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厂家传授如何清除壳管式冷凝器水垢?

人气:3 评论:0 日期:2019-08-30 11:42:47

冷凝器在长时间使用后很容易出现管道形成水垢的现象,如果没有及时处理掉,这些水垢会影响换热效果,导致机组的冷凝温度升高,进而导致制冷量降低、机组电耗增加,如下图。因此冷凝器应该经常进行水垢清除。预防和清除水垢的方法大致有以下三种:

Condenser is prone to scale formation in pipeline after long-term use. If not disposed of in time, these scales will affect the heat transfer effect and lead to the increase of condensation temperature of the unit, which will lead to the reduction of refrigeration capacity and the increase of power consumption of the unit, as shown in the following figure. Therefore, the condenser should often remove scale. There are three ways to prevent and remove scale: 方法一、机械除垢法:

Method 1. Mechanical descaling method:

机械除垢是用软轴洗管器对钢制冷却管的冷凝器进行除垢的方法,特别适用立式壳管式冷凝器

Mechanical descaling is a method of descaling the condenser of steel refrigeration tube by using soft-axle pipe washer, especially for vertical shell-tube condenser.

操作方法是:

The operation method is as follows:

1、将冷凝器中的制冷剂抽出。

1. Extract the refrigerant from the condenser.

2、关闭冷凝器与制冷系统连接的所有阀门。

2. Close all valves connected with the refrigeration system.

3、冷凝器的冷却水正常供给。

3. Normal supply of cooling water for condenser.

4、用软轴洗管器联接的伞型齿轮状刮刀在冷凝器的立管内由上而下地进行旋转滚刮除垢,并借助循环冷却水来冷却刮刀与管壁磨擦产生的热量,同时将清除下来的水垢、铁锈等污物冲洗入水池。

4. The bevel gear-shaped scraper connected with the soft-shaft pipe washer rotates from top to bottom in the standpipe of the condenser to remove scales. The heat generated by the friction between the scraper and the pipe wall is cooled by circulating cooling water. At the same time, the scales, rust and other dirt removed are washed into the pool.

在除垢过程中根据冷凝器的结垢厚度和管壁的锈蚀程度及已使用的年限长短来确定所选用适当直径的滚刀,但在一遍除垢所选用的滚刀直径比冷却管内径要适当小一些,以防损伤管壁,再选用与冷却管内径接近的滚刀进行第二遍除垢,这两遍除垢就能清除冷凝器95%以上的水垢和污锈。

In the process of descaling, the appropriate diameter hob is selected according to the thickness of scaling, the corrosion degree of tube wall and the length of service life. However, the diameter of the hob used in the first descaling is smaller than that of the cooling pipe in order to prevent damage to the tube wall, and the hob which is close to the diameter of the cooling pipe is selected for the second time. After all scale removal, more than 95% of the scale and rust in the condenser can be removed by these two scales removal.


这种机械除垢的方法是利用伞型齿轮状滚刀在冷却管内旋转进刀过程中的滚刀转动和震动,将冷凝器冷却管中的水垢和污锈等清除掉,待除垢结束后将冷凝水池中的水全部抽掉,从池底把清除下来的垢、锈等污物清理干净,并重新注水。

The mechanical descaling method is to remove the scale and rust in the cooling pipe of the condenser by means of the rotation and vibration of the hob in the process of rotating the bevel gear hob into the cooling pipe. After the descaling, the water in the condensation pool will be pumped out, and the dirt and rust removed from the bottom of the pool will be cleaned up. Re-inject water.

方法二、化学酸洗除垢法:

Method 2. Chemical acid cleaning and scale removal method:

用配制好的弱酸性除垢剂对冷凝器进行清洗,使水垢脱落,提高冷凝器的传热效率。

The condenser is cleaned with the prepared weak acid scale remover to make the scale fall off and improve the heat transfer efficiency of the condenser.

操作方法是:

The operation method is as follows:

1、在酸洗槽内配制好除垢溶液,开动酸洗泵,使除垢剂溶液在冷凝器的冷凝管中循环流动24小时后,一般情况下24小时后水垢基本清除干净。

1. The scale removal solution is prepared in the pickling tank and the pickling pump is operated to make the scale removal solution circulate in the condensation tube of the condenser for 24 hours, and the scale is basically cleaned up after 24 hours in general.

2、停止酸洗泵工作后,用圆形钢刷在冷凝管器的管壁内来回拉刷,并用清水将垢、锈冲洗干净。

2. After stopping the pickling pump, use circular steel brush to pull back and forth in the wall of the condenser, and rinse the scale and rust with clean water.

3、再用清水反复清洗残留在管内的除垢剂溶液,直至彻底干净。化学酸洗除垢方法适用于立式和卧式壳管式冷凝器。

3. Re-use clean water to repeatedly clean the residual detergent solution in the pipe until it is completely clean. Chemical pickling method is suitable for vertical and horizontal shell-and-tube condensers.

方法三、电子磁水除垢法:

Method 3. Electron magnetic water descaling method:

电子磁水器的工作原理是将流经冷凝器的冷却水中的钙、镁和其它盐类在常温下以正负离子状态溶解于水中。

The working principle of the electronic magnetizer is to dissolve calcium, magnesium and other salts in the cooling water flowing through the condenser at room temperature in a positive and negative ion state.

当冷却水以一定的的速度流经磁水器的横向磁场时,溶解的钙、镁等离子获得感应电能,使其电荷状态发生变化,离子间的静电引力受到干扰和破坏,这样就改变了其结晶条件,使晶体的结构疏松,抗拉、抗压能力降低,不能形成粘结力强的坚硬水垢,成为松散的泥渣随冷却水的流动而排出。

When the cooling water flows through the transverse magnetic field of the magnetizer at a certain speed, the dissolved Ca and Mg plasma obtains induced electric energy, which changes its charge state, disturbs and destroys the electrostatic attraction between ions, thus changing its crystallization conditions, making the crystal structure loose, and reducing its tensile and compressive resistance. The hard scale with strong cohesion is formed, and the loose sludge is discharged with the flow of cooling water.

这种除垢方法既能有效地防止新水垢的产生,而且还能清除原有的水垢,因为使用电子磁水器后,离子失去了结垢能力,这就对原有水垢失去了保护作用。另外经过磁化了的冷却水具有了一定的感应电能,同时由于冷凝器中的钢管与水垢的膨胀系数不同,使原有水垢逐渐发生龟裂,磁化水又不间断地侵入其裂缝中,破坏了原有水垢的粘着力,使之逐渐疏松而自行脱落并不断地被循环冷却水带走。

This scale removal method can not only effectively prevent the formation of new scale, but also remove the original scale, because the use of electronic magnet, the ion lost scaling ability, which lost the protection of the original scale. In addition, the magnetized cooling water has certain inductive electric energy. At the same time, due to the different expansion coefficients between the steel pipe and the scale in the condenser, the original scale gradually cracks, and the magnetized water continuously invades the cracks, destroying the adhesion force of the original scale, making it gradually loose and self-falling off and constantly being subjected to. Circulating cooling water is taken away.

电子磁水器的除垢方法简便易行、劳动强度低,而且在不影响制冷系统正常运转的情况下进行除垢和预防结垢。

The scale removal method of the electronic magnet water heater is simple and easy, and the labor intensity is low. Besides, the scale removal and scale prevention can be carried out without affecting the normal operation of the refrigeration system.

除垢与节能的意义:

Significance of scale removal and energy saving:

冷凝器一旦结了水垢,则导热热阻增大,于是热阻增加,传热系数值就要减少,因为冷凝温度与传热系数成反比,所以造成冷凝器温度升高,冷凝压力也相应增高,并且冷凝器结垢越严重,冷凝压力就越显著地增高,这样就使制冷机耗电增加,并造成制冷系统各运转设备的耗电相应的增加,造成电能浪费。

Once the condenser is scaled, the thermal conductivity resistance increases, so the thermal resistance increases and the value of heat transfer coefficient decreases. Because the condensation temperature is inversely proportional to the heat transfer coefficient, the temperature of the condenser rises and the condensation pressure increases accordingly. The more serious the scaling of the condenser is, the higher the condensation pressure will be. The increase of power consumption of refrigerators results in the corresponding increase of power consumption of refrigeration system operation equipment, resulting in energy waste.

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