CN216106486U - High-temperature bypass evaporation device for treating desulfurization wastewater - Google Patents
High-temperature bypass evaporation device for treating desulfurization wastewater Download PDFInfo
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Abstract
The utility model relates to a high-temperature bypass evaporation device for treating desulfurization wastewater, belongs to the technical field of desulfurization wastewater, and solves the technical problems of low efficiency, increased energy consumption, equipment corrosion and the like of a triple-effect flash evaporation system caused by filtrate backflow. The solution is as follows: a high-temperature bypass evaporation device for treating desulfurization wastewater comprises an evaporation tower, a wastewater atomization device, a plurality of groups of wall-attached air devices, a plurality of groups of rapping ash removal device groups, a temperature monitoring system and a control system; the wall of the evaporation tower is sequentially provided with a wastewater atomization device, an adherence air device and a rapping ash removal device group from top to bottom, and the control system is electrically connected with the wastewater atomization device, the adherence air device, the rapping ash removal device group and the temperature monitoring system respectively. According to the utility model, a bypass is led out between the SCR flue gas denitration device and the dust remover for wastewater treatment, and the original high-temperature flue gas is utilized without additional separate treatment, so that the space is saved, the efficiency is improved, and the cost is saved.
Description
Technical Field
The utility model belongs to the technical field of desulfurization wastewater treatment, and particularly relates to a high-temperature bypass evaporation device for treating desulfurization wastewater.
Background
With the increasingly severe environmental protection situation in China, the national requirements for environmental protection become more stringent, and the environmental protection standards are becoming more and more stringent within the applicable range. In the aspect of water treatment, the water environment protection of the country is raised to the national construction strategy level. Explicitly proposed in the action plan for preventing and treating water pollution, which is published by State administration of 4, month and 2 days in 2015: industrial pollution control is required to be tenaciously held. As a large household for water use and drainage, the water consumption of a power plant can account for about 20% of the total amount of industrial water, and under the current increasingly strict environment-friendly background, the realization of zero discharge of the wastewater of the whole plant is a necessary trend.
The desulfurization waste water comes from power plant's flue gas desulfurization device and cleaning system, and in order to guarantee desulfurization efficiency in the desulfurization system, protection sweetener, the thick liquid chloride ion must maintain in reasonable concentration in the desulfurization device, therefore, need regularly discharge the waste water in the desulfurization device. The multi-effect flash evaporation system is one of mainstream processes for treating desulfurization wastewater, the process takes flue gas waste heat as a heat source, the desulfurization wastewater is evaporated and concentrated under the condition of negative pressure, the concentration rate can reach 10 times, the concentrated solution of the desulfurization wastewater is subjected to pressure filtration by a pressure filter, filter cakes are transported away by a mud dragging vehicle, the salt content of filtrate is very high, the concentration of chloride ions is 8-10 ten thousand mg/L, the boiling point of the wastewater in the three-effect flash evaporation system is increased after the chloride ions directly flow back to the three-effect flash evaporation system, the evaporation efficiency is reduced, the energy consumption is increased, and the service life of three-effect equipment is influenced, so that the final treatment of the filtrate directly influences the long-term, stable and efficient operation of the three-effect flash evaporation system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art, provides a high-temperature bypass evaporation device for treating desulfurization wastewater, solves the technical problems of low efficiency, increased energy consumption, equipment corrosion and the like of a triple-effect flash evaporation system caused by filtrate backflow, and ensures long-term efficient and stable operation of the triple-effect flash evaporation system.
In order to solve the problems, the technical scheme of the utility model is as follows: a high-temperature bypass evaporation device for treating desulfurization waste water, wherein: comprises an evaporation tower, a wastewater atomization device, a plurality of groups of wall-attached air devices, a plurality of groups of rapping ash removal device groups, a temperature monitoring system and a control system;
the top end of the evaporation tower is a high-temperature flue gas inlet end, the bottom end of the evaporation tower is a flue gas outlet end, a waste water atomization device, an adherence air device and a rapping ash removal device group are sequentially arranged on the tower wall of the evaporation tower from top to bottom, and the waste water atomization device atomizes waste water and sprays the atomized waste water into the evaporation tower; the wall-attached wind device is used for avoiding the wall attachment of wastewater; the vibrating ash removal device is used for processing ash on the inner wall of the evaporation tower;
the temperature monitoring system monitors the temperatures at different positions, and the control system is respectively electrically connected with the wastewater atomization device, the wall-attached air device, the rapping ash removal device group and the temperature monitoring system.
Further, the evaporating tower includes from last to the inlet section, interlude and the export section that connect gradually down, the inlet section is the cone structure that makes progress, the export section is the cone structure downwards, the evaporating tower internal fixation of waste water atomizing device top is provided with the flue gas equipartition ware, the evaporating tower lateral wall is last to being provided with a plurality of groups strengthening rib to the equipartition down from last, the evaporating tower lower part is provided with the access hole.
Further, the flue gas uniform distributor comprises two groups of flue gas uniform distribution plates, the two groups of flue gas uniform distribution plates are arranged up and down, the outer diameter of each flue gas uniform distribution plate is equal to the inner wall of the corresponding evaporation tower, and a plurality of groups of flue gas through holes are uniformly distributed on the flue gas uniform distribution plates.
Further, waste water atomizing device includes a plurality of sets of two fluid spray gun, air compressor, waste water pump and waste water case, a plurality of sets the two fluid spray gun is located on the evaporating tower along evaporating tower circumferencial direction equipartition, the liquid outlet of waste water case passes through the feed liquor pipe and is connected with the inlet of waste water pump, the liquid outlet of waste water pump passes through the feed liquor pipe and is connected with the inlet of two fluid spray gun respectively, air compressor passes through the intake pipe and is connected with the air inlet of two fluid spray gun respectively, be provided with the liquid valve on the feed liquor pipe between waste water pump and the two fluid spray gun, be provided with the gas valve in the intake pipe between air compressor and the two fluid spray gun.
Further, the two-fluid spray guns are provided with three groups, and are single-hole type two-fluid spray guns.
Further, the high-temperature bypass evaporation device is arranged between the boiler flue gas treatment device and the desulfurization wastewater treatment device, the boiler flue gas treatment device comprises a boiler flue, an air preheater, a dust remover, a desulfurization tower and a chimney which are sequentially connected through a first connecting flue and arranged at the tail end of the boiler, and an SCR flue gas denitration device is arranged at the tail end of the boiler flue; the high-temperature flue gas inlet end of the evaporation tower is communicated with a first connecting flue between a boiler flue and an air preheater through a second connecting flue, and the flue gas outlet end of the evaporation tower is communicated with a first connecting flue between the air preheater and a dust remover through a third connecting flue; the second connecting flue is provided with a regulating valve and a first shutoff valve, the third connecting flue is provided with a second shutoff valve, and an elbow of the third connecting flue, which is close to one side of the evaporation tower, is provided with a dust removal sampling hole;
the desulfurization wastewater treatment device comprises a plate-and-frame filter press and a three-effect flash system, wherein a liquid inlet of the three-effect flash system is connected with a liquid outlet of a desulfurization tower through a connecting pipeline, a liquid outlet of the three-effect flash system is connected with a liquid inlet of the plate-and-frame filter press through a connecting pipeline, and a liquid outlet of the plate-and-frame filter press is connected with a liquid inlet of a wastewater tank through a connecting pipeline;
and a soot blower is arranged on the third connecting flue and is electrically connected with a control system.
Furthermore, the temperature monitoring system comprises a first temperature transmitter arranged on the second connecting flue, two groups of second temperature transmitters arranged on the third connecting flue and a plurality of groups of third temperature transmitters arranged on the tower wall of the evaporation tower, wherein the plurality of groups of third temperature transmitters are sequentially arranged on the tower wall of the evaporation tower from top to bottom, the two groups of second temperature transmitters are respectively and relatively arranged on the upper part and the lower part of the horizontally arranged third connecting flue, and the temperature measuring point of the second temperature transmitter arranged on the lower part extends into the flue for 20-30 mm.
Further, the annular bellows of evaporating tower lateral wall is located including fixed cover to the adherence wind device, annular bellows erects the cross-section and is "Contraband" shape structure and its opening towards the evaporating tower, be provided with the air intake on the annular bellows lateral wall, the air intake passes through the air-supply line with outside wind regime and is connected, the evaporating tower wall at top surface place is tower wall on the annular bellows, the evaporating tower wall at bottom surface place is tower wall under the annular bellows, the bottom of tower wall is located to the top cover of tower wall under the annular, the external diameter of tower wall is less than the internal diameter size of tower wall under the annular on the annular, be provided with adherence wind air inlet gap between the outer wall of tower wall and the inner wall of tower wall under the annular on the annular.
Further, wall-attached wind device is provided with three groups, three groups wall-attached wind device sets gradually from last to bottom, the evaporation tower external diameter of wall-attached wind device top is D, the superiors wall-attached wind device top surface is 3D to the altitude mixture ratio between the double-fluid spray gun.
Further, it is provided with four layers to shake ash handling equipment group, and on the interlude of evaporation tower was located to the preceding three-layer, the export section of evaporation tower was located to the fourth layer, preceding three-layer shake ash handling equipment group and include that three groups that set up along evaporation tower outer wall circumferencial direction equipartition shake ash handling equipment, the fourth layer shake two sets of dust handling equipment that shakes that ash handling equipment group set up including the symmetry.
Compared with the prior art, the utility model has the beneficial effects that:
the device is arranged between an SCR flue gas denitration device and a dust remover in a boiler flue gas treatment device, a certain amount of high-temperature flue gas with the temperature of 300-350 ℃ is extracted from an outlet flue gas channel end of the SCR flue gas denitration device and enters an evaporation tower, desulfurization wastewater is atomized into liquid drops with the temperature of 50-100 micrometers by a wastewater atomization device and then is sprayed into the evaporation tower, the high-temperature flue gas and the atomized liquid drops are fully mixed, moisture in the wastewater is quickly evaporated, salt in the wastewater is crystallized and combined with ash in the flue gas, formed particles enter the dust remover along with the flue gas and are captured by the dust remover, and the temperature of the outlet flue gas is controlled to be more than 170 ℃. The utility model solves the problem of final treatment of the filtrate, and the filtrate is treated by the high-temperature bypass evaporator to thoroughly solve the problem of zero emission of the desulfurization wastewater.
The utility model solves the problem of corrosion and blockage of high-temperature bypass evaporator equipment, the waste water is atomized into 50-100 micron liquid drops through the atomization of the waste water atomization device, the waste water is ensured to be evaporated before contacting the wall surface of an evaporation tower, a layer of protective air is formed on the inner wall of the evaporator by an adherence air device, the adherence probability of the waste water is reduced, the adherence dust caused by improper operation is periodically cleaned by a rapping dust removal device, a temperature monitoring system judges the atomization effect of the atomization system through the temperature gradient change and the temperature difference in the evaporation tower, whether adherence exists or not is further fed back to an operator to check the running state of the equipment, the running parameters are timely adjusted, and the long-term, stable and efficient running of the equipment is ensured.
According to the utility model, a bypass is led out between the SCR flue gas denitration device and the dust remover for wastewater treatment, and the original high-temperature flue gas is utilized without additional separate treatment, so that the space is saved, the efficiency is improved, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of the process flow structure of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a view A-A of FIG. 2;
fig. 4 is a schematic structural view of the smoke uniform distribution plate in fig. 2.
Detailed Description
The utility model is described in further detail below with reference to the figures and examples.
A high-temperature bypass evaporation apparatus for treating desulfurization waste water as shown in fig. 1 to 4, wherein: comprises an evaporation tower 1, a wastewater atomization device 2, a plurality of groups of wall-attached air devices 3, a plurality of groups of rapping ash removal device groups 4, a temperature monitoring system 5 and a control system;
the top end of the evaporation tower 1 is a high-temperature flue gas inlet end 1-1, the bottom end of the evaporation tower 1 is a flue gas outlet end 1-2, a waste water atomization device 2, an adherence air device 3 and a rapping ash removal device group 4 are sequentially arranged on the tower wall of the evaporation tower 1 from top to bottom, and the waste water atomization device 2 atomizes waste water and sprays the atomized waste water into the evaporation tower 1; the wall-attached wind device 3 is used for avoiding the wall attachment of the wastewater; the rapping ash removal device group 4 is used for treating ash on the inner wall of the evaporation tower 1;
the temperature monitoring system 5 monitors the temperatures at different positions, and the control system is respectively electrically connected with the wastewater atomization device 2, the adherence air device 3, the rapping ash removal device group 4 and the temperature monitoring system 5.
Further, the evaporation tower 1 comprises an inlet section 1-3, an intermediate section 1-4 and an outlet section 1-5 which are sequentially connected from top to bottom, the inlet section 1-3 is of an upward cone structure, the outlet section 1-5 is of a downward cone structure, a flue gas uniform distributor 6 is fixedly arranged in the evaporation tower 1 above the wastewater atomization device 2, a plurality of groups of reinforcing ribs 1-6 are uniformly distributed on the outer side wall of the evaporation tower 1 from top to bottom, and an access hole 1-7 is formed in the lower portion of the evaporation tower 1. The material of the main body of the evaporation tower 1 is carbon steel lining 2205 or 2205, so that the equipment can meet the corrosion requirement. The optimal taper of the inlet section 1-3 is 53 degrees, the optimal taper of the outlet section 1-5 is 65 degrees, so that the uniform and stable distribution of airflow after the flue gas enters the evaporator is ensured, and the dead angle of flue gas distribution are reducedExcessive turbulence of the flue gas. According to the atomizing angle of the double-fluid spray gun 2-1, the diameter of the tower body is comprehensively determined according to the flow velocity of the flue gas in the evaporation tower 1, the wall sticking prevention of atomized waste water is ensured, and the length of the tank body is determined according to the atomizing particle size of the spray gun, the complete evaporation time of the waste water and the distance. The wastewater treatment capacity in this example was 1.0m3The diameter of the tank body is 2.0m, the length of the middle section is 14m, and the flow velocity of flue gas in the tower body is 3.5 m/s. The function of the reinforcing ribs 1-6 is to ensure the structural strength of the tower body, and in the embodiment, the reinforcing ribs 1-6 are arranged in a group every two meters. The arrangement of the access holes 1-7 can be used for periodically overhauling the equipment.
Further, the flue gas uniform distributor 6 comprises two groups of flue gas uniform distribution plates 6-1, the two groups of flue gas uniform distribution plates 6-1 are arranged up and down, the outer diameter size of each flue gas uniform distribution plate 6-1 is equal to the size of the inner wall of the corresponding evaporation tower 1, and a plurality of groups of flue gas through holes 6-1-1 are uniformly distributed on each flue gas uniform distribution plate 6-1. The flue gas uniform distribution plate 6-1 is arranged in two layers and has the function of uniformly distributing the flue gas on the whole cross section of the evaporation tower 1, ensuring that the flue gas is fully and uniformly contacted with the atomized desulfurization wastewater, and increasing the evaporation efficiency. The aperture ratio of the smoke uniform distribution plate 6-1 is controlled to be more than 56 percent, and the thickness is 10 mm.
Further, the wastewater atomization device 2 comprises a plurality of groups of double-fluid spray guns 2-1, an air compressor 2-2, a wastewater pump 2-3 and a wastewater tank 2-4, the groups of double-fluid spray guns 2-1 are uniformly distributed on the evaporation tower 1 along the circumferential direction of the evaporation tower 1, the liquid outlet of the waste water tank 2-4 is connected with the liquid inlet of the waste water pump 2-3 through a liquid inlet pipe, the liquid outlet of the waste water pump 2-3 is respectively connected with the liquid inlet of the two-fluid spray gun 2-1 through a liquid inlet pipe, the air compressor 2-2 is respectively connected with the air inlet of the double-fluid spray gun 2-1 through an air inlet pipe, a liquid valve 2-5 is arranged on a liquid inlet pipe between the waste water pump 2-3 and the double-fluid spray gun 2-1, and a gas valve 2-6 is arranged on a gas inlet pipe between the air compressor 2-2 and the double-fluid spray gun 2-1. The desulfurization waste water in the waste water tank 2-4 is atomized into 50-100 micron droplets through a double-fluid spray gun 2-1 and then sprayed into the evaporation tower 1, and the liquid valve 2-5 and the gas valve 2-6 respectively control the on-off of the waste water and the gas.
Further, three groups of double-fluid spray guns 2-1 are arranged, and the double-fluid spray guns 2-1 are single-hole type double-fluid spray gunsA fluid spray gun. The double-fluid spray gun is provided with three groups of double-purpose devices, the double-fluid spray gun 2-1 is provided with an anti-abrasion sleeve, and the anti-abrasion sleeve is made of 16 Mn. In this embodiment, the spray gun is a single-hole type two-fluid spray gun, and the diameter of the liquid hole is
The spray gun is not easy to block, the flow rate of a single spray gun is 500L/h, and the waste water can be atomized into liquid drops of 50-100 micrometers under the condition of 3.5 kilograms of pressure.
Further, the high-temperature bypass evaporation device is arranged between the boiler flue gas treatment device 7 and the desulfurization wastewater treatment device 8, the boiler flue gas treatment device 7 comprises a boiler flue 7-2, an air preheater 7-3, a dust remover 7-4, a desulfurization tower 7-5 and a chimney 7-6 which are sequentially connected through a first connecting flue 7-1 and are arranged at the tail end of the boiler, and an SCR flue gas denitration device 7-7 is arranged at the tail end of the boiler flue 7-2; the high-temperature flue gas inlet end 1-1 of the evaporation tower 1 is communicated with a first connecting flue 7-1 between a boiler flue 7-2 and an air preheater 7-3 through a second connecting flue 7-8, and the flue gas outlet end 1-2 of the evaporation tower 1 is communicated with the first connecting flue 7-1 between the air preheater 7-3 and a dust remover 7-4 through a third connecting flue 7-9; the second connecting flue 7-8 is provided with an adjusting valve 7-8-1 and a first shutoff valve 7-8-2, the first shutoff valve 7-8-2 is installed at a position close to one side of the SCR flue gas denitration device 7-7, and the adjusting valve 7-8-1 is arranged behind the first shutoff valve 7-8-2, so that the second connecting flue 7-8 is prevented from being blocked due to dust accumulation caused by small flue gas flow velocity due to small valve opening. The flue gas amount introduced into the evaporation tower 1 is controlled by the opening degree of the regulating valve 7-8-1, the opening degree of the valve is reduced when the boiler load is high, and the opening degree of the valve is increased when the boiler load is low. And a second shut-off valve 7-9-1 is arranged on the third connecting flue 7-9, and the first shut-off valve 7-8-2 and the second shut-off valve 7-9-1 are shut off simultaneously when the evaporation tower 1 needs to be overhauled. An ash removal sampling hole 7-9-2 is formed in the third connecting flue 7-9, close to the elbow of one side of the evaporation tower 1; collecting ash samples at regular intervals through the ash removal sampling holes 7-9-2, observing whether ash is accumulated at the bottom, measuring the moisture content of the ash samples, and judging whether the wastewater is completely evaporated.
The desulfurization wastewater treatment device 8 comprises a plate-and-frame filter press 8-1 and a triple-effect flash system 8-2, wherein a liquid inlet of the triple-effect flash system 8-2 is connected with a liquid outlet of a desulfurization tower 7-5 through a connecting pipeline, a liquid outlet of the triple-effect flash system 8-2 is connected with a liquid inlet of the plate-and-frame filter press 8-1 through a connecting pipeline, and a liquid outlet of the plate-and-frame filter press 8-1 is connected with a liquid inlet of a wastewater tank 2-4 through a connecting pipeline;
the third connecting flue 7-9 is provided with a soot blower 7-10, and the soot blower 7-10 is electrically connected with a control system. The soot blower 7-10 avoids excessive clogging of the third connecting flue 7-9 with soot.
Further, the temperature monitoring system 5 comprises a first temperature transmitter 5-1 arranged on a second connecting flue 7-8, two groups of second temperature transmitters 5-2 arranged on a third connecting flue 7-9 and a plurality of groups of third temperature transmitters 5-3 arranged on the tower wall of the evaporation tower 1, wherein the plurality of groups of third temperature transmitters 5-3 are sequentially arranged on the tower wall of the evaporation tower 1 from top to bottom, the two groups of second temperature transmitters 5-2 are respectively and oppositely arranged at the upper part and the lower part of the horizontally arranged third connecting flue 7-9, and the length of a temperature measuring point of the second temperature transmitter 5-2 arranged at the lower part extending into the flue is 20-30 mm. The first temperature transmitter 5-1 is used for measuring the flue gas temperature at the high-temperature flue gas inlet end 1-1 of the evaporation tower 1, a plurality of groups of the third temperature transmitters 5-3 are used for monitoring the temperature change in the evaporation tower 1, and the evaporation and wall adhesion conditions in the evaporation tower 1 are judged through the temperature change, wherein the third temperature transmitters 5-3 are provided with seven groups in the embodiment, and the group of the third temperature transmitters 5-3 at the lowest layer is arranged on the outlet section 1-5; when the temperature difference between the two groups of second temperature transmitters 5-2 is larger than 15 ℃, the bottom of the third connecting flue 7-9 is proved to have ash deposition, at the moment, a soot blower arranged in the third connecting flue 7-9 is started, and the ash deposition at the bottom of the third connecting flue 7-9 is blown up to be carried into the dust remover 7-4 by high-temperature flue gas and then is trapped by the dust remover 7-4.
Further, the wall-attached air device 3 comprises an annular air box 3-1 fixedly sleeved on the outer side wall of the evaporation tower 1, the vertical section of the annular air box 3-1 is in an Contraband-shaped structure, the opening of the annular air box 3-1 faces the evaporation tower 1, an air inlet 3-1-1 is arranged on the outer side wall of the annular air box 3-1, the air inlet 3-1-1 is connected with an external air source through an air inlet pipe, the tower wall of the evaporation tower 1 where the upper top surface of the annular air box 3-1 is located is an annular upper tower wall 1-8, the tower wall of the evaporation tower 1 where the lower bottom surface of the annular air box 3-1 is located is an annular lower tower wall 1-9, the top end of the annular lower tower wall 1-9 is sleeved at the bottom end of the annular upper tower wall 1-8, and the outer diameter of the annular upper tower wall 1-8 is smaller than the inner diameter of the annular lower tower wall 1-9, and wall-attached wind inlet gaps 1-10 are arranged between the outer walls of the annular upper tower walls 1-8 and the inner walls of the annular lower tower walls 1-9. The width D1 of the wall-mounted wind inlet gap 1-10 is 10mm, and the length D2 of the wall-mounted wind inlet gap 1-10 is 200 mm.
Further, paste wall wind device 3 and be provided with three groups, three groups paste wall wind device 3 from last to setting gradually down, paste 1 external diameter of evaporation tower above wall wind device 3 and be D, the superiors paste the height dimension between 3 top surfaces of wall wind device to the double-fluid spray gun 2-1 and be 3D. This position is the position where adherence of wastewater is most likely to occur. In the embodiment, the flow velocity of flue gas in the annular air box 3-1 is controlled to be 2 m/s. The wind velocity at the position of the air inlet gap 1-10 of the adherence wind is 10m/s, and the effective protection distance of the adherence wind is 2-2.5 m.
Further, the rapping dust removal device group 4 is provided with four layers, the first three layers are arranged on the middle section 1-4 of the evaporation tower 1, the fourth layer is arranged on the outlet section 1-5 of the evaporation tower 1, the first three layers of rapping dust removal device group 4 comprises three groups of rapping dust removal devices 4-1 which are uniformly distributed along the circumferential direction of the outer wall of the evaporation tower 1, and the fourth layer of rapping dust removal device group 4 comprises two groups of rapping dust removal devices 4-1 which are symmetrically arranged. The main effect is regularly to handle the ash content of adherence, prevents that salinity, chloride ion in the ash content from corroding equipment.
Before working, system parameters are adjusted to be optimal, the first shut-off valve 7-8-2 and the second shut-off valve 7-9-1 are opened, the wall-sticking wind device 3 is opened, and normal work of the wall-sticking wind device 3 is guaranteed.
Opening the regulating valve 7-8-1 and the wastewater atomization device 2, observing the temperature change in the evaporation tower 1 through the signal value of the third temperature transmitter 5-3, reducing the opening of the regulating valve 7-8-1 when the temperature of the flue gas outlet end 1-2 is higher than 190 ℃, increasing the opening of the regulating valve 7-8-1 when the temperature of the flue gas outlet end 1-2 is lower than 170 ℃, and ensuring that the temperature interval of the flue gas outlet end 1-2 is controlled at 170-190 ℃.
The pressure in the upper air inlet pipe of the air compressor 2-2 and the liquid valve 2-5 on the upper liquid inlet pipe of the waste water pump 2-3 are interlocked, when the pressure is less than 3.0 kg, the liquid valve 2-5 is closed, and the phenomenon that the evaporation is insufficient due to poor atomization of waste water caused by insufficient pressure of compressed air and the evaporator is blocked by the adherence of the waste water is prevented.
The temperature monitoring system 5 analyzes: under the normal operation working condition, the temperatures of the front four groups of temperature measuring points on the tower wall of the evaporation tower 1 are gradually reduced from top to bottom, the temperature difference between the fifth group of temperature measuring points and the sixth group of temperature measuring points is small, the temperature difference is less than 5 ℃, and the temperature tends to be stable. When the indication number of a certain temperature measuring point is abnormally reduced, the phenomenon of adherence possibly occurs in the area is indicated, at the moment, the rapping ash removal device 4-1 is started, adherence ash is removed, ash samples are collected at the ash removal sampling holes 7-9-2 for analysis, adherence reasons are analyzed, and the problem is solved. When the temperature difference between the two groups of second temperature transmitters 5-2 is larger than 15 ℃, the bottom of the third connecting flue 7-9 is proved to have ash deposition, at the moment, a soot blower arranged in the third connecting flue 7-9 is started, and the ash deposition at the bottom of the third connecting flue 7-9 is blown up to be carried into the dust remover 7-4 by high-temperature flue gas and then is trapped by the dust remover 7-4.
Claims (10)
1. The utility model provides a high temperature bypass evaporation plant for handling desulfurization waste water which characterized in that: comprises an evaporation tower (1), a wastewater atomization device (2), a plurality of groups of wall-attached air devices (3), a plurality of groups of rapping ash removal device groups (4), a temperature monitoring system (5) and a control system;
the top end of the evaporation tower (1) is a high-temperature flue gas inlet end (1-1), the bottom end of the evaporation tower (1) is a flue gas outlet end (1-2), a wastewater atomization device (2), an adherence air device (3) and a rapping ash removal device group (4) are sequentially arranged on the tower wall of the evaporation tower (1) from top to bottom, and the wastewater atomization device (2) atomizes the wastewater and then sprays the wastewater into the evaporation tower (1); the wall-attached wind device (3) is used for avoiding the wall attachment of wastewater; the vibrating ash removal device group (4) is used for treating ash on the inner wall of the evaporation tower (1);
the temperature monitoring system (5) monitors the temperatures of different positions, and the control system is respectively electrically connected with the wastewater atomization device (2), the adherence air device (3), the rapping ash removal device group (4) and the temperature monitoring system (5).
2. The high-temperature bypass evaporation device for treating desulfurization waste water according to claim 1, characterized in that: evaporating tower (1) includes from last to the inlet section (1-3), interlude (1-4) and the export section (1-5) that connect gradually down, inlet section (1-3) are the cone structure that makes progress, export section (1-5) are the cone structure downwards, evaporating tower (1) internal fixation of waste water atomizing device (2) top is provided with flue gas uniform distributor (6), evaporating tower (1) lateral wall is provided with a plurality of groups strengthening rib (1-6) from last to the equipartition down, evaporating tower (1) lower part is provided with access hole (1-7).
3. The high-temperature bypass evaporation device for treating desulfurization waste water according to claim 2, characterized in that: the flue gas uniform distributor (6) comprises two groups of flue gas uniform distribution plates (6-1), the two groups of flue gas uniform distribution plates (6-1) are arranged from top to bottom, the outer diameter of each flue gas uniform distribution plate (6-1) is equal to the inner wall size of the corresponding evaporation tower (1), and a plurality of groups of flue gas through holes (6-1-1) are uniformly distributed on each flue gas uniform distribution plate (6-1).
4. The high-temperature bypass evaporation device for treating desulfurization waste water according to claim 1, characterized in that: the waste water atomization device (2) comprises a plurality of groups of double-fluid spray guns (2-1), air compressors (2-2), a waste water pump (2-3) and a waste water tank (2-4), the groups of double-fluid spray guns (2-1) are uniformly distributed on the evaporation tower (1) along the circumferential direction of the evaporation tower (1), the liquid outlet of the waste water tank (2-4) is connected with the liquid inlet of the waste water pump (2-3) through liquid inlet pipes, the liquid outlet of the waste water pump (2-3) is respectively connected with the liquid inlet of the double-fluid spray guns (2-1) through liquid inlet pipes, the air compressors (2-2) are respectively connected with the air inlets of the double-fluid spray guns (2-1) through air inlet pipes, and liquid valves (2-5) are arranged on the liquid inlet pipes between the waste water pump (2-3) and the double-fluid spray guns (2-1), and a gas valve (2-6) is arranged on a gas inlet pipe between the air compressor (2-2) and the double-fluid spray gun (2-1).
5. The high-temperature bypass evaporation device for treating desulfurization waste water according to claim 4, characterized in that: the two-fluid spray gun (2-1) is provided with three groups, and the two-fluid spray gun (2-1) is a single-hole type two-fluid spray gun.
6. The high-temperature bypass evaporation device for treating desulfurization waste water according to claim 4, characterized in that: the high-temperature bypass evaporation device is arranged between a boiler flue gas treatment device (7) and a desulfurization wastewater treatment device (8), the boiler flue gas treatment device (7) comprises a boiler flue (7-2), an air preheater (7-3), a dust remover (7-4), a desulfurization tower (7-5) and a chimney (7-6) which are sequentially connected through a first connecting flue (7-1) and are arranged at the tail end of a boiler, and an SCR flue gas denitration device (7-7) is arranged at the tail end of the boiler flue (7-2); the high-temperature flue gas inlet end (1-1) of the evaporation tower (1) is communicated with a first connecting flue (7-1) between a boiler flue (7-2) and an air preheater (7-3) through a second connecting flue (7-8), and the flue gas outlet end (1-2) of the evaporation tower (1) is communicated with the first connecting flue (7-1) between the air preheater (7-3) and a dust remover (7-4) through a third connecting flue (7-9); the second connecting flue (7-8) is provided with a regulating valve (7-8-1) and a first shutoff valve (7-8-2), the third connecting flue (7-9) is provided with a second shutoff valve (7-9-1), and an ash removal sampling hole (7-9-2) is formed in the elbow of the third connecting flue (7-9) close to one side of the evaporation tower (1);
the desulfurization wastewater treatment device (8) comprises a plate-and-frame filter press (8-1) and a triple-effect flash system (8-2), wherein a liquid inlet of the triple-effect flash system (8-2) is connected with a liquid outlet of a desulfurization tower (7-5) through a connecting pipeline, a liquid outlet of the triple-effect flash system (8-2) is connected with a liquid inlet of the plate-and-frame filter press (8-1) through a connecting pipeline, and a liquid outlet of the plate-and-frame filter press (8-1) is connected with a liquid inlet of a wastewater tank (2-4) through a connecting pipeline;
and a soot blower (7-10) is arranged on the third connecting flue (7-9), and the soot blower (7-10) is electrically connected with a control system.
7. The high-temperature bypass evaporation device for treating desulfurization waste water according to claim 6, characterized in that: the temperature monitoring system (5) comprises a first temperature transmitter (5-1) arranged on a second connecting flue (7-8), two groups of second temperature transmitters (5-2) arranged on a third connecting flue (7-9) and a plurality of groups of third temperature transmitters (5-3) arranged on the tower wall of the evaporation tower (1), wherein the plurality of groups of third temperature transmitters (5-3) are sequentially arranged on the tower wall of the evaporation tower (1) from top to bottom, the two groups of second temperature transmitters (5-2) are respectively and relatively arranged at the upper part and the lower part of the horizontally arranged third connecting flue (7-9), and the length of a temperature measuring point of the second temperature transmitter (5-2) arranged at the lower part extending into the flue is 20-30 mm.
8. The high-temperature bypass evaporation device for treating desulfurization waste water according to claim 1, characterized in that: the wall pasting air device (3) comprises an annular air box (3-1) fixedly sleeved on the outer side wall of the evaporation tower (1), the vertical section of the annular air box (3-1) is of an 'Contraband' shaped structure, the opening of the annular air box faces the evaporation tower (1), an air inlet (3-1-1) is formed in the outer side wall of the annular air box (3-1), the air inlet (3-1-1) is connected with an external air source through an air inlet pipe, the tower wall of the evaporation tower (1) where the upper top surface of the annular air box (3-1) is located is an annular upper tower wall (1-8), the tower wall of the evaporation tower (1) where the lower bottom surface of the annular air box (3-1) is located is an annular lower tower wall (1-9), and the top end of the annular lower tower wall (1-9) is sleeved at the bottom end of the annular upper tower wall (1-8), the outer diameter of the annular upper tower wall (1-8) is smaller than the inner diameter of the annular lower tower wall (1-9), and an adherent wind inlet gap (1-10) is arranged between the outer wall of the annular upper tower wall (1-8) and the inner wall of the annular lower tower wall (1-9).
9. The high-temperature bypass evaporation device for treating desulfurization waste water according to claim 8, characterized in that: paste wall wind device (3) and be provided with three groups, three groups paste wall wind device (3) from last to setting gradually down, paste evaporation tower (1) external diameter dimension of wall wind device (3) top is D, the superiors it is 3D to paste the height dimension between wall wind device (3) top surface to two fluid spray gun (2-1).
10. The high-temperature bypass evaporation device for treating desulfurization waste water according to claim 1, characterized in that: the rapping dust removal device group (4) is provided with four layers, the front three layers are arranged on an intermediate section (1-4) of the evaporation tower (1), the fourth layer is arranged on an outlet section (1-5) of the evaporation tower (1), the front three layers are arranged on the rapping dust removal device group (4) and comprise three groups of rapping dust removal devices (4-1) which are uniformly distributed and arranged along the circumferential direction of the outer wall of the evaporation tower (1), and the fourth layer is arranged on two groups of rapping dust removal devices (4-1) which are symmetrically arranged.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113860620A (en) * | 2021-11-15 | 2021-12-31 | 山西华仁通电力科技有限公司 | High-temperature bypass evaporation device for treating desulfurization wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113860620A (en) * | 2021-11-15 | 2021-12-31 | 山西华仁通电力科技有限公司 | High-temperature bypass evaporation device for treating desulfurization wastewater |
| CN113860620B (en) * | 2021-11-15 | 2024-05-24 | 山西华仁通电力科技股份有限公司 | High-temperature bypass evaporation device for treating desulfurization wastewater |
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Address after: Room 208, Building 1, No. 118, Wuluo Street, Tanghuai Industrial Park, Transformation and Comprehensive Reform Demonstration Zone, Taiyuan City, Shanxi Province, 030000 Patentee after: Shanxi Huarentong Electric Power Technology Co.,Ltd. Address before: 030000 room 208, building 1, No. 118, Wuluo street, Tanghuai Park, Taiyuan comprehensive reform demonstration zone, Taiyuan, Shanxi Province Patentee before: SHANXI HUARENTONG ELECTRICAL TECHNOLOGY CO.,LTD. |
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