Box-type skid-mounted once-through boiler

Abstract

The utility model relates to a boiler technical field, concretely is a kind of box type pry installation tubular boiler, including shell, shell is cuboid box type structure, the inside installation of shell has boiler host, the side of boiler host is connected with energy saver, the side of energy saver is connected with inlet pipe, inlet pipe is imported boiler host after passing energy saver, the flue gas passage of boiler host is communicated with energy saver inside.The boiler realizes efficient energy saving by two key designs.The first, the flue gas passage of boiler host is directly communicated with energy saver inside, high-temperature flue gas can fully flow through energy saver in the process of discharging, heat is transferred to medium in energy saver, avoid the heat waste caused by the unreasonable design of flue gas passage of traditional boiler;Second, inlet pipe and water supply pipe are connected into boiler host again after passing energy saver, gas and water have been preheated by energy saver to absorb flue gas heat before entering host, substantially reduce the energy consumption required for boiler host heating.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a box-type skid-mounted once-through boiler. Background Technology

[0002] In many fields such as industrial production, commercial heating, and residential heating, boilers, as core heat energy supply equipment, directly affect production efficiency, energy consumption, and safety. With the increasing demands for energy conservation, emission reduction, space optimization, and equipment integration in contemporary society, traditional boilers are gradually revealing a series of problems that urgently need to be addressed in practical applications.

[0003] First, the overall structure of traditional boilers is relatively dispersed. The boiler main unit, energy-saving devices, water treatment equipment, steam distribution components, etc. often need to be installed in separate areas. This not only results in a large footprint, especially in industrial plants or urban commercial areas where space resources are scarce, making it difficult to meet the requirements of compact layout, but also increases the complexity of pipeline connections between components, prolongs the installation period, and increases the initial construction cost.

[0004] Secondly, traditional boilers have significant shortcomings in energy efficiency. Although most traditional boilers are equipped with energy-saving components, the poor design of the flue gas passage between the boiler main unit and the energy-saving device prevents the heat from the flue gas from being fully transferred to the water or air intake system. This results in a large amount of high-temperature flue gas being directly emitted, causing energy waste. This is inconsistent with the current national advocacy of low-carbon and environmentally friendly development and also keeps the long-term operating costs for users high.

[0005] Furthermore, traditional boilers lack ease of operation and management. Traditional boiler systems lack integrated operation and monitoring spaces, requiring operators to frequently move between different equipment areas. This not only increases workload but can also lead to untimely information transmission between devices, affecting the precise control of operating parameters and posing certain safety hazards. Simultaneously, some boilers have poor integration between their water treatment equipment and the main unit, resulting in unstable softened water supply, which easily leads to scale buildup inside the boiler, shortening equipment lifespan and increasing maintenance costs.

[0006] In addition, in the steam distribution stage, traditional boilers usually adopt a simple pipeline diversion method, which makes it difficult to achieve precise steam supply control for different heat-using equipment. This can easily lead to problems such as steam pressure fluctuations and uneven steam supply, affecting the normal operation of downstream heat-using equipment and reducing the stability of the overall production or heating system. Utility Model Content

[0007] The purpose of this utility model is to provide a box-type skid-mounted once-through boiler to solve the problem mentioned in the background art that although most traditional boilers are equipped with energy-saving components, the flue gas heat cannot be fully transferred to the water or air intake system due to the unreasonable design of the flue gas passage between the boiler host and the energy-saving device, resulting in the direct emission of a large amount of high-temperature flue gas, causing energy waste, which is inconsistent with the current national advocacy of low-carbon and environmentally friendly development concept, and also makes the long-term operating costs of users remain high.

[0008] To achieve the above objectives, this utility model provides a box-type skid-mounted once-through boiler, including an outer shell, which is a rectangular box structure. The boiler host is installed inside the outer shell. An economizer is connected to one side of the boiler host, and an air inlet pipe is connected to one side of the economizer. The air inlet pipe passes through the economizer and enters the boiler host. The flue gas passage of the boiler host is connected to the inside of the economizer. A flue gas outlet is provided at the top of the economizer. The top of the boiler host is connected to the steam distribution cylinder through a steam pipe.

[0009] This design constructs the boiler's main structure through a "rectangular box-shaped shell + core component integration + flue gas-medium heat exchange" approach. First, the rectangular box-shaped shell serves as the integration carrier, consolidating core functional components such as the boiler main unit, economizer, and steam distribution cylinder into a single enclosed space, achieving a compact equipment structure. Second, the design incorporates an intake pipe that passes through the economizer before entering the boiler main unit, while simultaneously connecting the boiler main unit's flue gas passage with the economizer's interior, forming a "flue gas heat dissipation - medium preheating" heat exchange loop. The high-temperature flue gas generated by the boiler main unit enters the economizer, transferring heat to the intake gas flowing through it, thus preheating the intake gas before it enters the main unit. Finally, steam generated by the boiler main unit is transported to the steam distribution cylinder via steam pipes, enabling centralized steam distribution.

[0010] Preferably, the interior of the housing is equipped with a desk and an office chair.

[0011] This setup includes an office desk and chair, integrating the "equipment operation area" and the "operation monitoring area" into the same enclosure, forming a "nearby operation - real-time monitoring" working mode. Operators can monitor, record, and control boiler operating parameters at their desks without leaving the enclosure, and can also directly observe the operating status of internal components, achieving close adaptation between operation and equipment.

[0012] Preferably, the interior of the outer casing is provided with a soft water tank, which is connected to a water supply pipe. The water supply pipe passes through the energy-saving device and enters the boiler host. A drain pipe is connected to one side of the bottom of the soft water tank.

[0013] This feature incorporates a soft water tank inside the enclosure, creating a "soft water storage-preheating-supply" water treatment and supply system. The soft water tank stores treated soft water, preventing hard water from directly entering the boiler and causing scaling. A water supply pipe connects the soft water tank to the boiler and passes through an economizer, utilizing the waste heat from the high-temperature flue gas to preheat the soft water. This ensures a continuous and stable supply of preheated soft water to the boiler. Additionally, a drain pipe is installed on one side of the bottom of the soft water tank to periodically remove accumulated impurities, ensuring the quality of the softened water.

[0014] Preferably, a drain pipe is connected to one side of the bottom of the soft water tank.

[0015] This feature involves repeatedly installing a drain pipe on one side of the bottom of the soft water tank (echoing claim 3 and enhancing the drain function design). Gravity is used to concentrate the impurities (such as silt and suspended solids) deposited in the water tank at the bottom. By periodically opening the drain pipe valve, the impurities are discharged from the water tank, preventing them from accumulating in the water tank and clogging the water supply pipe or entering the boiler main unit, thus ensuring the smooth flow of softened water and the cleanliness of the water.

[0016] Preferably, one side of the energy saver is connected to a cold exhaust pipe, and one side of the boiler host is connected to a hot exhaust pipe.

[0017] This setup addresses the different heat dissipation needs of the economizer and the boiler main unit by designing separate cold exhaust pipes (connecting to the economizer) and hot exhaust pipes (connecting to the boiler main unit): the cold exhaust pipes are used to dissipate excess heat from the economizer, preventing it from overheating due to continuous heat input from flue gas, which could affect heat exchange efficiency or damage components; the hot exhaust pipes are used to dissipate additional heat generated during the operation of the boiler main unit (such as heat dissipation from the furnace outer wall and pipes), preventing local overheating of the main unit from causing safety hazards, thus forming a "zoned heat dissipation - temperature control" cooling system.

[0018] Preferably, a safety valve exhaust pipe is connected to one side of the top of the boiler main unit.

[0019] This device connects to the safety valve exhaust pipe on one side of the top of the boiler main unit, forming a "pressure over-limit - automatic pressure relief" safety protection mechanism: the safety valve is set with a rated pressure threshold. When the pressure inside the boiler main unit exceeds the threshold due to excessive steam generation, poor exhaust, or other reasons, the safety valve automatically opens and quickly discharges the excess steam through the exhaust pipe, reducing the internal pressure of the main unit to a safe range and preventing safety accidents such as explosions caused by excessive pressure.

[0020] Preferably, the top of the steam distribution cylinder is provided with a steam inlet and several gas supply outlets, the steam inlet is connected to a steam pipe, and the gas supply outlets are connected to external heat-using equipment.

[0021] This design employs a "single inlet - multiple outlets" structure for the steam distribution cylinder: a steam inlet is located at the top and connected to the steam pipe of the boiler main unit to centrally receive the steam generated by the main unit; at the same time, several steam outlets are provided, each outlet corresponding to one or a group of external heat-using devices. By adjusting the valves of each outlet, the steam supply and pressure of different heat-using devices can be independently controlled, forming a "centralized reception - decentralized control" steam distribution system.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This box-type skid-mounted once-through boiler uses a rectangular box-shaped shell as an integrated carrier, centrally installing the boiler main unit, economizer, steam distribution cylinder, soft water tank, and even office desks and chairs inside the shell, completely changing the traditional dispersed layout of various boiler components. On the one hand, the box structure significantly reduces the overall footprint of the equipment, making it particularly suitable for space-constrained scenarios such as industrial plants and urban commercial areas, easily meeting the requirements for compact layouts. On the other hand, each component has already completed pipeline connections and debugging before leaving the factory, requiring only simple positioning and fixing on-site for immediate use. This not only eliminates the complex on-site pipeline construction process of traditional boilers but also significantly shortens the installation period, substantially reducing upfront construction costs and labor input.

[0024] In terms of energy utilization, this boiler achieves high efficiency and energy saving through two key design features. First, the flue gas passage of the boiler main unit is directly connected to the inside of the economizer. During the exhaust process, the high-temperature flue gas can flow fully through the economizer, transferring heat to the medium inside (such as gas in the inlet pipe and water in the feedwater pipe), avoiding heat waste caused by unreasonable flue gas passage design in traditional boilers. Second, both the inlet pipe and the feedwater pipe pass through the economizer before entering the boiler main unit. The gas and water are preheated by absorbing heat from the flue gas before entering the main unit, significantly reducing the energy consumption required for heating the boiler main unit. This dual energy-saving design significantly improves the overall thermal efficiency of the boiler, not only reducing energy loss from high-temperature flue gas emissions, which aligns with the national low-carbon and environmentally friendly development concept, but also reducing fuel consumption costs for users during long-term operation, achieving a win-win situation for both economic and environmental benefits. Attached Figure Description

[0025] Figure 1 This is a side view of the structure of this utility model;

[0026] Figure 2 This is a top view of the structure of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the steam cylinder in this utility model;

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Outer casing; 11. Desk; 12. Office chair; 13. Soft water tank; 131. Drain pipe; 132. Water supply pipe; 2. Energy saver; 21. Air inlet pipe; 22. Smoke outlet; 23. Cold air vent pipe; 3. Boiler main unit; 31. Safety valve exhaust pipe; 32. Steam pipe; 33. Hot air vent pipe; 4. Steam distribution cylinder; 41. Steam inlet; 42. Gas supply outlet. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model provides a box-type skid-mounted once-through boiler, such as Figures 1-3 As shown, the boiler includes an outer shell 1, which is a rectangular box structure. The boiler host 3 is installed inside the outer shell 1. An economizer 2 is connected to one side of the boiler host 3. An air inlet pipe 21 is connected to one side of the economizer 2. The air inlet pipe 21 passes through the economizer 2 and enters the boiler host 3. The flue gas passage of the boiler host 3 is connected to the inside of the economizer 2. A flue gas outlet 22 is provided on the top of the economizer 2. The top of the boiler host 3 is connected to the steam distribution cylinder 4 through a steam pipe 32.

[0032] The main structure of the boiler is constructed through a design of "rectangular box-type shell 1 + core component integration + flue gas-medium heat exchange": First, the rectangular box-type shell 1 serves as the integration carrier, integrating core functional components such as the boiler host 3, economizer 2, and steam distribution cylinder 4 into the same enclosed space to achieve a compact equipment structure; Second, the design of the air inlet pipe 21 leads to the boiler host 3 after passing through the economizer 2, while simultaneously connecting the flue gas passage of the boiler host 3 with the interior of the economizer 2, forming a heat exchange loop of "flue gas heat dissipation - medium preheating"—the high-temperature flue gas generated by the operation of the boiler host 3 enters the economizer 2 and transfers heat to the air inlet flowing through the economizer 2, so that the air inlet is preheated before entering the host; Finally, the steam generated by the boiler host 3 is transported to the steam distribution cylinder 4 through the steam pipe 32, and the steam distribution cylinder 4 realizes the centralized distribution of steam.

[0033] The box-type integrated design of the outer casing 1 completely changes the traditional dispersed layout of boiler components, significantly reducing the overall footprint of the equipment and making it suitable for space-constrained environments such as industrial plants and urban commercial areas, meeting the requirements for compact installation. The heat exchange circuit between the flue gas of the boiler main unit 3 and the air intake through the inlet pipe 21 fully utilizes the waste heat of the high-temperature flue gas, reducing heat loss from the direct exhaust of flue gas from the top flue gas outlet 22 of the economizer 2, reducing the energy consumption required for the boiler main unit 3 to heat the intake air, improving overall thermal efficiency, and meeting low-carbon and environmental protection requirements. The integrated "air intake preheating through inlet pipe 21 - steam generation by boiler main unit 3 - steam distribution through steam distributor 4" process avoids the need for additional piping connections to various components in traditional boilers, simplifying the equipment structure and reducing on-site installation complexity.

[0034] In this embodiment, an office desk 11 and an office chair 12 are installed inside the outer casing 1.

[0035] This design avoids the need for operators to travel between dispersed equipment rooms, reducing workload and shortening response time for parameter adjustments to components such as the boiler main unit 3 and economizer 2, thus improving operational efficiency. Operators can monitor the operating status of the boiler main unit 3 and the piping connections of the economizer 2 in real time from their desks 11, promptly detecting abnormalities such as leaks in the intake pipe 21 or unusual noises from the boiler main unit 3, reducing the risk of malfunctions due to untimely monitoring. An independent operating space is created within the outer casing 1 using desks 11 and chairs 12, providing operators with a relatively comfortable and safe working environment, avoiding the impact of external factors such as wind, rain, and dust.

[0036] Specifically, the interior of the outer casing 1 is equipped with a soft water tank 13, which is connected to a water supply pipe 132. The water supply pipe 132 passes through the energy saver 2 and enters the boiler host 3. A drain pipe 131 is connected to one side of the bottom of the soft water tank 13.

[0037] Furthermore, a drain pipe 131 is connected to one side of the bottom of the soft water tank 13.

[0038] The softened water supplied by the soft water tank 13 prevents scale buildup inside the boiler host 3, reducing the corrosion and thermal resistance of the boiler host 3's heating surfaces, extending the boiler host 3's service life, and lowering maintenance costs such as descaling and replacement costs for boiler host 3 components. The preheating design of the water supply pipe 132, which passes through the economizer 2, forms a "dual waste heat utilization" system with the preheating of the air inlet pipe 21, further utilizing the waste heat from the flue gas inside the economizer 2 to reduce the energy consumption of the boiler host 3 in heating the softened water and improve overall energy efficiency. The storage function of the soft water tank 13 prevents the boiler host 3 from running out of water due to fluctuations in external water supply, while the drain pipe 131 ensures stable softened water quality and prevents impurities from entering the boiler host 3 through the water supply pipe 132 and affecting operational safety.

[0039] Furthermore, one side of the energy-saving device 2 is connected to a cold exhaust pipe 23, and one side of the boiler host 3 is connected to a hot exhaust pipe 33.

[0040] The cold exhaust pipe 23 maintains the economizer 2 within a suitable temperature range, preventing high temperatures from causing aging of the economizer 2's seals and failure of the air inlet pipe 21 interface. The hot exhaust pipe 33 controls the temperature of the boiler main unit 3, preventing overheating from causing deformation of the boiler main unit 3 material and abnormal connection of the steam pipe 32, thus extending the lifespan of core components. It prevents the economizer 2 from bursting due to high temperatures and the boiler main unit 3 from posing a fire hazard due to high temperatures. The dual heat dissipation of the cold exhaust pipe 23 and the hot exhaust pipe 33 provides temperature assurance for stable equipment operation. The cold exhaust pipe 23 prevents the economizer 2 from overheating, which could reduce the temperature difference between the flue gas and the air intake pipe 21 and the soft water in the water supply pipe 132, ensuring stable heat exchange performance of the economizer 2 and preventing a decrease in energy efficiency.

[0041] Furthermore, a safety valve exhaust pipe 31 is connected to one side of the top of the boiler host 3.

[0042] As a key safety device of the boiler main unit 3, the safety valve exhaust pipe 31 directly blocks the safety risks caused by excessive pressure. Compared with the single pressure monitoring of traditional boilers, it provides more proactive and reliable pressure relief protection for the boiler main unit 3. This prevents plastic deformation or damage to components such as the furnace and steam pipe 32 interfaces due to excessive internal pressure in the boiler main unit 3, reducing equipment failure and repair costs and ensuring the long-term stable operation of the boiler main unit 3. The design of the safety valve exhaust pipe 31 meets the mandatory standard requirements for the safe operation of boiler equipment, providing the necessary conditions for the boiler main unit 3 and even the entire equipment to pass safety acceptance and be used in compliance with regulations.

[0043] Furthermore, the top of the steam cylinder 4 is provided with a steam inlet 41 and several steam outlets 42. The steam inlet 41 is connected to the steam pipe 32, and the steam outlets 42 are connected to external heat-using equipment.

[0044] The "single inlet 41 - multiple outlets 42" design of the steam distributor 4 avoids the uneven steam supply problem caused by the simple pipe diversion of traditional boilers. It allows for the control of steam parameters by adjusting the valves at the gas outlets 42 according to the different needs of external heat-using equipment, meeting differentiated heating requirements. The steam distributor 4 buffers pressure fluctuations in the steam delivered by the boiler main unit 3's steam pipe 32, ensuring a stable steam supply to the heat-using equipment connected to each gas outlet 42. This prevents changes in the steam consumption of one piece of equipment from affecting the operation of other equipment, improving the overall stability of the heating system. The multiple gas outlets 42 design of the steam distributor 4 can flexibly connect to multiple different types of heat-using equipment, adapting to complex scenarios such as multi-line heating in industrial production and multi-area heating in commercial heating, thus expanding the boiler's applicability.

[0045] When using the box-type skid-mounted once-through boiler of this utility model, the soft water tank 13 first stores treated softened water in advance to prevent hard water from entering the boiler host 3 and causing scaling. Before starting, the impurities such as mud and suspended solids deposited in the tank are discharged through the drain pipe 131 at the bottom of the soft water tank 13 to ensure that the quality of the softened water meets the operating requirements and lays the foundation for subsequent water supply.

[0046] The operator performs a pre-treatment inspection of each component at the desk 11 inside the outer casing 1: confirming that there are no leaks in the connections of the air inlet pipe 21, water supply pipe 132, and steam pipe 32; checking that the valves of the cold exhaust pipe 23 of the economizer 2 and the hot exhaust pipe 33 of the boiler host 3 are in the normal open state; verifying whether the safety valve setting pressure of the safety valve exhaust pipe 31 meets the standard, and ensuring that the safety protection device is ready.

[0047] External gas / air enters the economizer 2 through the intake pipe 21. At this time, the boiler host 3 has been started and generates high-temperature flue gas. The high-temperature flue gas enters the economizer 2 through the flue gas passage of the boiler host 3 and exchanges heat with the intake gas flowing through the economizer 2. After absorbing the waste heat of the flue gas, the temperature of the intake gas rises and is then transported to the boiler host 3 through the intake pipe 21, reducing the energy consumption of the host for heating the intake gas.

[0048] The softened water in the soft water tank 13 also enters the energy-saving device 2 through the water supply pipe 132, and exchanges heat with the high-temperature flue gas again, forming a "dual waste heat utilization": the softened water absorbs the heat of the flue gas and its temperature rises, and then it is continuously and stably transported to the boiler host 3 through the water supply pipe 132, avoiding the thermal shock caused by the cold soft water directly entering the host, and further reducing the heating load of the host.

[0049] Inside the boiler main unit 3, the preheated intake air and preheated softened water are mixed and burned / heated to produce high-temperature and high-pressure steam. During the operation of the main unit, if the internal steam pressure exceeds the safety valve's set threshold, the safety valve will automatically open, and the excess steam will be quickly discharged through the safety valve exhaust pipe 31 to reduce the main unit pressure to a safe range and prevent accidents caused by excessive pressure.

[0050] The qualified steam generated by the boiler host 3 is transported to the steam inlet 41 of the steam distribution cylinder 4 through the steam pipe 32. After the steam distribution cylinder 4 stabilizes and buffers the steam, it distributes the steam to the corresponding heat-using equipment, such as industrial production lines and heating heat exchangers, by adjusting the valves of each gas outlet 42 according to the needs of different external heat-using equipment, thereby achieving "steam supply on demand" and avoiding the problem of uneven steam supply caused by traditional pipeline diversion.

[0051] During operation, if the temperature of the economizer 2 becomes too high due to continuous flue gas input, the cold exhaust pipe 23 will carry away the excess heat by introducing a cooling medium, such as cold air or cooling water, to maintain the economizer 2 within a suitable temperature range and prevent aging of the seals or damage to the pipes. If the boiler host 3 experiences local overheating, the hot exhaust pipe 33 will discharge the excess heat from the host to prevent deformation of the host material or abnormality of the steam pipe 32 interface, thus ensuring the stable operation of the core components.

[0052] After two heat exchanges, preheating the intake air and preheating the soft water, the heat of the high-temperature flue gas has been fully utilized, the temperature has been greatly reduced, and it is finally discharged from the flue gas outlet 22 at the top of the energy saver 2, reducing the energy waste of direct heat emission and meeting the requirements of low carbon and environmental protection.

[0053] Finally, it should be noted that the electronic components in the boiler host 3 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order of each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A box skid-mounted once-through boiler comprising a housing (1), characterized in that: The outer shell (1) is a rectangular box structure. The boiler host (3) is installed inside the outer shell (1). An energy saver (2) is connected to one side of the boiler host (3). An air inlet pipe (21) is connected to one side of the energy saver (2). The air inlet pipe (21) passes through the energy saver (2) and enters the boiler host (3). The flue gas passage of the boiler host (3) is connected to the inside of the energy saver (2). A flue gas outlet (22) is provided on the top of the energy saver (2). The top of the boiler host (3) is connected to the steam distribution cylinder (4) through a steam pipe (32).

2. The package on skids once-through boiler according to claim 1, characterized in that: The interior of the outer casing (1) is fitted with a desk (11) and an office chair (12).

3. The package pick-and-place once-through boiler of claim 1, wherein: The outer shell (1) is equipped with a soft water tank (13), which is connected to a water supply pipe (132). The water supply pipe (132) passes through the energy saver (2) and enters the boiler host (3). A drain pipe (131) is connected to one side of the bottom of the soft water tank (13).

4. The package pick-and-place once-through boiler of claim 1, wherein: The energy saver (2) is connected to a cold exhaust pipe (23) on one side, and the boiler host (3) is connected to a hot exhaust pipe (33) on one side.

5. The package pick-and-place once-through boiler of claim 1, wherein: A safety valve exhaust pipe (31) is connected to one side of the top of the boiler host (3).

6. The package pick-and-place once-through boiler of claim 1, wherein: The top of the steam cylinder (4) is provided with a steam inlet (41) and several gas outlets (42). The steam inlet (41) is connected to the steam pipe (32), and the gas outlets (42) are connected to external heat-using equipment.

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