Environment-friendly purification boiler for power plant

Abstract

The application provides an environment-friendly purification boiler for power plants, and relates to the technical field of purification boilers, which comprises a base, a boiler body, a spray tower and a circulating water tank fixedly connected to the base, an automatic smoke suction module connected to the boiler body, a gas outlet of the automatic smoke suction module in communication with a gas inlet of the spray tower, an automatic spraying module connected to the spray tower, a water inlet of the automatic spraying module in communication with the circulating water tank, a water outlet of the spray tower in communication with a water inlet of the circulating water tank through a circulating pipe, an automatic stirring module arranged in the circulating water tank, and an automatic dosing module connected to the outside of the circulating water tank. The automatic smoke suction module, the automatic dosing module, the automatic stirring module and the automatic spraying module are arranged, so that the boiler does not need a smoke bypass, has high automation, good purification effect, meets the requirements of environmental protection and sustainable development, and liberates a large amount of manpower. The coal block crushing device is arranged, so that the labor cost and the investment cost are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler, in particular to an environment-friendly purification boiler for power plant. BACKGROUND

[0002] Power plant, also known as power station, is a factory that converts various primary energy in nature into electric energy (secondary energy). In the late 19th century, with the growth of electricity demand, people began to propose the idea of establishing an electricity production center. With the development of electric machine manufacturing technology, the expansion of electric energy application range, and the rapid growth of production needs for electricity, power plants have emerged as the times require. There are various ways to generate electricity in power plants today: those that rely on fire power are called thermal power plants, those that rely on water power are called hydroelectric power plants, and some that rely on solar energy (photovoltaic) and wind power and tidal power generation. While thermal power plants, also known as thermal power plants, use combustible materials (such as coal) as fuel to produce electric energy. Its basic production process is: when the fuel is burned, it heats the water to generate steam, converting the chemical energy of the fuel into heat energy. The steam pressure drives the steam turbine to rotate, converting the heat energy into mechanical energy. Then the steam turbine drives the generator to rotate, converting the mechanical energy into electrical energy. With the rapid development of modern economy, power plant boilers are increasing.

[0003] The existing power plant boiler has the following problems:

[0004] 1. Currently, when the thermal power plant purifies the boiler flue gas, it needs to spray the flue gas with a purification liquid to decompose the harmful substances in the flue gas. The purification liquid is usually composed of lime, water and other liquids. The lime and water in the existing flue gas purification device are usually mixed and then transported to the boiler for purification. When the transportation distance is long or the lime and water are mixed for a long time before being transported to the boiler, the purification liquid is prone to sedimentation, resulting in uneven mixing and poor purification effect.

[0005] 2. Currently, most power plant boilers need to crush the coal before putting the coal powder into the boiler for full combustion. In the existing technology, the crushed coal is manually transported to the boiler, increasing the labor cost. SUMMARY

[0006] The present application provides an environment-friendly purification boiler for power plant to solve at least one of the above technical problems.

[0007] In order to solve the above technical problems, the application discloses an environment-friendly purification boiler for power plants, which comprises a base, a boiler body, a spray tower and a circulating water tank fixedly connected to the base, an automatic smoke suction module connected to the boiler body, a gas outlet of the automatic smoke suction module in communication with a gas inlet of the spray tower, an automatic spray module connected to the spray tower, a water inlet of the automatic spray module in communication with the circulating water tank, a water outlet of the spray tower in communication with a water inlet of the circulating water tank through a circulating pipe, an automatic stirring module arranged in the circulating water tank, and an automatic dosing module connected to the circulating water tank.

[0008] Preferably, the automatic smoke suction module comprises a flue, a smoke suction hood connected to one end of the flue, the smoke suction hood extending into the boiler body, a filter box connected to the other end of the flue, a filter screen arranged in the filter box, a gas outlet of the filter box in communication with the gas inlet of the spray tower through a gas conveying pipe, and a gas suction pump installed on the flue.

[0009] Preferably, the automatic spray module comprises a liquid suction pipe, one end of the liquid suction pipe extending into the circulating water tank, a liquid suction pump connected to the liquid suction pipe, and a plurality of spray heads connected to the other end of the liquid suction pipe, the spray heads being arranged in the spray tower, a filler layer being arranged below the spray heads and above the gas inlet of the spray tower.

[0010] Preferably, the automatic dosing module comprises a medicament tank containing an adjusting medicament, a dosing pipe connected to a liquid outlet of the medicament tank, the other end of the dosing pipe in communication with the circulating water tank, an electric control pump connected to the dosing pipe, a PH meter and a water level meter installed in the circulating water tank, and a liquid feeding pipe connected to the circulating water tank, an electric control valve connected to the liquid feeding pipe, and a water source connected to the liquid feeding pipe.

[0011] Preferably, the automatic stirring module comprises a stirring shaft penetrating through the upper surface of the circulating water tank, the stirring shaft being driven by a first electric motor fixedly connected above the circulating water tank, and a plurality of stirring blades arranged on the lower part of the stirring shaft in an up-down manner.

[0012] Preferably, the environment-friendly purification boiler further comprises a coal block crushing device, the coal block crushing device comprising a crushing shell fixedly connected to the upper end of the base, a crushing tank fixedly connected to the inner bottom surface of the crushing shell, a first slope arranged on the inner bottom surface of the crushing tank, a transverse filter plate one arranged above the first slope and fixedly connected to the inner wall of the crushing tank, a coal conveying pipe fixedly connected to the lower end of the right side wall of the crushing tank and extending into the boiler body through the right inner wall of the crushing shell, a second electric motor fixedly connected to the inner top surface of the crushing shell, a crushing shaft fixedly connected to the output end of the second electric motor and penetrating through the upper wall of the crushing tank, and a plurality of crushing blades arranged on the lower part of the crushing shaft in an up-down manner.

[0013] Preferably, the coal briquettes crushing device further comprises a crushing box fixedly connected to the inner wall of the crushing shell, a second filter plate is arranged in the crushing box, a second slope is arranged on the bottom surface of the crushing box, a material conveying pipe is connected to the bottom surface of the crushing box, the discharge opening of the material conveying pipe is in communication with the inside of the crushing box, a feeding pipe is in communication with the upper wall of the crushing box and penetrates through the upper wall of the crushing shell, an extrusion plate is slidably arranged above the second filter plate along the left-right direction, a sliding rod is fixedly connected to the right side surface of the extrusion plate, the sliding rod slidably penetrates through the right side wall of the crushing box, and a spring is sleeved on the sliding rod and fixedly connected to the right side surface of the extrusion plate and the right side wall of the crushing box.

[0014] Preferably, sliding rails are fixedly connected to the inner walls on the front and rear sides of the crushing shell, an auxiliary block is slidably connected to the sliding rails, the auxiliary block is L-shaped, the left end of the horizontal section of the auxiliary block is fixedly connected to the sliding rod, a sliding groove is arranged on the horizontal section of the auxiliary block, the crushing shaft penetrates through the sliding groove, a notched gear is fixedly sleeved on the crushing shaft, a rack is fixedly connected to the upper surface of the horizontal section of the auxiliary block, the rack is in meshing transmission with the notched gear, and a knocking block is fixedly connected to the lower part of the left side wall of the vertical section of the auxiliary block.

[0015] Preferably, the device further comprises:

[0016] A first flow rate sensor is installed in the liquid adding pipe and used for detecting the flow rate of the liquid in the liquid adding pipe.

[0017] A second flow rate sensor is installed in the medicine adding pipe and used for detecting the flow rate of the liquid in the medicine adding pipe.

[0018] A timer is used for timing the liquid supplementing time.

[0019] A control device is electrically connected to the first motor, the electrically controlled pump, the electrically controlled valve, the water level meter, the PH meter, the first flow rate sensor, the second flow rate sensor and the timer, and controls the electrically controlled valve, the electrically controlled pump, the alarm, the timer to work based on the PH meter, the first flow rate sensor and the second flow rate sensor.

[0020] The technical scheme of the present application will be further described in detail below with reference to the drawings and embodiments.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The present application sets the automatic flue gas suction module, the automatic medicine adding module, the automatic stirring module and the automatic spraying module, does not need flue gas bypass, has high automation degree, good purification effect, meets the requirements of environmental protection and sustainable development, and liberates a large amount of manpower.

[0023] The coal block crushing device solves the problem that the coal needs to be crushed and then put into the boiler for full combustion when the coal is burned in most power plant boilers at present, and the steps are too cumbersome, so the labor cost and investment cost are increased. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are included to provide a further understanding of the application, and are made a part of the specification. In the drawings:

[0025] Fig. 1 It is a structural schematic diagram of the present application;

[0026] Fig. 2 It is a front view structural schematic diagram of the coal block crushing device of the present application;

[0027] Fig. 3 It is a top view structural schematic diagram of the connection of the missing angle gear and the rack of the present application;

[0028] In the drawings: 1, boiler body; 2, automatic smoke suction module; 3, spray tower; 4, automatic spray module; 5, circulating water tank; 6, circulating pipe; 7, automatic stirring module; 8, automatic dosing module; 9, flue; 10, smoke suction cover; 11, filter box; 12, filter screen; 13, gas conveying pipe; 14, liquid pumping pipe; 15, liquid pumping pump; 16, spray head; 17, filler layer; 18, chemical agent tank; 19, dosing pipe; 20, liquid feeding pipe; 21, stirring shaft; 22, first motor; 23, stirring blade; 24, coal block crushing device; 25, crushing shell; 26, crushing box; 27, first slope; 28, filter plate one; 29, coal conveying pipe; 30, second motor; 31, crushing shaft; 32, crushing blade; 33, crushing box; 34, filter plate two; 35, second slope; 36, material conveying pipe; 37, feeding pipe; 38, extrusion plate; 39, sliding rod; 40, spring; 41, sliding rail; 42, auxiliary block; 43, sliding groove; 44, missing angle gear; 45, rack; 46, knocking block; 47, base. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and do not limit the present application.

[0030] In addition, the descriptions such as "first", "second" and the like in the present application are only for the purpose of description, and are not intended to particularly indicate the order or sequence, nor to limit the present application, which are merely for distinguishing the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features of various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0031] The present application provides the following embodiments

[0032] Embodiment 1

[0033] The present application provides an environmental protection and purification boiler for power plant, a base 47, the base 47 is fixedly connected with a boiler body 1, a spray tower 3, a circulating water tank 5, the boiler body 1 is connected with an automatic suction flue gas module 2, the gas outlet of the automatic suction flue gas module 2 is communicated with the gas inlet of the spray tower 3, the spray tower 3 is connected with an automatic spray module 4, the water inlet of the automatic spray module 4 is communicated with the circulating water tank 5, the water outlet of the spray tower 3 and the water inlet of the circulating water tank 5 are communicated through a circulating pipe 6, an automatic stirring module 7 is arranged in the circulating water tank 5, and an automatic dosing module 8 is further connected outside the circulating water tank 5.

[0034] Preferably, the automatic suction flue gas module 2 comprises a flue 9, one end of the flue 9 is connected with a smoke suction hood 10, the smoke suction hood 10 extends into the boiler body 1, the other end of the flue 9 is connected with a filter box 11, the filter box 11 is provided with a filter screen 12, the gas outlet of the filter box 11 is communicated with the gas inlet of the spray tower 3 through a gas conveying pipe 13, and an air suction pump is installed on the flue 9.

[0035] The beneficial effects of the above technical solution are:

[0036] The flue gas generated by the combustion of coal in the boiler body 1 is sucked into the filter box 11 through the flue 9 by the smoke suction hood 10, the flue gas enters the spray tower 3 after being preliminarily filtered by the filter screen 12, the flue gas is fully contacted and reacted with the solution in the filler layer 17, and the flue gas is discharged to the atmosphere through the discharge port at the top of the spray tower 3 after being purified.

[0037] The setting of the smoke suction hood 10 improves the suction efficiency of the flue gas, the coal residue carried in the flue gas is filtered out by allowing the flue gas to enter the spray tower 3 after passing through the filter box 11, the sediment generated in the spraying process is reduced, the circulation frequency of the solution in the circulating water tank 5 is improved, and the resource loss is reduced.

[0038] The automatic stirring module 7 is arranged, so that the purification liquid can be mixed in real time during the purification process, the precipitation of the purification liquid is avoided, and the purification effect is ensured.

[0039] The present application solves the problems of the existing power plant boiler, including the following aspects:

[0040] 1. When the boiler flue gas is purified in the thermal power plant, the boiler flue gas needs to be sprayed with a purification liquid to decompose harmful substances in the flue gas. The purification liquid is usually composed of lime and water. The lime and water in the existing flue gas purification device are usually mixed and then transported to the boiler for purification. When the transportation distance is long or the lime and water are mixed for a long time before being transported to the boiler, the purification liquid is prone to precipitation, resulting in uneven mixing and poor purification effect.

[0041] Example 2

[0042] Based on example 1, as shown in Figs. 1-3 The automatic spraying module 4 includes a liquid suction pipe 14, one end of the liquid suction pipe 14 extends into the circulating water tank 5, a liquid suction pump 15 is connected to the liquid suction pipe 14, and a plurality of spray heads 16 are connected to the other end of the liquid suction pipe 14. The spray heads 16 are located in the spraying tower 3, and a filler layer 17 is arranged below the spray heads 16. The filler layer 17 is located above the gas inlet of the spraying tower 3.

[0043] The structure of the filler layer refers to the filler layer in the CN219050895U disclosed uniform flow type spraying tower.

[0044] Preferably, the automatic dosing module 8 includes a reagent tank 18, the reagent tank 18 contains a reagent, the liquid outlet of the reagent tank 18 is connected to a dosing pipe 19, the other end of the dosing pipe 19 is connected to the circulating water tank 5, an electric control pump is connected to the dosing pipe 19, a PH meter and a water level meter are installed in the circulating water tank 5, and a liquid adding pipe 20 is connected to the circulating water tank 5. An electric control valve is connected to the liquid adding pipe 20, and the liquid adding pipe 20 is connected to an external water source.

[0045] The reagent is used to increase the PH value of the solution, and the present application adopts a 20% concentration of sodium hydroxide solution.

[0046] Preferably, the automatic stirring module 7 includes a stirring shaft 21, the stirring shaft 21 penetrates through the upper surface of the circulating water tank 5, the stirring shaft 21 is driven by a first motor 22 fixedly connected above the circulating water tank 5, and a plurality of stirring blades 23 are arranged on the lower part of the stirring shaft 21 in an up-down interval.

[0047] The beneficial effects of the above technical solutions are:

[0048] The solution after reacting with the flue gas falls to the bottom of the spray tower 3 and returns to the circulating water tank 5 through the circulating pipe 6. The PH meter and the water level meter in the circulating water tank 5 monitor the liquid level and the PH value of the solution in the circulating water tank 5 in real time. When the liquid level of the solution is too low, the electric control valve is opened, and the external water source enters the circulating water tank 5 through the liquid adding pipe 20 until the liquid level in the circulating water tank 5 reaches the preset height, and then the electric control valve is closed. When the PH value of the solution in the circulating water tank 5 deviates from the preset range, the electric control pump is started, and the adjusting agent in the agent tank 18 is pumped into the circulating water tank 5 through the dosing pipe 19 until the PH value of the solution returns to the preset range. When the automatic spraying module 4 or the automatic dosing module 8 works, the first motor 22 starts to work, and the stirring of the stirring blade 23 accelerates the mixing of the solution in the circulating water tank 5 with the backflow solution or the adjusting agent, so as to ensure the accuracy of the measurement data of the PH meter and the spraying effect.

[0049] By setting the automatic dosing module 8, the liquid level and the PH value of the solution in the circulating water tank 5 are detected in real time by the PH meter and the water level meter. When the detected value exceeds the safety value, the automatic dosing module 8 is automatically started to supplement and adjust the solution, without the need for staff to adjust, which liberates a large amount of manpower and can supplement and adjust the solution more timely than manual adjustment, thereby ensuring the stability of the flue gas purification effect. By setting the automatic stirring module 7, the solution in the circulating water tank 5 can be quickly and uniformly mixed whether the adjusting agent is added or the solution backflows, thereby further ensuring the stability of the flue gas purification effect.

[0050] Example 3

[0051] Based on the example 1 or 2, as shown in Figs. 1-3 The coal block crushing device 24 includes a crushing shell 25, the crushing shell 25 is fixedly connected to the upper end of the base 47, a crushing box 26 is fixedly connected to the inner bottom surface of the crushing shell 25, a first slope 27 is arranged on the inner bottom surface of the crushing box 26, a transverse filter plate one 28 is arranged above the first slope 27, the filter plate one 28 is fixedly connected with the inner wall of the crushing box 26, a coal conveying pipe 29 is fixedly connected to the lower end of the right side wall of the crushing box 26, the coal conveying pipe 29 penetrates through the right side inner wall of the crushing shell 25 and extends into the boiler body 1, a second motor 30 is fixedly connected to the inner top surface of the crushing shell 25, a crushing shaft 31 is fixedly connected to the output end of the second motor 30, the crushing shaft 31 penetrates through the upper wall of the crushing box 26, and a plurality of crushing blades 32 are arranged on the lower part of the crushing shaft 31 in an up-down interval.

[0052] Preferably, the coal block crushing device 24 further comprises a crushing box 33 fixedly connected to the inner wall of the crushing shell 25, a second filter plate 34 is arranged in the crushing box 33, a second slope 35 is arranged on the bottom surface of the crushing box 33, a conveying pipe 36 is connected to the bottom surface of the crushing box 33, the outlet of the conveying pipe 36 is communicated with the inside of the crushing box 26, a feeding pipe 37 is communicated with the upper wall of the crushing box 33, the feeding pipe 37 penetrates through the upper wall of the crushing shell 25, a pressing plate 38 slides in the left-right direction above the second filter plate 34, a sliding rod 39 is fixedly connected to the right side surface of the pressing plate 38 and slides through the right side wall of the crushing box 33, a spring 40 is sleeved on the sliding rod 39, and the two ends of the spring 40 are fixedly connected to the right side surface of the pressing plate 38 and the right side wall of the crushing box 33.

[0053] Preferably, sliding rails 41 are fixedly connected to the inner walls on the front and rear sides of the crushing shell 25, auxiliary blocks 42 are slidably connected to the sliding rails 41, the auxiliary blocks 42 are L-shaped, the left end of the horizontal section of the auxiliary blocks 42 is fixedly connected to the sliding rod 39, sliding grooves 43 are arranged on the horizontal section of the auxiliary blocks 42, the crushing shaft 31 penetrates through the sliding grooves 43, a notched gear 44 is fixedly sleeved on the crushing shaft 31, a rack 45 is fixedly connected to the upper surface of the horizontal section of the auxiliary blocks 42, the rack 45 is in meshing transmission with the notched gear 44, and knocking blocks 46 are fixedly connected to the lower part of the left side wall of the vertical section of the auxiliary blocks 42.

[0054] The above technical scheme has the following beneficial effects:

[0055] 1. When the coal block is crushed, first, the complete coal block is put into the feeding pipe 37, the coal block enters the crushing box 33 along the feeding pipe 37, the second motor 30 drives the crushing shaft 31 to rotate clockwise, thereby driving the notched gear 44 to rotate, the notched gear 44 is in meshing transmission with the rack 45, thereby driving the auxiliary blocks 42 to move to the right, so that the pressing plate 38 is driven to move to the right through the sliding rod 39 to compress the spring 40, when the notched gear 44 rotates to the position where the missing part is not in meshing transmission with the rack 45, the pressing plate 38 moves to the left under the action of the spring 40, thereby impacting and crushing the coal block in the crushing box 33, the coal block is crushed into smaller coal blocks, the coal blocks meeting the size requirements fall into the crushing box 26 through the second filter plate 34 and enter the crushing box 26 along the conveying pipe 36, the larger coal blocks are intercepted by the second filter plate 34 and are crushed again with the coal blocks in the next batch entering the crushing box 33, the coal blocks entering the crushing box 26 are crushed into coal powder by the crushing blades 32, then fall on the first slope 27 after passing through the first filter plate 28 and enter the coal conveying pipe 29 to enter the boiler body 1 to be burned, when the auxiliary blocks 42 rebound under the action of the spring 40, the knocking blocks 46 knock the shell of the crushing box 26, thereby knocking off the coal dregs adhered to the inner wall of the crushing box 26, and the coal powder adhered to the first slope 27 is also shaken off and falls into the coal conveying pipe 29 under the action of the vibration.

[0056] 2. The coal block is preliminarily crushed by the crushing box 33, which is beneficial to improve the efficiency of subsequent crushing, prevents the crushing blade 32 from being stuck due to the coal block being too large, causes the crushing box 26 to malfunction, reduces the failure rate of the coal block crushing device 24, controls the rate of coal entering the crushing box 33, prevents a large amount of coal from entering the crushing box 26 at one time, causes the crushing box 26 to be blocked due to too many coal blocks, further reduces the failure rate of the coal block crushing device 24, controls the size of the coal block entering the crushing box 26 through the filter plate 34, prevents part of the coal block from being too hard to be crushed by one-time impact, and can keep the material conveying pipe 36 open at the same time. The coal block of the appropriate size will automatically fall into the crushing box 26, so that the opening and closing of the material conveying pipe 36 is not manually controlled by the staff to control the transportation of coal after the staff manually observes the coal block in the crushing box 33, the automation degree of coal crushing is improved, the work burden of the staff is reduced, and the coal block crushed to the appropriate size will fall into the crushing box 26, leaving space for adding new coal blocks into the crushing box 33. The uncrushed coal blocks remain in the crushing box 33 for further crushing, improving the crushing efficiency in the crushing box 33 and ensuring the crushing effect. The first slope 27 is arranged on the bottom surface of the crushing box 26, the coal powder falls along the first slope 27, prevents part of the bottom layer coal powder from being deposited in the dead angle for a long time and eventually deteriorated, the knocking block 46 knocks the shell of the crushing box 26, shakes the coal powder adhered to the side wall and the first slope 27, prevents the coal powder from being deposited for a long time and caked, reduces the loss of coal powder in the crushing process, the whole coal block crushing device 24 is closed and works, the coal block is directly crushed and put into the boiler body 1 for combustion, reduces the loss of coal powder in the transportation process, improves the cleanliness of the production environment, and protects the health of the staff.

[0057] The present application solves the following problems raised in the background art: At present, most of the coal-fired power plant boilers need to crush the coal after the coal is crushed, and then the coal powder is put into the boiler for full combustion. In the prior art, the crushed coal is manually transported to the boiler, which increases the labor cost.

[0058] Example 4

[0059] Based on the embodiments 2 or 3, further comprising:

[0060] A first flow rate sensor is installed in the liquid adding pipe 20 for detecting the flow rate of the liquid in the liquid adding pipe 20;

[0061] A second flow rate sensor is installed in the chemical adding pipe 19 for detecting the flow rate of the liquid in the chemical adding pipe 19;

[0062] A timer is used for timing the liquid supplementing time;

[0063] The control device, alarm, control device is respectively first motor 22, electric control pump, electric control valve, water level meter, PH meter, first flow sensor, second flow sensor and timer electric connection, the control device is based on PH meter, first flow sensor, second flow sensor, control electric control valve, electric control pump, alarm, timer work, including:

[0064] Based on formula (1), the flow rate ratio K1 of the added water and the adjusting agent under the minimum liquid supplement condition is calculated;

[0065]

[0066] Wherein, ρ is the density of the adjusting agent, B is the mass fraction of the adjusting agent solvent, D is the bottom area of the circulating water tank (5), H1 is the lowest liquid level height in the circulating water tank (5) (the lowest liquid level allowed to ensure reliable operation of the automatic spraying module), H2 is the actual liquid level height in the circulating water tank (5), C is the molar mass of the adjusting agent solvent, A1 is the lowest PH value of the required PH range of the solution in the circulating water tank (5), A2 is the PH value of the existing solution in the circulating water tank (5), R1 is the radius of the liquid adding pipe (20), and R2 is the radius of the medicine adding pipe (19); The lowest hydroxyl ion concentration of the required PH range of the solution in the circulating water tank (5), The existing solution in the circulating water tank (5) is the hydroxyl ion concentration;

[0067] Based on formula (2), the flow rate ratio K2 of the added water and the adjusting agent under the highest liquid supplement condition is calculated;

[0068]

[0069] Wherein, H3 is the highest liquid level height in the circulating water tank (5), and A3 is the highest PH value of the required PH range of the solution in the circulating water tank; The highest hydroxyl ion concentration of the required PH range of the solution in the circulating water tank (5),

[0070] Based on formula (3), the actual flow rate ratio K of the actual liquid adding pipe (20) and the medicine adding pipe (19) is calculated;

[0071]

[0072] Wherein, V1 is the actual flow rate of the medicine adding pipe, and V2 is the actual flow rate of the liquid adding pipe (20);

[0073] whether the calculated actual flow rate ratio of the liquid adding pipe and the medicine adding pipe is within the preset reference range [K2, K1], when the calculated actual flow rate ratio K value is not within the preset reference range [K2, K1], the alarm is controlled to alarm, and the flow rate of the medicine adding pipe is adjusted by adjusting the power of the electric control pump to make the actual flow rate ratio K enter the range [K2, K1];

[0074] the liquid supplementing time is calculated based on formula (4);

[0075]

[0076] wherein H4 is a preset target liquid level height after final liquid supplementing;

[0077] the opening time of the electric control valve and the electric control pump is set by using the calculated liquid supplementing time, and the electric control valve and the electric control pump are automatically closed when the liquid supplementing time ends.

[0078] The technical scheme has the beneficial effects that:

[0079] The number of hydroxyl groups required to be supplemented in two cases of the lowest PH value and the highest liquid level within the required range of the PH range required by reaching the solution requirement of the lowest liquid level and the highest liquid level within the required range of the PH range required by reaching the solution requirement is calculated according to the liquid level height and the PH value in the existing circulating water tank 5, and the volume of the adjusting agent required is obtained according to the chemical property of the adjusting agent. Since the difference between the PH value in the specified range and the neutral PH is large, the influence of the ionization of the distilled water on the PH value of the solution after the distilled water is added can be ignored, so the distilled water is added to make up to the target liquid level, and the volume of the distilled water required to reach the lowest liquid level and the highest liquid level of the solution after the adjusting agent is added is calculated, and the ratio of the flow rates of the medicine adding pipe 19 and the liquid adding pipe 20 required in the case of simultaneous work and the same liquid supplementing time is obtained according to the diameters of the medicine adding pipe 19 and the liquid adding pipe 20, and the allowable value range of the flow rate ratio of the medicine adding pipe 19 and the liquid adding pipe 20 is obtained. When the measured actual flow rate ratio of the medicine adding pipe 19 and the liquid adding pipe 20 exceeds the allowable range, the alarm is controlled to alarm, and the flow rate of the medicine adding pipe 19 is adjusted by adjusting the power of the electric control pump to make the flow rate ratio enter the allowable range. Then, the working time of the electric control pump and the electric control valve is determined according to the expected liquid level height after liquid supplementing by calculating the required liquid supplementing time according to the actually measured flow rate of the medicine adding pipe 19 and the flow rate of the liquid adding pipe 20, so that the liquid level height of the solution obtained after the final liquid supplementing is ensured to be within a reasonable range and the PH value is within the working range.

[0080] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. An environmentally friendly purification boiler for power plants, characterized in that: include: The base (47) is fixedly connected to the boiler body (1), the spray tower (3), and the circulating water tank (5). The boiler body (1) is connected to an automatic flue gas intake module (2). The outlet of the automatic flue gas intake module (2) is connected to the inlet of the spray tower (3). The spray tower (3) is connected to an automatic spray module (4). The inlet of the automatic spray module (4) is connected to the circulating water tank (5). The outlet of the spray tower (3) is connected to the inlet of the circulating water tank (5) through a circulation pipe (6). An automatic stirring module (7) is installed inside the circulating water tank (5). An automatic dosing module (8) is also connected to the outside of the circulating water tank (5). The automatic flue gas intake module (2) includes a flue (9), one end of which is connected to a fume hood (10), which extends into the boiler body (1), and the other end of the flue (9) is connected to a filter box (11). A filter screen (12) is installed inside the filter box (11), and the outlet of the filter box (11) is connected to the inlet of the spray tower (3) through a gas transmission pipe (13). An air pump is installed on the flue (9). The automatic spraying module (4) includes a liquid extraction pipe (14), one end of which extends into the circulating water tank (5), a liquid extraction pump (15) is connected to the liquid extraction pipe (14), and the other end of the liquid extraction pipe (14) is connected to several nozzles (16). The nozzles (16) are located inside the spraying tower (3), and a packing layer (17) is provided below the nozzles (16). The packing layer (17) is located above the air inlet of the spraying tower (3). The automatic dosing module (8) includes a dosing tank (18), which contains a regulating agent. The outlet of the dosing tank (18) is connected to a dosing pipe (19), and the other end of the dosing pipe (19) is connected to a circulating water tank (5). An electric pump is connected to the dosing pipe (19). A pH meter and a water level gauge are installed in the circulating water tank (5). A liquid filling pipe (20) is also connected to the circulating water tank (5). An electric control valve is connected to the liquid filling pipe (20), and the liquid filling pipe (20) is connected to an external water source. The automatic stirring module (7) includes a stirring shaft (21), which runs through the upper surface of the circulating water tank (5). The stirring shaft (21) is driven by a first motor (22) fixedly connected above the circulating water tank (5). Several stirring blades (23) are arranged at intervals on the lower part of the stirring shaft (21). It also includes a coal crushing device (24), which includes a crushing shell (25), the crushing shell (25) is fixedly connected to the upper end of the base (47), a crushing box (26) is fixedly connected to the bottom surface of the crushing shell (25), a first slope (27) is provided on the bottom surface of the crushing box (26), a horizontal filter plate (28) is provided above the first slope (27), the filter plate (28) is fixedly connected to the inner wall of the crushing box (26), a coal feeding pipe (29) is fixedly connected to the lower end of the right side wall of the crushing box (26), the coal feeding pipe (29) penetrates the inner wall of the right side of the crushing shell (25) and extends into the boiler body (1), a second motor (30) is fixedly connected to the top surface of the crushing shell (25), a crushing shaft (31) is fixedly connected to the output end of the second motor (30), the crushing shaft (31) penetrates the upper wall of the crushing box (26), and a number of crushing blades (32) are arranged at intervals at the bottom of the crushing shaft (31); The coal crushing device (24) also includes a crushing box (33), which is fixedly connected to the inner wall of the crushing shell (25). A second filter plate (34) is installed inside the crushing box (33). A second slope (35) is provided on the bottom surface of the crushing box (33). A conveying pipe (36) is connected to the bottom surface of the crushing box (33). The outlet of the conveying pipe (36) is connected to the inside of the crushing box (26). A feed pipe (37) is connected to the upper wall of the crushing box (33). The feed pipe (37) passes through the upper wall of the crushing shell (25). Above the filter plate (34), there is a pressing plate (38) that slides in the left and right direction. A sliding rod (39) is fixedly connected to the right side of the pressing plate (38). The sliding rod (39) slides through the right side wall of the crushing box (33). A spring (40) is fitted on the sliding rod (39). The two ends of the spring (40) are fixedly connected to the right side of the pressing plate (38) and the right side wall of the crushing box (33) respectively. A slide rail (41) is fixedly connected to the inner walls of the front and rear sides of the crushing shell (25). An auxiliary block (42) is slidably connected to the slide rail (41). The auxiliary block (42) is L-shaped. The left end of the horizontal section of the auxiliary block (42) is fixedly connected to the sliding rod (39). A sliding groove (43) is provided on the horizontal section of the auxiliary block (42). The crushing shaft (31) passes through the sliding groove (43). A notched gear (44) is fixedly fitted on the crushing shaft (31). A rack (45) is fixedly connected to the upper surface of the horizontal section of the auxiliary block (42). The rack (45) meshes with the notched gear (44) for transmission. A striking block (46) is fixedly connected to the lower part of the left side wall of the vertical section of the auxiliary block (42). Also includes: The first flow rate sensor is installed inside the liquid filling tube (20) to detect the liquid flow rate inside the liquid filling tube (20); The second flow rate sensor is installed inside the dosing tube (19) to detect the liquid flow rate inside the dosing tube (19); A timer is used to time the infusion time. The control device and the alarm are electrically connected to the first motor (22), the electric pump, the electric valve, the water level gauge, the pH meter, the first flow velocity sensor, the second flow velocity sensor and the timer respectively. The control device controls the electric valve, the electric pump, the alarm and the timer to work based on the pH meter, the first flow velocity sensor and the second flow velocity sensor.

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