A control device for directional steam allocation of sintering waste heat boiler

Abstract

The present invention relates to the technical field of iron and steel smelting, and in particular to a control device for directional allocation of steam for a sintering waste heat boiler, comprising two steam generating systems consisting of a sintering machine, a cooler and a sintering waste heat boiler, and a steam power generation system consisting of a steam-water separator, a steam turbine and a cooling tower. The steam generated by the steam generating system flows to the steam power generation system in a steam main pipeline. A first steam connecting pipe is arranged on the steam main pipeline of the steam generating system. The output ends of the first steam connecting pipes of two adjacent steam generating systems are respectively connected to the second steam connecting pipe. The technical solution connects the steam main pipelines of the two adjacent steam generating systems through the first steam connecting pipe and the second steam connecting pipe, and cooperates with a one-way valve to realize that the steam in the steam generating system with a high steam volume flows into the steam main pipeline of the steam generating system with a low steam volume, so as to evenly distribute the steam of the two steam generating systems.

Description

Technical Field

[0001] The invention relates to the technical field of steel smelting, and in particular to a control device for directional steam allocation of a sintering waste heat boiler. Background Art

[0002] A large amount of high-temperature waste gas is generated during the sintering production process. Using the waste heat from sintering to generate electricity is a good energy recovery method. The heat that can be recovered in the sintering production process comes from the sensible heat of the sintering machine flue gas and the sensible heat of the sinter cooler waste gas. The heat of these two gases accounts for about 50% of the total sintering heat, of which the average temperature of the sintering flue gas generally does not exceed 150°C, and the sensible heat contained in it accounts for about 13% to 20% of the total heat. The temperature of the cooler waste gas is between 100°C and 400°C, and its sensible heat accounts for 20% to 35% of the total heat. Recovering this heat is an important part of the waste heat utilization of the sintering process.

[0003] There are generally two main sources for sintering high-temperature waste heat recovery, one is flue gas, and the other is cooling waste gas. In the prior art, a sintering waste heat power generation system usually consists of a steam generation system and a steam turbine power generation system. The steam generation system uses multiple sintering machines. The sintering machine recovers waste heat through a waste heat boiler to generate steam. Due to different construction times of waste heat boilers, different equipment levels, different process layouts, different production conditions, and different steam production of each sintering machine; at the same time, due to different steam consumption of each sintering machine, it is inevitable that some waste heat boilers will have a long-term excess of steam, while some will have a long-term shortage of steam. Summary of the invention

[0004] Based on this, it is necessary to provide a control device for directional allocation of steam for sintering waste heat boilers in response to the existing technical problems.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0006] A control device for directional allocation of steam for a sintering waste heat boiler comprises a steam generating system consisting of a sintering machine, a cooler and a sintering waste heat boiler, and a steam power generation system consisting of a steam-water separator, a steam turbine and a cooling tower. The steam generating system and the steam power generation system have at least two. The steam generated by the steam generating system flows to the steam power generation system in a steam main pipeline. A first steam connecting pipe is arranged on the steam main pipeline of the steam generating system. The output ends of the first steam connecting pipes of two adjacent steam generating systems are respectively connected to the second steam connecting pipes. The steam enters the steam main pipeline of the steam generating system on one side through the first steam connecting pipe and the second steam connecting pipe.

[0007] Preferably, a first air inlet is provided at the input end of the steam main pipeline, and the first air inlet is connected to the output end of the sintering waste heat boiler of the steam generating system; a first air outlet is provided at the end of the steam main pipeline away from the first air inlet, and the first air outlet is hermetically connected to the input end of the air outlet pipeline, and the output end of the air outlet pipeline is connected to the input end of the steam-water separator of the steam power generation system.

[0008] Preferably, a second air outlet is also provided on the steam main pipeline, and the second air outlet is located between the first air inlet and the first air outlet. The second air outlet is connected to the input end of the first steam connecting pipe through a pressure control unit, and the pressure control unit is used to control the steam to enter the first steam connecting pipe.

[0009] Preferably, the pressure control unit includes a first safety valve fixedly installed at the connection between the second air outlet and the input end of the first steam connecting pipe. The input end of the valve cavity in the first safety valve is tightly connected to the second air outlet through a bracket. The cross-sectional diameter of the valve cavity expands from the input end to the output end. A valve core is arranged in the valve cavity. A spring is coaxially inserted on the valve core. The spring blocks the input end of the valve cavity. The valve core and the spring are elastically connected and sleeved on the valve core. The spring moves along the axial direction of the valve cavity.

[0010] Preferably, the steam-water separator is provided with a steam-water detection device for:

[0011] Collecting working information of the steam-water separator;

[0012] Analyze the working information, and determine whether the steam-water separator has completed the separation work according to the analysis result;

[0013] If yes, generating a first preset light with a first brightness and utilizing the first preset light to illuminate the steam power generation system;

[0014] Acquire a first inspection light reflected by the steam power generation system;

[0015] Respectively transmitting the first preset light and the first inspection light to a preset waveform display model to perform waveform display work, and obtaining corresponding first waveforms and second waveforms;

[0016] Acquire a plurality of first peaks contained in the first waveform and a plurality of second peaks contained in the second waveform;

[0017] extracting a maximum peak value of the first waveform from among the first peak values;

[0018] respectively calculating the peak ratio between each second peak and the maximum peak;

[0019] Obtaining all peak ratios for discrete analysis to obtain the discreteness of the peak ratios, and determining that steam-water is residual in the steam power generation system when the discreteness is not within a preset discreteness range;

[0020] After determining that steam and water remain in the steam power generation system, generating a second preset light of a second brightness and using the second preset light to illuminate the steam power generation system;

[0021] Acquire a second inspection light reflected by the steam power generation system;

[0022] Inputting the second preset light and the second test light into a preset grating model respectively to perform light diffraction work to obtain a corresponding standard spectrum and test spectrum;

[0023] Performing wavelength classification on the standard spectrum and the test spectrum respectively to obtain a first wavelength set and a second wavelength set;

[0024] The first wavelength set is regarded as a standard set, and is mapped with the second wavelength set to obtain a mapping result.

[0025] Analyze the mapping result, extract the target second wavelength that failed to be mapped, and mark the abnormal area corresponding to the target second wavelength on the inspection spectrum;

[0026] Inputting the standard spectrum and the marked test spectrum into the same coordinate system, marking a target area corresponding to the abnormal area on the standard spectrum;

[0027] Comparing the target area with the abnormal area to obtain a plurality of contrasting outliers contained in the abnormal area;

[0028] According to the number of the contrasting outliers, the amount of steam and water remaining in the steam power generation system is queried in a preset quantity-concentration list, and when the amount of steam and water remaining is greater than a preset residual amount threshold, a reminder message is generated and displayed.

[0029] Preferably, the pressure control unit includes a first solenoid valve fixedly installed at the connection between the second air outlet and the input end of the first steam connecting pipe. A pressure gauge is provided on the air outlet pipe of the steam main pipe. The pressure gauge detects the steam pressure value in the steam main pipe. The pressure gauge signal is connected to the first solenoid valve, and the pressure gauge controls the switch of the first solenoid valve.

[0030] Preferably, the second steam connecting pipe includes a first branch pipe and a second branch pipe, the axes of the first branch pipe and the second branch pipe are parallel to each other, the two ends of the first branch pipe and the second branch pipe are respectively connected to the main pipe, a connecting port is arranged at the center position of the main pipe, and the two connecting ports of the second steam connecting pipe are respectively fixedly connected to one end of the first steam connecting pipe away from the second air outlet through connecting flanges.

[0031] Preferably, the first branch pipe and the second branch pipe are both provided with a second one-way valve, and an output end of the second one-way valve on the first branch pipe is arranged opposite to an output end of the second one-way valve on the second branch pipe.

[0032] Preferably, a connecting branch is provided at one end of the first steam connecting pipe facing the steam main pipe, the input end of the connecting branch is arranged on the lower side of the connection position between the first steam connecting pipe and the second air outlet, the output end of the connecting branch is sealedly connected to the second air inlet on the steam main pipe, the second air inlet is arranged between the first air inlet and the first air outlet, and a first one-way valve is provided at the connection between the connecting branch and the second air inlet; the input end of the first one-way valve is connected to the output end of the connecting branch, and the output end of the first one-way valve is connected to the second air inlet of the steam main pipe.

[0033] Preferably, the cooler is provided with a control device for controlling the cooler to cool the sintering chamber of the sintering machine, specifically:

[0034] Acquiring material parameters of the sintering chamber, and determining a heat absorption coefficient and a heat transfer coefficient of the sintering chamber according to the material parameters;

[0035] Detecting the internal temperature of the sintering chamber after the sintering chamber is finished working and the external temperature of the sintering chamber, and calculating the temperature difference according to the internal temperature and the external temperature;

[0036] detecting a gas density of the steam generated in the sintering chamber, and determining an adiabatic index of the steam generated according to the gas density;

[0037] The heat transfer of the sintering chamber is calculated based on the adiabatic index and temperature difference of the generated steam and the heat absorption coefficient and heat transfer coefficient of the sintering chamber:

[0038]

[0039] Wherein, P represents the heat transfer of the sintering chamber, K represents the heat transfer coefficient of the sintering chamber, A represents the heat conduction area inside the sintering chamber, s represents the surface area of ​​the sintering chamber, s1 represents the working area area of ​​the sintering chamber, E represents the heat absorption coefficient of the sintering chamber, M represents the heat diffusion factor of the inner wall of the sintering chamber, k represents the adiabatic index of the generated steam, a represents the flow velocity coefficient of the generated steam in the sintering chamber, ln represents the natural logarithm, F1 represents the steam pressure inside the sintering chamber, F2 represents the atmospheric pressure outside the sintering chamber, and B represents the temperature difference;

[0040] The optimal cooling temperature of the sintering chamber for the cooler is calculated according to the heat transfer of the sintering chamber:

[0041]

[0042] Wherein, Q represents the optimal cooling temperature of the cooler for the sintering chamber, Q1 represents the lowest cooling temperature of the cooler, P1 represents the reference threshold of the heat transfer of the sintering chamber at room temperature, q represents the maximum effect factor of the relative cold air flow at the lowest cooling temperature of the cooler, l represents the inner wall thickness of the sintering chamber, s2 represents the heating area of ​​the sintering chamber, v1 represents the internal volume of the sintering chamber, x represents the dryness coefficient of the space where the sintering chamber is located, y represents the indirect evaporative cooling efficiency of the cooler at the lowest cooling temperature, i represents the distance between the cooler and the sintering chamber, d represents the maximum action range of the cooler, and v1 represents the overall volume of the sintering chamber;

[0043] The cooler is controlled to cool the sintering chamber at the optimal refrigeration temperature, and the cooler is turned off when the heat transfer of the sintering chamber is less than or equal to a reference threshold of the heat transfer of the sintering chamber at room temperature.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. The present invention connects the steam main pipelines of two adjacent steam generating systems through a first steam connecting pipe and a second steam connecting pipe, so that the steam in the steam generating system that generates a high amount of steam can flow into the steam main pipeline of the steam generating system that generates a low amount of steam through the first steam connecting pipe and the second steam connecting pipe, thereby evenly distributing the steam of the two steam generating systems.

[0046] 2. The present invention controls the opening and closing of the second air outlet through a pressure control unit. When the pressure control unit is turned on, the steam in the steam main pipe passes through the first steam connecting pipe and the second steam connecting pipe into the steam main pipe of another steam generating system to achieve steam allocation. When the pressure control unit is closed, the connection between the steam main pipes of the two steam generating systems is cut off.

[0047] 3. The present invention uses a second one-way valve to ensure that the steam entering the second steam connecting pipe from the first steam connecting pipe of the steam generating system on one side can only enter the first steam connecting pipe on the other side along a single direction through the first branch pipe or the second branch pipe, thereby realizing the directional movement of steam from the steam generating system with high steam generation to the steam generating system with low steam generation.

[0048] 4. The present invention provides a connecting branch pipe at one end of the first steam connecting pipe to connect to the second air inlet of the steam main pipe, so as to complete the steam allocation without opening the pressure control unit, and prevent the steam in the steam main pipe from entering the first steam connecting pipe when the pressure control unit is opened, causing a certain loss and affecting the efficiency of steam allocation, thus ensuring the steam allocation effect.

[0049] 5. The present invention sets a first one-way valve at the connection between the connecting branch pipe and the second air inlet. The first one-way valve ensures that the steam in the first steam connecting pipe can only enter the steam main pipe in one direction and the steam in the steam main pipe cannot flow back into the first steam connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a top view of the first embodiment of the present application;

[0051] Figure 2 is a perspective view of the first embodiment of the present application;

[0052] Figure 3 yes Figure 2 A local enlarged view of point A;

[0053] Figure 4 yes Figure 2 A partial enlarged view of point B;

[0054] Figure 5 is a three-dimensional structural exploded view of the second steam connecting pipe of the present application;

[0055] Figure 6 is a front view of the first embodiment of the present application;

[0056] Figure 7 yes Figure 6 A cross-sectional view of the section at CC;

[0057] Figure 8 yes Figure 7 A partial enlarged view of point D;

[0058] Fig. 9 is a three-dimensional diagram of a steam main pipeline and a first steam connection pipe according to a second embodiment of the present application;

[0059] Fig.10 It is a three-dimensional structural exploded view of the steam main pipeline and the first steam connecting pipe of the second embodiment of the present application;

[0060] The numbers in the figure are:

[0061] 1-steam main pipeline; 1a-first air inlet; 1b-first air outlet; 1b1-air outlet pipeline; 1c-second air outlet; 1c1-pressure control unit; 1d-pressure gauge; 1e-second air inlet;

[0062] 2-first steam connecting pipe; 2a-first safety valve; 2a1-valve chamber; 2a2-bracket; 2a3-valve core; 2a4-spring; 2b-first solenoid valve; 2c-connecting branch pipe; 2c1-first one-way valve;

[0063] 3-second steam connecting pipe; 3a-first branch pipe; 3b-second branch pipe; 3c-main pipe; 3c1-connecting port; 3c2-connecting flange; 3d-second one-way valve. DETAILED DESCRIPTION

[0064] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0065] like Figures 1 to 10 As shown, this application provides:

[0066] A control device for directional allocation of steam for a sintering waste heat boiler comprises a steam generating system consisting of a sintering machine, a cooler and a sintering waste heat boiler, and a steam power generation system consisting of a steam-water separator, a steam turbine and a cooling tower. The steam generating system and the steam power generation system have at least two. The steam generated by the steam generating system flows to the steam power generation system in a steam main pipeline 1. A first steam connecting pipe 2 is arranged on the steam main pipeline 1 of the steam generating system. The output ends of the first steam connecting pipes 2 of two adjacent steam generating systems are respectively connected to a second steam connecting pipe 3. The steam enters the steam main pipeline 1 of the steam generating system on one side through the first steam connecting pipe 2 and the second steam connecting pipe 3.

[0067] Based on the above embodiments, the technical problem that the present application intends to solve is how to achieve the allocation of steam amounts when the amounts of steam generated by two steam generating systems are different. To this end, the present application uses a steam generating system composed of a sintering machine, a cooler and a sintering waste heat boiler. The flue gas and cooling waste gas generated by the sintering machine and the cooler form a large amount of steam after passing through the sintering waste heat boiler. The steam is transmitted to the steam power generation system through the steam main pipe 1. The steam power generation system composed of a steam-water separator, a steam turbine and a cooling tower uses the steam to generate electricity and utilizes the energy of the steam. The steam main pipes 1 of the two adjacent steam generating systems in this embodiment are connected by a first steam connecting pipe 2 and a second steam connecting pipe 3, so that the steam in the steam generating system that generates a high amount of steam can be transmitted to the steam generating system that generates a low amount of steam through the first steam connecting pipe 2 and the second steam connecting pipe 3. The steam flows into the steam main pipe 1 of the system so that the amount of steam entering the steam power generation system remains the same. The first steam connecting pipe 2 and the second steam connecting pipe 3 are closed to cut off the connection between the two steam main pipes 1, so that the steam of the two steam generating systems can be evenly distributed, which can effectively prevent the steam amount generated by a certain steam generating system from being greater than the rated steam amount of the steam power generation system, and the phenomenon that the excess steam must be released or used for other purposes to protect the safe operation of the steam turbine, thereby preventing energy waste, and can also effectively prevent the two steam power generation systems from operating at full load and at reduced load, thereby improving the utilization rate of recovered energy and reducing costs.

[0068] Further, such as Figure 3 As shown:

[0069] The input end of the steam main pipeline 1 is provided with a first air inlet 1a, and the first air inlet 1a is connected to the output end of the sintering waste heat boiler of the steam generation system.

[0070] Based on the above embodiments, the present application connects the output end of the sintering waste heat boiler of the steam generating system through the first air inlet 1a. Sintering generally adopts a dual-machine setting. The waste heat steam main pipelines of the two sintering machines are connected to the waste heat boiler with a Φ100-1000mm pipeline. The diameter of the connecting pipeline is selected according to the size of the sintering machine. The diameter of the first air inlet 1a is set according to the diameter of the connecting pipeline at the output end of the waste heat boiler. The steam generated in the waste heat boiler enters the steam main pipeline 1.

[0071] Further, such as Figure 2 , Fig. 9 and Fig.10 As shown:

[0072] The first air outlet 1b is provided at one end of the steam main pipe 1 away from the first air inlet 1a. The first air outlet 1b is hermetically connected to the input end of the air outlet pipe 1b1. The output end of the air outlet pipe 1b1 is connected to the input end of the steam-water separator of the steam power generation system.

[0073] Based on the above embodiments, the present application connects the input end of the steam-water separator of the steam power generation system through the first air outlet 1b on the steam main pipe 1 in conjunction with the air outlet pipe 1b1, so that the steam generated by the steam generation system can be directed into the steam-water separator of the steam power generation system for processing, thereby causing a large amount of water vapor to enter the steam turbine and affect the service life of the components of the steam turbine. The connection between the first air outlet 1b and the air outlet pipe 1b1 and the connection between the air outlet pipe 1b1 and the steam-water separator remain closed to prevent steam leakage.

[0074] Further, such as Figure 3 As shown:

[0075] A second air outlet 1c is also provided on the steam main pipeline 1. The second air outlet 1c is located between the first air inlet 1a and the first air outlet 1b. The second air outlet 1c is connected to the input end of the first steam connecting pipe 2 through a pressure control unit 1c1. The pressure control unit 1c1 is used to control the steam entering the first steam connecting pipe 2.

[0076] Based on the above embodiments, the technical problem that the present application intends to solve is how the steam in the steam main pipeline 1 enters the first steam connecting pipe 2. To this end, the steam in the steam main pipeline 1 of the present application flows out through the second air outlet 1c set between the first air inlet 1a and the first air outlet 1b, and the pressure control unit 1c1 controls the opening and closing of the second air outlet 1c. When the pressure control unit 1c1 is turned on, the steam in the steam main pipeline 1 enters the steam main pipeline 1 of another steam generating system through the first steam connecting pipe 2 and the second steam connecting pipe 3 to achieve steam allocation. When the pressure control unit 1c1 is turned off, the connection between the steam main pipelines 1 of the two steam generating systems is cut off.

[0077] Further, such as Figures 6 to 8 As shown:

[0078] The pressure control unit 1c1 includes a first safety valve 2a fixedly installed at the connection between the second air outlet 1c and the input end of the first steam connecting pipe 2. The input end of the valve chamber 2a1 in the first safety valve 2a is tightly connected to the second air outlet 1c through a bracket 2a2. The cross-sectional diameter of the valve chamber 2a1 expands from the input end to the output end. A valve core 2a3 is arranged in the valve chamber 2a1. A spring 2a4 is coaxially inserted on the valve core 2a3. The spring 2a4 blocks the input end of the valve chamber 2a1. 2a5 sleeved on the valve core 2a3 elastically connects the valve core 2a3 and the spring 2a4. The spring 2a4 moves along the axial direction of the valve chamber 2a1.

[0079] Based on the above embodiments, the technical problem that the present application intends to solve is how the pressure control unit 1c1 controls the opening and closing of the second gas outlet 1c. To this end, the first embodiment of the present application closes the connection between the second gas outlet 1c and the first steam connecting pipe 2 through the first safety valve 2a. The first safety valve 2a uses a spring 2a4 to provide mechanical thrust to make the valve core 2a3 block the valve cavity 2a1 input end of the first safety valve 2a. When the steam pressure in the steam main pipeline 1 is higher than a certain value, the steam pushes the valve core 2a3 along the axial direction of the valve cavity 2a1, so that the valve cavity 2a1 is unblocked, and the steam enters the first steam connecting pipe 2 from the second gas outlet 1c to complete the steam allocation. This embodiment can complete the automatic allocation of steam during the operation of the steam generation system. The rated steam of the steam generation system can be adjusted by adjusting the elastic coefficient of the valve core 2a3.

[0080] Further, such as Fig. 9 and 10 As shown:

[0081] The pressure control unit 1c1 includes a first solenoid valve 2b fixedly installed at the connection between the second air outlet 1c and the input end of the first steam connecting pipe 2. A pressure gauge 1d is provided on the air outlet pipe 1b1 of the steam main pipe 1. The pressure gauge 1d detects the steam pressure value in the steam main pipe 1. The signal of the pressure gauge 1d is connected to the first solenoid valve 2b. The pressure gauge 1d controls the switch of the first solenoid valve 2b.

[0082] Based on the above embodiments, the technical problem that the present application intends to solve is how the pressure control unit 1c1 controls the opening and closing of the second air outlet 1c. To this end, the second embodiment of the present application closes the connection between the second air outlet 1c and the first steam connecting pipe 2 by means of the first solenoid valve 2b. The opening of the first solenoid valve 2b is controlled by the signal of the pressure gauge 1d. The pressure gauge 1d detects the amount of steam entering the steam power generation system. The pressure gauge 1d can be connected to the control module to set the rated steam amount. When the pressure gauge 1d detects that the amount of steam entering the steam power generation system is higher than the rated value, a signal is sent to open the first solenoid valve 2b, so that the steam enters the first steam connecting pipe 2 from the second air outlet 1c for steam allocation. This method can adapt to the changes in the waste heat parameters of the flue gas, making the entire system highly adaptable and reliable.

[0083] Further, such as Figure 4 and 5 As shown:

[0084] The second steam connecting pipe 3 includes a first branch pipe 3a and a second branch pipe 3b, the axes of the first branch pipe 3a and the second branch pipe 3b are parallel to each other, the two ends of the first branch pipe 3a and the second branch pipe 3b are respectively connected to the main pipe 3c, a connecting port 3c1 is arranged at the center of the main pipe 3c, and the two connecting ports 3c1 of the second steam connecting pipe 3 are respectively fixedly connected to one end of the first steam connecting pipe 2 away from the second air outlet 1c through a connecting flange 3c2.

[0085] The first branch pipe 3a and the second branch pipe 3b are both provided with a second one-way valve 3d, and the output end of the second one-way valve 3d on the first branch pipe 3a is arranged opposite to the output end of the second one-way valve 3d on the second branch pipe 3b.

[0086] Based on the above embodiments, the technical problem that the present application aims to solve is how the second steam connecting pipe 3 can realize the bidirectional flow of steam in the steam main pipes 1 of the two steam generating systems. To this end, the second steam connecting pipe 3 of the present application is fixedly connected to one end of the first steam connecting pipe 2 through the connecting port 3c1 of the main pipe 3c, so that the steam in the first steam connecting pipe 2 can enter the second steam connecting pipe 3, and the two ends of the main pipe 3c are respectively connected to the first branch pipe 3a and the second branch pipe 3b. The two reverse second one-way valves 3d arranged on the first branch pipe 3a and the second branch pipe 3b make it possible for the steam entering the second steam connecting pipe 3 from the first steam connecting pipe 2 of the steam generating system on one side to only enter the first steam connecting pipe 2 on the other side in a single direction through the first branch pipe 3a or the second branch pipe 3b. The staff can open and close the second one-way valve 3d on the first branch pipe 3a or the second branch pipe 3b according to the steam generation amount of the two steam generating systems, so that the steam can only move to the other side through the first branch pipe 3a or the second branch pipe 3b and cannot flow back. When the steam generation amount of the steam generating systems on both sides changes, there is no need to reinstall the second one-way valve 3d, and it is only necessary to reselect the second one-way valve 3d to open in different directions.

[0087] Further, such as Figure 3 , Fig. 9 and Fig.10 As shown:

[0088] A connecting branch pipe 2c is provided at one end of the first steam connecting pipe 2 facing the steam main pipeline 1, the input end of the connecting branch pipe 2c is arranged on the lower side of the connection position between the first steam connecting pipe 2 and the second air outlet 1c, the output end of the connecting branch pipe 2c is tightly connected to the second air inlet 1e on the steam main pipeline 1, the second air inlet 1e is arranged between the first air inlet 1a and the first air outlet 1b, and a first one-way valve 2c1 is provided at the connection between the connecting branch pipe 2c and the second air inlet 1e.

[0089] The input end of the first one-way valve 2c1 is connected to the output end of the connecting branch pipe 2c, and the output end of the first one-way valve 2c1 is connected to the second air inlet 1e of the steam main pipeline 1.

[0090] Based on the above embodiments, the technical problem that the present application intends to solve is how the steam enters the steam main pipeline 1 from the first steam connecting pipe 2 when the pressure control unit 1c1 is closed. To this end, the present application sets a connecting branch pipe 2c at one end of the first steam connecting pipe 2 to connect to the second air inlet 1e of the steam main pipeline 1, and the steam flowing into the first steam connecting pipe 2 from the second steam connecting pipe 3 enters the steam main pipeline 1 through the connecting branch pipe 2c, thereby completing the steam allocation without opening the pressure control unit 1c1, preventing the steam in the steam main pipeline 1 from entering the first steam connecting pipe 2 when the pressure control unit 1c1 is opened, causing a certain loss, and affecting the efficiency of steam allocation. A first one-way valve 2c1 is set at the connection between the connecting branch pipe 2c and the second air inlet 1e. The first one-way valve 2c1 ensures that the steam in the first steam connecting pipe 2 can only enter the steam main pipeline 1 in one direction, and the steam in the steam main pipeline 1 cannot flow back into the first steam connecting pipe 2, thereby providing a guarantee for the steam allocation effect.

[0091] Furthermore, the steam-water separator is provided with a steam-water detection device for:

[0092] Collecting working information of the steam-water separator;

[0093] Analyze the working information, and determine whether the steam-water separator has completed the separation work according to the analysis result;

[0094] If yes, generating a first preset light with a first brightness and utilizing the first preset light to illuminate the steam power generation system;

[0095] Acquire a first inspection light reflected by the steam power generation system;

[0096] Respectively transmitting the first preset light and the first inspection light to a preset waveform display model to perform waveform display work, and obtaining corresponding first waveforms and second waveforms;

[0097] Acquire a plurality of first peaks contained in the first waveform and a plurality of second peaks contained in the second waveform;

[0098] extracting a maximum peak value of the first waveform from among the first peak values;

[0099] respectively calculating the peak ratio between each second peak and the maximum peak;

[0100] Obtaining all peak ratios for discrete analysis to obtain the discreteness of the peak ratios, and determining that steam-water is residual in the steam power generation system when the discreteness is not within a preset discreteness range;

[0101] After determining that steam and water remain in the steam power generation system, generating a second preset light of a second brightness and using the second preset light to illuminate the steam power generation system;

[0102] Acquire a second inspection light reflected by the steam power generation system;

[0103] Inputting the second preset light and the second test light into a preset grating model respectively to perform light diffraction work to obtain a corresponding standard spectrum and test spectrum;

[0104] Performing wavelength classification on the standard spectrum and the test spectrum respectively to obtain a first wavelength set and a second wavelength set;

[0105] The first wavelength set is regarded as a standard set, and is mapped with the second wavelength set to obtain a mapping result.

[0106] Analyze the mapping result, extract the target second wavelength that failed to be mapped, and mark the abnormal area corresponding to the target second wavelength on the inspection spectrum;

[0107] Inputting the standard spectrum and the marked test spectrum into the same coordinate system, marking a target area corresponding to the abnormal area on the standard spectrum;

[0108] Comparing the target area with the abnormal area to obtain a plurality of contrasting outliers contained in the abnormal area;

[0109] According to the number of the contrasting outliers, the amount of steam and water remaining in the steam power generation system is queried in a preset quantity-concentration list, and when the amount of steam and water remaining is greater than a preset residual amount threshold, a reminder message is generated and displayed.

[0110] In this example, the working information indicates the progress of the steam-water separator when it is working;

[0111] In this example, the first inspection light is the light reflected by the steam power generation system after the first preset light is irradiated onto the steam power generation system;

[0112] In this example, the preset waveform display model may be a virtual waveform display;

[0113] In this example, the peak value indicates the waveform value corresponding to the point where the waveform direction suddenly changes from rising to falling in a waveform;

[0114] In this example, the maximum peak value indicates the largest first peak value;

[0115] In this example, the contrast outliers represent the differences between the test spectrum and the standard spectrum;

[0116] In this example, the preset quantity-concentration list indicates a comparison list recording the quantity of different contrasting outliers and the water vapor concentration.

[0117] The working principle of the above technical solution is: first, after the steam-water separator completes the separation work, the first preset light is used to irradiate the steam power generation system, and the discreteness of the maximum peak ratio of the first test light reflected by the steam power generation system to the preset first light is used to determine whether there is steam-water residue in the steam power generation system. Then, the second preset light is used to irradiate the steam power generation system, and the second test light reflected by the steam power generation system and the first preset light are subjected to spectral analysis to obtain different points on the spectrum. Finally, the amount of steam-water residue is further obtained based on the number of different points, and a reminder message is generated when necessary.

[0118] The beneficial effects of the above technical solution are: in order to ensure the dryness of the steam power generation system, after the steam-water separator completes the steam-water separation work, it is irradiated with a first preset light to analyze whether there is any steam-water residue in the steam power generation system, and then further irradiated with a second preset light to analyze the amount of steam-water residue in the steam power generation system, and when necessary, a reminder message is generated to remind relevant personnel to pay attention to power generation safety, and to deal with residual steam and water in a timely manner to ensure system operation and improve power generation efficiency.

[0119] Furthermore, the cooler is provided with a control device for controlling the cooler to cool the sintering chamber of the sintering machine, specifically:

[0120] Acquiring material parameters of the sintering chamber, and determining a heat absorption coefficient and a heat transfer coefficient of the sintering chamber according to the material parameters;

[0121] Detecting the internal temperature of the sintering chamber after the sintering chamber is finished working and the external temperature of the sintering chamber, and calculating the temperature difference according to the internal temperature and the external temperature;

[0122] detecting a gas density of the steam generated in the sintering chamber, and determining an adiabatic index of the steam generated according to the gas density;

[0123] The heat transfer of the sintering chamber is calculated based on the adiabatic index and temperature difference of the generated steam and the heat absorption coefficient and heat transfer coefficient of the sintering chamber:

[0124]

[0125] Wherein, P represents the heat transfer of the sintering chamber, K represents the heat transfer coefficient of the sintering chamber, A represents the heat conduction area inside the sintering chamber, s represents the surface area of ​​the sintering chamber, s1 represents the working area area of ​​the sintering chamber, E represents the heat absorption coefficient of the sintering chamber, M represents the heat diffusion factor of the inner wall of the sintering chamber, k represents the adiabatic index of the generated steam, a represents the flow velocity coefficient of the generated steam in the sintering chamber, ln represents the natural logarithm, F1 represents the steam pressure inside the sintering chamber, F2 represents the atmospheric pressure outside the sintering chamber, and B represents the temperature difference;

[0126] The optimal cooling temperature of the sintering chamber for the cooler is calculated according to the heat transfer of the sintering chamber:

[0127]

[0128] Wherein, Q represents the optimal cooling temperature of the cooler for the sintering chamber, Q1 represents the lowest cooling temperature of the cooler, P1 represents the reference threshold of the heat transfer of the sintering chamber at room temperature, q represents the maximum effect factor of the relative cold air flow at the lowest cooling temperature of the cooler, l represents the inner wall thickness of the sintering chamber, s2 represents the heating area of ​​the sintering chamber, v1 represents the internal volume of the sintering chamber, x represents the dryness coefficient of the space where the sintering chamber is located, y represents the indirect evaporative cooling efficiency of the cooler at the lowest cooling temperature, i represents the distance between the cooler and the sintering chamber, d represents the maximum action range of the cooler, and v1 represents the overall volume of the sintering chamber;

[0129] The cooler is controlled to cool the sintering chamber at the optimal refrigeration temperature, and the cooler is turned off when the heat transfer of the sintering chamber is less than or equal to a reference threshold of the heat transfer of the sintering chamber at room temperature.

[0130] The beneficial effects of the above technical solution are as follows: by calculating the heat transfer of the sintering chamber, its heat transfer can be comprehensively determined according to the working parameters, material parameters and natural parameters of the sintering chamber, so that the calculation result is more objective and practical, which lays an effective data reference foundation for subsequent cooling work. Furthermore, by calculating the optimal cooling temperature of the cooler for the sintering chamber, it can avoid excessive waste of electric energy and maximize the use of the function of the cooler to achieve equipment cooling, which improves the cooling efficiency and prolongs the service life of the coolant to a certain extent. At the same time, the optimal cooling solution is reasonably planned according to the position and volume parameters of the sintering chamber, which further improves the cooling efficiency.

[0131] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A control device for directional steam allocation of a sintering waste heat boiler, comprising a steam generation system consisting of a sintering machine, a cooler and a sintering waste heat boiler, and a steam power generation system consisting of a steam-water separator, a steam turbine and a cooling tower, wherein the steam generation system and the steam power generation system have at least two, characterized in that: The steam generated by the steam generating system flows in a steam main pipe (1) to a steam power generation system. A first steam connecting pipe (2) is provided on the steam generating system's steam main pipe (1). The output ends of the first steam connecting pipes (2) of two adjacent steam generating systems are respectively connected to second steam connecting pipes (3). The steam flows from the steam main pipe (1) of the steam generating system on one side through the first steam connecting pipe (2) and the second steam connecting pipe (3) into the steam main pipe (1) of the other steam generating system. The input end of the steam main pipeline (1) is provided with a first air inlet (1a), and the first air inlet (1a) is connected to the output end of the sintering waste heat boiler of the steam generation system; the end of the steam main pipeline (1) away from the first air inlet (1a) is provided with a first air outlet (1b), the first air outlet (1b) is sealedly connected to the input end of the air outlet pipeline (1b1), and the output end of the air outlet pipeline (1b1) is connected to the input end of the steam-water separator of the steam power generation system; The steam main pipe (1) is also provided with a second air outlet (1c), the second air outlet (1c) being located between the first air inlet (1a) and the first air outlet (1b), the second air outlet (1c) being connected to the input end of the first steam connecting pipe (2) via a pressure control unit (1c1), the pressure control unit (1c1) being used to control the steam to enter the first steam connecting pipe (2); The second steam connecting pipe (3) comprises a first branch pipe (3a) and a second branch pipe (3b), the axes of the first branch pipe (3a) and the second branch pipe (3b) are parallel to each other, the two ends of the first branch pipe (3a) and the second branch pipe (3b) are respectively connected to the main pipe (3c), a connecting port (3c1) is provided at the center of the main pipe (3c), and the two connecting ports (3c1) of the second steam connecting pipe (3) are respectively fixedly connected to an end of the first steam connecting pipe (2) away from the second gas outlet (1c) through connecting flanges (3c2); The first branch pipe (3a) and the second branch pipe (3b) are both provided with a second one-way valve (3d), and the output end of the second one-way valve (3d) on the first branch pipe (3a) is arranged in the opposite direction to the output end of the second one-way valve (3d) on the second branch pipe (3b); A connecting branch pipe (2c) is provided at one end of the first steam connecting pipe (2) facing the steam main pipe (1); the input end of the connecting branch pipe (2c) is arranged at the lower side of the connection position between the first steam connecting pipe (2) and the second air outlet (1c); the output end of the connecting branch pipe (2c) is sealedly connected to the second air inlet (1e) on the steam main pipe (1); the second air inlet (1e) is arranged between the first air inlet (1a) and the first air outlet (1b); a first non-return valve (2c1) is provided at the connection between the connecting branch pipe (2c) and the second air inlet (1e); the input end of the first non-return valve (2c1) is connected to the output end of the connecting branch pipe (2c); and the output end of the first non-return valve (2c1) is connected to the second air inlet (1e) of the steam main pipe (1).

2. The control device for directional steam allocation of a sintering waste heat boiler according to claim 1 is characterized in that: The pressure control unit (1c1) comprises a first safety valve (2a) fixedly mounted at the connection between the second gas outlet (1c) and the input end of the first steam connecting pipe (2); the input end of the valve chamber (2a1) in the first safety valve (2a) is hermetically connected to the second gas outlet (1c) via a bracket (2a2); the cross-sectional diameter of the valve chamber (2a1) increases from the input end to the output end; a valve core (2a3) is arranged in the valve chamber (2a1); a spring (2a4) is coaxially inserted on the valve core (2a3); the spring (2a4) blocks the input end of the valve chamber (2a1); a valve core (2a5) sleeved on the valve core (2a3) elastically connects the valve core (2a3) and the spring (2a4); the spring (2a4) moves along the axial direction of the valve chamber (2a1).

3. The control device for directional steam allocation of a sintering waste heat boiler according to claim 1 is characterized in that: The steam-water separator is provided with a steam-water detection device for: Collecting working information of the steam-water separator; Analyze the working information, and determine whether the steam-water separator has completed the separation work according to the analysis result; If yes, generating a first preset light with a first brightness and utilizing the first preset light to illuminate the steam power generation system; Acquire a first inspection light reflected by the steam power generation system; Respectively transmitting the first preset light and the first inspection light to a preset waveform display model to perform waveform display work, and obtaining corresponding first waveforms and second waveforms; Acquire a plurality of first peaks contained in the first waveform and a plurality of second peaks contained in the second waveform; extracting a maximum peak value of the first waveform from among the first peak values; respectively calculating the peak ratio between each second peak and the maximum peak; Obtaining all peak ratios for discrete analysis to obtain the discreteness of the peak ratios, and determining that steam-water is residual in the steam power generation system when the discreteness is not within a preset discreteness range; After determining that steam and water remain in the steam power generation system, generating a second preset light of a second brightness and using the second preset light to illuminate the steam power generation system; Acquire a second inspection light reflected by the steam power generation system; Inputting the second preset light and the second test light into a preset grating model respectively to perform light diffraction work to obtain a corresponding standard spectrum and test spectrum; Performing wavelength classification on the standard spectrum and the test spectrum respectively to obtain a first wavelength set and a second wavelength set; The first wavelength set is regarded as a standard set, and is mapped with the second wavelength set to obtain a mapping result. Analyze the mapping result, extract the target second wavelength that failed to be mapped, and mark the abnormal area corresponding to the target second wavelength on the inspection spectrum; Inputting the standard spectrum and the marked test spectrum into the same coordinate system, marking a target area corresponding to the abnormal area on the standard spectrum; Comparing the target area with the abnormal area to obtain a plurality of contrasting outliers contained in the abnormal area; According to the number of the contrasting outliers, the amount of steam and water remaining in the steam power generation system is queried in a preset quantity-concentration list, and when the amount of steam and water remaining is greater than a preset residual amount threshold, a reminder message is generated and displayed.

4. The control device for directional steam allocation of a sintering waste heat boiler according to claim 1, characterized in that: The pressure control unit (1c1) comprises a first solenoid valve (2b) fixedly mounted at the connection between the second gas outlet (1c) and the input end of the first steam connecting pipe (2); a pressure gauge (1d) is arranged on the gas outlet pipe (1b1) of the steam main pipe (1); the pressure gauge (1d) detects the steam pressure value in the steam main pipe (1); the pressure gauge (1d) is connected to the first solenoid valve (2b) through a signal; and the pressure gauge (1d) controls the switch of the first solenoid valve (2b).

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