Cooling water adding and preheating device of boiler water supply system

Abstract

The utility model belongs to the technical field of boiler cooling water adding equipment, and discloses a cooling water adding and preheating device of a boiler water supply system. According to the cooling water adding and preheating device, two movable frames are installed on an installation support through linear rails, two oil cylinders are used for driving two preheaters on the movable frames to be close to a boiler, the preheaters conduct heat exchange and heating on added cooling water through heat radiation of a boiler body, and the preheaters are designed to be hollow semicircular cylinder bodies; and a water injection pipeline and a boiler water injection port are connected through a metal hose. Safety accidents such as thermal stress, explosion or thermal shock of a thermal contactor in the boiler caused by too low temperature of cooling water can be avoided, safe operation of the boiler is guaranteed, and the service life of the boiler is further prolonged. Meanwhile, heat radiation of the boiler body can be utilized, and waste caused by natural dissipation of heat of the boiler is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler cooling water adding equipment, in particular to a cooling water adding preheating device for a boiler water supply system. Background Art

[0002] As an energy conversion device, the boiler mainly converts the stored chemical energy or electrical energy into thermal energy through fuel combustion or electrical energy, and then generates steam, high-temperature water or organic heat carrier to meet various process or heating needs. During the operation of the boiler, the water supply system is responsible for adding cooling water to the boiler, which plays a role in regulating and controlling the operating temperature of the boiler to ensure that the boiler operates in a safe and efficient state. Therefore, the design and optimization of the water supply system, especially the cooling water addition mechanism, is of great significance to improving the performance of the boiler and extending its service life.

[0003] Prior art, Chinese patent application number CN202022053055.2 provides a cooling water adding mechanism for a boiler feed water system, which effectively saves water resources through a series of equipment such as steam turbines, condensate boxes, circulating pumps, etc., and treats the newly added supplementary water to ensure the quality of circulating water. Although this technology has greatly improved the operating efficiency and safety of the boiler, the boiler cooling water adding mechanism only adds the supplementary cooling water directly to the thermal contactor inside the boiler. In certain specific environments, such as winter in the north, there are still potential safety hazards. Because the temperature in the north is low in winter, if cooling water is directly added to the boiler, the temperature of the thermal contactor inside the boiler may fluctuate violently, thereby generating thermal stress and damaging the metal parts of the thermal contactor of the boiler. This thermal shock may not only shorten the service life of the boiler, but may also cause more serious safety accidents, such as explosions or thermal shocks. Therefore, this situation not only affects the operating life of the boiler, but also causes certain economic losses.

[0004] Therefore, how to ensure the effective addition of cooling water while avoiding the thermal stress on the thermal contactor inside the boiler has become a major challenge in the current boiler technology field. In this regard, developing a new cooling water addition mechanism for the boiler feed water system that can operate stably and safely under different environmental conditions has become an urgent problem to be solved in the industry. Utility Model Content

[0005] Aiming at the problems existing in the existing cooling water adding mechanism in the background technology during the process of adding cooling water in winter, the utility model provides a cooling water adding preheating device for a boiler water supply system.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cooling water adding and preheating device for a boiler water supply system, comprising a mounting bracket, two linear tracks are arranged on the inner side of the mounting bracket, two movable frames are slidably arranged on the two linear tracks, base vertical plates are respectively fixed on both sides of the mounting bracket, and a preheater is arranged on each movable frame, the preheater is a hollow semi-cylindrical main body, and an inlet interface and a water outlet interface are respectively connected and arranged on the two end surfaces of the hollow semi-cylindrical main body, and the two interfaces are arranged in an upper and lower staggered manner, the water inlet interfaces of the two preheaters are connected to the water injection pipeline through a metal hose, and the water outlet interfaces of the two preheaters are connected to the water injection port of the boiler through a metal hose, and an oil cylinder is arranged between each movable frame and the base vertical plate, and the two oil cylinders drive the two movable frames to move toward each other when adding cooling water, so that the two preheaters are wrapped on the outer wall of the boiler, so as to realize the preheating of the added cooling water by contact heat exchange.

[0007] As a further explanation and limitation of the above technical solution, the mounting bracket includes two longitudinal beams and two transverse beams, the two base uprights and the two transverse beams are respectively fixed between the two longitudinal beams, at least two rib plates are fixed between each base upright and the transverse beam, and the two linear rails are respectively connected to the two longitudinal beams.

[0008] As a further supplement to the above technical solution, side brackets are respectively arranged on the two longitudinal beams, and the two side brackets together serve as an auxiliary positioning mechanism, and both are composed of two columns, two diagonal columns and a connecting column. The two columns are respectively fixed on the longitudinal beams, and the connecting column is fixed between the columns. The two diagonal columns are distributed on the outsides of the two columns, and each diagonal column is obliquely fixedly connected between the column and the longitudinal beam. The two columns and the connecting column form three-point contact with the outer wall of the boiler respectively, so that the two preheaters are tightly wrapped on the outer wall of the boiler when adding cooling water, thereby ensuring the contact heat conduction effect.

[0009] As a further supplement to the above technical solution, a plurality of connecting beams are arranged between the two linear rails to ensure a constant spacing between the two linear rails and avoid affecting the movement of the moving frame.

[0010] As a further explanation and limitation of the above technical solution, the mobile frame includes a base frame and four rollers are respectively arranged at the four corners of its bottom, the hollow semi-cylindrical body is fixed to the base frame through a support beam and two inclined beams, a connecting vertical plate is fixedly connected to the base frame, a first articulated seat is arranged on the base vertical plate, a second articulated seat is arranged on the connecting vertical plate, and the cylinder is hinged between the first articulated seat and the second articulated seat.

[0011] As a further supplement to the above technical solution, two limit supports are arranged on each of the base vertical plates, and the two limit supports are symmetrically distributed on both sides of the first hinged seat. An anti-collision buffer mechanism is arranged on each limit support, and the two anti-collision buffer mechanisms are used to absorb the impact energy generated by inertia during the recovery process of the mobile frame to protect the cylinder from damage due to impact.

[0012] As a further explanation and limitation of the above technical solution, the anti-collision buffer mechanism includes a buffer spring and a connecting rod. The connecting rod is passed through the limit support and is arranged on the base vertical plate, and a resistance baffle and a limit ring block are respectively fixed at both ends of the connecting rod. The buffer spring is sleeved on the connecting rod and is located between the resistance baffle and the base vertical plate.

[0013] As a further supplement to the above technical solution, an anti-collision beam is fixedly connected to the base frame, and the anti-collision beam is used to prevent the base frame from being deformed due to frequent collision and contact of the abutment baffle.

[0014] As a further supplement to the above technical solution, a plurality of heat sinks are arranged on the outer side of the hollow semi-cylindrical body, and the heat sinks are used to prevent the accumulation of thermal stress in the hollow semi-cylindrical body during the preheating of cooling water and also play a role in reinforcing the structure.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. The utility model realizes the flexible movement of two preheaters through the design of linear rails and mobile racks. When adding cooling water, the preheater is tightly wrapped on the outer wall of the boiler, and the heat radiation of the boiler is used for heat exchange heating, thereby avoiding the safety accident of the thermal contactor caused by the low temperature of the cooling water and effectively extending the service life of the boiler. Therefore, the cooling water adding preheating device can also effectively utilize the natural dissipation of boiler heat, avoid the waste of boiler heat, improve the operating efficiency and safety factor of the boiler, and enable the boiler to operate stably and safely under different environmental conditions.

[0017] 2. The preheater in this utility model adopts a separate design, which is convenient for the modification of the existing boiler system. When no cooling water is added, the preheater can be driven away from the boiler by the oil cylinder, reducing the impact of heat radiation on the preheater and further extending its service life. This design is suitable for both newly installed boiler systems and the modification of existing boiler systems.

[0018] 3. The utility model uses an auxiliary positioning mechanism on the mounting bracket, wherein the auxiliary positioning mechanism uses two upright columns and a connecting column to form a three-point contact with the outer wall of the boiler, which helps to ensure the accuracy of the position of the cooling water adding and preheating device during the installation process, and ensures that the preheater is tightly wrapped on the outer wall of the boiler when preheating and adding cooling water. Therefore, the auxiliary positioning mechanism ensures the contact heat conduction effect between the preheater and the boiler, so that the cooling water can be heated more quickly and evenly.

[0019] 4. The anti-collision buffer mechanism design on the base vertical plate of the utility model absorbs the impact energy generated by the inertia of the mobile frame during the recovery process through the buffer spring and the connecting rod, effectively protecting the oil cylinder from impact damage. At the same time, the anti-collision beam on the base frame can prevent the base frame from being deformed due to frequent collisions with the baffle, further enhancing the safety and stability of the equipment.

[0020] 5. The utility model provides a plurality of heat sinks on the outer side of the hollow semi-cylindrical body of the preheater, which can not only effectively prevent the accumulation of thermal stress during the preheating process and cause the structural deformation of the preheater, thereby improving the service life; at the same time, the heat sinks also play a role in reinforcing the structure of the preheater, thereby enhancing the overall stability and durability of the preheater. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a cooling water preheating device in the utility model;

[0022] Figure 2 It is a structural diagram of the mounting bracket in the utility model;

[0023] Figure 3 It is an assembly diagram of the mobile rack and the preheater in the utility model;

[0024] Figure 4 It is a cross-sectional structural diagram of the preheater in the utility model;

[0025] Figure 5 It is a structural diagram of the anti-collision buffer mechanism in the utility model;

[0026] Figure 6 This is a reference diagram for the installation of a cooling water preheating device in the utility model.

[0027] In the figure: the mounting bracket is 1, the linear track is 2, the moving frame is 3, the base plate is 4, the oil cylinder is 5, the preheater is 6, the anti-collision buffer mechanism is 7, the connecting beam is 8, the first articulated seat is 9, the second articulated seat is 10, the anti-collision beam is 11, and the heat sink is 12.

[0028] The mounting bracket includes: a longitudinal beam 101 , a transverse beam 102 , a stiffener 103 , a limit support 104 , a column 105 , a diagonal column 106 , and a connecting column 107 .

[0029] The mobile frame includes: a base frame 301 , a roller 302 , a support beam 303 , a cable-stayed beam 304 , and a connecting vertical plate 305 .

[0030] The preheater includes: a hollow semi-cylindrical main body 601, a water inlet interface 602, and a water outlet interface 603.

[0031] The anti-collision buffer mechanism includes: a buffer spring 701 and a connecting rod 702 , a contact baffle 703 , and a limiting ring block 704 . DETAILED DESCRIPTION

[0032] In order to further illustrate the technical solution of the utility model, the following Figures 1 to 6 ,According to the design scheme and the requirements for later transformation implementation, we further illustrate the utility model through three embodiments. Embodiment 1

[0033] As attached Figures 1 to 5 As shown, a cooling water adding preheating device for a boiler feed water system includes a mounting bracket 1, wherein the mounting bracket 1 includes two longitudinal beams 101 and two transverse beams 102, the two base uprights 4 and the two transverse beams 102 are respectively fixed between the two longitudinal beams 101, at least two rib plates 103 are fixed between each base upright 4 and the transverse beam 102, two linear rails 2 are respectively connected to the two longitudinal beams 101, and a plurality of connecting beams 8 are arranged between the two linear rails 2 to ensure that the spacing between the two linear rails 2 is constant to avoid affecting the movement of the moving frame 3. Two moving frames 3 are slidably arranged on the two linear rails 2, and the moving frames 3 include a base frame 301 and four rollers 302 respectively arranged at the four corners of the bottom thereof, a connecting vertical plate 305 is fixedly connected to the base frame 301, a first hinge seat 9 is arranged on the base vertical plate 4, and a second hinge seat 10 is arranged on the connecting vertical plate 305, the oil cylinder 5 is hinged between the first hinge seat 9 and the second hinge seat 10, and the preheater 6 is fixed on the base frame 301 through the support beam 303 and the two inclined beams 304. On the base frame 301, the preheater 6 is a hollow semi-cylindrical main body 601, and a water inlet interface 602 and a water outlet interface 603 are respectively connected and arranged at the two end surfaces of the hollow semi-cylindrical main body 601, and the two interfaces are arranged in an upper and lower staggered manner. An oil cylinder 5 is arranged between each movable frame 3 and the base vertical plate 4. When adding cooling water, the two oil cylinders 5 drive the two movable frames 3 to move toward each other, so that the two preheaters 6 are wrapped on the outer wall of the boiler, thereby realizing preheating by adding cooling water in a contact heat exchange manner.

[0034] As a preferred implementation mode of this embodiment: a plurality of heat sinks 12 are provided on the outer side of the hollow semi-cylindrical main body 601, and the heat sinks 12 are used to prevent the accumulation of thermal stress in the hollow semi-cylindrical main body 601 during the preheating of cooling water and also play a role in reinforcing the structure. Embodiment 2

[0035] In order to ensure that the two preheaters can be closely attached to the outer wall of the boiler when adding cooling water, to ensure the heat conduction effect between them. Figure 2 As shown, side brackets are respectively arranged on the two longitudinal beams 101, and the two side brackets serve together as an auxiliary positioning mechanism, and both are composed of two columns 105, two inclined columns 106 and a connecting column 107. The two columns 105 are respectively fixed on the longitudinal beams 101, and the connecting column 107 is fixed between the columns 105. The two inclined columns 106 are distributed on the outside of the two columns 105, and each inclined column 106 is obliquely fixedly connected between the column 105 and the longitudinal beam 101. The two columns 105 and the connecting column 107 form three-point contact with the outer wall of the boiler respectively, so that the two preheaters 6 are tightly wrapped on the outer wall of the boiler when adding cooling water, thereby ensuring the contact heat conduction effect. Embodiment 3

[0036] In order to improve the stability and safety of the cooling water preheating device, the potential damage risk caused by impact during the mobile rack recovery process is reduced. Figure 3 and 5 As shown, we set two limit supports 104 on each base vertical plate 4, and the two limit supports 104 are symmetrically distributed on both sides of the first hinge seat 9. An anti-collision buffer mechanism 7 is set on each limit support 104, and the anti-collision buffer mechanism 7 includes a buffer spring 701 and a connecting rod 702. The connecting rod 702 is inserted on the base vertical plate 4 through the limit support 104, and a contact baffle 703 and a limit ring block 704 are fixed at both ends thereof. The buffer spring 701 is sleeved on the connecting rod 702 and is located between the contact baffle 703 and the base vertical plate 4. The two anti-collision buffer mechanisms 7 use the buffer spring 701 and the connecting rod 702 to absorb the impact energy generated by the inertia of the mobile frame 3 during the recovery process, so as to protect the oil cylinder 5 from damage due to impact.

[0037] As a preferred implementation mode of this embodiment: an anti-collision beam 11 is fixedly connected to the base frame 301 , and the anti-collision beam 11 is used to prevent the abutment baffle 703 from frequently impacting and contacting and causing deformation of the base frame 301 .

[0038] Its working principle: as shown in the attached Figure 4 and 6As shown, during the installation process, we select a section of the horizontal boiler without auxiliary pipelines and interfaces, and use the auxiliary positioning mechanism to make the two columns 105 and the connecting column 107 form a three-point contact with the outer wall of the boiler respectively, to ensure that the installation position of the mounting bracket will not be misplaced or offset, and also to ensure that the two preheaters 6 can be perfectly fitted with the outer wall of the boiler in the later stage. According to the above requirements, the cooling water adding and preheating device is installed under the horizontal boiler, and then the water inlet interface 602 of the two preheaters 6 is connected to the water injection pipeline through a metal hose, and the water outlet interface 603 of the two preheaters 6 is connected to the water injection port of the boiler through a metal hose. When cooling water needs to be added, the two preheaters 6 are driven by two oil cylinders 5 to fit on the outer wall of the boiler to form a wrapping contact. Finally, start the water injection pump and open the valve on the boiler water injection port to preheat and add the boiler cooling water.

[0039] The above shows and describes the main features and advantages of the utility model. For those skilled in the art, it is obvious that the specific implementation of the utility model is not limited to the details of the above exemplary embodiments, and the creative ideas and design ideas of the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model, which should be equivalent to the protection scope disclosed in the technical solution of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cooling water preheating device for a boiler feed water system, comprising a mounting bracket (1), characterized in that: Two linear rails (2) are arranged on the inner side of the mounting bracket (1), two moving racks (3) are slidably arranged on the two linear rails (2), base vertical plates (4) are fixed on both sides of the mounting bracket (1), and a preheater (6) is arranged on each moving rack (3), the preheater (6) is a hollow semi-cylindrical body (601), and a water inlet interface (602) and a water outlet interface (603) are respectively connected and arranged on both end surfaces of the hollow semi-cylindrical body (601), and the two interfaces are arranged in an up-down staggered manner. The water inlet interfaces (602) of the two preheaters (6) are connected to the water injection pipeline via a metal hose, and the water outlet interfaces (603) of the two preheaters (6) are connected to the water injection port of the boiler via a metal hose. An oil cylinder (5) is provided between each movable frame (3) and the base plate (4). When adding cooling water, the two oil cylinders (5) drive the two movable frames (3) to move towards each other, so that the two preheaters (6) are wrapped around the outer wall of the boiler, thereby realizing preheating by adding cooling water in a contact heat exchange manner.

2. The cooling water adding preheating device of the boiler feed water system according to claim 1, characterized in that: The mounting bracket (1) comprises two longitudinal beams (101) and two transverse beams (102); the two base uprights (4) and the two transverse beams (102) are respectively fixed between the two longitudinal beams (101); at least two rib plates (103) are fixed between each base upright (4) and the transverse beam (102); and the two linear rails (2) are respectively connected to the two longitudinal beams (101).

3. The cooling water adding preheating device of the boiler feed water system according to claim 2, characterized in that: Side brackets are respectively arranged on the two longitudinal beams (101), and the two side brackets together serve as auxiliary positioning mechanisms, and both are composed of two columns (105), two inclined columns (106) and a connecting column (107). The two columns (105) are respectively fixed on the longitudinal beams (101), and the connecting column (107) is fixed between the columns (105). The two inclined columns (106) are distributed outside the two columns (105), and each inclined column (106) is obliquely fixedly connected between the column (105) and the longitudinal beam (101). The two columns (105) and the connecting column (107) respectively form three-point contact with the outer wall of the boiler, so that the two preheaters (6) are tightly wrapped on the outer wall of the boiler when adding cooling water, thereby ensuring the contact heat conduction effect.

4. A cooling water adding preheating device for a boiler feed water system according to any one of claims 1 to 3, characterized in that: A plurality of connecting beams (8) are arranged between the two linear rails (2) to ensure that the distance between the two linear rails (2) is constant, thereby preventing the movement of the moving frame (3) from being affected.

5. The cooling water adding preheating device of the boiler feed water system according to claim 4, characterized in that: The mobile frame (3) comprises a base frame (301) and four rollers (302) respectively arranged at the four corners of the bottom thereof; the hollow semi-cylindrical body (601) is fixed to the base frame (301) via a support beam (303) and two inclined beams (304); a connecting vertical plate (305) is fixedly connected to the base frame (301); a first hinge seat (9) is arranged on the base vertical plate (4); a second hinge seat (10) is arranged on the connecting vertical plate (305); and the oil cylinder (5) is hinged between the first hinge seat (9) and the second hinge seat (10).

6. The cooling water adding preheating device of the boiler feed water system according to claim 5, characterized in that: Two limit supports (104) are arranged on each of the base uprights (4), and the two limit supports (104) are symmetrically distributed on both sides of the first hinged seat (9). An anti-collision buffer mechanism (7) is arranged on each of the limit supports (104), and the two anti-collision buffer mechanisms (7) are used to absorb the impact energy generated by the inertia of the mobile frame (3) during the recovery process, thereby protecting the oil cylinder (5) from damage due to impact.

7. The cooling water adding preheating device of the boiler feed water system according to claim 6, characterized in that: The anti-collision buffer mechanism (7) comprises a buffer spring (701) and a connecting rod (702); the connecting rod (702) is inserted into the base vertical plate (4) through the limiting support (104), and a contact baffle (703) and a limiting ring block (704) are respectively fixed at both ends of the connecting rod; the buffer spring (701) is sleeved on the connecting rod (702) and is located between the contact baffle (703) and the base vertical plate (4).

8. The cooling water adding preheating device of the boiler feed water system according to claim 7, characterized in that: An anti-collision beam (11) is fixedly connected to the base frame (301), and the anti-collision beam (11) is used to prevent the base frame (301) from being deformed due to frequent collision and contact of the abutting baffle (703).

9. A cooling water adding preheating device for a boiler feed water system according to any one of claims 1 to 3 or any one of claims 5 to 8, characterized in that: A plurality of heat sinks (12) are arranged on the outer side of the hollow semi-cylindrical body (601), and the heat sinks (12) are used to prevent thermal stress accumulation in the hollow semi-cylindrical body (601) during the preheating of cooling water and also play a role in reinforcing the structure.

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