CN113559589B - Method for optimizing filter cloth use of filter tank by adding water inlet valve positioner - Google Patents
Method for optimizing filter cloth use of filter tank by adding water inlet valve positioner Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 239000004744 fabric Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004140 cleaning Methods 0.000 claims abstract description 89
- 230000001960 triggered effect Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 45
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 11
- 238000001914 filtration Methods 0.000 description 9
- 238000011001 backwashing Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
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Abstract
本发明公开了一种滤池通过增加进水阀门定位器优化滤布使用的方法。在滤池进水阀端加装阀门定位器；更换电控柜内模拟量输入模块为EM AM03；从EM AM03模块上引出一组模拟量输出信号接到进水阀门定位器的模拟量信号输入端；设计转换程序将阀门开度0‑100％的信号转换成4‑20mA信号传输给阀门定位器；启动自动模式时将初始阀门开度设置为25‑35％传输给阀门定位器；记录前后两次触发清洗间隔时间，与最佳清洗间隔时间对比，如大则增加进水阀开度，反之则减小进水阀开度；当进水阀开度最小，两次触发清洗间隔时间仍小于最佳时间，则触发报警提示需更换滤布或检查进水量。该优化设计能保证滤布得到最大化保护和使用。
The invention discloses a method for optimizing the use of filter cloth in a filter by adding a water inlet valve positioner. Install a valve positioner at the water inlet valve end of the filter; replace the analog input module in the electric control cabinet with EM AM03; lead a set of analog output signals from the EM AM03 module to the analog signal input of the water inlet valve positioner terminal; design the conversion program to convert the signal of valve opening 0-100% into 4-20mA signal and transmit it to the valve positioner; when starting the automatic mode, set the initial valve opening to 25-35% and transmit it to the valve positioner; record before and after The interval between two trigger cleanings is compared with the optimal cleaning interval. If it is larger, the opening of the water inlet valve will be increased; otherwise, the opening of the water inlet valve will be decreased; If the time is less than the optimal time, an alarm will be triggered to indicate that the filter cloth needs to be replaced or the water intake should be checked. The optimized design can ensure the maximum protection and use of the filter cloth.
Description
技术领域technical field
本发明属于滤布清洗技术领域，涉及一种滤池通过增加进水阀门定位器优化滤布使用的方法。The invention belongs to the technical field of filter cloth cleaning, and relates to a method for optimizing the use of filter cloth by adding a water inlet valve positioner in a filter tank.
背景技术Background technique
竖片滤布滤池使用的滤布，随着过滤量的累积，需要对滤布表面进行清洗。滤池使用的滤布本身的使用寿命是随着过滤量和过滤时间累积消耗的，而不正确的使用也会缩短它的使用寿命，这里所说的不正确的使用方式是指过度地清洗滤布。The filter cloth used in the vertical sheet filter cloth filter needs to clean the surface of the filter cloth as the filtration volume accumulates. The service life of the filter cloth used in the filter is accumulated and consumed with the amount of filtration and filtration time, and incorrect use will also shorten its service life. The incorrect use mentioned here refers to excessive cleaning of the filter cloth. cloth.
目前常规的对于滤布的清洗需求主要是两方面：一是滤池内的液位到达高液位的情况，二是到达了预设的清洗周期。但是，随着滤池的使用，滤布的过滤效果也会越来越差，也就是说相同时间内滤水的量会越来越少，在进水量相同的情况下，出现高液位的频率会越来越高，滤布进行清洗的次数越来越密集，造成对滤布额外的伤害。At present, the conventional cleaning requirements for filter cloth are mainly in two aspects: one is when the liquid level in the filter tank reaches a high level, and the other is when the preset cleaning cycle is reached. However, with the use of the filter, the filtering effect of the filter cloth will become worse and worse, that is to say, the amount of filtered water will be less and less in the same time period. The frequency will be higher and higher, and the filter cloth will be cleaned more and more intensively, causing additional damage to the filter cloth.
滤布清洗触发的方式主要是两类：一种是根据滤池内的液位值，当达到一定的液位时进行清洗操作；另一种是在一定的时间间隔内，对滤池进行清洗滤布的操作。后者主要用于滤池使用初期，因为这个时候滤布过滤效果好，滤水量多，池内液位上升慢，靠液位清洗的话需要很长时间才会清洗滤布，也不合理，所以才设置一个合理的清洗周期来规范滤布清洗的频率。而当滤布使用一段时间后，滤布的滤水性会逐渐变差，相同时间内池内剩余水量多，液位比较容易到达清洗的液位值，进行清洗的次数会越来越频繁，从使用的角度来说，一旦高液位触发清洗的时间间隔低于预设周期的时间间隔，就代表滤池的清洗处于一种异常的状态，最严重可能出现一次清洗完成后马上就进行下一次清洗的情况，也就是说滤池一直处于清洗的状态下，这样对于滤布的使用寿命是绝对不利的。There are mainly two types of filter cloth cleaning triggers: one is to perform cleaning operations when a certain liquid level is reached according to the liquid level value in the filter tank; the other is to clean the filter tank within a certain time interval Operation of filter cloth. The latter is mainly used in the initial stage of filter use, because at this time the filter cloth has a good filtering effect, the amount of filtered water is large, and the liquid level in the pool rises slowly. If it is cleaned by the liquid level, it will take a long time to clean the filter cloth, which is unreasonable. Set a reasonable cleaning cycle to regulate the frequency of filter cloth cleaning. However, when the filter cloth is used for a period of time, the filterability of the filter cloth will gradually deteriorate, and the remaining water in the pool will be large in the same period of time. From the point of view, once the time interval of high liquid level trigger cleaning is lower than the time interval of the preset cycle, it means that the cleaning of the filter is in an abnormal state, and the most serious possibility is that the next cleaning will be carried out immediately after one cleaning is completed. In other words, the filter is always in a state of cleaning, which is absolutely detrimental to the service life of the filter cloth.
如何从调节进水量的角度来优化滤布清洗的次数，达到一个合理清洗的效果，这是目前有待解决的问题。How to optimize the frequency of filter cloth cleaning from the perspective of adjusting the water intake to achieve a reasonable cleaning effect is a problem to be solved at present.
发明内容Contents of the invention
本发明的目的在于克服现有技术的不足，提供一种从调节进水量的角度来优化滤布清洗的次数，达到一个合理清洗效果的方法，即一种滤池通过增加进水阀门定位器优化滤布使用的方法。The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method to optimize the number of filter cloth cleanings from the perspective of adjusting the water intake to achieve a reasonable cleaning effect, that is, a filter is optimized by adding a water intake valve positioner The method of using the filter cloth.
本发明的技术方案如下：Technical scheme of the present invention is as follows:
一种滤池通过增加进水阀门定位器优化滤布使用的方法，包括以下步骤：A method for optimizing the use of filter cloth in a filter by adding a water inlet valve positioner, comprising the following steps:
1).在竖片滤布滤池进水阀端加装一个与进水阀相容规格的阀门定位器；1). Install a valve positioner compatible with the water inlet valve at the water inlet valve end of the vertical filter cloth filter;
2).更换电控柜内模拟量输入模块EM AE04为EM AM03；2). Replace the analog input module EM AE04 in the electric control cabinet with EM AM03;
3).从EM AM03模块上引出一组模拟量输出信号线缆，连接到进水阀门定位器的模拟量信号输入端；3). Lead a set of analog output signal cables from the EM AM03 module, and connect to the analog signal input end of the water inlet valve positioner;
4).在PLC程序中，设计一个转换程序，将阀门开度0％-100％的信号转换成4-20mA信号传输给阀门定位器；4). In the PLC program, design a conversion program to convert the signal of valve opening 0%-100% into 4-20mA signal and transmit it to the valve positioner;
5).设计程序，当启动自动模式时，将初始阀门开度设置为25-35％传输给阀门定位器，保证滤池在一个相对处理量较低的状态下开始工作；5). Design the program. When the automatic mode is started, set the initial valve opening to 25-35% and transmit it to the valve positioner to ensure that the filter starts to work in a relatively low capacity state;
6).在PLC程序中，记录滤池从开始自动模式到第一次到达高液位触发清洗的时间；此后记录前后两次到达高液位触发清洗的间隔时间，亦即，记录前后两次到达高液位触发清洗(反冲洗)的时刻，然后将两者相减，得出前后两次到达高液位触发清洗的间隔时间；然后，将前后两次到达高液位触发清洗的间隔时间与最佳清洗间隔时间(一般为2小时)对比，再根据预设调整进水阀门开度：如果大于最佳清洗间隔时间，则增加进水阀阀门的开度，此开度设置越小，调节起来越精细，不会出现反复调整的情况；反之，如果小于最佳清洗间隔时间，则减小进水阀阀门的开度；6). In the PLC program, record the time from the start of the automatic mode of the filter to the first time when it reaches the high liquid level to trigger the cleaning; after that, record the interval time between the two times before and after reaching the high liquid level to trigger the cleaning, that is, record the two times before and after The moment when the high liquid level triggers cleaning (backwashing) is reached, and then subtract the two to obtain the interval time between the two high liquid level trigger cleanings before and after; then, the interval time between the two high liquid level trigger cleaning Compared with the optimal cleaning interval (generally 2 hours), adjust the opening of the water inlet valve according to the preset: if it is greater than the optimal cleaning interval, increase the opening of the water inlet valve. The smaller the opening, the The finer the adjustment, there will be no repeated adjustments; on the contrary, if it is less than the optimal cleaning interval, reduce the opening of the water inlet valve;
7)在程序设计中，设定进水阀允许的最大开度和最小开度；设计程序，当进水阀开度为最小开度时，如果前后两次到达高液位触发清洗的间隔时间还是小于最佳清洗间隔时间，则PLC系统触发报警，提示使用者滤池处于异常状态，需要更换滤布或者检查进水量过大的情况。7) In the program design, set the maximum opening and minimum opening allowed by the water inlet valve; design the program, when the water inlet valve opening is the minimum opening, if the high liquid level is reached twice before and after, the interval between cleaning will be triggered If it is still less than the optimal cleaning interval, the PLC system will trigger an alarm to remind the user that the filter is in an abnormal state and that the filter cloth needs to be replaced or the water inflow is too large.
进一步地，步骤5)中，设计程序，当启动自动模式时，将初始阀门开度优选设置为30％传输给阀门定位器。Further, in step 5), a program is designed, and when the automatic mode is started, the initial valve opening is preferably set to 30% and transmitted to the valve positioner.
进一步地，步骤6)中，如果前后两次到达高液位触发清洗的间隔时间大于最佳清洗间隔时间，则进水阀阀门开度增加2-8％；反之，如果前后两次到达高液位触发清洗的间隔时间小于最佳清洗间隔时间，则进水阀阀门开度减小2-8％。Further, in step 6), if the interval between two times of reaching the high liquid level to trigger cleaning is greater than the optimal cleaning interval, the valve opening of the water inlet valve is increased by 2-8%; If the interval time of bit-triggered cleaning is less than the optimum cleaning interval time, the valve opening of the water inlet valve will be reduced by 2-8%.
更进一步地，步骤6)中，如果前后两次到达高液位触发清洗的间隔时间大于最佳清洗间隔时间，则进水阀阀门开度增加5％；反之，如果前后两次到达高液位触发清洗的间隔时间小于最佳清洗间隔时间，则进水阀阀门开度减小5％。Furthermore, in step 6), if the interval time between the trigger cleaning of the high liquid level is greater than the optimal cleaning interval time, the opening of the water inlet valve is increased by 5%; on the contrary, if the high liquid level is reached twice before and after If the interval time between trigger cleaning is less than the optimal cleaning interval time, the valve opening of the water inlet valve will be reduced by 5%.
进一步地，步骤6)中，最佳清洗间隔时间为2小时。Further, in step 6), the optimal cleaning interval is 2 hours.
进一步地，步骤7)中，程序设计中，设定进水阀允许的最大开度为100％，此时阀门处于完全打开的状态。Further, in step 7), in the program design, the maximum allowable opening of the water inlet valve is set to 100%, and the valve is in a fully open state at this time.
进一步地，步骤7)中，程序设计中，设定进水阀允许的最小开度为20％；当进水阀开度为20％时，如果前后两次到达高液位触发清洗的间隔时间还是小于最佳清洗间隔时间，则PLC系统触发报警，提示使用者滤池处于异常状态，需要更换滤布或者检查进水量过大的情况。Further, in step 7), in the program design, set the minimum opening of the water inlet valve to 20%; If it is still less than the optimal cleaning interval, the PLC system will trigger an alarm to remind the user that the filter is in an abnormal state and that the filter cloth needs to be replaced or the water inflow is too large.
进一步地，所述进水阀为手动自动一体式电动阀门(手自一体式电动阀门)。Further, the water inlet valve is a manual-automatic integrated electric valve (manual-automatic integrated electric valve).
本发明的有益效果：Beneficial effects of the present invention:
本发明提供了一种竖片滤布滤池通过增加进水阀门定位器，通过程序检测计算，调节进水量，优化滤布使用的方法。通过控制进水阀的开度，可以调节进水的水量。实现在自动状态下，记录前后两次到达高液位触发清洗的间隔时间，亦即，记录前后两次到达高液位触发清洗(反冲洗)的时刻，然后将两者相减，得出前后两次到达高液位触发清洗的间隔时间，将此间隔时间与最优清洗间隔时间对比，再根据预设调整进水阀门开度；若大于最佳周期，则进水阀开度增加某个值，直至到达最大值；若小于最佳周期，则进水阀开度减少某个值，直至到达最极限情况，则触发警告，显示判断滤池滤布处于临界状态，需要更换滤布。The invention provides a method for adjusting the water intake and optimizing the use of the filter cloth by adding a water inlet valve locator to a vertical sheet filter cloth filter tank and through program detection and calculation. By controlling the opening of the water inlet valve, the amount of water entering the water can be adjusted. In the automatic state, record the interval time between reaching the high liquid level to trigger cleaning twice before and after, that is, record the time when the high liquid level reaches the high liquid level twice before and after to trigger cleaning (backwashing), and then subtract the two to get the before and after The interval between two times when the high liquid level is reached to trigger cleaning is compared with the optimal cleaning interval, and then the opening of the water inlet valve is adjusted according to the preset; if it is greater than the optimal cycle, the opening of the water inlet valve is increased by a certain amount. value until it reaches the maximum value; if it is less than the optimal period, the opening of the water inlet valve will be reduced by a certain value until it reaches the extreme limit, and a warning will be triggered, indicating that the filter cloth of the filter is judged to be in a critical state and the filter cloth needs to be replaced.
本发明的优化设计就是从调节进水量的角度来优化滤布清洗的次数，达到一个合理清洗的效果。本发明的优化设计主要是通过智能化的手段，无须人为参与，就能将滤池调整到一个正确合适的使用程序，能保证滤布得到最大化保护和使用。The optimal design of the present invention is to optimize the number of filter cloth cleanings from the perspective of adjusting the water intake, so as to achieve a reasonable cleaning effect. The optimized design of the present invention is mainly to adjust the filter tank to a correct and appropriate use program through intelligent means without human participation, and can ensure maximum protection and use of the filter cloth.
本发明的滤池通过增加进水阀门定位器优化滤布使用的方法，优点如下：The filter of the present invention optimizes the use of filter cloth by adding a water inlet valve positioner, and has the following advantages:
1.减少调试时间，通过系统本身的程序设计，可以自动调整到滤池在一个最合适的状态下运行(最合适的状态是指反冲洗时间间隔最合适，滤布使用最优化的环境)；一般来说一台竖片滤池的调试周期大概是3-4天时间，而采用全新设计的滤池可以在1天内完成调试，并保证滤池持续的使用效果。1. Reduce the debugging time. Through the program design of the system itself, it can be automatically adjusted to run the filter in the most suitable state (the most suitable state refers to the most suitable backwashing time interval and the optimal use of filter cloth); Generally speaking, the commissioning cycle of a vertical filter is about 3-4 days, while the newly designed filter can be commissioned within 1 day, and the continuous use effect of the filter can be guaranteed.
2.滤布过滤效果最优，池内的水通过滤布的过滤到达洁净的效果，而过滤量的增加会导致滤布本身受到污染，需要清洗，长时间未清洗滤布本体会受到污染，即使再清洗也会降低滤布效果，所以保证合适的过滤量非常重要，而本系统的无级调整进水阀的开度可以达到这样的效果。2. The filtering effect of the filter cloth is the best. The water in the pool is filtered through the filter cloth to achieve a clean effect. However, the increase in the amount of filtration will cause the filter cloth itself to be polluted and needs to be cleaned. If it is not cleaned for a long time, the filter cloth itself will be polluted. Further cleaning will also reduce the effect of the filter cloth, so it is very important to ensure a suitable filtration volume, and the stepless adjustment of the opening of the water inlet valve in this system can achieve this effect.
3.合适的自清洗次数，确保滤布使用寿命最优，每一次清洗对滤布本身也会损害，所以通过系统自我调整进水量，在滤布效果好的时候满足足够的过滤量；在滤布折旧后，降低进水量，同时保证固定时间间隔的清洗，使得滤布达到最大的利用率。3. Appropriate self-cleaning times ensure the optimal service life of the filter cloth, and each cleaning will also damage the filter cloth itself, so the system self-adjusts the water intake to meet sufficient filtering capacity when the filter cloth effect is good; After the cloth is depreciated, the amount of water inflow is reduced, and at the same time, cleaning at fixed intervals is guaranteed, so that the filter cloth can achieve the maximum utilization rate.
附图说明Description of drawings
图1是本发明一种滤池通过增加进水阀门定位器优化滤布使用的程序逻辑图。Fig. 1 is a program logic diagram for optimizing the use of filter cloth by adding a water inlet valve positioner in a filter according to the present invention.
具体实施方式Detailed ways
以下结合附图和实施例对本发明作进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
实施例1Example 1
如图1所示，本发明一种滤池通过增加进水阀门定位器优化滤布使用的方法，它包括：As shown in Figure 1, a filter of the present invention optimizes the use of filter cloth by increasing the water inlet valve positioner, which includes:
1.土建竖片滤布滤池进水阀端追加安装一个与进水阀(手自一体式电动阀门)相容规格的阀门定位器；1. A valve positioner compatible with the water inlet valve (manually integrated electric valve) is additionally installed at the water inlet valve end of the civil vertical piece filter cloth filter;
2.更换电控柜内模拟量输入模块EM AE04为EM AM03；2. Replace the analog input module EM AE04 in the electric control cabinet with EM AM03;
3.从EM AM03模块上引出一组模拟量输出信号线缆，连接到进水阀门定位器的模拟量信号输入端；3. Lead out a set of analog output signal cables from the EM AM03 module, and connect them to the analog signal input end of the water inlet valve positioner;
4.在PLC程序中，设计一个转换程序，将阀门开度0％-100％的信号转换成4-20mA信号传输给阀门定位器；4. In the PLC program, design a conversion program to convert the signal of valve opening 0%-100% into 4-20mA signal and transmit it to the valve positioner;
5.设计程序，当启动自动模式时，将初始阀门开度设置为25％传输给阀门定位器，保证滤池在一个相对处理量较低的状态下开始工作；5. Design the program. When the automatic mode is started, the initial valve opening is set to 25% and transmitted to the valve positioner to ensure that the filter starts to work in a state of relatively low processing capacity;
6.在PLC程序中，记录滤池从开始自动模式到第一次到达高液位触发清洗的时间，此后记录前后两次到达高液位触发清洗的间隔时间，亦即，记录前后两次到达高液位触发清洗(反冲洗)的时刻，然后将两者相减，得出前后两次到达高液位触发清洗的间隔时间；然后，将这个前后两次到达高液位触发清洗的间隔时间与最佳清洗间隔时间(一般为2小时)对比，再根据预设调整进水阀门开度：如果大于2小时，则进水阀阀门开度增加5％，此开度设置越小，调节起来越精细，不会出现反复调整的情况；反之，如果小于2小时，则进水阀阀门开度减小5％；6. In the PLC program, record the time from the start of the automatic mode of the filter to the first high liquid level trigger cleaning, and then record the interval time between the two high liquid level trigger cleanings, that is, record the two arrivals before and after The moment when the high liquid level triggers cleaning (backwashing), and then subtract the two to get the interval time between the two reaching the high liquid level triggering the cleaning; then, the interval time between the two reaching the high liquid level triggering the cleaning Compared with the optimal cleaning interval (generally 2 hours), adjust the opening of the water inlet valve according to the preset: if it is greater than 2 hours, the opening of the water inlet valve will increase by 5%. The finer it is, there will be no repeated adjustments; on the contrary, if it is less than 2 hours, the opening of the water inlet valve will be reduced by 5%;
7.程序设计中，进水阀允许的开度最大为100％，此时阀门处于完全打开的状态；进水阀允许的开度最小为20％，此时(进水阀开度为20％时)如果前后两次到达高液位触发清洗的间隔时间还是小于2小时，则PLC系统触发报警，提示使用者滤池处于异常状态，需要更换滤布或者检查进水量过大的情况。7. In program design, the maximum allowable opening of the water inlet valve is 100%, and the valve is fully open at this time; the minimum allowable opening of the water inlet valve is 20%, at this time (the water inlet valve opening is 20% time) If the interval between reaching the high liquid level twice before and after to trigger cleaning is still less than 2 hours, the PLC system will trigger an alarm to remind the user that the filter is in an abnormal state and needs to replace the filter cloth or check the excessive water intake.
实施例2Example 2
本发明一种滤池通过增加进水阀门定位器优化滤布使用的方法，它包括：The invention discloses a method for optimizing the use of filter cloth by adding a water inlet valve positioner in a filter tank, which includes:
1.土建竖片滤布滤池进水阀端追加安装一个与进水阀(手自一体式电动阀门)相容规格的阀门定位器；1. A valve positioner compatible with the water inlet valve (manually integrated electric valve) is additionally installed at the water inlet valve end of the civil vertical piece filter cloth filter;
2.更换电控柜内模拟量输入模块EM AE04为EM AM03；2. Replace the analog input module EM AE04 in the electric control cabinet with EM AM03;
3.从EM AM03模块上引出一组模拟量输出信号线缆，连接到进水阀门定位器的模拟量信号输入端；3. Lead out a set of analog output signal cables from the EM AM03 module, and connect them to the analog signal input end of the water inlet valve positioner;
4.在PLC程序中，设计一个转换程序，将阀门开度0％-100％的信号转换成4-20mA信号传输给阀门定位器；4. In the PLC program, design a conversion program to convert the signal of valve opening 0%-100% into 4-20mA signal and transmit it to the valve positioner;
5.设计程序，当启动自动模式时，将初始阀门开度设置为30％传输给阀门定位器，保证滤池在一个相对处理量较低的状态下开始工作；5. Design the program. When the automatic mode is started, the initial valve opening is set to 30% and transmitted to the valve positioner to ensure that the filter starts to work in a state of relatively low processing capacity;
6.在PLC程序中，记录滤池从开始自动模式到第一次到达高液位触发清洗的时间，此后记录前后两次到达高液位触发清洗的间隔时间，亦即，记录前后两次到达高液位触发清洗(反冲洗)的时刻，然后将两者相减，得出前后两次到达高液位触发清洗的间隔时间；然后，将这个前后两次到达高液位触发清洗的间隔时间与最佳清洗间隔时间(一般为2小时)对比，再根据预设调整进水阀门开度：如果大于2小时，则进水阀阀门开度增加5％，此开度设置越小，调节起来越精细，不会出现反复调整的情况；反之，如果小于2小时，则进水阀阀门开度减小5％；6. In the PLC program, record the time from the start of the automatic mode of the filter to the first high liquid level trigger cleaning, and then record the interval time between the two high liquid level trigger cleanings, that is, record the two arrivals before and after The moment when the high liquid level triggers cleaning (backwashing), and then subtract the two to get the interval time between the two reaching the high liquid level triggering the cleaning; then, the interval time between the two reaching the high liquid level triggering the cleaning Compared with the optimal cleaning interval (generally 2 hours), adjust the opening of the water inlet valve according to the preset: if it is greater than 2 hours, the opening of the water inlet valve will increase by 5%. The finer it is, there will be no repeated adjustments; on the contrary, if it is less than 2 hours, the opening of the water inlet valve will be reduced by 5%;
7.程序设计中，进水阀允许的开度最大为100％，此时阀门处于完全打开的状态；进水阀允许的开度最小为20％，此时(进水阀开度为20％时)如果前后两次到达高液位触发清洗的间隔时间还是小于2小时，则PLC系统触发报警，提示使用者滤池处于异常状态，需要更换滤布或者检查进水量过大的情况。7. In program design, the maximum allowable opening of the water inlet valve is 100%, and the valve is fully open at this time; the minimum allowable opening of the water inlet valve is 20%, at this time (the water inlet valve opening is 20% time) If the interval between reaching the high liquid level twice before and after to trigger cleaning is still less than 2 hours, the PLC system will trigger an alarm to remind the user that the filter is in an abnormal state and needs to replace the filter cloth or check the excessive water intake.
实施例3Example 3
本发明一种滤池通过增加进水阀门定位器优化滤布使用的方法，它包括：The invention discloses a method for optimizing the use of filter cloth by adding a water inlet valve positioner in a filter tank, which includes:
1.土建竖片滤布滤池进水阀端追加安装一个与进水阀(手自一体式电动阀门)相容规格的阀门定位器；1. A valve positioner compatible with the water inlet valve (manually integrated electric valve) is additionally installed at the water inlet valve end of the civil vertical piece filter cloth filter;
2.更换电控柜内模拟量输入模块EM AE04为EM AM03；2. Replace the analog input module EM AE04 in the electric control cabinet with EM AM03;
3.从EM AM03模块上引出一组模拟量输出信号线缆，连接到进水阀门定位器的模拟量信号输入端；3. Lead out a set of analog output signal cables from the EM AM03 module, and connect them to the analog signal input end of the water inlet valve positioner;
4.在PLC程序中，设计一个转换程序，将阀门开度0％-100％的信号转换成4-20mA信号传输给阀门定位器；4. In the PLC program, design a conversion program to convert the signal of valve opening 0%-100% into 4-20mA signal and transmit it to the valve positioner;
5.设计程序，当启动自动模式时，将初始阀门开度设置为35％传输给阀门定位器，保证滤池在一个相对处理量较低的状态下开始工作；5. Design the program. When the automatic mode is started, the initial valve opening is set to 35% and transmitted to the valve positioner to ensure that the filter starts to work in a state of relatively low processing capacity;
6.在PLC程序中，记录滤池从开始自动模式到第一次到达高液位触发清洗的时间，此后记录前后两次到达高液位触发清洗的间隔时间，亦即，记录前后两次到达高液位触发清洗(反冲洗)的时刻，然后将两者相减，得出前后两次到达高液位触发清洗的间隔时间；然后，将这个前后两次到达高液位触发清洗的间隔时间与最佳清洗间隔时间(一般为2小时)对比，再根据预设调整进水阀门开度：如果大于2小时，则进水阀阀门开度增加2％，此开度设置越小，调节起来越精细，不会出现反复调整的情况；反之，如果小于2小时，则进水阀阀门开度减小2％；6. In the PLC program, record the time from the start of the automatic mode of the filter to the first high liquid level trigger cleaning, and then record the interval time between the two high liquid level trigger cleanings, that is, record the two arrivals before and after The moment when the high liquid level triggers cleaning (backwashing), and then subtract the two to get the interval time between the two reaching the high liquid level triggering the cleaning; then, the interval time between the two reaching the high liquid level triggering the cleaning Compared with the optimal cleaning interval (generally 2 hours), adjust the opening of the water inlet valve according to the preset: if it is greater than 2 hours, the opening of the water inlet valve will increase by 2%. The finer it is, there will be no repeated adjustments; on the contrary, if it is less than 2 hours, the opening of the water inlet valve will be reduced by 2%;
7.程序设计中，进水阀允许的开度最大为100％，此时阀门处于完全打开的状态；进水阀允许的开度最小为15％，此时(进水阀开度为15％时)如果前后两次到达高液位触发清洗的间隔时间还是小于2小时，则PLC系统触发报警，提示使用者滤池处于异常状态，需要更换滤布或者检查进水量过大的情况。7. In the program design, the maximum opening of the water inlet valve is 100%, and the valve is fully open at this time; the minimum opening of the water inlet valve is 15%, at this time (the opening of the water inlet valve is 15% time) If the interval between reaching the high liquid level twice before and after to trigger cleaning is still less than 2 hours, the PLC system will trigger an alarm to remind the user that the filter is in an abnormal state and needs to replace the filter cloth or check the excessive water intake.
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