Gravity dedusting ash suction and discharge pipeline

By designing a gravity dust removal ash suction pipe including ash-removing ball valve, a nitrogen gas replenishment pipe, a pressure relief valve and a pressure gauge, the ash splashing problem caused by blockage during the blast furnace gravity dust removal process is solved, and the safety protection of operators and the stable operation of the pipeline is achieved.

CN222907955UActive Publication Date: 2025-05-27LINGYUAN IRON & STEEL CO LTD
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Patent Information

Application Number
CN202421590117.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-07-05
Publication Date
2025-05-27
Estimated Expiration
2034-07-05

AI Technical Summary

Technical Problem

During the gravity dust removal process of blast furnace, the suction and discharge truck is blocked by large ash blocks or the material tank is full, resulting in positive pressure accumulation. After forcibly disconnected, the dust removal ash is prone to splashing, causing damage to the operator.

Method used

A gravity dust removal ash suction pipe is designed, including a grey-removing ball valve, a nitrogen gas replenishment pipe, a pressure relief valve, a pressure gauge and a connecting hose that is connected in sequence. The pressure in the pipeline is monitored through the pressure gauge to avoid overpressure explosion, and to relieve pressure through the pressure relief valve under overpressure conditions to prevent the connection hose from being shaken and injuring people.

Benefits of technology

It effectively avoids the risk of ash splash caused by overpressure blockage, ensures the safety of the operator, and avoids the possibility of pipeline explosion through the design of the pressure relief valve.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN222907955U_ABST
    Figure CN222907955U_ABST
Patent Text Reader

Abstract

The utility model discloses a gravitational dedusting ash suction and discharge pipeline which comprises a first ash discharge ball valve, a second ash discharge ball valve, an intermediate tank and a third ash discharge ball valve which are connected in sequence, a three-branch pipeline, a first port of the three-branch pipeline is connected with the third ash discharge ball valve, and a second port of the three-branch pipeline is connected with the intermediate tank. A second opening of the three-branch pipeline is connected with a nitrogen supplementing pipe, a third opening of the three-branch pipeline is sequentially connected with a pressure release valve, a pressure gauge and a connecting hose, the nitrogen supplementing pipe is used for blowing ash entering the first opening out of the third opening, the connecting hose is used for being connected with a suction and exhaust vehicle, the pressure in the pipeline is monitored through the pressure gauge, and overpressure explosion is avoided; meanwhile, pressure is released through the pressure release valve during overpressure blockage, and the situation that the connecting hose swings to hurt people and objects when the connecting hose is directly disconnected for pressure release is avoided.
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Description

Technical Field

[0001] The utility model belongs to the technical field of dust removal ash discharging of dust collectors, and more specifically, relates to a gravity dust removal ash suction and discharge pipeline. Background Art

[0002] The gravity dust removal ash of blast furnaces is primary dust removal, and the temperature is usually 80 °C or higher. When the ash suction truck is sucking ash, when large ash blocks block the straight pipeline between the ash discharge ball valve and the hose or when the material tank of the ash suction truck is full, this part is under positive pressure after ash blocking. After forcibly disconnecting the connection, the dust removal ash is extremely easy to splash, and the operator is easily scalded. Therefore, it is necessary to improve the existing ash discharge pipeline to ensure the safety of personnel during blockage and pressure relief. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a gravity dust removal ash suction and discharge pipeline aiming at the deficiencies existing in the prior art, and solve the problems that when the existing ash suction truck is sucking ash, when large ash blocks block the straight pipeline between the ash discharge ball valve and the hose or when the material tank of the ash suction truck is full, this part is under positive pressure after ash blocking. After forcibly disconnecting the connection, the dust removal ash is extremely easy to splash, and the operator is easily scalded.

[0004] To achieve the above purpose, the utility model provides a gravity dust removal ash suction and discharge pipeline, including:

[0005] A first ash discharge ball valve, a second ash discharge ball valve, an intermediate tank and a third ash discharge ball valve connected in sequence, and the first ash discharge ball valve is used for connecting with a gravity dust collector;

[0006] A three-way pipeline, the first port of the three-way pipeline is connected with the third ash discharge ball valve, the second port of the three-way pipeline is connected with a nitrogen gas supply pipe, and the third port of the three-way pipeline is sequentially connected with a pressure relief valve, a pressure gauge and a connecting hose;

[0007] The nitrogen gas supply pipe is used for blowing the incoming ash at the first port out of the third port, and the connecting hose is used for connecting with an ash suction truck.

[0008] Optionally, the pressure relief valve is normally closed, and further includes:

[0009] A first electric drive opening and closing mechanism, which is arranged on the third ash discharge ball valve and is used for driving the third ash discharge ball valve to open and close;

[0010] A second electric drive opening and closing mechanism, which is arranged on the pressure relief valve and is used for driving the pressure relief valve to open and close. The second electric drive opening and closing mechanism is also provided with a delay module;

[0011] An early warning module, which is electrically connected with the first electric drive opening and closing mechanism and the delay module;

[0012] When overpressure occurs, first close the third ash discharge valve by the first electric drive opening and closing mechanism, and then open the pressure relief valve by the second electric drive opening and closing mechanism.

[0013] Optionally, a first straight pipe section is provided between the pressure gauge and the pressure relief valve.

[0014] Optionally, a second straight pipe section is provided between the pressure gauge and the connecting hose.

[0015] Optionally, a manhole is provided on the first straight pipe section, and the pressure relief valve is provided at least 1500 mm away from the manhole.

[0016] Optionally, the pressure gauge is provided at least 300 mm away from the manhole.

[0017] Optionally, the ash discharge valve is located on the side of the manhole away from the suction and discharge vehicle.

[0018] Optionally, the pressure gauge is located on the side of the manhole close to the suction and discharge vehicle.

[0019] Optionally, the volume of the intermediate tank is equal to the volume of the suction and discharge vehicle.

[0020] Optionally, multiple gravity dust removal ash suction and discharge pipes are connected in parallel to the gravity dust collector.

[0021] The present utility model provides a gravity dust removal ash suction and discharge pipe, and its beneficial effects are as follows:

[0022] The gravity dust removal ash suction and discharge pipe monitors the pressure inside the pipe through a pressure gauge to avoid overpressure explosion. At the same time, when overpressure blockage occurs, it relieves pressure through a pressure relief valve, avoiding the connection hose from swinging and hurting people and objects when directly disconnecting the connection hose to relieve pressure.

[0023] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By describing the exemplary embodiments of the present utility model in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present utility model will become more obvious. Among them, in the exemplary embodiments of the present utility model, the same reference numerals generally represent the same components.

[0025] Figure 1 The structural schematic diagram of the gravity dust removal ash suction and discharge pipe according to an embodiment of the present utility model is shown.

[0026] Description of the reference numerals:

[0027] 1. First ash discharge ball valve; 2. Second ash discharge ball valve; 3. Intermediate tank; 4. Third ash discharge ball valve; 5. Nitrogen make-up pipe; 6. Pressure relief valve; 7. Manhole; 8. Pressure gauge; 9. Suction and discharge vehicle. Detailed implementation manners

[0028] The preferred implementation manners of the present utility model will be described in more detail below. Although the preferred implementation manners of the present utility model are described below, it should be understood that the present utility model can be implemented in various forms and should not be limited by the implementation manners set forth herein. On the contrary, these implementation manners are provided to make the present utility model more thorough and complete, and to fully convey the scope of the present utility model to those skilled in the art.

[0029] As Figure 1 shown, a gravity dust removal ash suction and discharge pipeline includes:

[0030] The first ash discharge ball valve 1, the second ash discharge ball valve 2, the intermediate tank 3 and the third ash discharge ball valve 4 are connected in sequence. The first ash discharge ball valve 1 is used to connect with the gravity dust collector;

[0031] A three-way pipeline. The first port of the three-way pipeline is connected to the third ash discharge ball valve 4. The second port of the three-way pipeline is connected to the nitrogen make-up pipe 5. The third port of the three-way pipeline is sequentially connected with a pressure relief valve 6, a pressure gauge 8 and a connecting hose;

[0032] The nitrogen make-up pipe 5 is used to blow the incoming ash at the first port out of the third port. The connecting hose is used to connect with the suction and discharge vehicle 9.

[0033] Specifically, the pressure inside the pipeline is monitored by the pressure gauge 8 to avoid overpressure explosion. At the same time, when there is overpressure blockage, the pressure is relieved through the pressure relief valve 6 to avoid injury to people and objects caused by the swinging of the connecting hose when directly disconnecting the connecting hose to relieve pressure.

[0034] Furthermore, the alarm pressure value of the pressure gauge 8 is 0.15 Mpa.

[0035] In this embodiment, the pressure relief valve 6 is normally closed, and further includes:

[0036] A first electric drive opening and closing mechanism, which is arranged on the third ash discharge ball valve 4 and is used to drive the third ash discharge ball valve 4 to open and close;

[0037] A second electric drive opening and closing mechanism, which is arranged on the pressure relief valve 6 and is used to drive the pressure relief valve 6 to open and close. The second electric drive opening and closing mechanism is also provided with a delay module;

[0038] An early warning module, which is electrically connected to the first electric drive opening and closing mechanism and the delay module;

[0039] When there is overpressure, first make the first electric drive opening and closing mechanism close the third ash discharge valve, and then make the second electric drive opening and closing mechanism open the pressure relief valve 6.

[0040] Specifically, when the pressure gauge 8 detects overpressure, it emits an alarm signal to control the first electric drive opening and closing mechanism to close the third ash discharge valve, and the second electric drive opening and closing mechanism to open the pressure relief valve 6. The delay module ensures that the pressure relief valve 6 opens only after the third ash discharge ball valve 4 is closed.

[0041] Furthermore, the nitrogen gas supply pipe 5 can also be equipped with a valve to close synchronously with the third pressure relief valve 6.

[0042] In this embodiment, a first straight pipe section is provided between the pressure gauge 8 and the pressure relief valve 6.

[0043] Specifically, the straight pipe section rigidly bears the pressure increase caused by blockage. At the same time, the straight pipe section is equivalent to a stable space for storing the dust under pressure, providing a certain buffer margin to ensure the stability of the pressure relief valve 6 and the pressure gauge 8 during pressure relief and reducing vibration damage.

[0044] In this embodiment, a second straight pipe section is provided between the pressure gauge 8 and the connecting hose.

[0045] Specifically, the second straight pipe section is used to prevent the connecting hose from causing damage to the pressure gauge 8 due to fluctuations.

[0046] In this embodiment, a manhole 7 is provided on the first straight pipe section, and the pressure relief valve 6 is arranged at least 1500 mm away from the manhole 7.

[0047] Specifically, the manhole 7 facilitates the entry of personnel for maintenance, and maintaining an appropriate distance can avoid ash discharge interfering with the manhole 7.

[0048] In this embodiment, the pressure gauge 8 is arranged at least 300 mm away from the manhole 7.

[0049] Specifically, this can prevent air leakage and pressure relief at the manhole 7 from affecting the monitoring of the pressure gauge 8.

[0050] In this embodiment, the ash discharge valve is located on the side of the manhole 7 away from the suction and discharge vehicle 9.

[0051] Specifically, the ash discharge point is far from the connecting hose.

[0052] In this embodiment, the pressure gauge 8 is located on the side of the manhole 7 close to the suction and discharge vehicle 9.

[0053] Specifically, blockages are likely to occur at the connecting hose and the suction and discharge vehicle 9. By placing the pressure gauge 8 nearby for monitoring, the timeliness and accuracy of monitoring can be improved.

[0054] In this embodiment, the volume of the intermediate tank 3 is equal to the volume of the suction and discharge vehicle 9.

[0055] Specifically, one intermediate tank 3 corresponds to one suction and discharge vehicle 9, avoiding problems such as an empty vehicle or overload caused by a mismatch in the volumes of the intermediate tank 3 and the suction and discharge vehicle 9.

[0056] In this embodiment, multiple gravity dust removal ash suction and discharge pipes are connected in parallel to the gravity dust collector.

[0057] Specifically, multiple gravity dust removal ash suction and discharge pipes are connected in parallel to the gravity dust collector, and work independently of each other to improve the ash discharging effect of the gravity dust collector.

[0058] When the gravity dust removal ash suction and discharge pipe of this embodiment is in use, taking ash discharging as an example:

[0059] There are two parallel gravity dust removal ash suction and discharge pipes under the blast furnace gravity dust collector. Each gravity dust removal ash suction and discharge pipe respectively includes:

[0060] A first ash discharge ball valve 1, a second ash discharge ball valve 2, an intermediate tank 3 and a third ash discharge ball valve 4 connected in sequence;

[0061] A three-way pipeline. The first port of the three-way pipeline is connected to the third ash discharge ball valve 4. The second port of the three-way pipeline is connected to the nitrogen supply pipe 5. The third port of the three-way pipeline is connected with a first straight pipe section. A pressure relief valve 6, a manhole 7 and a pressure gauge 8 are sequentially arranged on the first straight pipe section. The pressure gauge 8 is connected to a connecting hose through a second straight pipe section;

[0062] A first electric drive opening and closing mechanism is arranged on the third ash discharge ball valve 4 and is used to drive the third ash discharge ball valve 4 to open and close;

[0063] A second electric drive opening and closing mechanism is arranged on the pressure relief valve 6 and is used to drive the pressure relief valve 6 to open and close. The second electric drive opening and closing mechanism is also provided with a delay module;

[0064] An early warning module, which is electrically connected to the first electric drive opening and closing mechanism and the delay module;

[0065] Step 1: Confirm whether the equipment, valves, pressure, etc. of the ash discharging system meet the ash discharging conditions. It is necessary to ensure that the first ash discharge ball valve 1, the second ash discharge ball valve 2 and the third ash discharge ball valve 4 are in a completely closed state.

[0066] Step 2: Open the second ash discharge ball valve 2. After the second ash discharge ball valve 2 is opened in place, then open the first ash discharge ball valve 1 to discharge ash into the intermediate tank 3 until the high-level indicator of the intermediate tank 3 sends a signal of full material, and then close the first ash discharge ball valve 1.

[0067] Step 3: Connect the hose to the suction and discharge vehicle 9, turn on the air pressure of the suction and discharge vehicle 9, open the third ash discharge ball valve 4 at the lower part of the intermediate tank 3, and then open the manual ball valve at the rear end of the suction and discharge vehicle 9 to form a fluidized state in the ash conveying pipeline, and the suction and discharge vehicle 9 starts to operate.

[0068] Step 4: Close the third ash discharge ball valve 4, close the manual ball valve at the rear end of the suction and discharge vehicle 9 device, and turn off the suction and discharge vehicle 9.

[0069] If the pressure gauge 8 detects overpressure during the ash discharge process, an alarm signal is issued. First, the first electric drive opening and closing mechanism is controlled to close the third ash discharge valve, and after the third ash discharge valve is closed through the delay module, the second electric drive opening and closing mechanism is then used to open the pressure relief valve 6.

[0070] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A gravity dust removal ash suction and discharge pipeline, characterized in that: include: A first ash discharge ball valve, a second ash discharge ball valve, an intermediate tank and a third ash discharge ball valve connected in sequence, wherein the first ash discharge ball valve is used to be connected to a gravity dust collector; A three-way pipeline, wherein the first port of the three-way pipeline is connected to the third ash unloading ball valve, the second port of the three-way pipeline is connected to the nitrogen gas supply pipe, and the third port of the three-way pipeline is connected to a pressure relief valve, a pressure gauge and a connecting hose in sequence; The nitrogen air supply pipe is used to blow the ash entering the first port out of the third port, and the connecting hose is used to connect with the suction and exhaust vehicle.

2. The gravity dust removal ash suction and discharge pipe according to claim 1 is characterized in that: The pressure relief valve is normally closed, and further comprises: a first electrically driven opening and closing mechanism, wherein the first electrically driven opening and closing mechanism is disposed on the third ash unloading ball valve and is used to drive the third ash unloading ball valve to open and close; A second electrically driven opening and closing mechanism, the second electrically driven opening and closing mechanism is arranged on the pressure relief valve, and is used to drive the pressure relief valve to open and close, and the second electrically driven opening and closing mechanism is also provided with a delay module; An early warning module, the early warning module is electrically connected to the first electrically driven opening and closing mechanism and the delay module; When overpressure occurs, the first electrically driven opening and closing mechanism is firstly used to close the third dust discharge ball valve, and then the second electrically driven opening and closing mechanism is used to open the pressure relief valve.

3. The gravity dust removal ash suction and exhaust pipe according to claim 1 is characterized in that: A first straight pipe section is arranged between the pressure gauge and the pressure relief valve.

4. The gravity dust removal ash suction and discharge pipe according to claim 1 is characterized in that: A second straight pipe section is arranged between the pressure gauge and the connecting hose.

5. The gravity dust removal ash suction and discharge pipe according to claim 3 is characterized in that: The first straight pipe section is provided with a manhole, and the pressure relief valve is arranged at least 1500 mm away from the manhole.

6. The gravity dust removal ash suction and discharge pipeline according to claim 5 is characterized in that: The pressure gauge is arranged at least 300 mm away from the manhole.

7. The gravity dust removal ash suction and discharge duct according to claim 5 is characterized in that: The pressure relief valve is located on the side of the manhole away from the suction and exhaust vehicle.

8. The gravity dust removal ash suction and discharge pipe according to claim 6 is characterized in that: The pressure gauge is located on the side of the manhole close to the suction and exhaust vehicle.

9. The gravity dust removal ash suction and discharge pipe according to claim 1 is characterized in that: The volume of the intermediate tank is equal to the volume of the suction and discharge vehicle.

10. The gravity dust removal ash suction and discharge pipe according to claim 1, characterized in that: A plurality of gravity dust collection ash suction and exhaust pipes are connected in parallel to the gravity dust collector.