Desuperheater for steam boiler
By designing a steam boiler temperature reducer including casing, annular tube, atomization nozzle and cooling pipe, the problem of low steam reduction efficiency of large-scale boilers in the prior art is solved, multiple temperature reduction of superheated steam is achieved, and the temperature reduction efficiency and service life are improved.
Patent Information
- Application Number
- CN202421800492.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-29
AI Technical Summary
When existing temperature reducers reduce the steam of large boiler, they cannot meet the demand for steam reduction, and the structure type is single, resulting in the steam reduction temperature not meeting production requirements.
A steam boiler temperature reducer including casing, annular tube, atomization spray head and a cooling pipe is designed. The superheated steam is reduced by one through the annular tube and atomization spray head, and the steam is reduced by secondly through the cooling pipe to achieve multiple cooling.
It improves the temperature reduction efficiency and service life, avoids the disadvantages of a single temperature reduction structure, realizes multiple temperature reductions of superheated steam, and meets production needs.
Smart Images
Figure CN222849214U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler equipment, in particular to a desuperheater for a steam boiler. Background Art
[0002] A boiler desuperheater is a device that uses water as a cooling medium to regulate the temperature of superheated or reheated steam. Its function is to control and maintain the superheated steam temperature or reheated steam temperature at a specified value and prevent the superheater and reheater tube walls from being heated. Desuperheaters are divided into two types: surface desuperheaters and water spray desuperheaters. Surface desuperheaters are partition-type heat exchangers with U-shaped tubes or coiled tubes installed in a cylindrical barrel. They are prone to thermal fatigue and have large adjustment delays during use and are suitable for low and medium pressure boilers. Water spray desuperheaters include Venturi-type and flute-type desuperheaters, etc. The principle is to spray cooling water directly into the superheated steam flow to achieve the purpose of steam cooling. However, the nozzle is arranged in a cantilever manner. Long-term steam scouring will cause resonance and nozzle breakage, and a small amount of cooling water will have a short contact time with steam, which will affect the cooling effect of the desuperheater.
[0003] However, with the development of boiler production capacity, the desuperheater in the prior art cannot meet the demand for steam desuperheating when desuperheating the steam in a large boiler. The single structure type makes the steam desuperheating temperature still unable to meet the production requirements. In order to improve the working efficiency of the desuperheater, a desuperheater for a steam boiler is now provided to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a desuperheater for a steam boiler in view of the above problems, which can desuperheat the superheated steam for multiple times, thereby improving the desuperheating efficiency and service life.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:
[0006] The utility model discloses a desuperheater for a steam boiler, comprising a sleeve in which a steam inner cavity is arranged, a water inlet pipe and a water outlet pipe are fixedly arranged on the outer side walls of the steam inlet end and the steam outlet end of the sleeve, respectively, a first annular pipe and a second annular pipe are arranged in the inner cavity of the sleeve, the first annular pipe and the second annular pipe are arranged in an annular manner along the circumference of the sleeve, and are respectively arranged at the steam inlet end and the steam outlet end of the sleeve, the outer peripheral end faces of the first annular pipe and the second annular pipe are fixedly connected to the inner wall of the sleeve, the water inlet pipe and the water outlet pipe are respectively communicated with the first annular pipe and the second annular pipe, a plurality of atomizing nozzles are fixedly arranged on the inner peripheral end face of the first annular pipe, the plurality of atomizing nozzles are arranged at intervals along the circumference of the first annular pipe, a plurality of cooling pipes are arranged between the first annular pipe and the second annular pipe, the cooling pipes are arranged to extend along the axial direction of the sleeve, and the two ends thereof are respectively communicated with the first annular pipe and the second annular pipe.
[0007] In one embodiment, the first annular tube is a rectangular or square tube structure.
[0008] In one embodiment, the axial cross-section of the first annular tube is a trapezoidal structure, so that the diameter of the airflow column becomes smaller when the airflow passes through the first annular tube, and the plurality of atomizing nozzles are fixedly arranged on the end surface parallel to the axial direction.
[0009] In one embodiment, the axial cross-section of the first annular tube is a pentagonal structure, and its inner end surface is a V-shaped inclined surface structure. The plurality of atomizing nozzles are fixedly arranged on the inclined surface of the inner end surface of the first annular tube close to the cooling tube to protect the atomizing nozzles from being directly impacted by the airflow.
[0010] Furthermore, at least one reinforcement ring is provided between the first annular tube and the second annular tube, the reinforcement ring is arranged in an annular manner along the circumference of the casing, and its outer peripheral end surface is fixedly connected to the inner wall of the casing, and the reinforcement ring is provided with a plurality of fixing holes, and the plurality of fixing holes are used to fit a plurality of cooling tubes to pass through. Adding a reinforcement ring can improve the stability of the cooling tube and prevent the cooling tube from bending or contacting each other due to the high-temperature steam when the cooling tube is long.
[0011] Furthermore, the reinforcement ring is provided with a plurality of air outlet holes to prevent the reinforcement ring from blocking the passage of airflow.
[0012] Furthermore, flanges are provided at both ends of the sleeve for connecting with boiler pipes.
[0013] Furthermore, the number of the plurality of atomizing nozzles is 4 to 6, and they can all spray cooling water when in use.
[0014] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:
[0015] The utility model adopts an annular tube, an atomizing nozzle and a cooling tube structure. Part of the cooling water is sprayed out by the atomizing nozzle to reduce the temperature of the superheated steam once. At the same time, part of the cooling water enters the cooling tube. The tube wall of the cooling tube absorbs the heat of the superheated steam, thereby reducing the temperature of the superheated steam for a second time, so that the superheated steam reaches the required value. The utility model has a simple structure, realizes the secondary cooling of the superheated steam, and adopts two cooling methods at the same time, avoids the disadvantages of a single cooling structure, and improves the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0017] Figure 2 The utility model Figure 1 Top view of the .
[0018] Figure 3 It is a schematic diagram of the connection between the annular tube and the cooling tube of the utility model.
[0019] Figure 4 The utility model Figure 2 Sectional view at AA.
[0020] Figure 5 It is a schematic diagram of the reinforcement ring structure of the utility model.
[0021] Figure 6 This is a schematic diagram of the first annular tube structure of the utility model.
[0022] Figure 7 It is an internal cross-sectional view of the desuperheater of Example 3 of the present utility model.
[0023] In the accompanying drawings, there are a sleeve 1, a water inlet pipe 2, a water outlet pipe 3, a first annular pipe 4, a second annular pipe 5, an atomizing nozzle 6, a cooling pipe 7, a reinforcement ring 8, a fixing hole 81, an air outlet 82, and a flange 9. DETAILED DESCRIPTION
[0024] Example 1
[0025] like Figure 1-Figure 7 As shown, a desuperheater for a steam boiler in this embodiment 1 comprises a sleeve 1 in which a steam inner cavity is arranged and flanges 9 arranged at both ends of the sleeve 1. The left and right ends of the sleeve 1 are respectively the steam inlet end and the steam outlet end of the desuperheater. An inlet pipe 2 and an outlet pipe 3 are respectively fixedly arranged on the outer walls of the steam inlet end and the steam outlet end of the sleeve 1, which are respectively used to connect to a cooling water pipeline and discharge cooling water. A first annular pipe 4 and a second annular pipe 5 are arranged in the inner cavity of the sleeve 1. The first annular pipe 4 and the second annular pipe 5 are arranged in an annular manner along the circumference of the sleeve 1 and are respectively arranged at the ends of the sleeve 1. At the steam inlet end and the steam outlet end, the outer circumferential end faces of the first annular tube 4 and the second annular tube 5 are welded and fixed to the inner wall of the casing 1, the water inlet pipe 2 and the water outlet pipe 3 are respectively connected to the first annular tube 4 and the second annular tube 5, a plurality of atomizing nozzles 6 are fixedly arranged on the inner circumferential end face of the first annular tube 4, and the plurality of atomizing nozzles 6 are arranged at intervals along the circumference of the first annular tube 4, a plurality of cooling tubes 7 are horizontally arranged between the first annular tube 4 and the second annular tube 5, and the cooling tube 7 is arranged to extend along the axial direction of the casing 1, and its two ends are respectively connected to the first annular tube 4 and the second annular tube 5.
[0026] Specifically, Figure 6 As shown in 4a, the first annular tube 4 in this embodiment 1 is a rectangular or square tubular structure, and the number of the plurality of atomizing nozzles 6 is 4 to 6. It should be noted that the cooling water inlet flow rate of the water inlet pipe 2 is greater than the water outlet flow rate of the first annular tube 4, so that the atomizing nozzle 6 can spray cooling water when in use.
[0027] The utility model connects the casing 1 with the boiler pipe through the flange 9, and the water inlet pipe 2 and the water outlet pipe 3 are respectively connected to the cooling water supply pipe and the drainage pipe. The superheated steam enters from the steam inlet end of the desuperheater, and part of the cooling water is sprayed out by the atomizing nozzle 6 through the first annular pipe 4, and the superheated steam is first cooled once, while part of the cooling water enters the cooling pipe 7 through the first annular pipe 4. The pipe wall of the cooling pipe 7 absorbs the heat of the superheated steam, thereby cooling the superheated steam twice, so that the superheated steam reaches the required value. The utility model has a simple structure, plays a role in cooling the superheated steam multiple times, and adopts a water spray and a surface cooling structure at the same time, avoiding the disadvantages of a single cooling structure and improving the cooling efficiency.
[0028] Example 2
[0029] Based on Example 1, the structure of the first annular tube 4 in a steam boiler desuperheater of Example 2 is different from that of Example 1, and other identical structures are not described in detail. Figure 6 As shown in Figure 4b, the axial cross section of the first annular tube 4 is a trapezoidal structure, so that the diameter of the airflow column becomes smaller when the airflow passes through the first annular tube 4, and a plurality of atomizing nozzles 6 are fixedly arranged on the end surface parallel to the axial direction. Through this structure, the superheated steam can be guided to flow when entering the desuperheater, so that the diameter of the airflow column becomes smaller, the effective area of the atomizing nozzle spraying is reduced, the desuperheating efficiency is improved, and the airflow column diameter is too large to prevent part of the superheated steam from contacting the cooling water.
[0030] Example 3
[0031] Based on Example 1, the structure of the first annular tube 4 in a steam boiler desuperheater of Example 3 is different from that of Example 1 and Example 2, and other identical structures are not described in detail. Figure 6 4c and Figure 7 As shown, the axial cross section of the first annular tube 4 is a pentagonal structure, and its inner peripheral end face is a V-shaped inclined surface structure, and a plurality of atomizing nozzles 6 are fixedly arranged on the inclined surface close to the cooling tube 7. Through this structure, not only can the steam flow direction be guided, but also the spray direction of the atomizing nozzle is inclined along the flow direction of the airflow, reducing the spray resistance, avoiding the atomizing nozzle from being directly impacted by the superheated steam and thus damaged, further improving the cooling effect of the water spray cooling, and increasing the service life of the desuperheater.
[0032] Based on the above-mentioned embodiment 1, embodiment 2 or this embodiment 3, as a preferred example, Figure 4 and Figure 5As shown, at least one reinforcement ring 8 is provided between the first annular tube 4 and the second annular tube 5. The reinforcement ring 8 is arranged in an annular manner along the circumference of the casing 1, and its outer peripheral end surface is fixedly connected to the inner wall of the casing 1; the reinforcement ring 8 is provided with a plurality of fixing holes 81 and a plurality of air outlet holes 82. The plurality of fixing holes 81 are used to match the plurality of cooling tubes 7 to pass through, and the plurality of air outlet holes 82 are to prevent the reinforcement ring 8 from blocking the airflow. By providing the reinforcement ring, the stability of the cooling tube can be improved, and the cooling tube can be prevented from bending or contacting each other due to the action of high-temperature steam when it is long, thereby affecting its cooling area.
[0033] It should be pointed out that the examples of the above-mentioned embodiments can be preferably combined with one or more of them according to actual needs, and multiple examples use a set of drawings to illustrate the combined technical features, which will not be described one by one here.
[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0036] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A desuperheater for a steam boiler, comprising a casing (1) for arranging a steam cavity, a water inlet pipe (2) and a water outlet pipe (3) being fixedly arranged on the outer side walls of the steam inlet end and the steam outlet end of the casing (1), characterized in that: A first annular tube (4) and a second annular tube (5) are arranged in an annular manner along the circumference of the casing (1) and are respectively arranged at the steam inlet end and the steam outlet end of the casing (1). The outer peripheral end surfaces of the first annular tube (4) and the second annular tube (5) are fixedly connected to the inner wall of the casing (1). The water inlet pipe (2) and the water outlet pipe (3) are respectively connected to the first annular tube (4) and the second annular tube (5). A plurality of atomizing nozzles (6) are fixedly arranged on the inner peripheral end surface of the first annular tube (4). The plurality of atomizing nozzles (6) are arranged at intervals along the circumference of the first annular tube (4). A plurality of cooling tubes (7) are arranged between the first annular tube (4) and the second annular tube (5). The cooling tube (7) is arranged to extend in the axial direction of the casing (1) and its two ends are respectively connected to the first annular tube (4) and the second annular tube (5).
2. A desuperheater for a steam boiler according to claim 1, characterized in that: The first annular tube (4) is in a rectangular or square tubular structure.
3. A desuperheater for a steam boiler according to claim 1, characterized in that: The axial cross section of the first annular tube (4) is a trapezoidal structure, so that the diameter of the airflow column becomes smaller when the airflow passes through the first annular tube (4), and the plurality of atomizing nozzles (6) are fixedly arranged on an end surface parallel to the axial direction.
4. A desuperheater for a steam boiler according to claim 1, characterized in that: The axial cross section of the first annular tube (4) is a pentagonal structure, and its inner peripheral end face is a V-shaped inclined surface structure. The plurality of atomizing nozzles (6) are fixedly arranged on the inclined surface of the inner peripheral end face of the first annular tube (4) close to the cooling tube (7) to protect the atomizing nozzles (6) from being directly impacted by airflow.
5. A desuperheater for a steam boiler according to any one of claims 2 to 4, characterized in that: At least one reinforcement ring (8) is provided between the first annular tube (4) and the second annular tube (5); the reinforcement ring (8) is arranged in an annular shape along the circumference of the sleeve (1), and its outer peripheral end surface is fixedly connected to the inner wall of the sleeve (1); the reinforcement ring (8) is provided with a plurality of fixing holes (81), and the plurality of fixing holes (81) are used to cooperate with a plurality of cooling tubes (7) to pass through.
6. A desuperheater for a steam boiler according to claim 5, characterized in that: The reinforcement ring (8) is also provided with a plurality of air outlet holes (82) to prevent the reinforcement ring (8) from blocking the passage of airflow.
7. A desuperheater for a steam boiler according to claim 6, characterized in that: Both ends of the sleeve (1) are provided with flanges (9) for connecting with boiler pipes.
8. A desuperheater for a steam boiler according to claim 7, characterized in that: The number of the plurality of atomizing nozzles (6) is 4 to 6, and they are all capable of spraying cooling water when in use.