GB/T 28712.4-2023Types and basic parameters of heat exchangers—Part 4: Thermo-siphon reboilers (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document is Part 4 of GB/T 28712 "Heat exchanger types and basic parameters". GB/T 28712 has released the following part.

---Part 1: Floating head heat exchanger;

---Part 2: Fixed tube plate heat exchanger;

---Part 3: U-shaped tube heat exchanger;

---Part 4: Thermosiphon reboiler;

---Part 5: Spiral plate heat exchanger;

---Part 6: Air-cooled heat exchanger.

This document replaces GB/T 28712.4-2012 "Heat exchanger types and basic parameters - Part 4: Vertical thermosiphon reboiler", Compared with GB/T 28712.4-2012, the standard name has been changed from "vertical thermosiphon reboiler" to "thermosiphon reboiler".

In addition to structural adjustments and editorial changes, the main technical changes are as follows.

---Added nominal diameter DN series (see 5.1);

---Increased the length of heat exchange tube L series (see 5.3.1);

---Changed the heat exchange tube specifications (see 5.3.2, 4.3.2 of the 2012 edition);

---Changed the baffle (support plate) spacing (see 5.5, 2012 version of 4.5);

---Added the basic parameter combination of horizontal thermosiphon reboiler (see 5.6.2).

Introduction

GB/T 28712 "Heat exchanger types and basic parameters" aims to standardize the typical structural types of heat exchangers used in the energy industry, fully considering the installation In line with the development trend of large-scale installations, taking into account the product standards and construction level of my country's heat exchangers, the applicable range of parameters and their supporting dimensions are clarified. consider The functions, structures, and parameters of different heat exchangers are obviously different, and they are composed of six parts.

---Part 1: Floating head heat exchanger.

---Part 2: Fixed tube plate heat exchanger.

---Part 3: U-shaped tube heat exchanger.

---Part 4: Thermosiphon reboiler.

---Part 5: Spiral plate heat exchanger.

---Part 6: Air-cooled heat exchanger.

Heat exchanger type and basic parameter standards are of great significance to the realization of standardization, serialization, generalization and scale of heat exchangers in my country. righteous. For large-volume and wide-ranging heat exchanger products, the standardization of their structures and parameters can first promote the standardization of product construction, improve design quality, efficiency; secondly, it can save tools, tooling, material consumption and backlog in manufacturing and use; finally, it can facilitate users to select and use products.

Replacement, repair and interchange. In recent years, the construction of large-scale refining and chemical integration projects in our country has entered a period of rapid development. As a typical energy-consuming equipment The usage of heat exchangers has increased significantly; the large-scale installation has pushed the structural size of heat exchangers to new heights, and the demand for large-scale single equipment is increasing.

Outstanding; the construction and implementation of a large number of engineering projects has accumulated rich experience in design, manufacturing and engineering application for the construction of heat exchangers.

GB/T 151 "Heat Exchanger" has also been revised accordingly, forming for the first time a comprehensive product standard that comprehensively covers the typical structure of heat exchangers, and Applicable parameters have been significantly adjusted. To this end, it is necessary to revise the heat exchanger type and basic parameter standards to adapt to industry and standard development. exhibition needs.

This document focuses on expanding the applicable scope of vertical thermosiphon reboiler types and parameters based on current product standards and industry common needs.

Including nominal diameter, heat exchange tube length, etc., the type and basic parameters of the horizontal thermosyphon reboiler are added, and the corresponding supporting dimensions are given to comply with The development requirements for large-scale and diversified types of equipment in various fields meet the urgent needs of industrial upgrading and development; through the integrity of standard data And normative expansion, combined with the principle of energy conservation and consumption reduction, has a positive impact on promoting the digitalization and green development of the industry and improving the level of standardization. effect.

1 Scope

This document specifies the type and basic parameters of the thermosiphon reboiler (hereinafter referred to as "reboiler").

This document applies to carbon steel, low alloy steel, stainless steel, aluminum, copper and titanium reboilers for petroleum, chemical industry, refrigeration, and other Other industries use similar reboilers.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 151 heat exchanger

3 Terms and definitions

The terms and definitions defined in GB/T 151 apply to this document.

4 Types

4.1 The structural diagram of the vertical thermosiphon reboiler is shown in Figure 1. The structural diagram of the horizontal thermosyphon reboiler is shown in Figure 2, Figure 2b) Middle shell side inlet and outlet The number of takeovers is determined based on process calculations.

4.2 Models and parts names shall comply with the provisions of GB/T 151.