Blast furnace gas flue desulfurization liquid agent spraying device

Abstract

The utility model discloses a desulfurizing liquid agent spraying device for a blast furnace gas flue, which is used for detoxification of gas in the flue and comprises a liquid agent storage tank, a gas discharge flue of a blast furnace and a bag-type dust collector, and a dust collector connecting port connected with the bag-type dust collector is arranged on the lower end side of a vertical section of the gas discharge flue. The dust remover connecting interface is connected with a bag-type dust remover, a liquid medicament input interface is arranged at the position, 8-10 meters away from the dust remover connecting interface, of the vertical section of the coal gas discharge flue above the dust remover connecting interface, and an output pipeline of the liquid medicament storage tank is connected with the liquid medicament input interface through a metering pump. The liquid medicament input interface is connected with a liquid medicament input pipe, the liquid medicament input pipe is inserted into the gas discharge flue and is welded and fixed with the side wall of the gas discharge flue, and an atomizing nozzle is arranged on the liquid medicament input pipe inserted into the gas discharge flue. The device is quick and convenient to connect and mount, and the optimal detoxification effect is achieved by adopting the atomizing nozzle.

Description

Technical Field

[0001] This utility model relates to a liquid agent spraying device for desulfurization of blast furnace gas flue, used for detoxification of gas in the flue. Background Technology

[0002] Different manufacturers use different blast furnace feedstocks and have varying ratios of dry and wet coke, resulting in a complex and variable composition of trace impurities in the blast furnace gas. In practice, the actual levels of chlorides, sulfates, sulfites, thiocyanates, and nitrates are relatively high. Analysis of water samples taken after TRT typically reveals high levels of chlorine and sulfates, causing the pH to range from 2 to 5, with the most severe cases reaching around 1 to 2. The high presence of chlorine and its related salts can rapidly degrade the activity of the accompanying dry desulfurization agents, even leading to irreversible poisoning. This results in persistently high operating costs for dry desulfurization, directly impacting the competitiveness of this environmental technology in the field of blast furnace gas desulfurization.

[0003] Currently, the proposed solution to this nationwide problem is to use wet desulfurization agents for detoxification. However, determining the installation location for the wet desulfurization agents and selecting the appropriate spraying method to achieve the best technical results are issues that need to be addressed. Summary of the Invention

[0004] The purpose of this invention is to provide a liquid agent spraying device for desulfurizing blast furnace gas flue gas, which is used to detoxify the gas in the flue gas. By setting the nozzle at a limited distance from the main gas inlet pipe before the bag filter after gravity dust removal and using an atomizing nozzle, the agent can react efficiently with chlorine-containing substances and related acidic salts in the gas to achieve the best detoxification effect.

[0005] To achieve the above objectives, the solution of this utility model is as follows:

[0006] A liquid chemical spraying device for desulfurizing blast furnace gas flue gas is disclosed for detoxifying the gas in the flue gas. The device includes a liquid chemical storage tank, a blast furnace gas exhaust duct, and a bag filter. A dust collector connection interface is provided at the lower end of the vertical section of the gas exhaust duct, connecting to the bag filter. A liquid chemical input interface is located 8 to 10 meters above the dust collector connection interface on the vertical section of the gas exhaust duct. The output pipeline of the liquid chemical storage tank is connected to the liquid chemical input interface via a metering pump. The liquid chemical input interface is connected to a liquid chemical input pipe, which is inserted into the gas exhaust duct and welded to the side wall of the gas exhaust duct. An atomizing nozzle is provided on the liquid chemical input pipe inserted into the gas exhaust duct.

[0007] A further aspect of the solution is that the liquid agent input pipe inserted into the gas exhaust duct passes through the center of the gas exhaust duct, runs from one end of the side wall of the gas exhaust duct to the other end of the side wall, and is perpendicular to the gas exhaust duct. There are multiple atomizing nozzles, which are evenly distributed on the two horizontally opposite sides of the liquid agent input pipe.

[0008] A further aspect of the solution is that the atomizing nozzle is an atomizing nozzle in which the atomized liquid particle size is between 500 and 100 μm.

[0009] A further improvement in the solution is that the liquid medicine input interface adopts a quick-plug connector interface.

[0010] A further aspect of the solution is that the liquid medicine storage tank is equipped with a disturbance pump, the inlet of which is connected to the lower end of the liquid medicine storage tank, and the outlet of which is connected to the upper end of the liquid medicine storage tank.

[0011] The beneficial effects of this utility model are: the structure is quick and easy to connect and install. By setting the nozzle at a limited distance from the main gas inlet pipe before the bag filter after gravity dust removal and using an atomizing nozzle, the agent can react efficiently with chlorine-containing substances and related acidic salts in the gas to achieve the best detoxification effect.

[0012] The utility model will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the liquid reagent inlet pipe inside the gas exhaust duct. Figure 1 AA section view. Detailed Implementation

[0015] A liquid agent spraying device for desulfurization in blast furnace gas flue is used for detoxifying the gas in the flue, such as... Figure 1 and Figure 2As shown, the device includes a liquid reagent storage tank 1, a blast furnace gas exhaust duct 2, and a bag filter 3. The blast furnace 4's flue gas output is connected to the inlet of the blast furnace 4's gas exhaust duct 2, and the outlet of the gas exhaust duct 2 is connected to the bag filter 3. The gas exhaust duct 2 before the bag filter 3 is configured as a vertical section 201. A dust collector connection interface 202 for connecting to the bag filter 3 is provided at the lower end of the vertical section 201 of the gas exhaust duct. The dust collector connection interface 202 is connected to the bag filter 3. A liquid agent input interface 203 is installed on the vertical section of the gas flue above the interface 202, at a distance of 8 to 10 meters from the dust collector connection interface. The output pipeline of the liquid agent storage tank 1 is connected to the liquid agent input interface 203 via the metering pump 5. The liquid agent input interface 203 is connected to the liquid agent input pipe 205 via the flange 204. The liquid agent input pipe 205 is inserted into the gas flue 2 and welded to the side wall of the gas flue. An atomizing nozzle 6 is installed on the liquid agent input pipe 205 inserted into the gas flue.

[0016] A liquid agent inlet pipe 205 inserted into the gas exhaust duct 2 can be equipped with an atomizing nozzle 6 at its inlet end. To uniformly and quickly fill the gas exhaust duct 2 with the injected liquid agent, a preferred solution is to surround the inner wall of the gas exhaust duct 2 with the inserted liquid agent inlet pipe 205, and then evenly distribute at least four atomizing nozzles 6 to spray the agent towards the center. However, for existing equipment, this requires cutting and processing the gas exhaust duct, which is relatively complex. In this embodiment, to achieve the same rapid filling of the gas exhaust duct 2 with the liquid agent, and with a simple structure that is easy to implement in existing equipment, another preferred solution was chosen: such as... Figure 2 As shown, the liquid agent input pipe 205 inserted into the gas exhaust duct 2 passes through the center of the gas exhaust duct, runs from one end of the side wall of the gas exhaust duct to the other end of the side wall, and is perpendicular to the gas exhaust duct 2. There are multiple atomizing nozzles 6 as shown in the figure, and the multiple atomizing nozzles 6 are evenly distributed on the two horizontally opposite sides of the liquid agent input pipe; and the atomizing nozzles are atomizing liquid particles with a particle size between 500 and 100 μm.

[0017] In this embodiment, the liquid medicine storage tank 1 and the dispensing system surrounding the liquid medicine storage tank 1 adopt a skid-mounted transportation and installation structure. Therefore, in order to install quickly, the liquid medicine input interface 203 adopts a quick-plug connector interface, and the prepared medicine source 7 enters the liquid medicine storage tank 1 from the input port at the top of the liquid medicine storage tank 1.

[0018] To ensure that the liquid medicine in the liquid medicine storage tank remains uniform, the liquid medicine storage tank 1 described in this embodiment is equipped with a disturbance pump 8. The inlet of the disturbance pump 8 is connected to the lower end of the liquid medicine storage tank 1, and the outlet of the disturbance pump 8 is connected to the upper end of the liquid medicine storage tank 1. The disturbance pump 8 draws out the liquid medicine from the lower end of the liquid medicine storage tank 1 and then pours it in from the upper end of the liquid medicine storage tank 1, continuously stirring the liquid medicine to keep it in a uniform state.

[0019] In this embodiment, the sprayed atomized chemical solution is positioned 8 to 10 meters away from the inlet of the bag filter 3, allowing for a thorough reaction between the solution and chlorine-containing substances and related acidic salts in the coal gas. This removes most of the acidic toxins before the filter bags are used for dust collection, maximizing the lifespan of the desulfurization agent. Industrial application has demonstrated that this detoxification device has no adverse effects on existing equipment such as main pipelines and bag filters in subsequent processes.

Claims

1. A liquid reagent spraying device for desulfurizing blast furnace gas flue gas, used for detoxifying blast furnace gas, comprising a liquid reagent storage tank, a blast furnace gas exhaust duct, and a bag filter, wherein a dust collector connection interface for connecting to the bag filter is provided at the lower end of the vertical section of the gas exhaust duct, the dust collector connection interface being connected to the bag filter, characterized in that, A liquid agent input interface is installed on the vertical section of the gas flue above the dust collector connection interface, at a distance of 8 to 10 meters from the dust collector connection interface. The output pipeline of the liquid agent storage tank is connected to the liquid agent input interface via a metering pump. The liquid agent input interface is connected to a liquid agent input pipe. The liquid agent input pipe is inserted into the gas flue and welded to the side wall of the gas flue. An atomizing nozzle is installed on the liquid agent input pipe inserted into the gas flue.

2. The desulfurization liquid agent spraying device according to claim 1, characterized in that, The liquid agent input pipe inserted into the gas exhaust duct passes through the center of the gas exhaust duct and runs perpendicular to the gas exhaust duct from one end of the side wall to the other end. There are multiple atomizing nozzles, which are evenly distributed on the two horizontally opposite sides of the liquid agent input pipe.

3. The desulfurization liquid agent spraying device according to claim 1 or 2, characterized in that, The atomizing nozzle is an atomizing nozzle that sprays atomized liquid with a particle size between 500 and 100 μm.

4. The desulfurization liquid agent spraying device according to claim 1, characterized in that, The liquid medicine input interface uses a quick-plug connector.

5. The desulfurization liquid agent spraying device according to claim 1, characterized in that, The liquid medicine storage tank is equipped with a disturbance pump. The inlet of the disturbance pump is connected to the lower end of the liquid medicine storage tank, and the outlet of the disturbance pump is connected to the upper end of the liquid medicine storage tank.

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