Pipeline device for reducing temperature of raw gas of iron-making blast furnace

Abstract

The utility model belongs to the technical field of blast furnace raw gas dust removal equipment, and relates to a pipeline device for reducing the temperature of raw gas of an ironmaking blast furnace, which comprises a gravity dust remover, a gas inlet pipe is arranged at the top of the gravity dust remover, and a raw gas pipeline is led out from one side of the gravity dust remover. A thermometer A and a thermometer B are arranged on one side of the front end and one side of the rear end of the raw gas pipeline respectively, a connecting pipeline is led out of the tail end of the raw gas pipeline and connected to the dry dedusting box, a connecting valve is arranged on the connecting pipeline, a gas outlet pipeline is arranged on the dry dedusting box, and a turbulent flow cooler is arranged on the raw gas pipeline in a surrounding mode. The turbulent flow cooler is connected to a raw gas pipeline through a gas supply pipe and is connected with a nitrogen inlet pipe, and a control valve and a check valve are arranged on the nitrogen inlet pipe. Nitrogen enters the annular turbulent flow cooler and then enters the raw gas pipeline to be mixed with gas for cooling, normal production can be guaranteed without closing the dry dust removal box after the temperature is reduced, and the service life of a cloth bag in the dry dust removal box is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to blast furnace raw coal gas dust removal equipment technical field, concretely relates to a kind of pipeline device for reducing iron blast furnace raw coal gas temperature. BACKGROUND

[0002] When the temperature of raw coal gas of iron blast furnace exceeds 250 DEG C, dry dust removal needs personnel to manually close and stop multiple boxes, to prolong the service life of superfine fluorine mica cloth bag in box, high-temperature raw coal gas passes through the box not closed, it is easy to cause cloth bag damage, when temperature reduces, manually put into the box that has been closed again, repeatedly as above to ensure the normal operation of production and equipment.

[0003] When the temperature of blast furnace top of iron blast furnace is too high, the temperature of raw coal gas is too high, and after water is sprayed on the blast furnace top, the temperature is still high, and when the temperature exceeds 250 DEG C, dry dust removal needs to close multiple boxes to prolong the service life of superfine fluorine mica cloth bag in the box, high-temperature raw coal gas passes through the box not closed, it is easy to cause cloth bag damage, resulting in high production cost, once damaged, dust removal and filtration cannot be carried out, the box must be stopped, and the cloth bag is replaced by personnel, the temperature of work place is high, the dust environment is extremely poor, and the labor intensity is too large. Therefore, a pipeline device for reducing the temperature of raw coal gas of iron blast furnace is provided. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of pipeline device for reducing the temperature of raw coal gas of iron blast furnace, with the function of reducing the temperature of raw coal gas of iron blast furnace, solve the problem that the temperature of raw coal gas is too high when the temperature of blast furnace top of iron blast furnace is too high in prior art.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme that the utility model provides a kind of pipeline device for reducing the temperature of raw coal gas of iron blast furnace, including gravity dust collector, the gravity dust collector side leads out raw coal gas pipeline, raw coal gas pipeline end leads out and is connected to dry dust removal box with connecting pipeline, raw coal gas pipeline is provided with spoiler cooler around, spoiler cooler is connected to raw coal gas pipeline with gas pipe, and spoiler cooler is connected with nitrogen inlet pipe.

[0006] Preferably, the gravity dust collector is provided with gas inlet pipe at the top.

[0007] Preferably, the front end side and rear end side of the raw coal gas pipeline are respectively provided with temperature table A and temperature table B.

[0008] Preferably, the connecting pipeline is provided with connecting valve.

[0009] Preferably, the dry dust removal box is provided with gas outlet pipe.

[0010] Preferably, the dry dust removal box is provided with fluorine mica cloth bag.

[0011] Preferably, the spoiler cooler is an annular pipe.

[0012] Preferably, the nitrogen inlet pipe is provided with a control valve and a check valve.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are that,

[0014] 1. The utility model discloses a nitrogen gas enters the annular spoiler cooler and then enters the raw gas pipeline and mixes into the gas to reduce the temperature, and after reducing the temperature, normal production can be ensured without closing the dry dedusting box, and the service life of the cloth bag in the dry dedusting box is prolonged.

[0015] 2. The utility model discloses a raw gas temperature reducing device for a blast furnace, which solves the problem of excessively high raw gas temperature caused by excessively high blast furnace top temperature in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can also be obtained according to these drawings without the creative labor.

[0017] Figure 1 It is a kind of raw gas temperature reducing device for blast furnace pipeline device structure schematic diagram;

[0018] In the above figure, 1, gravity dust collector, 2, inlet pipe, 3, raw gas pipeline, 4, temperature table A, 5, temperature table B, 6, connecting pipeline, 7, dry dedusting box, 8, connecting valve, 9, outlet pipeline, 10, spoiler cooler, 11, gas supply pipe, 12, nitrogen inlet pipe, 13, control valve, 14, check valve. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can also be obtained according to these drawings without the creative labor.

[0020] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, however, the utility model can also be implemented in other ways different from the description herein, therefore, the utility model is not limited to the specific embodiments disclosed in the following description.

[0021] Embodiment 1, as Figure 1As shown, a pipeline device for reducing the temperature of raw gas of an iron-making blast furnace, comprising a gravity dust collector 1, which separates solid particles from the gas flow by gravity, reduces the dust load entering the subsequent equipment, and can effectively improve the subsequent dust removal efficiency. One side of the gravity dust collector 1 is provided with a raw gas pipeline 3, which conducts the raw gas generated from the iron-making blast furnace, can withstand high temperature and high pressure conditions, and provides a path for subsequent cooling and treatment.

[0022] The raw gas pipeline 3 is provided at the end with a connecting pipeline 6 connected to a dry dust removal tank 7, which uses a membrane bag to filter fine dust in the gas, effectively removes particles in the gas, ensures that the discharged gas meets environmental protection requirements, and prolongs the service life of the bag. The connecting pipeline 6 connects the raw gas pipeline 3 to the dry dust removal tank 7, ensuring smooth gas flow.

[0023] A turbulence cooler 10 is arranged around the raw gas pipeline 3, which increases the contact area between the gas flow and the cooling gas by turbulence during the gas flow, realizes temperature reduction, has a high heat dissipation function, helps to quickly reduce the gas temperature, and avoids damage to the dry dust removal tank 7 caused by high temperature. The turbulence cooler 10 is connected to the raw gas pipeline 3 through a gas supply pipe 11, which sends cooling gas into the turbulence cooler 10 to achieve good gas delivery. The turbulence cooler 10 is connected with a nitrogen inlet pipe 12, which introduces nitrogen for the turbulence cooler 10 to cool down. Nitrogen has good cooling effect and does not participate in chemical reaction, with high safety.

[0024] Now the specific design of the above key components will be described in detail:

[0025] The gravity dust collector 1 is provided at the top with an air inlet pipe 2, the pipe diameter of which is accurately calculated according to actual needs to ensure sufficient gas flow and dust removal effect. The connection of the air inlet pipe 2 considers fluid dynamics,

[0026] The air inlet angle is optimized to reduce vortex loss and optimize the stress condition of the dust collector to prolong the service life.

[0027] The raw gas pipeline 3 is provided at the front end and the rear end with a temperature table A4 and a temperature table B5 respectively. The temperature table A4 and the temperature table B5 are made of high-temperature corrosion-resistant materials and are designed to avoid the influence of external environment on performance. The temperature table A4 and the temperature table B5 are installed at a position convenient for observation. The temperature table A4 is used to monitor the temperature of the gas entering the dust collector, and the temperature table B5 is used to monitor the temperature of the gas before entering the dry dust removal tank 7. The temperature table A4 and the temperature table B5 are provided with data connection interfaces, which are convenient for subsequent installation of a monitoring system to realize real-time transmission and recording of temperature data.

[0028] The connecting pipeline 6 is provided with a connecting valve 8. The connecting valve 8 is a ball valve or a gate valve, which is selected according to the required fluid control accuracy, and the valve material has high temperature resistance and corrosion resistance, and can be quickly opened and closed, and a manual operation handle is reserved for emergency.

[0029] The dry dedusting box 7 is provided with an air outlet pipeline 9. The air outlet pipeline 9 is designed as a pipeline with a suitable diameter, which is suitable for the flow of gas after dedusting, and reduces the flow resistance. The air outlet pipeline 9 is connected at a position that does not affect the gas flow during the dedusting process, at the top or side of the dedusting box. When the air outlet pipeline 9 is connected with the dry dedusting box 7, a sealing design is adopted to avoid air leakage.

[0030] The dry dedusting box 7 is provided with a fluorine mesh cloth bag. The cloth bag made of fluorine mesh material has excellent high temperature resistance, corrosion resistance and filtering effect, and can effectively capture ultrafine dust. The design of the fluorine mesh cloth bag should consider the filtering area, and a multi-bag design is adopted to increase the total filtering area, so as to improve the dedusting efficiency. The fluorine mesh cloth bag is fixed in a hanging way, which can be fully expanded and in good contact with the airflow, reducing airflow short circuit and blind area. The installation should be convenient for disassembly and replacement, so as to facilitate regular maintenance and cleaning. The clamp used is high temperature resistant and corrosion resistant.

[0031] The turbulence cooler 10 is an annular pipe, which helps to uniformly distribute the airflow, increases the contact area between the gas and the cooling air, and thus improves the cooling efficiency.

[0032] The nitrogen inlet pipe 12 is provided with a control valve 13 and a check valve 14. The control valve 13 is selected according to the control accuracy of the nitrogen demand, and an electric or pneumatic valve is commonly used. The check valve 14 ensures that the nitrogen does not backflow. The control valve 13 is provided to facilitate the adjustment of the flow of nitrogen according to the real-time environmental conditions, so as to ensure the cooling effect. The check valve 14 is protected from backflow gas.

[0033] The temperature table A4 and the control valve 13 are connected to the PLC to make a interlocking program: when the temperature is greater than the set temperature, the valve is opened, and the opening size of the control valve 13 is set according to the flow. The temperature table B5 observes the cooling effect, and the flow of nitrogen entering can be adjusted according to the temperature after cooling. When the temperature of the raw gas flowing through the temperature table A4 is greater than 250℃, the control valve 13 automatically opens, and the nitrogen entering the turbulence cooler 10 after cooling enters the raw gas pipeline 3 to cool the gas. The opening size of the control valve 13 is set according to the flow.

[0034] The installation position of the turbulence cooler 10 prevents corrosion of the welding points around the coal gas, and wear-resistant materials can be applied for protection. The annular turbulence cooler 10 must be larger than the diameter of the raw gas pipeline 3 for production. The gas supply pipe 11 can be made of 6, 8 or 10 pipes distributed around the center circle of the turbulence cooler 10. The number of gas supply pipes 11 is designed according to the actual situation.

[0035] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, the circuit connection adopts the conventional connection mode in the prior art, and the details are not described herein, and the contents not described in detail in the description belong to the prior art known by the professional technical personnel.

[0036] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms, and any skilled person in the art can change or modify the equivalent embodiments applied to other fields by using the disclosed technical content, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the technical scheme content of the utility model still belongs to the protection scope of the technical scheme of the utility model.

Claims

1. A pipeline device for reducing the temperature of blast furnace raw gas, characterized in that, Including gravity dust collector, one side of gravity dust collector leads out with raw gas pipeline, the end of raw gas pipeline leads out with connecting pipeline and connects to dry dust removal box, the raw gas pipeline is provided with spoiler cooler around, the spoiler cooler is connected to the raw gas pipeline through gas pipe, and the spoiler cooler is connected with nitrogen inlet pipe.

2. A device for reducing the temperature of raw gas from a blast furnace according to claim 1, characterized in that, The top of the gravity dust collector is provided with an air inlet pipe.

3. A device for reducing the temperature of raw gas in a blast furnace according to claim 1, characterized in that, The front end and the rear end of the raw gas pipeline are respectively provided with temperature table A and temperature table B.

4. A device for reducing the temperature of raw gas in a blast furnace according to claim 1, characterized in that, The connecting pipeline is provided with a connecting valve.

5. A device for reducing the temperature of raw gas in a blast furnace according to claim 1, characterized in that, The dry dust removal box is provided with an air outlet pipeline.

6. A device for reducing the temperature of raw gas in a blast furnace according to claim 1, characterized in that, The dry dust removal box is provided with fluorine mei s cloth bag.

7. A device for reducing the temperature of raw gas in a blast furnace according to claim 1, characterized in that, The spoiler cooler is an annular pipe.

8. A device for reducing the temperature of raw gas in a blast furnace according to claim 1, characterized in that, The nitrogen inlet pipe is provided with a control valve and a check valve.

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