High-pressure dirt flushing multi-tube pass shell-and-tube heat exchange equipment and high-pressure dirt flushing method

Abstract

The invention relates to high-pressure dirt flushing multi-tube pass shell-and-tube heat exchange equipment and a high-pressure dirt flushing method. The equipment comprises a shell, a heat exchange tube bundle, a left tube plate, a right tube plate, a left end socket, a right end socket and tube pass partition plates, wherein the tube pass partition plates in the right end socket consist of a folding seal tube pass partition plate and a right tube pass fixed partition plate which is connected with the folding seal tube pass partition plate; a hollow main shaft is arranged in the right end socket; the front part of the hollow main shaft is provided with a flushing spray nozzle capable of rotating in a cylindrical barrel body; a plurality of nozzles are distributed on the flushing spray nozzle; the rear part of the hollow main shaft is provided with an annular cavity water guiding sleeve communicated with a water inlet hole; and the tail part of a hollow rotating shaft is provided withchain transmission equipment. In the multi-tube pass shell-and-tube heat exchange equipment, high-pressure clean water is conveyed by utilizing a high-pressure pump, and the tube pass partition plates are opened and closed by a knob; and the flushing spray nozzle is driven to rotate by the chain transmission equipment to flush a heat exchange tube. The multi-tube pass shell-and-tube heat exchangeequipment has a simple structure and is convenient to operate, and dirt in the multi-tube pass shell-and-tube heat exchange equipment can be removed under the condition that the multi-tube pass shell-and-tube heat exchange equipment is not disassembled, so the working efficiency of the equipment is improved greatly.

Description

technical field [0001] The invention relates to a high-pressure decontamination multi-tube pass shell-and-tube heat exchange device and method, in particular to a mechanical decontamination device and method suitable for multi-tube pass heat exchange equipment. Background technique [0002] The development and utilization of new green and renewable energy is an important means to achieve energy conservation and emission reduction, and to build a low-carbon economy. Due to its excellent economical and energy-saving properties, the application of urban sewage cold and heat source systems is becoming more and more extensive. However, system fouling has become a major obstacle to the popularization and application of this system. Fouling reduces the energy saving effect of the system by about 40%. The effects of dirt are also serious in other areas. Especially when the fluid in the pipe contains a large amount of substances that are prone to fouling, the fouling formed on the...

AI Technical Summary

Problems solved by technology

This method is not only time-consuming and labor-intensive, but also inefficient

When the heat exchange equipment has many tubes and the volume is too large, it is difficult to meet the needs of production by manual cleaning.

Although the existing mechanical on-line flushing technology can achieve a more convenient cleaning process, it also has obvious disadvantages: (1) Due to the limitation of the tube side partition, it can only be applied to the heat exchange of up to two tube sides equipment

Too few tube passes lead to large flow rate of heat exchange medium and small temperature change. Taking the heat extraction and heat exchange equipment of urban sewage cold and heat sources as an example, the shell and tube heat exchanger with the same volume and 6 tube passes can meet the sewage temperature drop of 6~8K. Design requirements, while the temperature drop of the sewage in the two tubes is only 1~2K, to get the same amount of heat, the heat exchange equipment in the two tubes needs 4~5 times the sewage flow, and at the same time increases the pump consumption

Sewage is also a very limited resource, which is obviously unacceptable; (2) The opening area of ​​the flushing nozzle is too large. In actual use, the amount of water that can be injected into the heat exchange tube and its flow rate are very limited, resulting in a mediocre flushing effect

The area of ​​the flushing equipment is too large, occupying too much space in the tube, making the flow area smaller, and it will also lead to excessive local resistance in the tube during heat exchange work, which will affect the normal operation of the heat exchange equipment; (3) generally use non-clean water

Unclean water contains a large number of solid particles, which will produce cutting effect when flushing at high speed, which will seriously damage the heat exchange equipment

In addition, it has been proved by experiments that the flushing effect of unclean water is very limited

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