一、設(shè)備簡介

1、 Equipment introduction

電去離子Electrodeionization，簡稱EDI，又稱連續(xù)電解除鹽技術(shù)，它地將電滲析技術(shù)和離子交換技術(shù)融為一體，通過陰、陽離子的選擇透過作用以及離子交換樹脂對水中離子的交換作用，在電場的作用下實現(xiàn)水中離子的定向遷移，從而達到水的深度凈化除鹽，并通過水電解產(chǎn)生的氫離子和氫氧根離子對裝填樹脂進行連續(xù)再生，因此EDI制水過程不需酸、堿化學(xué)藥品再生即可連續(xù)制取高品質(zhì)超純水。

EDI (electrodeionization for short) is also called continuous electrolysis desalination technology. It integrates electrodialysis technology and ion exchange technology. Through the selective permeation of anion and cation and the ion exchange of ion exchange resin in water, the directional migration of ions in water is realized under the action of electric field, so as to achieve the deep purification and desalination of water, The resin was regenerated continuously by hydrogen ion and hydroxyl ion produced by water electrolysis. Therefore, the EDI water production process can continuously produce high-quality ultra pure water without acid and alkali chemicals regeneration.

半導(dǎo)體、集成電路芯片及封裝、液晶顯示、高精度線路板、光電器件、各種電子器件、微電子工業(yè)、大規(guī)模、超大規(guī)模集成電路需用大量的純水、高純水、超純水清洗半成品、成品。集成電路的集成度越高，線寬越窄，對水質(zhì)的要求也越高。目前我國電子工業(yè)部把電子級水質(zhì)技術(shù)分為五個行業(yè)等級，分別為18MΩ.cm、15MΩ.cm、10MΩ.cm、2MΩ.cm、0.5MΩ.cm，以區(qū)分不同水質(zhì)。

Semiconductors, integrated circuit chips and packages, liquid crystal displays, high-precision circuit boards, optoelectronic devices, various electronic devices, microelectronics industry, large-scale and ultra large-scale integrated circuits need a lot of pure water, high-purity water and ultra pure water to clean semi-finished products and finished products. The higher the integration of integrated circuit, the narrower the line width, and the higher the requirement of water quality. At present, China's Ministry of electronic industry divides electronic grade water quality technology into five industry grades, namely 18m Ω. cm、15M Ω. cm、10M Ω. cm、2M Ω. cm、0.5M Ω. Cm to distinguish different water quality.

二、設(shè)備原理

2、 Equipment principle

電去離子(EDI)系統(tǒng)主要是在直流電場的作用下，通過隔板的水中電介質(zhì)離子發(fā)生定向移動，利用交換膜對離子的選擇透過作用來對水質(zhì)進行提純的一種的水處理技術(shù)。電滲析器的一對電極之間，通常由陰膜，陽膜和隔板(甲、乙)多組交替排列，構(gòu)成濃室和淡室(即陽離子可透過陽膜,陰離子可透過陰膜)。淡室水中陽離子向負(fù)極遷移透過陽膜,被濃室中的陰膜截留;水中陰離子向正極方向遷移陰膜,被濃室中的陽膜截留，這樣通過淡室的水中離子數(shù)逐漸減少，成為淡水，而濃室的水中，由于濃室的陰陽離子不斷涌進，電介質(zhì)離子濃度不斷升高，而成為濃水，從而達到淡化、提純、濃縮或精制的目的。

Electrodeionization (EDI) system is a kind of water treatment technology, which is mainly under the action of DC electric field, the dielectric ions in the water through the separator move directionally, and the water quality is purified by using the selective penetration of ion by exchange membrane. Between a pair of electrodes of an electrodialyzer, there are usually many groups of negative membrane, positive membrane and separator (A and b) alternately arranged to form a concentrated chamber and a dilute chamber (that is, cation can pass through the positive membrane and anion can pass through the negative membrane). The cation in the dilute chamber migrates to the negative electrode, passes through the positive membrane and is intercepted by the negative membrane in the concentrated chamber; The anions in the water migrate to the positive membrane and are intercepted by the positive membrane in the concentration chamber. In this way, the number of ions in the water passing through the thin chamber gradually decreases and becomes fresh water. However, the water in the concentration chamber becomes concentrated water due to the continuous inflow of anions and anions in the concentration chamber and the increasing concentration of dielectric ions, so as to achieve the purpose of desalination, purification, concentration or refinement.

三、工藝流程

3、 Process flow

1、如圖片“工藝流程圖---EDI“

1. Such as the picture "process flow diagram EDI"“

四、技術(shù)參數(shù)

4、 Technical parameters

產(chǎn)水量

Water yield

根據(jù)需求訂制（0.5-300噸/時）

Customized according to demand (0.5-300 T / h)

原水源

Raw water source

自來水或地下水（電導(dǎo)率小于400us/cm）

Tap water or groundwater (conductivity less than 400us / cm)

產(chǎn)水水質(zhì)

Quality of produced water

電導(dǎo)率小于0.056us/cm(電阻率≥18MΩ/cm)

The conductivity is less than 0.056us/cm (resistivity ≥ 18m) Ω/ cm)

設(shè)備功率

Equipment power

5KW-800KW

5KW-800KW

運行狀態(tài)

running state

自動運行、定時反洗

Automatic operation and timing backwashing

反洗頻率

Backwash frequency

隨進水水質(zhì)而變化（1～3天）

Change with influent water quality (1-3 days)

化學(xué)清洗

chemical cleaning

隨膜材質(zhì)及膜污染情況而定

It depends on membrane material and membrane fouling

產(chǎn)品特點

Product features

人機對話、運行穩(wěn)定、水質(zhì)可靠

Man machine dialogue, stable operation and reliable water quality

進水要求：

Water inlet requirements:

以下是保證 EDI 正常運行的條件。為了使系統(tǒng)運行效果更佳，系統(tǒng)設(shè)計時應(yīng)適當(dāng)提高這些條件。

The following are the conditions to ensure the normal operation of EDI. In order to make the system work better, these conditions should be properly improved in system design.

★給水：RO 純水，一般水的電導(dǎo)率為 4-30us/cm。

Water supply: RO pure water, the conductivity of general water is 4-30us / cm.

★PH：5.0-8.0(在此 PH 條件下，水硬度不能太高)

★ pH: 5.0-8.0 (under this pH condition, the water hardness should not be too high)

★溫度：5-35℃

Temperature: 5-35 ℃

★進水壓力：為 4kg/cm2(60psi)，小為 1.5kg/cm2(25psi)。

Water inlet pressure: 4kg / cm2 (60psi), 1.5kg/cm2 (25psi).

注意：組件壓力損失取決于流量和水溫。

Note: component pressure loss depends on flow and water temperature.

EDI 組件標(biāo)準(zhǔn)配置：

EDI component standard configuration:

★出水壓力：濃水和電極水的出口壓力必須低于產(chǎn)品的出口壓力。

Outlet pressure: the outlet pressure of concentrated water and electrode water must be lower than that of the product.

★硬度（以 CaCO3 計）：為 1.0ppm，建議采用 0.1ppm。

Hardness (based on CaCO3): 1.0ppm, 0.1ppm is recommended.

★物：為 0.05ppm (TOC)。

05 ppm (TOC).

★氧化劑：為 0.05ppm（CL2），0.02ppm（03）建議兩者都沒有。

The oxidant: 0.05ppm (Cl2) and 0.02ppm (03). It is recommended that there is neither.

★變價金屬：為 0.01 ppm (Fe)。

Variable metal: 0.01 ppm (FE).

★二氧化硅：50-150ppb。

Silica: 50-150ppb.

★二氧化碳 CO2 的總量：二氧化碳含量和 PH 值將明顯影響產(chǎn)品水電阻率。在大于10ppm 時，一般應(yīng)在 EDI 設(shè)備前安裝脫氣裝置。

Total amount of carbon dioxide: carbon dioxide content and pH value will significantly affect the water resistivity of the product. When more than 10ppm, degassing device should be installed in front of EDI equipment.

五、設(shè)備優(yōu)點

5、 Equipment advantages

1、占地空間小，省略了混床和再生裝置。

1. The space occupied is small, and the mixed bed and regeneration device are omitted.

2、產(chǎn)水連續(xù)穩(wěn)定，出水質(zhì)量高，而混床在樹脂臨近失效時水質(zhì)會變差。

2. The produced water is continuous and stable, and the effluent quality is high, while the water quality of mixed bed will become worse when the resin is near failure.

3、運行費用低，再生只耗電，不用酸堿，節(jié)省材料費用。

3. The operation cost is low, the regeneration only consumes electricity, does not need acid and alkali, saves the material cost.

4、環(huán)保效益，增加了操作的安全性。

4. Environmental protection benefits, increase the safety of operation.

5、不需要酸堿化學(xué)試劑來再生(綠色環(huán)保)。

5. No acid-base chemical reagent is needed for regeneration (green environmental protection).

6、與同類進口產(chǎn)品比，能耗下降30%左右，節(jié)約運行費用。

6. Compared with similar imported products, the energy consumption is reduced by about 30% and the operation cost is saved.