CN202253576U - Plate type economizer for power station boiler - Google Patents

Abstract

The utility model relates to a plate-type economizer for a power plant boiler, which consists of a corrugated plate heat exchange core body, a flue gas inlet and outlet pipeline and a water inlet and outlet pipeline. The front and rear sides of the heater shell are connected to the flue gas inlet and outlet pipelines, and the left and right sides are connected to the water inlet and outlet pipelines. The corrugated plate heat exchange core is stacked in a certain way by multiple corrugated plates. Each corrugated plate It is composed of a corrugated area and a flat area. One side of the corrugated plate and the adjacent corrugated plates are stacked in the same structural order, and the gap between two adjacent corrugated plates forms a water flow wave channel with the same plate spacing; Adjacent corrugated plates are stacked in the order that the troughs are relative to the troughs, and the crests are relative to the crests in the corrugated area. The interval between the troughs and the crests forms a pipe-like channel for flue gas flow. The utility model has a compact structure, reduces steel consumption and floor space, improves heat exchange efficiency, and because the flue gas flows in the tubular channel, the flue gas flow resistance is small, and dust accumulation is not easy.

Description

A utility boiler plate economizer

technical field

The utility model relates to a plate-type economizer for a power station boiler, which belongs to the technical field of waste heat recovery and energy-saving equipment for power station boilers. the

Background technique

At present, the economizers used in power plant boilers are all light tube or finned tube economizers. Most of the finned tube economizers use welded wound fins or expanded tube fins, but the thermal resistance at the root of the fins is relatively large. Heat transfer is poor and compactness is low. Therefore, the tube-type economizer has poor heat transfer capacity and low efficiency, consumes a large amount of pipe materials, occupies a large area, and has high production costs. Moreover, due to the vertical contact between the flue gas and the heat exchange tubes, the flow resistance increases and it is easy to accumulate dust. And the wear of the heat exchange tube increases, which affects the life of the economizer. the

Utility model content

The purpose of this utility model is to provide a plate type economizer for power plant boilers with compact structure, good heat exchange effect, small flue gas pressure loss, not easy to accumulate dust and scale, and low production cost. the

The utility model is realized through the following technical solutions. A utility model boiler plate economizer includes: a corrugated plate heat exchange core 1, a heat exchanger shell 2, a flue gas inlet and outlet pipeline 3 and a water inlet and outlet pipe 4, wherein: the corrugated plate heat exchange core 1 is placed in the heat exchanger shell 2, and the heat exchanger shell 2 is a rectangular structure with openings around the front, back, left and right sides, and the front, rear, and right sides of the heat exchanger shell 2 The rear two sides are respectively connected to the flue gas inlet and outlet pipelines 3, and the left and right sides are respectively connected to the water inlet and outlet pipelines 4. The corrugated plate heat exchange core 1 is formed by stacking a plurality of corrugated plates 5 in a certain way , each corrugated plate 5 is composed of a corrugated area 5.1 and a plane area 5.2, the corrugated area 5.1 is located above the plane area 5.2, one side of a corrugated plate 5 is stacked with the adjacent corrugated plate 5 in the same structural order, and two adjacent corrugated plates The gap between the 5 forms a water flow wave channel 7 with the same plate spacing; the other side of a corrugated plate 5 and the adjacent corrugated plate 5 are stacked in the order that the troughs of the corrugated area 5.1 are opposite to the troughs, and the crests are relative to the crests. The interval between the wave crests and the wave peaks forms the flue gas flow tubular channel 6 . the

In the present utility model, edge strips 8 are arranged around the corrugated board 5 . the

In the present utility model, the corrugated plate 5 is a rectangular plate, and the width of the plane area 5.2 on one side is equal to the sum of the width of the plane area on the other side and half the corrugation period. the

In the utility model, the flue gas flow tubular channel 6 satisfies elliptic curves, circular arcs, sinusoidal curves or hexagons, etc., the equivalent diameter of the flue gas flow tubular channel 6 is 10mm-30mm, and the channel formed by stacking two corrugated plates is Straight through shape. the

In the utility model, the height of the water flow waveform channel 7 is 1mm-20mm, and the channel formed by stacking two corrugated plates is wave-shaped. the

The advantages of the utility model are: 1) All the heat exchange surfaces of flue gas and water in the corrugated plate heat exchange core are primary surfaces, the heat exchange efficiency is greatly improved, the structure is compact, and the floor area is small. 2) Combining the advantages of tube and plate heat exchangers, the flue gas flow passes through the tubular channel, the pressure loss is low, it is not easy to accumulate dust and scale, and it is easy to clean the dust. The board spacing can be adjusted according to the situation. 3) The gap between the two corrugated plates before entering the tubular channel can completely pass the flue gas, which overcomes the previous problem of small spacing between the plates before entering the tubular flow. 4) The production process is simple, the cost is low, and it is easy to form modules and easy to install. the

Description of drawings

Fig. 1 is a structural representation of the utility model. the

Fig. 2 is a schematic diagram of the assembly of a single channel of the utility model. the

Fig. 3 is a schematic diagram of working medium flow in the channel of the present invention. the

Fig. 4 Schematic diagram of the structure of the corrugated plate heat exchange core of the utility model. the

Figure 5 is a schematic diagram of the corrugated plate of the utility model. the

Figure 6 is a schematic diagram of the channel structure of the utility model. the

Numbers in the figure: 1 is the corrugated plate heat exchange core, 2 is the heat exchanger shell, 3 is the flue gas inlet and outlet pipeline, 4 is the water inlet and outlet pipeline, 5 is the corrugated plate, 5.1 is the corrugated area, 5.2 is the plane In the zone, 6 is the flue gas flow tubular channel, 7 is the water flow wave channel, and 8 is the edge strip. the

Detailed ways

Further illustrate the utility model below in conjunction with embodiment by accompanying drawing. the

Embodiment 1: Referring to FIG. 1 , it includes a corrugated plate heat exchange core 1 , a heat exchanger shell 2 , flue gas inlet and outlet pipelines 3 , and water inlet and outlet pipelines 4 . The corrugated plate heat exchange core 1 has a plurality of corrugated plates 5 stacked in a certain combination to form a flue gas flow tubular channel 6 and a water flow wave channel 7, and the flue gas inlet is formed by welding the upper and lower frame edges of the corrugated plates at intervals. Outlet and water import and export. the

The corrugated plate 5 is composed of a corrugated area 5.1 and a flat area 5.2. The width of the flat area on one side of the corrugated plate is equal to the sum of the width of the flat area on the other side and half the corrugation cycle. the

The corrugated plate heat exchange core is formed by stacking a plurality of corrugated plates together in a certain way. The corrugated plate troughs are opposite to the troughs, and the wave crests are stacked to form water corrugated channels with the same plate spacing, and form a plate bundle, and the slightly wider plane area of the other plate bundle is aligned with it, and the crests are opposite to the troughs to form a flue gas tubular flow channel. Fix with side bar 8 between the plates. the

The flue gas flow tubular channel 6 satisfies elliptic curves, circular arcs, sinusoidal curves, hexagons, etc. The equivalent diameter of the corrugated channel is 10mm-30mm, and the channel formed by stacking two corrugated plates is in a straight-through shape. the

The water flow wave channel 7 has a height of 1mm-20mm, and the channel formed by stacking two corrugated plates is wavy. the

Claims (5)

1. A plate-type economizer for a utility boiler, comprising a corrugated plate heat exchange core (1), a heat exchanger shell (2), flue gas inlet and outlet pipelines (3) and water inlet and outlet pipelines (4), It is characterized in that: the corrugated plate heat exchange core (1) is placed in the heat exchanger shell (2), and the heat exchanger shell (2) is a rectangular structure with openings around its front, back, left and right sides, and the heat exchanger shell The front and rear sides of (2) are respectively connected to the flue gas inlet and outlet pipelines (3), and the left and right sides are respectively connected to the water inlet and outlet pipelines (4). The corrugated plate heat exchange core (1) is composed of multiple The corrugated boards (5) are stacked in a certain way, and each corrugated board (5) is composed of a corrugated area (5.1) and a plane area (5.2), and the corrugated area (5.1) is located above the plane area (5.2). One side of the corrugated plate (5) and the adjacent corrugated plates (5) are stacked in the same structural order, and the gap between two adjacent corrugated plates (5) forms a water flow wave channel (7) with the same plate spacing; one corrugated plate (5) The other side and the adjacent corrugated plate (5) are stacked in the order that the troughs of the corrugated area (5.1) are relative to the troughs, and the crests are relative to the crests. 6). 2. The plate economizer for power plant boiler according to claim 1, characterized in that edge strips (8) are provided around the corrugated plate (5). 3. The utility boiler plate economizer according to claim 1, characterized in that the corrugated plate (5) is a rectangular plate, and the width of the plane area (5.2) on one side is equal to the width of the plane area on the other side and half sum of ripple periods. 4. The utility boiler plate economizer according to claim 1, characterized in that the flue gas flow tubular passage (6) satisfies elliptic curves, circular arcs, sinusoidal curves or hexagons, and the flue gas flow tubular passage (6) The equivalent diameter is 10mm-30mm. 5. The utility boiler plate economizer according to claim 1, characterized in that the height of the water flow wave channel (7) is 1mm-20mm.

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