CN215570359U

CN215570359U - Horizontal shell-and-tube type exhaust-heat boiler system of adding water

Info

Publication number: CN215570359U
Application number: CN202121374235.9U
Authority: CN
Inventors: 吕宏霞; 徐兆雷; 郭俊美; 姜丽
Original assignee: Doright Co ltd
Current assignee: Doright Co ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-01-18
Anticipated expiration: 2031-06-21

Abstract

The utility model discloses a horizontal shell-and-tube type waste heat boiler water adding system, which is characterized in that a cold water distribution pipe is additionally arranged in a steam drum, the cold water entering the steam drum is uniformly distributed at the bottom of the steam drum and has no impact on the inner wall of the steam drum, and the cold water at the bottom of the steam drum enters the bottom of a shell of a heat exchange section through a down pipe and a water falling groove. The cold water in the whole water adding process always falls on the bottom of the shell of the heat exchange section, then is converted into hot water through heat exchange with the heat exchange tube, and then enters the lower part of the steam drum to be subjected to steam-water separation, and the separated steam enters the upper part of the steam drum and then enters an external steam pipeline through a high-temperature steam outlet. After the waste heat boiler applying the water adding system is put into the market, the waste heat boiler is well received by users due to no vibration, no noise and the like during operation.

Description

Horizontal shell-and-tube type exhaust-heat boiler system of adding water

Technical Field

The utility model relates to a horizontal shell-and-tube type waste heat boiler with a steam drum for carbon black industry.

Background

For many years, the horizontal shell-and-tube type waste heat boiler widely used in the carbon black industry has the working process that the tail gas generated in the reaction process of the production line is subjected to heat exchange through the air preheater and then enters the tube pass of the waste heat boiler to heat water in the shell pass to generate high-temperature steam for production or life, and the high-temperature steam can be sold out, so that the purposes of energy conservation and consumption reduction are achieved, and a benefit is created for enterprises. The waste heat boiler water adding system mainly relates to a process that a steam drum, a heat exchange section shell and a set of cold water are vaporized through heat exchange with a heat exchange tube to generate high-temperature steam.

Disclosure of Invention

The utility model aims to design a horizontal shell-and-tube type waste heat boiler water adding system, which adopts the technical scheme that a cold water distribution pipe is additionally arranged in a steam drum, so that cold water entering the steam drum is uniformly distributed at the bottom of the steam drum without impacting the inner wall of the steam drum, and the cold water at the bottom of the steam drum enters the bottom of a shell of a heat exchange section through a down pipe and a water falling groove. The cold water in the whole water adding process always falls on the bottom of the shell of the heat exchange section, then is converted into hot water through heat exchange with the heat exchange tube, and then enters the lower part of the steam drum to be subjected to steam-water separation, and the separated steam enters the upper part of the steam drum and then enters an external steam pipeline through a high-temperature steam outlet.

The technical scheme adopted by the utility model is as follows:

a horizontal shell and tube type exhaust-heat boiler system of adding water includes: heat transfer section casing, tedge, steam pocket, cold water distribution pipe, downcomer, water falling groove, its characterized in that: the water inlet connecting pipe and the cold water distribution pipe form a steam drum water inlet assembly, so that the cold water entering the steam drum is uniformly distributed without impact; the down pipe and the water falling groove form a heat exchange section shell water inlet assembly, so that cold water entering the heat exchange section shell uniformly enters the bottom of the heat exchange section shell and then exchanges heat with the heat exchange pipe; the hot water after heat exchange enters the lower half part of steam-water separation of the steam drum through the ascending pipe, and the separated steam rises to the upper half part of steam drum vaporization and then enters a steam pipeline from a high-temperature steam outlet. After the waste heat boiler applying the water adding system is put into the market, the waste heat boiler is well received by users due to no vibration, no noise and the like during operation.

The design key points and advantages of the horizontal shell-and-tube type waste heat boiler water adding system provided by the utility model are as follows:

1. impact and disturbance on a water-vapor separation layer caused by cold water entering a steam drum are eliminated;

2. cold water entering the shell of the heat exchange section is gradually filled upwards from the bottom, so that no bubbles are generated on the surface of the heat exchange tube bundle, and the service life of the heat exchange tube is prolonged;

3. the vibration and noise of the equipment in operation are eliminated, the equipment can run stably, the on-site maintenance frequency and cost are reduced, and the service life of the equipment is prolonged;

4. the production process route of the utility model is as follows:

entering the steam drum through a manhole, connecting and fixing a cold water distribution pipe and a water inlet connecting pipe, welding a water falling groove in the heat exchange section shell, installing the steam drum on the heat exchange section shell, and connecting the steam drum and the heat exchange section shell by using a down pipe flange.

Drawings

FIG. 1 is a schematic diagram of a water feeding system of a horizontal shell-and-tube type exhaust-heat boiler of the utility model

FIG. 2 is a left side view of FIG. 1

The labels in the figure are: 1-heat exchange section shell, 2-ascending pipe, 3-steam drum, 4-cold water distribution pipe, 5-descending pipe, 6-water falling groove a-high temperature steam outlet, b₁、b₂Water inlet connecting pipe, A-flue gas inlet and B-flue gas outlet

Detailed Description

A horizontal shell and tube type exhaust-heat boiler system of adding water includes: the heat exchange section comprises a heat exchange section shell 1, an ascending pipe 2, a steam drum 3, a cold water distribution pipe 4, a descending pipe 5 and a downpipe groove 6.

Field installation:

1. in general, the steam drum and the heat exchange section are packaged and transported separately. After the equipment arrives at the site, a heat exchange section base is installed on a beated foundation, and foundation bolts are tightened by adjusting according to requirements;

2. installing the steam pocket on a base at the upper part of the heat exchange section, adjusting the steam pocket, and then installing a down pipe to connect the steam pocket and the heat exchange section together;

3. the flue gas inlet A and the flue gas outlet B are respectively connected with a field butt joint pipeline;

4. the water inlet connecting pipes b1 and b2 are connected with water treated by the deaerator on site through valves;

5. the high-temperature steam outlet a is connected to the main steam pipeline through a valve;

6. the shell side connecting pipe is provided with a safety valve, a pressure gauge, a thermometer, a liquid level meter and other instruments;

7. after the installation is finished, closing the externally connected valve, testing the pressure according to requirements, and checking each sealing part;

8. after meeting the requirements, all valves are opened, and a heat-insulating layer is additionally arranged on the shell side.

Claims

1. A horizontal shell and tube type exhaust-heat boiler system of adding water includes: heat transfer section casing (1), tedge (2), steam pocket (3), cold water distribution pipe (4), downcomer (5), groove (6) falls into water, its characterized in that: water inlet connecting pipe (b)₁、b₂) The cold water distribution pipe (4) and the steam drum (3) form a water inlet assembly, so that the cold water entering the steam drum (3) is uniformly distributed without impact; the down pipe (5) and the water falling groove (6) form a water inlet assembly of the heat exchange section shell (1), so that cold water entering the heat exchange section shell (1) uniformly enters the bottom of the shell and then exchanges heat with the heat exchange pipe; the hot water after heat exchange enters the lower half part of the steam-water separation of the steam drum (3) through the ascending pipe (2), and the separated steam rises to the upper half part of the steam drum vaporization and then enters a steam pipeline from the high-temperature steam outlet (a).

2. The horizontal type non-air-bag and smokeless-box shell-and-tube waste heat boiler is characterized in that: water inlet connecting pipe (b)₁、b₂) The cold water distribution pipe (4) and the steam drum (3) form a water inlet assembly, so that the cold water entering the steam drum (3) is uniformly distributed without impact;

3. the horizontal shell and tube type exhaust-heat boiler water feeding system of claim 1, characterized in that: the down pipe (5) and the water falling groove (6) form a water inlet assembly of the heat exchange section shell (1), so that cold water entering the heat exchange section shell (1) uniformly enters the bottom of the heat exchange section shell and then exchanges heat with the heat exchange pipe.