A water supply control method, device and storage medium for a steam generator

Abstract

The present invention discloses a water supply control method, device and storage medium for a steam generator, wherein the method comprises: calculating the water supply volume of the steam generator according to the relationship between the heating heat, water supply temperature rise energy and steam evaporation energy of the steam generator; setting the lower limit liquid level of the steam generator according to the water supply volume; when the liquid level of the furnace of the steam generator drops to the lower limit liquid level, controlling the water pump to intermittently supply water to the furnace according to the water supply volume until the liquid level of the furnace reaches the preset upper limit liquid level of the furnace. The present invention calculates the water supply volume according to the relationship between the heating heat, water supply temperature rise energy and steam evaporation energy, sets the lower limit liquid level according to the water supply volume and supplies water intermittently, which can effectively improve the stability of the outlet steam pressure of the steam generator when it is working.

Description

Technical Field

[0001] The present invention relates to the technical field of boilers, and in particular to a water supply control method, device and storage medium for a steam generator. Background Art

[0002] The inspection-free fully automatic steam generator has the advantages of small footprint, no pollution, fully automatic system operation, simple operation, and easy mobility. It is widely used in chemical, food, pharmaceutical and other industries. This type of steam generator belongs to Class D boiler according to the "Boiler Safety Supervision Regulations". It does not require annual inspection and boiler workers during use. This type of steam generator consists of a closed furnace, a water pump, an electric heating tube assembly, a control system, a safety valve and other parts. The softened water in the furnace is heated by an electric heating tube to generate steam. The rated steam pressure is 0.7MPa, and the water volume at the normal water level is less than 50L. The water supply control method of the steam generator is usually: set the lower limit value of the liquid level in the furnace. When the water level in the furnace is lower than the preset lower limit value, continue to add water to the furnace until the liquid level in the furnace reaches the preset upper limit value.

[0003] The existing water supply control method of the steam generator cannot accurately set the lower limit of the liquid level, and when the liquid level drops to the lower limit, water is continuously added to the furnace. The injection of cold water causes the temperature inside the furnace to drop sharply, resulting in unstable steam pressure at the furnace outlet. Summary of the invention

[0004] The present invention provides a water supply control method, device and storage medium for a steam generator, so as to solve the technical problem that the existing water supply control method for a steam generator cannot accurately set the lower limit value of the liquid level, and when the liquid level drops to the lower limit value, water is continuously supplied to the furnace, and the injection of cold water causes the temperature in the furnace to drop sharply, resulting in unstable steam pressure at the furnace outlet.

[0005] An embodiment of the present invention provides a water supply control method for a steam generator, comprising:

[0006] The water replenishment volume of the steam generator is calculated based on the relationship between the heating heat of the steam generator, the water replenishment temperature rise energy and the steam evaporation energy;

[0007] Setting the lower limit liquid level of the steam generator according to the water replenishment volume;

[0008] When the liquid level of the furnace of the steam generator drops to the lower limit liquid level, the water pump is controlled according to the water replenishment volume to intermittently add water to the furnace until the liquid level of the furnace reaches the preset upper limit liquid level of the furnace.

[0009] Furthermore, the relationship between the heating heat, water replenishment heating energy and steam evaporation energy of the steam generator is:

[0010] The heating heat of the steam generator ≥ the energy required for water heating + the energy required for steam evaporation.

[0011] Furthermore, the water replenishment volume of the steam generator is calculated based on the relationship between the heating heat of the steam generator, the water replenishment heating energy and the steam evaporation energy, including:

[0012] Obtaining the heating power of the steam generator, the water pump flow rate, the enthalpy value of the water inlet temperature, the evaporation amount of the steam generator, the steam enthalpy value at the lowest temperature of the outlet steam, and the enthalpy value of the condensate;

[0013] The heating power, the water pump flow and the water replenishment volume are used to calculate the heating heat of the steam generator; the water replenishment volume, the condensate enthalpy value and the water enthalpy value at the water inlet temperature are used to calculate the water replenishment heating energy; the water replenishment volume, the steam generator evaporation amount, the steam enthalpy value and the condensate enthalpy value are used to calculate the steam evaporation amount energy;

[0014] The water replenishment volume is calculated based on the relationship between the heating heat, the water replenishment temperature rising energy and the steam evaporation energy.

[0015] Further, setting the lower limit liquid level of the steam generator according to the water replenishment volume includes:

[0016] The difference between the maximum water volume of the furnace and the water replenishment volume is taken as the minimum water volume, and the lower limit liquid level of the furnace is determined according to the minimum water volume.

[0017] Furthermore, the step of controlling the water pump to intermittently supply water to the furnace according to the water replenishment volume includes:

[0018] The minimum steam outlet temperature is set, and the water replenishment volume corresponding to the lower limit liquid level is divided into several parts according to the minimum steam outlet temperature;

[0019] Calculate the pump start time of the water supply interval according to the water replenishment volume, number of portions and water pump flow rate;

[0020] The pump stop time of the water supply interval is calculated according to the number of portions, the heating power, the condensate enthalpy value, the water inlet temperature enthalpy value and the pump start time of the water supply interval;

[0021] The water pump is controlled to intermittently supply water to the furnace according to the number of portions, the pump start time and the pump stop time.

[0022] One embodiment of the present invention provides a water supply control device for a steam generator, comprising:

[0023] A water replenishment volume calculation module, used to calculate the water replenishment volume of the steam generator according to the relationship between the heating heat of the steam generator, the water replenishment temperature rise energy and the steam evaporation energy;

[0024] A lower limit liquid level setting module, used to set the lower limit liquid level of the steam generator according to the water replenishment volume;

[0025] The water supply control module is used to control the water pump to intermittently supply water to the furnace according to the water replenishment volume when the liquid level of the furnace of the steam generator drops to the lower limit liquid level, until the liquid level of the furnace reaches the preset upper limit liquid level of the furnace.

[0026] Furthermore, the root water replenishment volume calculation module is also used for:

[0027] Obtaining the heating power, water pump flow, water inlet temperature enthalpy value and steam generator evaporation capacity of the steam generator;

[0028] The steam enthalpy value and the condensate enthalpy value at the lowest outlet steam temperature are calculated; the heating power, the water pump flow rate and the water replenishment volume are used to calculate the heating heat of the steam generator; the water replenishment volume, the condensate enthalpy value and the water enthalpy value at the water inlet temperature are used to calculate the water replenishment heating energy; the water replenishment volume, the steam generator evaporation amount, the steam enthalpy value and the condensate enthalpy value are used to calculate the steam evaporation energy;

[0029] The water replenishment volume is calculated based on the relationship between the heating heat, the water replenishment temperature rising energy and the steam evaporation energy.

[0030] Furthermore, the lower limit liquid level setting module is also used for:

[0031] The difference between the maximum water volume of the furnace and the water replenishment volume is taken as the minimum water volume, and the lower limit liquid level of the furnace is determined according to the minimum water volume.

[0032] Furthermore, the water supply control module is also used for:

[0033] The minimum steam outlet temperature is set, and the water replenishment volume corresponding to the lower limit liquid level is divided into several parts according to the minimum steam outlet temperature;

[0034] Calculate the pump start time of the water supply interval according to the water replenishment volume, number of portions and water pump flow rate;

[0035] The pump stop time of the water supply interval is calculated according to the number of portions, the heating power, the condensate enthalpy value, the water inlet temperature enthalpy value and the pump start time of the water supply interval;

[0036] The water pump is controlled to intermittently supply water to the furnace according to the number of portions, the pump start time and the pump stop time.

[0037] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the water supply control method for the steam generator as described above.

[0038] The present invention calculates the water replenishment volume according to the relationship between the heating heat, the water replenishment temperature rising energy and the steam evaporation energy, and sets the lower limit liquid level according to the water replenishment volume. When the water in the furnace core drops to the lower limit liquid level and the water pump starts to control the intermittent water supply to the furnace core, the steam outlet temperature can be made not lower than the preset minimum temperature, and the steam pressure and temperature change accordingly, thereby effectively ensuring that the steam outlet pressure is not lower than the minimum pressure, and further effectively making the steam pressure fluctuate within the required range, and improving the stability of the outlet steam pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a flow chart of a water supply control method for a steam generator provided by an embodiment of the present invention;

[0040] Figure 2 is a structural schematic diagram of a steam generator provided by an embodiment of the present invention;

[0041] Figure 3 It is a structural schematic diagram of a water supply control device for a steam generator provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] See also Figure 1 , an embodiment of the present invention provides a water supply control method for a steam generator, comprising:

[0046] S1. Calculate the water replenishment volume of the steam generator according to the relationship between the heating heat of the steam generator, the water replenishment heating energy and the steam evaporation energy;

[0047] See also Figure 2 The steam generator can be composed of a closed furnace, a water pump, an electric heating tube assembly, a control system, a safety valve, a door handle, a steam outlet, a pressure gauge, and a furnace liquid level window. Its working principle is as follows: the electric heating tube is immersed in the water of the furnace, and steam is generated by heating the water in the furnace. The stop valve on the steam outlet pipeline at the top of the furnace is controlled to open, and the generated steam is transported to the steam equipment through the pipeline. The steam generated by the furnace can be used in the manufacturing industry or industry, such as for sterilizing food or medicine. The steam forms a certain steam pressure at the outlet of the steam generator. If the steam pressure fluctuates too much, the corresponding steam temperature will inevitably fluctuate, which will affect the actual sterilization effect.

[0048] In an embodiment of the present invention, a relationship between the heating heat of the steam generator, the feed water heating energy and the steam evaporation energy is: the heating heat of the steam generator ≥ the feed water heating energy + the energy required for the steam evaporation.

[0049] Optionally, the make-up water volume is used to calculate one or more parameters among these parameters, and the value of the make-up water volume can be determined according to the relational expression and other data of the steam generator.

[0050] S2. Set the lower limit liquid level of the steam generator according to the water replenishment volume;

[0051] In the embodiment of the present invention, the water replenishment volume is the volume of water replenishment required for the furnace of the steam generator. According to the known furnace volume, the lower limit liquid level can be determined according to the water replenishment volume. For example, if the furnace volume is 5L and the water replenishment volume is 2L, the lower limit liquid level is set to the liquid level where the furnace volume is 5-2=3L.

[0052] In the embodiment of the present invention, the furnace also includes an upper limit liquid level and an alarm liquid level, and the upper limit liquid level and the alarm liquid level are not adjusted in the embodiment of the present invention.

[0053] S3. When the liquid level in the furnace of the steam generator drops to the lower limit liquid level, the water pump is controlled to intermittently supply water to the furnace according to the water replenishment volume until the liquid level in the furnace reaches the preset upper limit liquid level of the furnace.

[0054] Optionally, the embodiment of the present invention adds a relay to the control circuit of the water pump, and sets the water supply program to electric water supply according to the relay, so that the water pump can be controlled to intermittently supply water to the furnace according to the replenishment volume. In a specific embodiment, when the water level in the furnace reaches the set lower limit liquid level, the water supply program is triggered. Taking the steam generator with an evaporation capacity of 60kg / h as an example, the pump is set to start running for 5s and stop for 3s, and water is supplied to the set upper limit liquid level in such an intermittent cycle, so as to control the steam pressure formed by the steam generator to fluctuate within the preset threshold range, thereby improving the stability of the steam pressure. Steam generators with other evaporation capacities can achieve the best effect by debugging parameters.

[0055] In one embodiment, the relationship between the heating heat of the steam generator, the water replenishment heating energy and the steam evaporation energy is:

[0056] The heating heat of the steam generator ≥ the energy required for water heating + the energy required for steam evaporation.

[0057] In an embodiment of the present invention, the heating heat of the steam generator is expressed as P*(V / Q), the water replenishment heating energy is expressed as V*(h2”-h0), and the energy required for steam evaporation is expressed as (V / Q)*Q1*(h2'-h2”).

[0058] Wherein, P is the heating power of the steam generator, V is the make-up water volume, Q is the water pump flow rate, h2' is the steam enthalpy value at the set minimum outlet steam temperature, h2" is the condensed water enthalpy value corresponding to the set minimum outlet steam temperature, h0 is the enthalpy value corresponding to the inlet water temperature, and Q1 is the evaporation capacity of the steam generator.

[0059] In one embodiment, the water replenishment volume of the steam generator is calculated based on the relationship between the heating heat of the steam generator, the water replenishment heating energy, and the steam evaporation energy, including:

[0060] Obtain the heating power of the steam generator, water pump flow, enthalpy value of water inlet temperature, evaporation amount of the steam generator, steam enthalpy value at the lowest outlet steam temperature, and condensate enthalpy value; among them, the steam enthalpy value and condensate enthalpy value at the lowest outlet steam temperature can be obtained by checking the "Saturated Steam Pressure and Enthalpy Value Correspondence Table".

[0061] The heating power, water pump flow and water supply volume are used to calculate the heating heat of the steam generator; the water supply volume, condensate enthalpy value and water enthalpy value at the inlet water temperature are used to calculate the water supply heating energy; the water supply volume, steam generator evaporation, steam enthalpy value and condensate enthalpy value are used to calculate the steam evaporation energy;

[0062] The water replenishment volume is calculated based on the relationship between the heating heat, the water replenishment temperature rise energy and the steam evaporation energy.

[0063] In the embodiment of the present invention, the minimum outlet steam temperature T2 is set to 148°C, the corresponding steam pressure is 0.45MPa, the steam enthalpy value h2' is 2743.8KJ / kg, the condensed water enthalpy value h2" is 611.39KJ / kg, and P is the heating power of the steam generator, 48Kw (1Kw=3600KJ / h) (taking a 60Kg / h evaporation boiler as an example).

[0064] According to the relationship expression that the heating heat of the steam generator ≥ the make-up water heating energy + the energy required for the steam evaporation, the heating power of the steam generator, the water pump flow, the enthalpy value of the inlet temperature, the evaporation capacity of the steam generator, the steam enthalpy value at the lowest temperature of the outlet steam, and the enthalpy value of the condensate are substituted into the above expression, and it can be calculated that the make-up water volume should be less than 6.2L, so that a reasonable lower limit liquid level can be determined based on the make-up water volume.

[0065] The embodiment of the present invention calculates the make-up water volume based on the minimum steam outlet temperature and the relationship between the heating heat, the make-up water heating energy and the steam evaporation energy, and sets the lower limit liquid level according to the make-up water volume. When the water in the furnace drops to the lower limit liquid level and the water pump starts to control the intermittent water supply to the furnace, the steam outlet temperature can be made not lower than the minimum temperature, and the steam pressure and temperature change accordingly, thereby effectively ensuring that the steam outlet pressure is not lower than the minimum pressure, and further effectively making the steam pressure fluctuate within the required range, thereby improving the stability of the outlet steam pressure.

[0066] In one embodiment, setting the lower limit liquid level of the steam generator according to the water replenishment volume includes:

[0067] The difference between the maximum water volume of the furnace and the replenishing water volume is taken as the minimum water volume, and the lower limit liquid level of the furnace is determined according to the minimum water volume.

[0068] In one embodiment, controlling the water pump to intermittently supply water to the furnace according to the water replenishment volume includes:

[0069] Set the minimum steam outlet temperature, and divide the water replenishment volume corresponding to the lower limit liquid level into several parts according to the minimum steam outlet temperature;

[0070] In an embodiment of the present invention, the minimum temperature of the steam outlet can be set according to actual needs. For example, in a specific embodiment, the minimum temperature of the steam outlet is set to 148°C. The premise of the embodiment of the present invention that the water replenishment volume is divided into several portions is to ensure that when the water is intermittently added with these portions of water replenishment volume, the difference between the steam outlet temperature and the set steam outlet minimum temperature does not exceed the preset value. For example, the embodiment of the present invention divides the original 5L water replenishment volume into 5 portions, each of which is 1L, and intermittently injects each portion of water replenishment volume into the furnace, and the water pump is started for 6s. At this time, the minimum temperature of the steam outlet is 147°C, and the difference with the set steam outlet minimum temperature is only 1°C, which is within an acceptable range, that is, the above method of the embodiment of the present invention can effectively improve the stability of the temperature and pressure of the steam outlet.

[0071] Calculate the pump start time for the water filling interval based on the water filling volume, number of portions and water pump flow rate;

[0072] In an embodiment of the present invention, the expression of the pump start time is:

[0073] t3=V / 5Q;

[0074] Among them, t3 is the pump start time, V is the water replenishment volume, and Q is the pump flow rate.

[0075] The pump stop time of the water supply interval is calculated according to the number of portions, heating power, condensate enthalpy value, water inlet temperature enthalpy value and pump start time of the water supply interval;

[0076] In the embodiment of the present invention, the expression of the pump stop time is:

[0077] t4=5P / V(h2″-h0)-t3;

[0078] Among them, t4 is the pump stop time.

[0079] The water pump is controlled to intermittently supply water to the furnace according to the number of portions, pump start time and pump stop time.

[0080] In the embodiment of the present invention, the process of controlling the water pump to intermittently supply water is specifically as follows:

[0081] Each water replenishment volume is injected at a time, and the pump start time and pump stop time are controlled in sequence. After the pump stop time is over, the next water replenishment volume is injected into the furnace in the same way until all the water replenishment volumes are injected.

[0082] In the embodiment of the present invention, the law of conservation of energy is used to calculate the total energy of the furnace after the cold water enters the furnace, that is, the sum of the heat of the cold water and the heat of the water in the original furnace is the total energy of the furnace.

[0083] The implementation of the embodiments of the present invention has the following beneficial effects:

[0084] The embodiment of the present invention calculates the water replenishment volume according to the relationship between the heating heat, the water replenishment temperature rising energy and the steam evaporation energy, and sets the lower limit liquid level according to the water replenishment volume. When the water in the furnace core drops to the lower limit liquid level and the water pump starts to control the water to add water to the furnace core, the steam outlet temperature can be made not lower than the preset minimum temperature, and the steam pressure and temperature change accordingly, thereby effectively ensuring that the steam outlet pressure is not lower than the minimum pressure, and further effectively making the steam pressure fluctuate within the required range, and improving the stability of the outlet steam pressure.

[0085] See also Figure 3 Based on the same inventive concept as the above embodiment, an embodiment of the present invention provides a water supply control device for a steam generator, comprising:

[0086] The water replenishment volume calculation module 10 is used to calculate the water replenishment volume of the steam generator according to the relationship between the heating heat of the steam generator, the water replenishment temperature rise energy and the steam evaporation energy;

[0087] A lower limit liquid level setting module 20, used to set the lower limit liquid level of the steam generator according to the water replenishment volume;

[0088] The water supply control module 30 is used to control the water pump to intermittently supply water to the furnace according to the water replenishment volume when the liquid level of the furnace of the steam generator drops to the lower limit liquid level, until the liquid level of the furnace reaches the preset upper limit liquid level of the furnace.

[0089] In one embodiment, the relationship between the heating heat of the steam generator, the water replenishment heating energy and the steam evaporation energy is:

[0090] The heating heat of the steam generator ≥ the energy required for water heating + the energy required for steam evaporation.

[0091] In one embodiment, the root water replenishment volume calculation module 10 is further used for:

[0092] Obtain the heating power of the steam generator, the water pump flow, the enthalpy value of the water inlet temperature, the evaporation amount of the steam generator, the steam enthalpy value at the lowest outlet steam temperature, and the enthalpy value of the condensate;

[0093] The heating power, water pump flow and water supply volume are used to calculate the heating heat of the steam generator; the water supply volume, condensate enthalpy value and water enthalpy value at the inlet water temperature are used to calculate the water supply heating energy; the water supply volume, steam generator evaporation, steam enthalpy value and condensate enthalpy value are used to calculate the steam evaporation energy;

[0094] The water replenishment volume is calculated based on the relationship between the heating heat, the water replenishment temperature rise energy and the steam evaporation energy.

[0095] In one embodiment, the lower limit liquid level setting module 20 is further used to:

[0096] The difference between the maximum water volume of the furnace and the replenishing water volume is taken as the minimum water volume, and the lower limit liquid level of the furnace is determined according to the minimum water volume.

[0097] In one embodiment, the water supply control module 30 is further used to:

[0098] Set the minimum steam outlet temperature, and divide the water replenishment volume corresponding to the lower limit liquid level into several parts according to the minimum steam outlet temperature;

[0099] Calculate the pump start time for the water filling interval based on the water filling volume, number of portions and water pump flow rate;

[0100] The pump stop time of the water supply interval is calculated according to the number of portions, heating power, condensate enthalpy value, water inlet temperature enthalpy value and pump start time of the water supply interval;

[0101] The water pump is controlled to intermittently supply water to the furnace according to the number of portions, pump start time and pump stop time.

[0102] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the water supply control method for the steam generator as described above.

[0103] The above are preferred embodiments of the present invention. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A water supply control method for a steam generator, It is characterized in that include: The water replenishment volume of the steam generator is calculated according to the relationship between the heating heat of the steam generator, the water replenishment temperature rise energy and the steam evaporation energy; the water replenishment volume of the steam generator is calculated according to the relationship between the heating heat of the steam generator, the water replenishment temperature rise energy and the steam evaporation energy, including: obtaining the heating power of the steam generator, the water pump flow, the water inlet temperature enthalpy value, the steam generator evaporation amount, the steam enthalpy value and the condensate enthalpy value at the lowest outlet steam temperature; the heating power, the water pump flow and the water replenishment volume are used to calculate the heating heat of the steam generator; the water replenishment volume and the condensate enthalpy value and the water inlet temperature enthalpy value are used to calculate the water replenishment temperature rise energy; the water replenishment volume, the steam generator evaporation amount, the steam enthalpy value and the condensate enthalpy value are used to calculate the steam evaporation energy; the water replenishment volume is calculated according to the relationship between the heating heat of the steam generator, the water replenishment temperature rise energy and the steam evaporation energy; Setting the lower limit liquid level of the steam generator according to the water replenishment volume; When the liquid level of the furnace of the steam generator drops to the lower limit liquid level, the water pump is controlled according to the water replenishment volume to intermittently add water to the furnace until the liquid level of the furnace reaches the preset upper limit liquid level of the furnace.

2. The water supply control method for a steam generator according to claim 1, It is characterized in that The relationship between the heating heat, water supply heating energy and steam evaporation energy of the steam generator is: The heating heat of the steam generator ≥ the water heating energy + the steam evaporation energy.

3. The water supply control method for a steam generator according to claim 1, It is characterized in that The step of setting the lower limit liquid level of the steam generator according to the water replenishment volume comprises: The difference between the maximum water volume of the furnace and the water replenishment volume is taken as the minimum water volume, and the lower limit liquid level of the furnace is determined according to the minimum water volume.

4. The water supply control method for a steam generator according to claim 1, It is characterized in that The step of controlling the water pump to intermittently supply water to the furnace according to the water replenishment volume comprises: The minimum steam outlet temperature is set, and the water replenishment volume corresponding to the lower limit liquid level is divided into several parts according to the minimum steam outlet temperature; Calculate the pump start time of the water supply interval according to the water replenishment volume, number of portions and water pump flow rate; The pump stop time of the water supply interval is calculated according to the number of portions, the heating power, the condensate enthalpy value, the water inlet temperature enthalpy value and the pump start time of the water supply interval; The water pump is controlled to intermittently supply water to the furnace according to the number of portions, the pump start time and the pump stop time.

5. A water supply control device for a steam generator, It is characterized in that include: A water replenishment volume calculation module is used to calculate the water replenishment volume of the steam generator according to the relationship between the heating heat of the steam generator, the water replenishment temperature rise energy and the steam evaporation energy; specifically used to: obtain the heating power of the steam generator, the water pump flow, the water inlet temperature enthalpy value, the steam generator evaporation amount, the steam enthalpy value and the condensate enthalpy value at the lowest outlet steam temperature; the heating power, the water pump flow and the water replenishment volume are used to calculate the heating heat of the steam generator; the water replenishment volume and the condensate enthalpy value and the water inlet temperature enthalpy value are used to calculate the water replenishment temperature rise energy; the water replenishment volume, the steam generator evaporation amount, the steam enthalpy value and the condensate enthalpy value are used to calculate the steam evaporation energy; the water replenishment volume is calculated according to the relationship between the heating heat of the steam generator, the water replenishment temperature rise energy and the steam evaporation energy; A lower limit liquid level setting module, used to set the lower limit liquid level of the steam generator according to the water replenishment volume; The water supply control module is used to control the water pump to intermittently supply water to the furnace according to the water replenishment volume when the liquid level of the furnace of the steam generator drops to the lower limit liquid level, until the liquid level of the furnace reaches the preset upper limit liquid level of the furnace.

6. The water supply control device for a steam generator according to claim 5, It is characterized in that The lower limit liquid level setting module is also used for: The difference between the maximum water volume of the furnace and the water replenishment volume is taken as the minimum water volume, and the lower limit liquid level of the furnace is determined according to the minimum water volume.

7. The water supply control device for a steam generator according to claim 5, It is characterized in that The water supply control module is also used for: The minimum steam outlet temperature is set, and the water replenishment volume corresponding to the lower limit liquid level is divided into several parts according to the minimum steam outlet temperature; Calculate the pump start time of the water supply interval according to the water replenishment volume, number of portions and water pump flow rate; The pump stop time of the water supply interval is calculated according to the number of portions, the heating power, the condensate enthalpy value, the water inlet temperature enthalpy value and the pump start time of the water supply interval; The water pump is controlled to intermittently supply water to the furnace according to the number of portions, the pump start time and the pump stop time.

8. A computer-readable storage medium, It is characterized in that The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the water supply control method for the steam generator according to any one of claims 1 to 4.

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