ZILMET-LMG系列計量泵在LYJY-ZS油田注水加藥裝置中的應用
首先讓我們了解一下ZILMET-LMG系列計量泵的特點
1、重力鑄造鋁外殼散熱性能高，整體重量輕。ZILMET-LMG系列計量泵適用于各種酸堿溶液，無毒無味。
2、采用雙偏心n軸機構(gòu)，運行平穩(wěn)無噪音。
3、、接觸介質(zhì)泵頭由聚氯乙烯、聚四氟乙烯和不銹鋼制成。
4、由于其高性價比，它被廣泛應用于對壓力要求較低的水處理行業(yè)。
5、ZILMET-LMG系列計量泵在運行或停止時，流量可任意調(diào)節(jié)，也可實現(xiàn)定量輸出。
6、所有標準件均壓入模具，易損件易于供應，價格低廉。
測量范圍：0-500l/h流量：50L/h 120L/h 170L/h 240L/h 300L/h 400L/h 500l/h
ZILMET-LMG系列計量泵的壓力范圍：0-1.0mpa
驅(qū)動方式：電機驅(qū)動（可采用普通電機、防爆電機、變頻電機）
控制方式：手動、自動控制（可接收4-20mA信號調(diào)節(jié)流量）。LYJY-ZS油田注水加藥裝置設(shè)計。目前在輸油管道的各種加藥過程中，經(jīng)常采用人工控制。僅憑儲藥罐上的玻璃管液位計無法準確配制所需濃度的破乳劑溶液，不能根據(jù)液位的變化自動、準確地調(diào)整破乳劑的注入量，造成水的浪費，電力和人力，以及不斷增加的能源消耗。針對上述問題，研制了基于FPL-PLC的自動加水、定量加藥、定時攪拌、自動倒罐的控制裝置。實際運行表明，該裝置不僅降低了職工勞動強度，提高了安全系數(shù)，實現(xiàn)了以人為本的原則，使油田工業(yè)自動化水平達到了一個新的起點，提高了現(xiàn)場管理水平，使生產(chǎn)管理更加規(guī)范化、科學化。2系統(tǒng)結(jié)構(gòu)2.1加藥裝置的基本結(jié)構(gòu)。加藥裝置包括藥品儲罐、計量泵、攪拌器、液位開關(guān)、控制箱及附件。在實際系統(tǒng)中，可以根據(jù)用戶需求調(diào)整配置，以適應不同的工藝要求。圖1顯示了加藥裝置的結(jié)構(gòu)。控制系統(tǒng)包括：兩臺攪拌機、一臺加水電機、一臺加藥電機、兩臺加藥罐、一個化學品儲罐、多個電磁閥、高液位報警、低液位報警及交流接觸器、熱繼電器、中間繼電器、控制按鈕、信號燈、斷路器、開關(guān)等低壓控制裝置。2.2系統(tǒng)控制功能說明自動加藥裝置是根據(jù)加藥溶液的濃度實現(xiàn)自動加藥、自動混合、自動定量輸出的自動控制系統(tǒng)。在設(shè)定狀態(tài)下，設(shè)備不需要手動值守。可實現(xiàn)所需濃度溶液的自動配制和輸出，并可實現(xiàn)遠程控制，真正實現(xiàn)了配料、混合、加藥的自動化。考慮到現(xiàn)場操作的需要，設(shè)有手動控制功能，在任何情況下都優(yōu)先采用手動控制。（1） 手動操作前，將操作模式轉(zhuǎn)到“手動”位置，打開10.2，調(diào)用“手動控制”子程序。根據(jù)控制面板上相應的按鈕，可以連接相應的PLC輸入點并執(zhí)行相應的動作。以1號水箱為例，加水電機接通，即i0.5接通，輸出繼電器q0.1接通并自鎖，外部交流繼電器通電，加水電機開始加水。斷開加水電機，即連接i0.6，斷開q0.1，停止加水電機（當加水電機故障時，連接12.7，其常閉觸點斷開，Qo。1斷開，加水電機停止運行）。接通加藥電機，即10.7接通，q0.2輸出繼電器接通并自鎖，外部交流繼電器通電，加藥電機開始運行。斷開加藥電機，即11.0連接，Qo。2斷開，電機停止運行（加藥電機故障時，連接13。O、 其常閉觸點斷開，q0.2斷開，加藥電機停止運行）。當混頻器連接時，即i0.3連接時，輸出繼電器Qo。④ 通訊能力強，擴展模塊豐富；⑤易于操作和掌握。根據(jù)設(shè)備的運行特點和用戶的實際需要，基于S7-200 PLC控制，采用內(nèi)部軟繼電器實現(xiàn)過程控制，使系統(tǒng)控制簡單，提高了系統(tǒng)的穩(wěn)定性和可靠性，保證了產(chǎn)品質(zhì)量，提高了生產(chǎn)效率。3.2硬件電路分別在1號罐和2號罐內(nèi)設(shè)計，設(shè)有高液位控制器和低液位控制器。控制器的數(shù)據(jù)信號通過導線與配電柜內(nèi)的控制電路相連，實現(xiàn)對PLC的控制。圖2顯示了系統(tǒng)接口電路圖。3.2.1攪拌機系統(tǒng)的攪拌軸包括傳動軸本身和隨軸轉(zhuǎn)動的葉片。它是流體混合裝置的一個子系統(tǒng)，混合軸是混合操作的主要部分。由于流體激振力、輸入轉(zhuǎn)速波動和攪拌軸偏心的影響，攪拌軸的振動有三種類型：軸向振動、扭轉(zhuǎn)振動和彎曲振動。軸向振動是攪拌軸的伸長和縮短。
軸向振動的固有頻率通常很高（超過3 OOo赫茲）。因此，在設(shè)計攪拌器時不考慮攪拌軸的軸向振動。由于扭振引起的攪拌軸轉(zhuǎn)速波動很難觀察到，其固有頻率也很高。彎曲振動是軸的橫向擺動。它是Z的一種有害振動形式，其固有頻率低且具有破壞性。它與流體激振頻率和軸轉(zhuǎn)速相近，容易引起共振。因此，研究攪拌軸的彎曲振動，準確確定攪拌軸的臨界轉(zhuǎn)速，對于攪拌軸的設(shè)計和軸的失效預測具有重要意義。本裝置設(shè)計攪拌速度為120r/min，葉片安裝在距軸端100mm處，攪拌軸通過聯(lián)軸器與減速機輸出軸連接。螺旋葉片通常為三葉，也可以是2葉或4葉。攪拌槽葉片直徑與內(nèi)徑之比為0.2~0.5，一般為0.33，節(jié)距與葉片直徑之比為1:2。圖3為混合器的結(jié)構(gòu)圖。3.2.2 LYJY-ZS油田注水加藥裝置與氣力輸送系統(tǒng)直接相連。氣力輸送系統(tǒng)的正常運行必須具備恒壓條件。如果系統(tǒng)的壓力損失過大，會增加風機的負擔，甚至造成粉料堵塞，影響工作。為了盡可能降低系統(tǒng)的壓力損失，裝置設(shè)計中計量加藥裝置采用變螺距螺旋輸送機作為壓力送料氣力輸送裝置的給料裝置。裝置離氣力輸送管道越近，螺距越小，使輸送的粉末被壓緊，切斷漏氣通道。螺旋進給裝置的結(jié)構(gòu)。在帶襯套的鑄鐵殼體3中，有一段變螺距螺桿軸4，其右端通過彈性聯(lián)軸器與電機5連接。當螺桿在殼體中快速旋轉(zhuǎn)時，物料從上加料斗2通過螺桿通過澆口L壓入物料輸送管6。輸送管與氣力輸送裝置的輸送管連接，物料送入氣力輸送系統(tǒng)。隨著螺桿螺距從左到右逐漸減小，進入螺旋的物料被壓得越來越緊，可以防止氣力輸送管路中的壓縮空氣通過螺桿泄漏出去。物料進入氣力輸送系統(tǒng)后，與壓縮空氣相遇，吹散，使物料加速，形成壓縮空氣和物料的混合物，均勻地進入氣力輸送系統(tǒng)的輸送管道，在高速氣流的驅(qū)動下輸送物料。3.3程序設(shè)計系統(tǒng)程序大部分采用梯形圖編制，模擬計算和輸出采用功能塊和語句表。梯形圖直觀易懂，常用RS觸發(fā)器和時間繼電器。在編程中，只需分析和找到sy設(shè)置和復位條件，使每個受控（PLC輸出）按順序?qū)懭爰纯伞＿@樣可以使程序簡潔，減少編程錯誤的機會。
LYJY-ZS油田注水加藥裝置第1次投加DFY后，自動判斷投加裝置為開或關(guān)狀態(tài)（第1次投注后，DFY自動投加）？如果df23關(guān)閉，表示2號罐向管道內(nèi)注入化學品時，1號罐可以給水、加藥、攪拌；如果df23開啟，則表示1號罐向管道內(nèi)注入化學品，2號罐可以給水、加藥、攪拌）。加藥箱Z液位不高，加藥箱水位不高，加藥箱水位不高，加藥箱水位不高。當加藥罐液位達到Z高液位時，傳感器發(fā)出信號，加水電機停止，進水電磁閥關(guān)閉，加水過程結(jié)束。之后，加藥電機和攪拌機同時啟動。定時器KF3和kf4啟動。經(jīng)過一定延時后，加藥電機先停止，攪拌一定時間后攪拌機停止。加藥和混合過程完成。1號罐加水、加藥、攪拌完成，等待。在2號罐加藥過程中，當Z低液位報警時，發(fā)出信號請求，關(guān)閉2號罐加藥閥df24，打開1號罐加藥閥df23，1號罐向管道內(nèi)注藥，實現(xiàn)自動加水，2號罐定量加藥定時攪拌。完成澆注過程。圖5為加藥裝置的程序流程圖，圖6為控制系統(tǒng)的梯形圖。結(jié)論在LYJY-ZS油田注水加藥裝置的系統(tǒng)設(shè)計中，將各環(huán)節(jié)的工作信息傳送給PLC控制系統(tǒng)，使加藥系統(tǒng)自動運行，藥液濃度恒定，加藥準確。實現(xiàn)了加藥罐的全部自動化，大大提高了工作效率，減輕了工人的勞動強度，減少了化學品對人體的危害。同時，該裝置還具有結(jié)構(gòu)緊湊、配置豐富、安裝簡單、可靠性高等優(yōu)點。LYJY-ZS油田注水加藥裝置是一種自動化程度高的藥劑加藥系統(tǒng)。本文旨在尋找一種具有更高實用價值和更廣闊應用前景的產(chǎn)品，實現(xiàn)環(huán)境效益和經(jīng)濟效益的統(tǒng)一。以上是ZILMET-LMG系列計量泵在LYJY-ZS油田注水加藥裝置中的應用，以及LYJY-ZS油田注水加藥裝置的工作原理和工藝流程。歡迎更多計量泵和注水加藥裝置與上海龍亞技術(shù)部洽談。
Application of ZILMET-LMG series metering pump in water injection and dosing device of LYJY-ZS Oilfield
First of all, let's understand the characteristics of ZILMET-LMG series metering pump
1. Gravity casting aluminum shell has high heat dissipation performance and light weight. ZILMET-LMG series metering pump is suitable for all kinds of acid-base solution, non-toxic and tasteless.
2. Using double eccentric n-axis mechanism, it runs stably without noise.
3. Contact medium pump head is made of PVC, PTFE and stainless steel.
4. Because of its high cost performance, it is widely used in water treatment industry with low pressure requirements.
5. When ZILMET-LMG series metering pump is running or stopping, the flow can be adjusted arbitrarily, and the quantitative output can also be realized.
6. All standard parts are pressed into the mould, and the wearing parts are easy to supply and the price is low.
Measurement range: 0-500l / h flow: 50L / h 120L / h 170L / h 240L / h 300L / h 400L / h 500L / h
Pressure range: 0-1.0mpa drive mode: motor drive (ordinary motor, explosion-proof motor and frequency conversion motor can be used)
Control mode: manual and automatic control (can receive 4-20mA signal to adjust flow). Design of water injection and dosing device for LYJY-ZS oilfield. At present, manual control is often used in various dosing processes of oil pipeline. The glass tube liquid level gauge on the drug storage tank can not accurately prepare the required concentration of demulsifier solution, and can not automatically and accurately adjust the injection amount of demulsifier according to the change of liquid level, resulting in waste of water, power and manpower, and increasing energy consumption. In view of the above problems, a control device based on fpl-plc is developed for automatic water adding, quantitative dosing, timing stirring and automatic tank pouring. The actual operation shows that the device not only reduces the labor intensity of workers, improves the safety factor, realizes the principle of people-oriented, makes the Oilfield Industrial automation level reach a new starting point, improves the field management level, and makes the production management more standardized and scientific. 2 system structure 2.1 basic structure of dosing device. The dosing device includes drug storage tank, metering pump, agitator, liquid level switch, control box and accessories. In the actual system, the configuration can be adjusted according to the needs of users to adapt to different process requirements. Figure 1 shows the structure of the dosing device. The control system includes two mixers, one water adding motor, one dosing motor, two dosing tanks, one chemical storage tank, multiple solenoid valves, high level alarm, low level alarm and AC contactor, thermal relay, intermediate relay, control button, signal lamp, circuit breaker, switch and other low-voltage control devices. 2.2 system control function description the automatic dosing device is an automatic control system which can realize automatic dosing, automatic mixing and automatic quantitative output according to the concentration of dosing solution. In the set state, the equipment does not need to be on duty manually. It can realize the automatic preparation and output of the required concentration solution, and realize the remote control, so as to realize the automation of batching, mixing and dosing. Considering the need of field operation, manual control function is set, and manual control is preferred in any case. (1) Before manual operation, turn the operation mode to "manual" position, open 10.2, and call "manual control" subroutine. According to the corresponding buttons on the control panel, the corresponding PLC input points can be connected and corresponding actions can be executed. Take No.1 water tank as an example, the water adding motor is connected, i.e. i0.5 is connected, the output relay q0.1 is connected and self-locking, the external AC relay is powered on, and the water adding motor starts to add water. Disconnect the water adding motor, i.e. connect i0.6, disconnect q0.1, and stop the water adding motor (when the water adding motor fails, connect 12.7, its normally closed contact is open, Qo. 1 is disconnected, and the water adding motor stops running). Switch on the dosing motor, that is, 10.7 is on, q0.2 output relay is on and self-locking, the external AC relay is powered on, and the dosing motor starts to run. Disconnect the dosing motor, i.e. 11.0 connection, Qo. 2 is disconnected and the motor stops running (when the dosing motor fails, connect 13. O. The normally closed contact is open, q0.2 is disconnected, and the dosing motor stops running). When the mixer is connected, i.e. i0.3 is connected, the output relay Qo. ④ It is easy to operate and master. According to the operation characteristics of the equipment and the actual needs of users, based on S7-200 PLC control, the internal soft relay is used to realize process control, which makes the system control simple, improves the stability and reliability of the system, ensures the product quality and improves the production efficiency. 3.2 hardware circuit is designed in No.1 tank and No.2 tank respectively, with high level controller and low level controller. The data signal of the controller is connected with the control circuit in the power distribution cabinet through the wire to realize the control of PLC. Figure 2 shows the system interface circuit diagram. 3.2.1 the mixing shaft of the mixer system includes the drive shaft itself and the blades rotating with the shaft. It is a subsystem of fluid mixing device, and mixing shaft is the main part of mixing operation. Due to the influence of fluid exciting force, input speed fluctuation and eccentricity of mixing shaft, there are three types of vibration of mixing shaft: axial vibration, torsional vibration and bending vibration. Axial vibration is the elongation and shortening of mixing shaft.
The natural frequency of axial vibration is usually very high (more than 3 OOo Hz). Therefore, the axial vibration of mixing shaft is not considered in the design of agitator. It is difficult to observe the speed fluctuation of the mixing shaft caused by torsional vibration, and its natural frequency is also very high. Bending vibration is the lateral swing of the shaft. It is a harmful vibration form of Z, with low natural frequency and destructive. It is similar to the frequency of fluid excitation and shaft speed, and it is easy to cause resonance. Therefore, it is of great significance to study the bending vibration of the mixing shaft and determine the critical speed of the mixing shaft accurately for the design of the mixing shaft and the failure prediction of the shaft. The mixing speed of the device is designed to be 120r / min, the blade is installed at the position of 100 mm from the shaft end, and the mixing shaft is connected with the output shaft of the reducer through the coupling. Spiral leaves are usually trifoliate, but can also be 2-or 4-leaved. The ratio of blade diameter to inner diameter is 0.2 ~ 0.5, generally 0.33, and the ratio of pitch to blade diameter is 1:2. Fig. 3 shows the structure of the mixer. 3.2.2 metering dosing device metering dosing device is directly connected with pneumatic conveying system. The normal operation of pneumatic conveying system must have constant pressure condition. If the pressure loss of the system is too large, it will increase the burden of the fan, and even cause powder blockage, affecting the work. In order to reduce the pressure loss of the system as much as possible, the variable pitch screw conveyor is used as the feeding device of the pneumatic conveying device. The closer the device is to the pneumatic conveying pipeline, the smaller the pitch is, so that the powder transported is compressed and the air leakage channel is cut off. Structure of screw feed device. In the cast iron housing 3 with bushing, there is a section of variable pitch screw shaft 4, and its right end is connected with the motor 5 through an elastic coupling. When the screw rotates rapidly in the shell, the material is pressed into the material conveying pipe 6 through the screw through the gate L from the top feeding hopper 2. The conveying pipe is connected with the conveying pipe of the pneumatic conveying device, and the materials are sent into the pneumatic conveying system. As the screw pitch gradually decreases from left to right, the material entering the screw is pressed more and more tightly, which can prevent the compressed air in the pneumatic conveying pipeline from leaking out through the screw. After the material enters the pneumatic conveying system, it meets with the compressed air and blows away, which accelerates the material to form a mixture of compressed air and material, and evenly enters the conveying pipeline of the pneumatic conveying system to transport materials under the driving of high-speed air flow. 3.3 most of the program design system programs are compiled by ladder diagram, and function block and statement table are used for simulation calculation and output. Ladder diagram is intuitive and easy to understand. RS trigger and time relay are commonly used. In programming, it is only necessary to analyze and find sy setting and reset conditions, so that each controlled (PLC output) can be written in sequence. This can make the program concise and reduce the chance of programming errors.
After the first dosing of dfy in LYJY-ZS oilfield water injection and dosing device, it can automatically judge whether the dosing device is on or off (after the first injection, dfy is automatically added)? If df23 is closed, it means that when No. 2 tank injects chemicals into the pipeline, No. 1 tank can supply water, add chemicals and mix; if df23 is on, it means that No. 1 tank can inject chemicals into the pipeline, and No. 2 tank can supply water, add chemicals and mix). The liquid level of dosing tank Z is not high, the water level of dosing tank is not high, the water level of dosing tank is not high, and the water level of dosing tank is not high. When the liquid level of the dosing tank reaches Z high level, the sensor sends a signal, the water adding motor stops, the water inlet solenoid valve is closed, and the water adding process is finished. After that, the dosing motor and mixer start at the same time. Timer KF3 and kf4 are started. After a certain delay, the dosing motor stops first, and the mixer stops after mixing for a certain time. The process of dosing and mixing was completed. Add water, add medicine and stir in No.1 tank, wait. During the dosing process of No.2 tank, when Z low liquid level alarm is given, a signal request is sent to close the dosing valve df24 of No.2 tank and open the dosing valve df23 of No.1 tank. The No.1 tank injects chemicals into the pipeline to realize automatic water adding, and the dosing and mixing of No.2 tank are carried out at fixed time. Complete the pouring process. The ladder diagram of dosing system is 6. Conclusion in the system design of LYJY-ZS oilfield water injection and dosing device, the working information of each link is transmitted to the PLC control system, so that the dosing system can run automatically, the concentration of liquid medicine is constant and the dosing is accurate. The automation of dosing tank is realized, the work efficiency is greatly improved, the labor intensity of workers is reduced, and the harm of chemicals to human body is reduced. At the same time, the device has the advantages of compact structure, rich configuration, simple installation and high reliability. LYJY-ZS oilfield water injection and dosing device is a kind of high automation reagent dosing system. The purpose of this paper is to find a product with higher practical value and wider application prospect, so as to realize the unification of environmental and economic benefits. The above is the application of ZILMET-LMG series metering pump in LYJY-ZS oilfield water injection and dosing device, as well as the working principle and process flow of LYJY-ZS oilfield water injection and dosing device. Welcome more metering pumps and water injection dosing devices to negotiate with Shanghai Longya technology department.