Auxiliary device for cooling flue gas of bottom blowing furnace

Abstract

The utility model belongs to the technical field of lead metal smelting industry, and particularly relates to an auxiliary device for cooling flue gas of a bottom blowing furnace. The auxiliary device comprises a connecting pipeline, a circulating assembly, a water pool, a driving part and a cooling device, wherein the connecting pipeline is communicated between a smoke outlet of the bottom blowing furnace and a smoke exhaust pipeline; the circulating assembly comprises a circulating pipe, the circulating pipe is spirally attached to the outer side of the connecting pipeline, and water circularly flows in the circulating pipe; the water tank is used for supplying cold water into the circulating assembly and is communicated with the water inlet of the circulating assembly; the driving part is used for driving cold water in the water tank to enter the circulating pipe and communicates with the circulating assembly and the water tank; the cooling device is used for cooling hot water flowing out of the circulating pipe, a water inlet of the cooling device is communicated with the circulating assembly, and a water outlet of the cooling device is communicated with a water inlet of the water pool. According to the auxiliary device, the flue gas of the bottom blowing furnace can be effectively cooled by utilizing circulating water, and the auxiliary device is simple and ingenious in structure and convenient to maintain and repair.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead metal smelting industry, and in particular relates to an auxiliary device for cooling the flue gas of a bottom-blowing furnace. Background Art

[0002] In the lead metallurgical industry, bottom-blown furnaces, as a crucial smelting equipment, generate large amounts of high-temperature flue gas during operation. This high-temperature flue gas not only carries a large amount of heat energy but may also contain harmful substances. Therefore, cooling the flue gas from bottom-blown furnaces is not only necessary for energy conservation and emission reduction, but also a key measure for environmental protection and safe production.

[0003] Traditional bottom-blown furnace flue gas cooling methods mostly use direct cooling, which involves directing the flue gas into a cooling device for cooling. However, this method has many drawbacks, including low cooling efficiency, high energy consumption, and large equipment investment.

[0004] To overcome the shortcomings of existing technologies, an auxiliary device for cooling flue gas from bottom-blown furnaces has been designed. This device utilizes circulating water cooling to achieve efficient, safe, and environmentally friendly cooling of flue gas from bottom-blown furnaces. Furthermore, the device boasts a simple structure and easy maintenance. Summary of the Invention

[0005] The purpose of the utility model is to solve the problems of low cooling efficiency and difficult maintenance of the bottom-blown furnace flue gas cooling device in the prior art, and proposes an auxiliary device for cooling the flue gas of the bottom-blown furnace. The auxiliary device can not only use circulating water to effectively cool the flue gas of the bottom-blown furnace, but also the structure of the auxiliary device is simple and ingenious, and is easy to maintain and repair.

[0006] In order to achieve the above purpose, the technical solutions adopted are:

[0007] An auxiliary device for cooling flue gas from a bottom-blown furnace, comprising:

[0008] a connecting pipe, which is sealed and connected to the smoke outlet of the bottom-blown furnace and the bottom of the smoke exhaust pipe;

[0009] A circulation assembly, comprising a circulation pipe, the circulation pipe being spirally attached to the outer wall of the connecting pipe in a vertical direction, and water circulating in the circulation pipe;

[0010] A water tank, which is used to supply cold water to the circulation component, and the water outlet of the water tank is connected to the water inlet of the circulation component;

[0011] a driving member, used for driving the cold water in the pool into the circulation pipe, the driving member being in communication with both the circulation assembly and the pool;

[0012] and a cooling device for cooling the hot water flowing out of the circulation pipe, wherein the water inlet of the cooling device is connected to the water outlet of the circulation component, and the water outlet of the cooling device is connected to the water inlet of the pool.

[0013] According to the auxiliary device for cooling the flue gas in a bottom-blown furnace of the present invention, further, the connecting pipe is in a square cylindrical shape, and the four circulation pipes are respectively arranged on the outer side walls of the square cylindrical connecting pipe.

[0014] According to the auxiliary device for cooling the flue gas of the bottom-blown furnace of the utility model, the circulation component further includes a diversion pipe and a collecting pipe arranged on the upper part of the connecting pipe, and the water inlet of each circulation pipe is connected to the water outlet of the diversion pipe, and the water outlet of each circulation pipe is connected to the water inlet of the collecting pipe.

[0015] According to the auxiliary device for cooling the flue gas from a bottom-blown furnace of the present invention, further, the water inlet of the diverter pipe is connected to the water outlet of the water pool through a water inlet pipe, and a regulating valve and a flow meter are installed on the water inlet pipe.

[0016] According to the auxiliary device for cooling the flue gas of a bottom-blown furnace of the present invention, further, the water outlet of the collecting pipe is connected to the water inlet of the cooling device through a water outlet pipe, and a thermocouple and a pressure gauge are installed on the water outlet pipe.

[0017] According to the auxiliary device for cooling the flue gas in a bottom-blown furnace of the present invention, further, the driving member is a booster pump, and the booster pump is installed on the water inlet pipe.

[0018] According to the auxiliary device for cooling the flue gas of a bottom-blown furnace of the present invention, further, a refractory layer is built on the outer side of the top of the connecting pipe, and a plurality of support plates are fixed to the outer side of the refractory layer.

[0019] According to the auxiliary device for cooling the flue gas in a bottom-blown furnace of the present invention, further, a flexible layer is fixedly connected to the bottom of the side wall of the exhaust pipe, and the flexible layer is sealed to the refractory layer.

[0020] According to the auxiliary device for cooling the flue gas of a bottom-blown furnace of the present invention, further, the material used for the refractory layer is refractory bricks, and the material used for the flexible layer is rock wool.

[0021] The beneficial effects achieved by adopting the above technical solution are:

[0022] The utility model uses circulating water to cool the flue gas through the cooperation of the water pool, the circulation component and the cooling device, which not only ensures that the circulating water can be cooled continuously and effectively, but also reduces the waste of water resources.

[0023] This utility model has a compact structure and is easy to maintain. The circulation pipes are arranged at intervals outside the connecting pipes, which is compact and takes up little space. In addition, the circulation assembly also includes a diverter pipe and a header pipe, which makes the inflow and outflow of circulating water more orderly and facilitates maintenance and repair of the equipment.

[0024] The fire-resistant layer built on the outside of the top of the connecting pipe of the utility model and the flexible layer fixed on the outside of the bottom of the smoke exhaust pipe not only improve the high-temperature resistance of the equipment, but also ensure the sealing between the connecting pipe and the smoke exhaust pipe, avoid the risk of smoke leakage, and improve the safety and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings of the embodiments of the present invention. The drawings are only used to illustrate some embodiments of the present invention, and are not intended to limit all embodiments of the present invention to these drawings.

[0026] Figure 1 This is a schematic structural diagram of an auxiliary device for cooling flue gas in a bottom-blown furnace according to the present invention;

[0027] Figure 2 yes Figure 1 A partial enlarged view of middle A;

[0028] Figure 3 yes Figure 1 A partial enlarged view of B in the middle;

[0029] Figure 4 yes Figure 1 A partial enlarged view of C in the middle.

[0030] The meanings of the numbers in the figure are:

[0031] 1. Bottom blowing furnace;

[0032] 2. Smoke exhaust duct, 201. Flexible layer;

[0033] 3. Connecting pipes, 301. Circulation assembly, 302. Water tank, 303. Cooling device, 304. Water inlet pipe, 305. Water outlet pipe, 3051. Pressure gauge, 3052. Thermocouple, 306. Booster pump, 307. Control valve, 308. Flow meter, 309. Refractory layer, 310. Support plate, 3011. Diverter pipe, 3012. Collector. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings of specific embodiments of the present invention to clearly and completely describe the exemplary embodiments of the present invention. Unless otherwise defined, technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field.

[0035] like Figure 1-Figure 3 As shown, the auxiliary device for cooling the flue gas of the bottom-blown furnace in this embodiment includes a connecting pipe 3, a circulation component 301, a water pool 302, a driving member 306 and a cooling device 303. The connecting pipe 3 is sealed and connected to the smoke outlet of the bottom-blown furnace 1 and the bottom of the smoke exhaust pipe 2; the circulation component 301 includes a circulation pipe 3013, which is arranged in a vertical spiral and fixed on the outer wall of the connecting pipe 3 by a snap buckle, and water circulates in the circulation pipe 3013; the water tank 302 is used to provide cold water to the circulation component 301, and the water outlet of the water tank 302 is connected to the water inlet of the circulation component 301 through a pipe; the driving member 306 is used to drive the cold water in the water tank 302 into the circulation pipe 3013, and the driving member 306 is connected to the circulation component 301 and the water tank 302 respectively through pipes; the cooling device 303 is used to cool the hot water flowing out of the circulation pipe 3013, and the water inlet of the cooling device 303 is connected to the water outlet of the circulation component 301 through a pipe, and the water outlet of the cooling device 303 is connected to the water inlet of the water tank 302 through a pipe. In the present invention, water circulates throughout the auxiliary device, effectively cooling the flue gas discharged from the flue gas outlet of the bottom-blown furnace 1. Simultaneously, the present invention can realize the recycling of water, thereby reducing production costs.

[0036] Furthermore, the water in the water tank 302 is soft water. Soft water contains fewer calcium and magnesium ions, which reduces the generation of scale (during the heat exchange process) and avoids clogging of the circulation pipe 3013.

[0037] like Figure 1 As shown, the connecting pipe 3 is in the shape of a square cylinder, and the four circulation pipes 3013 are fixed on the outer side walls of the square cylinder-shaped connecting pipe 3013 in the vertical direction by buckles.

[0038] Further, an inspection window is provided on the outer sidewall of the square tube type connecting pipe 3013. Generally, the inspection window is in a sealed closed state. In addition, the circulation pipe 3013 is not arranged at the position of the inspection window.

[0039] like Figure 1 and Figure 2 As shown, the circulation component 301 also includes a diversion pipe 3011 and a collecting pipe 3012 fixed to the upper part of the connecting pipe 3 by a snap, and the water inlet of each circulation pipe 3013 is connected to the water outlet of the diversion pipe 3011, and the water outlet of each circulation pipe 3013 is connected to the water inlet of the collecting pipe 3013.

[0040] like Figure 1 and Figure 3As shown, the water inlet of the diversion pipe 3011 is connected to the water outlet of the water pool 302 through the water inlet pipe 305, and a regulating valve 307 and a flow meter 308 are installed on the water inlet pipe 305. The regulating valve 307 and the flow meter 308 are used together to control the flow of the circulation pipe 3013 entering the circulation component 301 from the water pool 302.

[0041] Furthermore, in actual production, the flow rate of the circulation pipe 3013 entering the circulation component 301 from the water pool 302 can be adjusted through the regulating valve 307 and the flow meter 308 according to the specific conditions of the flue gas discharged from the bottom blowing furnace 1 (discharge volume and temperature).

[0042] like Figure 2 and Figure 4 As shown, the water outlet of the manifold 3012 is connected to the water inlet of the cooling device 303 through the water outlet pipe 305. A thermocouple 3052 and a pressure gauge 3051 are installed on the water outlet pipe 305. The thermocouple is used to detect the temperature of the water flowing in the water outlet pipe 305, and the pressure gauge 3051 is used to detect the pressure of the water flowing in the water outlet pipe 305, thereby better determining the cooling status of the flue gas.

[0043] Furthermore, the cooling device 303 is a cooling machine. The cooling machine is used to cool the hot water flowing out of the circulation pipe 3013 of the circulation component 301 and re-inject the cooled water into the water pool 302, thereby realizing the recycling of water in the utility model.

[0044] like Figure 1 and Figure 4 As shown, the driving member 306 is a booster pump, and the booster pump is installed at a position of the water inlet pipe 304 close to the water pool 302.

[0045] like Figure 1 and Figure 2 As shown, a refractory layer 309 is also built on the top outer wall of the connecting pipe 3, and a plurality of support plates 310 are bonded and fixed to the outer side of the refractory layer. The support plates 310 strengthen and fix the refractory layer 309 to prevent the refractory bricks from falling off.

[0046] It should be understood that the refractory bricks have high hardness and strength and good stability, which can prevent the negative pressure (generated by the exhaust gas in the connecting pipe 3 and the exhaust pipe 2) from sucking away the refractory bricks, thereby ensuring the structural stability of the connecting pipe 3 and the exhaust pipe 2.

[0047] like Figure 1 and Figure 2 As shown, a flexible layer 201 is bonded and fixed to the outer side of the bottom of the smoke exhaust duct 2 , and the flexible layer 201 is bonded and sealed to the fire-resistant layer 309 .

[0048] Furthermore, the material used for the refractory layer 309 is refractory bricks, and the material used for the flexible layer 201 is rock wool.

[0049] It should be understood that during actual production, when the bottom-blown furnace 1 requires periodic maintenance and overhaul, the need to cool the bottom-blown furnace 1 can cause thermal expansion and contraction in the exhaust duct 2 and the connecting duct 3, leading to gaps in their assembly connection. In the present invention, flexible rock wool (flexible layer 201) is used to connect the exhaust duct 2 and the connecting duct 3. This prevents gaps in their assembly connection due to thermal expansion and contraction, thereby preventing smoke from escaping during maintenance and overhaul.

[0050] Here’s how it works:

[0051] S1. Flue gas enters the connecting pipe 3 from the smoke outlet of the bottom-blown furnace 1. Turn on the booster pump 306 to pump cold water from the pool 302 through the water inlet pipe 304 into each circulation pipe 3013 of the circulation assembly 301;

[0052] S2. The flue gas connecting pipe 3 and the cold water in the circulation pipe 3013 continue to exchange heat, the temperature of the flue gas gradually decreases, and the temperature of the cold water in the circulation pipe 3013 gradually increases to become hot water;

[0053] S3. The hot water in the circulation pipe 3013 enters the cooling machine through the outlet pipe 305 and is cooled again into cold water. The cold water re-enters the water tank 302 through the pipe for subsequent circulation.

[0054] The flue gas cooled by the connecting pipe 3 and the circulation component 301 enters the smoke exhaust pipe 2 for subsequent treatment.

[0055] In step S1 , the data of the flow meter 308 on the water inlet pipe 304 is observed to control the opening of the regulating valve 307 , thereby adjusting the flow of water entering the circulation pipe 3013 from the water tank 302 .

[0056] In step S2, the opening of the regulating valve 307 can be controlled according to the temperature of the hot water measured by the thermocouple 3052 on the water outlet pipe 305 and the pressure of the hot water measured by the pressure gauge 3051, thereby enhancing the cooling effect of the flue gas and improving production efficiency.

[0057] It should be noted that when one element is expressed as “connected”, “coupled” or “connected” to another element, it may mean that they are directly connected, coupled or connected, but it should be understood that there may be intermediate elements between the two; that is, the positional relationship of direct connection and indirect connection is covered.

[0058] It should be noted that the use of "a" or "an" and similar words does not necessarily indicate a limitation of quantity. "Include" or "comprising" and similar words mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects.

[0059] It should be noted that terms such as "up", "down", "left" and "right" that indicate orientation or positional relationships are only used to indicate relative positional relationships. This is for the convenience of describing the present invention, and does not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0060] While preferred embodiments for implementing the present invention have been described in detail above, it should be understood that these embodiments are provided for illustrative purposes only and are not intended to limit the scope, applicability, or configuration of the present invention in any way. The scope of protection of the present invention is defined by the appended claims and their equivalents. Persons skilled in the art may make numerous modifications to the aforementioned embodiments based on the teachings of this invention, and such modifications are intended to fall within the scope of protection of the present invention.

Claims

1. An auxiliary device for cooling flue gas from a bottom-blown furnace, characterized in that: include: a connecting pipe, which is sealed and connected to the smoke outlet of the bottom-blown furnace and the bottom of the smoke exhaust pipe; A circulation assembly, comprising a circulation pipe, the circulation pipe being spirally attached to the outer wall of the connecting pipe in a vertical direction, and water circulating in the circulation pipe; A water tank, which is used to supply cold water to the circulation component, and the water outlet of the water tank is connected to the water inlet of the circulation component; A driving member, used for driving the cold water in the pool into the circulation pipe, the driving member being in communication with both the circulation assembly and the pool; and a cooling device for cooling the hot water flowing out of the circulation pipe, wherein the water inlet of the cooling device is connected to the water outlet of the circulation component, and the water outlet of the cooling device is connected to the water inlet of the pool.

2. The auxiliary device for cooling flue gas from a bottom-blown furnace according to claim 1, characterized in that: The connecting pipe is in a square cylindrical shape, and the four circulation pipes are respectively arranged on the outer side walls of the square cylindrical connecting pipe.

3. The auxiliary device for cooling the flue gas of a bottom-blown furnace according to claim 2, characterized in that: The circulation component also includes a diversion pipe and a collecting pipe arranged on the upper part of the connecting pipe. The water inlet of each circulation pipe is connected to the water outlet of the diversion pipe, and the water outlet of each circulation pipe is connected to the water inlet of the collecting pipe.

4. The auxiliary device for cooling flue gas from a bottom-blown furnace according to claim 3, characterized in that: The water inlet of the diverter pipe is communicated with the water outlet of the pool through a water inlet pipe, and a regulating valve and a flow meter are installed on the water inlet pipe.

5. The auxiliary device for cooling flue gas from a bottom-blown furnace according to claim 3, characterized in that: The water outlet of the collecting pipe is communicated with the water inlet of the cooling device through a water outlet pipe, and a thermocouple and a pressure gauge are installed on the water outlet pipe.

6. The auxiliary device for cooling flue gas from a bottom-blown furnace according to claim 4, characterized in that: The driving component is a booster pump, and the booster pump is installed on the water inlet pipe.

7. The auxiliary device for cooling flue gas from a bottom-blown furnace according to claim 1 or 2, characterized in that: A fire-resistant layer is also built on the outer side of the top of the connecting pipe, and a plurality of support plates are fixedly connected to the outer side of the fire-resistant layer.

8. The auxiliary device for cooling flue gas from a bottom-blown furnace according to claim 7, characterized in that: A flexible layer is further fixed to the bottom of the side wall of the smoke exhaust duct, and the flexible layer is sealed to the fire-resistant layer.

9. The auxiliary device for cooling flue gas from a bottom-blown furnace according to claim 8, characterized in that: The material used for the refractory layer is refractory bricks, and the material used for the flexible layer is rock wool.

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