Intelligent preheating system and preheating control method for sintering mixture

Abstract

The application provides a sintering mixture intelligent preheating system and a preheating control method. The system has multiple moisture detection points, temperature detection points, weighing points and flow detection points arranged on a primary mixer feeding belt conveyor, a primary mixer cold water pipe, a primary mixer hot water pipe, a secondary mixer feeding belt conveyor, a secondary mixer cold water pipe, a secondary mixer hot water pipe, a secondary mixer steam pipe, a sintering machine mixture feeding belt conveyor, a sintering machine mixture mine slot steam pipe and a sintering machine trolley. In combination with various intelligent preheating system modules, the system can automatically adjust the hot water and steam quantity for sintering mixture preheating according to actual production conditions, realize intelligent control, reasonably allocate the hot water and steam quantity, meet the production requirements, reduce energy waste and improve the production environment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sintering process, and particularly relates to an intelligent preheating system for sintering mixture and a preheating control method. BACKGROUND

[0002] The preheating process of sintering mixture can save sintering fuel and improve the quality of sinter. The existing preheating of sintering mixture generally includes two parts: hot water added in the mixing machine and steam preheating, and steam preheating of the sintering machine mixture bin. Generally, the production water added in the cylinder of the primary mixing machine uses hot water; the production water added in the cylinder of the secondary mixing machine uses hot water, and steam is further introduced into the cylinder to further increase the temperature of the material; steam is continuously introduced into the sintering machine mixture bin to increase the temperature of the material. Since the amount of hot water and steam for preheating cannot be reasonably and intelligently adjusted according to the actual production conditions, a large amount of excess heat steam is emitted from the preheated material above the discharge belt conveyor of the primary mixing machine and the secondary mixing machine during operation, causing water mist to surround the internal passage of the belt conveyor, deteriorating the production environment, and the forced exhaust mode of installing an axial flow fan on the top of the passage cannot fundamentally solve the problem. A large amount of excess heat steam is also emitted from the top discharge port of the sintering chamber mixture bin, causing a large amount of water vapor to diffuse in the area of the sintering chamber, which requires the installation of a wet dust collector on the top of the workshop and the installation of an axial flow fan on the wall of the workshop to solve the water vapor problem, which is costly and requires a large space. These problems have existed and have not been taken seriously. The reasons are as follows: first, the source of the added hot water and steam is generally the hot waste gas from the ring cooler, and the amount of hot waste gas is large, so the cost of preparing hot water and steam is not high; second, the energy-saving and production-increasing effect of preheating the mixture is still higher than the cost of improving the production environment. However, with the increasing attention of the state and the industry to the production environment of industrial enterprises, many places have proposed green development and comprehensive creation of A for the steel industry, and the negative problems caused by the preheating of sintering mixture need to be solved. In addition, under the background of "double carbon", the technology of step-by-step utilization of hot waste gas from the ring cooler is continuously promoted, and the reasonable utilization of hot water and steam has become one of the problems to be solved in the field. SUMMARY

[0003] In order to overcome the deficiencies in the prior art, the present application provides an intelligent preheating system for sintering mixture and a preheating control method, which can automatically adjust the amount of hot water and steam for preheating sintering mixture according to the actual production conditions, reasonably adjust the amount of hot water and steam, and solve the problem of deterioration of the production environment caused by excess hot water and steam for preheating sintering mixture.

[0004] The technical scheme adopted by the present application to solve its technical problems is: an intelligent preheating system for sintering mixture, comprising:

[0005] The temperature measuring point a, the weighing point a, and the moisture detection point a are arranged on the primary mixer feeding belt conveyor, the flow detection point a is arranged on the primary mixer cold water pipe, and the flow detection point b is arranged on the primary mixer hot water pipe;

[0006] The temperature measuring point b, the weighing point b, and the moisture detection point b are arranged on the secondary mixer feeding belt conveyor, the flow detection point c is arranged on the secondary mixer cold water pipe, the flow detection point d is arranged on the secondary mixer hot water pipe, and the flow detection point e is arranged on the secondary mixer steam pipe;

[0007] The temperature measuring point c, the weighing point c, and the moisture detection point c are arranged on the sintering machine mixture feeding belt conveyor, the flow detection point f is arranged on the sintering machine mixture mine slot steam pipe, and the temperature measuring point d is arranged on the sintering machine trolley;

[0008] The primary mixer intelligent preheating system module is electrically connected with the primary mixer cold water pipe flow regulating valve and the primary mixer hot water pipe flow regulating valve to control the primary mixer cold water pipe flow regulating valve and the primary mixer hot water pipe flow regulating valve, the secondary mixer intelligent preheating system module is electrically connected with the secondary mixer cold water pipe flow regulating valve, the secondary mixer hot water pipe flow regulating valve, and the secondary mixer steam pipe flow regulating valve to control the secondary mixer cold water pipe flow regulating valve, the secondary mixer hot water pipe flow regulating valve, and the secondary mixer steam pipe flow regulating valve, and the mixture mine slot intelligent preheating system module is electrically connected with the sintering machine mixture mine slot steam pipe flow regulating valve to control the sintering machine mixture mine slot steam pipe flow regulating valve.

[0009] Further, the temperature measuring point a, the temperature measuring point b, and the temperature measuring point c are arranged in the middle of the primary mixer feeding belt conveyor, the secondary mixer feeding belt conveyor, and the sintering machine mixture feeding belt conveyor, and the temperature measuring point d is arranged in the middle of the sintering machine trolley close to the sintering machine mixture mine slot discharge port position; each of the above temperature measuring points adopts a non-contact infrared temperature measuring mode.

[0010] Further, the weighing point a, the weighing point b, and the weighing point c are arranged in the middle of the primary mixer feeding belt conveyor, the secondary mixer feeding belt conveyor, and the sintering machine mixture feeding belt conveyor; each of the above weighing points adopts a metering scale weighing mode.

[0011] A sintering mixture intelligent preheating control method, using the above system, includes the following steps:

[0012] Step 1: before the system starts, input the expected total moisture content W(%) of the mixture, input the total water added to the primary mixer 1 as a percentage of the total water added to the mixture P1(%), and obtain the total water added to the primary mixer cold water pipe and the primary mixer hot water pipe, and the total water added to the secondary mixer cold water pipe and the secondary mixer hot water pipe according to the weighing point a detection value G1 and the moisture detection point a detection value W0;

[0013] Step 2: during the system startup phase, adjust the primary mixer cold water pipe flow regulating valve to the minimum, so that the flow detection point a detection value V1 = 0, and adjust the primary mixer hot water pipe flow regulating valve to the maximum;

[0014] adjust the secondary mixer cold water pipe flow regulating valve to the minimum, so that the flow detection point c detection value V3 = 0, and adjust the secondary mixer hot water pipe flow regulating valve to the maximum;

[0015] adjust the secondary mixer steam pipe flow regulating valve to the minimum, so that the flow detection point e detection value V5 = 0, and adjust the sintering machine mixture bunker steam pipe flow regulating valve to the minimum, so that the flow detection point f detection value V6 = 0;

[0016] Step 3: the primary mixer intelligent preheating system module adjusts the primary mixer cold water pipe flow regulating valve and the primary mixer hot water pipe flow regulating valve according to the change of the temperature measurement point b detection value T2, so that the detection value T2 tends to be stable, and the adjustment stops;

[0017] Step 4: the secondary mixer intelligent preheating system module adjusts the secondary mixer cold water pipe flow regulating valve, the secondary mixer hot water pipe flow regulating valve and the secondary mixer steam pipe flow regulating valve according to the change of the temperature measurement point c detection value T3, so that the detection value T3 tends to be stable, and the adjustment stops;

[0018] Step 5: gradually increase the secondary mixer steam pipe flow regulating valve, when the detection value T3 reaches the maximum, slightly decrease the secondary mixer steam pipe flow regulating valve, when the detection value T3 decreases, slightly increase the secondary mixer steam pipe flow regulating valve…… so as to make the detection value T3 tend to be stable, and the adjustment stops;

[0019] Step 6: the mixture bunker intelligent preheating system module adjusts the sintering machine mixture bunker steam pipe flow regulating valve according to the change of the temperature measurement point d detection value T4, so that the detection value T4 tends to be stable, and the adjustment stops.

[0020] Further, the specific calculation method of the total water added to the primary mixer cold water pipe and the primary mixer hot water pipe, and the total water added to the secondary mixer cold water pipe and the secondary mixer hot water pipe in step 1 is:

[0021] According to the weighing point a detection value G1 and the moisture detection point a detection value W0, the mixed dry material amount G0 (t / h) is calculated:

[0022] G0 = (1 - (W0 / 100)) * G1

[0023] The total amount of water added to the primary mixer cold water pipe and the primary mixer hot water pipe is:

[0024] V1 + V2 = G0 * (W / 100) * (P1 / 100)

[0025] Wherein V1 is the flow detection point a detection value, and V2 is the flow detection point b detection value;

[0026] The total amount of water added to the secondary mixer cold water pipe and the secondary mixer hot water pipe is:

[0027] V3 + V4 = G0 * (W / 100) - G2 * (W1 / 100)

[0028] Wherein V3 is the flow detection point c detection value, V4 is the flow detection point d detection value, G2 is the weighing point b detection value, and W1 is the moisture detection point b detection value.

[0029] Further, the specific method of step 3 is: when the temperature measurement point b detection value T2 reaches the maximum value, gradually reduce the primary mixer hot water pipe flow regulating valve, gradually increase the primary mixer cold water pipe flow regulating valve, and keep V1 + V2 = G0 * (W / 100) * (P1 / 100); when the detection value T2 decreases, slightly increase the primary mixer hot water pipe flow regulating valve, and at the same time, slightly reduce the primary mixer cold water pipe flow regulating valve, and keep V1 + V2 = G0 * (W / 100) * (P1 / 100); when the detection value T2 increases, slightly reduce the primary mixer hot water pipe flow regulating valve, and at the same time, slightly increase the primary mixer cold water pipe flow regulating valve, and keep V1 + V2 = G0 * (W / 100) * (P1 / 100)…… so on and so forth, until the detection value T2 tends to be stable, stop adjusting, and record the weighing point a detection value G1, the temperature measurement point a detection value T1, the flow detection point a detection value V1 and the flow detection point b detection value V2 at this time as the commonly used values for storage.

[0030] Further, the specific method of step 4 is: close the secondary mixer steam pipe flow regulating valve, when the detection value T3 of the temperature measuring point c reaches the maximum value, gradually reduce the secondary mixer hot water pipe flow regulating valve, gradually increase the secondary mixer cold water pipe flow regulating valve, and keep V3+V4=G0*(W / 100)-G2*(W1 / 100); when the detection value T3 of the temperature measuring point c appears to decrease, slightly increase the secondary mixer hot water pipe flow regulating valve, and at the same time, slightly reduce the secondary mixer cold water pipe flow regulating valve, and keep V3+V4=G0*(W / 100)-G2*(W1 / 100); when the detection value T3 appears to increase, slightly reduce the secondary mixer hot water pipe flow regulating valve, and at the same time, slightly increase the secondary mixer cold water pipe flow regulating valve, and keep V3+V4=G0*(W / 100)-G2*(W1 / 100)……repeat the above steps until the detection value T3 tends to be stable, and stop adjusting.

[0031] Further, the specific method of step 6 is: gradually increase the sintering machine mixed material mine slot steam pipe flow regulating valve, when the detection value T4 of the temperature measuring point d reaches the maximum value, slightly reduce the sintering machine mixed material mine slot steam pipe flow regulating valve, when the detection value T4 appears to decrease, slightly increase the sintering machine mixed material mine slot steam pipe flow regulating valve……repeat the above steps until the detection value T4 tends to be stable, and stop adjusting, record the weighing point c detection value G3, the temperature measuring point c detection value T3 and the flow detection point f detection value V6 at this time as the commonly used values for storage.

[0032] Further, when the system is running, set the error range between the value of G2-G1 and the value of V1+V2, and the error range between the value of G3-G2 and the value of V3+V4, wherein G1 is the weighing point a detection value, G2 is the weighing point b detection value, V1 is the flow detection point a detection value, V2 is the flow detection point b detection value, G3 is the weighing point c detection value, V3 is the flow detection point c detection value, and V4 is the flow detection point d detection value.

[0033] When the error between the value of G2-G1 and the value of V1+V2 is greater than the set range, take the value of G2-G1 as the total amount of water added to the primary mixer cold water pipe and the primary mixer hot water pipe in step 1, issue an alarm and adjust the primary mixer cold water pipe flow regulating valve and the primary mixer hot water pipe flow regulating valve; continue to compare the value of G2-G1 and the value of V1+V2, when the error between the two is less than the set range, restore the original control;

[0034] When the error between the G3-G2 value and the V3+V4 value is greater than the set range, the G3-G2 value is taken as the total water adding amount of the secondary mixing machine cold water pipe and the secondary mixing machine hot water pipe in step 1, an alarm is sent, and the secondary mixing machine cold water pipe flow regulating valve and the secondary mixing machine hot water pipe flow regulating valve are adjusted; the comparison between the G3-G2 value and the V3+V4 value is continued, and when the error between the two is less than the set range, the original control is restored.

[0035] Further, when the system is running, the error range of the (G1*W0+V1+V2) / (G1+V1+V2)*100 value and the moisture detection point b detection value W1, and the error range of the (G2*W1+V3+V4) / (G2+V3+V4)*100 value and the moisture detection point c detection value W2 are set, wherein G1 is the weighing point a detection value, W0 is the moisture detection point a detection value, V1 is the flow detection point a detection value, V2 is the flow detection point b detection value, G2 is the weighing point b detection value, V3 is the flow detection point c detection value, and V4 is the flow detection point d detection value.

[0036] When the error between the (G1*W0+V1+V2) / (G1+V1+V2)*100 value and the moisture detection point b detection value W1 is greater than the set range, the (G1*W0+V1+V2) / (G1+V1+V2)*100 value is taken as the detection value W1 in step 1, an alarm is sent, and the secondary mixing machine cold water pipe flow regulating valve and the secondary mixing machine hot water pipe flow regulating valve are adjusted; the comparison between the (G1*W0+V1+V2) / (G1+V1+V2)*100 value and the detection value W1 is continued, and when the error between the two is less than the set range, the original control is restored.

[0037] When the error between the (G2*W1+V3+V4) / (G2+V3+V4)*100 value and the moisture detection point c detection value W2 is greater than the set range, an alarm is sent to remind checking the detection value W2, and the comparison between the (G2*W1+V3+V4) / (G2+V3+V4)*100 value and the detection value W2 is continued, and when the error between the two is less than the set range, the alarm is removed.

[0038] Compared with the prior art, the present application has the following beneficial effects:

[0039] (1) Based on the set multi-dimensional and multi-position detection points, and cooperating with each intelligent preheating system module, the amount of hot water and steam for sintering mixture preheating can be automatically adjusted according to the actual production status, and intelligent control can be realized.

[0040] (2) The hot water and steam consumption is reasonably allocated, which not only meets the production requirements, but also reduces energy waste.

[0041] (3) The detection points required by the system are set based on the original sintering production line structure, and no system equipment needs to be changed or added, so the investment is low;

[0042] (4) The system is provided with error detection, can realize alarm of failure of the regulating valve or detection point, and can maintain normal operation of the system to failure removal through the memory function;

[0043] (5) The problem of deterioration of the production environment caused by excess hot water and steam for preheating of the sintering mixture is solved, and the related investment for environmental improvement is saved. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is a whole detection setting diagram of the intelligent preheating system for the sintering mixture.

[0045] In the figure, 1 is a primary mixer, 2 is a secondary mixer, 3 is a primary mixer feeding belt conveyor, 4 is a secondary mixer feeding belt conveyor, 5 is a sintering machine mixture feeding belt conveyor, 6 is a sintering machine mixture mine slot, 7 is a primary mixer cold water pipe, 8 is a primary mixer hot water pipe, 9 is a secondary mixer cold water pipe, 10 is a secondary mixer hot water pipe, 11 is a secondary mixer steam pipe, 12 is a sintering machine mixture mine slot steam pipe, 13 is a primary mixer cold water pipe flow regulating valve, 14 is a primary mixer hot water pipe flow regulating valve, 15 is a secondary mixer cold water pipe flow regulating valve, 16 is a secondary mixer hot water pipe flow regulating valve, 17 is a secondary mixer steam pipe flow regulating valve, 18 is a sintering machine mixture mine slot steam pipe flow regulating valve, 19 is a temperature measuring point a, 20 is a temperature measuring point b, 21 is a temperature measuring point c, 22 is a temperature measuring point d, 23 is a flow detection point a, 24 is a flow detection point b, 25 is a flow detection point c, 26 is a flow detection point d, 27 is a flow detection point e, 28 is a flow detection point f, 29 is a weighing point a, 30 is a weighing point b, 31 is a weighing point c, 32 is a sintering machine trolley, 33 is a moisture detection point a, 34 is a moisture detection point b, and 35 is a moisture detection point c. DETAILED DESCRIPTION

[0046] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0047] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0048] Embodiment 1

[0049] The application relates to a sintering mixture intelligent preheating system, which relates to a sintering production line device comprising a primary mixer 1, a secondary mixer 2, a primary mixer feeding belt conveyor 3, a secondary mixer feeding belt conveyor 4, a sintering machine mixture feeding belt conveyor 5, a sintering machine mixture mine tank 6, a primary mixer cold water pipe 7, a primary mixer hot water pipe 8, a secondary mixer cold water pipe 9, a secondary mixer hot water pipe 10, a secondary mixer steam pipe 11, a sintering machine mixture mine tank steam pipe 12, a primary mixer cold water pipe flow regulating valve 13, a primary mixer hot water pipe flow regulating valve 14, a secondary mixer cold water pipe flow regulating valve 15, a secondary mixer hot water pipe flow regulating valve 16, a secondary mixer steam pipe flow regulating valve 17, a sintering machine mixture mine tank steam pipe flow regulating valve 18 and a sintering machine trolley 32.

[0050] Based on the above-mentioned production line devices, detection points are arranged as follows:

[0051] A temperature measuring point a19, a weighing point a29 and a moisture detection point a33 are arranged on the primary mixer feeding belt conveyor 3, a flow detection point a23 is arranged on the primary mixer cold water pipe 7, and a flow detection point b24 is arranged on the primary mixer hot water pipe 8;

[0052] A temperature measuring point b20, a weighing point b30 and a moisture detection point b34 are arranged on the secondary mixer feeding belt conveyor 4, a flow detection point c25 is arranged on the secondary mixer cold water pipe 9, a flow detection point d26 is arranged on the secondary mixer hot water pipe 10, and a flow detection point e27 is arranged on the secondary mixer steam pipe 11;

[0053] A temperature measuring point c21, a weighing point c31 and a moisture detection point c35 are arranged on the sintering machine mixture feeding belt conveyor 5, a flow detection point f28 is arranged on the sintering machine mixture mine tank steam pipe 12, and a temperature measuring point d22 is arranged on the sintering machine trolley 32;

[0054] Specifically, the temperature measuring point a19 is arranged in the middle of the primary mixer feeding belt conveyor 3 and adopts a non-contact infrared temperature measuring mode; the temperature measuring point b20 is arranged in the middle of the secondary mixer feeding belt conveyor 4 and adopts a non-contact infrared temperature measuring mode; the temperature measuring point c21 is arranged in the middle of the sintering machine mixture feeding belt conveyor 5 and adopts a non-contact infrared temperature measuring mode; and the temperature measuring point d22 is arranged in the middle of the sintering machine trolley 33 and is close to the discharge port of the sintering machine mixture mine tank 6, and adopts a non-contact infrared temperature measuring mode;

[0055] The flow detection point a23 is located on the cold water pipe 7 of the primary mixer; the flow detection point b24 is located on the hot water pipe 8 of the primary mixer; the flow detection point c25 is located on the cold water pipe 9 of the secondary mixer; the flow detection point d26 is located on the hot water pipe 10 of the secondary mixer; the flow detection point e27 is located on the steam pipe 11 of the secondary mixer; and the flow detection point f28 is located on the steam pipe 12 of the sintering machine mixture ore slot.

[0056] The weighing point a29 is located in the middle of the primary mixer feeding belt conveyor 3 and adopts a metering scale weighing method; the weighing point b30 is located in the middle of the secondary mixer feeding belt conveyor 4 and adopts a metering scale weighing method; and the weighing point c31 is located in the middle of the sintering machine mixture feeding belt conveyor 5 and adopts a metering scale weighing method.

[0057] The moisture detection point a33 is located in the middle of the primary mixer feeding belt conveyor 3; the moisture detection point b34 is located in the middle of the secondary mixer feeding belt conveyor 4; and the moisture detection point c35 is located in the middle of the sintering machine mixture feeding belt conveyor 5.

[0058] The primary mixer cold water pipe flow regulating valve 13 and the primary mixer hot water pipe flow regulating valve 14 are electrically connected with a primary mixer intelligent preheating system module for controlling the two; the secondary mixer cold water pipe flow regulating valve 15, the secondary mixer hot water pipe flow regulating valve 16 and the secondary mixer steam pipe flow regulating valve 17 are electrically connected with a secondary mixer intelligent preheating system module for controlling the three; and the sintering machine mixture ore slot steam pipe flow regulating valve 18 is electrically connected with a mixture ore slot intelligent preheating system module for controlling the same.

[0059] Based on the above embodiment, in order to be able to realize adaptive and reasonable allocation of hot water and steam usage according to the actual detection data of each detection point, there is a interlocking control relationship between each detection point and each valve, including: the interlocking relationship between the weighing point a29 and the primary mixer cold water pipe flow regulating valve 13 and the primary mixer hot water pipe flow regulating valve 14; the interlocking relationship between the weighing point b30 and the secondary mixer cold water pipe flow regulating valve 15, the secondary mixer hot water pipe flow regulating valve 16 and the secondary mixer steam pipe 17; the interlocking relationship between the weighing point c31 and the sintering machine mixture ore slot steam pipe flow regulating valve 18; the interlocking relationship between the temperature detection point a19 and the primary mixer cold water pipe flow regulating valve 13 and the primary mixer hot water pipe flow regulating valve 14; the interlocking relationship between the temperature detection point b20 and the secondary mixer cold water pipe flow regulating valve 15, the secondary mixer hot water pipe flow regulating valve 16 and the secondary mixer steam pipe 17; the interlocking relationship between the temperature detection point c21 and the sintering machine mixture ore slot steam pipe flow regulating valve 18; and the interlocking relationship between the temperature detection point d22 and the sintering machine mixture ore slot steam pipe flow regulating valve 18.

[0060] Example 2

[0061] Based on the device of example 1, the setting of detection points, this embodiment provides a sintering mixture intelligent preheating control method. In order to facilitate the understanding of the following description, first of all, the corresponding relationship between each detection point and detection value is written as a whole:

[0062] The flow detection point a23 detects the value V1, the flow detection point b24 detects the value V2, the flow detection point c25 detects the value V3, the flow detection point d26 detects the value V4, the flow detection point e27 detects the value V5, the flow detection point f28 detects the value V6; The temperature detection point a19 detects the value T1, the temperature detection point b20 detects the value T2, the temperature detection point c21 detects the value T3, and the temperature detection point d22 detects the value T4; The weighing point a29 detects the value G1, the weighing point b30 detects the value G2, and the weighing point c31 detects the value G3; The moisture detection point a33 detects the value W0, the moisture detection point b34 detects the value W1, and the moisture detection point c35 detects the value W2.

[0063] The method is realized according to the following steps:

[0064] Step 1, before the system starts, input the expected total moisture content W(%) of the mixture, input the total water addition amount of the primary mixer 1 accounting for the total water addition amount of the mixture P1(%)(set default value 80%), and according to the weighing point a29 detection value G1 and the moisture detection point a33 detection value W0, the dry material amount G0(t / h) of the mixture can be calculated and obtained:

[0065] G0=(1-(W0 / 100))*G1

[0066] Further, the total water addition amount of the primary mixer cold water pipe 7 and the primary mixer hot water pipe 8 is:

[0067] V1+V2=G0*(W / 100)*(P1 / 100)

[0068] The total water addition amount of the secondary mixer cold water pipe 9 and the secondary mixer hot water pipe 10 is:

[0069] V3+V4=G0*(W / 100)-G2*(W1 / 100)

[0070] Step 2, during the system startup phase, adjust the primary mixer cold water pipe flow regulating valve 13 to the minimum, so that V1=0, adjust the primary mixer hot water pipe flow regulating valve 14 to the maximum, that is:

[0071] V2=G0*(W / 100)*(P1 / 100)

[0072] Adjust the secondary mixer cold water pipe flow regulating valve 15 to the minimum, so that V3=0, and adjust the secondary mixer hot water pipe flow regulating valve 16 to the maximum, that is:

[0073] V4 = G0*(W / 100)-G2*(W1 / 100)

[0074] Adjust the secondary mixer steam pipe flow regulating valve 17 to the minimum, so that V5 = 0; adjust the sintering machine mixing material bin steam pipe flow regulating valve 18 to the minimum, so that V6 = 0;

[0075] Step 3, the primary mixer intelligent preheating system module adjusts the primary mixer cold water pipe flow regulating valve 13 and the primary mixer hot water pipe flow regulating valve 14 according to the change of the T2 value, and the specific method is: when the T2 value reaches the maximum, gradually reduce the primary mixer hot water pipe flow regulating valve 14, gradually increase the primary mixer cold water pipe flow regulating valve 13, and keep V1+V2=G0*(W / 100)*(P1 / 100); when the T2 value decreases, slightly increase the primary mixer hot water pipe flow regulating valve 14, and at the same time, slightly reduce the primary mixer cold water pipe flow regulating valve 13, and keep V1+V2=G0*(W / 100)*(P1 / 100); when the T2 value increases, slightly reduce the primary mixer hot water pipe flow regulating valve 14, and at the same time, slightly increase the primary mixer cold water pipe flow regulating valve 13, and keep V1+V2=G0*(W / 100)*(P1 / 100)……repeat the above process until the T2 value tends to be stable, stop adjusting, and record the G1 value, T1 value, V1 value and V2 value at this time as the commonly used value for storage;

[0076] Step 4, the secondary mixer intelligent preheating system module adjusts the secondary mixer cold water pipe flow regulating valve 15, the secondary mixer hot water pipe flow regulating valve 16 and the secondary mixer steam pipe flow regulating valve 17 according to the change of the T3 value, and the specific method is: close the secondary mixer steam pipe flow regulating valve 17, when the T3 value reaches the maximum, gradually reduce the secondary mixer hot water pipe flow regulating valve 16, gradually increase the secondary mixer cold water pipe flow regulating valve 15, and keep V3+V4=G0*(W / 100)-G2*(W1 / 100); when the T3 value decreases, slightly increase the secondary mixer hot water pipe flow regulating valve 16, and at the same time, slightly reduce the secondary mixer cold water pipe flow regulating valve 15, and keep V3+V4=G0*(W / 100)-G2*(W1 / 100); when the T3 value increases, slightly reduce the secondary mixer hot water pipe flow regulating valve 16, and at the same time, slightly increase the secondary mixer cold water pipe flow regulating valve 15, and keep V3+V4=G0*(W / 100)-G2*(W1 / 100)……repeat the above process until the T3 value tends to be stable, stop adjusting;

[0077] Step 5, gradually increase the secondary mixer steam pipe flow regulating valve 17, when the T3 value reaches the maximum, slightly reduce the secondary mixer steam pipe flow regulating valve 17, when the T3 value decreases, slightly increase the secondary mixer steam pipe flow regulating valve 17…… so on and so forth, the T3 value tends to be stable, stop adjusting, record the G2 value, T2 value, V3 value, V4 value and V5 value at this time, as the commonly used value storage;

[0078] Step 6, the mixing material bunker intelligent preheating system module adjusts the sintering machine mixing material bunker steam pipe flow regulating valve 18 according to the T4 value change, the specific method is: gradually increase the sintering machine mixing material bunker steam pipe flow regulating valve 18, when the T4 value reaches the maximum, slightly reduce the sintering machine mixing material bunker steam pipe flow regulating valve 18, when the T4 value decreases, slightly increase the sintering machine mixing material bunker steam pipe flow regulating valve 18…… so on and so forth, the T4 value tends to be stable, stop adjusting, record the G3 value, T3 value and V6 value at this time, as the commonly used value storage.

[0079] In order to ensure the reliable operation of the system, avoid the interference caused by invalid detection value, the method is provided with a detection value analysis process:

[0080] When the system is running, set the error range of G2-G1 value and V1+V2 value, take G2-G1 value as the comparison of V1+V2 value, when the error of the two is greater than the set range, take G2-G1 value as the total amount of water added to the primary mixer cold water pipe 7 and the primary mixer hot water pipe 8 in step 1, and alarm to remind checking the primary mixer cold water pipe flow regulating valve 13, the primary mixer hot water pipe flow regulating valve 14, the flow detection point a23 and the flow detection point b24; and adjust the primary mixer cold water pipe flow regulating valve 13 and the primary mixer hot water pipe flow regulating valve 14 by using the last group of commonly used values recorded in step 3; continue to compare G2-G1 value and V1+V2 value, when the error of the two is less than the set range, restore the original control.

[0081] When the system is running, set the error range of G3-G2 value and V3+V4 value, take G3-G2 value as the comparison of V3+V4 value, when the error of the two is greater than the set range, take G3-G2 value as the total amount of water added to the secondary mixer cold water pipe 9 and the secondary mixer hot water pipe 10 in step 1, and alarm to remind checking the secondary mixer cold water pipe flow regulating valve 15, the secondary mixer hot water pipe flow regulating valve 16, the flow detection point c25 and the flow detection point d26; and adjust the secondary mixer cold water pipe flow regulating valve 15 and the secondary mixer hot water pipe flow regulating valve 16 by using the last group of commonly used values recorded in step 5; continue to compare G3-G2 value and V3+V4 value, when the error of the two is less than the set range, restore the original control.

[0082] When the system is running, set the error range of (G1*W0+V1+V2) / (G1+V1+V2)*100 value and W1 value, take (G1*W0+V1+V2) / (G1+V1+V2)*100 value as the comparison of W1 value, when the error of the two is greater than the set range, take (G1*W0+V1+V2) / (G1+V1+V2)*100 value as W1 value in step 1, and alarm to check the moisture detection point b34; and adjust the secondary mixer cold water pipe flow regulating valve 15 and the secondary mixer hot water pipe flow regulating valve 16 with the last group of common values recorded in step 5; continue to compare (G1*W0+V1+V2) / (G1+V1+V2)*100 value and W1 value, when the error of the two is less than the set range, restore the original control.

[0083] When the system is running, set the error range of (G2*W1+V3+V4) / (G2+V3+V4)*100 value and W2 value, take (G2*W1+V3+V4) / (G2+V3+V4)*100 value as the comparison of W2 value, when the error of the two is greater than the set range, alarm to check the moisture detection point c35; continue to compare (G1*W0+V1+V2) / (G1+V1+V2)*100 value and W2 value, when the error of the two is less than the set range, remove the alarm.

[0084] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. Other different forms of changes or variations can be made on the basis of the above description for those skilled in the art. Here, all the embodiments need not and can not be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A smart preheating system for sintering mixtures, characterized in that, include: Temperature measuring point a (19), weighing point a (29), moisture detection point a (33) are set on the feed conveyor belt (3) of the primary mixer, and flow detection point a (23) is set on the cold water pipe (7) of the primary mixer, and flow detection point b (24) is set on the hot water pipe (8) of the primary mixer. It also includes a temperature measuring point b (20), a weighing point b (30), a moisture detection point b (34) set on the feed conveyor belt (4) of the secondary mixer, a flow detection point c (25) set on the cold water pipe (9) of the secondary mixer, a flow detection point d (26) set on the hot water pipe (10) of the secondary mixer, and a flow detection point e (27) set on the steam pipe (11) of the secondary mixer. It also includes a temperature measuring point c (21), a weighing point c (31), and a moisture detection point c (35) set on the sintering machine mixing feed conveyor (5), a flow detection point f (28) set on the sintering machine mixing ore trough steam pipe (12), and a temperature measuring point d (22) set on the sintering machine trolley (32); It also includes a primary mixer intelligent preheating system module electrically connected to the primary mixer cold water pipe flow regulating valve (13) and the primary mixer hot water pipe flow regulating valve (14) to control the primary mixer cold water pipe flow regulating valve (13) and the primary mixer hot water pipe flow regulating valve (14); a secondary mixer intelligent preheating system module electrically connected to the secondary mixer cold water pipe flow regulating valve (15), the secondary mixer hot water pipe flow regulating valve (16), and the secondary mixer steam pipe flow regulating valve (17) to control the secondary mixer cold water pipe flow regulating valve (15), the secondary mixer hot water pipe flow regulating valve (16), and the secondary mixer steam pipe flow regulating valve (17); and a sintering machine mixture ore trough intelligent preheating system module electrically connected to the sintering machine mixture ore trough steam pipe flow regulating valve (18) to control the sintering machine mixture ore trough steam pipe flow regulating valve (18).

2. The intelligent preheating system for sintering mixtures according to claim 1, characterized in that, Temperature measuring points a (19), b (20), and c (21) are each located in the middle of the primary mixer feed conveyor belt (3), the secondary mixer feed conveyor belt (4), and the sintering machine mixture feed conveyor belt (5). Temperature measuring point d (22) is located in the middle of the sintering machine trolley (32) adjacent to the outlet of the sintering machine mixture trough (6). All the above temperature measuring points adopt non-contact infrared temperature measurement.

3. The intelligent preheating system for sintering mixtures according to claim 1, characterized in that, The weighing points a (29), b (30), and c (31) are each located in the middle of the primary mixer feed conveyor belt (3), the secondary mixer feed conveyor belt (4), and the sintering machine mixed material feed conveyor belt (5). All of the above weighing points are weighed using a weighing scale.

4. A method for intelligent preheating control of sintering mixtures, using the system described in any one of claims 1-3, characterized in that, Includes the following steps: Step 1: Before starting the system, input the expected total moisture content W of the mixture, in %; input the ratio P1 of the total water added by the primary mixer (1) to the total water added by the mixture, in %; based on the detection value G1 of the weighing point a (29) and the detection value W0 of the moisture detection point a (33), obtain the total water added by the cold water pipe (7) and hot water pipe (8) of the primary mixer, as well as the total water added by the cold water pipe (9) and hot water pipe (10) of the secondary mixer; Step 2: During the system startup phase, adjust the flow regulating valve (13) of the cold water pipe of the primary mixer to the minimum, so that the detection value V1 of the flow detection point a (23) is 0, and adjust the flow regulating valve (14) of the hot water pipe of the primary mixer to the maximum. Adjust the flow regulating valve (15) of the cold water pipe of the secondary mixer to the minimum, so that the detection value V3 of the flow detection point c (25) is 0, and adjust the flow regulating valve (16) of the hot water pipe of the secondary mixer to the maximum. Adjust the steam pipe flow regulating valve (17) of the secondary mixer to the minimum so that the flow detection point e (27) detects value V5=0; adjust the steam pipe flow regulating valve (18) of the sintering machine mixing ore trough to the minimum so that the flow detection point f (28) detects value V6=0; Step 3: The intelligent preheating system module of the primary mixer adjusts the flow regulating valve (13) of the cold water pipe and the flow regulating valve (14) of the primary mixer according to the change of the detected value T2 at the temperature measuring point b (20), so that the detected value T2 tends to stabilize and the adjustment stops; Step 4: The intelligent preheating system module of the secondary mixer adjusts the flow regulating valve (15), the flow regulating valve (16) of the cold water pipe of the secondary mixer and the flow regulating valve (17) of the steam pipe of the secondary mixer according to the change of the detected value T3 at the temperature measuring point c (21), so that the detected value T3 tends to stabilize and the adjustment stops; Step 5: Gradually increase the flow rate regulating valve (17) of the secondary mixer steam pipe. When the detected value T3 reaches its maximum value, slightly decrease the flow rate regulating valve (17) of the secondary mixer steam pipe. When the detected value T3 decreases, slightly increase the flow rate regulating valve (17) of the secondary mixer steam pipe... Repeat this process until the detected value T3 stabilizes, then stop adjusting. Step 6: The intelligent preheating system module of the mixed material trough adjusts the steam pipe flow regulating valve (18) of the sintering machine mixed material trough according to the change of the detected value T4 at the temperature measuring point d (22), so that the detected value T4 tends to stabilize and the adjustment stops.

5. The intelligent preheating control method for sintering mixtures according to claim 4, characterized in that, The specific calculation method for the total amount of water added to the primary mixer's cold water pipe (7) and hot water pipe (8), and the total amount of water added to the secondary mixer's cold water pipe (9) and hot water pipe (10) in step 1 is as follows: Based on the detection value G1 at weighing point a (29) and the detection value W0 at moisture detection point a (33), the dry material quantity G0 (t / h) of the mixture is calculated: G0 = (1 - (W0 / 100)) * G1 The total amount of water added to the cold water pipe (7) and hot water pipe (8) of the primary mixer is: V1+V2=G0*(W / 100)*(P1 / 100) Where V1 is the detection value of flow detection point a (23) and V2 is the detection value of flow detection point b (24); The total amount of water added to the cold water pipe (9) and hot water pipe (10) of the secondary mixer is: V3+V4=G0*(W / 100)-G2*(W1 / 100) Where V3 is the flow detection value at point c (25), V4 is the flow detection value at point d (26), G2 is the weighing point b (30), and W1 is the moisture detection value at point b (34).

6. The intelligent preheating control method for sintering mixtures according to claim 5, characterized in that, The specific method of step 3 is as follows: When the detected value T2 at temperature measuring point b (20) reaches its maximum value, gradually reduce the flow regulating valve (14) of the hot water pipe of the primary mixer and gradually increase the flow regulating valve (13) of the cold water pipe of the primary mixer, while maintaining V1+V2=G0*(W / 100)*(P1 / 100); when the detected value T2 decreases, slightly increase the flow regulating valve (14) of the hot water pipe of the primary mixer and simultaneously reduce the flow regulating valve (13) of the cold water pipe of the primary mixer, while maintaining V1+V2=G0*(W / 100)*(P1 / 100). When the detected value T2 increases, slightly reduce the flow regulating valve (14) of the hot water pipe of the primary mixer, and at the same time increase the flow regulating valve (13) of the cold water pipe of the primary mixer, and keep V1+V2=G0*(W / 100)*(P1 / 100)... Repeat this process until the detected value T2 stabilizes, stop adjusting, and record the detected value G1 of weighing point a (29), the detected value T1 of temperature measuring point a (19), the detected value V1 of flow measuring point a (23), and the detected value V2 of flow measuring point b (24) at this time, and store them as commonly used values.

7. The intelligent preheating control method for sintering mixtures according to claim 5, characterized in that, The specific method for step 4 is as follows: Close the steam pipe flow regulating valve (17) of the secondary mixer. When the temperature measurement point c (21) reaches its maximum value T3, gradually reduce the flow regulating valve (16) of the hot water pipe of the secondary mixer and gradually increase the flow regulating valve (15) of the cold water pipe of the secondary mixer, while maintaining V3+V4=G0*(W / 100)-G2*(W1 / 100); when the temperature measurement point c (21) shows a decrease in T3, slightly increase the flow regulating valve (16) of the hot water pipe of the secondary mixer. At the same time, reduce the flow rate regulating valve (15) of the cold water pipe of the secondary mixer and keep V3+V4=G0*(W / 100)-G2*(W1 / 100). When the detected value T3 rises, slightly reduce the flow rate regulating valve (16) of the hot water pipe of the secondary mixer and simultaneously increase the flow rate regulating valve (15) of the cold water pipe of the secondary mixer, and keep V3+V4=G0*(W / 100)-G2*(W1 / 100)... Repeat this process until the detected value T3 stabilizes and then stop adjusting.

8. The intelligent preheating control method for sintering mixtures according to claim 5, characterized in that, The specific method of step 6 is as follows: gradually increase the flow rate regulating valve (18) of the steam pipe of the sintering machine mixture ore trough. When the temperature measurement point d (22) reaches the maximum value T4, slightly decrease the flow rate regulating valve (18) of the steam pipe of the sintering machine mixture ore trough. When the measured value T4 decreases, slightly increase the flow rate regulating valve (18) of the steam pipe of the sintering machine mixture ore trough. Repeat this process until the measured value T4 tends to stabilize. Stop the adjustment and record the measured value G3 of the weighing point c (31), the measured value T3 of the temperature measurement point c (21), and the measured value V6 of the flow rate detection point f (28) at this time, and store them as commonly used values.

9. The intelligent preheating control method for sintering mixtures according to claim 5, characterized in that, When the system is running, the error range between G2-G1 and V1+V2 and the error range between G3-G2 and V3+V4 are set, where G1 is the detection value of weighing point a (29), G2 is the detection value of weighing point b (30), V1 is the detection value of flow detection point a (23), V2 is the detection value of flow detection point b (24), G3 is the detection value of weighing point c (31), V3 is the detection value of flow detection point c (25), and V4 is the detection value of flow detection point d (26). When the error between the G2-G1 value and the V1+V2 value is greater than the set range, the G2-G1 value is used as the total amount of water added to the primary mixer cold water pipe (7) and the primary mixer hot water pipe (8) as described in step 1. An alarm is issued and the flow regulating valve (13) and the flow regulating valve (14) of the primary mixer cold water pipe are adjusted. The G2-G1 value and the V1+V2 value are compared again. When the error between the two is less than the set range, the original control is restored. When the error between the G3-G2 value and the V3+V4 value is greater than the set range, the G3-G2 value is used as the total amount of water added to the secondary mixer cold water pipe (9) and the secondary mixer hot water pipe (10) as described in step 1. An alarm is issued and the flow regulating valves (15) and (16) of the secondary mixer cold water pipe and the secondary mixer hot water pipe are adjusted. The G3-G2 value and the V3+V4 value are compared again. When the error between the two is less than the set range, the original control is restored.

10. The intelligent preheating control method for sintering mixtures according to claim 5, characterized in that, When the system is running, the error range between the value of (G1*W0+V1+V2) / (G1+V1+V2)*100 and the value of W1 detected at moisture detection point b (34), and the error range between the value of (G2*W1+V3+V4) / (G2+V3+V4)*100 and the value of W2 detected at moisture detection point c (35) are set, where G1 is the value of the weighing point a (29), W0 is the value of the moisture detection point a (33), V1 is the value of the flow detection point a (23), V2 is the value of the flow detection point b (24), G2 is the value of the weighing point b (30), V3 is the value of the flow detection point c (25), and V4 is the value of the flow detection point d (26). When the error between (G1*W0+V1+V2) / (G1+V1+V2)*100 and the detection value W1 at moisture detection point b (34) is greater than the set range, the value of (G1*W0+V1+V2) / (G1+V1+V2)*100 is taken as the detection value W1 in step 1, an alarm is issued and the flow regulating valve (15) of the cold water pipe of the secondary mixer and the flow regulating valve (16) of the hot water pipe of the secondary mixer are adjusted; continue to compare the value of (G1*W0+V1+V2) / (G1+V1+V2)*100 with the detection value W1, and when the error between the two is less than the set range, the original control is restored; When the error between (G2*W1+V3+V4) / (G2+V3+V4)*100 and the moisture detection point c(35) detection value W2 is greater than the set range, an alarm is issued to remind the user to check the detection value W2 and continue to compare (G2*W1+V3+V4) / (G2+V3+V4)*100 with the detection value W2. When the error between the two is less than the set range, the alarm is deactivated.

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