CN-122015074-A - Device and method for continuous drainage, constant drainage and heat recovery of boiler

CN122015074ACN 122015074 ACN122015074 ACN 122015074ACN-122015074-A

Abstract

The invention relates to the field of continuous drainage, fixed drainage and heat recovery of boilers, and discloses a device and a method for continuous drainage, fixed drainage and heat recovery of boilers, wherein the device for continuous drainage, fixed drainage and heat recovery of boilers comprises a fixed drainage expansion vessel, the bottom of the fixed drainage expansion vessel is fixedly connected with a drain pipe, one side of a recovery water tank is provided with a recovery water pump, the output end of the recovery water pump is fixedly connected with an intermediate hot water tank, the output end of the hot water pump is fixedly connected with a high-temperature mixed bed, one side of the high-temperature mixed bed is fixedly connected with a high-temperature desalting water tank, one side of the high-temperature desalting water tank is provided with a high-temperature desalting water pump, and the output end of the high-temperature desalting water pump is fixedly connected with a deaerator I. The mixed wastewater enters a recovery water tank through a drain pipe, is pumped into an intermediate hot water tank through a recovery water pump after being combined, is purified through a high-temperature mixed bed, is buffered by a high-temperature desalting water tank, and is pumped to a deaerator I through a high-temperature desalting water pump, so that nearly 100% recovery of the hydrothermal environment is realized.

Inventors

WANG CHUNFU
LI CHUAN
ZHANG ZHI
ZHANG DAFENG
JIANG NENGCHENG
ZHOU YUE
Jia Guanpeng

Assignees

淄博齐翔腾达化工股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260302

Claims (10)

1. The utility model provides a device of boiler continuous drainage, fixed drainage and heat recovery, includes fixed row expansion vessel (1), continuous row expansion vessel (101) and recovery water tank (2), its characterized in that, the bottom fixedly connected with drain pipe (201) of fixed row expansion vessel (1), one end of drain pipe (201) is installed in recovery water tank (2), recovery water pump (202) are installed to one side of recovery water tank (2), the output fixedly connected with intermediate hot water tank (203) of recovery water pump (202), hot water pump (204) are installed to one side of intermediate hot water tank (203), the input fixedly connected with of hot water pump (204) is in one side of intermediate hot water tank (203), the output fixedly connected with high temperature mixed bed (205) of hot water pump (204), one side fixedly connected with high temperature desalination water tank (206) of high temperature desalination water tank (206), one side of high temperature desalination water tank (207) is installed, one side of high temperature desalination water tank (206) is installed to one side of high temperature desalination water pump (207), one side of high temperature desalination water tank (6) is installed to one side of high temperature desalination water tank (207), one side of high temperature desalination water tank (6) is installed to one side of high temperature desalination component (6).
2. The device for continuous drainage, fixed drainage and heat recovery of a boiler according to claim 1, wherein the fixed drainage waste water pipe (301) is fixedly connected to the middle part of the fixed drainage expansion vessel (1), and fixed drainage incoming water branch pipes (3) are uniformly and fixedly connected to the outer wall of the fixed drainage waste water pipe (301).
3. The device for continuous drainage, fixed drainage and heat recovery of a boiler according to claim 1, wherein a continuous drainage incoming water branch pipe (4) is fixedly connected to the middle of the continuous drainage expansion vessel (101), an exhaust pipe I (401) is fixedly connected to the top of the continuous drainage expansion vessel (101), a deaerator steam balance pipe (402) is fixedly connected to the top of the exhaust pipe I (401), a conveying pipe (404) is fixedly connected to the bottom of the continuous drainage expansion vessel (101), and a gas-liquid two-phase valve (403) is installed on the outer wall of the conveying pipe (404).
4. The device for continuous drainage, fixed drainage and heat recovery of a boiler according to claim 3, wherein one end of the conveying pipe (404) is provided with a continuous drainage and demineralized water heat exchanger (405), the outer wall of the continuous drainage and demineralized water heat exchanger (405) is provided with a first demineralized water pump (406), the output end of the first demineralized water pump (406) is fixedly connected in the continuous drainage and demineralized water heat exchanger (405), the outer wall of the continuous drainage and demineralized water heat exchanger (405) is provided with an output pipe (407), and one end of the output pipe (407) is fixedly connected with the water inlet end of the first deaerator (208).
5. The device for continuous drainage, fixed drainage and heat recovery of a boiler according to claim 4, wherein one side of the continuous drainage and demineralized water heat exchanger (405) is fixedly connected with a continuous drainage waste water pipe (5), one end of the continuous drainage waste water pipe (5) is fixedly connected to the middle part of the fixed drainage expansion vessel (1), and the outer wall of the continuous drainage waste water pipe (5) is fixedly connected with a boiler accident water pipe (501).
6. The device for continuous drainage, constant drainage and heat recovery of a boiler of claim 1, wherein the demineralized water spraying assembly (6) comprises an exhaust pipe II (601), the bottom of the exhaust pipe II (601) is fixedly connected to the top of a constant-row expansion vessel (1), the inner wall of the constant-row expansion vessel (1) is symmetrically and fixedly connected with a supporting frame (602), the inner wall of the supporting frame (602) is fixedly connected with a connecting pipe (603), the bottom of the connecting pipe (603) is rotationally connected with an annular pipe (604), and the bottom of the annular pipe (604) is uniformly and fixedly connected with a spray head (605).
7. The device for continuous water discharge, fixed water discharge and heat recovery of a boiler according to claim 6, wherein springs (7) are uniformly and fixedly connected to the top of the annular pipe (604), a cross (701) is fixedly connected to the top of each spring (7), and the inner wall of each cross (701) is fixedly connected to the outer wall of the connecting pipe (603).
8. The device for continuous drainage, constant drainage and heat recovery of boilers of claim 1 is characterized in that an installation frame (8) is installed on the outer wall of a constant-drainage expansion vessel (1), a driving motor (801) is installed at the top of the installation frame (8), a rotating shaft (802) is fixedly connected to the output end of the driving motor (801), a circular gear (803) is fixedly connected to the outer wall of the rotating shaft (802), a gear ring (804) is connected to the tooth end of the circular gear (803) in a meshed mode, the bottom of the gear ring (804) is rotatably connected to the inside of the constant-drainage expansion vessel (1), a connecting rod (805) is fixedly connected to the bottom of the gear ring (804), a mounting seat (806) is fixedly connected to the bottom of the connecting rod (805), a roller (807) is rotatably connected to the inside of the mounting seat (806), and the outer wall of the roller (807) is arranged at the top of an annular pipe (604).
9. The device for continuous drainage, constant drainage and heat recovery of a boiler according to claim 8, wherein a driving bevel gear (9) is fixedly connected to the bottom of the rotating shaft (802), a driven bevel gear (901) is connected to the tooth end of the driving bevel gear (9) in a meshed mode, a connecting shaft (902) is fixedly connected to the inner wall of the driven bevel gear (901), one end of the connecting shaft (902) is rotatably connected to the inside of the constant-row expansion vessel (1), and stirring blades (903) are uniformly and fixedly connected to the outer wall of the connecting shaft (902).
10. A method for continuously draining, fixedly draining and recovering heat of a boiler is characterized by being applied to the device for continuously draining, fixedly draining and recovering heat of a boiler according to any one of claims 1-9, and comprises the following steps: When in use, each path of constant drainage water of the boiler enters the constant-drainage expansion vessel (1) through the constant-drainage water branch pipe (3), and each path of continuous drainage water enters the continuous-drainage expansion vessel (101) through the continuous-drainage water branch pipe (4); The high-temperature steam enters a deaerator steam balance pipe (402) through an exhaust pipe I (401) to supply heat for the deaerator I (208), liquid wastewater enters a continuous drainage and demineralized water heat exchanger (405) through a gas-liquid two-phase valve (403), a demineralized water pump I (406) inputs normal-temperature demineralized water into a pipe side to exchange heat, and preheated demineralized water enters the deaerator I (208) through an output pipe (407); Outside desalted water enters the annular pipe (604) through the connecting pipe (603), is sprayed out by the spray head (605), and simultaneously starts the driving motor (801), so that the rotating shaft (802) drives the circular gear (803) to rotate, further, the gear ring (804) and the connecting rod (805) do circular motion, the roller (807) presses the annular pipe (604), and the spraying direction of the annular pipe (604) is changed under the cooperation of the spring (7); the rotating shaft (802) synchronously drives the driving bevel gear (9) to rotate so as to drive the driven bevel gear (901) and the connecting shaft (902) to rotate, so that the stirring blades (903) rotate to prolong the residence time of steam in the fixed-row expansion vessel (1), and the steam condenses and transfers heat; the mixed waste water of fixed row enters the recovery water tank (2) through the drain pipe (201), the waste water of continuous row cooling enters the fixed row expansion vessel (1) through the waste water pipe (5), after being combined, enters the middle hot water tank (203) through the recovery water pump (202), and is purified through the high-temperature mixed bed (205), buffered through the high-temperature desalting water tank (206) and conveyed to the deaerator I (208) through the high-temperature desalting water pump (207).

Description

Device and method for continuous drainage, constant drainage and heat recovery of boiler Technical Field The invention relates to the technical field of continuous drainage, fixed drainage and heat recovery of boilers, in particular to a device and a method for continuous drainage, fixed drainage and heat recovery of boilers. Background The boiler is core energy supply equipment of a thermal power plant, water quality in the boiler is kept stable through periodic drainage and continuous drainage in the operation process, the fixed drainage is boiler bottom wastewater which is periodically discharged, contains more scale impurities and is accompanied by a certain amount of high-temperature steam during discharge, and the continuous drainage is concentrated water at the middle upper part of the continuously discharged boiler, has lower impurity concentration, but has high water temperature, contains a large amount of waste heat and is easy to entrain a small amount of steam. The traditional fixed drainage and continuous drainage adopt direct external drainage, and the waste heat of the fixed drainage and the continuous drainage caused by the fact that the waste heat of the fixed drainage and the continuous drainage is not reasonably utilized, so that the waste of partial water resources and heat is caused. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a device and a method for continuous drainage, constant drainage and heat recovery of a boiler, which solve the problems that the waste heat of the constant drainage and the continuous drainage is not reasonably utilized and partial water resources and heat are wasted because the conventional constant drainage and continuous drainage adopt direct external drainage and the constant drainage and continuous drainage water and heat cannot be completely recovered. The boiler continuous drainage, fixed drainage and heat recovery device comprises a fixed drainage expansion vessel, a continuous drainage expansion vessel and a recovery water tank, wherein the bottom of the fixed drainage expansion vessel is fixedly connected with a drainage pipe, one end of the drainage pipe is installed in the recovery water tank, one side of the recovery water tank is provided with a recovery water pump, the output end of the recovery water pump is fixedly connected with a middle hot water tank, one side of the middle hot water tank is provided with a hot water pump, the input end of the hot water pump is fixedly connected to one side of the middle hot water tank, the output end of the hot water pump is fixedly connected with a high-temperature mixed bed, one side of the high-temperature mixed bed is fixedly connected with a high-temperature desalting water tank, one side of the high-temperature desalting water tank is provided with a high-temperature desalting water pump, one side of the high-temperature desalting water tank is fixedly connected with a deoxidizing device I, and the top of the fixed drainage expansion vessel is provided with a desalting water spraying component. By adopting the technical scheme, through the spraying operation of the demineralized water spraying assembly, the demineralized water is directly contacted with the high-temperature steam discharged in a fixed-row manner, the steam is rapidly condensed into liquid water when encountering cold, and the heat carried by the steam is synchronously transferred to the sprayed demineralized water, so that the temperature of the demineralized water is increased, the heat is prevented from being emptied along with the steam, and the recovery from the heat of the steam to the heat of spraying water is realized; The mixed wastewater formed in the fixed discharge expansion vessel comprises original fixed discharge wastewater, spray desalted water after absorbing heat and condensed steam water, also collected continuously discharged wastewater and boiler accident water, the wastewater is discharged into an underground recovery water tank through a drain pipe at the bottom of the fixed discharge expansion vessel, the wastewater is temporarily stored to balance water fluctuation of a subsequent treatment process, the mixed wastewater in the recovery water tank is pressurized by a recovery water pump and then enters an intermediate hot water tank for temporary storage, the high-temperature mixed bed and the high-temperature desalted water tank are sequentially introduced after stabilizing the water flow, the high-temperature mixed bed removes calcium, magnesium, chlorine and other impurity ions in the wastewater, the impurities are prevented from entering a boiler to cause scaling and corrosion, the water quality reaches the boiler water supply standard, purified qualified water is pressurized and conveyed to the deaerator I through a high-temperature desalted water pump after being buffered and stabilized, and then is supplied back to the boiler again after being mixed with other qual