Environment-friendly blast furnace granulated slag blowing box and blast furnace granulated slag treatment system

Abstract

The utility model relates to an environment-friendly blast furnace granulated slag blowing box and a blast furnace granulated slag treatment system, which comprise a slag runner, a blowing box is arranged at the bottom of an output port of the slag runner, and the output direction of the blowing box is consistent with the output direction of the slag runner; the treatment assembly comprises a gas collecting hood, a purifier, a heat exchanger and a reservoir; the gas-collecting hood is arranged at the top of the output port of the slag runner, a gas outlet pipe is arranged at the top of the gas-collecting hood and is communicated with the purifier, the output port of the purifier is communicated with the heat exchanger, the output port of the heat exchanger is communicated with the reservoir, and the water outlet of the reservoir is communicated with the blowing box. According to the device, steam generated by cooling red slag is collected through the gas collecting hood, and harmful substances such as H2S and SOx in the steam are removed through the purifier, so that air pollution is avoided; and secondly, heat in the steam is collected through the heat exchanger, meanwhile, the steam is converted into condensate water, the condensate water is collected through the water storage pool, the condensate water can return to the blowing box to be recycled, and waste of water resources is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace slag treatment, in particular to an environmentally friendly blast furnace slag blowing box and a blast furnace slag treatment system. Background Art

[0002] The blowing box is one of the core equipment of the INBA slag process. It is a device for quenching slag and conveying slag. The working capacity of the blowing box determines the yield of the slag system. The blast furnace slag flows into the blowing box from the slag ditch head, and is quenched into slag by the granulated water in the blowing box, and is sent to the slag hopper through the slag ditch. When the slag flows down from the slag ditch through the ditch head, the water spray plate of the slag blowing box sprays high-speed and high-density water jets from top to bottom to quench the slag into granulated slag to form slag, and then transports it to the slag filtration facility through the slag ditch.

[0003] The blowing box device of the blast furnace in the prior art includes a slag ditch and a box body connected to the ditch head of the slag ditch, which effectively eliminates the phenomenon of slag hanging on the ditch head of the slag ditch, and the blowing box is not easy to accumulate slag, avoiding the occurrence of explosion phenomenon. However, the steam containing a large amount of harmful gases such as H2S and SOx generated in the blowing box is directly discharged into the atmosphere through the explosion-proof hole, which not only pollutes the environment, but also wastes water and loses the thermal energy of the steam. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects in the prior art that the water vapor generated by the blast furnace slag blowing easily causes air pollution and wastes resources.

[0005] In order to solve the above technical problems, the utility model provides an environmentally friendly blast furnace slag blowing box, comprising:

[0006] A slag ditch, wherein a blowing box is provided at the bottom of the output port of the slag ditch, and the output direction of the blowing box is consistent with the output direction of the slag ditch;

[0007] A processing component, the processing component includes an air collecting hood, a purifier, a heat exchanger and a water reservoir; the air collecting hood is arranged on the top of the output port of the slag ditch, and an air outlet pipe is arranged on the top of the air collecting hood, the air outlet pipe is connected with the purifier, the output port of the purifier is connected with the heat exchanger, the output port of the heat exchanger leads to the water reservoir, and the drain port of the water reservoir is connected with the blowing box.

[0008] In one embodiment of the present invention, a vacuum generator is provided between the air outlet pipe and the purifier.

[0009] In one embodiment of the utility model, a support frame is provided at the bottom of the gas collecting hood, the support frame is provided on both sides of the slag ditch and the blowing box, and the gas collecting hood is provided on the support frame.

[0010] In one embodiment of the utility model, the air collecting hood includes a fixed air hood and a sliding air hood that fit each other, the sliding air hood is slidably connected to one end of the support frame close to the slag ditch and the blowing box, and the fixed air hood is detachably connected to the other end of the support frame.

[0011] In one embodiment of the utility model, a track is arranged on the support frame, and a roller cooperating with the track is arranged at the bottom of the sliding air cover.

[0012] In one embodiment of the present invention, a sealing gasket is provided at the joint between the sliding air hood and the fixed air hood.

[0013] In one embodiment of the present invention, an observation hole is provided on the surface of the sliding air hood.

[0014] In one embodiment of the utility model, a water pump is provided between the blowing box and the water reservoir.

[0015] A blast furnace slag treatment system comprises the environmentally friendly blast furnace slag blowing box.

[0016] The above technical solution of the utility model has the following advantages compared with the prior art:

[0017] The utility model describes an environmentally friendly blast furnace slag blowing box and a blast furnace slag treatment system. The utility model collects the steam generated by cooling the red slag through a gas collecting hood, and a purifier removes harmful substances such as H2S and SOx in the steam to avoid air pollution; secondly, the heat in the steam is collected by a heat exchanger and the steam is converted into condensed water. The condensed water is collected in a water reservoir, and the condensed water can be returned to the blowing box for recycling, thereby reducing the waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure with the middle gas collecting hood opened;

[0021] Figure 3 for Figure 1 Schematic diagram of the local structure at A in the middle;

[0022] Explanation of the reference numerals in the drawings in the specification: 1. slag ditch; 2. blowing box; 3. air collecting hood; 4. purifier; 5. heat exchanger; 6. water reservoir; 7. vacuum generator; 8. support frame; 9. roller; 10. water pump; 31. sliding air hood; 32. fixed air hood; 33. air outlet pipe; 34. sealing gasket; 35. observation hole; 81. track. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0024] Embodiment 1

[0025] Reference Figure 1-Figure 3 As shown, the utility model discloses an environmentally friendly blast furnace slag blowing box, comprising:

[0026] A slag ditch 1, wherein a blowing box 2 is provided at the bottom of the output port of the slag ditch 1, and the output direction of the blowing box 2 is consistent with the output direction of the slag ditch 1;

[0027] A processing component, the processing component includes an air collecting hood 3, a purifier 4, a heat exchanger 5 and a water reservoir 6; the air collecting hood 3 is arranged at the top of the output port of the slag ditch 1, and an air outlet pipe 33 is arranged on the top of the air collecting hood 3, the air outlet pipe 33 is connected with the purifier 4, the output port of the purifier 4 is connected with the heat exchanger 5, the output port of the heat exchanger 5 is connected to the water reservoir 6, and the drain port of the water reservoir 6 is connected with the blowing box 2.

[0028] It can be imagined that in the utility model, the blowing box 2 is arranged at the bottom of the output end of the slag ditch 1, and the red slag output from the slag ditch 1 contacts the water sprayed from the blowing box 2. After the high-pressure water impacts the red slag, it is rapidly cooled and granulated into granular water slag, generating a large amount of steam. The generated steam is collected by the gas collecting hood 3 in the processing component. After the steam enters the purifier 4, harmful substances such as H2S and SOx in the steam are removed, and then enters the heat exchanger 5. The steam exchanges heat in the heat exchanger 5. While collecting the heat of the steam, the heat exchanger 5 converts the steam into condensed water, and the condensed water is collected through the water reservoir 6. The water in the water reservoir 6 can be used for other process flows on the one hand, and can be returned to the blowing box 2 for reuse on the other hand, so as to achieve the purpose of recycling.

[0029] The utility model collects the steam generated by cooling the red slag through the gas collecting hood 3, and the purifier 4 removes harmful substances such as H2S and SOx in the steam to avoid air pollution; secondly, the heat in the steam is collected by the heat exchanger 5 and the steam is converted into condensed water, and the water reservoir 6 collects the condensed water, which can be returned to the blowing box 2 for recycling, thereby reducing the waste of water resources.

[0030] Furthermore, a vacuum generator 7 is provided between the air outlet pipe 33 and the purifier 4 .

[0031] Specifically, by generating negative pressure through the vacuum generator 7, the generated steam can be collected to a greater extent, reducing the overflow of steam, thereby avoiding the pollution of the air by the overflowed steam.

[0032] Furthermore, a support frame 8 is provided at the bottom of the gas collecting hood 3 , and the support frame 8 is provided on both sides of the slag ditch 1 and the blowing box 2 , and the gas collecting hood 3 is provided on the support frame 8 .

[0033] Specifically, the entire air collecting hood 3 is installed on the support frame 8, and the air collecting hood 3 includes a fixed air hood 32 and a sliding air hood 31 that fit each other. The sliding air hood 31 is slidably connected to one end of the support frame 8 close to the slag ditch 1 and the blowing box 2, and the fixed air hood 32 is detachably connected to the other end of the support frame 8.

[0034] It can be seen that the entire air hood 3 is divided into two parts, a fixed air hood 32 and a sliding air hood 31, to realize the opening and closing of the air hood, which is convenient for subsequent maintenance and cleaning. Specifically, the sliding air hood 31 is close to the slag groove 1 and the blowing box 2, and slides on the support frame 8; the other end is the fixed air hood 32, and the air outlet pipe 33 is set at one end of the fixed air hood 32. During the water slag treatment process, the fixed air hood 32 and the sliding air hood 31 are in a closed state. After long-term use, slag will be generated inside, and the slag needs to be cleaned in time. One end of the sliding air hood 31 can be opened to clean the slag inside.

[0035] Furthermore, a track 81 is disposed on the support frame 8 , and a roller 9 cooperating with the track 81 is disposed at the bottom of the sliding air cover 31 .

[0036] As a preferred solution of the utility model, the sliding air hood 31 is slidably connected to the support frame 8 via a roller 9 , and the roller 9 slides in a track 81 on the support frame 8 .

[0037] Furthermore, a sealing gasket 34 is provided at the joint between the sliding air hood 31 and the fixed air hood 32 .

[0038] Specifically, by providing a sealing ring between the sliding air hood 31 and the fixed air hood 32, the sealing between the sliding air hood 31 and the fixed air hood 32 is improved to avoid steam overflow and air pollution caused by poor sealing during use. As a preferred solution of the utility model, in order to improve the steam collection rate and the sealing of the air hood, high temperature resistant tarpaulins can be added on both sides of the support frame 8 to prevent steam from overflowing from both sides of the support frame 8, while improving the collection rate of the air hood 3, and ensuring that all steam is purified by the purifier 4 as much as possible.

[0039] Furthermore, an observation hole 35 is opened on the surface of the sliding air cover 31 .

[0040] Specifically, the entire gas collecting hood 3 is in a closed state during use, and the production conditions inside the gas collecting hood need to be inspected through the observation hole 35 .

[0041] Furthermore, a water pump 10 is provided between the blowing box 2 and the water reservoir 6 ; the water pump 10 provides power to pump the water in the water reservoir 6 into the blowing box 2 .

[0042] Embodiment 2

[0043] A blast furnace slag treatment system comprises the environmentally friendly blast furnace slag blowing box described in the first embodiment.

[0044] In summary, the utility model introduces an environmentally friendly blast furnace slag blowing box and a blast furnace slag treatment system. The utility model collects the steam generated by cooling the red slag through the gas collecting hood 3, and the purifier 4 removes harmful substances such as H2S and SOx in the steam to avoid air pollution; secondly, the heat in the steam is collected by the heat exchanger 5 and the steam is converted into condensed water. The water reservoir 6 collects the condensed water, and the condensed water can be returned to the blowing box 2 for recycling, thereby reducing the waste of water resources.

[0045] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An environmentally friendly blast furnace slag blowing box, characterized in that: include: A slag ditch, wherein a blowing box is provided at the bottom of the output port of the slag ditch, and the output direction of the blowing box is consistent with the output direction of the slag ditch; A processing component, the processing component includes an air collecting hood, a purifier, a heat exchanger and a water reservoir; the air collecting hood is arranged on the top of the output port of the slag ditch, and an air outlet pipe is arranged on the top of the air collecting hood, the air outlet pipe is connected with the purifier, the output port of the purifier is connected with the heat exchanger, the output port of the heat exchanger leads to the water reservoir, and the drain port of the water reservoir is connected with the blowing box.

2. The environmentally friendly blast furnace slag blowing box according to claim 1 is characterized in that: A vacuum generator is arranged between the air outlet pipe and the purifier.

3. The environmentally friendly blast furnace slag blowing box according to claim 1 is characterized in that: A support frame is provided at the bottom of the gas collecting hood, the support frame is arranged on both sides of the slag ditch and the blowing box, and the gas collecting hood is arranged on the support frame.

4. The environmentally friendly blast furnace slag blowing box according to claim 3 is characterized in that: The air collecting hood comprises a fixed air hood and a sliding air hood which fit each other. The sliding air hood is slidably connected to one end of the support frame close to the slag ditch and the blowing box, and the fixed air hood is detachably connected to the other end of the support frame.

5. The environmentally friendly blast furnace slag blowing box according to claim 4 is characterized in that: The support frame is provided with a track, and the bottom of the sliding air cover is provided with a roller matched with the track.

6. The environmentally friendly blast furnace slag blowing box according to claim 4 is characterized in that: A sealing gasket is provided at the joint between the sliding air hood and the fixed air hood.

7. The environmentally friendly blast furnace slag blowing box according to claim 4 is characterized in that: An observation hole is provided on the surface of the sliding air cover.

8. The environmentally friendly blast furnace slag blowing box according to claim 1 is characterized in that: A water pump is arranged between the blowing box and the water reservoir.

9. A blast furnace slag treatment system, characterized in that: It comprises an environmentally friendly blast furnace slag blowing box according to any one of claims 1-8.

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