid steel slag into the drum device, and then to cool, solidify and break the liquid steel slag in the drum, and then to discharge the slag to a slag field by a plate conveyor. The drum method has the following problems: the steel slag treatment rate is low, generally below 50%, and a large amount of dry slag is discharged; the system has high power consumption and high failure rate of equipment, and has high investment; the steel slag is not easy to be broken and granulated, and the equipment is seriously worn, and the steel balls are often replaced.

[0005] There is also a hot-pressing treatment method, such as the patent with the authorization announcement number CN105063255B, which uses the residual heat of steel slag to spray water on the steel slag in a sealed pressure vessel, without consuming external energy and without generating dust, and is high in efficiency, energy saving and environmental protection. However, in the treatment process, there is a contradiction between the water and the molten steel slag. When the sprayed water is less, the cooling effect is poor, and when the sprayed water is large, a large amount of water vapor is generated to form high pressure, causing operation risk.

[0006] In summary, the existing slag granulation methods all have inherent defects, and it is urgent to provide a better slag granulation device and method. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the defects of the prior art, and to provide a normal pressure slag granulation tank, which can realize slag granulation and hot gas treatment without pressure safety risk, and without waste water and waste gas.

[0008] In order to solve the above technical problems, the technical scheme of the present application is as follows: a normal-pressure slag granulation tank, comprising: a barrel body; a coil pipe, which passes through the top end barrel wall of the barrel body, forms an inner barrel coil pipe and an outer barrel coil pipe, the inner barrel coil pipe spirals upward along the inner wall of the barrel body from the middle position of the barrel body and gradually decreases in pipe diameter, and the position with the smallest pipe diameter is provided with a notch; the outer barrel coil pipe extends downward outside the barrel body and gradually increases in pipe diameter; a water storage jacket, which is arranged on the outer peripheral wall of the lower end of the barrel body, and the top wall of the water storage jacket is connected with an upward extending balance pipe, and the lower end of the outer barrel coil pipe is connected with the water storage jacket; a water pump, which is connected with the water storage jacket and the lower end of the inner barrel coil pipe, and is used for pumping water in the water storage jacket into the inner barrel coil pipe.

[0009] Further, in order to make the hot air more smoothly enter the coil pipe and be able to incidentally blow a small amount of cold air, the normal-pressure slag granulation tank further comprises a one-way impeller which is rotatably arranged at the upper end of the barrel body, and the one-way impeller is passively rotated under the impact of the falling steel slag and the impact of the upward sprayed hot air to send the hot air into the notch.

[0010] Further, in order to make more air enter the coil pipe, a gas collecting cover is arranged at the notch.

[0011] Further, the inner diameter of the barrel body gradually decreases from the middle position to the upper and lower ends.

[0012] Further, the balance pipe extends upward to be flush with the top end of the barrel body.

[0013] Further, the outer barrel coil pipe is connected with the water storage jacket away from the water pump.

[0014] Further, in order to make the gas more quickly escape, the balance pipe is connected with the position of the top wall of the water storage jacket close to the outlet of the outer barrel coil pipe.

[0015] Further, the amount of water in the water storage jacket is configured to absorb the heat released by the steel slag added into the barrel body to reduce the temperature without boiling.

[0016] Further, the water pump is a submersible pump which is located in the water storage jacket, and the water outlet of the water pump is connected with the lower end of the inner barrel coil pipe.

[0017] The present application also relates to a normal-pressure slag granulation method, comprising: starting the water pump to add steel slag into the barrel body; the water in the water storage jacket enters the inner barrel coil pipe under the action of the water pump, flows upward along the inner barrel coil pipe, and cools the inside of the barrel body; With the decrease of the pipe diameter of the inner coil, the gap sucks the hot air at the top of the barrel into the coil for heat exchange, and the steel slag is cooled down. The water in the inner coil is returned to the water storage jacket through the outer coil, and the gas is washed and cooled and then escapes through the balance pipe.

[0018] After the above technical scheme is adopted, the present application has the following beneficial effects: The inner coil is arranged in a spiral upward direction and the pipe diameter gradually decreases, and the outer coil is arranged in a gradually increasing pipe diameter from top to bottom, which not only can realize water cooling and slagging by the cooling water in the inner coil, but also can rely on the Venturi effect to suck the hot air from the gap of the thinnest part of the coil into the coil, so that the cooling water and the hot air directly exchange heat, the gas is directly cooled, and the gas is also washed, so that the hot gas can be treated while slagging, without waste gas and environmental pollution; and the present application adopts normal pressure slagging, without pressure requirement for the equipment, which can reduce the equipment manufacturing cost, and there is no pressure safety risk in the slagging process. In addition, the present application uses water to cool the steel slag, but the water does not contact the steel slag, so the water is not consumed and no waste water is generated, further reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is an internal structure diagram of the normal pressure slagging tank of the present application; Figure 2 It is an external structure diagram of the normal pressure slagging tank of the present application; In the figure, 1 is a barrel body; 2 is a coil; 21 is an inner coil; 211 is a gap; 22 is an outer coil; 3 is a water storage jacket; 4 is a balance pipe; 5 is a water pump; 6 is a gas collecting cover; 7 is a one-way impeller; 8 is a feeding port; and 9 is steel slag. DETAILED DESCRIPTION

[0020] In order to make the content of the present application more easily understood, the present application will be further described in detail below according to specific embodiments and in conjunction with the drawings.

[0021] As shown in Figure 1 and Figure 2 , a normal pressure slagging tank comprises: a barrel body 1; a coil 2 penetrating through the top end barrel wall of the barrel body 1 to form an inner coil 21 and an outer coil 22, the inner coil 21 spirally extends upward along the inner wall of the barrel body 1 from the middle position of the barrel body 1 and the pipe diameter gradually decreases, and the position with the smallest pipe diameter is provided with a gap 211; the outer coil 22 extends downward outside the barrel body 1 and the pipe diameter gradually increases; a water storage jacket 3 arranged on the outer peripheral wall of the lower end of the barrel body 1, and the top wall of the water storage jacket 3 is connected with an upward extending balance pipe 4, and the lower end of the outer coil 22 is connected with the water storage jacket 3; A water pump 5 is connected to the water storage jacket 3 and the lower end of the inner barrel coil 21 to pump water from the water storage jacket 3 into the inner barrel coil 21.

[0022] The water pump 5 can be a submerged pump located in the water storage jacket 3, with its outlet connected to the lower end opening of the inner barrel coil 21. Of course, the water pump 5 can also be located outside the water storage jacket 3, with its inlet connected to the water storage jacket 3 and its outlet connected to the lower end opening of the inner barrel coil 21.

[0023] In this embodiment, considering that the heat at the lower end of the barrel body 1 can be directly transferred to the water storage jacket 3, the inner barrel coil 21 is spirally wound upwards along the inner wall of the barrel body 1 from the middle position of the barrel body 1, i.e., the top end of the water storage jacket 3 is basically level with the bottom end of the inner barrel coil 21. In this way, the space occupied in the barrel body 1 can be minimized, and the amount of coil 2 used can be saved.

[0024] The atmospheric pressure slag granulation method based on the atmospheric pressure slag granulator in this embodiment includes: Start the water pump 5 to add steel slag 9 into the barrel body 1, and the steel slag 9 can be stacked to the middle height in the barrel body 1; The water in the water storage jacket 3 flows into the inner barrel coil 21 under the action of the water pump 5, spirally flows upwards along the inner barrel coil 21, and cools the inside of the barrel body 1; As the pipe diameter of the inner barrel coil 21 becomes smaller, the gap 211 sucks the hot air at the top of the barrel body 1 into the coil 2 for heat exchange, and the steel slag 9 is cooled; The water in the inner barrel coil 21 returns to the water storage jacket 3 along the outer barrel coil 22, and the gas is washed and cooled before escaping through the balance pipe 4.

[0025] The amount of water in the water storage jacket 3 is configured to be twice the amount of water that can be heated to 50℃ by the heat released by the cooling of the steel slag 9, so that the heat can be completely absorbed by the water without boiling.

[0026] In this embodiment, the inner barrel coil 22 is spirally wound upwards and the pipe diameter gradually decreases, and the outer barrel coil 22 is gradually increased from top to bottom. Not only can the water cooling slag granulation be realized by the cooling water in the inner barrel coil 22, but also the hot air can be sucked into the coil 2 from the gap 211 at the thinnest part of the coil 2 by the Venturi effect, so that the cooling water and the hot air can directly exchange heat, the gas can be directly cooled, and the gas can be washed, so that the slag granulation can be carried out while the hot gas is treated, without waste gas and environmental pollution. In addition, the present embodiment adopts atmospheric pressure slag granulation, which has no pressure requirement for the equipment, can reduce the manufacturing cost of the equipment, and has no pressure safety risk during the slag granulation process. In addition, the present embodiment uses water to cool the steel slag 9, but the water does not contact the steel slag 9, so it will not consume water and produce waste water, further reducing the cost.

[0027] In this embodiment, asFigure 1 As shown, preferably, the atmospheric pressure slag tank also includes a one-way impeller 7 rotatably mounted inside the upper part of the tank body 1. (Because there are requirements for the rotation direction of the one-way impeller 7, the one-way impeller 7 is structurally configured to rotate only in a predetermined direction, such as through ratchet and pawl engagement, one-way bearing, etc.) Figure 1 As shown, with the notch 211 located to the right of the inner coil 21 inside the barrel 1, in order for the one-way impeller 7 located to the left of the notch to deliver hot air into the notch 211 from bottom to top, the one-way impeller 7 needs to be structurally configured to rotate only counterclockwise.

[0028] Steel slag 9 is poured into the barrel 1 through the feed inlet 8. During its descent, it drives the one-way impeller 7 to rotate in one direction. The hot air sprayed upwards from inside the barrel 1 also drives the one-way impeller 7 to rotate in the same direction. As the one-way impeller 7 rotates in its predetermined direction, it carries the hot air below the notch 211 inside the barrel 1 to the notch 211 position, while simultaneously blowing cold air from above the barrel 1 into the barrel 1. In other words, the function of the one-way impeller 7 is twofold: firstly, to ensure that the hot air reaches the notch 211 smoothly, and secondly, to simultaneously blow a small amount of cold air into the barrel 1.

[0029] like Figure 1 As shown, in order to better drive the one-way impeller 7 to rotate in the predetermined direction, the top of the barrel 1 is provided with a feed inlet 8. The outlet of the feed inlet 8 is exactly opposite to the half of the one-way impeller 7 away from the notch 211. In this way, more of the gravitational potential energy of the steel slag 9 can be effectively utilized, and the damage to the one-way impeller 7 can be avoided by forcing the one-way impeller 7 to rotate in a direction that cannot be rotated due to some steel slag 9 falling to the right side of the one-way impeller 7.

[0030] In this embodiment, as Figure 1 As shown, preferably, a gas collection hood 6 is provided at the notch 211.

[0031] Specifically, by collecting and guiding the air through the air collection hood 6, more air can enter the coil 2 through the gap 211.

[0032] In this embodiment, as Figure 1 As shown, preferably, the inner diameter of the barrel 1 gradually decreases from the middle to the top and bottom, that is, the top and bottom of the barrel 1 are thinner and the middle is relatively thicker.

[0033] Considering that the water storage jacket 3 is located at the lower end of the tank body 1, this arrangement can maximize the volume of the water storage jacket 3 while ensuring the stability of the tank body 1, so that the water storage jacket 3 can hold as much water as possible.

[0034] In this embodiment, as Figure 1 and Figure 2 As shown, preferably, the balance tube 4 extends upward to be flush with the top of the barrel 1.

[0035] In this embodiment, as shown in Figure 1 Preferably, the outer barrel pipe 22 is connected to the water storage jacket 3 at a position away from the water pump 5.

[0036] In this embodiment, as shown in Figure 1 Preferably, the balance pipe 4 is connected to the top wall of the water storage jacket 3 at a position close to the outlet of the outer barrel pipe 22. In this way, the gas can be quickly introduced into the balance pipe 4 after being washed and cooled, and then be released.

[0037] Based on the above ideal embodiments according to the present application, the above description can be changed and modified by relevant personnel without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. An atmospheric pressure slag septic tank, characterized in that, include: Barrel body (1); A coil (2) passes through the top wall of the barrel (1) to form an inner coil (21) and an outer coil (22). The inner coil (21) spirals upward from the middle of the barrel (1) along the inner wall of the barrel (1) and the diameter gradually decreases. A notch (211) is provided at the position with the smallest diameter. The outer coil (22) extends downward outside the barrel (1) and the diameter gradually increases. A water storage jacket (3) is provided on the outer peripheral wall of the lower end of the barrel (1), and its top wall is connected to an upwardly extending balance pipe (4). The lower end of the outer coil (22) of the barrel is connected to the water storage jacket (3). A water pump (5) is connected to the lower end of the water storage jacket (3) and the inner coil (21) of the bucket, and is used to pump water from the water storage jacket (3) into the inner coil (21).

2. The atmospheric pressure slag trap according to claim 1, characterized in that, It also includes a one-way impeller (7) that is rotatably installed at the upper end of the barrel (1). The one-way impeller (7) is passively rotated under the impact of falling steel slag (9) and the impact of upward sprayed hot air, so as to send hot air into the notch (211).

3. The atmospheric pressure slag trap according to claim 1 or 2, characterized in that, A gas collection hood (6) is provided at the notch (211).

4. The atmospheric pressure slag trap according to claim 1, characterized in that, The inner diameter of the barrel (1) gradually decreases from the middle to the top and bottom ends.

5. The atmospheric pressure slag septic tank according to claim 1, characterized in that, The balance tube (4) extends upward to be flush with the top of the barrel (1).

6. The atmospheric pressure slag trap according to claim 1, characterized in that, The external coil (22) of the bucket is connected to the side of the water storage jacket (3) away from the water pump (5).

7. The atmospheric pressure slag tank according to claim 6, characterized in that, The balance pipe (4) is connected to the top wall of the water storage jacket (3) near the outlet of the outer coil (22).

8. The atmospheric pressure slag tank according to claim 1, characterized in that, The water volume in the water storage jacket (3) is configured to absorb the heat released by the cooling of the steel slag (9) added to the barrel (1) without boiling.

9. The atmospheric pressure slag trap according to claim 1, characterized in that, The water pump (5) is a submersible pump located inside the water storage jacket (3), and its outlet is connected to the lower end of the inner coil (21) of the bucket.

10. A method for atmospheric pressure sludge treatment based on any one of claims 1-9 in an atmospheric pressure sludge treatment tank, characterized in that, include: Start the water pump (5) and add steel slag (9) into the barrel (1); Water in the water storage jacket (3) enters the inner coil (21) of the tank under the action of the water pump (5), and flows upward along the inner coil (21) to cool the inside of the tank (1); As the diameter of the coil (21) inside the barrel decreases, the notch (211) draws hot air from the top of the barrel (1) into the coil (2) for heat exchange, thus cooling the steel slag (9). Water in the inner coil (21) returns to the water storage jacket (3) along the outer coil (22), and gas escapes through the balance pipe (4) after being washed and cooled by water.

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