Small-sized front end seal head channel box cleaning machine

Abstract

The invention provides a small-sized front end seal head channel box cleaning machine which comprises a seal head channel box, a receiving and launching control mechanism, a control cabinet, a water inlet pipe and a water outlet pipe. The water inlet pipe and the water outlet pipe are arranged on the seal head channel box. The control cabinet is used for controlling the receiving and launching control mechanism. Rubber balls are launched and recycled through the receiving and launching control mechanism, so that online cleaning is facilitated. Compared with the prior art, the small-sized front end seal head channel box cleaning machine is suitable for small-sized water chilling units with the specification of seal head channel boxes being lower than DN650, the functions of the seal head channel box are achieved, and the functions of automatic rubber ball online cleaning, inlet water filtering and sewage drainage are also achieved; the functions of adjusting the cleaning frequency, period, starting and stopping manually and the like are achieved in the automatic cleaning process; and the whole device is easy to operate, compact in structure and reliable in operation, the rubber balls can be recycled and launched through the hydraulic principle and the pressure difference between inlet cooling water and outlet cooling water, energy is saved, environmental friendliness is achieved, and the cost is low.

Description

technical field [0001] The invention discloses a small front-end head pipe box cleaning machine with the function of on-line cleaning of rubber balls, which is especially suitable for small double-flow water-cooled chiller shell-and-tube condensers, and is also suitable for small double-flow shell-and-tube type flooded evaporators , and a small double-flow water-cooled shell-and-tube heat exchanger whose cooling water goes through the tube and the temperature does not exceed 80°C. Background technique [0002] Shell-and-tube condensers, shell-and-tube flooded evaporators, and shell-and-tube heat exchangers are very common in the energy, chemical industry, and HVAC fields. Scaling often occurs on the inner wall of these tubes that use water as the cooling medium. The scale thermal resistance occupies a large part of the total thermal resistance of heat transfer, and the heat transfer efficiency is reduced, resulting in energy waste. [0003] There are three types of automa...

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Problems solved by technology

[0002] Shell-and-tube condensers, shell-and-tube flooded evaporators, and shell-and-tube heat exchangers are very common in the energy, chemical industry, and HVAC fields. Scaling often occurs on the inner wall of these tubes that use water as the cooling medium. The scale thermal resistance occupies a large part of the total thermal resistance of heat transfer, and the heat transfer efficiency is reduced, resulting in energy waste

[0003] There are three types of automatic on-line cleaning methods for the existing shell-and-tube condenser, evaporator and heat exchanger. The first type is an independent cleaning system device. Taking the shell-and-tube condenser as an example, it is connected with the condenser. The water pipes are connected through pipes, and the ball machine sends the rubber balls to the water inlet pipe of the cooling water. The rubber balls flow into the condenser with the cooling water, and after cleaning, they flow out from the cooling water outlet, enter the ball catcher, and then enter the ball machine. The cleaning device is mainly installed on the connecting pipe of the chiller; the second type is to install a four-way reversing device at the inlet and outlet of the condenser. Reciprocating motion to clean the inner wall of the heat exchange tube, for example, a four-way reversing valve used on the cleaning pipeline of the shell and tube heat exchanger provided by the publication number CN202955276. There are two disadvantages in this type of automatic cleaning device by changing the flow direction: 1. , High-temperature water enters the condenser when reversing, the condensation temperature of the refrigerant in the condenser of the chiller changes greatly instantaneously, and the instantaneous efficiency of the chiller fluctuates greatly, which brings a large impact on the operation of the chiller, and in severe cases causes surge of the chiller, etc. Side effects; 2. Due to the distribution of the water flow field in the condenser flower plate, the flow rate in each heat exchange tube is different, so after running for a period of time, some cleaning elements cannot perform reciprocating cleaning movements and are stuck in the blocking element; the third category It is a head box at the front end of the shell-and-tube condenser of a water-cooled chiller with an on-line cleaning function of rubber balls. It is suitable for large-scale chillers with head pipe box specifications above DN650, because the front end head pipe box is limited by the structure, and the manufacturing cost below DN650 is relatively high

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