CN223869231U - A boiler flue waste heat recovery device - Google Patents

Abstract

This application discloses a boiler flue waste heat recovery device in the field of flue gas waste heat recovery technology, including a support frame, a recovery box, a boiler, a first recovery component and a second recovery component. The recovery box is connected to the top of the support frame, and the top of the recovery box is connected to a chimney. The boiler is connected to the bottom of the support frame through a flue. The first recovery component and the second recovery component are detachably connected inside the recovery box. The first recovery component and the second recovery component are used to recover the heat of the flue gas in the boiler.

Description

Boiler flue waste heat recovery device

Technical Field

The utility model relates to the technical field of boiler flue gas recovery, in particular to a boiler flue waste heat recovery device.

Background

In industrial production, the boiler is used as a core thermodynamic device, and high-temperature flue gas discharged by a flue contains a large amount of waste heat. The traditional boiler flue heat recovery device generally adopts a single heat exchange structure, such as a fixed heat exchange tube or a plate heat exchanger, and can realize partial heat recovery, but has obvious defects.

Most of heat exchange assemblies of the existing device are welded or fixed by bolts, and are difficult to detach and clean. After long-term operation, smoke dust is accumulated on the outer wall of the pipeline, the thermal resistance is increased, frequent shutdown and cleaning are needed, the production continuity is affected, and a single component is difficult to fully absorb multi-stage heat of the smoke, and particularly, the utilization rate of medium-low temperature waste heat is insufficient, so that the overall thermal efficiency is generally lower than 50%. In addition, fly ash, sulfide particles and the like carried in the flue gas directly enter the heat exchange unit, so that the corrosion of the pipeline is increased, and the flue gas flow channel is blocked. Although a filter screen is additionally arranged on part of the device, most of the devices are of a single-layer structure, and particles with different particle diameters cannot be effectively intercepted.

Disclosure of utility model

The utility model aims to provide a boiler flue recovery device for solving the problem that a recovery component of the existing boiler flue recovery device is inconvenient to detach and clean.

In order to solve the technical problems, the utility model provides the technical scheme that the boiler flue waste heat recovery device comprises a support frame, a recovery box, a boiler, a first recovery component and a second recovery component, wherein the recovery box is connected to the top end of the support frame, the top end of the recovery box is communicated with a chimney, the boiler is connected to the bottom end of the support frame through the flue, the first recovery component and the second recovery component are detachably connected in the recovery box, and the first recovery component and the second recovery component are used for recovering the flue gas heat in the boiler.

The utility model has the working principle that high-temperature flue gas generated by a boiler enters the bottom end of a supporting frame through a flue and vertically rises to a recovery box under the action of negative pressure, a circulating water pipe embedded in a groove of a recovery plate is communicated with an external circulating water tank, a water pump drives water to circulate in a pipeline, the flue gas is fully contacted with the surface of the circulating water pipe, high-temperature heat is conducted to the water flow through the pipe wall, primary heat recovery is realized, the flue gas after primary cooling flows upwards, secondary heat exchange is carried out on the flue gas and the surface of a heat absorption water pipe, and medium-low-temperature waste heat is further recovered, so that the temperature of the flue gas is reduced.

The utility model has the beneficial effects that 1. The first recovery component aims at a high-temperature section, and the second recovery component aims at a middle-low-temperature section, so that the heat is captured in a segmented way, and the high-quality low-use is avoided. 2. According to the recovery box and the recovery assembly, all parts between the recovery assembly can be disassembled to be cleaned without special tools, so that the maintenance period is prolonged. 3. The heat absorption water pipe preheats the boiler inlet water, reduces fuel consumption, and simultaneously reduces CO2 emission. 4. The equipment is formed by modularization, so that the waste heat recovery equipment suitable for the requirements can be formed by discharging environmental protection requirements and recovering heat requirements according to the requirements of waste heat discharged by the boiler. 5. The modularized design can facilitate disassembly and assembly and maintenance in the later stage, reduce the overall investment cost and the replacement cost, is convenient to disassemble, assemble and clean in the later stage, and can maintain high-efficiency recovery of waste heat for a long time after cleaning.

Further, first recovery subassembly is including retrieving frame and a plurality of circulating water pipe, retrieve the frame and include cardboard and recovery board, retrieve the lateral wall of board connection at the cardboard, retrieve the centre fretwork of board, the relative both sides of recovery board are equipped with a plurality of recesses, a plurality of circulating water pipe connection is in a plurality of recesses, the one end of a plurality of circulating water pipe runs through the recycling bin and communicates there is external circulation heat preservation water tank's circulation import, the other end of a plurality of circulating water pipe and external heat preservation water tank's circulation export intercommunication and a plurality of circulating water pipe are connected with circulating water pump with external heat preservation water tank's joint department. Through the setting of recovery board and circulating water pipe for when the flue gas reentrant collection box of boiler, can be very first time by circulating water pipe absorption heat, when carrying out equipment cleaning, circulating water pipe can also lift down from the recovery board and carry out the piecemeal and wash and maintain, convenient clearance maintenance link of device.

Further, the second recovery assembly comprises a recovery frame and a heat absorption water pipe, the heat absorption water pipe is coiled on the groove of the recovery frame in a bending mode, one end of the heat absorption water pipe is connected with a tap water pipe, and the other end of the heat absorption water pipe is communicated with the heat preservation water tank. Through the setting of recovery board and heat absorption water pipe for boiler flue gas waste heat can further be by recycle after first recovery subassembly.

Further, the first recovery assembly is located at the bottom end of the second recovery assembly. Through the setting of first recovery subassembly and second recovery subassembly position for the recovery efficiency of flue gas waste heat reaches the highest.

Further, a screening block is connected between the first recovery component and the second recovery component, and a screen is arranged in the middle of the screening block. Through the arrangement of the screen mesh, fine particles mixed in the boiler flue gas can be filtered.

Further, the top of the recovery box is connected with a limiting frame, and the chimney is connected to the center of the limiting frame. Through the setting of spacing for the position of chimney can be fixed, and the chimney receives and assaults and rock when avoiding a large amount of steam blowout.

Drawings

FIG. 1 is a schematic diagram of a recovery tank in a boiler flue waste heat recovery device according to the present utility model

FIG. 2 is a schematic structural view of a boiler flue waste heat recovery device according to the present utility model;

FIG. 3 is a schematic view of the recycling rack of FIG. 1;

FIG. 4 is a side view of FIG. 2;

fig. 5 is a top view of the screen block of fig. 1.

Detailed Description

The following is a further detailed description of the embodiments:

The reference numerals in the drawings of the specification comprise a chimney 1, a limiting frame 2, a recovery box 3, a screening block 4, a screen 401, a recovery frame 5, a recovery plate 501, a groove 502, a clamping plate 503, a handle 504, a supporting frame 6, a flue 7 and a boiler 8.

An example is substantially as shown in figures 1 to 4 of the accompanying drawings: A boiler flue waste heat recovery device comprises a support frame 6, a recovery box 3, a boiler 8, a first recovery component and a second recovery component, wherein the recovery box 3 is fixedly connected to the top end of the support frame 6, the top end of the recovery box 3 is fixedly connected with a limiting frame 2, drainage ditches are arranged around the inner bottom end of the recovery box 3, one side of the drainage ditches are communicated with the outside, the top end of the recovery box 3 is communicated with a chimney 1, the chimney 1 is positioned at the center of the limiting frame 2, the boiler 8 is fixedly connected to the bottom end of the support frame 6 through the flue 7, the first recovery component and the second recovery component are two, the two first recovery components are positioned at the bottom ends of the two second recovery components, a screening block 4 is slidingly connected between the two first recovery components and the second recovery components, the middle of the screening block 4 is a screen 401, the first recovery component comprises a recovery frame 5 and a circulating water pipe, the recovery frame 5 comprises a clamping plate 503 and a recovery plate 501, the recovery plate 501 is fixedly connected in the middle of the left side wall of the clamping plate 503, a handle 504 is fixedly connected in the middle of the right side wall of the clamping plate 501, the middle of the recovery plate 501 is hollowed out, symmetrical grooves 502 are respectively arranged on the left side and the right side of the recovery plate 501, a circulating water pipe is slidably connected in the opposite grooves 502, one end of the circulating water pipe penetrates through the recovery tank 3 and is communicated with a circulating inlet of an external heat preservation water tank, the other end of the circulating water pipe is communicated with a circulating outlet of the external heat preservation water tank, a circulating water pump is fixedly connected at a joint of the circulating water pipe and the external heat preservation water tank, the second recovery assembly comprises the recovery frame 5 and a heat absorption water pipe, the heat absorption water pipe is in a curved sliding coil shape and is fixedly connected with a tap water pipe on the grooves 502 of the recovery frame 5, the other end of the heat absorption water pipe is communicated with the heat preservation water tank.

The specific implementation process is that the flue gas generated by the boiler 8 enters the bottom end of the supporting frame 6 through the flue 7 and then rises into the recovery box 3. The flue gas is first through first recovery subassembly, its circulating water pipe embeds the recess 502 of recovery board 501, through external heat preservation water tank and circulating water pump drive rivers, absorb the high temperature heat in the flue gas fast, realize first heat recovery, afterwards, the flue gas upwards flows and passes through screening piece 4's screen cloth 401, filter out tiny particulate matter, avoid follow-up subassembly to block up, the flue gas after filtering gets into the second recovery subassembly, the heat absorption water pipe that the bending coil fully contacts with the flue gas, further absorb the waste heat, heat absorption water pipe one end is connected the tap water pipe, the other end carries the water after preheating to the heat preservation water tank in, heat preservation water tank keeps the water of input at certain temperature, when boiler 8 needs during the next work, heat preservation water tank carries water to boiler 8 in, reduce boiler 8 heating energy consumption, first recovery subassembly is located the second recovery subassembly below, form ladder heat recovery structure, ensure flue gas cooling step by step, maximize heat utilization ratio, the spacing 2 fixed chimney 1 position on recovery tank 3 top, ensure that the exhaust is stable, reduce the influence of air current impact to equipment.

The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (5)

1. A boiler flue waste heat recovery device, characterized in that: it includes a support frame, a recovery box, a boiler, a first recovery component and a second recovery component, wherein the recovery box is connected to the top of the support frame, the top of the recovery box is connected to a chimney, the boiler is connected to the bottom of the support frame through a flue, and the first recovery component and the second recovery component are detachably connected inside the recovery box, wherein the first recovery component and the second recovery component are used to recover the heat of the flue gas inside the boiler. 2. A boiler flue waste heat recovery device according to claim 1, characterized in that: the first recovery component includes a recovery frame and multiple circulating water pipes, the recovery frame includes a retaining plate and a recovery plate, the recovery plate is connected to the side wall of the retaining plate, the recovery plate has a hollow center, multiple grooves are provided on opposite sides of the recovery plate, multiple circulating water pipes are connected in the multiple grooves, one end of the multiple circulating water pipes passes through the recovery box and is connected to the circulation inlet of an external circulating insulated water tank, the other end of the multiple circulating water pipes is connected to the circulation outlet of the external insulated water tank, and a circulating water pump is connected to the joint of the multiple circulating water pipes and the external insulated water tank. 3. A boiler flue waste heat recovery device according to claim 2, characterized in that: the second recovery component includes a recovery rack and a hot water suction pipe, the hot water suction pipe is coiled in a curved shape around the groove of the recovery rack, one end of the hot water suction pipe is connected to a tap water pipe, and the other end of the hot water suction pipe is connected to an insulated water tank. 4. A boiler flue waste heat recovery device according to claim 3, characterized in that: the first recovery component is located at the bottom end of the second recovery component. 5. A boiler flue waste heat recovery device according to claim 4, characterized in that: a screening block is connected between the first recovery component and the second recovery component, and the middle of the screening block is a screen.