CN215856194U - Blast furnace cooling wall structure - Google Patents

Abstract

The utility model discloses a blast furnace cooling wall structure, which comprises a plurality of layers of water tanks surrounding the outer wall of a blast furnace; the upper and lower adjacent water tanks are communicated through a communicating pipe; the bottom water tank in the water tanks is respectively communicated with a cooling water ring pipe through a water inlet pipeline and the top water tank in the water tanks through a water outlet pipeline; each water tank is internally provided with an annular middle partition plate which divides the inner cavity of the water tank into an inner annular chamber and an outer annular chamber; the middle partition plate is provided with a notch for communicating the inner annular chamber with the outer annular chamber; the external annular chamber is communicated with a water inlet pipeline or a communicating pipe; the inner annular chamber is communicated with a communicating pipe or a water outlet pipeline; a return water branch pipe communicated with the cooling water ring pipe is arranged on the communicating pipe; the water inlet pipeline, the water outlet pipeline and the communicating pipe are respectively provided with a thermocouple; and the water inlet pipeline, the communicating pipe and the return water branch pipe are respectively provided with a control valve. The utility model has the characteristics of proper thickness of the blast furnace slag skin, uniform circumference and the like.

Description

Blast furnace cooling wall structure

Technical Field

The utility model relates to a cooling wall, in particular to a blast furnace cooling wall structure.

Background

In the blast furnace smelting process, the thickness of the slag crust is directly related to whether the blast furnace can normally produce. When the slag crust is too thick, the hung slag crust can influence the operation of the blast furnace and even destroy the distribution of blast furnace gas, thus causing unsmooth blast furnace production; when the slag crust is too thin, the refractory material in the blast furnace can be lost by high-temperature fire, the safety of the cooling wall of the blast furnace can be threatened, and therefore, the thickness of the slag crust needs to be stably maintained within a certain range. The cooling wall of the blast furnace in the conventional structure is divided into four layers of a bottom water tank, a middle and lower water tank, a middle and upper water tank and a top water tank, and the four layers of water tanks are sequentially communicated; the bottom water tank is close to the furnace waist part, the cooling requirement is high, the top water tank is close to the top of the blast furnace, and the cooling requirement is low. The stabilization of the blast furnace slag crust is realized through the cooling of the water tank to the blast furnace. However, because the four layers of water tanks are communicated, when the bottom water tank is too thick corresponding to the slag crust at the position of the blast furnace and the inflow of cooling water needs to be enhanced, the temperature of the middle and lower water tanks, the middle and upper water tanks and the top water tank is changed simultaneously, the slag crust at the corresponding positions of the middle and lower water tanks, the middle and upper water tanks and the top water tank is too thick, and the normal production of the blast furnace is influenced.

And because the four layers of water tanks are used for cooling the blast furnace by sleeving the blast furnace in the circumferential direction, the thickness of the circumferential slag crust is inconsistent due to a single water inlet, and the distribution of blast furnace gas is influenced.

In addition, at present, the thickness inspection of the slag crust still means that workers regularly inspect the thermocouple, and adjust the corresponding valve according to the temperature of the thermocouple, so that the slag crust is more temperature and the thickness is more appropriate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a blast furnace cooling wall structure which enables the thickness of slag crust to be uniform circumferentially and is suitable up and down.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

a blast furnace cooling wall structure comprises a plurality of layers of water tanks surrounding the outer wall of a blast furnace; the upper and lower adjacent water tanks are communicated through a communicating pipe; the bottom water tank in the water tanks is respectively communicated with a cooling water ring pipe through a water inlet pipeline and the top water tank in the water tanks through a water outlet pipeline; each water tank is internally provided with an annular middle partition plate which divides the inner cavity of the water tank into an inner annular chamber and an outer annular chamber; the middle partition plate is provided with a notch for communicating the inner annular chamber with the outer annular chamber; the external annular chamber is communicated with a water inlet pipeline or a communicating pipe; the inner annular chamber is communicated with a communicating pipe or a water outlet pipeline; a return water branch pipe communicated with the cooling water ring pipe is arranged on the communicating pipe; the water inlet pipeline, the water outlet pipeline and the communicating pipe are respectively provided with a thermocouple; and the water inlet pipeline, the communicating pipe and the return water branch pipe are respectively provided with a control valve.

In the blast furnace cooling wall structure, the water inlet pipeline, the communicating pipe or the return branch pipe are communicated with the same circumferential position of the water tank and are arranged up and down; the gaps of the middle partition plate and the communication positions of the communication pipe, the water inlet pipeline or the water outlet pipeline are symmetrically distributed on the circumference.

In the above blast furnace stave structure, the communication pipe communicates the upper part of the lower water tank and the lower part of the upper water tank.

The blast furnace cooling wall structure also comprises a control assembly; the control component comprises a CPU; the thermocouples on the water inlet pipeline, the water outlet pipeline and the communicating pipe are respectively connected with the signal input end of the CPU; and the signal output end of the CPU is respectively connected with the water inlet pipeline, the communicating pipe and the control valve on the water return branch pipe.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the utility model separates the water inlet quantity of the middle and lower water tanks from the water outlet quantity of the bottom water tank by arranging the water return control valve and the water return pipeline between the bottom water tank and the middle and lower water tanks, thereby thoroughly changing the cooling linkage at the upper and lower positions, weakening the influence of the lower water tank on the middle and upper water tanks, and leading the cooling effect of different parts of the blast furnace to be better and have pertinence. In addition, each water tank is divided into an inner layer and an outer layer through the middle partition plate, so that the water temperature of the water tanks is better and uniform in the circumferential direction, and the slag crust is more uniform in the circumferential direction. The utility model has the characteristics of proper thickness of the blast furnace slag skin, uniform circumference and the like.

In addition, the control assembly is adopted to detect and control the water temperature of the water tank, so that the workload of workers is effectively reduced, and the thickness of slag crust is adjusted more timely.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic plan view of the bottom tank of the present invention;

FIG. 3 is a schematic view of the structure of FIG. 2 taken along line A-A;

FIG. 4 is a schematic view of the structure of FIG. 2 along the line B-B;

fig. 5 is an electrical schematic of the present invention.

The reference numerals in the figures denote: 1. a cooling water ring pipe; 21. a bottom water tank; 211. an inner sidewall; 212. a middle partition plate; 213. an outer sidewall; 22. a middle lower water tank; 23. a middle water tank; 24. a top water tank; 31. an environmental water control valve; 32. a return water control valve; 33. a water regulating control valve; 34. a water inlet control valve; 41. a water inlet thermocouple; 42. a water outlet thermocouple; 51. a ring pipe water pump; 61. a water inlet pipeline; 62. a communicating pipe; 63. a water outlet pipeline; 64. a return water branch pipe; 7. a CPU; j1, a first relay; j1-1, a first relay normally open control contact; t1, a first triode; j2, second relay; j2-1, a second relay normally open control contact; t2, a second triode; j3, third relay; j3-1, a third relay normally open control contact; t3, third triode.

Detailed Description

Referring to fig. 1, an embodiment of the present invention is shown. The utility model comprises four layers of water tanks which are sequentially communicated from top to bottom and have the same structure and are arranged on the outer wall of the blast furnace; a top water tank 24, an intermediate water tank 23, an intermediate water tank 22 and a bottom water tank 21, which cool different parts of the blast furnace.

See fig. 2, 3 and 4; the bottom water tank 21 is internally provided with an annular middle partition plate 212 which divides the inner cavity of the bottom water tank into an inner annular chamber and an outer annular chamber; the middle partition plate 212 is provided with a gap for communicating the inner annular chamber with the outer annular chamber; a communicating pipe 62 is arranged between the bottom water tank and the middle and lower water tanks; one end of the water inlet pipeline 61 is communicated with the cooling water ring pipe 1, and the other end is communicated with the external annular chamber; one end of the communicating pipe 62 is communicated with the inner annular chamber, the other end is communicated with the middle and lower layer water tanks 22 through the water regulating control valve 33, and a water return branch pipe communicated with the water cooling annular pipe 1 is arranged on the communicating pipe 62; the water-circulation control valve 31 is arranged on the water return branch pipe 64; the water inlet pipe 61 and the communicating pipe 62 are respectively provided with a water inlet thermocouple 41 and a water outlet thermocouple 42. The cooling water circulates in the cooling water loop 1. A loop water pump 51 is arranged between the cooling water loop 1 and the water inlet end, and the flow can be adjusted to a certain degree through adjustment of the loop water pump 51. The water inlet pipeline 61 and the communicating pipe 62 are vertically arranged and communicated at the same circumferential position of the bottom water tank; the gap positions of the middle partition 212 and the communication positions of the water inlet pipelines 61 in the outer annular chamber are symmetrically distributed on the circumference. Adopt above-mentioned structure, cooling water gets into from the breach entering inside cavity behind the cyclic annular cavity of outside from the water inlet, and inside cavity cools down for the blast furnace again, and the cooling water is for the cooling water balance temperature of inside cavity always after getting into the cyclic annular cavity of outside for the cooling temperature of circumference is roughly the same, and like this, circumferencial direction's cinder strap thickness can keep unanimous, is favorable to strengthening the stability of cinder strap. When the blast furnace slag corresponding to the bottom water tank 21 is excessively thick, the cooling water introduced into the bottom water tank 21 needs to be increased, and in order to reduce the influence on the upper water tank, the excessive water is adjusted to return to the cooling water loop pipe 1 from the return water pipe by adjusting the valve opening degrees of the loop water control valve 31 and the loop water control valve 33.

Referring to fig. 5, the control is performed by taking the mounted components of the bottom water tank 21 as an example. The utility model also includes a control assembly; the control assembly comprises a CPU7, a first relay J1, a first relay normally open control contact J1-1, a first triode T1, a second relay J2, a second relay normally open control contact J2-1 and a second triode T2; the signal output end of the water inlet thermocouple 41 is connected with a P1.0 interface of the CPU 7; the signal output end of the water outlet thermocouple 42 is connected with a port P1.1 of the CPU 7; the P2.0 interface of the CPU7 is connected with the base electrode of a first triode T1; the emitting electrode of the first triode T1 is grounded, and the collector electrode of the first triode T1 is connected with a power supply after passing through a first relay J1; one end of the first relay normally open control contact J1-1 is connected with a power supply, and the other end is grounded after passing through the return water control valve 32; the P2.1 interface of the CPU7 is connected with the base electrode of a second triode T2; the emitter of the second triode T2 is grounded, and the collector of the second triode T2 is connected with a power supply after passing through a second relay J2; one end of the normally open control contact J2-1 of the second relay is connected with a power supply, and the other end of the normally open control contact J2-1 of the second relay is grounded after passing through the water regulating control valve 33; the P2.2 interface of the CPU7 is connected with the base electrode of a third triode T3; the emitter of the third triode T3 is grounded, and the collector of the third triode T3 is connected with a power supply after passing through a third relay J3; one end of a normally open control contact J3-1 of the third relay is connected with a power supply, and the other end of the normally open control contact is grounded after passing through the water inlet control valve 34; the P2.3 interface of the CPU7 is connected with the signal input end of the water inlet control valve 34; the P2.4 interface of the CPU7 is connected with the signal input end of the water control valve 33; the P2.4 interface of the CPU7 is connected to a signal input of the return water control valve 32. With the above-mentioned mechanism, the inlet thermocouple 41 and the outlet thermocouple 42 transmit the detected temperatures to the CPU7, and the CPU7 controls the opening and closing of the return water control valve 32, the water control valve 33, and the inlet water control valve 34 and the valve opening degrees according to the temperature difference; accordingly, the influence on the upper water tank when the lower water tank is adjusted is weakened, and the thickness of the slag crust at the upper position and the lower position is more suitable.

The working process of the utility model is as follows: taking the bottom water tank 21 as an example: the inlet thermocouple 41 and the outlet thermocouple 42 of the bottom water tank 21 transmit the water temperature detection structure to the CPU7, the CPU7 determines according to the temperature, if the temperature difference exceeds a preset value, the temperature of the water in the bottom water tank is too high at this time, the CPU7 needs to control and increase the valve opening of the inlet control valve 34 to increase the water flowing to the bottom water tank 21, and in order to weaken the influence of the water flow of the bottom water tank on the middle and upper water tanks 22, the return control valve 32 is increased, and the water regulation control valve 33 is slightly increased or is not adjusted.

Claims (4)

1. A blast furnace stave structure characterized in that: comprises a plurality of layers of water tanks surrounding the outer wall of the blast furnace; the upper and lower adjacent water tanks are communicated through a communicating pipe (62); the bottom water tank (21) in the water tanks is respectively communicated with the cooling water ring pipe (1) through a water inlet pipeline (61) and the top water tank (24) in the water tanks is respectively communicated with the cooling water ring pipe (1) through a water outlet pipeline (63); each water tank is provided with an annular middle partition plate (212) which divides the inner cavity of the water tank into an inner annular chamber and an outer annular chamber; the middle partition plate (212) is provided with a notch for communicating the inner annular chamber with the outer annular chamber; the external annular chamber is communicated with a water inlet pipeline (61) or a communicating pipe (62); the inner annular chamber is communicated with a communicating pipe (62) or a water outlet pipeline (63); a return water branch pipe communicated with the cooling water ring pipe (1) is arranged on the communicating pipe (62); thermocouples are respectively arranged on the water inlet pipeline (61), the water outlet pipeline (63) and the communicating pipe (62); and control valves are respectively arranged on the water inlet pipeline (61), the communicating pipe (62) and the water return branch pipe (64).

2. The blast furnace stave structure according to claim 1, wherein: the water inlet pipeline (61), the communicating pipe (62) or the water return branch pipe (64) are communicated and arranged up and down at the same circumferential position of the water tank; the gaps of the middle partition plate (212) and the communication positions of the communication pipe (62), the water inlet pipeline (61) or the water outlet pipeline (63) are symmetrically distributed on the circumference.

3. The blast furnace stave structure according to claim 1, wherein: the communicating pipe (62) communicates the upper part of the lower tank with the lower part of the upper tank.

4. The blast furnace stave structure of claim 1, 2 or 3 wherein: the device also comprises a control component; the control assembly comprises a CPU (7); thermocouples on the water inlet pipeline (61), the water outlet pipeline (63) and the communicating pipe (62) are respectively connected with the signal input end of the CPU (7); and the signal output end of the CPU (7) is respectively connected with the control valves on the water inlet pipeline (61), the communicating pipe (62) and the water return branch pipe (64).

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