CN210891717U

CN210891717U - Boiler bottom slag cooling water balance system

Info

Publication number: CN210891717U
Application number: CN201921753687.0U
Authority: CN
Inventors: 马毅
Original assignee: Qingdao Ruichen Power Environmental Protection Equipment Co ltd
Current assignee: Qingdao Ruichen Power Environmental Protection Equipment Co ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-06-30
Anticipated expiration: 2029-10-18

Abstract

The utility model discloses a sediment cooling water balance system at bottom of boiler, including installing mechanical seal and temperature the control unit, the water level the control unit on dragveyer basin, the first water inlet of dragveyer basin passes through the first delivery port of pipe connection cooling water pool, and the first delivery port of cooling water pool passes through another way pipe connection water curtain wall device import, and the second import of water curtain wall device exit linkage cooling water pool, the delivery port of delivery port, dragveyer basin in water seal groove and the second import intercommunication in cooling water pool, the second delivery port of cooling water pool passes through the pipeline and is connected with the second water inlet in dragveyer basin. The utility model discloses need not to carry out whole transformation to original dragveyer cooling water system, only need carry out equipment additional installation, change such as heat exchanger, water seal system, consequently, can reduce the popularization and the application effect of dragveyer cooling water zero overflow system by a wide margin.

Description

Boiler bottom slag cooling water balance system

Technical Field

The utility model belongs to boiler auxiliary engine field relates to sediment cooling water system's performance improvement at the bottom, especially relates to sediment cooling water balance system at the bottom of the boiler.

Background

At present, the wet slag removal system of the coal-fired power plant, also can be called as a slag conveyor system for short, because the bottom slag of the boiler of the thermal power plant still has higher temperature, in order to ensure the safety and improve the treatment efficiency, the wet slag removal system usually adopts the steps of firstly cooling by water and then collecting and removing by using a scraper slag conveyor. To conserve water usage, dragger systems typically require zero-spill operation of the cooling water.

A large amount of plate type or tube type heat exchangers are adopted in the existing slag conveyor system to carry out heat exchange of cold and hot water in the system so as to reduce the consumption of slag water at the bottom of a cooling boiler. The plate-type or tube-type heat exchanger is adopted for heat exchange, equipment transformation needs to be carried out on the existing slag conveyor system, the manufacturing cost is relatively high, meanwhile, cooling water needs to be greatly increased, the load of the original cooling water system is increased, and the operation cost is increased. The prior slag conveyor cooling water zero-overflow system based on the heat exchanger still has the defects of high manufacturing cost, heat exchanger plate blockage, water seal tank ash accumulation plate hardening, high operation cost and the like.

For example, a Chinese patent (publication No. CN105042606B) discloses a self-balancing method for cooling water of a slag conveyor, wherein a first water inlet pipe is arranged above the slag conveyor, the first water inlet pipe is provided with a first water inlet valve with adjustable opening degree, the slag conveyor is provided with an overflow port, a slag water adjusting pool communicated with the overflow port is arranged below the slag conveyor, and a first conveying pipeline is arranged between the slag water adjusting pool and the slag conveyor; the self-balancing method of the cooling water of the slag conveyor comprises the following steps: the cooling water consumption of the slag conveyor is counted, and the water replenishing quantity of the slag conveyor is calculated according to the consumption; setting the opening degree of the first water inlet valve according to the water supplement amount, balancing the water supplement amount and the consumption amount of the slag conveyor in normal operation, and maintaining the water level in the slag conveyor at an overflow port; opening the first water inlet valve; the slag water adjusting tank collects slag water overflowing from the slag conveyor and conveys the slag water back to the slag conveyor through the first conveying pipeline for slag water circulation.

As the Chinese patent (No. CN208124329U), the invention discloses a slag water zero overflow system of a slag removal system of a thermal power plant, wherein each slag water cooler is positioned in a scraper slag conveyor shell, the water outlet of a cooling water pump is communicated with the inlet of each slag water cooler through a cooler water inlet main pipe, the outlet of each slag water cooler is communicated with a cooler water return main pipe, a high water level liquid level meter, a low water level liquid level meter and a thermometer are arranged in the scraper slag conveyor shell, wherein the output end of the high water level liquid level meter and the output end of the low water level liquid level meter are communicated with the input end of a liquid level control system, the output end of the liquid level control system is connected with the control end of a water replenishing pump, the water outlet of the water replenishing pump is communicated with the water replenishing port of the scraper slag conveyor shell, the output end of the thermometer is communicated with the input end of a temperature control system, and the output, this system can realize the zero overflow of deslagging system, is showing the moisturizing volume that reduces thermal power plant's deslagging system simultaneously.

Although the slag water zero-overflow system of the slag removal system is improved in effect, the problems of blockage and hardening of heat exchange equipment and a water seal tank of cooling water are not solved, and therefore operation and maintenance of the system are not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an adopt water curtain wall device technique to carry out the boiler bottom sediment cooling water balance system of heat transfer for solve the jam of zero overflow system indirect heating equipment of dragveyer and water seal tank among the prior art, harden the problem.

In order to realize the utility model discloses an aim at, adopt following technical scheme:

slag cooling water balance system at bottom of boiler, including installing water seal groove and temperature control unit, the water level control unit on the dragveyer basin, the first water inlet of dragveyer basin passes through the first delivery port of pipe connection cooling water pool, and the first delivery port of cooling water pool passes through another way pipe connection water curtain import, and the second import of water curtain exit linkage cooling water pool, the delivery port of water seal groove, dragveyer basin and cooling water pool's second import intercommunication, the second delivery port of cooling water pool passes through the pipeline and is connected with the second water inlet of dragveyer basin.

In order to further improve the utility model discloses an effect can also adopt following technical scheme:

according to the boiler bottom slag cooling water balance system, the water temperature control unit comprises a temperature sensor, the signal output end of the temperature sensor is connected with the signal input end of the variable frequency water pump, and the variable frequency water pump is arranged on a pipeline from the first water outlet of the cooling water pool to the first water inlet of the water tank of the slag conveyor.

According to the boiler bottom slag cooling water balance system, the water level control unit comprises the liquid level sensor, the signal output end of the liquid level sensor is connected with the signal input end of the overflow water pump, and the overflow water pump is arranged on a pipeline between the water outlet of the slag conveyor water tank and the second inlet of the cooling water tank.

According to the boiler bottom slag cooling water balance system, the ceramic fiber cloth used for filtering ash is arranged in the water seal tank.

The boiler bottom slag cooling water balance system is characterized in that a filtering and purifying device is arranged below the water seal tank, the filtration purification device includes the purifying tank, purifying tank bottom sets up first swash plate and second swash plate, first swash plate top is connected with second swash plate top, first swash plate and second swash plate top junction are connected with the overflow board, the overflow board separates into rose chamber and water purification chamber with the purifying tank, first swash plate upper portion and first drain pipe intercommunication, set up first drain valve on the first drain pipe, second swash plate upper portion and second drain pipe intercommunication, set up the second drain valve on the second drain pipe, the purifying tank is close to the lateral wall of first swash plate lower extreme and sets up first manhole, the purifying tank is close to the lateral wall of second swash plate lower extreme and sets up the second manhole, set up the inlet tube in the rose chamber, set up the outlet pipe in the water purification intracavity, install the circulating pump on the outlet pipe, inlet tube and outlet pipe all communicate with the water seal groove.

According to the boiler bottom slag cooling water balance system, the filter cavity is internally provided with the flow stabilizing net which is vertically arranged in the middle of the overflow plate.

According to the boiler bottom slag cooling water balance system, the included angle formed by the first inclined plate and the second inclined plate is 90 degrees, and the first inclined plate and the second inclined plate are both provided with the vibrators.

Compared with the prior art, the beneficial effects of the utility model are that:

1. adopt water curtain wall device convection device heat transfer, solve the easy problem that hardens of plate-type or tubular heat exchanger, heat exchange efficiency is lower, needs a large amount of cooling water, adopt the water seal groove to replace water seal system, solve the water seal groove easily harden, the deposition, damage the defect of boiler water seal picture peg.

2. The utility model discloses need not to carry out whole transformation to original dragveyer cooling water system, only need carry out equipment additional installation, change such as heat exchanger, water seal system, consequently, can reduce the popularization and the application effect of dragveyer cooling water zero overflow system by a wide margin.

3. The arranged filtering and purifying device recycles the impurities carried in the water discharged by the water seal tank, thereby reducing the waste of water resources, lowering the production cost of enterprises and reducing the pollution caused by the environment; impurity can be followed the swash plate and constantly to population department flow, and the staff need not get into in the purifying tank just can be convenient clearance impurity, is favorable to reducing staff's intensity of labour when clearing up impurity, improves work efficiency etc..

4. The utility model discloses the advantage that still has the succinct compactness of structure, low in manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic diagram of the results of the filtration purification apparatus described in FIG. 1;

fig. 3 is a sectional view taken along line a-a of fig. 2.

Reference numerals: 1-a slag salvaging machine water tank, 2-a water seal tank, 3-a water temperature control unit, 4-a water level control unit, 5-a cooling water tank, 6-a water curtain wall device, 7-a purification tank, 8-a first inclined plate, 9-a second inclined plate, 10-an overflow plate, 11-a filter cavity, 12-a water purification cavity, 13-a first drain pipe, 14-a second drain pipe, 15-a water inlet pipe, 16-a water outlet pipe, 17-a circulating pump and 18-a flow stabilizing net.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the slag cooling water balance system at the bottom of the boiler disclosed in this embodiment includes a water seal tank 2 and a water temperature control unit 3 installed on a water tank 1 of the slag conveyor, a water level control unit 4, and a control valve on a pipeline, and a water curtain wall device 6 is arranged outside the slag conveyor, and the water temperature is reduced by utilizing the combination of the increased heat exchange area and the convection heat dissipation, and the amount of cooling water is also better reduced.

A first water inlet of the water tank 1 of the slag conveyor is connected with a first water outlet of the cooling water tank 5 through a pipeline, a first water outlet of the cooling water tank 5 is connected with an inlet of a water curtain wall device 6 through another pipeline, and an outlet of the water curtain wall device 6 is connected with a second inlet of the cooling water tank 5. The water outlet of the water seal tank 2 and the water outlet of the slag conveyor water tank 1 are communicated with a second inlet of the cooling water tank 5, and a second water outlet of the cooling water tank 5 is connected with a second water inlet of the slag conveyor water tank 1 through a pipeline. Namely, the temperature of water in the water tank 1 of the slag conveyor is increased after the temperature of the water is reduced to the set drainage temperature, a valve on a pipeline between a water outlet of the corresponding water tank 1 of the slag conveyor and a second inlet of the cooling water tank 5 is opened, the water tank 1 of the slag conveyor drains water outwards and is filtered and cooled in the cooling water tank 5, and then the water is pumped by a water pump from a first water outlet of the cooling water tank 5 and is respectively sent to a water curtain wall device 6 for cooling and the water is replenished in the water tank 1 of the slag conveyor; the cooling water cooled by the water curtain wall device 6 is returned to the cooling water tank 5 to adjust the water temperature in the cooling water tank 5 and temporarily store the cooling water.

As shown in fig. 1, the water seal tank 2 of this embodiment is made of ceramic fiber cloth for filtering slag. The water temperature control unit 3 comprises a temperature sensor, the signal output end of the temperature sensor is connected with the signal input end of a variable frequency water pump, and the variable frequency water pump is arranged on a pipeline between a first water outlet of the cooling water pool 5 and a first water inlet of the water tank 1 of the slag conveyor. The water level control unit 4 comprises a liquid level sensor, the signal output end of the liquid level sensor is connected with the signal input end of an overflow water pump, and the overflow water pump is arranged on a pipeline between the water outlet of the slag conveyor water tank 1 and the second inlet of the cooling water pool 5.

Adopt 6 convection current devices heat transfer of water curtain wall device, solve the easy problem that hardens of plate-type or tubular heat exchanger, heat exchange efficiency is lower, needs a large amount of cooling water, adopt water seal groove 2 to replace water seal system, solve water seal groove easily harden, the deposition, damage the defect of boiler water seal picture peg. Need not to carry out whole transformation to original dragveyer cooling water system with novel, only need carry out equipment additional installation, change to heat exchanger, water seal system etc. consequently, can reduce dragveyer cooling water zero overflow system's popularization and application effect by a wide margin.

As shown in fig. 2 and 3, in the present embodiment, a purifying and filtering device is disposed below the water seal tank 2, when the purifying and filtering device is used, water discharged from the water seal tank 2 enters the filtering cavity 11 of the purifying tank 7 along the water inlet pipe 15, impurities carried in the water are precipitated in the filtering cavity 11, the clarified water overflows into the purified water cavity 12 along the upper end of the overflow plate 10, and is precipitated again in the purified water cavity 12, and the precipitated water in the purified water cavity 12 enters the water seal tank again along the water outlet pipe 16 under the action of the circulating pump 17, so that repeated recycling is achieved.

Impurities carried in water discharged from the water seal tank are separated from water, so that the water can be recycled, and the waste of water resources is reduced. Impurities precipitated in the purification tank 7 respectively fall to the bottom of the purification tank 7 along the first inclined plate 8 and the second inclined plate 9 and are accumulated at positions close to the first manhole and the second manhole, when the impurities are cleaned, the first drain valve and the second drain valve are firstly opened, the liquid level in the purification tank 7 is reduced to the pipe orifice positions of the first drain pipe 13 and the second drain pipe 14 at the upper parts of the first inclined plate 8 and the second inclined plate 9 through the first drain pipe 13 and the second drain pipe 14, most of water in the purification tank 7 is discharged at the moment, the residual impurities and a small amount of water in the purification tank 7 are positioned below the pipe orifices of the first drain pipe 13 and the second drain pipe 14, at the moment, the first manhole and the second manhole can be opened to clean the impurities in the purification tank 7, the first inclined plate 8 and the second inclined plate 9 are inclined relative to the horizontal plane, so the impurities can continuously flow to the population along the inclined plates in the cleaning process, and the impurities can be conveniently cleaned without entering the purification tank 7, the labor intensity of cleaning is reduced, and the working efficiency is improved. The impurity that deposits in the purification tank 7 is located first drain pipe 13 and second drain pipe 14 mouth of pipe below in the drainage process, consequently can not discharge along with water, and this structure can avoid drainage in-process first drain pipe 13 and second drain pipe 14 to be blockked by impurity.

The turbulence generated by the water flow is prevented from disturbing impurities at the bottom of the filter cavity 11 and influencing the precipitation effect of the impurities, a flow stabilizing net 18 parallel to the horizontal plane can be arranged in the filter cavity 11, and the height of the flow stabilizing net 18 is lower than that of the upper end of the overflow plate 10. The flow stabilizing net 18 can disperse water flow after contacting with the water flow entering the filter cavity 11, reduce the flow velocity of the water flow in the vertical direction, reduce the turbulence effect generated by the water flow, and enable impurities to be stably deposited at the bottom of the filter cavity 11.

The utility model discloses an inclination of first swash plate 8 and second swash plate 9 can adjust according to 7 sizes of purifying tank, and the contained angle is 90 between preferred adoption first swash plate 8 and the second swash plate 9, and is comparatively laborsaving during impurity clearance during impurity, and easily gets rid of impurity. The first inclined plate 8 and the second inclined plate 9 are provided with vibrators, and the efficiency of cleaning impurities is improved by vibration.

The technical contents not described in detail in the present invention are all known techniques.

Claims

1. Slag cooling water balance system at bottom of boiler, including installing water seal groove and temperature control unit, the water level control unit on the dragveyer basin, its characterized in that, the first water inlet of dragveyer basin passes through the first delivery port of pipe connection cooling water pool, and the first delivery port of cooling water pool passes through another way pipe connection water curtain import, and the second import of water curtain exit linkage cooling water pool, the delivery port of water seal groove, dragveyer basin and the second import intercommunication of cooling water pool, the second delivery port of cooling water pool passes through the pipeline and is connected with the second water inlet of dragveyer basin.

2. The boiler bottom slag cooling water balance system according to claim 1, wherein the water temperature control unit comprises a temperature sensor, a signal output end of the temperature sensor is connected with a signal input end of a variable frequency water pump, and the variable frequency water pump is installed on a pipeline between a first water outlet of the cooling water pool and a first water inlet of the water tank of the slag conveyor.

3. The boiler bottom slag cooling water balance system according to claim 1, wherein the water level control unit comprises a liquid level sensor, a signal output end of the liquid level sensor is connected with a signal input end of an overflow water pump, and the overflow water pump is installed on a pipeline between a water outlet of a water tank of the slag conveyor and a second inlet of the cooling water tank.

4. The boiler bottom slag cooling water balance system of claim 1, wherein a ceramic fiber cloth for filtering ash is provided in the water seal tank.

5. The boiler bottom slag cooling water balance system according to claim 1, wherein a filtering and purifying device is installed below the water seal tank, the filtering and purifying device comprises a purifying tank, a first inclined plate and a second inclined plate are arranged at the bottom of the purifying tank, the top of the first inclined plate is connected with the top of the second inclined plate, the junction of the top of the first inclined plate and the top of the second inclined plate is connected with an overflow plate, the overflow plate divides the purifying tank into a filter cavity and a purified water cavity, the upper part of the first inclined plate is communicated with a first drain pipe, a first drain valve is arranged on the first drain pipe, a second drain valve is arranged on the second drain pipe, a first manhole is arranged on the side wall of the purifying tank close to the lower end of the first inclined plate, a second manhole is arranged on the side wall of the purifying tank close to the lower end of the second inclined plate, a water inlet pipe is arranged in the filter cavity, a water, the water inlet pipe and the water outlet pipe are communicated with the water seal groove.

6. The boiler bottom slag cooling water balance system of claim 5, wherein a flow stabilizing net is arranged in the filter cavity, and the flow stabilizing net is vertically arranged in the middle of the overflow plate.

7. The boiler bottom slag cooling water balance system of claim 5, wherein an included angle formed by the first inclined plate and the second inclined plate is 90 °, and the first inclined plate and the second inclined plate are both provided with vibrators.