CN218763319U - Multi-input efficient continuous-discharge capacity expansion device for flash boiler - Google Patents
Multi-input efficient continuous-discharge capacity expansion device for flash boiler Download PDFInfo
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- CN218763319U CN218763319U CN202223078536.4U CN202223078536U CN218763319U CN 218763319 U CN218763319 U CN 218763319U CN 202223078536 U CN202223078536 U CN 202223078536U CN 218763319 U CN218763319 U CN 218763319U
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Abstract
The utility model discloses a high-efficient flash boiler of many inputs is row expansion device even, including the flash vessel body, even arrange the waste water input tube, even arrange the inside flash tube of waste water, even arrange flash steam output tube, even arrange flash water discharge port, flash port and go up baffle and flash port lower baffle. The utility model discloses a continuous row's flash chamber can not only provide a plurality of inputs, and can establish the water level before the delivery. The flash evaporation can be rapidly carried out through the annular flash evaporation pipe inside the continuous-discharge wastewater, and the noise can be reduced through the jet orifice with a small aperture. The water level can be stabilized and the water content of saturated steam can be reduced by arranging the upper partition plate and the lower partition plate of the flash evaporation port; the utility model discloses can stably export the saturated steam of selected pressure, can improve working medium, thermal utilization efficiency, provide the condition for even arranging waste water working medium, heat full utilization.
Description
Technical Field
The utility model relates to a boiler waste heat recovery technical field, concretely relates to high-efficient flash boiler of multiple input is row expansion device even.
Background
At present, the known boiler continuous-discharge wastewater expansion device is matched with the operation of a unit boiler, a single input end is configured, and the simplest small-hole injection port is configured in an expansion tank. The device has the problems of high investment difficulty, low utilization rate of output saturated steam and the like.
Specifically, the current boiler continuous-exhaust system is set by a unit system, namely, each boiler is provided with a set of boiler continuous-exhaust flash tank, and the boiler continuous-exhaust flash tank has the advantage of being started along with the unit boiler. Take a 330MW subcritical unit as an example, a 3.5m unit is matched 3 And the continuous discharge flash tank is designed to input continuous discharge wastewater quantity of 5-20t/h. In actual operation, each plant strictly executes chemical supervision, and the water quality index is better ensured, so that the continuous discharge wastewater discharge amount is less than 5t/h under normal conditions, even is only about 3t/h generally. Therefore, under the condition that the boiler water quality is well guaranteed, the flow is less than the design minimum flow, the water level of the flash tank is difficult to establish, and the liquid level control is difficult.
In terms of actual analysis, even if the continuous-discharge system of the boiler is normally put into use, because the flash steam of the continuous-discharge wastewater in the continuous-discharge flash tank is saturated steam and contains a certain amount of water drops, the steam contains impurities far larger than the steam in the steam turbine, and the steam enters the system from the deaerator of the unit, so that the actual secondary pollution to the steam system is caused, and the continuous-discharge capacity of the boiler is increased to a certain extent.
The current continuous-row system is designed in such a way that flash steam can enter the deaerator from the continuous-row flash tank only after the pressure is larger than the pressure of the deaerator, and can not be directly used as other low-pressure steam sources, so that the heat effective utilization rate is low.
One of the existing continuous-discharge flash tank is horizontally communicated to the opposite side from an external continuous-discharge pipe and is fixed, and a flash opening is arranged on the pipe body of the internal continuous-discharge pipe. The other is that the flash evaporation device extends upwards vertically after passing from an external connecting drain pipe to the middle of the flash tank, and the flash evaporation ports are arranged on the horizontal section and the vertical section. In this kind of structure, the flash distillation mouth aperture of even drain pipe is > 3mm, has the great problem of noise, and the side direction flash distillation mouth has certain washing away to the lateral wall, and the flash distillation mouth that makes progress easily causes soda to take water, and the flash distillation mouth that makes progress can cause the water level fluctuation.
In actual operation, when a plurality of units are put into continuous drainage, the continuous drainage system is flushed firstly, and then the continuous drainage flash tank-fixed drainage flash tank valve is closed to carry out pressure building and water storage. The problem that the water storage is difficult due to the fact that leakage and flash evaporation water quantity are low in the process of adjusting the valve exists, and the water-vapor mixture is difficult to put into due to the fact that vibration and the like are caused through the pipeline.
In addition, the single-path input is not beneficial to converting multi-path continuous drainage wastewater into a single steam source for supplying steam to the outside.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-efficient flash boiler of multiple input is row expansion device even not enough to prior art.
In order to realize the purpose, the utility model adopts the following technical scheme:
a multi-input efficient flash boiler continuous-discharge capacity expansion device comprises a capacity expansion device body, a continuous-discharge wastewater input pipe, a continuous-discharge wastewater internal flash pipe, a continuous-discharge flash steam output pipe, a continuous-discharge flash water discharge port, a flash port upper partition plate and a flash port lower partition plate;
the front side, the rear side, the left side and the right side of the flash tank body are respectively provided with at least one continuous waste water input pipe, and the inlet of each continuous waste water input pipe is connected with a one-way valve I; the continuous drainage wastewater input pipe is perpendicular to the flash tank body, extends into the flash tank body and is connected with a continuous drainage wastewater internal flash pipe; the internal flash evaporation pipe of the continuous drainage wastewater is annular and is arranged around the inside of the flash tank body; the bottom of the part of the continuous waste water input pipe inside the flash evaporation pipe and the bottom of the part of the continuous waste water input pipe inside the flash evaporator body are both provided with small-hole injection ports;
the upper flash opening partition plate and the lower flash opening partition plate are respectively positioned above and below the flash pipe in the continuous waste water discharge and are annular, and the areas of the upper flash opening partition plate and the lower flash opening partition plate can cover the upper part and the lower part of the flash pipe in the continuous waste water discharge;
the continuous-discharge flash steam output pipe is positioned in the center of the top of the flash tank body, and the outlet of the continuous-discharge flash steam output pipe is provided with a second check valve;
the continuous-drainage flash water discharge port is positioned at the bottom of the flash tank body and is connected with an adjusting valve or a pipeline pump for controlling the liquid level.
Furthermore, the inner diameter of the small-hole injection ports is less than or equal to 3mm, and the total area of all the small-hole injection ports is more than 3 times of the radial cross section area of the single continuous waste water input pipe.
Furthermore, the inside flash distillation pipe of continuous waste water is the square ring form, and its four corners is the fillet.
Furthermore, the pipe diameter of the flash evaporation pipe in the continuous waste water discharge is not less than that of the continuous waste water discharge input pipe.
Further, the continuous-discharge flash steam output pipe is connected to a flash steam external steam supply system through an output pipeline, and an external steam supply pressure measuring point and an external steam supply temperature measuring point are arranged on the output pipeline; and a body pressure monitoring point is arranged at the upper part of the flash tank body.
Furthermore, the outer side of the upper part of the flash tank body is connected with a safety valve.
Furthermore, a steam-water separator is arranged at the top of the interior of the flash tank body.
Furthermore, a pre-replenishing water level interface is arranged on the outer side of the lower portion of the flash tank body and is connected to a lower port of a remote transmission water level meter through a tee joint, and the remote transmission water level meter is arranged on the outer side of the lower portion of the flash tank body.
Furthermore, a manhole is further arranged on the outer side of the upper portion of the flash tank body.
Furthermore, the outer side of the lower part of the flash tank body is also provided with a local liquid level meter.
The beneficial effects of the utility model reside in that:
1. the utility model discloses a multichannel input realizes that a flash tank can input the multichannel and even arranges waste water to can satisfy the requirement of many inputs, single output steam, do benefit to even arrange waste water working medium, thermal full utilization. When the single-path continuous-discharge wastewater quantity is less than a design value, the quantity of water entering the continuous-discharge flash tank can be increased, the continuous-discharge water level is easier to establish, and the internal pressure of the continuous-discharge flash tank is improved, so that saturated steam can be delivered outwards.
2. The utility model provides a single pass saturated steam output can satisfy the requirement of single pass saturated vapour cooperation external steam supply, can self-adaptation provide 0.1-1.1 MPa's saturated steam be used for external industry vapour, or as the partial vapour source etc. that supply vapour to external industry, improves heat utilization simultaneously and retrieves partial working medium by a wide margin.
3. The utility model discloses an adopt the injection aperture and the upper and lower baffle of annular flash distillation pipe, aperture, can realize that high temperature high pressure even arranges waste water and gets into even arranging back quick flash distillation and realize making an uproar, reinforcing jet stability. The upper partition plate has a certain steam-water separation function, has a better steam-water separation effect by combining with the top steam-water separator, and can reduce the pressure of the upper steam-water separator after being sprayed downwards; the lower baffle can eliminate disturbance to the water level of the flash tank during spraying.
4. The utility model discloses increase the check valve before getting into the flash tank body that is even arranged at the input of four ways waste water, mutual interference and the soda reverse flow problem that can avoid four ways to get into.
5. The utility model discloses an increase outside moisturizing interface, can realize setting up the water level before the device drops into, avoid setting up the loss during the water level and wait for the water level to set up time.
6. The utility model discloses an increase temperature and pressure measurement station on the flash distillation vapour output pipeline, can realize the monitoring of the parameter of external confession vapour, judge whether output saturated steam is normal, leak in having or not check valve and the stop valve, avoid the anti-vapour problem.
Drawings
Fig. 1 is a schematic front view of a capacity expansion device according to embodiment 1 of the present invention;
fig. 2 is a bottom sectional view of the inside of the flash tank body according to embodiment 1 of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the present embodiment is based on the technical solution, and the detailed embodiments and the specific operation processes are provided, but the protection scope of the present invention is not limited to the present embodiment.
Example 1
The embodiment provides a high-efficient flash boiler of multiple input is arranged expanding device even, as shown in fig. 1, fig. 2, including flash vessel body 1, even arrange waste water input pipe 2, even arrange inside flash tube 3 of waste water, even arrange flash steam output tube 4, even arrange flash water discharge port 5, flash mouth upper baffle 6 and flash mouth lower baffle 7.
The front side, the rear side, the left side and the right side of the flash tank body 1 are respectively provided with at least one continuous waste water input pipe 2, and the inlet of each continuous waste water input pipe 2 is connected with a one-way valve I8. The continuous waste water discharge input pipe 2 is perpendicular to the flash tank body 1, extends into the flash tank body 1 and is connected with a continuous waste water discharge internal flash evaporation pipe 3; the internal flash evaporation pipe 3 of the continuous drainage wastewater is annular and is arranged around the inside of the flash tank body 1; the bottom of the part of the continuous waste water input pipe 2 inside the flash evaporation pipe 3 and the bottom of the part of the continuous waste water input pipe 2 inside the flash evaporator body 1 are both provided with small-hole injection ports 20.
In the present embodiment, the inner diameter of the small-hole injection ports 20 is less than or equal to 3mm, and the total area of all the small-hole injection ports 20 is more than 3 times the radial cross-sectional area of the single continuous waste water input pipe 2.
In this embodiment, the flash evaporation pipe 3 inside the continuous wastewater discharge is in a square ring shape, and four corners of the flash evaporation pipe are rounded corners.
In the embodiment, the pipe diameter of the flash evaporation pipe 3 in the continuous waste water discharge is not less than that of the continuous waste water discharge input pipe 2.
Specifically, the four corners of the flash evaporation pipe 3 inside the continuous waste water discharge are provided with clamps and supports for fixing the flash evaporation pipe with the inner wall of the flash tank body 1.
The upper flash opening partition plate 6 and the lower flash opening partition plate 7 are respectively positioned above and below the continuous waste water internal flash pipe 3 and are annular, and the areas of the upper flash opening partition plate and the lower flash opening partition plate can cover the upper part and the lower part of the continuous waste water internal flash pipe 3.
The continuous-discharge flash steam output pipe 4 is positioned in the center of the top of the flash tank body 1, the outlet of the continuous-discharge flash steam output pipe is provided with a second check valve 10 and is connected to a flash steam external steam supply system 11 through an output pipeline, and the output pipeline is provided with an external steam supply pressure measuring point 16 and an external steam supply temperature measuring point 17; and a body pressure monitoring point 9 is arranged at the upper part of the flash tank body 1.
The continuous-discharge flash water discharge port 5 is positioned in the center of the bottom of the flash tank body 1, is connected with a regulating valve or a pipeline pump for controlling the liquid level, and is connected with a heat supply network or other systems needing heating at the output terminal.
In this embodiment, a safety valve 12 is connected to an upper outer side of the flash tank body 1, and a pressure setting of the safety valve 12 needs to be determined according to a parameter of the steam external supply system 11.
In this embodiment, a steam-water separator 13 is disposed at the top of the interior of the flash tank body 1. Specifically, the steam-water separator 13 adopts a louver structure. In addition, the upper baffle 6 of the flash evaporation opening also has a certain steam-water separation function.
In this embodiment, a pre-water level interface 14 is provided on the outer side of the lower portion of the flash tank body 1, and is connected to the lower port of the remote water level meter 18 by a tee joint, so that the flash tank can be replenished with demineralized water, soft water and the like before being put into the system to establish a water level, and the system is easy to put into operation.
In this embodiment, the remote water level meter 18 is disposed at the outer side of the lower portion of the flash tank body 1, and is used for remote monitoring of the water level by the DCS system.
In this embodiment, a manhole 15 is further disposed on an outer side of an upper portion of the flash tank body 1, and the manhole 15 may serve as an inlet of the flash tank body during maintenance.
In this embodiment, the outer side of the lower portion of the flash tank body 1 is further provided with an in-situ liquid level meter 19, so that the inspection of the water level during the field inspection is facilitated.
The multi-input efficient flash evaporation boiler continuous-discharge capacity expansion device in the embodiment is mainly applied to occasions with multi-path continuous-discharge wastewater capable of being input and only one steam external steam supply system. Normally, no less than two water sources are used, and the water source can be modified or newly built at a selected position. The supplied saturated steam pressure is determined by external steam supply parameters, and is currently designed to be 0.1-1.1MPa according to the continuous emission standard.
Example 2
A certain thermal power plant is a 4 x 330MW heat supply and external industrial steam supply unit, a continuous waste water discharge system is in unit arrangement, and the flow is designed to be 5-20t/h. At present, each continuous drainage system is about 2t/h per hour, the continuous drainage system cannot be normally put into operation, and therefore continuous drainage wastewater is directly discharged to a fixed drainage flash tank, and a large amount of working media and heat are lost. According to 4 multiplied by 2t/h, the pressure of a steam drum boiler is 17.5MPa (saturation water enthalpy value is 1710.76 kj/kg), and the annual operation hour 8000: loss of working fluid =4 × 2 × 8000=6.4 ten thousand t; heat loss =4 × 2 × 8000 × 1710.76=10.95 ten thousand GJ, corresponding to standard coal 3733.6t.
The multi-input efficient flash boiler continuous-discharge capacity expansion device in the embodiment 1 is newly built, and the total flow of the continuous-discharge wastewater input pipe 2 of the four-way continuous-discharge wastewater access device is 8t/h and is within the design range of 5-20t/h. And a pre-replenishing water level interface 14 is adopted to replenish the water level in the flash tank body 1 to a normal water level. Gradually opening a one-way valve I8 at the inlet of the continuous waste water input pipe 2, and injecting the continuous waste water through a small-hole injection port at the bottom after the continuous waste water enters a flash evaporation pipe 3 in the continuous waste water; the lower clapboard 7 of the flash opening prevents the air flow of the jet opening from influencing the lower water level; the flash evaporation port upper baffle 6 partially blocks flash evaporation steam and plays a role in assisting steam-water separation. The flash steam continuously rises, is separated again through the steam-water separator 13, and is externally provided with saturated steam through the continuous discharge flash steam output pipe 4 and the check valve II 10. The external industrial steam supply pressure of the embodiment is 0.8MPa, and the device can automatically generate saturated steam which is more than or equal to 0.8MPa as a supplementary steam source of industrial steam supply.
After four ways are even arranged and are intake, the liquid level inside the flash tank body 1 begins to rise, and the excess water quantity needs to be discharged through the regulating valve connected with the even-discharge flash water discharge port 5, so that the normal water level is maintained. The excess water enters the heat supply network water return main pipe in winter and enters the raw water pool in summer. The pressure of the water side outlet is equal to the saturated vapor pressure and is 0.8MPa, and the pressure of the heat supply network backwater main pipe is 0.5MPa, so that the water can normally enter the heat supply network; and the waste water enters a raw water tank in summer, the pressure at the position is 0.1MPa of the normal pressure, and the position adopts an underwater discharge design.
After the transformation, only one saturated steam output port is arranged, and the external connection is easy; the water side also has only one drainage outlet. After flash evaporation, the quality of saturated steam is slightly reduced, and the influence of the saturated steam on external steam supply needs to be considered; the discharge of the continuous drainage wastewater after the transformation can be kept unchanged.
Example 3
In certain alumina plant, 2X 410t/h fluidized bed and 2 50MW back pressure units are set, and high pressure steam supply of 170t/h (8.5 MPa, 320 ℃) and low pressure steam supply of 300t/h (0.6 MPa, 260 ℃) are carried out. The two furnaces are provided with unit continuous-discharge capacity-expanding systems, and actual continuous-discharge wastewater is directly introduced into an alumina industrial mixed heat exchange system to heat red mud washing water. The total amount of the continuous wastewater is about 10t/h and the single unit is 5t/h under the influence of the quality of the alumina backwater. The factory is technically improved, the waste heat of the alumina roasting smoke is recycled, continuous waste water is not needed for heat exchange with red mud washing water, and the waste heat and working media of the part are required to be recycled. According to the drum pressure of 10MPa (the enthalpy value of saturated water is 1407.87 kj/kg), the annual operation hour 8000: loss of working fluid =2 × 5 × 8000=8 ten thousand t; heat loss =2 × 5 × 8000 × 1407.87=11.263 ten thousand GJ, corresponding to 3840.7t of standard coal.
The multi-input efficient flash boiler continuous-discharge capacity expansion device described in embodiment 1 is newly built, and the total flow of two continuous-discharge wastewater input pipes 2 (such as the continuous-discharge wastewater input pipes 2 on the left side, the right side, the front side and the rear side) which are oppositely arranged by the two-way continuous-discharge wastewater access device is 10t/h and is within the design range of 5-20t/h. A pre-replenishing water level interface 14 is adopted to replenish the water level in the flash tank body 1 to a normal water level; gradually opening a one-way valve I8 corresponding to the connected continuous waste water input pipe 2, and injecting the continuous waste water through a small-hole injection port at the bottom after the continuous waste water enters a flash evaporation pipe 3 in the continuous waste water; the lower clapboard 7 of the flash opening prevents the air flow of the jet opening from influencing the lower water level; the flash evaporation port upper baffle 6 partially blocks flash evaporation steam and plays a role in assisting steam-water separation. The flash steam continuously rises, is separated again through the steam-water separator 13, and is externally provided with saturated steam through the continuous discharge flash steam output pipe 4 and the check valve II 10. The external industrial steam supply pressure of the embodiment is 0.6MPa, and the device can automatically generate saturated steam which is more than or equal to 0.6MPa as a supplementary steam source of industrial steam supply.
After the two paths of continuous drainage water inlet, the liquid level of the flash tank body 1 begins to rise, and the excess water is discharged through a regulating valve arranged outside the continuous drainage flash water discharge port 5 to maintain the normal water level. The water side enters a heat supply network backwater main pipe in winter and enters a raw water pool in summer. The pressure of the water side outlet is equal to the saturated vapor pressure and is 0.6MPa, and the pressure of the heat supply network backwater main pipe is 0.5MPa, so that the water can normally enter the heat supply network; and the waste water enters a raw water pool in summer, the pressure at the position is 0.1MPa at normal pressure, and the position adopts an underwater discharge design.
Various corresponding changes and modifications can be made by those skilled in the art according to the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (10)
1. A multi-input efficient flash boiler continuous-discharge capacity expansion device is characterized by comprising a capacity expansion device body, a continuous-discharge wastewater input pipe, a continuous-discharge wastewater internal flash pipe, a continuous-discharge flash steam output pipe, a continuous-discharge flash water discharge port, a flash port upper partition plate and a flash port lower partition plate;
the front side, the rear side, the left side and the right side of the flash tank body are respectively provided with at least one continuous waste water input pipe, and the inlet of each continuous waste water input pipe is connected with a one-way valve I; the continuous waste water input pipe is vertical to the flash tank body, extends into the flash tank body and is connected with a continuous waste water internal flash evaporation pipe; the internal flash evaporation pipe of the continuous drainage wastewater is annular and is arranged around the inside of the flash tank body; the bottom of the part of the continuous waste water input pipe inside the flash evaporation pipe and the bottom of the continuous waste water input pipe inside the flash evaporator body are both provided with small-hole injection ports;
the upper flash opening partition plate and the lower flash opening partition plate are respectively positioned above and below the flash pipe in the continuous waste water discharge and are annular, and the areas of the upper flash opening partition plate and the lower flash opening partition plate can cover the upper part and the lower part of the flash pipe in the continuous waste water discharge;
the continuous-discharge flash steam output pipe is positioned in the center of the top of the flash tank body, and the outlet of the continuous-discharge flash steam output pipe is provided with a second check valve;
the continuous-discharge flash water discharge port is positioned at the bottom of the flash tank body and is connected with an adjusting valve or a pipeline pump for controlling the liquid level.
2. The apparatus of claim 1, wherein the orifice jets have an internal diameter of less than or equal to 3mm, and the total area of all orifice jets is greater than 3 times the radial cross-sectional area of a single continuous waste input pipe.
3. The apparatus of claim 1, wherein the internal flash pipe for continuous wastewater discharge is in the shape of a square ring with rounded corners.
4. The device as claimed in claim 1, wherein the pipe diameter of the flash pipe inside the continuous waste water discharge pipe is larger than or equal to that of the continuous waste water discharge input pipe.
5. The device according to claim 1, wherein the continuous-discharge flash steam output pipe is connected to a flash steam external steam supply system through an output pipeline, and an external steam supply pressure measuring point and an external steam supply temperature measuring point are arranged on the output pipeline; and a body pressure monitoring point is arranged at the upper part of the flash tank body.
6. The apparatus of claim 1, wherein a relief valve is connected to an upper exterior side of the flash tank body.
7. The device of claim 1, wherein a steam-water separator is disposed at the top of the interior of the flash tank body.
8. The apparatus of claim 1, wherein the flash tank body is provided with a pre-replenishing water level port at an outer side of a lower portion thereof, and the pre-replenishing water level port is connected to a lower port of a remote water level meter by a tee joint, and the remote water level meter is provided at an outer side of a lower portion of the flash tank body.
9. The apparatus of claim 1, wherein a manhole is further provided outside an upper portion of the flash tank body.
10. The apparatus of claim 1, wherein an in-situ liquid level gauge is further provided outside the lower portion of the flash tank body.
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| CN202223078536.4U CN218763319U (en) | 2022-11-21 | 2022-11-21 | Multi-input efficient continuous-discharge capacity expansion device for flash boiler |
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| CN202223078536.4U CN218763319U (en) | 2022-11-21 | 2022-11-21 | Multi-input efficient continuous-discharge capacity expansion device for flash boiler |
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