Water treatment control system for RH refining furnace

Abstract

The utility model discloses a water treatment control system for a refining furnace, which comprises a hot well, a circulating water tank, a cooling tower, a filter, a filter backwashing water tank, a condenser, a high-pressure water pump, a gas storage tank and a programmable logic controller (PLC) cabinet, the cooling tower is connected with the circulating water tank through a pipeline, and a high-pressure water pump is arranged in the circulating water tank and connected with the condenser through a pipeline; according to the RH furnace water treatment monitoring system, the PLC control system is centralized, water treatment area information is comprehensively monitored, the temperature requirement of supplied cooling water is met through starting and stopping alarming of a valve and related equipment, the RH furnace water treatment monitoring system has the advantages of being high in integration degree, high in reliability, high in operability and the like, unattended operation is preliminarily achieved, and the RH furnace water treatment monitoring system plays a crucial role in stable operation of an RH furnace.

Description

Technical Field

[0001] The utility model belongs to the technical field of RH refining furnace supporting water treatment systems, and in particular relates to a refining furnace water treatment control system. Background Art

[0002] LF and RH refining are currently the primary methods for refining outside the furnace. LF furnaces offer excellent deoxidation and desulfurization during the steelmaking process, while RH is the most comprehensive and complex refining unit. RH vacuum refining furnaces are widely used in the production of high-strength, ultra-clean steel and are currently in widespread use in major steel mills. Their supporting water treatment system, consisting of a slurry water feed pump, a slurry water backwash pump, a submersible sewage pump, a fiberglass cooling tower, a double-cyclone filter, a complete dosing system, and an electric single-girder overhead crane, supplies cooling water for the RH furnace condenser and other equipment.

[0003] At present, the existing RH water treatment device areas are mostly observed manually in combination with on-site tables, which has great errors and information lags, and has certain hidden dangers to the stable operation of the RH refining furnace. Summary of the Invention

[0004] The purpose of the utility model is to provide a refining furnace water treatment control system to monitor and control the safe operation of the water treatment system to ensure the stable operation of the RH refining furnace.

[0005] The purpose of this utility model is achieved through the following technical means: a refining furnace water treatment control system, including a hot water well, a circulating water pool, a cooling tower, a filter, a filter backwash water pool, a condenser, a high-pressure water pump, a gas storage tank and a PLC cabinet,

[0006] A filtered water supply pipe is connected between the hot water well and the filter, a filtered water outlet pipe is connected between the filter and the cooling tower, the cooling tower is connected to the circulating water pool through a pipe, a high-pressure water pump is installed in the circulating water pool, and the high-pressure water pump is connected to the condenser through a pipe;

[0007] The air storage tank is connected to the filter through a first air intake pipe and a second air intake pipe;

[0008] A low-pressure water pump is also provided in the circulating water pool, which is connected to the filter through a backwash inlet pipe, and the filter is connected to the filter backwash pool through a backwash outlet pipe;

[0009] The high-pressure water pump is also connected to a high-pressure water pump valve, and the low-pressure water pump is connected to a low-pressure pump valve;

[0010] The high-pressure water pump, the high-pressure water pump valve, the low-pressure water pump and the low-pressure pump valve are all electrically connected to the PLC cabinet.

[0011] The filter is a double cyclone filter.

[0012] The air inlet of the double cyclone filter includes a straight air inlet and an oblique air inlet, the first air inlet pipe is connected to the straight air inlet, and the second air inlet pipe is connected to the oblique air inlet.

[0013] The filter water supply pipeline, the pipeline between the high-pressure water pump and the condenser, and the pipeline between the filter backwash water tank and the low-pressure water pump are all connected with a pressure transmitter and a flow meter, and the pressure transmitter and the flow meter are both electrically connected to the PLC cabinet.

[0014] The filtered water supply pipeline and the pipeline between the high-pressure water pump and the condenser are all connected with thermal resistors, and the thermal resistors are electrically connected to the PLC cabinet.

[0015] A liquid level meter is provided in the circulating water pool and is electrically connected to the PLC cabinet.

[0016] The circulating water pool is connected to the external water supply through a pipeline, and the pipeline is connected to a production water valve;

[0017] The filtered water outlet pipe is also connected to a cooling tower water inlet valve; the production water valve and the cooling tower water inlet valve are both electrically connected to the PLC cabinet.

[0018] The filtered water supply pipeline is also connected to the circulating water pool through a short-circuit valve and a pipeline, and the short-circuit valve is electrically connected to the PLC cabinet.

[0019] The backwash water inlet pipe is also connected to the filter backwash water tank through a clean water valve and a pipeline, and the clean water valve is electrically connected to the PLC cabinet.

[0020] The beneficial effects of the present invention are: through the centralized PLC control system, the water treatment area information is comprehensively monitored, and the temperature requirements of the cooling water supply are met by the start and stop alarms of the valves and related equipment. It has the characteristics of high integration, strong reliability, and strong operability. It has initially achieved unmanned operation, which plays a vital role in the stable operation of the RH furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the RH refining furnace water treatment control system structure;

[0022] In the figure, 1 is a hot water well; 2 is a circulating water tank; 3 is a cooling tower; 4 is a filter; 5 is a filter backwash tank; 6 is a condenser; 7 is a high-pressure water pump; 8 is a gas storage tank; 9 is a low-pressure water pump; 10 is a high-pressure water pump valve; 11 is a low-pressure pump valve; 12 is a pressure transmitter; 13 is a flow meter; 14 is a thermal resistor; 15 is a level gauge; 16 is a production water valve; 17 is a cooling tower water inlet valve; 18 is a short-circuit valve; 19 is a clean water valve;

[0023] a Filter water supply pipe; b Filter water outlet pipe; d Backwash water outlet pipe; e Backwash water inlet pipe; g First air inlet pipe; h Second air inlet pipe.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0025] [Example 1]

[0026] A RH refining furnace water treatment control system includes a hot water well 1, a circulating water pool 2, a cooling tower 3, a filter 4, a filter backwash pool 5, a condenser 6, a high-pressure water pump 7, a gas storage tank 8 and a PLC cabinet.

[0027] A filtered water supply pipe a is connected between the hot water well 1 and the filter 4, a filtered water outlet pipe b is connected between the filter 4 and the cooling tower 3, the cooling tower 3 is connected to the circulating water pool 2 through a pipe, a high-pressure water pump 7 is provided in the circulating water pool 2, and the high-pressure water pump 7 is connected to the condenser 6 through a pipe;

[0028] The air storage tank 8 is connected to the filter 4 through the first air intake pipe g and the second air intake pipe h;

[0029] A low-pressure water pump 9 is also provided in the circulating water pool 2, and the low-pressure water pump 9 is connected to the filter 4 through the backwash water inlet pipe e, and the filter 4 is connected to the filter backwash water pool 5 through the backwash water outlet pipe d;

[0030] The high-pressure water pump 7 is also connected to a high-pressure water pump valve 10, and the low-pressure water pump 9 is connected to a low-pressure pump valve 11;

[0031] The high-pressure water pump 7, the high-pressure water pump valve 10, the low-pressure water pump 9 and the low-pressure pump valve 11 are all electrically connected to the PLC cabinet.

[0032] The hot water well 1 and condenser 6 are the RH process equipment area. The water to be condensed and filtered is stored in the hot water well 1. The water pumped from the hot water well 1 enters the filter 4 through the filter water supply pipe a for filtration. After filtration, it enters the cooling tower through the filtered water outlet pipe b for cooling.

[0033] The cooled water is sent to the circulating water pool 2 through the pipeline, and the high-pressure water pump 7 sends the water in the circulating water pool 2 to the condenser 6 to complete the treatment of the RH water.

[0034] Filter 4 adopts a double cyclone filter with two air inlets, one for straight air intake and one for angled air intake to make the internal gas rotate.

[0035] The air tank 8 is connected to the external air supply, the first air inlet pipe g is connected to the straight air inlet, and the second air inlet pipe h is connected to the oblique air inlet. The internal air is rotated while stabilizing the pressure of the filter 4 to ensure stable operation of the filter 4.

[0036] The low-pressure water pump 9 draws the water in the circulating water pool 2 into the filter 4 through the backwash inlet pipe e and the low-pressure water pump 9 to backwash the filter 4. The backwashed water is sent to the filter backwash pool 5 through the backwash outlet pipe d. The filter backwash pool 5 is connected to the sewage main pipe and is discharged through the filter backwash pool 5.

[0037] The cooling tower 3, high-pressure water pump 7 and low-pressure water pump 9 are all connected to the PLC cabinet to achieve remote control and monitoring of start-up and shutdown and operating status, that is, the equipment control mechanism.

[0038] The pressure transmitter 12, flow meter 13, thermal resistor 14, and liquid level gauge 15 belong to the instrument monitoring structure. A high-voltage motor instrument box and a cooling tower fan instrument box can also be set up, all of which are connected to the PLC cabinet to transmit monitoring information to the PLC cabinet.

[0039] The production water valve 16, the cooling tower water inlet valve 17, the short-circuit valve 18 and the clean water valve 19 are all manual and automatic switching valves, which are connected to the PLC cabinet and serve as valve control mechanisms.

[0040] The entire PLC system transfers the action signal to the equipment control mechanism based on the monitoring information of the monitoring mechanism, and also receives the feedback signal from the equipment control mechanism;

[0041] Similarly, the PLC system receives monitoring information from the monitoring mechanism and transfers the action signal to the valve control mechanism, while also receiving feedback signals from the equipment valve control mechanism.

[0042] The filter 4 is a double cyclone filter.

[0043] The air inlet of the double cyclone filter includes a straight air inlet and an oblique air inlet, the first air inlet pipe g is connected to the straight air inlet, and the second air inlet pipe h is connected to the oblique air inlet.

[0044] The filter water supply pipe a, the pipe between the high-pressure water pump 7 and the condenser 6, and the pipe between the filter backwash water tank 5 and the low-pressure water pump 9 are all connected with a pressure transmitter 12 and a flow meter 13, and the pressure transmitter 12 and the flow meter 13 are both electrically connected to the PLC cabinet.

[0045] The filtered water supply pipe a and the pipe between the high-pressure water pump 7 and the condenser 6 are connected to a thermal resistor 14, and the thermal resistor 14 is electrically connected to the PLC cabinet.

[0046] The transmitter 12, flow meter 13 and thermal resistor 14 on the filtered water supply pipeline a are used to monitor the pressure, temperature and flow data of the water supply pipeline.

[0047] In the case of multiple filters 4, the filtered water supply pipe a will be connected to multiple branches to each filter 4, and the transmitter 12, flow meter 13 and thermal resistor 14 are connected to the unbranched main pipe.

[0048] The transmitter 12, flow meter 13 and thermal resistor 14 on the pipeline between the high-pressure water pump 7 and the condenser 6 are used to monitor the pressure, temperature and flow data of the outlet water.

[0049] The pressure transmitter 12 and flow meter 13 on the pipeline between the filter backwash water tank 5 and the low-pressure water pump 9 detect the pressure and flow data of the backwash water supply pipeline. If a branch pipe is branched, it is connected to the upstream main pipe.

[0050] The liquid level meter 15 is used to monitor the liquid level of the circulating water tank 2.

[0051] A liquid level meter 15 is provided in the circulating water pool 2 and is electrically connected to the PLC cabinet.

[0052] The circulating water pool 2 is connected to an external water supply through a pipeline, and a production water valve 16 is connected to the pipeline to control the production water to be supplied to the circulating water pool 2 .

[0053] The filtered water outlet pipe b is also connected to a cooling tower water inlet valve 17; the production water valve 16 and the cooling tower water inlet valve 17 are both electrically connected to the PLC cabinet. The cooling tower water inlet valve 17 controls the water inlet to the cooling tower 3.

[0054] The filtered water supply pipe a is also connected to the circulating water pool 2 through a short-circuit valve 18 and a pipe. The short-circuit valve 18 is electrically connected to the PLC cabinet. If there is a problem with the equipment, the protection device is opened and the water is directly sent to the circulating water pool 2.

[0055] The backwash water inlet pipe e is also connected to the filter backwash water tank 5 through a clean water valve 19 and a pipeline. The clean water valve 19 is electrically connected to the PLC cabinet. The clean water valve 19 is used to remove residual water in the pipeline when the equipment stops and drain it directly into the filter backwash water tank 5.

[0056] During operation, the PLC system receives return water pipe data from transmitter 12, flowmeter 13, and thermal resistor 14 on filtered water supply pipe a. It then issues control signals to the equipment to filter 4 and cool the water in cooling tower 3. It also determines whether water meets requirements based on water supply pipe data from transmitter 12, flowmeter 13, and thermal resistor 14 on the pipe between high-pressure water pump 7 and condenser 6. The entire water treatment control process and data collection process are transmitted to the monitoring center and displayed on a computer screen, facilitating monitoring and subsequent data browsing and printing.

[0057] PLC system configuration: PLC cabinet: CPU (Siemens 1515), dual power supplies (Siemens), memory card (Siemens), I / O modules (Siemens ET200SP series), communication modules (Siemens), relays, safety barriers, control cabinet (Rittal-like), switch (Siemens), photoelectric conversion module (Hertzmann), UPS (Santak). Control center: The system utilizes a Siemens 1500 series computer, an industrial computer (I7, 16GB RAM, 250GB solid-state drive + IT mechanical hard drive, and a 23-inch monitor), operating system (Microsoft Windows 10 Professional), configuration software WINC C V7.X (1024-point operation), programming software STEP 7 or Portal, and communication software supporting TCP / IP and PROFINET.

Claims

1. A RH refining furnace water treatment control system, characterized by: It includes a hot water well (1), a circulating water pool (2), a cooling tower (3), a filter (4), a filter backwash pool (5), a condenser (6), a high-pressure water pump (7), a gas storage tank (8) and a PLC cabinet. A filtered water supply pipe (a) is connected between the hot water well (1) and the filter (4), a filtered water outlet pipe (b) is connected between the filter (4) and the cooling tower (3), the cooling tower (3) is connected to the circulating water pool (2) through a pipe, a high-pressure water pump (7) is provided in the circulating water pool (2), and the high-pressure water pump (7) is connected to the condenser (6) through a pipe; The air storage tank (8) is connected to the filter (4) via a first air intake pipe (g) and a second air intake pipe (h); A low-pressure water pump (9) is also provided in the circulating water pool (2). The low-pressure water pump (9) is connected to the filter (4) via a backwash water inlet pipe (e), and the filter (4) is connected to the filter backwash water pool (5) via a backwash water outlet pipe (d). The high-pressure water pump (7) is further connected to a high-pressure water pump valve (10), and the low-pressure water pump (9) is connected to a low-pressure pump valve (11); The high-pressure water pump (7), the high-pressure water pump valve (10), the low-pressure water pump (9) and the low-pressure pump valve (11) are all electrically connected to the PLC cabinet.

2. The RH refining furnace water treatment control system according to claim 1, characterized in that: The filter (4) is a double cyclone filter.

3. The RH refining furnace water treatment control system according to claim 2, characterized in that: The air inlet of the double cyclone filter includes a straight air inlet and an oblique air inlet, the first air inlet pipe (g) is connected to the straight air inlet, and the second air inlet pipe (h) is connected to the oblique air inlet.

4. The RH refining furnace water treatment control system according to claim 1, characterized in that: The filter water supply pipe (a), the pipe between the high-pressure water pump (7) and the condenser (6), and the pipe between the filter backwash water tank (5) and the low-pressure water pump (9) are all connected to a pressure transmitter (12) and a flow meter (13). The pressure transmitter (12) and the flow meter (13) are both electrically connected to the PLC cabinet.

5. The RH refining furnace water treatment control system according to claim 1, characterized in that: The filtered water supply pipe (a) and the pipe between the high-pressure water pump (7) and the condenser (6) are both connected to a thermal resistor (14), and the thermal resistor (14) is electrically connected to the PLC cabinet.

6. The RH refining furnace water treatment control system according to claim 1, characterized in that: A liquid level meter (15) is provided in the circulating water pool (2), and the liquid level meter (15) is electrically connected to the PLC cabinet.

7. The RH refining furnace water treatment control system according to claim 1, characterized in that: The circulating water pool (2) is connected to an external water supply via a pipeline, and a production water valve (16) is connected to the pipeline; The filtered water outlet pipe (b) is also connected to a cooling tower water inlet valve (17); the production water valve (16) and the cooling tower water inlet valve (17) are both electrically connected to the PLC cabinet.

8. The RH refining furnace water treatment control system according to claim 1, characterized in that: The filtered water supply pipeline (a) is also connected to the circulating water pool (2) through a short-circuit valve (18) and a pipeline, and the short-circuit valve (18) is electrically connected to the PLC cabinet.

9. The RH refining furnace water treatment control system according to claim 1, characterized in that: The backwash water inlet pipe (e) is also connected to the filter backwash water tank (5) through a clean water valve (19) and a pipeline, and the clean water valve (19) is electrically connected to the PLC cabinet.

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