A desulfurization wastewater discharge control method, system, device and storage medium

Abstract

The application discloses a desulfurization wastewater discharge control method, system, device and storage medium, which comprises the following steps: determining the first desulfurization wastewater discharge P1 of a limestone-gypsum wet desulfurization system based on the chlorine ion balance of desulfurization slurry; determining the second desulfurization wastewater discharge P2 of the limestone-gypsum wet desulfurization system based on the magnesium ion balance of the desulfurization slurry; when P1>P2, the limestone-gypsum wet desulfurization system discharges according to the first desulfurization wastewater discharge P1; and when P1P2, the limestone-gypsum wet desulfurization system discharges according to the second desulfurization wastewater discharge P2. The method, system, device and storage medium can control the desulfurization wastewater discharge of the limestone-gypsum wet desulfurization system more accurately.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of flue gas wet desulfurization in coal-fired power plants, and relates to a desulfurization wastewater discharge amount control method, system, device and storage medium. BACKGROUND

[0002] The limestone-gypsum flue gas desulfurization process is a widely used flue gas desulfurization process at home and abroad. This process will produce a certain amount of wastewater while removing sulfur dioxide in flue gas to form gypsum. The main purpose of discharging desulfurization wastewater is to control the concentration of soluble ions (chloride ions, magnesium ions, etc.) in the slurry within a certain range to ensure normal desulfurization reaction and excellent gypsum quality. At the same time, the desulfurization wastewater also contains a large amount of other pollutants. Compared with GB8978-1996 "Integrated Wastewater Discharge Standard", the exceeding standard items are pH value, suspended solids, mercury, copper, lead, nickel, zinc and other heavy metals, as well as arsenic, fluorine and other non-metallic elements. In addition, the contents of calcium, magnesium, chloride, sulfate, sulfite, carbonate, aluminum and iron are also high. Among them, mercury, arsenic, lead and nickel are strictly limited in our country, which are the first class of pollutants that have long-term adverse effects on human body and environment. Most of the environmental impact assessments and pollution discharge permits of thermal power plants clearly require that the desulfurization wastewater be reused for production after treatment, and it is not allowed to be discharged externally. However, due to its high salt, high hardness and high turbidity, and strong corrosiveness and pollution, most power plants cannot handle it. With the increasing control of the state on power plant wastewater, desulfurization wastewater is the most difficult part of coal-fired power plant wastewater to treat. Therefore, how to efficiently dispose of desulfurization wastewater to meet the requirements of the environmental impact assessment and pollution discharge permit of the power plant is a major challenge faced by coal-fired power plants. When the desulfurization wastewater treatment system is modified, the wastewater quantity should be determined first, and then the process route is selected according to the wastewater quantity. Currently, there are two methods to obtain the desulfurization wastewater quantity. Method one is to obtain the desulfurization wastewater quantity by water balance test. The water quantity obtained by the test is the running condition of a time period or a period of time, which cannot predict the possible change of wastewater quantity after the working condition changes. Method two is to accurately control the wastewater discharge quantity by online detection of the chloride ion content in the flue gas, desulfurization makeup water and desulfurization wastewater. For example, the limestone / lime wet desulfurization wastewater discharge quantity real-time accurate control system disclosed in Chinese patent application publication No. CN107450614A and the desulfurization wastewater Cl - online detection and intelligent discharge control system disclosed in Chinese utility model patent publication No. CN215609449U. This method only controls the desulfurization wastewater discharge quantity by chloride ion concentration in real time, without considering the need for discharge of other soluble ions, so the control accuracy is poor. SUMMARY

[0003] The present application aims to overcome the above-mentioned shortcomings of the prior art, and provides a desulfurization wastewater discharge control method, system, device and storage medium, which can more accurately control the desulfurization wastewater discharge of a limestone-gypsum wet desulfurization system.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] In one aspect of the present application, the present application provides a desulfurization wastewater discharge control method, which comprises:

[0006] Based on the chlorine ion balance of the desulfurization slurry, the first desulfurization wastewater discharge P1 of the limestone-gypsum wet desulfurization system is determined;

[0007] Based on the magnesium ion balance of the desulfurization slurry, the second desulfurization wastewater discharge P2 of the limestone-gypsum wet desulfurization system is determined;

[0008] When P1>P2, the limestone-gypsum wet desulfurization system discharges according to the first desulfurization wastewater discharge P1; when P1

[0009] The first desulfurization wastewater discharge P1=(M1-N1)×10 3 / H1, wherein M1 is the amount of chlorine ions brought into the desulfurization slurry, N1 is the amount of chlorine ions taken out of the gypsum external water, and H1 is the chlorine ion discharge concentration of the desulfurization wastewater.

[0010] The amount of chlorine ions brought into the desulfurization slurry M1=B×γ×η×τ×10 3 +W×α×10 -3 , B is the consumption of boiler coal, γ is the mass percentage of chlorine elements in coal, η is the chlorine element precipitation rate after coal combustion, τ is the proportion of chlorine elements transferred into the desulfurization slurry, W is the desulfurization process water consumption, and α is the chlorine element content in the desulfurization process water.

[0011] The amount of chlorine ions taken out of the gypsum external water N1=(G×δ / ρ)×H11×10 -3 , G is the gypsum production of the desulfurization system, δ is the water content of the gypsum external water, ρ is the density of the desulfurization wastewater, and H11 is the chlorine ion concentration in the gypsum external water.

[0012] The second desulfurization wastewater discharge P2=(M2-N2)×10 3 / H2, M2 is the amount of magnesium ions brought into the desulfurization slurry, N2 is the amount of magnesium ions taken out of the gypsum external water, and H2 is the magnesium ion discharge concentration of the desulfurization wastewater.

[0013] The amount of magnesium ions brought into the desulfurization slurry M2=L×β×ε+W×ζ×10 -3L is the limestone consumption of the desulfurization system, W is the water supplement of the desulfurization process, beta is the magnesium ion content in limestone, epsilon is the dissolution coefficient of magnesium carbonate, and zeta is the magnesium element content in the water of the desulfurization process.

[0014] The magnesium ion carrying amount N2 in the gypsum external water is (G*delta / p)*H22*10 -3 H22 is the magnesium ion concentration in the gypsum external water, G is the gypsum output of the desulfurization system, delta is the water content of the gypsum external water, and p is the density of the desulfurization wastewater.

[0015] In the second aspect of the present application, a desulfurization wastewater discharge control system is provided, which comprises:

[0016] The first calculation module is used for determining the first desulfurization wastewater discharge P1 of the limestone-gypsum wet desulfurization system based on the chlorine ion balance of the desulfurization slurry.

[0017] The second calculation module is used for determining the second desulfurization wastewater discharge P2 of the limestone-gypsum wet desulfurization system based on the magnesium ion balance of the desulfurization slurry.

[0018] The control module is used for discharging the desulfurization wastewater according to the first desulfurization wastewater discharge P1 when P1>P2, and discharging the desulfurization wastewater according to the second desulfurization wastewater discharge P2 when P1

[0019] In the third aspect of the present application, a computer device is provided, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the desulfurization wastewater discharge control method when executing the computer program.

[0020] In the fourth aspect of the present application, a computer readable storage medium is provided, which stores a computer program, and the computer program implements the steps of the desulfurization wastewater discharge control method when executed by a processor.

[0021] The present application has the following beneficial effects:

[0022] The desulfurization wastewater discharge control method, system, device and storage medium provided by the present application can avoid the problem of inaccurate control caused by considering single chlorine ion concentration, and have the advantages of simple operation, convenience and high accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification. The drawings

[0024] Figure 1 is a flow chart of the present application.

[0025] Figure 2 is a system diagram of the present application. DETAILED DESCRIPTION

[0026] In order to make the technical personnel of the present application better understand the present application, the following will be combined with the drawings of 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 a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] The present application will be described in further detail below in conjunction with the accompanying drawings:

[0029] The main purpose of coal-fired power plant limestone-gypsum wet desulfurization wastewater discharge is to control the concentration of soluble ions in the slurry to ensure normal desulfurization reaction. Desulfurization wastewater is the most difficult part of the wastewater treatment in power plant, and the investment and wastewater treatment cost of wastewater treatment equipment are relatively high, so how to accurately determine the desulfurization wastewater discharge is an important work to control the related transformation project and reduce the treatment operation cost. At present, the desulfurization wastewater discharge is determined according to the concentration of chloride ions in the slurry, and this method does not comprehensively consider the soluble ions in the slurry.

[0030] Example one

[0031] Based on the above problems, referring to Figure 1 The limestone-gypsum wet desulfurization wastewater discharge control method provided by the present application comprises:

[0032] 1) Based on the chlorine ion balance of the desulfurization slurry, the first desulfurization wastewater discharge amount P1 of the limestone-gypsum wet desulfurization system is determined;

[0033] 2) Based on the magnesium ion balance of the desulfurization slurry, the second desulfurization wastewater discharge amount P2 of the limestone-gypsum wet desulfurization system is determined;

[0034] 3) When P1>P2, the limestone-gypsum wet desulfurization system discharges according to the first desulfurization wastewater discharge amount P1; when P1

[0035] 1, wherein the first desulfurization wastewater discharge amount P1=(M1-N1)×10 3 / H1, M1 is the amount of chlorine ions brought into the desulfurization slurry, N1 is the amount of chlorine ions brought out of the gypsum external water, and H1 is the chlorine ion discharge concentration of the desulfurization wastewater;

[0036] The second desulfurization wastewater discharge amount P2=(M2-N2)×10 3 / H2, M2 is the amount of magnesium ions brought into the desulfurization slurry, N2 is the amount of magnesium ions brought out of the gypsum external water, and H2 is the magnesium ion discharge concentration of the desulfurization wastewater.

[0037] The amount of chlorine ions brought into the desulfurization slurry M1=B×γ×η×τ×10 3 +W×α×10 -3 , B is the consumption of boiler coal, unit: t / h; γ is the mass percentage of chlorine element in coal, unit: %; η is the chlorine element precipitation rate after coal combustion, unit: %, η=97%; τ is the proportion of chlorine element transferred into the desulfurization slurry, unit: %, τ=93%; W is the desulfurization process water consumption, unit: m 3 / h; α is the chlorine element content in the desulfurization process water, unit: mg / L. The amount of chlorine ions brought out of the gypsum external water N1=(G×δ / ρ)×H11×10 -3 , G is the gypsum production of the desulfurization system, unit: kg / h; δ is the water content of the gypsum external water, unit: %; ρ is the density of the desulfurization wastewater, unit: kg / m 3 ; H11 is the chlorine ion concentration in the gypsum external water, unit: mg / L.

[0038] The amount of magnesium ions brought into the desulfurization slurry M2=L×β×ε+W×ζ×10 -3 , L is the limestone consumption of the desulfurization system, unit kg / h; β is the magnesium ion content in limestone, unit %; ε is the dissolution coefficient of magnesium carbonate (MgCO3), taking the value of 75%; ζ is the magnesium element content in the desulfurization process water, unit: mg / L. The amount of magnesium ions brought out of the gypsum external water N2=(G×δ / ρ)×H22×10 -3H22 is the magnesium ion concentration in the outer water of gypsum, unit: mg / L.

[0039] Embodiment two

[0040] Reference Figure 2 The desulfurization wastewater discharge control system comprises:

[0041] The first calculation module 1 is used for determining the first desulfurization wastewater discharge P1 of the limestone-gypsum wet desulfurization system based on the chlorine ion balance of the desulfurization slurry.

[0042] The second calculation module 2 is used for determining the second desulfurization wastewater discharge P2 of the limestone-gypsum wet desulfurization system based on the magnesium ion balance of the desulfurization slurry.

[0043] The control module 3 is used for discharging the limestone-gypsum wet desulfurization system according to the first desulfurization wastewater discharge P1 when P1>P2, and discharging the limestone-gypsum wet desulfurization system according to the second desulfurization wastewater discharge P2 when P1

[0044] Embodiment three

[0045] This embodiment takes the desulfurization system matched with the rated load 1000 MW coal-fired unit under different operating load conditions as an example, and uses the present application to calculate the desulfurization wastewater discharge under different conditions, wherein the initial conditions are shown in Table 1:

[0046] Table 1

[0047] Item Symbol Unit Working condition 1 Working condition 2 Working condition 3 Unit load MW 750 850 1000 Coal consumption B t / h 280 316 374 Chlorine content in coal γ ％ 0.05 0.05 0.05 Chlorine element precipitation rate η ％ 97 97 97 Chlorine element transfer into slurry ratio τ ％ 93 93 93 Sulfur content of coal into furnace S ％ 0.8 0.6 0.7 Desulfurization efficiency T ％ 99 99 99 Calcium carbonate content in limestone Ca ％ 92.9 89.3 90.7 Magnesium carbonate content in limestone Mg ％ 1.1 1.5 2.1 Magnesium carbonate dissolution coefficient ε ％ 75 75 75 Desulfurization process water replenishment amount W m 3 / h]]> 207 237 280 Chlorine content in desulfurization process water α mg / L 120 120 120 Magnesium content in desulfurization process water ζ mg / L 55 55 55 Gypsum external water content δ ％ 13 12 10 Desulfurization wastewater density ρ kg / m 3 ]] 1070 1100 1080 Chloride ion concentration in desulfurization wastewater H1 mg / L 20000 20000 20000 Magnesium ion concentration in desulfurization wastewater H2 mg / L 12500 12500 12500 Chloride ion concentration in gypsum external water H11 mg / L 400 400 400 Magnesium ion concentration in gypsum external water H22 mg / L 250 250 250

[0048] In Table 1, the unit of the unit load is megawatt hour; the unit of the coal consumption is ton / hour; the unit of the desulfurization process water replenishment is cubic meter / hour; the unit of the chlorine content of the desulfurization process water is milligram / liter; the unit of the magnesium content of the desulfurization process water is milligram / liter; the unit of the desulfurization wastewater density is kilogram / cubic meter; the unit of the chlorine ion concentration of the desulfurization wastewater is milligram / liter; and the unit of the magnesium ion concentration of the desulfurization wastewater is milligram / liter.

[0049] The calculation results are shown in Table 2:

[0050] Table 2

[0051] Item Symbol Unit Working condition 1 Working condition 2 Working condition 3 Unit load MW 750 850 1000 Limestone consumption L kg / h 7535 6635 9020 Gypsum production G kg / h 11580 10106 13494 Chloride ion carrying-in amount M1 kg / h 151 171 202 Chloride ion carrying-out amount N1 kg / h 0.56 0.44 0.50 Magnesium ion carrying-in amount M2 kg / h 74 88 157 Magnesium ion carrying-out amount N2 kg / h 0.35 0.28 0.31 Chlorine balance wastewater discharge amount P1 m 3 / h]]> 7.53 8.53 10.09 Magnesium balance wastewater discharge amount P2 m 3 / h]]> 5.86 6.99 12.57 Final desulfurization wastewater discharge amount P m 3 / h]]> 7.53 8.53 12.57

[0052] In Table 2, the unit of the limestone consumption, the gypsum yield, the chlorine ion carrying-in amount, the chlorine ion carrying-out amount, the magnesium ion carrying-in amount and the magnesium ion carrying-out amount is kilogram / hour; the unit of the chlorine balance wastewater discharge, the magnesium balance wastewater discharge and the final desulfurization wastewater discharge is cubic meter / hour; and the unit of the slurry chlorine ion concentration and the slurry magnesium ion concentration is mole / hour.

[0053] Embodiment Four

[0054] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the desulfurization wastewater discharge control method when executing the computer program. The memory can include an internal memory such as a high-speed random memory, and can also include a non-volatile memory such as at least one disk memory. The processor, network interface, and memory are connected to each other through an internal bus, which can be an industry standard architecture bus, a peripheral component interconnect standard bus, an extended industry standard architecture bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. The memory is used to store programs, and specifically, the programs can include program codes, and the program codes include computer operation instructions. The memory can include an internal memory and a non-volatile memory, and provide instructions and data to the processor.

[0055] Embodiment Five

[0056] A computer readable storage medium stores a computer program, and the computer program implements the steps of the desulfurization wastewater discharge control method when executed by a processor. Specifically, the computer readable storage medium includes but is not limited to, for example, a volatile memory and / or a non-volatile memory. The volatile memory can include a random access memory (RAM) and / or a cache memory, and the like. The non-volatile memory can include a read-only memory (ROM), a hard disk, a flash memory, an optical disc, a magnetic disc, and the like.

[0057] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0058] The present application is described with reference to flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the computer or other programmable data processing apparatus produce a device that implements the functions described in the flowcharts and / or block diagrams. Figure 1one or more processes and / or blocks Figure 1 an apparatus for performing the functions specified in the flowchart or multiple flows and / or blocks.

[0059] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the flowchart or multiple flows and / or blocks. Figure 1 one or more processes and / or blocks Figure 1 an apparatus for performing the functions specified in the flowchart or multiple flows and / or blocks.

[0060] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flowchart or multiple flows and / or blocks. Figure 1 one or more processes and / or blocks Figure 1 an apparatus for performing the functions specified in the flowchart or multiple flows and / or blocks.

[0061] Finally, it should be noted that the above-mentioned embodiments are merely used to illustrate the technical solutions of the present application, rather than limiting them. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A method for controlling the discharge of desulfurization wastewater, characterized in that, include: Based on the chloride ion balance of the desulfurization slurry, the first desulfurization wastewater discharge P1 of the limestone-gypsum wet desulfurization system was determined. Based on the magnesium ion balance of the desulfurization slurry, the second desulfurization wastewater discharge P2 of the limestone-gypsum wet desulfurization system was determined. When P1 > P2, the limestone-gypsum wet desulfurization system discharges wastewater according to the first desulfurization wastewater discharge volume P1; when P1 < P2, the limestone-gypsum wet desulfurization system discharges wastewater according to the second desulfurization wastewater discharge volume P2. The first desulfurization wastewater discharge volume P1 = (M1 - N1) × 10 3 / H1, where M1 is the amount of chloride ions introduced into the desulfurization slurry, N1 is the amount of chloride ions removed from the gypsum external water, and H1 is the chloride ion discharge concentration of the desulfurization wastewater; The amount of chloride ions introduced into the desulfurization slurry, M1 = B × γ × η × τ × 10 3 +W×α×10 -3 B is the boiler coal consumption, γ is the mass percentage of chlorine in the coal, η is the chlorine release rate after coal combustion, τ is the proportion of chlorine transferred into the desulfurization slurry, W is the desulfurization process makeup water, and α is the chlorine content in the desulfurization process water. The amount of chloride ions carried out by the gypsum in the external water is N1 = (G × δ / ρ) × H11 × 10 -3 G represents the gypsum production of the desulfurization system, δ represents the water content outside the gypsum, ρ represents the density of the desulfurization wastewater, and H11 represents the chloride ion concentration in the water outside the gypsum.

2. The method for controlling the discharge of desulfurization wastewater according to claim 1, characterized in that, The discharge volume of the second desulfurization wastewater is P2 = (M2 - N2) × 10 3 / H2, M2 is the amount of magnesium ions introduced into the desulfurization slurry, N2 is the amount of magnesium ions removed from the gypsum external water, and H2 is the concentration of magnesium ions discharged into the desulfurization wastewater.

3. The method for controlling the discharge of desulfurization wastewater according to claim 2, characterized in that, The amount of magnesium ions introduced into the desulfurization slurry, M2 = L × β × ε + W × ζ × 10 -3 L represents the limestone consumption of the desulfurization system, W represents the makeup water volume of the desulfurization process, β represents the magnesium ion content in the limestone, ε represents the solubility coefficient of magnesium carbonate, and ζ represents the magnesium content in the desulfurization process water.

4. The method for controlling the discharge of desulfurization wastewater according to claim 2, characterized in that, Magnesium ion carry-out amount N2 from gypsum water = (G × δ / ρ) × H22 × 10 -3 H22 is the magnesium ion concentration in the gypsum external water, G is the gypsum production of the desulfurization system, δ is the water content in the gypsum external water, and ρ is the density of the desulfurization wastewater.

5. A desulfurization wastewater discharge control system, characterized in that, include: The first calculation module (1) is used to determine the first desulfurization wastewater discharge P1 of the limestone-gypsum wet desulfurization system based on the chloride ion balance of the desulfurization slurry. The second calculation module (2) is used to determine the second desulfurization wastewater discharge P2 of the limestone-gypsum wet desulfurization system based on the magnesium ion balance of the desulfurization slurry. The control module (3) is used to discharge the limestone-gypsum wet desulfurization system according to the first desulfurization wastewater discharge amount P1 when P1 > P2; and to discharge the limestone-gypsum wet desulfurization system according to the second desulfurization wastewater discharge amount P2 when P1 < P2. The first desulfurization wastewater discharge volume P1 = (M1 - N1) × 10 3 / H1, where M1 is the amount of chloride ions introduced into the desulfurization slurry, N1 is the amount of chloride ions removed from the gypsum external water, and H1 is the chloride ion discharge concentration of the desulfurization wastewater; The amount of chloride ions introduced into the desulfurization slurry, M1 = B × γ × η × τ × 10 3 +W×α×10 -3 B is the boiler coal consumption, γ is the mass percentage of chlorine in the coal, η is the chlorine release rate after coal combustion, τ is the proportion of chlorine transferred into the desulfurization slurry, W is the desulfurization process makeup water, and α is the chlorine content in the desulfurization process water. The amount of chloride ions carried out by the gypsum in the external water is N1 = (G × δ / ρ) × H11 × 10 -3 G represents the gypsum production of the desulfurization system, δ represents the water content outside the gypsum, ρ represents the density of the desulfurization wastewater, and H11 represents the chloride ion concentration in the water outside the gypsum.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the desulfurization wastewater discharge control method as described in any one of claims 1 to 4.

7. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the desulfurization wastewater discharge control method as described in any one of claims 1 to 4.

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