Steam superheater

Abstract

The utility model relates to the technical field of steam superheating equipment, in particular to a steam superheating furnace. The boiler comprises a boiler body, a plurality of combustors located at the bottom of the boiler body, a chimney pipe arranged at the top of the boiler body and a radiation coil pipe arranged on the outer wall of the boiler body. Wherein the radiation coil pipe is arranged on the outer side wall of the furnace body through a radiation steel structure, and a radiation lining for preserving heat of the radiation coil pipe is arranged on the radiation steel structure. According to the utility model, simultaneous heating of various kinds of steam is realized; the heating requirements of different kinds of steam on working condition change are met, the universality of the steam superheater is improved, and graded efficient utilization of energy is achieved.

Description

Technical Field

[0001] This utility model relates to the field of steam superheating equipment technology, and in particular to a steam superheating furnace. Background Technology

[0002] Coal gasification technology is a chemical technology that uses advanced technologies and processing methods to produce alternatives to petrochemical products and clean fuels. It involves converting coal into combustible gases.

[0003] Traditional coal chemical plants' gasifiers cannot directly generate superheated steam, requiring a separate coal-fired boiler for this purpose. The generated steam is used for power generation and to supply power to the plant's users. With the upgrading and innovation of gasifier technology, the emergence of semi-waste boiler gasifiers can produce a large amount of saturated steam as a byproduct. However, how to effectively utilize this saturated steam is a practical problem facing the energy industry. Utility Model Content

[0004] The purpose of this invention is to provide a steam superheater that solves the problem that conventional methods cannot be used to heat multiple different types of steam simultaneously.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This utility model provides a steam superheater, including a furnace body, a plurality of burners located at the bottom of the furnace body, a chimney tube disposed at the top of the furnace body, and a radiant coil disposed on the outer wall of the furnace body;

[0007] The radiant coil is installed on the outer wall of the furnace body via a radiant steel structure, and a radiant lining for heat preservation of the radiant coil is provided on the radiant steel structure.

[0008] In a further embodiment, the radiant coil is folded and arranged on the radiant steel structure; the radiant coil includes multiple independently heated tubes.

[0009] Furthermore, in this embodiment, a convection section pipe is provided at the top of the furnace body.

[0010] Furthermore, in this embodiment, an oil transfer line is also provided on the radiant steel structure. The oil transfer line is a connecting pipeline used to connect the radiant coil and the convection section pipeline. For example, a type of steam in the convection section pipeline is preheated through the convection section pipeline before entering the radiant coil for further heating.

[0011] In a further embodiment, a steel structure for supporting the radiant coil is provided on the furnace body.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0013] This invention solves the problem of simultaneously heating multiple types of steam; addresses the heating requirements of different steam types under varying operating conditions, improves the versatility of the steam superheater, and enables the efficient and graded utilization of energy. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the main structure of the steam superheater furnace of this utility model;

[0016] Figure 2 This is a side view of the steam superheater furnace of this utility model;

[0017] Figure 3 This is a top view of the convection section piping of the steam superheater of this utility model;

[0018] Figure 4 This is a three-dimensional schematic diagram of the steam superheater furnace of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Burner; 2. Radiant steel structure; 3. Radiant coil; 4. Radiant lining; 5. Oil transfer line; 6. Convection section piping; 7. Chimney tube; 8. Steel structure. Detailed Implementation

[0020] refer to Figure 1 This embodiment discloses a steam superheater furnace, including a furnace body, a plurality of burners 1 located at the bottom of the furnace body, a chimney pipe 7 installed at the top of the furnace body, and a radiant coil 3 installed on the outer wall of the furnace body; wherein the radiant coil 3 is installed on the outer wall of the furnace body through a radiant steel structure 2, and a radiant lining 4 for heat preservation of the radiant coil 3 is installed on the radiant steel structure 2.

[0021] In order to achieve greater energy saving, the radiant coil 3 surrounds the furnace body; the radiant coil 3 is designed as a coil arrangement, specifically arranged in the middle section of the furnace body and around the circumference of the furnace body.

[0022] Saturated steam is introduced into the radiant coil 3, which absorbs heat from the steam superheater, thereby achieving a superheating effect and providing steam heat.

[0023] In this embodiment, the radiant coil 3 is folded and arranged on the radiant steel structure 2, specifically in a "bow" shape or a "return" shape.

[0024] In this embodiment, in order to solve the problem of heating multiple different types of steam simultaneously, the radiant coil 3 includes multiple independently heated tubes; the radiant coil 3 is designed with multiple independent inlets and outlets; different types of steam (temperature and humidity parameters) flow through the radiant coil 3, and are heated simultaneously.

[0025] In practice, a convection section pipe 6 is installed on the top of the furnace body.

[0026] In this embodiment, an oil transfer line 5 is also installed on the radiant steel structure 2. The oil transfer line 5 is a connecting pipeline for connecting the radiant coil 3 and the convection section pipeline 6. For example, a type of steam in the convection section pipeline 6 is preheated by passing through the convection section pipeline 6 before entering the radiant coil 3 for further heating.

[0027] refer to Figure 4 In this embodiment, a steel structure 8 for supporting the radiant coil 3 is installed on the furnace body.

[0028] In operation, various types of saturated steam supplied from outside the unit enter different heating surfaces according to different operating temperature and pressure requirements. The heat source is provided by combustion equipment located in the radiant chamber, and the calorific value of the combustion equipment is automatically controlled according to the main steam requirements. Each steam inlet is equipped with regulating valves, flow meters, temperature and pressure gauges, while the outlet is equipped with a desuperheating system and a venting system. The regulating valves can adjust the saturated steam according to the outlet temperature and flow requirements. When the outlet steam temperature exceeds the set value, the outlet desuperheating system will adjust accordingly by spraying water to reduce the temperature. Multiple types of steam are heated simultaneously to meet the needs of users with different temperature levels. The superheated steam can be used for waste heat power generation or fed into other units for production.

[0029] On the other hand, this embodiment provides a novel multi-steam superheating device, which consists of a furnace shell structure, insulation layer, combustion equipment, radiant heating surface, convective heating surface, desuperheating system, venting system, control valves, and instruments. Any saturated steam can be individually set as the main superheating control point to meet the superheating temperature requirements of any type of steam. Simultaneously, it does not affect the quality requirements of other steam types.

[0030] After passing through the heat treatment unit, the saturated steam can be used by all steam users in the plant, while the remaining steam is used to power waste heat generators to generate electricity for all power users in the plant. This replaces the heavily polluting coal-fired boilers and achieves coupled utilization of resources and energy. On the other hand, the large amount of saturated steam produced by the semi-waste boiler gasification furnace is used by the entire plant, requiring only a portion of fuel gas to be used in the superheating process. This reduces the amount of fuel coal used and can significantly reduce sulfur dioxide emissions from coal-fired boilers, demonstrating clear advantages in energy conservation and emission reduction.

[0031] Taking a coal chemical plant with an annual olefin production capacity of 600,000 tons as an example, it can reduce fuel coal consumption by 102.88 t / h and produce 625 t / h of superheated steam as a byproduct. At the same time, it can reduce sulfur dioxide emissions by 199.7 t / a, nitrogen oxide emissions by 285.3 t / a, and particulate matter emissions by 57 t / a, resulting in a 56% reduction in pollutants.

[0032] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A steam superheater, characterized in that: It includes a furnace body, multiple burners (1) located at the bottom of the furnace body, a chimney pipe (7) set at the top of the furnace body, and a radiant coil (3) set on the outer wall of the furnace body; The radiant coil (3) is provided on the outer wall of the furnace body via a radiant steel structure (2), and a radiant lining (4) for heat preservation of the radiant coil (3) is provided on the radiant steel structure (2).

2. The steam superheater according to claim 1, characterized in that: The radiant coil (3) is folded and arranged on the radiant steel structure (2); the radiant coil (3) includes multiple independently heated pipes.

3. The steam superheater according to claim 2, characterized in that: A convection section pipe (6) is provided at the top of the furnace body.

4. The steam superheater according to claim 3, characterized in that: An oil transfer line (5) connecting the convection section pipeline (6) and the radiant coil (3) is also provided on the radiant steel structure (2).

5. The steam superheater according to claim 1, characterized in that: A steel structure (8) for supporting the radiant coil (3) is provided on the furnace body.

Images