CN201857398U - Blast furnace top pressure control system adopting coal gas dry method dust remover - Google Patents
Blast furnace top pressure control system adopting coal gas dry method dust remover Download PDFInfo
- Publication number
- CN201857398U CN201857398U CN2010202349404U CN201020234940U CN201857398U CN 201857398 U CN201857398 U CN 201857398U CN 2010202349404 U CN2010202349404 U CN 2010202349404U CN 201020234940 U CN201020234940 U CN 201020234940U CN 201857398 U CN201857398 U CN 201857398U
- Authority
- CN
- China
- Prior art keywords
- valve group
- trt
- reducing valve
- gas reducing
- purified gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a blast furnace top pressure control system adopting a coal gas dry method dust remover, wherein one path of an inlet pipeline is connected to a coarse coal gas pressure reducing valve group, the other path of the inlet pipeline is connected to the coal gas dry method dust remover and is then divided into two paths, one path passes through a pure coal gas pressure reducing valve group, the other path enters a heat treated (TRT) system through a TRT fixed blade/fast opening regulation valve group, the two paths are connected to a pure coal gas pipeline network inlet after being converged, and a coarse coal gas pressure reducing valve group control module, a pure coal gas pressure reducing valve group control module and a TRT fixed blade/fast opening regulation valve group control module are mutually connected, are connected to the inlet pipeline through a cloth bag front temperature sensor, a first coal gas pressure sensor and a second coal gas pressure sensor and are also respectively connected to the coarse coal gas pressure reducing valve group, the pure coal gas pressure reducing valve group and the TRT fixed blade/fast opening regulation valve group. The blast furnace top pressure control system can realize the stable blast furnace top pressure.
Description
Technical field
The utility model relates to the blast furnace ironmaking gas dust removal system that adopts dry cloth bag technology, particularly relates to raw gas reducing valve group, purified gas reducing valve group and TRT (blast-furnace top gas recovery turbine generator) the three covering devices Controlling System to furnace top pressure.
Background technology
Large blast furnace coal gas is absolutely dry, and the method dust settling pocket technique is an emerging blast furnace ironmaking environment friendly dedusting technology.Compare with wet dedusting, dry-method bag-type dust collecting has substantially not water, can not produce water pollutes, energy consumption is little, the advantage that working cost is low, belong to the environmental protection and energy saving project, economical, societal benefits are remarkable, are positioned at first of " three do " (blast furnace gas dry dusting, converter gas dry method dedusting, dry coke quenching and the blast furnace gas excess pressure power generating) that the current emphasis of national steel industry promotes.
Along with development of material technology, dust-removal cloth-bag is general now to adopt resistant to elevated temperatures compound glass pricker dimension Nomex filter cloth to make, but the temperature that can bear also can only be within 280 ℃.In order to protect cloth bag, in a single day throat temperature surpasses this temperature, or is lower than certain temperature (as 100 ℃, be lower than dew point, the coal gas dust lumps on cloth bag easily), and coal gas just need diffuse tower and diffuse by raw gas reducing valve group, raw gas; The TRT system also may need to shut down at run duration because of trouble shooting; Blast furnace staying and multiple wind also need this three covering device of raw gas reducing valve group, purified gas reducing valve group and TRT system to withdraw to regulate and recover adjusting to furnace top pressure; Like this, the control of furnace top pressure will be switched between this three covers performer of raw gas reducing valve group, purified gas reducing valve group and TRT system.And during blast-furnace smelting, higher requirement is arranged to stablizing furnace top pressure, if the furnace top pressure fluctuation is bigger, can cause working of a furnace shakiness, even have serious accident and take place.In the process that three cover performer switch, how to adopt a kind of control method to guarantee that stable just the seeming of blast furnace top pressure is even more important.
At present; each blast furnace substantially all is manually to switch; because the stator blade of TRT system/drive variable valve soon generally to be responsible for by the different posies of two posies even two factories (power source factory and iron work) respectively with thick/purified gas reducing valve group; operational coordination goes wrong often; furnace top pressure has than great fluctuation process; often shift onto each other between two posies, had a strong impact on normal stable production.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of blast furnace gas dry dusting top pressure control system is provided, when blast furnace gas dry dusting is regulated roof pressure, can between TRT system, raw gas reducing valve group, three performer of purified gas reducing valve group, realize automaticallying switch by this Controlling System.
The technical scheme that the utility model adopted is: the blast furnace top pressure control system that adopts gas dry-method dust-removal device, comprise coal gas diffusion tower, gas dry-method dust-removal device, purified gas pipe network and TRT system, it also comprises raw gas reducing valve group, purified gas reducing valve group and TRT stator blade/open the variable valve group soon, and controls raw gas reducing valve group control module, purified gas reducing valve group control module and the TRT stator blade of these three kinds of valve groups/open soon variable valve group control module respectively;
The blast furnace gas inlet duct is divided into two-way, leads up to the winding of raw gas reducing valve to the coal gas diffusion tower; Another road is connected to gas dry-method dust-removal device, and then is divided into two-way, leads up to purified gas reducing valve group, and another road is connected to purified gas pipe network inlet by TRT stator blade/open the variable valve group soon to enter the TRT system after this two-way converges;
Raw gas reducing valve group control module, purified gas reducing valve group control module and TRT stator blade/open soon between the variable valve group control module are interconnected, and are connected to the inlet duct of blast furnace gas by temperature sensor, the first gas pressure transmitter, the second gas pressure transmitter before the cloth bag; Raw gas reducing valve group control module, purified gas reducing valve group control module and TRT stator blade/open soon variable valve group control module also is connected to raw gas reducing valve group, purified gas reducing valve group and TRT stator blade/open soon variable valve group respectively.
Advantage of the present utility model: after using this Controlling System, can realize automatically that according to switching condition three overlap the mutual switching between the roof pressure operating devices, handoff procedure can be realized the stable of blast furnace top pressure.
Description of drawings
Fig. 1 is the structured flowchart of the utility model Controlling System.
Among Fig. 1,101: raw gas reducing valve group; 201: purified gas reducing valve group; 301: the compound expansion turbine; 302: brushless excitation generator; 401: gas dry-method dust-removal device; TE-W01: temperature sensor before the cloth bag; PE-W01A: the first gas pressure transmitter; PE-W01B: the second gas pressure transmitter; V-W11: raw gas butterfly valve; V-W12: raw gas push-pull valve; V-W21: purified gas reducing valve group back card/back board valve; V-W22: butterfly valve after the purified gas reducing valve group; The V-W31:TRT butterfly valve that enters the mouth; The V-W32:TRT push-pull valve that enters the mouth; V-W33:TRT exports push-pull valve; The V-W34:TRT exit butterfly valve; T-1: raw gas diffuses tower; PV-W11: raw gas reducing valve group first variable valve; PV-W12: raw gas reducing valve group second variable valve; PV-W13: raw gas reducing valve group range valve; PV-W14: raw gas reducing valve group safety valve; PV-W21: purified gas reducing valve group first variable valve; PV-W22: purified gas reducing valve group second variable valve; PV-W23: purified gas reducing valve group range valve; PV-W24: purified gas reducing valve group safety valve; The PV-101:TRT stator blade; PV-102:TRT cuts valve soon; PV-103:TRT drives variable valve soon; PC-W1: raw gas reducing valve group control module; PC-W2: purified gas reducing valve group control module; PC-101:TRT stator blade/open soon variable valve group control module.
Embodiment
As shown in Figure 1, adopt the blast furnace top pressure control system of gas dry-method dust-removal device, comprise coal gas diffusion tower T-1, gas dry-method dust-removal device 401, purified gas pipe network and TRT system, it also comprises raw gas reducing valve group 101, purified gas reducing valve group 201, TRT stator blade/open the variable valve group soon, and controls raw gas reducing valve group control module PC-W1, purified gas reducing valve group control module PC-W2, the TRT stator blade of these three kinds of valve groups/open soon variable valve group control module PC-101 respectively.
Blast furnace gas produces from blast furnace, by being divided into two-way behind the gravitational precipitator, leads up to raw gas reducing valve group 101, enters coal gas diffusion tower T-1; Another road is divided into two-way again by gas dry-method dust-removal device 401, leads up to purified gas reducing valve group 201, and another road enters the TRT system then by TRT stator blade/open the variable valve group soon, and this two-way converges and enters the purified gas pipe network at last.
Raw gas reducing valve group control module PC-W1, purified gas reducing valve group control module PC-W2 and TRT stator blade/open soon between the variable valve group control module are interconnected, and by temperature sensor TE-W01, the first gas pressure transmitter PE-W01A, the second gas pressure transmitter PE-W02A before the cloth bag pipeline that enters of blast furnace gas are monitored; Raw gas reducing valve group control module PC-W1, purified gas reducing valve group control module PC-W2 and TRT stator blade/open soon variable valve group control module PC-101 is also respectively to raw gas reducing valve group 101, purified gas reducing valve group 201 and TRT stator blade/open the variable valve group soon to control.
Raw gas reducing valve group 101 comprises the raw gas reducing valve group first variable valve PV-W11, the raw gas reducing valve group second variable valve PV-W12, raw gas reducing valve group range valve PV-W13 and raw gas reducing valve group safety valve PV-W14 in parallel.Each valve of raw gas reducing valve group all is electrically connected with raw gas reducing valve group control module PC-W1.
Purified gas reducing valve group 201 comprises the purified gas reducing valve group first variable valve PV-W21, the purified gas reducing valve group second variable valve PV-W22, purified gas reducing valve group range valve PV-W23 and purified gas reducing valve group safety valve PV-W24 in parallel.Each valve of purified gas reducing valve group all is electrically connected with purified gas reducing valve group control module PC-W2.
The TRT system comprises compound expansion turbine 301 and brushless excitation generator 302, and TRT stator blade/open the variable valve group soon comprises that TRT stator blade PV-101, TRT cut valve PV-102 soon and TRT opens variable valve PV-103 soon; One of TRT stator blade PV-101 is connected to compound expansion turbine 301, the other end is electrically connected to TRT stator blade/open soon variable valve group control module PC-101, TRT cuts between the output terminal and compound expansion turbine 301 that valve PV-102 is connected to gas dry-method dust-removal device 401 soon, and TRT opens between the input terminus that variable valve PV-103 is connected to the output terminal of gas dry-method dust-removal device 401 and purified gas pipe network soon.Each valve of TRT stator blade/open soon variable valve group all with TRT stator blade/open variable valve group control module PC-101 soon to be electrically connected.
Be connected to raw gas butterfly valve V-W11 and raw gas push-pull valve V-W12 before the input terminus of raw gas reducing valve group 101; The input terminus of TRT system and output terminal are connected to TRT inlet butterfly valve V-W31, TRT inlet push-pull valve V-W32 and TRT exit butterfly valve V-W34, TRT outlet push-pull valve V-W33 respectively; Be connected to dish valve V-W22 after purified gas reducing valve group back card/back board valve V-W21 and the purified gas reducing valve group between the output terminal of purified gas reducing valve group 201 and the input terminus of purified gas pipe network.
The top pressure control method of this dry method dust-removal system is: furnace top pressure control is respectively by TRT stator blade/open variable valve group, TRT system soon, or raw gas reducing valve group 101, coal gas diffusion tower T-1, or purified gas reducing valve group 201, purified gas pipe network are carried out.Present method comprises that also (1) furnace top pressure control is at TRT stator blade/open the soon automatic switching procedure of variable valve group to purified gas reducing valve group 201; (2) TRT stator blade/open the soon automatic switching procedure of variable valve group to raw gas reducing valve group 101; (3) purified gas reducing valve group 201 is to TRT stator blade/open the soon automatic switching procedure of variable valve group; (4) purified gas reducing valve group 201 is to the automatic switching procedure of raw gas reducing valve group 101; (5) raw gas reducing valve group 101 is to the automatic switching procedure of purified gas reducing valve group 201; (6) raw gas reducing valve group 101 is to TRT stator blade/open the soon automatic switching procedure of variable valve group.
Raw gas reducing valve group control module PC-W1, purified gas reducing valve group control module PC-W2, TRT stator blade/open soon are provided with branch journey PID (ratio, integration, differential) setter on the variable valve group control module PC-101, or add the PID setter of feedforward.Switching process between each control module is controlled by process control module separately respectively: the furnace top pressure set(ting)value SP that sets each PID setter respectively, the furnace top pressure value that arrives when the PID of certain control module regulator feedback is controlled its corresponding valve by this control module and is brought into operation during more than or equal to its furnace top pressure set(ting)value SP.
The process of above-mentioned six kinds of automatic switchovers is: at first, in blast furnace production process, the section chief sets furnace top pressure set(ting)value SP.Before preparing to carry out valve and automaticallying switch, regulating the system of furnace top pressure, the furnace top pressure of the PID setter that it is corresponding is set at SP, and etc. the furnace top pressure set(ting)value of PID setter of to be switched system be set at SP+ Δ P, and Δ P＞0.After the system of working finishes the furnace top pressure adjusting, then carry out system and switch, send the SP value to treat work system PID setter earlier, SP+ Δ P value is sent to the PID setter of former work system.When former roof pressure adjusting performer is closed fully, just finish cutting of adjusting furnace top pressure control and changeed.
Above-mentioned six kinds of trigger conditions of but changing process automatically are as follows:
(1) TRT stator blade/open the variable valve group soon to the trigger condition of purified gas reducing valve group 201 automatic switching procedures is: TRT system run duration, the TRT system breaks down or coal gas when not meeting the power generation conditions of TRT system.
(2) TRT stator blade/open the variable valve group soon to the trigger condition of raw gas reducing valve group 101 automatic switching procedures is: TRT system run duration, because of the reason of gas temperature, sack cleaner (gas dry-method dust-removal device 401) is in the time of can't receiving coal gas.
(3) purified gas reducing valve group 201 to the trigger condition of TRT stator blade/open soon variable valve group automatic switching procedure is: purified gas reducing valve group 201 run durations, and during TRT system recovery power generation conditions.
(4) purified gas reducing valve group 201 to the trigger condition of raw gas reducing valve group 101 automatic switching procedures is: purified gas reducing valve group 201 run durations, and because of the reason of gas temperature, when sack cleaner can't receive coal gas.
(5) raw gas reducing valve group 101 to the trigger condition of purified gas reducing valve group 201 automatic switching procedures is: raw gas reducing valve group 101 run durations, sack cleaner recover to receive the condition of coal gas, and the TRT system is not when possessing power generation conditions.
(6) raw gas reducing valve group 101 to the trigger condition of TRT stator blade/open soon variable valve group automatic switching procedure is: raw gas reducing valve group 101 run durations, sack cleaner recovers to receive the condition of coal gas, and the TRT system is when possessing power generation conditions.
Set forth the handoff procedure of furnace top pressure below in conjunction with accompanying drawing.
As shown in Figure 1: the first variable valve PV-W21 of the first variable valve PV-W11 of the raw gas reducing valve group of raw gas reducing valve group, the second variable valve PV-W12 and purified gas reducing valve group, the second variable valve PV-W22 equally are respectively a minor adjustment valve and a big variable valve, adopt branch journey PID to regulate the mode that adds feedforward and carry out.When roof pressure lower, the coal gas amount hour, the raw gas reducing valve group first variable valve PV-W11 (or purified gas reducing valve group first variable valve PV-W21) minor adjustment valve is regulated, when roof pressure higher, regulate with the big variable valve of the raw gas reducing valve group second variable valve PV-W12 (or purified gas reducing valve group second variable valve PV-W22) when the coal gas amount is big, each valve group can be regarded a performer respectively as, adds TRT stator blade/open soon variable valve group and constitutes 3 performer and regulate roof pressure.
This roof pressure control method is to utilize PLC (programmable logic controller) system to realize mutual switching between the performer, is generally finished the control of total system by two covers or three cover PLC, describes in detail with regard to automatic switching procedure below:
1.TRT stator blade/opening the variable valve group soon switches to purified gas reducing valve group 201: TRT system run duration, the furnace top pressure set(ting)value that TRT stator blade PV-101/TRT opens variable valve PV-103 correspondence soon is set at SP, the furnace top pressure set(ting)value of purified gas reducing valve group 201 correspondences is set at SP+ Δ P, electronic push-pull valve V-W21 and butterfly valve V-W22 after the purified gas reducing valve group 201 are in the state of opening, purified gas reducing valve group 201 is in auto state (because of set(ting)value is SP+ Δ P, purified gas reducing valve group 201 is in the closed position).The PLC of purified gas reducing valve group control module PV-W2 receives the signal of requesting stop of TRT system fault signal or TRT system; just the SP value is sent purified gas reducing valve group control module PV-W2; send the TRT stator blade of TRT stator blade PV-101 correspondence/open soon variable valve group control module PC-101 with SP+ Δ P value; at this moment roof pressure is transformed into purified gas reducing valve group 201 control gradually and closes fully up to TRT stator blade PV-101; at this moment; the TRT system can shut down with grid disconnection; also can allow its electric motor out of service, convert.
2.TRT stator blade/opening the variable valve group soon switches to raw gas reducing valve group 101: TRT system run duration; PLC judges that gas temperature is higher or lower than the temperature that sack cleaner is set; the PLC system sends instructions automatically and lights coal gas diffusion tower T-1; open butterfly valve V-W11 and push-pull valve V-W12 before the raw gas reducing valve group 101; send raw gas reducing valve group control module PC-W1 with the SP value; SP+ Δ P value is sent the TRT stator blade of TRT stator blade PV-101 correspondence/open soon variable valve group control module PC-101; at this moment roof pressure is transformed into raw gas reducing valve group 101 control gradually and closes fully up to TRT stator blade PV-101; at this moment; the TRT system can shut down with grid disconnection; also can allow its electric motor out of service, convert.
3. purified gas reducing valve group 201 is to the TRT stator blade/opening the variable valve group soon switches: the blast furnace roof pressure is by purified gas reducing valve group 201 conditioning periods, TRT operator send the request initiating signal, after the section chief really appoints, the TRT system enters raising speed, throw excitation, be incorporated into the power networks after, send the TRT stator blade of TRT stator blade PV-101 correspondence/open soon variable valve group control module PC-101 with the SP value, SP+ Δ P value is sent purified gas reducing valve group control module PC-W2, closes fully up to purified gas reducing valve group 201, converts.
4. purified gas reducing valve group 201 is switched to raw gas reducing valve group 101: PLC judges that gas temperature is higher or lower than the temperature that sack cleaner is set, the PLC system sends instructions automatically and lights coal gas diffusion tower T-1 coke-oven gas, and open butterfly valve V-W11 and push-pull valve V-W12 before the raw gas reducing valve group 101, send raw gas reducing valve group control module PC-W1 with the SP value, SP+ Δ P value is sent purified gas reducing valve group control module PC-W2, at this moment roof pressure is transformed into 101 controls of raw gas reducing valve group gradually, close fully up to purified gas reducing valve group 201, convert.
5. raw gas reducing valve group 101 is switched to purified gas reducing valve group 201: PLC judges that gas temperature meets sack cleaner and receives the temperature of gas requirement, send instructions and open the sack cleaner casing and go into the outbound valve, and electronic push-pull valve V-W21 and butterfly valve V-W22 after the clean coal air valve group, send purified gas reducing valve group control module PC-W2 with the SP value, SP+ Δ P value is sent raw gas reducing valve group control module PC-W1, close fully up to raw gas reducing valve group 101, close electric butterfly valve V-W11 and push-pull valve V-W12 before coal gas diffusion tower T-1 coke-oven gas and the raw gas reducing valve group 101, convert.
6. raw gas reducing valve group 101 is to the TRT stator blade/opening the variable valve group soon switches: PLC judges that gas temperature meets sack cleaner and receives the temperature of gas requirement, and TRT operator have sent the request initiating signal, after the section chief really appoints, the TRT system enters raising speed, throw excitation, after being incorporated into the power networks, send the TRT stator blade of TRT stator blade PV-101 correspondence/open soon variable valve group control module PC-101 with the SP value, SP+ Δ P value is sent raw gas reducing valve group control module PC-W1, close fully up to raw gas reducing valve group 101, close electric butterfly valve V-W11 and push-pull valve V-W12 before coal gas diffusion tower T-1 coke-oven gas and the raw gas reducing valve group 101, convert.
This control method can utilize the PLC technology to realize the smooth conversion of automatic roof pressure control, has improved automatization level, has avoided the coordination problem of operating post; The key of control method be exactly SP value and SP+ Δ P value between the setter of three performer mutual transmission and the opportunity of transmission.
In a word, above-mentioned six kinds of automatic switchovers, be exactly the process of six kinds of exchange furnace top pressure controls in fact, in blast furnace production process, the furnace top pressure set(ting)value is set by blast furnace man's progress row, and each performer all is to carry out single PID or be with the PID of feed forward function to control automatically according to the furnace top pressure set(ting)value; Before preparing to carry out the performer switching, two performer all are in the process of automatic adjusting roof pressure, just the roof pressure set(ting)value is different, regulating the performer of roof pressure, corresponding PID setter (being called " operation regulator "), the set(ting)value that obtains is exactly the roof pressure value (being called " SP ") that the section chief sets, and the PID setter of performer to be converted (being called " treating operation regulator "), the furnace top pressure set(ting)value that obtains is the roof pressure value of setting greater than the section chief (being called " SP+ Δ P "), at this moment, regulate the work of roof pressure and finish, treat operation regulator by operation regulator, because of the furnace top pressure set(ting)value is big, and make performer to be converted be in the position of closing; When conversion, the SP value given treat operation regulator, the SP+ Δ P send former operation regulator, at this moment, the work performer can be closed gradually, and performer to be converted can be opened gradually, close fully up to former work performer, conversion has just taken place in the control of regulating roof pressure, and conversion has also just taken place the function of two performer (setter that comprises them), and switching process is finished.
Further describe the utility model below in conjunction with embodiment.
One. the furnace top pressure control by the step that raw gas reducing valve group 101 switches to purified gas reducing valve group 201 is:
1) treats that the sack cleaner bleed finishes, after the explosion experiment is qualified, enter next step;
2) from automaticallying switch, selecting the semi-automatic switching: if select automatic switching mode, and the temperature that temperature sensor TE-W01 measures before the cloth bag enters next step automatic switchover between 120 ℃～260 ℃ the time; If select semi-automatic switching mode, the then semi-automatic cloth bag that switches to reclaims status button, enters next step semi-automatic switching then;
3) according to preceding step choice relation, by automatic or automanual mode with raw gas butterfly valve V-W11, raw gas push-pull valve V-W12, purified gas reducing valve group back card/back board valve V-W21, purified gas reducing valve group after butterfly valve V-W22, first, second variable valve of purified gas reducing valve group PV-W21/W22 be transformed into auto state;
4) purified gas reducing valve group back card/back board valve V-W21 is opened automatically, opening puts in place laggardly goes into next step;
5) butterfly valve V-W22 after the purified gas reducing valve group is opened automatically, opening puts in place laggardly goes into next step;
6) dry cloth bag is entered the mouth Pneumatic butterfly valve triad are opened timed interval 5s between group automatically; Open and enter next step after finishing;
7) furnace top pressure set(ting)value SP is delivered to purified gas reducing valve group control module PC-W2, furnace top pressure value SP+5KP delivers to raw gas reducing valve group control module PC-W1, and raw gas reducing valve group 101 and purified gas reducing valve group 201 all are in the state of automatic adjusting roof pressure simultaneously;
8) raw gas reducing valve group 101 is closed its first, second variable valve PV-W11/W12 automatically, and purified gas reducing valve group is opened its first, second variable valve PV-W21/W22 automatically and regulated roof pressure; The aperture of first, second variable valve of raw gas reducing valve group PV-W11/W12 enters next step after 5%;
9) the reducing valve group is switched and to be finished, and closes raw gas butterfly valve V-W11, and closing puts in place laggardly goes into next step;
10) close raw gas push-pull valve V-W12 (also can be not related to), closing puts in place laggardly goes into next step;
11) diffuse tower T-1 to coal gas and send out signal flame-out, diffuse the tower ignition controller and automatically perform flame-out program;
12) treat that coal gas diffusion tower T-1 is flame-out after, blast furnace gas is promptly finished by diffusing the switching of reclaiming.
Two. the furnace top pressure control is as follows by the step that purified gas reducing valve group 201 switches to raw gas reducing valve group 101:
1) treats that the sack cleaner bleed finishes, after the coal gas stand the test, enter next step;
2) from automaticallying switch, selecting the semi-automatic switching: if select automatic switching mode, and the temperature that temperature sensor TE-W01 measures before the cloth bag enters next step automatic switchover between 120 ℃～260 ℃ the time; If select semi-automatic switching mode, then semi-automatic switching to diffused status button, enters next step semi-automatic switching then;
3) according to preceding step choice relation, by automatic or automanual mode with raw gas butterfly valve V-W11, raw gas push-pull valve V-W12, purified gas reducing valve group back card/back board valve V-W21, purified gas reducing valve group after butterfly valve V-W22, first, second variable valve of raw gas reducing valve group PV-W11/W12 be transformed into auto state;
4) diffuse tower T-1 to coal gas and send out ignition signal, diffuse the tower ignition controller and automatically perform ignition procedure, enter next step after igniting is finished;
5) raw gas push-pull valve V-W12 is opened automatically, opening puts in place laggardly goes into next step;
6) raw gas butterfly valve V-W11 is opened automatically, opening puts in place laggardly goes into next step;
7) furnace top pressure set(ting)value SP is delivered to raw gas reducing valve group control module PC-W1, furnace top pressure value SP+5KP delivers to purified gas reducing valve group control module PC-W2, and raw gas reducing valve group 101 and purified gas reducing valve group 201 all are in the state of automatic adjusting roof pressure simultaneously;
8) purified gas reducing valve group 201 is closed its first, second variable valve PV-W21/W22 automatically, and raw gas reducing valve group 101 is opened its first, second variable valve PV-W11/W12 automatically and regulated roof pressure; The aperture for the treatment of first, second variable valve of purified gas reducing valve group PV-W21/W22 entered next step less than 5% o'clock;
9) the reducing valve group is switched and to be finished, and closes butterfly valve V-W22 after the purified gas reducing valve group, and closing puts in place laggardly goes into next step;
10) dry cloth bag is entered the mouth Pneumatic butterfly valve triad are closed timed interval 5s between group automatically; Close and enter next step after finishing;
11) blast furnace gas is promptly finished by being recovered to the switching of diffusing.
Three. the furnace top pressure control is as follows by the step that purified gas reducing valve group 201 switches to TRT stator blade/open soon variable valve group:
1) the cloth bag bleed is finished, and after the explosion experiment is qualified, regulates by carry out furnace top pressure through coal gas compression release valve group 201, enters handoff procedure then;
2) the TRT system sends the input signal, and blast furnace system enters next step if confirm and can drop into;
3) TRT is entered the mouth butterfly valve V-W31, TRT inlet push-pull valve V-W32, TRT outlet push-pull valve V-W33, TRT exit butterfly valve V-W34, TRT stator blade/open the variable valve group soon to be transformed into auto state;
4) opening TRT outlet push-pull valve V-W33, TRT inlet push-pull valve V-W32, TRT exit butterfly valve V-W34 successively, must be just can open next valve behind the last valve open; The butterfly valve V-W31 that then TRT entered the mouth opens a suitable aperture; After treating that all valve opens finish, enter next step;
5) open TRT and cut valve PV-102 soon, treat that it opens to put in place and laggardly go into next step;
6) slowly open TRT stator blade PV-101, the TRT system begins raising speed, and rotating speed enters next step to 1200r/min;
7) check that whether the TRT system exists abnormal conditions, enters next step as if no abnormal;
8) the TRT system enters the section of rising suddenly, and avoids resonance region, treats that its rotating speed enters next step to 2700r/min;
9) the TRT system enters excitation and prepares section, sends signal and throws excitation, treats that carrying out automatic sub-synchronous device after it boosts puts into operation;
10) the TRT system enters to be incorporated into the power networks and prepares section, standard-sized sheet TRT inlet butterfly valve V-W31, treat that its brushless excitation generator 302 is incorporated into the power networks after, send the TRT system and drop into signal;
11) after brushless excitation generator 302 generates electricity by way of merging two or more grid systems, furnace top pressure value SP+5Kpa is sent to purified gas reducing valve group control module PC-W2, PV-W21/W22 closes by its first, second variable valve of control purified gas reducing valve group, and roof pressure set(ting)value SP then delivers to TRT stator blade/open soon variable valve group control module PC-101; Treat first, second variable valve of purified gas reducing valve group PV-W21/W22 close put in place after, enter next step;
12) TRT stator blade/open the variable valve group soon to obtain the furnace top pressure control, at this time purified gas reducing valve group 201 also is in auto state.
Four, the furnace top pressure control is as follows by the switch process that TRT stator blade/open soon variable valve group switches to purified gas reducing valve group 201:
1) is divided into two kinds of situations,, then enters next step if emergency situatioies such as driving, interlock protection appear in the TRT system; If when damping down or working of a furnace shakiness are received by the TRT system, then enter 8);
2) the TRT system begins to enter the emergency stop process, enters next step then;
3) the TRT system sends signal and makes brushless excitation generator 302 and grid disconnection, TRT cuts valve PV-102 emergency switching-off within 1 second soon simultaneously, TRT open soon variable valve PV-103 by the certain multiple of former TRT stator blade PV-101 aperture relation (as 1.5 times, can be according to producer's data modification) to open and enter automatic adjusting, the TRT system drops into signal and resets; After treating that all valve events put in place, enter next step;
4) furnace top pressure set(ting)value SP is delivered to purified gas reducing valve group control module PC-W2, PV-W21/W22 opens by its first, second variable valve of control purified gas reducing valve group; Furnace top pressure value SP+5KPa is delivered to TRT stator blade/open soon variable valve group control module PC-101, open variable valve PV-103 soon by its control TRT and close; Treat TRT open soon variable valve PV-103 close put in place after, enter next step;
5) TRT is entered the mouth butterfly valve V-W31, TRT exit butterfly valve V-W34 closes automatically, treat they close put in place after, enter next step;
6) TRT is entered the mouth push-pull valve V-W32, TRT outlet push-pull valve V-W33 closes automatically, treats that they close to put in place laggardly to go into next step;
7) TRT system emergency stop is finished, and is in stopped status, regulates roof pressure by first, second variable valve of purified gas reducing valve group PV-W21/W22; Enter 14 then);
8) the TRT system receives that damping down or working of a furnace shakiness, furnace top pressure cross situations such as low, then enters the orderly closedown process;
9) furnace top pressure set(ting)value SP is delivered to purified gas reducing valve group control module PC-W2, PV-W21/W22 opens by its first, second variable valve of control purified gas reducing valve group, and furnace top pressure value SP+5KPa is delivered to TRT stator blade/open soon variable valve group control module PC-101; The generated output for the treatment of the TRT system constantly reduce to reach with electrical network require separate train value the time, enter next step;
10) separate column signal through artificial sending after confirming, with brushless excitation generator 302 and grid disconnection; Treat that brushless excitation generator 302 off-the-lines finish, and TRT stator blade PV-101 close put in place after, enter next step;
11) close TRT and cut valve PV-102 soon, treat that it closes to put in place and laggardly go into next step;
12) furnace top pressure begins to be regulated by first, second variable valve of purified gas reducing valve group PV-W21/W22; Treat TRT open soon variable valve PV-103 close put in place after, enter next step;
13) TRT system orderly closedown is finished, and it is in stopped status, is regulated by first, second variable valve of purified gas reducing valve group PV-W21/W22 fully by furnace top pressure, enters next step then;
14) the furnace top pressure control is all finished by the process that TRT stator blade/open soon variable valve group switches to purified gas reducing valve group 201.
Five. the furnace top pressure control is as follows by the control process that raw gas reducing valve group 101 switches to TRT stator blade/open soon variable valve group:
1) the TRT system sends the input request signal, and blast furnace is confirmed and can be dropped into;
2) select automatic and automanual conversion regime,, enter next step automatic switchover if when selecting automatic conversion regime and the preceding temperature sensor TE-W01 of cloth bag to record temperature to be between 120 ℃～260 ℃; If select the then semi-automatic recovery status button that is transformed into of semi-automatic conversion regime, enter next step semi-automatic switching then;
3) by automatic or automanual mode with TRT enter the mouth butterfly valve V-W31, TRT inlet push-pull valve V-W32, TRT outlet push-pull valve V-W33, TRT exit butterfly valve V-W34 and TRT stator blade/open the variable valve group soon to be transformed into auto state, purified gas reducing valve group 201 is transformed into manual state;
4) judge that the TRT system drops into signal and whether puts 1, if, enter next step for not; If for being to go to 13);
5) TRT is exported push-pull valve V-W33, TRT inlet push-pull valve V-W32, TRT exit butterfly valve V-W34 opens successively, must be just can open next valve behind the last valve open; The butterfly valve V-W31 that then TRT entered the mouth opens a suitable aperture; Treat to enter next step after all valve opens finish;
6) dry cloth bag is entered the mouth Pneumatic butterfly valve triad are opened timed interval 5s between group automatically; Treating that they are opened enters next step after finishing;
7) open TRT and cut valve PV-102 soon, treat that it opens to put in place and laggardly go into next step;
8) slowly open TRT stator blade PV-101, the TRT system begins raising speed, enters next step to 1200r/min;
9) check that whether the TRT system exists abnormal conditions, then enters next step as if no abnormal;
10) the TRT system enters the section of rising suddenly, and avoids resonance region, treats to enter next step after its rotating speed is raised to 2700r/min;
11) the TRT system enters excitation and prepares section, sends signal and throws excitation, treats that carrying out automatic sub-synchronous device after it boosts puts into operation;
12) the TRT system enters to be incorporated into the power networks and prepares section, standard-sized sheet TRT inlet butterfly valve V-W31, treat that brushless excitation generator 302 is incorporated into the power networks after, clash TRT and drop into signal;
13) furnace top pressure value SP+5KPa is delivered to raw gas reducing valve group control module PC-W1, PV-W11/W12 closes by its first, second variable valve of control raw gas reducing valve group, and furnace top pressure set(ting)value SP is delivered to TRT stator blade/open soon variable valve group control module PC-101; Treat first, second variable valve of raw gas reducing valve group PV-W11/W12 close put in place after, enter next step;
14) the reducing valve group is transformed into TRT stator blade/open soon variable valve group and regulates roof pressure and finish, and closes raw gas butterfly valve V-W11; Treat raw gas butterfly valve V-W11 close put in place after, enter next step;
15) close raw gas push-pull valve V-W12, treat that it closes to put in place and laggardly go into next step;
16) diffuse tower T-1 to coal gas and send out signal flame-out, diffuse the tower ignition controller and automatically perform flame-out program; After treating that coal gas diffusion tower T-1 is flame-out, enter next step;
17) first, second variable valve of purified gas reducing valve group PV-W21/W22 is set to auto state, and first, second variable valve of raw gas reducing valve group PV-W11/W12 puts manually, and furnace top pressure value SP+5KPa is delivered to purified gas reducing valve group control module PC-W2;
18) TRT system input converts, and purified gas reducing valve group 201 also is in auto state.
Six. the furnace top pressure control is as follows by the step that TRT stator blade/open soon variable valve group is converted to raw gas reducing valve group 101:
1) select to automatically switch or semi-automatic conversion regime,, enter next step automatic switchover then if when selecting temperature sensor TE-W01 records before automatic conversion regime and the cloth bag temperature between 120 ℃～260 ℃; If select then semi-automatic being transformed into of semi-automatic conversion regime to diffuse status button, enter next step semi-automatic switching then;
2) by automatic or automanual mode, diffuse tower T-1 to coal gas and send out ignition signal, diffuse the tower ignition controller and automatically perform ignition procedure; After treating that coal gas diffusion tower T-1 igniting is finished, enter next step;
3) open raw gas push-pull valve V-W12 automatically, treat that it opens to put in place and laggardly go into next step;
4) open raw gas butterfly valve V-W11 automatically, treat that it opens to put in place and laggardly go into next step;
5) furnace top pressure set(ting)value SP is delivered to raw gas reducing valve group control module PC-W1, PV-W11/W12 opens by its first, second variable valve of control raw gas reducing valve group; Send TRT stator blade/open soon variable valve group control module PC-101 with furnace top pressure value SP+5KPa; The generated output for the treatment of brushless excitation generator 302 constantly reduce to reach with electrical network require separate train value the time, enter next step;
6) separate column signal, brushless excitation generator 302 and grid disconnection through artificial sending after confirming; Treat that off-the-line puts in place and TRT stator blade PV-101 close put in place after, enter next step;
7) close TRT and cut valve PV-102 soon, treat that it closes to put in place and laggardly go into next step;
8) dry cloth bag is entered the mouth Pneumatic butterfly valve triad are closed timed interval 5s between group automatically; Treat dry cloth bag inlet Pneumatic butterfly valve close finish after, enter next step;
9) blast furnace gas is finished by being recovered to diffuse to switch.
Claims (5)
1. adopt the blast furnace top pressure control system of gas dry-method dust-removal device, comprise coal gas diffusion tower, gas dry-method dust-removal device, purified gas pipe network and TRT system, it is characterized in that:
It also comprises raw gas reducing valve group, purified gas reducing valve group and TRT stator blade/open the variable valve group soon, and controls raw gas reducing valve group control module, purified gas reducing valve group control module and the TRT stator blade of these three kinds of valve groups/open soon variable valve group control module respectively;
The blast furnace gas inlet duct is divided into two-way, leads up to the winding of raw gas reducing valve to the coal gas diffusion tower; Another road is connected to gas dry-method dust-removal device, and then is divided into two-way, leads up to purified gas reducing valve group, and another road is connected to purified gas pipe network inlet by TRT stator blade/open the variable valve group soon to enter the TRT system after this two-way converges;
Raw gas reducing valve group control module, purified gas reducing valve group control module and TRT stator blade/open soon between the variable valve group control module are interconnected, and are connected to the inlet duct of blast furnace gas by temperature sensor, the first gas pressure transmitter, the second gas pressure transmitter before the cloth bag; Raw gas reducing valve group control module, purified gas reducing valve group control module and TRT stator blade/open soon variable valve group control module also is connected to raw gas reducing valve group, purified gas reducing valve group and TRT stator blade/open soon variable valve group respectively.
2. Controlling System according to claim 1 is characterized in that: raw gas reducing valve group comprises raw gas reducing valve group first variable valve, raw gas reducing valve group second variable valve, raw gas reducing valve group range valve and raw gas reducing valve group safety valve in parallel.
3. Controlling System according to claim 1 is characterized in that: purified gas reducing valve group comprises purified gas reducing valve group first variable valve, purified gas reducing valve group second variable valve, purified gas reducing valve group range valve and purified gas reducing valve group safety valve in parallel.
4. Controlling System according to claim 1 is characterized in that: the TRT system comprises compound expansion turbine and brushless excitation generator, and TRT stator blade/open the variable valve group soon comprises that TRT stator blade, TRT cut valve soon and TRT drives variable valve soon; One of TRT stator blade is connected to the compound expansion turbine, the other end is connected to TRT stator blade/open soon variable valve group control module, TRT cuts between the output terminal and compound expansion turbine that valve is connected to gas dry-method dust-removal device soon, and TRT opens between the input terminus that variable valve is connected to the output terminal of gas dry-method dust-removal device and purified gas pipe network soon.
5. according to each described Controlling System in the claim 1～4, it is characterized in that: be connected to raw gas butterfly valve and raw gas push-pull valve before the input terminus of raw gas reducing valve group; The input terminus of TRT system and output terminal are connected to TRT inlet butterfly valve, TRT inlet push-pull valve and TRT exit butterfly valve, TRT respectively and export push-pull valve; Be connected to dish valve after purified gas reducing valve group back card/back board valve and the purified gas reducing valve group between the output terminal of purified gas reducing valve group and the input terminus of purified gas pipe network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202349404U CN201857398U (en) | 2009-12-30 | 2010-06-09 | Blast furnace top pressure control system adopting coal gas dry method dust remover |
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920269166 | 2009-12-30 | ||
| CN200910266706A CN101768648A (en) | 2009-12-30 | 2009-12-30 | Blast furnace top pressure control system adopting gas dry-method dust-removal device |
| CN200910266706.1 | 2009-12-30 | ||
| CN200920269166.8 | 2009-12-30 | ||
| CN200910273505.4 | 2009-12-31 | ||
| CN200910273505A CN101760573A (en) | 2009-12-31 | 2009-12-31 | Method for controlling pressure of blast furnace top by adopting gas dry dust removing device |
| CN2010202349404U CN201857398U (en) | 2009-12-30 | 2010-06-09 | Blast furnace top pressure control system adopting coal gas dry method dust remover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201857398U true CN201857398U (en) | 2011-06-08 |
Family
ID=42996111
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102059196A Active CN101871027B (en) | 2009-12-30 | 2010-06-09 | Blast furnace top pressure control method adopting gas dry method dust-removing device |
| CN2010202349404U Expired - Fee Related CN201857398U (en) | 2009-12-30 | 2010-06-09 | Blast furnace top pressure control system adopting coal gas dry method dust remover |
| CN2010102059798A Expired - Fee Related CN101871028B (en) | 2009-12-30 | 2010-06-09 | Blast furnace top pressure control system adopting gas dry method dust-removing device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102059196A Active CN101871027B (en) | 2009-12-30 | 2010-06-09 | Blast furnace top pressure control method adopting gas dry method dust-removing device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102059798A Expired - Fee Related CN101871028B (en) | 2009-12-30 | 2010-06-09 | Blast furnace top pressure control system adopting gas dry method dust-removing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN101871027B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559964A (en) * | 2012-02-10 | 2012-07-11 | 中冶南方工程技术有限公司 | Feedforward control method of furnace top pressure of blast furnace |
| CN104462791B (en) * | 2014-11-24 | 2018-03-13 | 中冶南方工程技术有限公司 | A kind of method that determination TRT jerk emergency pressure reducing valve groups promptly calculate angle |
| CN104561412B (en) * | 2014-12-01 | 2016-09-21 | 中冶南方(武汉)重工制造有限公司 | The top pressure control method of bivalve reducer unit |
| CN112094971A (en) * | 2019-06-17 | 2020-12-18 | 宝钢集团新疆八一钢铁有限公司 | Four-valve-bank control optimization method for blast furnace |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4180249A (en) * | 1975-03-27 | 1979-12-25 | Agranovskaya Miriam A | Installation for controlling pressure of gas under shaft top in super-capacity blast furnace |
| US4067557A (en) * | 1976-07-02 | 1978-01-10 | Kawasaki Jukogyo Kabushiki Kaisha | System for changing over of blast furnace top pressure control |
| JPS5948290B2 (en) * | 1979-05-18 | 1984-11-26 | 日立造船株式会社 | Blast furnace top pressure power recovery method using dry dust remover |
| CN1175177C (en) * | 2001-04-03 | 2004-11-10 | 武汉钢铁设计研究总院 | Turbine generating process for one machine to recover waste gas energy from several blast furnaces |
| CN1216155C (en) * | 2003-10-10 | 2005-08-24 | 陕西鼓风机（集团）有限公司 | Automatic control method of blast-furnace top pressure stability for blast-furnace gas top pressure power generation apparatus |
| CN100365135C (en) * | 2005-04-13 | 2008-01-30 | 浙江大学 | Furnance top pressure control method based on resistance coefficient equivalent |
| CN100588720C (en) * | 2006-01-01 | 2010-02-10 | 广东韶钢松山股份有限公司 | Gas totally-drying purifying dust-collecting process of blast-furnace |
| JP2007254769A (en) * | 2006-03-20 | 2007-10-04 | Jfe Steel Kk | Method for controlling pressure of blast furnace gas and device therefor |
-
2010
- 2010-06-09 CN CN2010102059196A patent/CN101871027B/en active Active
- 2010-06-09 CN CN2010202349404U patent/CN201857398U/en not_active Expired - Fee Related
- 2010-06-09 CN CN2010102059798A patent/CN101871028B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101871027A (en) | 2010-10-27 |
| CN101871028B (en) | 2012-05-23 |
| CN101871028A (en) | 2010-10-27 |
| CN101871027B (en) | 2012-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101760573A (en) | Method for controlling pressure of blast furnace top by adopting gas dry dust removing device | |
| CN201857398U (en) | Blast furnace top pressure control system adopting coal gas dry method dust remover | |
| CN101768648A (en) | Blast furnace top pressure control system adopting gas dry-method dust-removal device | |
| CN102822451A (en) | Power generation plant facilities and method for operating same | |
| CN103509895A (en) | Method for controlling pressure of furnace top of blast furnace by combining TRT stationary blade and pressure reducing valve group | |
| CN201386106Y (en) | Blast furnace Bischoff system residual pressure energy recovery startup and control device | |
| CN105779684A (en) | Converter coal gas recycling system and recycling method thereof | |
| CN111486472A (en) | Medium-speed mill automatic start-stop control system suitable for deep peak shaving of direct-blowing coal-fired unit | |
| CN102409168A (en) | Joint driving unit for sintering waste heat recovery and sintering main exhaust fan | |
| CN206205996U (en) | A kind of gas stabilized-pressure energy recycle device for gas turbine front end | |
| CN106403626B (en) | Sintering waste heat recycling and the full-automatic activation system of Sinter air machine Unit erriger and method | |
| CN101792831B (en) | Automatic sweeping method for nitrogen replaced with gas in blast furnace gas energy recovery system pipe network | |
| US20150167500A1 (en) | Metallurgical plant | |
| CN201334491Y (en) | Blast furnace raw coke oven gas diffusing device | |
| CN201292370Y (en) | Blast furnace top pressure control rearrange apparatus | |
| CN102478232A (en) | Recycling method of heat energy of waste flue gas of coke oven | |
| CN202884999U (en) | Firewood waste fuel gas automatic generator furnace | |
| CN204918633U (en) | Blast furnace gas residual pressure control system that generates electricity | |
| CN101935722A (en) | Control method of bypass valve of energy recovery device during abnormal full close of stator blade | |
| CN101792833B (en) | Automatic sweeping method for nitrogen replaced with air in blast furnace gas energy recovery system pipe network | |
| CN205065745U (en) | Automatic ignition control system of diffusing of coke oven | |
| CN202430240U (en) | Automatic startup control system for differential pressure power generation | |
| CN101792834B (en) | Automatic sweeping method for gas replaced with nitrogen in blast furnace gas energy recovery system pipe network | |
| CN208894175U (en) | A kind of acetylene charging production system feeding control device | |
| CN102002544B (en) | Switching method for blast-furnace gas dry-wet dust removing systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20140609 |
|
| EXPY | Termination of patent right or utility model |