CN218755579U - Hydrogen-carbon-rich circulating blast furnace matched gas heating furnace diffused gas recovery system - Google Patents
Hydrogen-carbon-rich circulating blast furnace matched gas heating furnace diffused gas recovery system Download PDFInfo
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- CN218755579U CN218755579U CN202223451286.4U CN202223451286U CN218755579U CN 218755579 U CN218755579 U CN 218755579U CN 202223451286 U CN202223451286 U CN 202223451286U CN 218755579 U CN218755579 U CN 218755579U
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Abstract
The utility model discloses a hydrogen-carbon-rich circulating blast furnace matching gas heating furnace diffused gas recovery system, which comprises a nitrogen purging device and a diffused gas collecting device, and is used for recovering diffused gas of the gas heating furnace, the gas heating furnace is connected with a cold gas branch pipe and a flue gas branch pipe, the cold gas branch pipe is communicated with a cold gas main pipe, a burner of the gas heating furnace is provided with a vault and a loop, the nitrogen purging device is communicated with the cold gas main pipe, the cold gas branch pipe, the flue gas branch pipe, the vault and the loop, and purges nitrogen for the cold gas main pipe, the cold gas branch pipe, the flue gas branch pipe, the vault and the loop; the diffused gas collecting device is used for collecting diffused gas to a gas pipe of the burning furnace for recycling, or conveying the diffused gas to the diffusion tower for burning. The utility model provides a supporting gas heating furnace of rich hydrogen carbon circulation blast furnace diffuses coal gas recovery system to diffusing coal gas recycle, has avoided the energy extravagant, has protected the environment simultaneously, has guaranteed staff's health.
Description
Technical Field
The utility model relates to a hydrogen-rich carbon circulating blast furnace supporting gas heating furnace replacement, the green environmental protection of diffused gas retrieve technical field, especially relate to a hydrogen-rich carbon circulating blast furnace supporting gas heating furnace diffused gas recovery system.
Background
In the production process of the gas heating furnace, the following gas discharge points are generated according to the process requirements:
(1) Replacing gas discharge: during the heating and burning process of the gas heating furnace, because the furnace is filled with high-heat value gas (CO), a large amount of air (O) exists in the initial stage of burning 2 ) Into the furnace to avoid O 2 When CO is in explosion accident, nitrogen (N) is needed 2 ) Blowing into the furnace to use N as CO in the furnace 2 The replacement ensures the production safety of each procedure of the gas heating furnace, and the replaced gas needs to be discharged out of the furnace.
(2) And (3) discharging the purging coal gas after the cold coal gas pipeline conveying the coal gas is finished: after the valve for conveying gas is closed, part of gas (CO) is remained in the cold gas pipeline, in order to avoid the remained CO and O in the process of burning the furnace 2 In case of explosion accident, N is needed to be carried out on a conveying pipeline with a certain length range in front of the heating furnace 2 Purging to ensure O 2 The content is lower than the explosion limit value, and the part of the gas passes through the outside of the purging discharge pipeline.
(3) The cold gas pipeline overhauls and sweeps the gas to be discharged outside; when the heating furnace device is annual inspected, N is needed to be carried out on the cold gas conveying pipeline 2 And purging to remove residual gas (CO) in the pipe, so that gas poisoning of workers is prevented, and the safety of maintainers is ensured, and the part of gas is purged and discharged out of the pipeline.
For the traditional hot blast stove of the iron-making blast furnace, the coal gas is directly discharged to the atmosphere, thereby causing energy waste and environmental pollution.
Therefore, how to recycle the diffused gas is a technical problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a hydrogen-rich carbon circulation supporting gas heating furnace diffuses coal gas recovery system to carry out recycle to diffusing coal gas.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a supporting gas heating furnace of rich hydrogen carbon circulation blast furnace diffuses coal gas recovery system for retrieve the diffused gas of gas heating furnace, the gas heating furnace is connected with cold coal gas branch pipe and flue gas branch pipe, cold coal gas branch pipe intercommunication is on cold coal gas is responsible for, the combustor of gas heating furnace is provided with vault and loop, its characterized in that includes:
the nitrogen purging device is communicated with the cold gas main pipe, the cold gas branch pipe, the smoke branch pipe and the vault and the circular passage and purges nitrogen for the cold gas main pipe, the cold gas branch pipe, the smoke branch pipe and the vault and the circular passage;
the diffused gas collecting device comprises a diffused gas collecting pipe, a diffused gas recycling pipe and a diffused gas pipe of the diffusing tower, wherein the diffused gas collecting pipe is communicated with the cold gas main pipe, the cold gas branch pipe and the smoke branch pipe and is used for collecting diffused gas; the diffused gas recovery pipe is communicated with the diffused gas collecting pipe and is used for conveying diffused gas to the furnace gas pipe; the diffused gas pipe of the diffusing tower is communicated with the diffused gas collecting pipe and is used for conveying diffused gas to the diffusing tower for combustion.
Optionally, in the above system for recovering bleed gas from a gas heating furnace associated with the hydrogen-rich carbon circulating blast furnace, the bleed gas collecting pipe includes:
the diffused waste gas pipe is communicated with the cold gas main pipe and the flue gas branch pipe and used for collecting diffused gas, and the diffused waste gas pipe is communicated with the diffused gas recovery pipe and the diffused gas pipe of the diffusing tower;
and the waste gas releasing pipe between the valves is communicated with the cold gas branch pipe and is used for collecting the released waste gas between the valves arranged on the cold gas branch pipe, and the waste gas releasing pipe between the valves is communicated with the gas releasing pipe of the releasing tower.
Optionally, in the system for recovering the diffused gas of the gas heating furnace matched with the hydrogen-carbon-rich circulating blast furnace, the diffused waste gas pipe is communicated with a cold gas main pipe gas diffused pipe and a furnace body replacement gas and flue gas branch pipe diffused gas pipe which are arranged in parallel;
a butterfly valve and a blind plate valve are sequentially arranged on the cold gas main pipe along the flowing direction of the air flow, one end of a gas diffusion pipe of the cold gas main pipe is communicated with the cold gas main pipe and is positioned between the butterfly valve and the blind plate valve, and the other end of the gas diffusion pipe of the cold gas main pipe is communicated with the diffusion gas recovery pipe;
the gas recovery furnace is characterized in that a first hydraulic chemical double-gate valve is arranged on the flue gas branch pipe, one end of the furnace body for replacing gas and the end of the flue gas branch pipe for diffusing gas are communicated with the flue gas branch pipe and are positioned at the upper stream of the first hydraulic chemical double-gate valve, and the other end of the furnace body is communicated with the diffused gas recovery pipe.
Optionally, in the system for recycling bleed gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace, the valves arranged on the cold gas branch pipe are a second hydraulic chemical double-gate valve and a hydraulic cut-off butterfly valve, the inter-valve bleed waste gas pipe is communicated with the cold gas branch pipe gas bleed pipe, one end of the cold gas branch pipe gas bleed pipe is communicated with the cold gas branch pipe and is located between the second hydraulic chemical double-gate valve and the hydraulic cut-off butterfly valve, and the other end of the cold gas branch pipe gas bleed pipe is communicated with the inter-valve bleed waste gas pipe.
Optionally, in the system for recovering the diffused gas of the gas heating furnace matched with the hydrogen-carbon-rich circulating blast furnace, the nitrogen purging device comprises a nitrogen purging main pipe and three nitrogen purging branch pipes arranged in parallel, wherein the three nitrogen purging branch pipes are respectively a first nitrogen purging branch pipe, a second nitrogen purging branch pipe and a third nitrogen purging branch pipe;
one end of the first nitrogen purging branch pipe is communicated with the nitrogen purging main pipe, and the other end of the first nitrogen purging branch pipe is communicated with the cold gas main pipe and is positioned between the butterfly valve and the cold gas main pipe gas diffusion pipe;
one end of the second nitrogen purging branch pipe is communicated with the nitrogen purging main pipe, and the other end of the second nitrogen purging branch pipe is communicated with the cold gas branch pipe and is positioned between the cold gas branch pipe gas diffusion pipe and the hydraulic cut-off butterfly valve;
one end of the third nitrogen purging branch pipe is communicated with the nitrogen purging main pipe, and the other end of the third nitrogen purging branch pipe is communicated with the flue gas branch pipe and the vault and the loop of the gas heating furnace.
Optionally, in the system for recovering the diffused gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace, the third nitrogen purging branch pipe comprises a fourth nitrogen purging branch pipe and a fifth nitrogen purging branch pipe which are arranged in parallel;
one end of the fourth nitrogen purging branch pipe is communicated with the third nitrogen purging branch pipe, and the other end of the fourth nitrogen purging branch pipe is communicated with the flue gas branch pipe and is positioned between the first hydraulic chemical engineering double-gate valve and the furnace body replacement gas and the flue gas branch pipe bleeding gas pipe;
one end of the fifth nitrogen purging branch pipe is communicated with the third nitrogen purging branch pipe, and the other end of the fifth nitrogen purging branch pipe is communicated with the vault and the annular channel.
Optionally, in the system for recovering the diffused gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace, a carbon monoxide concentration detection device is arranged at the downstream of the diffused waste gas pipe.
Optionally, in the system for recycling the diffused gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace, when the concentration detected by the carbon monoxide concentration detection device is greater than or equal to a preset concentration, the communication pipeline between the diffused waste gas pipe and the diffused gas recycling pipe is in a communication state, and the communication pipeline between the diffused waste gas pipe and the diffused gas pipe of the diffusion tower is in a cut-off state;
when the concentration detected by the carbon monoxide concentration detection device is less than the preset concentration, the communication pipeline of the diffused waste gas pipe and the diffused gas pipe of the diffusion tower is in a communicated state, and the communication pipeline of the diffused waste gas pipe and the diffused gas recovery pipe is in a cut-off state.
Optionally, in the system for recycling the diffused gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace, a first manual gate valve, a first hydraulic fast-cutting butterfly valve, a first hydraulic blind plate valve, a check valve and a second manual gate valve are sequentially arranged on a communicating pipeline of the diffused waste gas pipe and the diffused gas recycling pipe along the flow direction of the diffused gas in a reverse direction;
the waste gas diffusing pipe is communicated with the lower part of the second hydraulic blind plate valve on the diffusing tower diffusing gas pipe.
Optionally, in the system for recovering the diffused gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace, a manual valve is arranged on the diffused gas pipe of the diffusion tower.
The utility model provides a supporting gas heating furnace of rich hydrogen carbon circulation blast furnace diffuses coal gas recovery system for retrieve the diffused gas of gas heating furnace. The gas heating furnace is connected with a cold gas branch pipe and a flue gas branch pipe, the cold gas branch pipe is communicated with the cold gas main pipe, and a burner of the gas heating furnace is provided with a vault and a loop. The utility model provides a supporting coal gas heating furnace of rich hydrogen carbon circulation blast furnace diffuses coal gas recovery system, include that nitrogen gas sweeps the device and diffuses coal gas collection device, nitrogen gas sweeps the device and communicates in cold coal gas main pipe, cold coal gas branch pipe, flue gas branch pipe and vault and ring road, to cold coal gas main pipe, cold coal gas branch pipe, flue gas branch pipe and vault and ring road sweep nitrogen gas. The diffused gas collecting device comprises a diffused gas collecting pipe, a diffused gas recycling pipe and a diffused gas pipe of the diffusing tower, wherein the diffused gas collecting pipe is communicated with the cold gas main pipe, the cold gas branch pipe and the smoke branch pipe and is used for collecting diffused gas discharged after nitrogen purging; the diffused gas recovery pipe is communicated with the diffused gas collecting pipe and is used for conveying diffused gas to the furnace burning gas pipe for recycling; the diffused gas pipe of the diffusing tower is communicated with the diffused gas collecting pipe and is used for conveying diffused gas to the diffusing tower for combustion and carrying out ignition diffusion harmless treatment. The utility model provides a supporting coal gas heating furnace of rich hydrogen carbon circulation blast furnace diffuses coal gas recovery system to diffusing coal gas recycle, avoided the energy extravagant, protected the environment simultaneously, guaranteed staff's health.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a diffused gas recovery system of a gas heating furnace matched with a hydrogen-rich carbon circulating blast furnace disclosed by the embodiment of the utility model.
The meaning of the various reference symbols in the figures is as follows:
100 is a gas heating furnace, 110 is a flue gas branch pipe, and 111 is a first hydraulic chemical double-gate valve;
200 is a cold gas main pipe, 201 is a butterfly valve, 202 is a blind plate valve, 210 is a cold gas branch pipe, 211 is a second hydraulic chemical industry double gate valve, and 212 is a hydraulic cut-off butterfly valve;
300 is a nitrogen purging main pipe, 310 is a first nitrogen purging branch pipe, 320 is a second nitrogen purging branch pipe, 330 is a third nitrogen purging branch pipe, 331 is a fourth nitrogen purging branch pipe, and 332 is a fifth nitrogen purging branch pipe;
400 is a diffused gas collecting pipe, 410 is a diffused waste gas pipe, 411 is a cold gas branch pipe gas diffusing pipe, 420 is an intervalve diffused waste gas pipe, 421 is a cold gas main pipe gas diffusing pipe, 422 is a furnace body replacement gas and flue gas branch pipe diffused gas diffusing pipe, 423 is a first manual ball valve, 424 is a pneumatic diffused ball valve, 425 is a second manual ball valve, 426 is a hydraulic waste gas ball valve, 427 is a pneumatic waste gas regulating valve, and 428 is a third manual ball valve;
500 is a diffused gas recovery pipe, 510 is a first manual gate valve, 520 is a first hydraulic fast-cut butterfly valve, 530 is a first hydraulic blind plate valve, 540 is a check valve, and 550 is a second manual gate valve;
600 is a diffusing gas pipe of a diffusing tower, 610 is a third manual gate valve, 620 is a second hydraulic quick-cut butterfly valve, 630 is a second hydraulic blind plate valve, and 640 is a manual valve;
700 is a gas pipe of a burning furnace;
800 is a diffusing tower;
and 900 is a carbon monoxide detection device.
Detailed Description
The core of the utility model is to provide a hydrogen-rich carbon circulating blast furnace matched gas heating furnace diffused gas recovery system to recycle the diffused gas.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in figure 1, the embodiment of the utility model discloses a supporting gas heating furnace of hydrogen-rich carbon circulation blast furnace diffuses coal gas recovery system for retrieve the diffused gas of gas heating furnace 100, include that nitrogen gas sweeps device and diffuse coal gas collection device.
In practical applications, the gas heating furnace 100 is usually provided in a plurality of numbers, and for convenience of description, one gas heating furnace 100 will be described as an example hereinafter. The gas heating furnace 100 is connected with a cold gas branch pipe 210 and a flue gas branch pipe 110, wherein the cold gas branch pipe 210 is communicated with the cold gas main pipe 200, and a burner of the gas heating furnace 100 is provided with a vault and a loop. The gas heating furnace 100 comprises a furnace burning process and an air supply process, wherein the furnace burning process means that furnace burning gas and combustion-supporting air conveyed by a furnace burning gas pipe 700 are burned in a burner of the gas heating furnace 100, generated high-temperature flue gas heats a checker brick, and generated waste gas is discharged into a chimney through a flue gas branch pipe 110; the air supply process means that cold gas conveyed by the cold gas main pipe 200 enters the gas heating furnace 100, the lattices heat the cold gas, and the heated cold gas is conveyed to the blast furnace.
The nitrogen purging device is communicated with the cold gas main pipe 200, the cold gas branch pipe 210, the flue gas branch pipe 110, the vault and the circular passage, and purges nitrogen for the cold gas main pipe 200, the cold gas branch pipe 210, the flue gas branch pipe 110, the vault and the circular passage. The diffused gas collecting device comprises a diffused gas collecting pipe 400, a diffused gas recycling pipe 500 and a diffused gas pipe 600 of the diffusing tower. Wherein, the diffused gas collecting pipe 400 is communicated with the cold gas main pipe 200, the cold gas branch pipe 210 and the flue gas branch pipe 110, and is used for collecting the diffused gas which is replaced by nitrogen; the diffused gas recovery pipe 500 is communicated with the diffused gas collection pipe 400 and is used for conveying diffused gas to the furnace gas pipe 700 for recycling; the diffused gas pipe 600 of the diffusing tower is communicated with the diffused gas collecting pipe 400 and is used for conveying the diffused gas to the diffusing tower 800 for combustion.
When the gas heating furnace 100 is in the period of switching between the furnace burning process and the air supply process, in order to avoid explosion accidents, nitrogen replacement purging needs to be performed on the gas heating furnace 100, the cold gas branch pipe 210, the flue gas branch pipe 110, the vault and the circular path of the burner; when the gas heating furnace 100 needs to be overhauled, nitrogen replacement purging needs to be performed on the cold gas main pipe 200, the cold gas branch pipe 210 and the flue gas branch pipe 110. The diffused gas discharged by the nitrogen replacement enters the diffused gas collecting pipe 400, and when the concentration of the diffused gas is suitable for recycling, the diffused gas enters the diffused gas recycling pipe 500, and then is conveyed into the furnace burning gas pipe 700 to enter the burner along with the furnace burning gas for burning, so that the diffused gas is recycled. When the concentration of the diffused gas is not suitable for recycling, the diffused gas enters a diffused gas pipe 600 of the diffusion tower and is conveyed to the diffusion tower 800 for ignition and diffusion harmless treatment.
The utility model provides a supporting gas heating furnace of rich hydrogen carbon circulation blast furnace diffuses coal gas recovery system to diffusing coal gas recycle, has avoided the energy extravagant, has protected the environment simultaneously, has guaranteed staff's health.
In one embodiment of the present invention, the purge gas collecting pipe 400 includes a purge gas pipe 410 and a valve room purge gas pipe 420. The waste gas diffusing pipe 410 is communicated with the main cold gas pipe 200 and the branch flue gas pipe 110 and is used for collecting diffused gas in the main cold gas pipe 200 and the branch flue gas pipe 110, the waste gas diffusing pipe 410 is communicated with the gas diffusing recovery pipe 500 and the gas diffusing pipe 600 of the diffusing tower, when the concentration of the diffused gas is suitable for recycling, the diffused gas enters the burning furnace gas pipe 700 through the gas diffusing recovery pipe 500 for recycling, and when the concentration of the diffused gas is not suitable for recycling, the diffused gas enters the diffusing tower 800 through the gas diffusing pipe 600 of the diffusing tower for burning, and the harmless treatment of ignition and diffusion is carried out.
The inter-valve waste gas discharge pipe 420 is communicated with the cold gas branch pipe 210 and is used for collecting the discharge gas between the valves arranged on the cold gas branch pipe, and the inter-valve waste gas discharge pipe 420 is communicated with the discharge tower discharge gas pipe 600. It should be noted that the amount of the diffused gas between the valves on the cold gas branch pipe is small, so that the diffused gas is not recycled, and directly enters the diffusion tower 800 through the diffusion tower diffused gas pipe 600 for combustion.
In an embodiment of the present invention, the waste gas discharging pipe 410 is connected to the cold gas main pipe 421 and the furnace body replacement gas and flue gas branch pipe 422, wherein the cold gas main pipe 421 is used to discharge the discharged gas between the valves disposed on the cold gas main pipe 200, and the furnace body replacement gas and flue gas branch pipe 422 is used to discharge the dome of the burner and the discharged gas of the circular path and the discharged gas of the flue gas branch pipe 110.
Specifically, a butterfly valve 201 and a blind plate valve 202 are sequentially arranged on the cold gas main pipe 200 along the airflow flowing direction, one end of the cold gas main pipe gas diffusion pipe 421 is communicated with the cold gas main pipe 200 and is positioned between the butterfly valve 201 and the blind plate valve 202, and the other end is communicated with the diffusion gas recovery pipe 500. In a specific embodiment, the gas diffusion pipe 421 of the cold gas main pipe is sequentially provided with a first manual ball valve 423, a pneumatic diffusion ball valve 424 and a second manual ball valve 425 along the flowing direction of the gas flow.
The flue gas branch pipe 110 is provided with a first hydraulic chemical double-gate valve 111, one end of the furnace body gas replacement and flue gas branch pipe gas emission pipe 422 is communicated with the flue gas branch pipe 110 and is positioned at the upstream of the first hydraulic chemical double-gate valve 111, and the other end is communicated with the gas emission recovery pipe 500. In one embodiment, the hydraulic waste gas ball valve 426, the pneumatic waste gas regulating valve 427 and the third manual ball valve 428 are sequentially arranged on the furnace body gas replacement and flue gas branch pipe gas emission pipe 422 along the flow direction of the gas flow, wherein the hydraulic waste gas ball valve 426 and the third manual ball valve 428 are used for closing, and the pneumatic waste gas regulating valve 427 is used for regulating.
As shown in fig. 1, on the basis of the above embodiment, the inter-valve waste gas discharging pipe 420 is communicated with the cold gas branch pipe gas discharging pipe 411, the cold gas branch pipe 210 is sequentially provided with the second hydraulic chemical double-gate valve 211 and the hydraulic cut-off butterfly valve 212 along the flow direction of the gas flow, one end of the cold gas branch pipe gas discharging pipe 411 is communicated with the cold gas branch pipe 210 and is located between the second hydraulic chemical double-gate valve 211 and the hydraulic cut-off butterfly valve 212, and the other end is communicated with the inter-valve waste gas discharging pipe 420 for discharging the discharged gas between the second hydraulic chemical double-gate valve 211 and the hydraulic cut-off butterfly valve 212. In one embodiment, the type of valve disposed on the cold gas branch pipe gas bleeding pipe 411 in the direction of gas flow is the same as the type of valve disposed on the cold gas main pipe gas bleeding pipe 421.
As shown in fig. 1, the nitrogen purging device includes a nitrogen purging main pipe 300 and three nitrogen purging branch pipes arranged in parallel, which are a first nitrogen purging branch pipe 310, a second nitrogen purging branch pipe 320, and a third nitrogen purging branch pipe 330, respectively. When the first nitrogen purging branch pipe 310 performs nitrogen purging on the cold gas main pipe 200, the purged and diffused gas enters the cold gas main pipe gas diffusing pipe 421 and is discharged into the diffused and exhausted gas pipe 410.
One end of the second nitrogen purging branch pipe 320 is communicated with the nitrogen purging main pipe 300, and the other end is communicated with the cold gas branch pipe 210 and is positioned between the cold gas branch pipe gas diffusion pipe 411 and the hydraulic pressure cut-off butterfly valve 212. When the second nitrogen purge branch pipe 320 performs nitrogen purge on the cold gas branch pipe 210, the diffused gas between the second hydraulic chemical engineering double-gate valve 211 and the hydraulic cutoff butterfly valve 212 enters the cold gas branch pipe gas diffusion pipe 411.
One end of the third nitrogen purging branch pipe 330 is communicated with the nitrogen purging main pipe 300, and the other end is communicated with the flue gas branch pipe 110 and the vault and the loop of the gas heating furnace 100. When the third nitrogen purging branch pipe 330 performs nitrogen purging on the vault and the loop of the flue gas branch pipe 110 and the gas heating furnace 100, the diffused gas displaced by the nitrogen enters the furnace body for displacing the gas and the flue gas branch pipe diffused gas pipe 422.
On the basis of the above-described embodiment, the third nitrogen purge branch pipe 330 includes the fourth nitrogen purge branch pipe 331 and the fifth nitrogen purge branch pipe 332 disposed in parallel. One end of the fourth nitrogen purging branch pipe 331 is communicated with the third nitrogen purging branch pipe 330, and the other end of the fourth nitrogen purging branch pipe is communicated with the flue gas branch pipe 110 and is positioned between the first hydraulic chemical engineering double-gate valve 111 and the furnace body replacement gas and flue gas branch pipe bleeding gas pipe 422;
one end of the fifth nitrogen purging branch pipe 332 is communicated with the third nitrogen purging branch pipe 330, and the other end is communicated with the vault and the loop. In a specific embodiment, the valves disposed on the fourth nitrogen purging branch pipe 331 and the fifth nitrogen purging branch pipe 332 in the flow direction of the gas flow are the same type as the valves disposed on the cold gas main gas discharging pipe 421.
The embodiment of the utility model discloses a supporting coal gas heating furnace of rich hydrogen carbon circulation blast furnace diffuses coal gas recovery system is provided with carbon monoxide concentration detection device 900 in the low reaches of diffusing waste gas pipe 410. It should be noted that the downstream of the waste gas exhaust pipe 410 refers to the pipe section where the flue gas discharged from the flue gas branch pipe 110, the arch crown and the ring passage are mixed with the waste gas discharged from the cold gas main pipe 200. The carbon monoxide concentration detection device 900 is configured to detect the concentration of carbon monoxide in the mixed diffused gas, and determine whether to recycle the mixed diffused gas according to the detected concentration.
On the basis of the above embodiment, when the concentration detected by the carbon monoxide concentration detecting device 900 is greater than or equal to the preset concentration, the communication pipeline between the waste gas diffusing pipe 410 and the waste gas diffusing pipe 500 is in a communication state, the communication pipeline between the waste gas diffusing pipe 410 and the waste gas diffusing pipe 600 of the diffusing tower is in a cut-off state, and the diffused gas enters the burner gas pipe 700 through the waste gas diffusing pipe 500 for recycling.
When the concentration detected by the carbon monoxide concentration detection device 900 is less than the preset concentration, the communication pipeline between the waste gas diffusing pipe 410 and the gas diffusing pipe 600 of the diffusing tower is in a communicated state, the communication pipeline between the waste gas diffusing pipe 410 and the gas diffusing recovery pipe 500 is in a cut-off state, and the diffused gas enters the diffusing tower 800 through the gas diffusing pipe 600 of the diffusing tower to be ignited and diffused for harmless treatment. It will be understood by those skilled in the art that the specific predetermined concentration may be determined according to specific conditions, for example, the predetermined concentration may be 20%.
In a specific embodiment, a first manual gate valve 510, a first hydraulic fast-cut butterfly valve 520, a first hydraulic blind valve 530, a check valve 540 and a second manual gate valve 550 are sequentially arranged on a communication pipeline of the waste gas diffusing pipe 410 and the waste gas diffusing pipe 500 along the flow direction of the diffused gas; the communicating pipeline of the waste gas diffusing pipe 410 and the gas diffusing pipe 600 of the diffusing tower is sequentially provided with a third manual gate valve 610, a second hydraulic quick-switching butterfly valve 620 and a second hydraulic blind plate valve 630 along the flowing direction of the diffused gas, and the waste gas diffusing pipe 420 between the valves is communicated with the gas diffusing pipe 600 of the diffusing tower and is positioned at the downstream of the second hydraulic blind plate valve 630.
When the concentration detected by the carbon monoxide concentration detection device 900 is greater than or equal to the preset concentration, the first manual gate valve 510, the first hydraulic quick-cutting butterfly valve 520, the first hydraulic blind plate valve 530, the check valve 540 and the second manual gate valve 550 are in an open state, the third manual gate valve 610, the second hydraulic quick-cutting butterfly valve 620 and the second hydraulic blind plate valve 630 are in a closed state, and the released gas enters the burner gas pipe 700 through the released gas recovery pipe 500 for recycling.
When the concentration detected by the carbon monoxide concentration detection device 900 is less than the preset concentration, the first manual gate valve 510, the first hydraulic fast-cutting butterfly valve 520, the first hydraulic blind plate valve 530, the check valve 540 and the second manual gate valve 550 are in a closed state, the third manual gate valve 610, the second hydraulic fast-cutting butterfly valve 620 and the second hydraulic blind plate valve 630 are in an open state, and the diffused coal gas enters the diffusion tower 800 through the diffusion tower diffused coal gas pipe 600 to be ignited and diffused for harmless treatment.
In an embodiment of the present invention, the manual valve 640 is disposed on the bleeding gas pipe 600 of the bleeding tower, and the manual valve 640 is in a normally open state during the nitrogen purging and replacing stage.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising a component of ' 8230 ' \8230; ' does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.
Claims (10)
1. The utility model provides a supporting gas heating furnace of rich hydrogen carbon circulation blast furnace diffuses coal gas recovery system for retrieving the diffusion coal gas of gas heating furnace (100), gas heating furnace (100) are connected with cold coal gas branch pipe (210) and flue gas branch pipe (110), cold coal gas branch pipe (210) communicate on cold coal gas is responsible for (200), the combustor of gas heating furnace (100) is provided with vault and return circuit, its characterized in that includes:
the nitrogen purging device is communicated with the cold gas main pipe (200), the cold gas branch pipe (210), the smoke branch pipe (110) and the vault and the circular channel, and is used for purging nitrogen for the cold gas main pipe (200), the cold gas branch pipe (210), the smoke branch pipe (110) and the vault and the circular channel;
the diffused gas collecting device comprises a diffused gas collecting pipe (400), a diffused gas recycling pipe (500) and a diffused gas pipe (600) of the diffusing tower, wherein the diffused gas collecting pipe (400) is communicated with the cold gas main pipe (200), the cold gas branch pipe (210) and the smoke branch pipe (110) and is used for collecting diffused gas; the diffused gas recovery pipe (500) is communicated with the diffused gas collection pipe (400) and is used for conveying diffused gas to the furnace gas burning pipe (700); the diffused gas pipe (600) of the diffusing tower is communicated with the diffused gas collecting pipe (400) and used for conveying diffused gas to the diffusing tower (800) for combustion.
2. The system for recovering the off-gas of the hydrogen-rich carbon-cycle blast furnace supporting gas heating furnace according to claim 1, wherein the off-gas collecting pipe (400) comprises:
the diffused waste gas pipe (410) is communicated with the cold gas main pipe (200) and the flue gas branch pipe (110) and is used for collecting diffused gas, and the diffused waste gas pipe (410) is communicated with the diffused gas recovery pipe (500) and the diffused gas pipe (600) of the diffusing tower;
and the waste gas releasing pipe (420) between the valves is communicated with the cold gas branch pipe (210) and is used for collecting the released gas between the valves arranged on the cold gas branch pipe (210), and the waste gas releasing pipe (420) between the valves is communicated with the gas releasing pipe (600) of the releasing tower.
3. The system for recycling the diffused gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace as claimed in claim 2, wherein the diffused waste gas pipe (410) is communicated with a cold gas main pipe gas diffusion pipe (421) and a furnace body replacement gas and flue gas branch pipe diffused gas pipe (422) which are arranged in parallel;
a butterfly valve (201) and a blind plate valve (202) are sequentially arranged on the cold gas main pipe (200) along the flowing direction of the air flow, one end of a gas diffusion pipe (421) of the cold gas main pipe is communicated with the cold gas main pipe (200) and is positioned between the butterfly valve (201) and the blind plate valve (202), and the other end of the gas diffusion pipe is communicated with the diffusion gas recovery pipe (500);
the gas recovery furnace is characterized in that a first hydraulic chemical double-gate valve (111) is arranged on the flue gas branch pipe (110), one end of a furnace body gas replacement and flue gas branch pipe diffusion gas pipe (422) is communicated with the flue gas branch pipe (110) and is positioned at the upstream of the first hydraulic chemical double-gate valve (111), and the other end of the furnace body gas replacement and flue gas branch pipe diffusion gas pipe is communicated with the diffusion gas recovery pipe (500).
4. The system for recycling the released gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace according to claim 3, wherein the valves arranged on the cold gas branch pipe (210) are a second hydraulic chemical double-gate valve (211) and a hydraulic cut-off butterfly valve (212), the valve-room released waste gas pipe (420) is communicated with the cold gas branch pipe gas release pipe (411), one end of the cold gas branch pipe gas release pipe (411) is communicated with the cold gas branch pipe (210) and is positioned between the second hydraulic chemical double-gate valve (211) and the hydraulic cut-off butterfly valve (212), and the other end of the cold gas branch pipe gas release pipe is communicated with the valve-room released waste gas pipe (420).
5. The system for recovering the diffused gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace as claimed in claim 4, wherein the nitrogen purging device comprises a nitrogen purging main pipe (300) and three nitrogen purging branch pipes arranged in parallel, wherein the three nitrogen purging branch pipes are a first nitrogen purging branch pipe (310), a second nitrogen purging branch pipe (320) and a third nitrogen purging branch pipe (330);
one end of the first nitrogen purging branch pipe (310) is communicated with the nitrogen purging main pipe (300), the other end of the first nitrogen purging branch pipe is communicated with the cold gas main pipe (200), and the first nitrogen purging branch pipe is positioned between the butterfly valve (201) and the cold gas main pipe gas diffusing pipe (421);
one end of the second nitrogen purging branch pipe (320) is communicated with the nitrogen purging main pipe (300), the other end of the second nitrogen purging branch pipe is communicated with the cold gas branch pipe (210), and the second nitrogen purging branch pipe is located between the cold gas branch pipe gas diffusion pipe (411) and the hydraulic cut-off butterfly valve (212);
one end of the third nitrogen purging branch pipe (330) is communicated with the nitrogen purging main pipe (300), and the other end of the third nitrogen purging branch pipe is communicated with the flue gas branch pipe (110) and the vault and the loop of the gas heating furnace (100).
6. The system for recovering the diffused gas of the hydrogen-rich carbon circulation blast furnace supporting gas heating furnace according to claim 5, wherein the third nitrogen purging branch pipe (330) comprises a fourth nitrogen purging branch pipe (331) and a fifth nitrogen purging branch pipe (332) which are arranged in parallel;
one end of the fourth nitrogen purging branch pipe (331) is communicated with the third nitrogen purging branch pipe (330), and the other end of the fourth nitrogen purging branch pipe is communicated with the flue gas branch pipe (110) and is positioned between the first hydraulic chemical industry double gate valve (111) and the furnace body replacement gas and flue gas branch pipe diffusion gas pipe (422);
one end of the fifth nitrogen purging branch pipe (332) is communicated with the third nitrogen purging branch pipe (330), and the other end of the fifth nitrogen purging branch pipe is communicated with the vault and the loop.
7. The system for recovering the purge gas of the gas heating furnace associated with the hydrogen-rich carbon recycling blast furnace according to any one of claims 2 to 6, wherein a carbon monoxide concentration detecting device (900) is provided downstream of the purge gas pipe (410).
8. The system for recycling the released gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace according to claim 7, wherein when the concentration detected by the carbon monoxide concentration detection device (900) is greater than or equal to a preset concentration, the communication pipeline between the released waste gas pipe (410) and the released gas recycling pipe (500) is in a communication state, and the communication pipeline between the released waste gas pipe (410) and the released gas pipe (600) of the release tower is in a cut-off state;
when the concentration detected by the carbon monoxide concentration detection device (900) is less than the preset concentration, the communication pipeline of the diffused waste gas pipe (410) and the diffused gas pipe (600) of the diffusion tower is in a communicated state, and the communication pipeline of the diffused waste gas pipe (410) and the diffused gas recovery pipe (500) is in a cut-off state.
9. The system for recycling the released gas of the gas heating furnace matched with the hydrogen-rich carbon circulating blast furnace as claimed in claim 8, wherein a communicating pipeline between the released waste gas pipe (410) and the released gas recycling pipe (500) is provided with a first manual gate valve (510), a first hydraulic fast-cutting butterfly valve (520), a first hydraulic blind plate valve (530), a check valve (540) and a second manual gate valve (550) in sequence along the flow direction of the released gas;
the utility model discloses a gas stove, including the waste gas pipe of diffusing (600), diffuse waste gas pipe (410) and diffuse tower diffuse communicating pipe of gas pipe (600) and follow on the road the flow direction of the gas of diffusing has set gradually third manual gate valve (610), second hydraulic pressure fast cut butterfly valve (620) and second hydraulic pressure blind plate valve (630), diffuse waste gas pipe (420) between the valve communicate in on the gas pipe of diffusing (600) of diffusing tower and be located the low reaches of second hydraulic pressure blind plate valve (630).
10. The system for recycling the purge gas of the gas heating furnace associated with the hydrogen-rich carbon recycling blast furnace as claimed in claim 9, wherein a manual valve (640) is provided on the purge gas pipe (600) of the purge tower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223451286.4U CN218755579U (en) | 2022-12-22 | 2022-12-22 | Hydrogen-carbon-rich circulating blast furnace matched gas heating furnace diffused gas recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223451286.4U CN218755579U (en) | 2022-12-22 | 2022-12-22 | Hydrogen-carbon-rich circulating blast furnace matched gas heating furnace diffused gas recovery system |
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| CN218755579U true CN218755579U (en) | 2023-03-28 |
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| CN202223451286.4U Active CN218755579U (en) | 2022-12-22 | 2022-12-22 | Hydrogen-carbon-rich circulating blast furnace matched gas heating furnace diffused gas recovery system |
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| Country | Link |
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| CN (1) | CN218755579U (en) |
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