Double-grouting cooling column with internal and external circulation and blast furnace

Abstract

The application discloses an internal-external circulation type double-grouting cooling column and a blast furnace, wherein the internal-external circulation type double-grouting cooling column comprises a cooling column body with a cavity inside, a front grouting pipe arranged inside the cooling column body along a center line direction of the cooling column body, a rear grouting pipe arranged on an outer wall of the cooling column body, a water outlet pipe and a water inlet pipe inserted into the outer wall of the cooling column body, and the cooling column body comprises a cooling cylinder and a front cap and a rear cover respectively sealing two ends of the cooling cylinder, and a center pipe and a distribution ring are further arranged in the cavity, wherein the distribution ring is sleeved on the front grouting pipe and forms a front chamber cavity between the distribution ring and the front cap; the center pipe is in a cylindrical shape, is sleeved outside the front grouting pipe, and two ends of the center pipe are fixed on the distribution ring and the rear cover respectively, a chamber between the center pipe and the outer wall of the front grouting pipe is a water inlet flow channel, and a chamber between the outer wall of the center pipe and the inner wall of the cooling cylinder is a water outlet flow channel. The internal-external circulation type double-grouting cooling column has a high cooling effect.

Description

Technical Field

[0001] This application relates to the field of blast furnace technology, and in particular to a dual-grouting cooling column with internal and external circulation and a blast furnace. Background Technology

[0002] In blast furnace production, cooling columns are crucial cooling equipment for ensuring the safe and stable operation of the blast furnace. Their core function is to serve as an effective emergency cooling measure when the blast furnace cooling wall is damaged. In practice, the blast furnace shell and the damaged cooling wall are drilled through, the cooling column is then installed and grouted, and finally, cooling water is introduced into the cooling column to continuously cool the damaged area of ​​the cooling wall, thereby maintaining the normal operation of the blast furnace and ensuring production safety.

[0003] However, traditional cooling columns still have significant limitations in practical applications. On the one hand, the structural design of traditional cooling columns using a single-stage grouting process makes the front end of the product prone to wear and damage in the harsh blast furnace environment, affecting its service life. On the other hand, although the subsequently developed double-grouting structure cooling columns have improved the wear resistance of the front end to some extent, they have introduced new technical problems, namely, the difficulty in achieving uniform distribution of cooling water within the internal space of the column. This uneven distribution of cooling water directly restricts the cooling effect. Utility Model Content

[0004] To address the technical problems existing in the prior art, this application proposes an internal and external circulation type double grouting cooling column and a blast furnace. The internal and external circulation type double grouting cooling column has two grouting channels that can fill the front end of the cooling column and the space between the cooling column and the blast furnace wall with grout, thereby increasing the connection strength and improving the wear condition of the front end of the cooling column. Furthermore, since the cooling water in the inlet and outlet channels of the cooling column has low resistance, the cooling effect can be improved.

[0005] This application proposes an internal and external circulation dual-grouting cooling column, comprising a cooling column body with an internal cavity, a front grouting pipe passing through the cooling column body along its centerline, a rear grouting pipe on the outer wall of the cooling column body, and an outlet pipe and an inlet pipe inserted into the outer wall of the cooling column body. The cooling column body includes a cooling cylinder and a front cap and a rear cap respectively sealing both ends of the cooling cylinder. The cavity also contains a central pipe and a distribution ring, wherein the distribution ring is sleeved on the front grouting pipe and forms a gap with the front cap. The anterior chamber cavity; the central tube is cylindrical and sleeved outside the front grouting pipe. The two ends of the central tube are fixed to the distribution ring and the rear plug, respectively. The cavity between the central tube and the outer wall of the front grouting pipe is the water inlet channel, and the cavity between the outer wall of the central tube and the inner wall of the cooling cylinder is the water outlet channel. The distribution ring is provided with a water inlet hole and a water outlet hole. The water inlet hole is located between the water inlet channel and the anterior chamber cavity, and the water outlet hole is located between the water outlet channel and the anterior chamber cavity. The water outlet pipe is connected to the water outlet channel, and the water inlet pipe is connected to the water inlet channel.

[0006] Optionally, the water inlet and the water outlet are respectively arranged at different radii along the circumferential direction of the distribution ring.

[0007] Optionally, a flange is provided on the outer wall of the cooling cylinder to limit the installation depth of the internal and external circulation dual grouting cooling column. An inclined through hole is provided on the inclined outer end face of the flange, and a diversion groove is provided on the end face of the flange facing the front cap. The inclined through hole and the diversion groove are connected. The rear grouting pipe is inclinedly arranged on the inclined outer end face of the flange and is connected to the inclined through hole.

[0008] Optionally, the range of the angle R between the centerline of the rear grouting pipe and the centerline of the front grouting pipe is: 60°≥R≥30°.

[0009] Optionally, the distance between the outer surface of the distribution ring and the inner wall of the front cap ranges from 15mm to 40mm.

[0010] Optionally, the ratio of the distance from the inner wall of the central tube to the outer wall of the front grouting pipe to the distance from the outer wall of the central tube to the inner wall of the cooling cylinder is in the range of 1:3-3:1.

[0011] Optionally, the anterior chamber cavity is further provided with a flow divider plate, which is annular, with one end disposed on the distribution ring and located between the outlet and the inlet.

[0012] Optionally, the cooling cylinder includes a steel cylinder and a copper chamber, which are welded together.

[0013] This application also proposes a blast furnace, wherein the furnace wall includes a furnace shell and a cooling wall disposed on its inner wall, and a refractory layer is provided between the furnace shell and the cooling wall. As described above, an internal and external circulation double grouting cooling column is inserted through the furnace wall. The copper chamber is installed in a position corresponding to the installation position of the cooling wall so as to cool the cooling wall by the copper chamber.

[0014] Optionally, in use, the flange of the internal and external circulation double grouting cooling column is pressed against the furnace wall of the blast furnace, and there is a grouting filling layer between the outer wall of the internal and external circulation double grouting cooling column and the furnace wall. The grouting material in the grouting filling layer is formed after entering the filling space between the cooling column and the furnace wall through the inclined through hole and the diversion groove on the rear grouting pipe flange.

[0015] The internal and external circulation dual-grouting cooling column proposed in this application has two grouting channels to fill the front end of the cooling column and the space between the cooling column and the blast furnace wall with grout. This not only increases the connection strength between the furnace wall and the cooling column and improves the wear condition of the front end of the cooling column, but also enhances the cooling effect due to the low resistance of the cooling water in the inlet and outlet channels of the cooling column. Attached Figure Description

[0016] The preferred embodiments of this application will now be described in further detail with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a three-dimensional structural diagram of an internal and external circulation type double grouting cooling column according to an embodiment of this application;

[0018] Figure 2 yes Figure 1 The structure shown is a structural view along direction C;

[0019] Figure 3 yes Figure 2 The structure shown is a cross-sectional view along BB;

[0020] Figure 4 yes Figure 3 The structure shown is a cross-sectional view along AA;

[0021] Figure 5 yes Figure 4 A magnified view of a portion of the structure shown at point E;

[0022] Figure 6 This is a perspective view of another internal and external circulation type dual grouting cooling column according to an embodiment of this application;

[0023] Figure 7 This is a schematic diagram of the internal and external circulation double grouting cooling column installed on a blast furnace according to an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100. Internal and external circulation type double grouting cooling column; 101. Cooling column body; 102. Front grouting pipe; 103. Rear grouting pipe; 104. Water outlet pipe; 105. Water inlet pipe; 1011. Cooling cylinder; 1012. Front cap; 1013. Rear plug; 114. Central pipe; 115. Distribution ring; 1013. Steel cylinder; 1014. Copper chamber; 107. Water inlet channel; 108. Water outlet channel; 1 151. Water inlet; 1152. Water outlet; 106. Front chamber cavity; 109. Flange; 1091. Inclined through hole; 1092. Diversion groove; 1093. Inclined outer end face; 1061. Diversion plate; 601. Furnace wall; 6011. Furnace shell; 6012. Cooling wall; 6013. Refractory layer; 1113. Rear plug; 602. Grouting filling layer; 603. Front grouting filling layer. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the following detailed description, reference can be made to the accompanying drawings, which form part of this application and illustrate specific embodiments of the present application. In the drawings, similar reference numerals describe substantially similar components in different figures. Specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to implement the technical solutions of the present application. It should be understood that other embodiments may also be utilized, or structural, logical, or electrical changes may be made to the embodiments of the present application.

[0028] Figure 1 This is a three-dimensional structural diagram of an internal and external circulation type double grouting cooling column according to an embodiment of this application. Figure 2 yes Figure 1 The structure shown is a structural view along direction A. Figure 3 yes Figure 2 The structure shown is a cross-sectional view along BB. Figure 4 yes Figure 2 The structure shown is a cross-sectional view along CC. Combined with... Figures 1-4As shown, the internal and external circulation type double grouting cooling column 100 includes a cooling column body 101 with an internal cavity, a front grouting pipe 102 passing through it along the center line of the cooling column body, a rear grouting pipe 103 on the outer wall of the cooling column body 101, and an outlet pipe 104 and an inlet pipe 105 inserted into the outer wall of the cooling column body 101. The cooling column body 101 includes a cooling cylinder 1011 and a front cap 1012 and a rear cap 1113 respectively sealing both ends of the cooling cylinder 1011. A central pipe 114 and a distribution ring 115 are also provided in the cavity, wherein the distribution ring 115 is sleeved on the front grouting pipe 102 and forms a front chamber cavity 106 between it and the front cap 1012. In some embodiments of this application, optionally, the cooling cylinder 1011 includes a steel cylinder 1013 and a copper chamber 1014, which are welded together.

[0029] Furthermore, the central tube 114 is cylindrical and is sleeved on the outside of the front grouting pipe 102. The two ends of the central tube 114 are fixed on the distribution ring 115 and the rear plug 1113, respectively. The cavity between the central tube 114 and the outer wall of the front grouting pipe 102 is the water inlet channel 107, and the cavity between the outer wall of the central tube 114 and the inner wall of the cooling cylinder 1011 is the water outlet channel 108. The distribution ring 115 is provided with a water inlet hole 1151 and a water outlet hole 1152. The water inlet hole 1151 is located between the water inlet channel 107 and the front chamber cavity 106, and the water outlet hole 1152 is located between the water outlet channel 108 and the front chamber cavity 106. The water outlet pipe 104 is connected to the water outlet channel 108, and the water inlet pipe 105 is connected to the water inlet channel 107. In some embodiments of this application, optionally, the ratio of the distance from the inner wall of the central tube to the outer wall of the front grouting pipe to the distance from the outer wall of the central tube to the inner wall of the cooling cylinder is 5mm-20mm. Figure 5 yes Figure 4 A magnified view of a portion of the structure shown at point E. (Combined with...) Figure 4 and Figure 5 As shown, the distance from the inner wall of the central pipe to the outer wall of the front grouting pipe is represented by Q, and the distance from the outer wall of the central pipe to the inner wall of the cooling cylinder is represented by R. The ratio of Q:R is in the range of 1:3-3:1, and the optimal ratio is 1:1. Under this ratio, the cooling water in the inlet and outlet channels has a better cooling effect.

[0030] The internal and external circulation dual-grouting cooling column proposed in this application has two grouting channels that can fill the front end of the cooling column and the space between the cooling column and the blast furnace wall with grout. This not only increases the connection strength between the furnace wall and the cooling column and improves the wear condition of the front end of the cooling column, but also improves the cooling effect because the cooling water in the inlet and outlet channels of the cooling column has low resistance.

[0031] Figure 6 This is a perspective view of another internal and external circulation type dual-grouting cooling column according to an embodiment of this application. Figure 6 As shown in the schematic diagram, the distribution ring 115 of the internal and external circulation dual-grouting cooling column 100 is visible. Water inlet holes 1151 and water outlet holes 1152 on the distribution ring 115 are spaced apart at different radii along the circumference of the distribution ring 115. The multiple water inlet holes 1151 distributed along the circumference of the distribution ring 115 reduce the resistance to the incoming water flow. Similarly, the multiple water outlet holes 1052 distributed along the circumference of the distribution ring 115 also reduce the resistance to the outgoing water flow. In some embodiments of this application, optionally, the distance between the outer surface of the distribution ring 115 and the inner wall of the front cap 1012 ranges from 15mm to 40mm. Figure 3 As shown, the distance between the outer surface of the distribution ring 115 and the inner wall of the front cap 1012 is represented by R, and the range of R is 15mm-40mm. Within this range, the scouring of the front chamber cavity by the cooling water can be reduced, the flow velocity of the cooling water can be eased, and the cooling water can flow more smoothly from the outlet hole to the outlet channel.

[0032] See also Figure 3 and Figure 4 As shown, a flange 109 is provided on the outer wall of the cooling cylinder 1011 to limit the installation depth of the internal and external circulation dual-grouting cooling column 100. An inclined through hole 1091 is provided on the inclined outer end face 1093 of the flange 109, and a diversion groove 1092 is provided on the end face of the flange 109 facing the front cap 1012. The inclined through hole 1091 and the diversion groove 1092 are connected. The rear grouting pipe 103 is inclinedly arranged on the inclined outer end face 1093 of the flange 109 and is connected to the inclined through hole 1091. Grout can be injected between the outer surface of the blast furnace wall and the cooling column through the rear grouting pipe to enhance the bonding strength between the cooling column and the blast furnace wall.

[0033] In some embodiments of this application, optionally, the angle M between the centerline L of the rear grouting pipe 103 and the centerline T of the front grouting pipe 102 is in the range of: 60° ≥ M ≥ 30°. This allows the grout in the rear grouting pipe to flow efficiently between the outer surface of the cooling column and the blast furnace wall.

[0034] See also Figure 6 As shown, a flow divider 1061 is also provided in the anterior chamber cavity 106. The flow divider 1061 is annular, with one end disposed on the distribution ring 115 and located between the outlet 1152 and the inlet 1151 of the distribution ring 115. The flow divider 1061 can extend the flow channel of the inlet water, thereby allowing the inlet water to flow more smoothly from the outlet hole to the outlet flow channel.

[0035] Figure 7 This is a schematic diagram of the internal and external circulation dual-grouting cooling column structure installed on a blast furnace, according to an embodiment of this application. Figure 7The structure shown includes a schematic diagram of part of the blast furnace wall. Figure 7 and Figure 3 As shown in the figure, this application embodiment also proposes a blast furnace (not shown in the figure). The furnace wall 601 of the blast furnace includes a furnace shell 6011 and a cooling wall 6012 disposed on its inner wall. A refractory layer 6013 is also provided between the furnace shell 6011 and the cooling wall 6012. The internal and external circulation double grouting cooling column is installed on the furnace wall 601. The copper chamber 1014 of the internal and external circulation double grouting cooling column is installed in a position corresponding to the installation position of the cooling wall 6012, so as to better utilize the copper chamber 1014 to cool the cooling wall 6012.

[0036] In some embodiments of this application, optionally, during use, the flange 109 of the internal and external circulation dual grouting cooling column 100 abuts against the furnace wall 601 of the blast furnace. A grouting filling layer 602 is formed between the outer wall of the internal and external circulation dual grouting cooling column 100 and the furnace wall. The grouting material in the grouting filling layer 602 is formed after entering the filling space between the cooling column and the furnace wall 601 through the inclined through-hole 1091 and the diversion groove 1092 on the flange via the rear grouting pipe 103. Additionally, a front grouting filling layer 603 can be formed on the front end face of the cooling column via the front grouting pipe 102, which can protect the cooling column from corrosion and damage by materials inside the furnace.

[0037] In summary, the internal and external circulation dual-grouting cooling column proposed in this application embodiment has a front grouting pipe and a rear grouting pipe. The front grouting pipe can fill the front end of the cooling column with grout, thereby forming a protective layer at the front end of the cooling column and reducing damage to the front end of the cooling column. The rear grouting pipe can fill the gap between the blast furnace wall and the outer surface of the cooling column with grout, enhancing the strength and tightness of the connection between the two. Furthermore, in the cooling column of this application embodiment, both the inlet and outlet water channels have a high contact area with the position to be cooled, improving the heat dissipation capacity of the cooling water.

[0038] The blast furnace proposed in this application is equipped with internal and external circulation double grouting cooling columns, which can improve the cooling effect and wear resistance of the blast furnace wall.

[0039] The above embodiments are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art can make various changes and modifications without departing from the scope of this application. Therefore, all equivalent technical solutions should also fall within the scope of this application.

Claims

1. A dual-grouting cooling column with internal and external circulation, comprising a cooling column body with an internal cavity, a front grouting pipe passing through the cooling column body along its centerline, a rear grouting pipe on the outer wall of the cooling column body, and an outlet pipe and an inlet pipe inserted into the outer wall of the cooling column body, characterized in that, The cooling column body includes a cooling cylinder and a front cap and a rear plug that seal both ends of the cooling cylinder. The cavity also contains a central tube and a distribution ring. The distribution ring is sleeved on the front grouting pipe and forms a front chamber cavity with the front cap. The central tube is cylindrical and sleeved on the outside of the front grouting pipe. Both ends of the central tube are fixed to the distribution ring and the rear plug, respectively. The cavity between the central tube and the outer wall of the front grouting pipe is a water inlet channel, and the cavity between the outer wall of the central tube and the inner wall of the cooling cylinder is a water outlet channel. The distribution ring has a water inlet hole and a water outlet hole. The water inlet hole is located between the water inlet channel and the front chamber cavity, and the water outlet hole is located between the water outlet channel and the front chamber cavity. The water outlet pipe is connected to the water outlet channel, and the water inlet pipe is connected to the water inlet channel.

2. The internal and external circulation dual-grouting cooling column according to claim 1, characterized in that, The water inlet and the water outlet are respectively arranged at different radii along the circumference of the distribution ring.

3. The internal and external circulation dual-grouting cooling column according to claim 1, characterized in that, A flange is provided on the outer wall of the cooling cylinder to limit the installation depth of the internal and external circulation dual grouting cooling column. An inclined through hole is provided on the inclined outer end face of the flange. A diversion groove is provided on the end face of the flange facing the front cap. The inclined through hole and the diversion groove are connected. The rear grouting pipe is inclinedly arranged on the inclined outer end face of the flange and is connected to the inclined through hole.

4. The internal and external circulation dual-grouting cooling column according to claim 3, characterized in that, The range of the angle M between the centerline of the rear grouting pipe and the centerline of the front grouting pipe is: 60°≥M≥30°.

5. The internal and external circulation dual-grouting cooling column according to claim 1, characterized in that, The distance between the outer surface of the distribution ring and the inner wall of the front cap ranges from 15mm to 40mm.

6. The internal and external circulation dual-grouting cooling column according to claim 1, characterized in that, The ratio of the distance from the inner wall of the central pipe to the outer wall of the front grouting pipe to the distance from the outer wall of the central pipe to the inner wall of the cooling cylinder is in the range of 1:3-3:

1.

7. The internal and external circulation dual-grouting cooling column according to claim 1, characterized in that, The anterior chamber cavity is also provided with a flow divider plate, which is annular, with one end of which is set on the distribution ring and located between the outlet and the inlet.

8. The internal and external circulation dual-grouting cooling column according to claim 1, characterized in that, The cooling cylinder includes a steel cylinder and a copper chamber, which are welded together.

9. A blast furnace, wherein the furnace wall comprises a furnace shell and a cooling wall disposed on its inner wall, and a refractory layer is further provided between the furnace shell and the cooling wall, characterized in that, The internal and external circulation double grouting cooling column as described in any one of claims 1-8 is installed on the furnace wall, wherein the cooling cylinder of the internal and external circulation double grouting cooling column includes a copper chamber, and the copper chamber is installed in a position corresponding to the installation position of the cooling wall so as to use the copper chamber to cool the cooling wall.

10. The blast furnace according to claim 9, characterized in that, The flange of the internal and external circulation double grouting cooling column is pressed against the furnace wall of the blast furnace. There is a grouting filling layer between the outer wall of the internal and external circulation double grouting cooling column and the furnace wall. The grouting material in the grouting filling layer is formed after entering the filling space between the cooling column and the furnace wall through the inclined through hole and the diversion groove on the rear grouting pipe flange.

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