Steel slag roller breaking pressure hot braising circulating water system

Abstract

The embodiment of the utility model provides a steel slag roller breaking pressure hot braising circulating water system which comprises a spray tower, a sedimentation tank, a chemical storage tank, a chemical feeding pump and a controller, the sedimentation tank is connected with the spray tower through a pipeline, an inlet of the dosing pump is connected with an outlet of the chemical storage tank through a pipeline, an outlet of the dosing pump is connected with the sedimentation tank through a pipeline, and the middle part of the sedimentation tank is also connected with a first turbidity detector; the first turbidity detector and the dosing pump are electrically connected with the controller respectively. According to the technical scheme, the running state of the dosing pump can be adjusted in real time according to detection data of the turbidity detector, so that the input amount of a flocculating agent is adjusted in real time, and the problem of medicament waste caused by continuous dosing in the prior art is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of steel production, in particular to a circulating water system, more specifically to a slag roller crusher with pressurized hot stewing circulating water system. Background Art

[0002] During the roller crushing process of steel slag (i.e. steel slag roller crushing), it is necessary to use a spray water pump to pump water from the water pool, then spray water on the steel roller to cool it down, and then use a fan to pump steam into the spray tower, and the steam condenses into liquid water and gathers in the spray tower; then the condensed water in the spray tower is transported to the water pool through the pipeline for reuse, thus forming a cyclic working process. The system consisting of the spray tower, pipeline and water pool is called the steel slag roller crushing pressurized hot stewing circulating water system. A large amount of dust and high-temperature steam will be generated during water spray cooling. After the fan pumps the high-temperature steam carrying dust into the spray tower, a large amount of dust enters the water and then flows into the circulating cooling water system, so that the steel slag roller crushing pressurized hot stewing circulating cooling water has high pH value, high hardness and high turbidity problems. If it cannot be effectively handled, it is easy to cause scaling and blockage of pipelines and equipment during recycling. In severe cases, it may also cause safety accidents and cannot be continuously and stably produced normally. Therefore, additional measures must be taken to reduce the turbidity of cooling water, as well as reduce indicators such as pH value and hardness.

[0003] In traditional technology, the turbidity of cooling water can be reduced by setting up a horizontal flow sedimentation tank. However, using a horizontal flow sedimentation tank to reduce turbidity generally requires a larger space. If the plant space is limited, it is impossible to build a large horizontal flow sedimentation tank.

[0004] As an improvement method, polyacrylamide and other flocculants can be added to the pool to precipitate harmful substances in the pool and dredge regularly to reduce the turbidity of the circulating water (polyacrylamide is added to perform flocculation and precipitation to reduce turbidity, and sodium carbonate and carbon dioxide are added to reduce pH and remove calcium. This application mainly focuses on improving the existing methods of reducing turbidity). When taking water, only the clean water on the upper layer of the pool is extracted to avoid affecting the operation of the system.

[0005] In the process of implementing the present utility model, the inventors found that there are at least the following problems in the prior art:

[0006] In actual application, in order to ensure that the slag treatment forward roller crushing step is in intermittent open mode, the spray tower is always in the open state. When the slag is roller-broken, the dust generated enters the water, and the turbidity of the water outlet from the spray tower increases significantly. When the roller is not broken, the water outlet from the spray tower is clean system circulating water, that is, the turbidity of the water outlet from the spray tower fluctuates. About 30-40 minutes in an hour is in the state of no roller breaking, and the turbidity of the water outlet from the spray tower is low. Therefore, in fact, when the roller is not broken, the water quality is clean and uncontaminated system water, and there is no need to add flocculants at this time. However, in the prior art, the dosing pump used to add flocculants has been running continuously at a uniform speed, resulting in a waste of reagents, which in turn pushes up production costs. Therefore, how to avoid waste of reagents and reduce production costs is a problem that needs to be solved. Utility Model Content

[0007] The utility model provides a slag roller crusher with a pressurized hot stewing circulating water system, which is used to solve the problems of reagent waste and high production cost in the prior art.

[0008] To achieve the above-mentioned purpose, an embodiment of the utility model provides a slag roller crusher with a pressurized hot stewing circulating water system, comprising: a spray tower, a sedimentation tank, a drug storage tank, a dosing pump, and a controller; the sedimentation tank is connected to the spray tower by a pipeline, the inlet of the dosing pump and the outlet of the drug storage tank are connected by a pipeline, the outlet of the dosing pump is connected to the sedimentation tank by a pipeline, and the sedimentation tank is also connected to a first turbidity detector; the first turbidity detector and the dosing pump are electrically connected to the controller respectively.

[0009] Furthermore, the pressurized hot stewing circulating water system of the slag roller crusher also includes a clear water tank and a reuse water tank; the clear water tank is connected to the sedimentation tank through a water pump, and the reuse water tank is connected to the clear water tank; the water pump is electrically connected to the controller.

[0010] Furthermore, the reuse water pool is connected to the spray tower by a pipeline.

[0011] Furthermore, a three-way valve is included between the spray tower and the sedimentation tank; the first passage of the three-way valve is connected to the spray tower through the spray tower outlet pipe section; the second passage of the three-way valve is connected to the sedimentation tank through the sedimentation tank inlet pipe section; the third passage of the three-way valve is connected to the reuse water pool through the reuse water pool inlet pipe section.

[0012] Furthermore, the three-way valve is an electric valve, and the three-way valve is electrically connected to the controller.

[0013] Furthermore, a second turbidity detector is provided at the outlet pipe section of the spray tower, and the second turbidity detector is electrically connected to the controller.

[0014] Furthermore, there are two spray towers in total; the two spray towers are arranged in parallel.

[0015] Furthermore, there are multiple first turbidity detectors and multiple second turbidity detectors; the multiple first turbidity detectors are evenly distributed in the sedimentation tank, and the multiple second turbidity detectors are evenly distributed in the outlet pipe section of the spray tower.

[0016] Furthermore, the controller is a PLC control unit.

[0017] Furthermore, the dosing pump is a diaphragm metering pump.

[0018] The above technical solution has the following beneficial effects:

[0019] In the technical solution of the utility model, the operating frequency of the dosing pump can be adjusted in real time according to the detection of the first turbidity detector, so as to dynamically adjust the dosage of the drug, and add the required amount, thereby avoiding the waste of flocculants and reducing production costs.

[0020] In addition, this technical solution also has the following characteristics:

[0021] This technical solution expands the existing single water tank into a sedimentation tank, a clean water tank and a reuse water tank, and sets a second turbidity detector at the outlet of the spray tower. When the water from the spray tower is judged to be clean water, the water does not need to enter the sedimentation tank and can flow directly into the reuse water tank without adding drugs; when the water from the spray tower is judged to be turbid water, the turbid water is diverted to the sedimentation tank, so that the particles such as steel slag powder in the water react fully with the flocculant to form flocculation precipitation, and then transferred to the reuse water tank through the clean water tank after reducing the turbidity. In this way, it is possible to avoid the mixing of clean water and turbid water entering the same water tank, improve the treatment efficiency, further reduce the waste of drugs, and reduce production costs. In addition, the water in the clear water tank is eventually transferred to the reuse water tank. In subsequent work, cooling water is drawn from the reuse water tank and sprayed onto the steel roller for cooling, thereby separating the water intake point from the sedimentation tank. This ensures that turbid water that has not had time to settle in the tank will not be pumped out during the water intake operation, effectively avoiding blockage of water pumps and pipes, reducing equipment failure rate, and ensuring stable operation of the circulating water system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of a slag roller crusher with a pressurized hot stewing circulating water system according to the utility model;

[0024] Figure 2This is a system schematic diagram of another embodiment of a slag roller crusher with a pressurized hot stewing circulating water system according to the utility model;

[0025] Figure 3 This is a working schematic diagram of a slag roller crusher with pressurized hot stewing circulating water system in actual application;

[0026] Figure numbers: 1. Spray tower; 2. Second turbidity detector; 3. Spray tower outlet pipe section; 4. Three-way valve; 5. Controller; 6. Recycling water pool inlet pipe section; 7. Sedimentation tank inlet pipe section; 8. Drug storage tank; 9. Dosing pump; 10. Recycling water pool; 11. Clean water pool; 12. Water pump; 13. Sedimentation tank; 14. First turbidity detector; 15. Spray water pump; 16. Fan. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1 As shown, an embodiment of the utility model provides a slag roller crusher with a pressurized hot stewing circulating water system, comprising: a spray tower 1, a sedimentation tank 13, a drug storage tank 8, a dosing pump 9, and a controller 5; the sedimentation tank 13 is connected to the spray tower 1 by a pipeline, the inlet of the dosing pump 9 is connected to the outlet of the drug storage tank 8 by a pipeline, the outlet of the dosing pump 9 is connected to the sedimentation tank 13 by a pipeline, and the sedimentation tank 13 is also connected to a first turbidity detector 14; the first turbidity detector 14 and the dosing pump 9 are electrically connected to the controller 5 respectively.

[0029] In order to solve the above-mentioned problems, in the present technical scheme, a first turbidity detector 14 is arranged in the sedimentation tank 13 (or connected to the outside of the sedimentation tank through a pipeline) to detect the turbidity value of the water in the sedimentation tank 13. After the detection value is fed back to the controller 5 by the first turbidity detector 14, the controller 5 can determine the required dosage of the currently required flocculant (for example, polyacrylamide) through a preset algorithm, and then adjust the operating frequency of the dosing pump 9. When the required dosage is large, the operating frequency is increased, and when the required dosage is small, the operating frequency is reduced, thereby realizing dynamic adjustment of the flocculant dosage. Compared with the continuous constant speed dosing method of the prior art, it can greatly save chemicals, thereby reducing production costs.

[0030] Furthermore, the slag roller crusher pressurized hot stewing circulating water system also includes a clear water tank 11 and a reuse water tank 10; the clear water tank 11 is connected to the sedimentation tank 13 through a water pump 12, and the reuse water tank 10 is connected to the clear water tank 11; the water pump 12 is electrically connected to the controller 5.

[0031] In order to ensure that the impurities that have not been completely precipitated in the sedimentation tank 13 are extracted when the spray water pump is working, in this technical solution, an additional clean water tank 11 is also set up on the side of the sedimentation tank 13, and the two are connected to the water pump 12 through a pipeline. When the detection value of the first turbidity detector 14 reaches the preset threshold, the controller 5 gives a control signal to the water pump 12, and the water pump 12 transfers the usable clean water obtained after precipitation in the sedimentation tank 13 to the clean water tank 11, thereby achieving complete separation of sediment and clean water. In the clean water tank 11, if necessary, other subsequent processes such as reducing hardness can be carried out.

[0032] In addition to the clean water tank 11, a reuse water tank 10 is connected by pipelines or ditches. The water in the reuse water tank 10 is taken from the clean water tank 11, which is the final collection place of cooling water in the pressurized hot stewing circulating water system of the entire slag roller crusher. The reuse water tank 10 serves as the water intake point of the spray water pump 15, which can avoid directly taking water from the sedimentation tank 13 as in the prior art, resulting in turbid water being pumped out and sprayed onto the steel rollers in the slag roller crushing area.

[0033] Furthermore, the reuse water pool 10 is connected to the spray tower 1 by a pipeline.

[0034] In order to further reduce the use efficiency of flocculants and reduce waste, in the present technical solution, the reuse water pool 10 is also directly connected to the spray tower 1. In this way, there is a passage between the spray tower 1 and the reuse water pool 10, and there is a passage between the spray tower 1 and the sedimentation tank 13. The two passages are arranged in parallel. When the operator determines that the water output by the spray tower 1 is clear water and does not need to be flocculated and precipitated, the spray tower 1 can be directly connected to the reuse water pool 10 through the corresponding opening and closing device (for example, a valve is respectively arranged upstream of the two passages), that is, the water is directly led to the reuse water pool 10; and when the operator determines that the water output by the spray tower 1 is turbid water and needs to be flocculated and precipitated, the spray tower 1 can be connected to the sedimentation tank 13 through the corresponding opening and closing device, that is, the water is led to the sedimentation tank 13, so that the turbid water returns to the reuse water pool 10 after flocculation treatment.

[0035] Furthermore, a three-way valve 4 is included between the spray tower 1 and the sedimentation tank 13; the first passage of the three-way valve 4 is connected to the spray tower 1 through the spray tower outlet pipe section 3; the second passage of the three-way valve 4 is connected to the sedimentation tank 13 through the sedimentation tank inlet pipe section 7; the third passage of the three-way valve 4 is connected to the reuse water tank 10 through the reuse water tank inlet pipe section 6.

[0036] In order to avoid the simultaneous connection of the two passages of the spray tower 1 and the reuse water pool 10 and the spray tower 1 and the sedimentation pool 13 due to operational errors, a three-way valve 4 is preferably installed downstream of the spray tower 1, so that the two passages arranged in parallel share a control valve (i.e., the three-way valve 4). The three-way valve 4 has three passages (i.e., openings), which are respectively connected to the spray tower 1, the sedimentation pool 13, and the reuse water pool 10 through pipelines. The three-way valve 4 has two opening positions, and in any opening position, there are two openings that are connected. Therefore, when the three-way valve 4 is in one opening position, the spray tower 1 is connected with the sedimentation tank 13 (at this time, the water in the spray tower 1 enters the sedimentation tank 13 along the spray tower outlet pipe section 3, the three-way valve 4, and the sedimentation tank inlet pipe section 7); in the other opening position, the spray tower 1 is connected with the reuse water pool 10 (at this time, the water in the spray tower 1 enters the reuse water pool 10 along the spray tower outlet pipe section 3, the three-way valve 4, and the reuse water pool inlet pipe section 6). In this way, the spray tower 1 cannot be connected with the reuse water pool 10 and the sedimentation tank 13 at the same time, thereby avoiding operational errors.

[0037] Furthermore, the three-way valve 4 is an electric valve, and the three-way valve 4 is electrically connected to the controller 5 .

[0038] In order to further improve the level of automation, the three-way valve 4 is preferably an electric valve, which can perform actions based on the control signal given by the controller 5 without manual on-site operation.

[0039] Furthermore, in order to more accurately and quickly determine the water quality at the outlet of the spray tower 1 , a second turbidity detector 2 may be provided at the outlet pipe section 3 of the spray tower, and the second turbidity detector 2 is electrically connected to the controller 5 .

[0040] Furthermore, there are two spray towers 1; the two spray towers 1 are arranged in parallel.

[0041] like Figure 2 As shown, in order to further meet actual work needs, two parallel spray towers 1 (or called 1# spray tower and 2# spray tower) can be set in the system. The two are set in parallel, and a second turbidity detector 2 is set at the outlet of each spray tower 1, and the two can share the recycled water pool inlet pipe section 6 and the sedimentation tank inlet pipe section 7.

[0042] Furthermore, there are multiple first turbidity detectors 14 and multiple second turbidity detectors 2; multiple first turbidity detectors 14 are evenly distributed in the sedimentation tank 13, and multiple second turbidity detectors 2 are evenly distributed in the spray tower outlet pipe section 3. By increasing the number of sensors (including the first turbidity detector 14 and the second turbidity detector 2), multi-point detection is achieved, and the average value is taken as the judgment data, which can further increase the reliability and efficiency of the detection.

[0043] Furthermore, the controller 5 is a PLC control unit. PLC is safe, reliable, and highly resistant to interference, and is widely used in the field of industrial control. Therefore, in this application, PLC is preferably used as the control core.

[0044] Furthermore, in order to make the drug output accurate and controllable, the drug adding pump 9 is preferably a diaphragm metering pump.

[0045] According to actual measurement, in a specific embodiment of the technical solution of the present application, when the technical solution of the present application is not adopted, the treated system water is sampled and tested every day for 5 consecutive days, and the turbidity is 44.9, 36.1, 22.4, 56.7, 60.6 (unit: NTU); while after adopting the slag roller crusher with pressurized hot stewing circulating water system of the present application, the turbidity of the water quality for 5 consecutive days after two weeks is 10.6, 14.1, 15.4, 7.82, 8.14 (unit: NTU), and the average turbidity of the water quality is reduced by 74.6%. At the same time, since the dosage can be automatically adjusted according to the turbidity detection data, the dosage of polyacrylamide can be saved by about 32.3% per week.

[0046] like Figure 3 As shown, the working process of the embodiment of the utility model is specifically described:

[0047] When the slag roller crusher has a pressurized hot stewing circulating water system in operation, it is first necessary to monitor the change of turbidity value in real time through the second turbidity detector 2 installed at the water outlet of the two spray towers 1 (or called 1# spray tower and 2# spray tower), and according to the signal fed back by the second turbidity detector 2, the controller 5 (with PLC as the control core) has a built-in algorithm model to judge the water with turbidity less than a preset threshold value (for example, N1) as clean water, and the water with turbidity greater than the preset threshold value (for example, N1) as turbid water. When the effluent is determined to be clear water, the three-way valve 4 changes direction through the control signal given by the controller 5, so that the spray tower outlet pipe section 3 is connected to the reuse water pool inlet pipe section 6, and the water can be directly introduced into the reuse water pool 10; and when the effluent is determined to be turbid water, the controller 5 adjusts the control signal to change the direction of the three-way valve 4 again, so that the spray tower outlet pipe section 3 is connected to the sedimentation tank inlet pipe section 7, so that the water flow is introduced into the sedimentation tank 13, and the polyacrylamide given by the dosing pump 9 is subjected to a long period of flocculation reaction to maximally settle the suspended matter in the water. The first turbidity detector 14 installed in the sedimentation tank 13 can monitor the turbidity value in the sedimentation tank 13 in real time, and feedback the signal to the controller 5. The built-in algorithm model in the controller 5 will calculate the required dosage of polyacrylamide according to the received turbidity value, and then adjust the operating frequency of the dosing pump 9 in real time, saving the cost of adding the agent and more effectively reducing the turbidity of the water quality. When the value detected by the first turbidity detector 14 is less than the preset threshold, the controller 5 receives the numerical signal and starts the water pump 12 to pump the clean water obtained from the upper layer of the sedimentation tank 13 to the clean water tank 11. Thereafter, other processes such as reducing the hardness are completed in the clean water tank 11. Finally, the treated water is introduced into the reuse water tank 10 through the pipeline or ditch between the clean water tank 11 and the reuse water tank 10. The water in the reuse water tank 10 is pumped out again by the spray water pump 15 and sprayed onto the steel roller in the slag roller breaking area, and the high-temperature steam is pumped into the spray tower 1 by the fan 16 again to realize the circulation operation.

[0048] It should be noted that, in the actual process, in order to further avoid scaling of the pipelines, in addition to the aforementioned ditches replacing the pipelines between the clear water tank 11 and the reuse water tank 10, the pipelines between the spray tower 1 and the reuse water tank 10, and the pipelines between the spray tower 1 and the sedimentation tank 13, etc. can also be replaced by ditches, which does not affect the technical effect after implementation.

[0049] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than those clearly stated in each claim. On the contrary, as reflected in the attached claims, the utility model is in a state with less than all the features of the disclosed individual embodiments. Therefore, the attached claims are hereby expressly incorporated into the detailed description, with each claim acting alone as a separate preferred embodiment of the utility model.

[0050] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined herein may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in the present application.

[0051] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A slag roller crusher with pressurized hot stewing circulating water system, characterized in that: include: A spray tower (1), a sedimentation tank (13), a drug storage tank (8), a dosing pump (9), and a controller (5); the sedimentation tank (13) and the spray tower (1) are connected by a pipeline, the inlet of the dosing pump (9) and the outlet of the drug storage tank (8) are connected by a pipeline, the outlet of the dosing pump (9) and the sedimentation tank (13) are connected by a pipeline, and the sedimentation tank (13) is also connected to a first turbidity detector (14); the first turbidity detector (14) and the dosing pump (9) are respectively electrically connected to the controller (5).

2. The slag roller crusher with pressurized hot stewing circulating water system according to claim 1, characterized in that: It also includes a clear water tank (11) and a reuse water tank (10); the clear water tank (11) is connected to the sedimentation tank (13) via a water pump (12), and the reuse water tank (10) is connected to the clear water tank (11); the water pump (12) is electrically connected to the controller (5).

3. The slag roller crusher with pressurized hot stewing circulating water system as claimed in claim 2, characterized in that: The reuse water pool (10) and the spray tower (1) are connected by a pipeline.

4. The slag roller crusher with pressurized hot stewing circulating water system as claimed in claim 3, characterized in that: A three-way valve (4) is also provided between the spray tower (1) and the sedimentation tank (13); a first passage of the three-way valve (4) is connected to the spray tower (1) via a spray tower outlet pipe section (3); a second passage of the three-way valve (4) is connected to the sedimentation tank (13) via a sedimentation tank inlet pipe section (7); and a third passage of the three-way valve (4) is connected to the reuse water pool (10) via a reuse water pool inlet pipe section (6).

5. The slag roller crusher with pressurized hot stewing circulating water system as claimed in claim 4, characterized in that: The three-way valve (4) is an electric valve, and the three-way valve (4) is electrically connected to the controller (5).

6. The slag roller crusher with pressurized hot stewing circulating water system as claimed in claim 5, characterized in that: A second turbidity detector (2) is provided on the spray tower outlet pipe section (3); the second turbidity detector (2) is electrically connected to the controller (5).

7. The slag roller crusher with pressurized hot stewing circulating water system as claimed in claim 6, characterized in that: There are two spray towers (1) in total; the two spray towers (1) are arranged in parallel.

8. The slag roller crusher with pressurized hot stewing circulating water system as claimed in claim 6, characterized in that: There are multiple first turbidity detectors (14) and multiple second turbidity detectors (2); multiple first turbidity detectors (14) are evenly distributed in the sedimentation tank (13), and multiple second turbidity detectors (2) are evenly distributed in the spray tower outlet pipe section (3).

9. The slag roller crusher with pressurized hot stewing circulating water system according to claim 1, characterized in that: The controller (5) is a PLC control unit.

10. The slag roller crusher with pressurized hot stewing circulating water system according to claim 1, characterized in that: The dosing pump (9) is a diaphragm metering pump.

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