Phosphoric acid production device

Abstract

The utility model discloses a phosphoric acid production device. The system comprises a first set of desalted water heater, a second set of desalted water heater, a first set of deaerator, a second set of deaerator, a third set of deaerator, a first set of economizer and a second set of economizer, the first set of desalted water heater is respectively communicated with the first set of deaerator, the second set of deaerator and the third set of deaerator through pipelines, and the second set of desalted water heater is respectively communicated with the first set of deaerator, the second set of deaerator and the third set of deaerator through pipelines; the first set of coal economizer is communicated with the first set of deaerator through a pipeline, and the second set of coal economizer is communicated with the second set of deaerator through a pipeline.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of phosphoric acid production equipment, in particular to a phosphoric acid production device. BACKGROUND

[0002] At present, the desalted water heater and the boiler system in the sulfuric acid production device have problems of operation efficiency and resource waste. In the sulfuric acid production process, the feedwater pipeline of the AB set low-temperature recovery desalted water heater enters the C set deaerator through a parallel mode after the outlet of the desalted water heater. However, during the system startup, due to the small water consumption of the device, a large amount of steam and desalted water is wasted in the initial stage of startup. This phenomenon is mainly because, in order to prevent the desalted water heater from dry burning during the startup of the device, a large water inflow needs to be maintained, so that the water inflow of the deaerator is much larger than the actual water consumption of the system. At the same time, in order to maintain the temperature and pressure of the deaerator, the steam consumption needs to be increased, which leads to a large fluctuation range of the water level and pressure of the deaerator, which is difficult to control and increases the adjustment difficulty of the system.

[0003] In addition, when the AB set system is just started, the outlet pressure of the boiler feedwater pump is large due to the small water consumption of the boiler. In order to prevent the outlet pressure of the boiler feedwater pump from being too high, and to prevent the dry burning phenomenon of the I and II economizers, the opening of the boiler water inlet valve usually needs to be increased to increase the water inflow. However, this operation mode leads to the increase of the boiler water level, which may eventually lead to excessive pollution and further waste of water resources.

[0004] The main problem of the prior art is that, on the one hand, in order to prevent the desalted water heater from dry burning, the water inflow of the desalted water heater needs to be increased, which makes the water inflow of the deaerator exceed the actual water demand of the system in the initial stage. At the same time, in order to maintain the temperature and pressure of the deaerator, the steam supply needs to be increased, which makes the water level and pressure of the deaerator fluctuate greatly and difficult to adjust. On the other hand, in order to ensure that the outlet pressure of the boiler feedwater pump does not exceed the pressure and prevent the dry burning of the I and II economizers, the boiler water level needs to be controlled by increasing the water inflow, which leads to unnecessary pollution and waste of water and energy. CONTENT OF THE INVENTION

[0005] In order to solve the above technical problems, the present application provides a phosphoric acid production device, comprising:

[0006] a first set of desalted water heater, a second set of desalted water heater, a first set of deaerator, a second set of deaerator, a third set of deaerator, a first set of economizer and a second set of economizer;

[0007] The first set of desalted water heater is connected to the first set of deaerator, the second set of deaerator and the third set of deaerator through pipelines, and the second set of desalted water heater is connected to the first set of deaerator, the second set of deaerator and the third set of deaerator through pipelines; the first set of coal economizer is connected to the first set of deaerator through pipelines, and the second set of coal economizer is connected to the second set of deaerator through pipelines.

[0008] Optionally, the first set of coal economizer comprises a first coal economizer and a second coal economizer, and the first coal economizer and the second coal economizer are connected to each other through pipelines.

[0009] Optionally, the second set of coal economizer comprises a third coal economizer and a fourth coal economizer, and the third coal economizer and the fourth coal economizer are connected to each other through pipelines.

[0010] Optionally, the first set of deaerator, the second set of deaerator and the third set of deaerator are each provided with an independent water inlet adjusting valve to adjust the amount of desalted water entering each deaerator.

[0011] Optionally, the first set of desalted water heater and the second set of desalted water heater are each provided with a temperature sensor for detecting the temperature of the desalted water and adjusting the heating intensity in real time.

[0012] Optionally, the first set of deaerator and the second set of deaerator are each provided with a pressure sensor on the outlet pipeline for monitoring the pressure change in the deaerator.

[0013] Optionally, the first coal economizer, the second coal economizer, the third coal economizer and the fourth coal economizer are each provided with a flow control device for adjusting the water flow through each coal economizer.

[0014] Optionally, the pipelines of the first set of coal economizer and the second set of coal economizer are provided with anti-blocking filters to prevent impurities from entering the coal economizer and affecting the normal operation of the device.

[0015] Optionally, the water inlet adjusting valve is connected to an automatic control system.

[0016] Optionally, the water inlet of the first set of desalted water heater and the second set of desalted water heater is provided with a temperature regulator.

[0017] From the above technical solutions, the present application has the following advantages:

[0018] 1. By arranging multiple desalted water heaters and coal economizers in the phosphoric acid production device, the heat energy resources can be fully utilized, and the overall heat exchange efficiency can be improved. The first set and the second set of desalted water heaters are connected to three deaerators respectively, so that each deaerator can obtain appropriate heat input under different working conditions, thereby reducing energy waste.

[0019] 2、The design of the device allows for optimal distribution and recycling of desalinated water between the various heaters, avoiding excessive consumption of water resources. In addition, by rationally distributing the water inlet and heating of the deaerator, water resources can be better controlled and utilized, reducing water consumption during production.

[0020] 3、Due to the multi-path connection design of the first and second desalinated water heaters and the economizer, the operating personnel can flexibly adjust the operating parameters (such as flow, temperature and pressure, etc.) of each component according to the production demand and system running state, so that the device can adapt to different production loads and environmental conditions, improving the stability and reliability of the system.

[0021] 4、At the start of the system, through the rational design of the pipeline connection and control strategy, the waste of steam and desalinated water at the initial stage can be effectively reduced. For example, reducing the water inlet amount of the deaerator and economizer at the initial stage can avoid the waste of resources caused by excessive water and steam.

[0022] 5、The design of connecting multiple deaerators and economizers to multiple heaters simplifies the equipment layout, making it easier to manage and maintain each component. At the same time, it also allows the system to continue running other parts when a local fault occurs, reducing the risk of equipment downtime.

[0023] 6、Through reasonable pipeline design and equipment configuration, the risk of overheating or dry burning during system operation can be reduced, improving the safety of the entire phosphoric acid production device. Especially, precise control and adjustment can be achieved between different equipment, ensuring the smooth and safe production process.

[0024] 7、The design provides a modular combination of multiple heaters and deaerators, facilitating future expansion and upgrading of the system. For example, more economizers can be added or the connection method of existing equipment can be adjusted to meet new production demands or increase production capacity. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 An embodiment structure schematic diagram of the phosphoric acid production device provided in the present application. DETAILED DESCRIPTION

[0026] In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to illustrate the relative positional relationship between the components or constituent parts, and do not particularly limit the specific installation orientation of the components or constituent parts.

[0027] Moreover, the above-mentioned terms can be used to represent other meanings in addition to the positional or positional relationship, for example, the term "upper" can also be used to represent a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0028] In addition, the terms "mounting", "setting", "provided with", "connection", "connected" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] In addition, the structure, proportion, size, etc. drawn in the drawings in this application are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the defined conditions that can be implemented by this application, so they do not have technical substantive significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by this application, still falls within the scope of the technical content disclosed by this application.

[0030] The technical solutions in this application will be described clearly and completely in this application combined with the drawings in this application. Obviously, the described embodiments are only a part of the embodiments of this application, not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of this application.

[0031] Reference Figure 1 This application first provides an embodiment of a phosphoric acid production device, which comprises:

[0032] The first set of desalinated water heater 01, the second set of desalinated water heater 02, the first set of oxygen remover 03, the second set of oxygen remover 04, the third set of oxygen remover 05, the first set of coal economizer 06 and the second set of coal economizer 07;

[0033] The first set of desalinated water heater 01 is connected to the first set of oxygen remover 03, the second set of oxygen remover 04 and the third set of oxygen remover 05 through pipelines, and the second set of desalinated water heater 02 is connected to the first set of oxygen remover 03, the second set of oxygen remover 04 and the third set of oxygen remover 05 through pipelines; the first set of coal economizer 06 is connected to the first set of oxygen remover 03 through pipeline, and the second set of coal economizer 07 is connected to the second set of oxygen remover 04 through pipeline.

[0034] The present embodiment provides a phosphoric acid production device aimed at optimizing the utilization efficiency of heat energy and water resources in the phosphoric acid production process, while improving the stability and operational flexibility of the system. The device mainly includes the following key components: a first set of desalinated water heater 01, a second set of desalinated water heater 02, a first set of deaerator 03, a second set of deaerator 04, a third set of deaerator 05, a first set of economizer 06, and a second set of economizer 07.

[0035] The first set of desalinated water heater 01 and the second set of desalinated water heater 02:

[0036] The first set of desalinated water heater 01 is connected to the first set of deaerator 03, the second set of deaerator 04, and the third set of deaerator 05 through pipelines. In this embodiment, the hot desalinated water produced by the first set of desalinated water heater 01 can be flexibly delivered to any one or multiple deaerators according to production needs.

[0037] The second set of desalinated water heater 02 is designed similarly to the first set, and it is connected to the first set of deaerator 03, the second set of deaerator 04, and the third set of deaerator 05 through pipelines. This configuration allows the hot desalinated water provided by the second set of desalinated water heater 02 to also be supplied to any one or multiple deaerators.

[0038] The first set of deaerator 03, the second set of deaerator 04, and the third set of deaerator 05:

[0039] The main function of these three sets of deaerators is to remove oxygen from desalinated water to prevent oxygen corrosion. Each deaerator is connected to two sets of desalinated water heaters and can receive preheated desalinated water from any one or both sets of heaters according to system needs.

[0040] Through this parallel connection method, the water inflow and temperature of each deaerator can be independently adjusted to ensure the stability and consistency of the deaeration effect.

[0041] The first set of economizer 06 and the second set of economizer 07:

[0042] The first set of economizer 06 is connected to the first set of deaerator 03 through a pipeline. During the phosphoric acid production process, desalinated water after deaeration can flow into the first set of economizer 06 to further heat the water using boiler flue gas waste heat, thereby improving the utilization efficiency of heat energy.

[0043] The second set of economizer 07 is connected to the second set of deaerator 04 through a pipeline, and its function is similar to that of the first set of economizer 06, which is also responsible for further heating desalinated water after deaeration.

[0044] During the operation of the phosphoric acid production plant, the main task of the two desalinated water heaters is to heat the desalinated water entering the system. The heated desalinated water is transported through pipelines to the first, second, and third sets of deaerators 05. The main function of the deaerators is to remove oxygen from the water to prevent oxygen corrosion of downstream equipment and pipelines.

[0045] When the system is started, the operator can adjust the communication state between each heater and deaerator according to the production load and demand. For example, when the production load is high, the communication valves of multiple heaters and deaerators can be opened at the same time to increase the flow and temperature of the desalinated water, ensuring the deaeration efficiency. When the load is low, part of the communication pipeline can be closed to reduce energy and water resource waste.

[0046] The desalinated water after deaeration treatment is introduced into the first set of economizer 06 and the second set of economizer 07. In the economizer, the desalinated water is further heated using the waste heat of boiler flue gas. This not only increases the water temperature, but also reduces the consumption of boiler fuel, increasing the thermal efficiency of the entire system.

[0047] In an optional embodiment, the first set of economizer 06 includes a first economizer device 08 and a second economizer device 09, and the first economizer device 08 and the second economizer device 09 are connected to each other through pipelines.

[0048] In an optional embodiment, the first set of economizer 06 not only includes a single heat recovery device, but also includes two interconnected devices, namely the first economizer device 08 and the second economizer device 09. The two devices are connected to each other through pipelines to further optimize the heat recovery efficiency and improve the flexibility and stability of the system.

[0049] The first set of economizer 06 in this embodiment is designed to consist of the first economizer device 08 and the second economizer device 09. The two are connected to each other through pipelines, which can provide multiple operation modes, as follows:

[0050] Series mode: In this mode, the first economizer device 08 and the second economizer device 09 are connected in series through pipelines. The desalinated water first enters the first economizer device 08 and is preliminarily heated using the waste heat of boiler flue gas. The water heated by the first economizer device 08 then enters the second economizer device 09 for further heating. The advantage of this mode is that it can maximize the use of waste heat and achieve efficient heat recovery.

[0051] Parallel mode: In this mode, the first and second economizers 08 and 09 receive desalted water from the deaerators independently and perform heating treatment separately. This way allows the system to flexibly adjust the operation state of the heat recovery equipment under different load conditions, such as enabling only one economizer during low load operation to reduce energy consumption, or running both economizers simultaneously during high load to ensure full utilization of heat energy.

[0052] In an alternative embodiment, the second set of economizers 07 includes a third economizer 10 and a fourth economizer 11, which are connected to each other through pipelines.

[0053] In an alternative embodiment, the second set of economizers 07 is further optimized and includes a third economizer 10 and a fourth economizer 11. These two devices are connected to each other through pipelines, thereby improving the heat energy recovery efficiency, operational flexibility, and system reliability of the system.

[0054] In this embodiment, the second set of economizers 07 consists of a third economizer 10 and a fourth economizer 11. These two devices are connected to each other through pipelines and can achieve the following operation modes:

[0055] Series mode: In series mode, the third and fourth economizers 10 and 11 are connected in sequence. Desalted water first enters the third economizer 10 for preliminary heating using the waste heat of boiler flue gas. The heated water then enters the fourth economizer 11 for further heating. This configuration maximizes the recovery and utilization of boiler waste heat, improving the efficiency of heat energy utilization, and is particularly suitable for high load operating conditions.

[0056] Parallel mode: In parallel mode, the third and fourth economizers 10 and 11 independently receive desalted water from the deaerators. The two devices operate independently and can be flexibly adjusted under different operating conditions. For example, during low load, only one economizer can be selected to run to save energy; during high load, both devices can be operated simultaneously to ensure full utilization of heat energy.

[0057] In an alternative embodiment, the first, second, and third deaerators 03, 04, and 05 are each provided with an independent water inlet regulating valve 12 to regulate the amount of desalted water entering each deaerator.

[0058] In an alternative embodiment, the first, second, and third deaerators 03, 04, and 05 are each provided with an independent water inlet regulating valve 12. These regulating valves are used to control the amount of desalted water entering each deaerator, thereby further optimizing the operating efficiency and stability of the entire phosphoric acid production device.

[0059] In this embodiment, each of the first set of deaerators 03, the second set of deaerators 04, and the third set of deaerators 05 is equipped with an independent water inlet regulating valve 12. These regulating valves are designed and installed to allow independent adjustment of the desalted water inlet volume for each deaerator, with specific functions as follows:

[0060] Each deaerator is equipped with a water inlet regulating valve 12, which can be adjusted manually or automatically to precisely control the flow of desalted water entering each deaerator. This design allows independent adjustment of the water inlet volume for a single deaerator without affecting other deaerators, to adapt to different process requirements or production conditions.

[0061] Through the independent water inlet regulating valve 12, the desalted water volume of each deaerator can be precisely controlled. This allows flexible adjustment of water volume according to actual production needs and deaerator working conditions, avoiding excessive or insufficient water volume affecting deaeration effect.

[0062] Since the water inlet volume of each deaerator can be adjusted independently, operators can ensure that each deaerator operates in the best state under different production loads and environmental conditions, maximizing deaeration efficiency.

[0063] During the production of phosphoric acid, system load may change at any time. Independent water inlet regulating valve 12 allows each deaerator to quickly respond to load changes and adjust the water inlet volume to maintain stable system operation. For example, in high load conditions, the water inlet volume can be increased to meet deaeration needs; in low load conditions, the water inlet volume can be reduced to save water resources and energy.

[0064] By independently adjusting the water inlet volume of each deaerator, the desalted water consumption can be minimized while ensuring deaeration effect, achieving energy saving and consumption reduction. This has a positive contribution to water resource management and energy utilization in the production process of phosphoric acid.

[0065] In an alternative embodiment, the first set of desalted water heaters 01 and the second set of desalted water heaters 02 are each equipped with a temperature sensor for detecting the temperature of the desalted water and adjusting the heating intensity in real time.

[0066] In an alternative embodiment, the first set of desalted water heaters 01 and the second set of desalted water heaters 02 are each equipped with a temperature sensor. The installation of these temperature sensors aims to monitor the temperature of the desalted water in real time, dynamically adjusting the heating intensity of the heaters to ensure efficient operation and stability of the system.

[0067] In this embodiment, the first set of desalted water heaters 01 and the second set of desalted water heaters 02 are each equipped with a precise temperature sensor.

[0068] A temperature sensor is installed at the outlet or inside each desalinated water heater to monitor the temperature of the desalinated water in real-time. These sensors use high-precision temperature measuring elements to ensure quick and accurate detection of temperature changes.

[0069] The temperature sensor is linked to the control system of the heater, which adjusts the heating intensity through feedback signals. This feedback control mechanism can automatically adjust the power output of the heater according to changes in the temperature of the desalinated water, thus achieving precise temperature control.

[0070] In an optional embodiment, pressure sensors are installed on the outlet pipelines of the first set of deaerators 03 and the second set of deaerators 04 to monitor the pressure changes inside the deaerators.

[0071] In an optional embodiment, pressure sensors are installed on the outlet pipelines of the first set of deaerators 03 and the second set of deaerators 04 to monitor the pressure changes inside the deaerators, thus improving the safety and efficiency of the system.

[0072] The pressure sensors are installed on the outlet pipelines of the first set of deaerators 03 and the second set of deaerators 04 at key points to accurately reflect the pressure conditions inside the deaerators.

[0073] The pressure sensors can monitor the pressure changes inside the deaerators in real-time and transmit data to the control system. In this way, the control system can make appropriate adjustments or issue warnings based on the actual pressure conditions.

[0074] In an optional embodiment, flow control devices are installed on the first coal-saving device 08, the second coal-saving device 09, the third coal-saving device 10, and the fourth coal-saving device 11 to adjust the water flow through each device.

[0075] In an optional embodiment, flow control devices are installed on the first coal-saving device 08, the second coal-saving device 09, the third coal-saving device 10, and the fourth coal-saving device 11 to adjust the water flow through each device, thus optimizing the heat exchange process and the overall efficiency of the system.

[0076] The flow control devices are installed on the inlet or outlet pipelines of the first coal-saving device 08, the second coal-saving device 09, the third coal-saving device 10, and the fourth coal-saving device 11 to ensure accurate control of the water flow into or out of each device.

[0077] The flow control devices can use different types of control valves, such as manual valves, electric valves, or automatic adjustment valves, to adapt to different system requirements and levels of automation.

[0078] In an optional embodiment, anti-blocking filters are installed on the pipelines of the first set of economizers 06 and the second set of economizers 07 to prevent impurities from entering the economizers and affecting the normal operation of the device.

[0079] In an optional embodiment, anti-blocking filters are installed on the pipelines of the first set of economizers 06 and the second set of economizers 07, respectively, to prevent impurities from entering the economizers and ensure the normal operation and long-term stability of the device.

[0080] The anti-blocking filters are installed on the water inlet pipelines of the first set of economizers 06 and the second set of economizers 07, respectively, before the economizers. This position can effectively filter impurities in the water entering the economizers and prevent these impurities from entering the economizers.

[0081] The anti-blocking filters can be mechanical filters, such as mesh filters, screen filters, or self-cleaning filters, with appropriate pore sizes and structures to maximize the filtering effect without significantly affecting water flow.

[0082] In an optional embodiment, the water inlet regulating valves 12 are connected to an automatic control system.

[0083] In this embodiment, the water inlet regulating valves 12 are installed on the water inlet pipelines of the first set of deaerators 03, the second set of deaerators 04, and the third set of deaerators 05. Each regulating valve is connected to a central automatic control system.

[0084] The automatic control system intelligently adjusts the opening of each water inlet regulating valve 12 by monitoring the water level, temperature, pressure, and other parameters in each deaerator in real time. The system dynamically adjusts the water inlet quantity of the desalinated water according to actual needs to ensure the efficient operation of each deaerator and maintain the stability of the system.

[0085] In an optional embodiment, temperature regulators are installed at the water inlets of the first set of desalinated water heaters 01 and the second set of desalinated water heaters 02.

[0086] In an optional embodiment, temperature regulators are installed at the water inlets of the first set of desalinated water heaters 01 and the second set of desalinated water heaters 02.

[0087] In this embodiment, temperature regulators are installed at the water inlets of the first set of desalinated water heaters 01 and the second set of desalinated water heaters 02. These temperature regulators sense the temperature of the desalinated water entering the heaters and adjust the water inlet temperature in real time to ensure that the water temperature entering the heaters is within the optimal range.

[0088] It is to be understood that the embodiments that have been described are merely illustrative of the principles of the application. Numerous modifications can be made to the application without departing from the scope of the application. Accordingly, the application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A phosphoric acid production apparatus, characterized by comprising: The utility model relates to a kind of desalination water heater and desalination water heater, which are connected to the first set of oxygen remover, the second set of oxygen remover and the third set of oxygen remover, and the first set of coal economizer and the second set of coal economizer. The first set of desalination water heater is connected to the first set of oxygen remover, the second set of oxygen remover and the third set of oxygen remover through pipelines, and the second set of desalination water heater is also connected to the first set of oxygen remover, the second set of oxygen remover and the third set of oxygen remover through pipelines. The first set of coal economizer includes a first coal economizer and a second coal economizer, and the first coal economizer and the second coal economizer are connected to each other through pipelines.

2. The phosphoric acid production apparatus as claimed in claim 1, wherein The second set of coal economizer includes a third coal economizer and a fourth coal economizer, and the third coal economizer and the fourth coal economizer are connected to each other through pipelines.

3. The phosphoric acid production apparatus as claimed in claim 1, wherein The first set of oxygen remover, the second set of oxygen remover and the third set of oxygen remover are each provided with an independent water inlet regulating valve to regulate the amount of desalination water entering each oxygen remover.

4. The phosphoric acid production apparatus according to claim 1, wherein The first set of desalination water heater and the second set of desalination water heater are each provided with a temperature sensor to detect the temperature of desalination water and adjust the heating intensity in real time.

5. The phosphoric acid production apparatus according to claim 1, wherein The outlet pipelines of the first set of oxygen remover and the second set of oxygen remover are each provided with a pressure sensor to monitor the pressure change inside the oxygen removers.

6. The phosphoric acid production apparatus according to claim 1, wherein The pipelines of the first set of coal economizer and the second set of coal economizer are provided with anti-blocking filters.

7. The phosphoric acid production apparatus according to claim 1, wherein The water inlet regulating valve is connected to an automatic control system.

8. The phosphoric acid production apparatus according to claim 4, wherein The water inlets of the first set of desalination water heater and the second set of desalination water heater are provided with temperature regulators.

9. The phosphoric acid production apparatus according to claim 1, wherein ​

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