Waste heat utilization device for slag flushing water of steel-making furnace

Abstract

A slag flushing water waste heat utilization device for a steel-making furnace comprises a settling pond, a slag flushing water outlet pipe is communicated with the settling pond, the settling pond is connected with a first-stage standing pond through a connecting water pipe, the first-stage standing pond is connected with a second-stage standing pond through a connecting water pipe, the second-stage standing pond is connected with a third-stage standing pond through a connecting water pipe, and the third-stage standing pond is connected with a fourth-stage standing pond through a connecting water pipe. A filter screen is arranged at an inlet of the connecting water pipe. Compared with the prior art, the energy recovery device has the technical effects that the heat exchanger is arranged, so that partial energy can be recovered.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of steelmaking, and particularly relates to a slag flushing water waste heat utilization device of a steelmaking furnace. BACKGROUND

[0002] In the working of the steelmaking furnace applied in the production of modern steel enterprises, in order to remove impurities in the metal, many factors must be considered, but the most important factor is slagging and deslagging, and deslagging produces slag flushing water, and the temperature of the slag flushing water is high.

[0003] At present, the heat of the slag flushing water cannot be utilized, and energy is wasted. CONTENT OF THE UTILITY MODEL

[0004] The technical problem to be solved by the utility model is how to design a slag flushing water waste heat utilization device of a steelmaking furnace, which can recover part of energy.

[0005] The technical scheme of the utility model is specifically as follows:

[0006] A slag flushing water waste heat utilization device of a steelmaking furnace, which comprises a sedimentation tank, a slag flushing water outlet pipe is connected to the sedimentation tank, the sedimentation tank is connected to a first static tank through a connecting water pipe, the first static tank is connected to a second static tank through a connecting water pipe, the second static tank is connected to a third static tank through a connecting water pipe, the third static tank is connected to a fourth static tank through a connecting water pipe, and a filter screen is arranged at the inlet of the connecting water pipe.

[0007] A waste heat water pump is arranged on the fourth static tank, the water pump inlet of the waste heat water pump is located at the upper portion of the fourth static tank, the water pump outlet of the waste heat water pump is connected to the hot water inlet of a heat exchanger through a pipeline, and the cold water outlet of the heat exchanger is connected to the sedimentation tank through a pipeline.

[0008] The connecting water pipes are distributed on a horizontal plane as a whole and are S-shaped bends.

[0009] Compared with the prior art, the utility model has the technical effect that the heat exchanger can recover part of energy. DRAWINGS

[0010] Figure 1 is a schematic view of the utility model.

[0011] Figure 2 is a top view of the connecting water pipes. DETAILED DESCRIPTION

[0012] The utility model will be described in detail below in combination with the drawings and the specific embodiments.

[0013] For example, Figure 1The utility model relates to a kind of steel-making furnace slag flushing water waste heat utilization device, including sedimentation tank 10, slag flushing outlet pipe 11 is connected with sedimentation tank 10, sedimentation tank 10 is connected with first-stage standing pool 21 by connecting water pipe 25, first-stage standing pool 21 is connected with second-stage standing pool 22 by connecting water pipe 25, second-stage standing pool 22 is connected with third-stage standing pool 23 by connecting water pipe 25, third-stage standing pool 23 is connected with fourth-stage standing pool 24 by connecting water pipe 25, and filter screen is equipped at the inlet of connecting water pipe 25.

[0014] Fourth-stage standing pool 24 is equipped with waste heat water pump 30, and the water pump inlet 31 of waste heat water pump 30 is located at the upper portion of fourth-stage standing pool 24, and the water pump outlet 32 of waste heat water pump 30 is connected with the hot water inlet of heat exchanger 40 by pipeline, and the cold water outlet of heat exchanger 40 is connected with sedimentation tank 10 by pipeline.

[0015] Although filter screen is equipped at the inlet of connecting water pipe 25, but there are also small particles into standing pool, if more particles enter heat exchanger 40, it can cause heat exchanger 40 waterway blockage, for this, need less particles to enter standing pool.

[0016] For this, connecting water pipe 25 is distributed in a horizontal plane as a whole, and is S-shaped bend.

[0017] Its working principle is:

[0018] A, slag flushing

[0019] Slag flushing inlet pipe extracts clean water from sedimentation tank 10 into steel-making furnace, after slag flushing, slag flushing water enters sedimentation tank 10 from slag flushing outlet pipe 11, and the cycle is completed, which is prior art.

[0020] B, waste heat utilization

[0021] S1, high-temperature water of sedimentation tank 10 enters four standing pools in turn, and high-temperature water is deposited in standing pool, and small particles are deposited in standing pool, and more clear high-temperature water enters waste heat water pump 30.

[0022] S2, high-temperature water of waste heat water pump 30 enters heat exchanger 40 from water pump outlet 32 and hot water inlet, and becomes low-temperature water after heat exchange, and low-temperature water returns to sedimentation tank 10 from the cold water outlet of heat exchanger 40.

[0023] At the same time, domestic water source enters heat exchanger 40 from the cold water inlet 41 of heat exchanger 40, and becomes high-temperature water after heat exchange, and high-temperature water enters living area from the hot water outlet 42 of heat exchanger 40.

[0024] The characteristics of the application are:

[0025] S1, compared with prior art, the technical effect of the utility model is that the utility model is provided with heat exchanger, and part of energy can be recycled.

[0026] S2, after being provided with the technical feature that the connecting water pipe 25 is distributed in one horizontal plane as a whole and is S-shaped, the water speed of the connecting water pipe 25 is slower, so that the high-temperature water is allowed to stand and deposit in the standing pool, and more fine particles are allowed to sink to the bottom of the standing pool, thereby avoiding the water path of the heat exchanger 40 from being blocked.

[0027] Other contents refer to the prior art.

[0028] The above only is the preferred embodiment of the present application, and it should be pointed out that, for those skilled in the art, without departing from the overall concept of the present application, a number of changes and improvements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A device for utilizing waste heat from slag flushing water in a steelmaking furnace, comprising a sedimentation tank (10), a slag flushing water outlet pipe (11) connected to the sedimentation tank (10), and the sedimentation tank (10) connected to a primary settling tank (21) via a connecting water pipe (25), characterized in that: The first-stage settling tank (21) is connected to the second-stage settling tank (22) via a connecting water pipe (25). The second-stage settling tank (22) is connected to the third-stage settling tank (23) via a connecting water pipe (25). The third-stage settling tank (23) is connected to the fourth-stage settling tank (24) via a connecting water pipe (25). A filter screen is provided at the inlet of the connecting water pipe (25). The fourth-stage settling tank (24) is equipped with a waste hot water pump (30). The water inlet (31) of the waste hot water pump (30) is located at the top of the fourth-stage settling tank (24). The water outlet (32) of the waste hot water pump (30) is connected to the hot water inlet of the heat exchanger (40) through a pipe. The cold water outlet of the heat exchanger (40) is connected to the sedimentation tank (10) through a pipe.

2. The waste heat utilization device for slag flushing water in steelmaking furnaces as described in claim 1, characterized in that: The connecting water pipes (25) are distributed in a horizontal plane and are S-shaped bends.

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