阅读说明：本技术 尿素溶液制备方法及其控制方法、设备以及存储介质 (Urea solution preparation method, control method thereof, equipment and storage medium ) 是由 张明龙 于 2021-01-29 设计创作，主要内容包括：本发明公开了一种尿素溶液制备方法,使用尿素水解制氨系统中的蒸汽冷凝液溶解尿素颗粒,制备出所述尿素溶液,同时本公开还提供了一种尿素溶液制备的控制方法,及其设备以及存储介质。该控制方法使用于尿素水解制氨系统的控制器。用于通过控制疏水泵出口阀在尿素溶解时向尿素溶解罐内供给蒸汽冷凝液。本发明使用尿素水解制氨系统中的蒸汽冷凝液代替除盐水溶解尿素颗粒,从而降低尿素溶解制氨系统的运营成本。(The invention discloses a urea solution preparation method, which is used for preparing urea solution by dissolving urea particles by using steam condensate in an ammonia preparation system by urea hydrolysis. The control method is used for a controller of an ammonia production system by urea hydrolysis. For supplying steam condensate to the urea dissolving tank when urea is dissolved by controlling the outlet valve of the drain pump. The invention uses the steam condensate in the urea hydrolysis ammonia production system to replace demineralized water to dissolve urea particles, thereby reducing the operation cost of the urea dissolution ammonia production system.)

1. The preparation method of the urea solution is characterized in that steam condensate in an ammonia production system by urea hydrolysis is used for dissolving urea particles to prepare the urea solution.

2. A control method for urea solution preparation, which is used for a controller of an ammonia production system by urea hydrolysis, is characterized by comprising the following steps:

obtaining a urea dissolving signal, wherein the urea dissolving signal comprises urea dissolving amount, and the urea solution batching water amount is obtained according to the urea dissolving amount;

generating a liquid inlet signal, and responding to the liquid inlet signal, and opening a drain pump outlet valve of a drain tank of the urea hydrolysis ammonia production system, wherein steam condensate is stored in the drain tank, and the drain tank is communicated with a urea dissolving tank;

acquiring a real-time liquid level value of the urea dissolving tank, and judging that the added solution amount in the urea dissolving tank is not less than the urea solution batching water amount according to the real-time liquid level value;

if the added solution amount in the urea dissolving tank is smaller than the urea solution proportioning water amount, returning to the step to obtain the real-time liquid level value of the urea dissolving tank until the added solution amount in the urea dissolving tank is not smaller than the urea solution proportioning water amount;

generating a shut-off signal if the amount of added solution in the urea dissolving tank is not less than the amount of urea solution dosing water, the drain pump outlet valve closing in response to the shut-off signal;

a loading signal is generated, and in response to the loading signal, the urea dissolving tank feed on-off valve is opened and a heating valve of the urea solution tank is opened for a first duration.

3. The method according to claim 2, wherein the step of obtaining a real-time level value of the urea dissolving tank and determining whether the added solution amount in the urea dissolving tank is not less than the urea solution dosing water amount according to the real-time level value further comprises:

acquiring the liquid level value of the steam condensate of the drain tank, and judging whether the liquid level value of the steam condensate is smaller than the lowest value of the drain tank;

generating a shut-off signal if the vapor condensate level value is less than a trap floor value, the trap outlet valve being closed in response to the shut-off signal;

if the steam condensate liquid level value is not less than the lowest value of a drain tank, executing the step if the added solution amount in the urea dissolving tank is not less than the urea solution batching water amount, generating a closing signal, and responding to the closing signal, and closing the outlet valve of the drain pump; and

and if the added solution amount in the urea dissolving tank is smaller than the urea solution proportioning water amount, returning to the step to obtain the real-time liquid level value of the urea dissolving tank until the added solution amount in the urea dissolving tank is not smaller than the urea solution proportioning water amount.

4. The method of claim 3, wherein the step of generating a shut off signal if the steam condensate level value is less than a trap floor value, the trap outlet valve being closed in response to the shut off signal, further comprises:

acquiring a steam condensate liquid level value of the drain tank, and judging whether the steam condensate liquid level value is not less than the lowest value of the drain tank, which can be added with water;

if the liquid level value of the steam condensate is not less than the lowest value of the drain tank, generating a second liquid inlet signal, and responding to the second liquid inlet signal to open the drain pump outlet valve;

if the steam condensate liquid level value is smaller than the lowest value of the drain tank, returning to the step to obtain the steam condensate liquid level value of the drain tank until the steam condensate liquid level value is not smaller than the lowest value of the drain tank.

5. The method of claim 3, wherein the step of generating a shut off signal if the steam condensate level value is less than a trap floor value, the trap outlet valve being closed in response to the shut off signal, further comprises:

and generating a desalted water inlet signal, wherein a dissolving tank switch valve of the urea dissolving tank is opened, and the desalted water enters the urea dissolving tank.

6. The method of claim 1, wherein the step of generating a load signal in response to which the urea solution tank feed on-off valve is opened and a heating valve of the urea solution tank is opened for a first period of time further comprises:

acquiring a real-time temperature value of the urea dissolving tank, and judging that the real-time temperature value is not less than a temperature set value;

if the real-time temperature value is not less than the temperature set value, generating a desalted water inlet signal, responding to the desalted water inlet signal, opening a dissolving tank switch valve of the urea dissolving tank, and allowing desalted water to enter the urea dissolving tank until the real-time temperature value is less than the temperature set value;

and if the real-time temperature value is smaller than the temperature set value, generating a desalted water stop liquid feeding signal, and responding to the desalted water stop liquid feeding signal, and closing a dissolving tank switch valve of the urea dissolving tank.

7. The method of claim 6, wherein said obtaining a real-time temperature value of said urea dissolving tank further comprises:

judging that the real-time temperature value is not less than a second temperature set value, wherein the second temperature set value is less than the temperature set value;

and if the real-time temperature is less than the second temperature set value, generating a heating signal, and opening a heating valve of the urea solution tank until the real-time temperature is not less than the second temperature set value.

8. The method of claim 7, wherein said step of obtaining a real-time temperature value of said urea dissolving tank further comprises:

judging whether the real-time temperature value is greater than a third temperature set value and less than the set temperature value, wherein the third temperature set value is between the temperature set value and the second temperature set value;

and if the real-time temperature value is greater than a third temperature set value and less than the set temperature value, generating an exhaust signal, and responding to the exhaust signal, and starting an exhaust fan of the urea dissolving tank until the real-time temperature value is not greater than the third temperature set value.

9. An electronic device, comprising:

a processor; and

a memory for storing computer program instructions;

wherein the processor executes the control method for urea solution preparation according to any one of claims 2-8 when the computer program is loaded and run by the processor.

10. A computer-readable storage medium, characterized in that it stores computer program instructions which, when loaded and executed by a processor, execute the control method of urea solution preparation according to any one of claims 2-8.

Technical Field

The invention belongs to the technical field of flue gas nitrogen oxide pollutant removal, and particularly relates to a urea solution preparation method, a control method, equipment and a storage medium thereof.

Background

The core for controlling the emission of nitrogen oxides in a coal-fired power plant is a flue gas denitration technology, and a urea hydrolysis method is one of the most popular denitration methods at present because of safety and reliability.

However, the inventor of the present disclosure finds the following problems in the prior art in the process of implementing the technical solution of the present disclosure: the urea of present power plant dissolves work and only stops in manual operation on-the-spot, occupies manpower resources and is many, wastes time and energy, because personnel's operation is not standard, causes the phenomenon that the pipeline was blockked up in the urea solution crystallization and takes place occasionally. In addition, most of the existing urea dissolving tanks are configured by using desalted water when the urea solution dosing water is configured, so that the production cost is higher.

Disclosure of Invention

In order to solve the above problems of the prior art, embodiments of the present application provide a urea solution preparation method, a control method thereof, an apparatus, and a storage medium.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

in a first aspect, the present disclosure provides a urea solution preparation method, in which a steam condensate in an ammonia production system by urea hydrolysis is used to dissolve urea particles, so as to prepare the urea solution.

In a second aspect, the present disclosure provides a control method for urea solution preparation, which is applied to a controller of an ammonia production system by urea hydrolysis, and the control method includes:

obtaining a urea dissolving signal, wherein the urea dissolving signal comprises urea dissolving amount, and the urea solution batching water amount is obtained according to the urea dissolving amount;

generating a liquid inlet signal, and responding to the liquid inlet signal, and opening a drain pump outlet valve of a drain tank of the urea hydrolysis ammonia production system, wherein steam condensate is stored in the drain tank, and the drain tank is communicated with a urea dissolving tank;

acquiring a real-time liquid level value of the urea dissolving tank, and judging that the added solution amount in the urea dissolving tank is not less than the urea solution batching water amount according to the real-time liquid level value;

if the added solution amount in the urea dissolving tank is smaller than the urea solution proportioning water amount, returning to the step to obtain the real-time liquid level value of the urea dissolving tank until the added solution amount in the urea dissolving tank is not smaller than the urea solution proportioning water amount;

generating a shut-off signal if the amount of added solution in the urea dissolving tank is not less than the amount of urea solution dosing water, the drain pump outlet valve closing in response to the shut-off signal;

a loading signal is generated, and in response to the loading signal, the urea dissolving tank feed on-off valve is opened and a heating valve of the urea solution tank is opened for a first duration.

Further, the step of obtaining a real-time level value of the urea dissolving tank, and judging whether the added solution amount in the urea dissolving tank is not less than the urea solution batching water amount according to the real-time level value, and then further comprising:

acquiring the liquid level value of the steam condensate of the drain tank, and judging whether the liquid level value of the steam condensate is smaller than the lowest value of the drain tank;

generating a shut-off signal if the vapor condensate level value is less than a trap floor value, the trap outlet valve being closed in response to the shut-off signal;

if the steam condensate liquid level value is not less than the lowest value of a drain tank, executing the step if the added solution amount in the urea dissolving tank is not less than the urea solution batching water amount, generating a closing signal, and responding to the closing signal, and closing the outlet valve of the drain pump; and

and if the added solution amount in the urea dissolving tank is smaller than the urea solution proportioning water amount, returning to the step to obtain the real-time liquid level value of the urea dissolving tank until the added solution amount in the urea dissolving tank is not smaller than the urea solution proportioning water amount.

Further, the step of generating a close signal if said vapor condensate level value is less than a trap floor value, said trap outlet valve closing in response to said close signal, further comprises:

acquiring a steam condensate liquid level value of the drain tank, and judging whether the steam condensate liquid level value is not less than the lowest value of the drain tank, which can be added with water;

if the liquid level value of the steam condensate is not less than the lowest value of the drain tank, generating a second liquid inlet signal, and responding to the second liquid inlet signal to open the drain pump outlet valve;

if the steam condensate liquid level value is smaller than the lowest value of the drain tank, returning to the step to obtain the steam condensate liquid level value of the drain tank until the steam condensate liquid level value is not smaller than the lowest value of the drain tank.

Further, the step of generating a close signal if said vapor condensate level value is less than a trap floor value, said trap outlet valve closing in response to said close signal, further comprises:

and generating a desalted water inlet signal, wherein a dissolving tank switch valve of the urea dissolving tank is opened, and the desalted water enters the urea dissolving tank.

Further, the step of generating a loading signal in response to which the urea solution tank feed on/off valve is opened and the heating valve of the urea solution tank is opened for a first duration further comprises:

acquiring a real-time temperature value of the urea dissolving tank, and judging that the real-time temperature value is not less than a temperature set value;

if the real-time temperature value is not less than the temperature set value, generating a desalted water inlet signal, responding to the desalted water inlet signal, opening a dissolving tank switch valve of the urea dissolving tank, and allowing desalted water to enter the urea dissolving tank until the real-time temperature value is less than the temperature set value;

and if the real-time temperature value is smaller than the temperature set value, generating a desalted water stop liquid feeding signal, and responding to the desalted water stop liquid feeding signal, and closing a dissolving tank switch valve of the urea dissolving tank.

Further, the step of obtaining a real-time temperature value of the urea dissolving tank further includes:

judging that the real-time temperature value is not less than a second temperature set value, wherein the second temperature set value is less than the temperature set value;

and if the real-time temperature is less than the second temperature set value, generating a heating signal, and opening a heating valve of the urea solution tank until the real-time temperature is not less than the second temperature set value.

Further, the step of obtaining a real-time temperature value of the urea dissolving tank further includes:

judging whether the real-time temperature value is greater than a third temperature set value and less than the set temperature value, wherein the third temperature set value is between the temperature set value and the second temperature set value;

and if the real-time temperature value is greater than a third temperature set value and less than the set temperature value, generating an exhaust signal, and responding to the exhaust signal, and starting an exhaust fan of the urea dissolving tank until the real-time temperature value is not greater than the third temperature set value.

In a third aspect, an embodiment of the present application provides an electronic device, including:

a processor; and

a memory for storing computer program instructions;

wherein the processor executes the control method for urea solution preparation as described before, when the computer program is loaded and run by the processor.

In a fourth aspect, embodiments of the present application provide a computer readable storage medium storing computer program instructions, which when loaded and executed by a processor, causes the processor to perform a method of controlling urea solution production as described above.

The invention has the beneficial effects that: the technical scheme of the embodiment of the disclosure uses the steam condensate in the existing urea dissolving ammonia production system to replace the existing desalted water to prepare the urea solution, thereby reducing the operation cost of the urea dissolving ammonia production system.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a flow chart of one embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an apparatus of one embodiment of the present disclosure;

FIG. 3 is a schematic illustration of a storage medium according to one embodiment of the disclosure.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The SCR flue gas denitration is characterized in that NOx in flue gas is converted into nitrogen and water harmless to the environment by NH3 under the catalysis of a catalyst (metal oxide) at the temperature of 300-400 ℃. Liquid ammonia, ammonia water and urea can be used as a flue gas denitration reducing agent. The ammonia concentration in the ammonia water is low, the transportation cost is high, and metal ions in the ammonia water have certain influence on the service life of the catalyst, so the ammonia water is less applied to SCR engineering of a coal-fired power plant; liquid ammonia is toxic and flammable, and storage capacity of more than 10t becomes a serious hazard source, and transportation and storage of the liquid ammonia have strict requirements, and the difficulty of examination and approval is increased more and more. Urea is an ideal source of NH3, is harmless to humans and the environment, and requires no special procedures for transportation and storage. In recent years, with the improvement of national requirements for safety production, the denitration improvement technical route of each large power generation group power plant requires that urea is adopted as a denitration reducing agent in principle. The current common bird tertiary process flow is as follows: the bagged urea is conveyed to a urea storage room through a truck for storage, the bagged urea is conveyed to a discharge opening of a urea dissolving tank through an electric hoist or a bucket elevator, and the unpacked urea enters the dissolving tank from the discharge opening. Adding desalted water to prepare a urea solution with the mass concentration of 40-60%, and conveying the urea solution to a urea solution storage tank through a urea solution circulating pump. The urea solution in the storage tank enters the hydrolysis reactor through the delivery pump, saturated steam indirectly heats the urea solution in the hydrolyzer through the U-shaped coil, the urea solution is decomposed to generate NH3, CO2 and water vapor, and the mixed gas discharged from the hydrolyzer enters an ammonia-flue gas mixing system and is sprayed into an SCR denitration system through an ammonia spraying system. The pressure and temperature of the hydrolyzer are controlled by the steam supply quantity, and the liquid level of the hydrolyzer is controlled by the flow quantity of the feed pump. However, the cost of desalinated water used in the current urea dissolving process is relatively expensive, which results in relatively high operating costs for the power plant.

Therefore, the technical scheme of the embodiment of the disclosure uses the steam condensate in the existing urea dissolving ammonia production system to replace the existing desalted water to prepare the urea solution, thereby reducing the operation cost of the urea dissolving ammonia production system.

The inventive concepts of the present disclosure are further described below in conjunction with some specific embodiments.

A urea solution preparation method is characterized in that steam condensate in an ammonia production system by urea hydrolysis is used for dissolving urea particles to prepare the urea solution.

It should be noted that, in this embodiment, the steam condensate is used instead of the demineralized water, and the ratio of the demineralized water to the urea particles is not changed, and the ratio of the demineralized water to the urea particles is known to those skilled in the art and is a conventional choice, and will not be described herein again.

Referring to fig. 1, an embodiment of the present disclosure further provides a control method for urea solution preparation, which is used in a controller of an ammonia production system by urea hydrolysis. The control method for urea solution preparation according to the present embodiment is used in a conventional urea hydrolysis ammonia production system. For example, the system includes a urea dissolving tank, a drain tank, and a demineralized water delivery conduit. Specifically, the urea dissolving tank is used for dissolving urea, and the drain tank is used for collecting and containing steam condensate generated by the urea hydrolysis ammonia production system. And a drain pump outlet valve is arranged on a pipeline for communicating the urea dissolving tank with the drain tank. And a dissolving tank switch valve is arranged on the demineralized water conveying pipeline. And all be provided with automatic fluviograph on urea dissolving tank and the drain tank to acquire the water level height in urea dissolving tank and the drain tank in real time. In addition, it should be noted that the outlet valve of the hydrophobic pump and the switch valve of the dissolving tank are all valves controlled by an electromagnetic valve, a pneumatic valve and other controllers.

Specifically, the control method includes:

and S100, obtaining a urea dissolving signal, wherein the urea dissolving signal comprises urea dissolving amount, and obtaining the urea solution batching water amount according to the urea dissolving amount.

Namely, after the controller of the urea hydrolysis ammonia production system receives the urea dissolution signal, the urea dissolution signal can be a signal sent by a urea supplier, or can be a command transmitted to the controller by a central control personnel after pressing a start button.

And the urea dissolution signal includes a urea dissolution amount. The controller calculates the amount of the urea solution ingredient water through the urea dissolving amount. The amount of urea solution dosing water can be characterized by the level of the urea dissolving tank. Specifically, the conversion relationship is as follows: for example, when the level of water in the dissolving tank corresponds to the amount of urea granules, it is based on: m is 3.14 XR²X H x ρ, where R is the radius of the stirrer; h is the liquid level of the dissolving tank; ρ is the density of water. The value of rho is 1.0 multiplied by 10 under normal temperature and pressure³Kg/h3。

And S200, generating a liquid inlet signal, and responding to the liquid inlet signal, and opening a drain pump outlet valve of a drain tank of the urea hydrolysis ammonia production system, wherein steam condensate is stored in the drain tank, and the drain tank is communicated with a urea dissolving tank.

In this step, the controller generates a feed signal to control the hydrophobic pump outlet valve. After the drain pump outlet valve is opened, steam condensate in the drain tank enters the urea dissolving tank under the action of the drain pump.

In addition, it should be noted that, in some embodiments, a hydrophobic inlet pump valve is further disposed between the urea dissolving tank and the hydrophobic pump, and after the hydrophobic inlet pump valve is opened, the steam condensate in the hydrophobic tank can enter the urea dissolving tank under the action of the hydrophobic pump.

I.e. no demineralized water is used in the present disclosure, and preferably steam condensate in the hydrophobic tank.

And S300, acquiring a real-time liquid level value of the urea dissolving tank, and judging that the added solution amount in the urea dissolving tank is not less than the urea solution batching water amount according to the real-time liquid level value.

After the pumping of the steam condensate, it is necessary to detect whether the amount of the steam condensate pumped is sufficient, and in this embodiment, the real-time level value in the urea dissolving tank is detected to determine the subsequent steps.

If the added solution amount in the urea dissolving tank is smaller than the urea solution dosing water amount, returning to step S300 until the added solution amount in the urea dissolving tank is not smaller than the urea solution dosing water amount.

If the added solution amount in the urea dissolving tank is not less than the urea solution dosing water amount, step S400 is executed to generate a closing signal, and the drain pump outlet valve is closed in response to the closing signal.

I.e. when the amount of added solution in the urea dissolving tank is sufficient to dissolve the required amount of urea, the drain pump outlet valve is closed. The pumping of the steam condensate from the steam trap to the urea dissolving tank is stopped.

And S500, generating a feeding signal, wherein in response to the feeding signal, a feeding switch valve of the urea dissolving tank is opened, and a heating valve of the urea solution tank is opened for a first time.

After the solution in the urea dissolving tank is enough, a feeding switch valve of the urea dissolving tank can be opened, and a bucket elevator or a spiral weighing feeder is used for feeding materials to the urea dissolving tank. And the heating valve of the urea solution tank is opened during the feeding process to promote the urea dissolution.

That is, compared with the prior art, the embodiment opens the outlet valve of the drainage pump when urea is dissolved, so that steam condensate is used to replace demineralized water when urea is dissolved, and the cost is reduced.

In some embodiments, the amount of steam condensate in the hydrophobic tank is not constantly replenished because the steam condensate is produced by the urea hydrolysis ammonia production system. Therefore, it is also necessary to monitor the time in which there is sufficient vapor condensate in the hydrophobic tank. Therefore, the control method further includes, after the step S300:

s301, obtaining a steam condensate liquid level value of the drain tank, and judging whether the steam condensate liquid level value is smaller than the lowest value of the drain tank.

If the steam condensate liquid level value is less than the lowest drain tank value, step S302 is executed to generate a close signal, and in response to the close signal, the drain pump outlet valve is closed. The step is used for closing the drain tank, and the phenomenon that the service life of the drain pump is influenced by idle running of the drain pump is avoided.

And if the steam condensate liquid level value is not less than the lowest value of the drain tank, executing the step S400 and the step S500. This step is used to continue pumping steam condensate into the urea dissolving tank when the drain tank has sufficient steam condensate.

The minimum trap level can be set by the operator based on experience.

In some embodiments, steam condensate produced in the urea hydrolysis ammonia production system is continually replenished into the hydrophobic tank after the hydrophobic pump outlet valve is closed. After the amount of the steam condensate supplemented in the drainage tank reaches a certain amount, the steam condensate can be continuously pumped into the urea dissolving tank. Specifically, step S302 is to generate a closing signal, and in response to the closing signal, the drain pump outlet valve is closed, and then the method further includes:

and 303, acquiring a steam condensate liquid level value of the drain tank, and judging whether the steam condensate liquid level value is not less than the lowest value of the drain tank, which can be added with water.

This step is used to measure the amount of vapour condensate replenished in the hydrophobic tank.

If the steam condensate liquid level value is smaller than the lowest value of the drain tank, returning to the step S303, and obtaining the steam condensate liquid level value of the drain tank until the steam condensate liquid level value is not smaller than the lowest value of the drain tank.

If the steam condensate liquid level value is not less than the lowest value of the drain tank which can be added with water, step 304 is executed to generate a second liquid inlet signal, and the drain pump outlet valve is opened in response to the second liquid inlet signal.

This step is used to continue the replenishment of the urea dissolving tank with steam condensate for dissolving the urea particles.

Step S302, generating a closing signal, and in response to the closing signal, closing the drain pump outlet valve, further including:

and generating a desalted water inlet signal, wherein a dissolving tank switch valve of the urea dissolving tank is opened, and the desalted water enters the urea dissolving tank.

Since urea dissolution cannot be stopped halfway, when replenishment of the vapor condensate to the urea dissolution tank is stopped, it is necessary to dissolve urea using normal demineralized water.

In some embodiments, since the urea dissolving process needs to be within a certain temperature interval, step S600 generates a feeding signal, and in response to the feeding signal, the urea dissolving tank feeding switch valve is opened and the heating valve of the urea solution tank is opened for a first duration, and the method further comprises:

step S700, acquiring a real-time temperature value of the urea dissolving tank, and judging that the real-time temperature value is not less than a temperature set value.

And if the real-time temperature value is not less than the temperature set value, executing step S701, generating a desalted water inlet signal, responding to the desalted water inlet signal, opening a dissolving tank switch valve of the urea dissolving tank, and allowing desalted water to enter the urea dissolving tank until the real-time temperature value is less than the temperature set value.

And if the real-time temperature value is smaller than the temperature set value, executing step S702, generating a desalted water stop liquid feeding signal, and responding to the desalted water stop liquid feeding signal, and closing a dissolving tank switch valve of the urea dissolving tank.

For example, when the temperature value in the urea dissolving tank is more than 60 ℃, the desalted water needs to be introduced for cooling.

In some embodiments, said obtaining a real-time temperature value of said urea dissolving tank further comprises:

and judging that the real-time temperature value is not less than a second temperature set value, wherein the second temperature set value is less than the temperature set value.

If the real-time temperature is less than the second temperature set value, step S703 is executed to generate a heating signal, and the heating valve of the urea solution tank is opened until the real-time temperature is not less than the second temperature set value.

For example, when the temperature in the urea dissolving tank is less than 40 ℃, heating is required until the internal temperature of the urea solution tank rises above 40 ℃.

In some embodiments, said obtaining a real-time temperature value of said urea dissolving tank further comprises:

and judging whether the real-time temperature value is greater than a third temperature set value and smaller than the set temperature value, wherein the third temperature set value is between the temperature set value and the second temperature set value.

If the real-time temperature value is greater than the third temperature setting value and less than the setting temperature value, executing step S704, generating an exhaust signal, and in response to the exhaust signal, starting an exhaust fan of the urea dissolving tank until the real-time temperature value is not greater than the third temperature setting value.

For example, when the third temperature setting value is 50 ℃, when the temperature is between 50 ℃ and 60 ℃, the temperature is reduced by using an exhaust fan.

In other embodiments, the control method may be implemented by DCS or PLC, but in actual implementation, it is preferable to implement DCS control, because DCS has better advantages in process control, analog quantity, network form, etc. compared to PLC, and the implementation and implementation of the control method of the present invention can be better satisfied.

Referring to fig. 2, an embodiment of the present application further provides a block diagram of an electronic device, where the electronic device may be a smart phone, a tablet computer, a notebook computer, or a desktop computer. The electronic device may be referred to as a terminal, a portable terminal, a desktop terminal, or the like.

Generally, an electronic device includes: at least one processor 301; and a memory 302 for storing computer program instructions.

The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so on. The processor 301 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor, where the main processor is a processor for processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. Processor 301 may also include an AI (Artificial Intelligence) processor for processing computational operations related to machine learning such that production of risk assessment reports may be self-trained for learning, improving efficiency and accuracy.

Memory 302 may include one or more computer-readable storage media, which may be non-transitory. Memory 302 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 302 is used to store at least one instruction for execution by processor 801 to implement a method of generating a risk assessment report provided by method embodiments herein.

In some embodiments, the terminal may further include: a communication interface 303 and at least one peripheral device. The processor 301, the memory 302 and the communication interface 303 may be connected by a bus or signal lines. Various peripheral devices may be connected to communication interface 303 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of radio frequency circuitry 304, a display screen 305, and a power source 306.

The communication interface 303 may be used to connect at least one peripheral device related to I/O (Input/Output) to the processor 301 and the memory 302. In some embodiments, processor 301, memory 302, and communication interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, the memory 302 and the communication interface 303 may be implemented on a single chip or circuit board, which is not limited in this embodiment.

The Radio Frequency circuit 304 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 304 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 304 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 304 comprises: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 304 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 304 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.

The display screen 305 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 305 is a touch display screen, the display screen 305 also has the ability to capture touch signals on or over the surface of the display screen 305. The touch signal may be input to the processor 301 as a control signal for processing. At this point, the display screen 305 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display screen 305 may be one, the front panel of the electronic device; in other embodiments, the display screens 305 may be at least two, respectively disposed on different surfaces of the electronic device or in a folded design; in still other embodiments, the display screen 305 may be a flexible display screen disposed on a curved surface or a folded surface of the electronic device. Even further, the display screen 305 may be arranged in a non-rectangular irregular figure, i.e. a shaped screen. The Display screen 305 may be made of LCD (liquid crystal Display), OLED (Organic Light-Emitting Diode), and the like.

The power supply 306 is used to power various components in the electronic device. The power source 306 may be alternating current, direct current, disposable or rechargeable. When the power source 306 includes a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.

Fig. 3 shows a schematic structural diagram of a server according to an embodiment of the present application. The server is used for implementing the method for generating the risk assessment report provided in the above embodiment. Specifically, the method comprises the following steps:

the server includes a Central Processing Unit (CPU)401, a system memory 404 including a Random Access Memory (RAM)402 and a Read Only Memory (ROM)403, and a system bus 405 connecting the system memory 404 and the central processing unit 401. The server 400 also includes a basic input/output system (I/O system) 406, which facilitates the transfer of information between devices within the computer, and a mass storage device 407 for storing an operating system 413, application programs 414, and other program modules 415.

The basic input/output system 406 includes a display 408 for displaying information and an input device 409 such as a mouse, keyboard, etc. for user input of information. Wherein the display 408 and the input device 409 are connected to the central processing unit 401 through an input output controller 410 connected to the system bus 405. The basic input/output system 406 may also include an input/output controller 410 for receiving and processing input from a number of other devices, such as a keyboard, mouse, or electronic stylus. Similarly, input/output controller 410 may also provide output to a display screen, a printer, or other type of output device.

The mass storage device 407 is connected to the central processing unit 401 through a mass storage controller (not shown) connected to the system bus 405. The mass storage device 407 and its associated computer-readable media provide non-volatile storage for the server 400. That is, the mass storage device 407 may include a computer-readable medium (not shown) such as a hard disk or CD-ROM drive.

Without loss of generality, the computer-readable media may comprise computer storage media and communication media. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes RAM, ROM, EPROM, EEPROM, flash memory or other solid state memory technology, CD-ROM, DVD, or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices. Of course, those skilled in the art will appreciate that the computer storage media is not limited to the foregoing. The system memory 404 and mass storage device 407 described above may be collectively referred to as memory.

The server 400 may also operate as a remote computer connected to a network via a network, such as the internet, according to various embodiments of the present application. That is, the server 400 may be connected to the network 412 through the network interface unit 411 connected to the system bus 405, or may be connected to other types of networks or remote computer systems (not shown) using the network interface unit 411.

It should be noted that the above-described embodiments of the apparatus are merely schematic, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus necessary general hardware, and may also be implemented by special hardware including special integrated circuits, special CPUs, special memories, special components and the like. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions may be various, such as analog circuits, digital circuits, or dedicated circuits. However, the implementation of a software program is a more preferable embodiment for the present invention. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, where the computer software product is stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a Read-only memory (ROM), a random-access memory (RAM), a magnetic disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.