Whitening device for steam production

Abstract

The utility model relates to the technical field of steam treatment, in particular to a white smoke eliminating device for producing steam, which comprises a reflux tank fixedly arranged on the ground, two cooling units symmetrically mounted at the top of the reflux tank, and a reheating unit mounted at the tops of the two cooling units. Two air inlets of the reheating unit are connected with corresponding air outlets of the cooling units, a steam supply pipe set is installed between the two cooling units, two outlet ends of the steam supply pipe set are connected into the cooling units respectively, the air inlet end of the steam supply pipe set is connected with an external steam pipeline, and the air outlet end of the steam supply pipe set is connected with an air outlet of the external steam pipeline. And a cooling liquid supply pipe group is arranged above the steam supply pipe group. According to the device, water vapor in high-temperature steam is condensed into liquid water through the cooling unit, so that white water vapor plumes formed in the atmosphere due to the fact that the water vapor is cooled when the steam is discharged are greatly reduced, the white elimination effect of the steam is achieved, the influence on the environment appearance is reduced, and visual pollution caused by the white water vapor plumes is avoided.

Description

Technical Field

[0001] This utility model relates to the field of steam treatment technology, and in particular to a steam de-whitening device for producing steam. Background Technology

[0002] Many industrial production processes, such as those in the power, chemical, steel, and paper industries, generate large amounts of steam. When this steam is released into the atmosphere, because its temperature is higher than the ambient temperature and it contains a certain amount of water vapor, the water vapor quickly condenses into small water droplets when it comes into contact with the cold ambient air, forming a white plume-like visual pollution, the so-called "white smoke" phenomenon.

[0003] This phenomenon not only affects the aesthetics of the surrounding environment but may also cause inconvenience to the lives of nearby residents. It is also regarded as a potential source of environmental pollution and is closely monitored by environmental protection departments.

[0004] Traditional steam de-whitening methods mainly fall into two categories: one is direct spray cooling, which involves spraying cold water into the steam to lower its temperature, causing the water vapor to condense into droplets which are then collected and discharged. For example, patent application CN201920311905.9 discloses a steel slag hot-quenching steam spray de-whitening device, which mainly includes a steam pipe, an outer cylinder, an inner cylinder, a spray pipe, an outer nozzle, an inner nozzle, and a double-layer sleeve structure. It can be seen that it relies on spray cooling to achieve primary and secondary de-whitening during steam treatment.

[0005] However, this method has several problems: First, the steam temperature is high, and the water quality of the spray water is required to be high when using water spraying, otherwise scaling will easily occur inside the equipment, affecting the normal operation of the equipment; Second, the amount of spray water used is large, resulting in a waste of water resources; Third, the large amount of spray water used also increases the cost of sewage treatment.

[0006] Therefore, developing a high-efficiency, environmentally friendly, and stable steam de-whitening device is of great practical significance. Utility Model Content

[0007] To solve one of the aforementioned technical problems, the present invention provides the following technical solution: a steam de-whitening device, comprising a return pool fixed on the ground, two cooling units symmetrically installed on the top of the return pool, a reheating unit installed on the top of the two cooling units, two air inlets of the reheating unit connected to the corresponding air outlets of the cooling units, a steam supply pipe assembly installed between the two cooling units, the two outlets of the steam supply pipe assembly respectively connected to the interior of the cooling units, the air inlet of the steam supply pipe assembly connected to an external steam pipe, a coolant supply pipe assembly provided above the steam supply pipe assembly, the two outlets of the coolant supply pipe assembly respectively connected to the interior of the cooling units, and the liquid inlet of the coolant supply pipe assembly connected to an external cold source.

[0008] In any of the above embodiments, preferably, the cooling unit includes a vertically arranged cooling silo, the bottom of which is fixed to the top of the reflux pool, and the top of which is installed on the top of the reheating unit. A spiral cooling pipe is provided inside the cooling silo, and a flowing coolant is introduced into the spiral cooling pipe. The upper inlet pipe of the spiral cooling pipe extends horizontally to the outside of the cooling silo and is connected to the coolant supply pipe assembly. The lower outlet pipe of the spiral cooling pipe extends horizontally to the outside of the cooling silo and is connected back to the external cold source end through the reflux pipe. An inner cylinder cavity for steam to flow upward is formed between the cooling silo and the spiral cooling pipe. The interface of the lower outer wall of the cooling silo is connected to the steam supply pipe assembly and allows high-temperature steam to enter the inner cylinder cavity.

[0009] In any of the above embodiments, it is preferred that the steam supply pipe assembly includes a three-way air inlet pipe, and the two branch air outlet pipes of the three-way air inlet pipe extend into the interior of the inner cylinder cavity and are connected to the inner cylinder cavity. An air inlet control valve is installed on each branch air outlet pipe, and the inlet end of the three-way air inlet pipe is connected to an external steam pipe.

[0010] In any of the above embodiments, it is preferred that the coolant supply pipe assembly includes a three-way inlet pipe, the two branch outlet pipes of the three-way inlet pipe extend into the inner cylinder cavity and are connected to the inlet end of the spiral cooling pipe, and an inlet control valve is installed on each branch outlet pipe, and the inlet end of the three-way inlet pipe is connected to an external cold source.

[0011] In any of the above embodiments, it is preferred that a reflux control valve is installed on each of the reflux lines.

[0012] In any of the above embodiments, it is preferred that the reheating unit includes a horizontally arranged reheating pipeline, the bottom inlet pipe of the reheating pipeline is connected to the top outlet end of the cooling silo, an exhaust pipe section is fixedly installed at the top of the middle section of the reheating pipeline, and electric heating rings are installed on the outer side walls of the reheating pipeline on both sides of the exhaust pipe section, and the electric heating rings are heated by an external unit.

[0013] In any of the above embodiments, it is preferred that the spiral cooling pipe is made of copper.

[0014] In any of the above embodiments, it is preferred that the helix angle of the spiral cooling pipe is set between 45° and 60°.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This device condenses water vapor in high-temperature steam into liquid water through a cooling unit, which greatly reduces the white water vapor plumes formed in the atmosphere when steam is discharged due to the cooling of water vapor. This achieves the effect of eliminating white vapor from steam, reduces the impact on the appearance of the environment, avoids visual pollution caused by white water vapor plumes, and improves the aesthetics of the surrounding environment of the enterprise.

[0017] The condensate generated during the cooling process is collected in a return pool, enabling water recycling and reuse. This not only saves water resources and reduces the company's water costs, but also aligns with the concept of sustainable development, reducing the company's dependence on fresh water resources and improving water utilization efficiency.

[0018] 2. The entire whitening device consists of a reflux tank, a cooling unit, and a reheating unit, with each unit installed compactly. The cooling unit is installed on top of the reflux tank, and the reheating unit is installed on top of the cooling unit. The layout of the steam supply pipe assembly, coolant supply pipe assembly, etc., is reasonable, saving floor space and making it suitable for production sites with limited space, thus improving the efficiency of site utilization.

[0019] 3. The cooling unit uses spiral cooling pipes, which increases the contact area between the coolant and high-temperature steam, making the cooling effect more efficient and quickly cooling the high-temperature steam and condensing the water vapor. The reheating unit can promptly reheat the cooled gas, ensuring that the temperature of the discharged gas meets relevant requirements and preventing adverse effects on the surrounding environment caused by low-temperature gas discharge. For example, it avoids phenomena such as fogging caused by excessively low local air temperatures due to low-temperature gas, thus ensuring the stability and effectiveness of the equipment operation.

[0020] 4. The coolant circulates between the external cold source and the spiral cooling pipe, continuously providing cooling capacity to the cooling unit, reducing coolant consumption, lowering operating costs, and ensuring the continuity and stability of the cooling effect, thereby improving the overall operating efficiency of the whitening device. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model.

[0024] Parts list: 1. Reflux tank; 2. Cooling unit; 3. Reheating unit; 4. Cooling silo; 5. Spiral cooling pipe; 6. Three-way air inlet pipe; 7. Air inlet control valve; 8. Three-way liquid inlet pipe; 9. Liquid inlet control valve; 10. Reflux control valve; 11. Reheating pipeline; 12. Exhaust pipe section; 13. Electric heating ring. Detailed Implementation

[0025] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-2 As shown in the image.

[0026] Example 1: A steam de-whitening device includes a return pool 1 fixed on the ground, two cooling units 2 symmetrically installed on the top of the return pool 1, and a reheating unit 3 installed on the top of the two cooling units 2. The two air inlets of the reheating unit 3 are connected to the air outlets of the corresponding cooling units 2. A steam supply pipe assembly is installed between the two cooling units 2. The two outlets of the steam supply pipe assembly are respectively connected to the interior of the cooling unit 2. The air inlet of the steam supply pipe assembly is connected to an external steam pipe. A coolant supply pipe assembly is provided above the steam supply pipe assembly. The two outlets of the coolant supply pipe assembly are respectively connected to the interior of the cooling unit 2. The liquid inlet of the coolant supply pipe assembly is connected to an external cold source.

[0027] In this invention, the whitening device relies on a coolant supply pipe assembly connected to an external cold source when processing high-temperature steam. The coolant from the external cold source enters the coolant supply pipe assembly through a pipeline, which then delivers the coolant to the interior of the two cooling units 2. The high-temperature steam from the outside enters the steam supply pipe assembly through an external steam pipe, and then enters the interior of the cooling unit 2. The high-temperature steam contacts and cools the surface of the low-temperature spiral cooling pipe 5 in the cooling unit 2. The cooled gas rises continuously and flows into the upper reheating unit 3. After reheating, it flows outward. The condensate generated during the cooling process flows downward along the outer wall of the spiral cooling pipe 5 and eventually flows into the return pool 1 for collection and recycling.

[0028] In any of the above embodiments, preferably, the cooling unit 2 includes a vertically arranged cooling silo 4, the bottom of which is fixed to the top of the reflux pool 1, and the top of which is installed on the top of the reheating unit 3. A spiral cooling pipe 5 is provided inside the cooling silo 4, and a flowing coolant is introduced into the spiral cooling pipe 5. The upper inlet pipe of the spiral cooling pipe 5 extends horizontally to the outside of the cooling silo 4 and is connected to the coolant supply pipe assembly. The lower outlet pipe of the spiral cooling pipe 5 extends horizontally to the outside of the cooling silo 4 and is connected back to the external cold source end through the reflux pipe. An inner cylinder cavity for steam to flow upward is formed between the cooling silo 4 and the spiral cooling pipe 5. The interface of the lower outer wall of the cooling silo 4 is connected to the steam supply pipe assembly and allows high-temperature steam to enter the inner cylinder cavity.

[0029] It should be noted that the cooling unit 2 mainly relies on the spiral cooling pipe 5 to transfer the low temperature of the internal coolant to the inner cylinder cavity of the cooling silo 4, and then the high temperature steam inside the inner cylinder cavity is condensed. The water in the high temperature steam after condensation will condense into water droplets and flow down along the spiral cooling pipe 5, and then enter the return pool 1 below for collection. The cooled steam flows up continuously into the reheating unit 3 and is discharged after being reheated.

[0030] In any of the above embodiments, it is preferred that the steam supply pipe assembly includes a three-way air inlet pipe 6, and the two branch air outlet pipes of the three-way air inlet pipe 6 extend into the interior of the inner cylinder cavity and are connected to the inner cylinder cavity. An air inlet control valve 7 is installed on each branch air outlet pipe, and the inlet end of the three-way air inlet pipe 6 is connected to an external steam pipe.

[0031] The inclusion of a three-way inlet pipe 6 and an inlet control valve 7 in the steam supply pipe assembly enhances the adaptability of the unit. In actual production, steam generation often fluctuates with changes in operating conditions. The inlet control valve 7 allows for timely adjustment of the steam flow into the cooling unit 2 based on changes in steam production, ensuring that the cooling unit 2 always operates under optimal processing load. This means that regardless of whether steam production increases or decreases, the unit can efficiently eliminate steam whitening, preventing poor treatment results due to fluctuations in steam volume.

[0032] Furthermore, precise steam flow control can indirectly improve the energy efficiency of the unit. When the steam volume decreases, appropriately reducing the opening of the inlet control valve 7 can prevent the cooling unit 2 from excessively consuming coolant and the energy of the subsequent reheating unit 3 when processing a small amount of steam. Conversely, when the steam volume increases, reasonably increasing the opening of the inlet control valve 7 allows the unit to fully utilize its processing capacity, achieves rational energy utilization, and further reduces the operating costs of the unit.

[0033] In any of the above embodiments, it is preferred that the coolant supply pipe assembly includes a three-way inlet pipe 8, and the two branch outlet pipes of the three-way inlet pipe 8 extend into the interior of the inner cylinder cavity and are connected to the inlet end of the spiral cooling pipe 5. An inlet control valve 9 is installed on each branch outlet pipe, and the inlet end of the three-way inlet pipe 8 is connected to an external cold source.

[0034] The inclusion of a three-way inlet pipe 8 and an inlet control valve 9 in the coolant supply pipe assembly significantly enhances the operational flexibility of the unit. Under different production conditions, parameters such as steam output and temperature fluctuate, resulting in varying cooling capacity requirements. The inlet control valve 9 allows for rapid response to these changes, precisely matching the coolant flow rate with actual cooling demands. This means that regardless of changing operating conditions, the unit can operate efficiently without being affected by insufficient or excessive cooling capacity, ensuring effective whitening and efficient energy utilization.

[0035] Furthermore, precise coolant flow control helps to further reduce operating costs. It avoids energy waste caused by excessive coolant supply (cooling coolant at an external cold source requires energy), and also reduces unnecessary operating losses of equipment such as coolant circulation pumps. Reasonable flow regulation can also extend equipment lifespan, as a stable and appropriate coolant flow reduces impact on pipes and spiral cooling pipes, lowering the risk of equipment failure and saving companies on equipment maintenance and replacement costs in the long run.

[0036] In any of the above embodiments, it is preferred that a reflux control valve 10 is installed on each of the reflux pipelines.

[0037] Example 2: Compared with Example 1, this example also includes the following technical features:

[0038] In any of the above embodiments, it is preferred that the reheating unit 3 includes a horizontally arranged reheating pipeline 11, the bottom inlet pipe of the reheating pipeline 11 is connected to the top outlet end of the cooling silo 4, an exhaust pipe section 12 is fixedly installed at the top of the middle section of the reheating pipeline 11, and an electric heating ring 13 is installed on the outer side wall of the reheating pipeline 11 on both sides of the exhaust pipe section 12, and the electric heating ring 13 is heated by an external unit.

[0039] The design of the reheating unit 3 using an electric heating ring 13 offers significant advantages. Heated by an external unit, the electric heating ring 13 allows for precise control of the heating power, thereby accurately adjusting the reheating temperature. Under different production conditions, regardless of the initial temperature of the cooled gas entering the reheating unit 3, the power of the electric heating ring 13 can be adjusted to heat the gas to the ideal emission temperature. Compared to some traditional heating methods, this precise temperature control effectively avoids excessively low emission temperatures due to insufficient heating, preventing environmental problems and preventing energy waste caused by overheating. Furthermore, the electric heating ring 13 is installed on the outer wall of the reheating pipeline 11, resulting in a relatively simple structure that facilitates installation, maintenance, and replacement. During equipment operation, if any electric heating ring 13 malfunctions, it can be quickly repaired or replaced, reducing downtime, ensuring the stable operation of the entire whitening device, and improving production continuity and reliability.

[0040] In any of the above embodiments, it is preferred that the spiral cooling pipe 5 is made of copper.

[0041] During the steam cooling stage, the spiral cooling pipe 5, made of copper, offers a unique advantage due to its superior thermal conductivity compared to many other common metals. When the low-temperature coolant from the coolant supply pipe assembly flows within the copper pipe, the thermal conductivity of the copper allows for a more rapid and efficient transfer of the coolant's low temperature to the pipe wall. This enables faster heat transfer from the high-temperature steam inside the inner cylinder to the low-temperature coolant when they come into contact with the copper pipe surface, thus accelerating the heat exchange process.

[0042] Compared to cooling pipes made of other materials, the spiral cooling pipe 5 made of copper can cool high-temperature steam in a shorter time. The water vapor condenses into small water droplets more quickly, which then flow down along the outer wall of the copper pipe and eventually into the return pool 1.

[0043] In any of the above embodiments, it is preferred that the helix angle of the spiral cooling pipe 5 is set between 45° and 60°.

[0044] To ensure that the coolant can quickly spiral down the sidewall, the spiral angle is appropriately increased, and the component of gravity along the spiral direction is used to enhance its fluidity.

[0045] Specific working principle: Steam cooling stage: High-temperature steam flows into the steam supply pipe group from the external steam pipe. The three-way air inlet pipe 6 in the pipe group evenly distributes the steam to the two branch air outlet pipes. After the flow rate is precisely adjusted by the air inlet control valve 7, it enters the inner cylinder cavity of the cooling unit 2. The cooling unit 2 mainly consists of the cooling silo 4 and the internal spiral cooling pipe 5.

[0046] The spiral cooling pipe 5 is made of copper to ensure efficient heat conduction. The coolant is introduced from the external cold source via a three-way inlet pipe 8 of the coolant supply assembly. After the flow rate is regulated by the inlet control valve 9 on the branch outlet pipe, the coolant flows into the spiral cooling pipe 5. Due to the excellent thermal conductivity of copper, the low temperature of the coolant is rapidly transferred to the pipe wall. This allows the high-temperature steam inside the inner cylinder to contact the copper pipe surface, resulting in rapid heat transfer from the steam to the coolant, achieving efficient heat exchange. Water vapor in the steam condenses into small water droplets upon contact with the coolant and flows down the outer wall of the spiral cooling pipe 5 into the return pool 1 for collection.

[0047] Steam reheating stage: After cooling, the gas temperature decreases and most of the water vapor has been removed. This gas rises and enters the reheating unit 3. The bottom inlet pipe of the reheating pipe 11 of the reheating unit 3 is connected to the top outlet end of the cooling silo 4, and the gas enters the reheating pipe 11. An exhaust pipe section 12 is provided at the top of the middle section of the reheating pipe 11 to discharge the reheated gas.

[0048] Electric heating rings 13, which adopt existing technology, are installed on the outer walls of the reheating pipes 11 on both sides of the exhaust pipe section 12. Powered by an external unit, they generate heat during operation and transfer it to the reheating pipes 11 to heat the gas inside the pipes. After the gas temperature rises to a suitable temperature, it is discharged from the exhaust pipe section 12.

[0049] Coolant circulation stage: After absorbing heat from the high-temperature steam inside the spiral cooling pipe 5, the coolant temperature rises. The lower outlet pipe of the spiral cooling pipe 5 sends the heated coolant back to the external cold source through the return pipe.

[0050] At the cold source end, the coolant is cooled and restored to a low temperature state, and then enters the spiral cooling pipe 5 again through the coolant supply pipe assembly. This cycle repeats continuously, providing low-temperature coolant to the cooling unit 2 to ensure the cooling effect on the high-temperature steam.

[0051] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0052] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A white smoke eliminating device for producing steam, characterized by: The application relates to a cooling device, which comprises a backflow pool fixed on the ground, two cooling units symmetrically arranged on the top of the backflow pool, a reheat unit arranged on the top of the two cooling units, two air inlets of the reheat unit connected with the air outlets of the corresponding cooling units, a steam supply pipe group arranged between the two cooling units, two outlet ends of the steam supply pipe group connected with the interiors of the cooling units respectively, an air inlet end of the steam supply pipe group connected with an external steam pipeline, a cooling liquid supply pipe group arranged above the steam supply pipe group, two output end of the cooling liquid supply pipe group connected with the interiors of the cooling units respectively, and a liquid inlet end of the cooling liquid supply pipe group connected with an external cold source end.

2. A white smoke eliminating device for producing steam according to claim 1, characterized in that: The cooling unit comprises a cooling silo arranged vertically, the bottom of the cooling silo is fixed on the top of the backflow pool, the top of the cooling silo is arranged on the top of the reheat unit, a spiral cooling pipe is arranged in the interior of the cooling silo, the interior of the spiral cooling pipe is connected with flowing cooling liquid, an upper liquid inlet pipe of the spiral cooling pipe horizontally penetrates out of the exterior of the cooling silo and is connected with the cooling liquid supply pipe group, a lower liquid outlet pipe of the spiral cooling pipe horizontally penetrates out of the exterior of the cooling silo and is connected with the external cold source end through a backflow pipeline, an inner cylinder cavity for the upward flow of steam is formed between the cooling silo and the spiral cooling pipe, and the interface of the lower exterior side wall of the cooling silo is connected with the steam supply pipe group and the high-temperature steam enters the inner cylinder cavity.

3. A white smoke eliminating device for producing steam according to claim 2, characterized in that: The steam supply pipe group comprises a three-way air inlet pipe, two branch air outlet pipes of the three-way air inlet pipe respectively extend into the interior of the inner cylinder cavity and are connected with the inner cylinder cavity, an air inlet control valve is arranged on each branch air outlet pipe, and the inlet end of the three-way air inlet pipe is connected with an external steam pipeline.

4. A white smoke eliminating apparatus for producing steam according to claim 3, characterized in that: The cooling liquid supply pipe group comprises a three-way liquid inlet pipe, two branch liquid outlet pipes of the three-way liquid inlet pipe respectively extend into the interior of the inner cylinder cavity and are connected with the inlet end of the spiral cooling pipe, a liquid inlet control valve is arranged on each branch liquid outlet pipe, and the inlet end of the three-way liquid inlet pipe is connected with an external cold source end.

5. A white smoke eliminating device for producing steam according to claim 4, characterized in that: A backflow control valve is arranged on each backflow pipeline.

6. A white smoke eliminating apparatus for producing steam according to claim 5, characterized in that: The reheat unit comprises a horizontally arranged reheat pipeline, the bottom inlet pipe of the reheat pipeline is connected with the top outlet end of the cooling silo, an exhaust pipe section is fixedly arranged on the top of the middle section of the reheat pipeline, an electric heating ring is arranged on the exterior side wall of the reheat pipeline on the two sides of the exhaust pipe section, and the electric heating ring is heated by an external unit.

7. A white smoke eliminating device for producing steam according to claim 6, characterized in that: The spiral cooling pipe is made of copper pipe.

8. A white smoke eliminating device for producing steam according to claim 7, characterized in that: The spiral angle of the spiral cooling pipe is arranged between 45 DEG and 60 DEG.

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