CN201426362Y - Tobacco room heat exchanger - Google Patents

Abstract

A heat exchanger for a flue-cured tobacco room, which includes a furnace heat flue gas inlet, a heat exchange pipe, and a smoke exhaust chimney. The two ends of the heat pipe are respectively connected with the front gas collection box and the rear gas collection box to form a flue gas inlet and outlet passage. The furnace hot flue gas inlet is connected with the lower part of the front gas collection box. The chimney is designed at the end of the flue gas passage. The utility model has large heat exchange area and high heat exchange efficiency; the flow resistance of flue gas in the heat exchanger of the flue-cured room is small, and the air flow rate is large; and the ash accumulation inside the heat exchanger of the flue-cured room is convenient to be removed.

Description

Tobacco room heat exchanger

technical field

The utility model relates to tobacco preparation equipment, in particular to a heat exchanger for a tobacco curing room.

Background technique

At present, most of the heat exchangers used in the flue-cured rooms of tobacco systems in the market are coal-fired furnace flue-cured rooms, and the use of biomass briquette flue-cured room heat exchangers is blank. There are also a small number of units and institutions in China that have developed some flue-cured room heat exchangers that are compatible with biomass stoves, but the main problem is that the heat exchange efficiency is low. Due to the large range of heat supply required by flue-cured tobacco, it cannot meet the requirements of tobacco curing. , and problems such as excessive exhaust gas temperature, low output heat, uneven output temperature, and large heat exchanger resistance.

Contents of the invention

In view of the above disadvantages, the utility model provides a heat exchange chamber used in the heat exchange room of the flue-cured tobacco room, which can be matched with the biomass briquette (coal) dual-fuel double-furnace gasification direct-fired tobacco furnace and can also meet the requirements of flue-cured tobacco. device.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

A heat exchanger for a flue-cured room, which includes a furnace heat flue gas inlet, a heat exchange pipe and a smoke exhaust chimney, the furnace heat flue gas inlet and the smoke exhaust chimney are respectively connected to the two ends of the heat exchange pipe and form a hot flue gas inlet and outlet path. It is characterized in that: the two ends of the heat exchange tube are respectively connected with the front gas collection box and the rear gas collection box to form a flue gas inlet and outlet passage, the furnace hot flue gas inlet is connected with the lower part of the front gas collection box, and the front gas collection box is designed with a clear The gray door and the smoke exhaust chimney are designed at the tail of the smoke passage.

The above-mentioned heat exchanger for flue-cured tobacco room is characterized in that: the heat exchange tubes are designed to be multiple corresponding to the flow rate of hot flue gas, the middle part of the front gas collection box is designed with a horizontal front gas collection box partition, and the front gas collection box partition The plate divides the front gas collecting box into the upper room of the front gas collecting box and the lower room of the front gas collecting box. , The rear gas collection box is connected with the upper room of the front gas collection box, and the smoke exhaust chimney is installed on the top of the front gas collection box and connected with the upper room of the front gas collection box.

The above-mentioned heat exchanger for flue-cured tobacco room is characterized in that: two ash-cleaning doors with symmetrical positions are designed on the front side wall of the front gas-collecting box, and a soot-cleaning door is also designed at the bottom of the rear gas-collecting box; the front gas-collecting box and The rear gas collection boxes are connected by assembly and fixed drawing wires with threads at both ends. Sealing gaskets are designed for the connection between the heat exchange tube and the front gas collection box and the rear gas collection box. The upper and lower tubes are arranged in a staggered position.

The flue-curing room heat exchanger described in the utility model is a kind of "gas-gas" heat exchange equipment specially designed for intensive tobacco-curing room. The gas inlet, the front gas collection box, the first return heat exchange tube, the rear gas collection box, the second return heat exchange tube, the smoke exhaust chimney and the ash cleaning door are composed of several parts, and the heat source is supplied by a single biomass briquetting stove. The heat exchanger adopts the combination and assembly method of parts, the hot flue gas inlet and the front gas collection box are integrated, and the rear gas collection box is integrated, and the whole is assembled on site. It has the characteristics of novel structure, reliable operation, convenient transportation, convenient installation, etc. It is one of the ideal heat exchangers in the current flue-cured room heat exchangers. The advantages are as follows:

The heat exchanger in the flue-cured room uses less materials, has a large heat exchange area and high heat exchange efficiency;

The overall structure is convenient for production, packaging, transportation and on-site installation;

The flow resistance of the flue gas in the heat exchanger of the flue-cured room is small, and the turbulence state is good;

The flow resistance of the air outside the heat exchanger of the flue-cured room is small, and the air flow rate is large;

The dust accumulated inside the heat exchanger of the flue-cured room is easy to remove.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present utility model.

In the figure 1. Furnace hot flue gas inlet, 2. Ash cleaning door, 3. Lower room of front gas collection box, 4. Smoke exhaust chimney, 5. Assembly and fixed wire drawing, 6. Heat exchange tube, 7. Rear gas collection box, 8. Primary return heat exchange tube, 9. Sealing gasket, 10. Upper chamber of the front gas collection box, 11. Support column, 12. Partition plate of the front gas collection box.

Detailed ways

Example 1

A kind of flue-cured tobacco room heat exchanger as shown in Fig. 1, it comprises furnace hot flue gas inlet 1, front gas collection box, heat exchange tube, rear gas collection box 7, smoke exhaust chimney 4, the two ends of heat exchange tube respectively It is connected with the front gas collection box and the rear gas collection box 7 and forms a passage for smoke in and out. The middle part of the front gas collection box is designed with a horizontal front gas collection box partition 12, and the front gas collection box partition 12 divides the front gas collection box into two parts: The upper chamber 10 of the front gas collection box and the lower chamber 3 of the front gas collection box, the heat exchange tube connected to the lower chamber 3 of the front gas collection box is a return heat exchange tube 8, and the one connected to the upper chamber 10 of the front gas collection box is a two-pass heat exchange tube The heat exchange tube 6, the lower chamber 3 of the front gas collection box communicates with the furnace heat flue gas inlet 1 and communicates with the upper chamber 10 of the front gas collection box through the first return heat exchange pipe 8, the rear gas collection box 7, and the second return heat pipe 6 , The smoke exhaust chimney 4 is installed on the top of the front gas collecting box and communicates with the upper chamber 10 of the front gas collecting box. The heat exchange tubes are designed to be multiple corresponding to the flow rate of the hot flue gas, and the upper and lower heat exchange tubes are arranged in a staggered position. Two ash removal doors 2 with symmetrical positions are designed on the front side wall of the front gas collection box, and a dust removal door (not shown in the figure) is also designed at the bottom of the rear gas collection box; between the front gas collection box and the rear gas collection box It is connected by assembly and fixed drawing wires 5 with threads at both ends, a sealing gasket 9 is designed at the connection between the heat exchange tube and the front gas collection box and the rear gas collection box, and a support column 11 is designed under the rear gas collection box.

The heat exchanger for the flue-cured room is used in the standard flue-cured room. The length, width and height of the hanging room in the standard flue-cured tobacco curing room are 8000mm, 2700mm and 3500mm respectively. 1600mm, 3500mm, the heat supply of the flue-cured tobacco furnace is 330Mj/hour, the consumption of biomass straw briquettes is 35kg/h, and the temperature in the empty standard flue-cured tobacco curing room without fresh tobacco leaves is heated to 80°C within 90 minutes during the fire, which meets the national tobacco The requirements of flue-cured tobacco standards formulated by the General Administration.

working principle:

The working principle of the heat exchanger in the flue-cured tobacco curing room is: use the circulating fan installed in the flue-cured tobacco curing room to scour the outer surface of the flue-cured tobacco heat exchanger horizontally, and replace the heat of the hot flue gas in the heat exchanger for curing tobacco leaves. The high-temperature flue gas of the heat exchanger enters the lower chamber 3 of the front gas collection box from the furnace hot flue gas inlet 1, and is first distributed in the room and flows into a return heat exchange pipe 8, and then enters the rear gas collection box 7 for mixing, so that the mixed flue gas After the temperature is uniform, it enters the upper chamber 10 of the front gas collecting box through the two return heat exchange pipes 6, and finally discharges from the smoke exhaust chimney 4; , The second-pass heat exchange tube and the outer surface of the front and rear gas collection boxes take away the heat from radiation, conduction and convection, and send it to the tobacco curing room for curing tobacco leaves. The heat exchanger is flushed horizontally so that it can obtain greater heat exchange efficiency. The main function of the gas collection box is to mix and distribute the hot flue gas from the first return heat exchange tube 8 and the second return heat exchange tube 6, and to settle and temporarily store the heat exchanger of ash. The first-pass heat exchange tube 8 and the second-pass heat exchange tube 6 are the main components of the "gas-to-gas" heat exchanger, which are used for heat exchange and as a channel for high-temperature flue gas. The hot flue gas inlet pipe 1 of the heat exchanger is mainly connected to the tobacco curing oven and the heat exchanger, and the effect of the smoke exhaust chimney 4 is to discharge the low-temperature flue gas out of the room after heat exchange by the heat exchanger. Two dust-cleaning doors 2 are housed on the front air-collecting box, which is convenient for regularly cleaning the accumulated dust in the heat exchanger.

Working steps of heat exchanger in flue-cured tobacco room:

1. Start the circulation fan in the flue-cured room.

2. Light the biomass briquette flue-cured furnace. At this time, the heat exchanger has entered the normal working state for heat exchange.

3. After the work is over, the biomass briquette flue-cured furnace should be stopped first (turn off the flame), and then the circulation fan in the flue-cured room should be stopped. It is strictly forbidden for the heat exchanger in the flue-cured room to exchange heat when the circulating fan is not running.

4. The dust accumulated in the heat exchange tubes of the heat exchanger and the gas accumulation box should be cleaned every kang.

Claims (3)

1, a kind of heat exchanger of tobacco flue-curing house, it comprises the hot gas approach of stove (1), heat exchanger tube and smoke evacuation chimney (4), the hot gas approach of stove (1), smoke evacuation chimney (4) connect the two ends of heat exchanger tube respectively and constitute hot flue gas turnover path, it is characterized in that: the two ends of heat exchanger tube link to each other with back plenum chamber (7) with preceding plenum chamber respectively and form flue gas turnover path, the hot gas approach of stove (1) links with preceding plenum chamber bottom, design has shoot door (2) on the preceding plenum chamber, and smoke evacuation chimney (4) design is at the afterbody of flue gas path.

2, a kind of heat exchanger of tobacco flue-curing house according to claim 1, it is characterized in that: heat exchange tube design is and corresponding many of hot flue gas flow, the middle part design of preceding plenum chamber has the preceding plenum chamber dividing plate (12) of level, before plenum chamber dividing plate (12) preceding plenum chamber is divided into before chamber (3) under chamber (10) and the preceding plenum chamber on the plenum chamber, chamber (3) links with the hot gas approach of stove (1) and the heat exchanger tube by linking to each other with chamber (3) under the preceding plenum chamber under the preceding plenum chamber, chamber (10) links on back plenum chamber (7) and the preceding plenum chamber, before smoke evacuation chimney (4) is installed on the plenum chamber top and with preceding plenum chamber on chamber (10) link.

3, a kind of heat exchanger of tobacco flue-curing house according to claim 1 and 2 is characterized in that: design has two shoot doors (2) of position symmetry on the preceding plenum chamber front side wall, and shoot door is arranged at back plenum chamber (7) bottom also design; Before plenum chamber with afterwards be connected by fixedly wire drawing of the screwed assembling in two ends (5) between the plenum chamber, heat exchanger tube and preceding plenum chamber and back plenum chamber (7) connecting portion design have seal washer (9), the below design of back plenum chamber has support column (11), and the staggered certain position of the upper and lower employing of heat exchanger tube is arranged.

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