CN204678299U - A kind of steam generator - Google Patents

Abstract

The utility model provides a steam generator, which includes a water tank, a burner arranged on the outer wall of the upper part of the water tank, a primary heat exchanger and a secondary heat exchanger arranged in the water tank, and the primary heat exchanger is located at the bottom of the water tank. The upper part, the secondary heat exchanger is located at the lower part of the water tank, the primary heat exchanger includes a sealed cavity I, the secondary heat exchanger includes a sealed cavity II, and the burner combustion chamber passes through the primary heat exchanger The heat pipe communicates with the sealed cavity I, and the sealed cavity I communicates with the sealed cavity II through the secondary heat exchange tube, and the sealed cavity I and the sealed cavity II are provided with a water channel between the top and the bottom , the sealed cavity II is connected with an exhaust pipe, and the exhaust pipe is connected with an exhaust fan, and the lower side wall of the water tank is provided with a sewage window. The heat exchanger structure of the steam generator is reasonably designed, which can make full use of heat energy, save energy, not easy to scale on the pipeline, avoid dry burning of the evaporator, facilitate cleaning of dirt, simple structure, and easy to use.

Description

a steam generator

technical field

  The utility model relates to the field of steam production equipment, in particular to a steam generator.

Background technique

   With the continuous development of science and technology and the improvement of people's living standards, the demand for steam in various production fields has greatly increased, such as food processing, medical equipment disinfection, etc. Therefore, the requirements for steam generating equipment are getting higher and higher. The production of traditional steam is mainly obtained by boilers. The steam produced by boilers has the following disadvantages: 1. Since the boiler needs to burn coal during the working process, coal will produce a lot of waste gas during the combustion process. These waste gases are easy to cause environmental pollution and are not conducive to environmental protection. ; 2. The coal in the boiler has a low utilization rate of heat energy during the combustion process, which reduces the utilization rate of resources and the working efficiency of the boiler; 3. Using coal as a raw material has high production costs and is not easy to transport. Also increased the workload in the boiler operation process; 4, the existing boiler structural design is not reasonable enough, the safety performance is not reliable enough, inconvenient to use, and the heat energy utilization rate is low.

   The Chinese application with the application number CN201410395238.9 discloses a gas steam generator, which at least includes a water tank, a combustion chamber and a condensing flue. The water tank is divided into upper and lower parts, and a heat exchanger is arranged inside the lower water tank. A movable descaling window is opened on one side wall; a steam outlet is provided on one side of the top of the upper water tank, and a fan is provided on the opposite side; the combustion chamber is located on one side of the lower water tank, and the condensing flue is located in the lower part On the other side of the water tank, the heat exchange plate is distributed between the condensing flue and the combustion chamber; the hot gas generated by the combustion in the combustion chamber enters through the air inlet, passes through the curved channel, and is discharged into the condensing flue through the air outlet. ; The water tank is also provided with a float chamber communicated with the water tank, a float valve is provided in the float chamber, and the float valve includes a float ball, a connecting rod, a valve body and an adjustment seat. Though the structure of this invention application has improved the utilization rate of thermal energy to a certain extent, has reduced environmental pollution. However, this structure still has the following disadvantages: 1. The heat exchange channel is a bent channel, which consumes a lot of materials and increases the production cost; 2. It is inconvenient to clean the scale of the bent channel, and the operation is troublesome; and there are many dead ends in the welding of the bent channel It is prone to water leakage and has a short service life; 3. The heat exchange area is small, and the heat energy utilization effect is not good, which needs to be further improved.

Utility model content

The purpose of this utility model is to provide a steam generator, the heat exchanger structure of the steam generator is rationally designed, the evaporator can make full use of heat energy, save energy, the use of the evaporator is not easy to scale on the pipeline, and the dry burning of the evaporator is avoided problem, it is convenient to clean the dirt at the bottom of the water tank, and improve the working efficiency of the steam generator; the evaporator has a simple structure and is easy to use.

In order to solve the above technical problems, the utility model is realized through the following technical solutions.

A steam generator, comprising a water tank, a burner, and a heat exchanger arranged in the water tank, the heat exchanger includes a primary heat exchanger, a secondary heat exchanger, and the primary heat exchanger is located on the upper part of the water tank , the secondary heat exchanger is located at the lower part of the water tank, the primary heat exchanger includes a sealed cavity I, the secondary heat exchanger includes a sealed cavity II, and the combustion chamber of the burner passes through the primary The communication between the heat exchange tube and the sealed cavity I, the sealed cavity I communicates with the sealed cavity II through the secondary heat exchange tube, and the top and bottom of the sealed cavity I and the sealed cavity II are provided with A plurality of water passages, the sealed cavity II is provided with an exhaust pipe communicating with it, the exhaust pipe is connected to a suction fan, and a sewage discharge window is provided on the side wall of the lower part of the water tank.

The burner is installed on the side wall of the top of the water tank.

The secondary heat exchange tube 12 is connected to an end opposite to the end where the primary heat exchange tube 5 is located. Ensure that the hot air enters the sealed cavity I and conducts sufficient heat exchange with the water in the upper part of the water tank and the water in the water channel, and then enters the sealed cavity II from the secondary heat exchange tube to improve the utilization rate of heat energy.

The exhaust pipe is arranged on the end of the sealed cavity opposite to the connecting end of the secondary heat exchange tube. Ensure that the hot air entering the sealed cavity II from the sealed cavity I and the cold water in the water channel perform sufficient heat exchange before being discharged from the exhaust pipe to improve the utilization rate of heat energy.

A water level detection device is also installed on the side wall of the area where the primary heat exchanger on the upper part of the water tank is located.

The water level detection device includes an airtight box in which a high temperature resistant floating ball inlet valve is installed, the top of the airtight box is inserted with a water level monitoring electrode, and the bottom of the airtight box is connected to the water tank through a pipeline The area where the secondary heat exchanger is located. The water level monitoring device is used for automatic water intake and anti-dry protection function. The bottom of the airtight tank is connected to the area where the third-stage heat exchanger is located in the middle of the water tank through pipes, so that the water at normal temperature can directly reach the third-stage heat exchanger for exchange. The heat is used to reduce the exhaust gas discharge temperature of the steam generator, so as to achieve the purpose of efficient utilization of gas heat energy.

Further, there are 8 primary heat exchange tubes. It has been proved by practice that if there are less than eight first-level heat exchange tubes, the heat energy is not fully utilized and the heating effect is poor. High utilization rate and low equipment cost.

Further, the primary heat exchange tube is a square tube. The square heat exchange tube can ensure sufficient heat exchange area, reduce the amount of tube material, reduce equipment cost,

Beneficial effect:

Compared with the prior art, the utility model has the following advantages:

1. The energy source of the steam generator of the present invention is gas, which greatly reduces environmental pollution; the primary heat exchanger of the present invention is located on the upper part of the water tank, and the burner is also located on the upper part of the water tank, basically at the same height, and the high-temperature hot gas is transported The distance is short, so that the high-temperature hot gas in the combustion chamber quickly enters the sealed cavity I through the first-stage heat exchange tube, which avoids the loss of heat during the long-distance transportation of the hot gas and improves the utilization rate of heat energy. The high-temperature hot gas enters the sealed cavity I on the upper part of the water tank, and after heat exchange, it passes through the secondary heat exchange tube to seal the cavity II. In this way, the high-temperature hot gas directly enters the secondary heat exchanger after exchanging heat with the water in the lower part of the water tank. The heat exchanger exchanges heat with the water in the upper part of the water tank. The temperature difference between the lower part of the water tank and the upper part of the water tank is large, which accelerates the convection of the water during the heating process, accelerates the heat transfer, improves the absorption rate of heat energy, and quickly heats up the water, which greatly shortens the steam output. At the same time, this structure has a large heat exchange area, and there is no need to design a bent channel to increase the heat exchange area as in the background technology. The scale is easy to clean, the structure is simple, and the consumables are less. A number of water passages are provided between the top and the bottom of the sealed cavity II and the sealed cavity III to fully absorb the heat in the sealed cavity.

The utility model provides a sewage discharge window on the side wall of the lower part of the water tank, so that when the dirt falls to the bottom of the water tank, only the sewage discharge window needs to be opened, and the dirt can be taken out by hand or tools, and the sewage discharge work is simple and effective.

2. The secondary heat exchange tubes and water channels of the utility model are arranged vertically, which is not easy to accumulate scale, effectively improves or avoids the problem of easy scale formation in the horizontal setting of the pipeline, avoids the problem of dry burning of the steam generator, and prolongs the life of the steam generator. Practical life.

Description of drawings

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

Fig. 2 is a structural schematic diagram of the heat exchanger of the present invention.

1 exhaust fan, 2 water tank, 3 water channel, 4 sealed chamber Ⅰ, 5 primary heat exchange tube, 6 combustion chamber, 7 burner, 8 sewage window, 9, water level monitoring electrode, 10 high temperature resistant floating ball water inlet valve , 11 airtight box, 12 secondary heat exchange tube, 13 sealed cavity II, 14 exhaust pipe.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment illustrate the utility model.

As shown in Figures 1 and 2, a steam generator includes a water tank 2, a burner 7 arranged on the outer wall of the upper part of the water tank, and a heat exchanger arranged in the water tank 2, and the heat exchanger includes a primary heat exchanger Heater, secondary heat exchanger, the primary heat exchanger is located in the upper part of the water tank 2, the secondary heat exchanger is located in the lower part of the water tank 2, the primary heat exchanger includes a sealed cavity I4, the The secondary heat exchanger includes a sealed cavity II13, the combustion chamber 6 of the burner communicates with the sealed cavity I4 through the primary heat exchange tube 5, and the sealed cavity I4 communicates with the sealed cavity I4 through the secondary heat exchange tube 12 II13 is connected, and several water passages 3 are arranged between the top and the bottom of the sealed cavity I4 and the sealed cavity II13, and the sealed cavity II13 is provided with an exhaust pipe 14 communicating with it. The pipe 14 is connected with the exhaust fan 1, and the side wall of the lower part of the water tank 2 is provided with a sewage discharge window 8. The working process of the steam generator is as follows: the burner 7 is turned on, and the hot gas in the combustion chamber 6 enters the sealed cavity I4 of the first-stage heat exchanger through the primary heat exchange tube to exchange heat with the water in the upper part of the water tank 1, and the hot gas after the heat exchange It enters the sealed cavity II13 at the lower part of the water tank 2 along the secondary heat exchange tube 12, and performs heat exchange with the water at the lower part of the water tank 2, so that after the secondary heat exchange, the heat of the hot air is fully utilized, and then in the exhaust fan 1 Under the action, it is discharged along the exhaust pipe 2. After a period of use, a large amount of dirt was deposited at the bottom of the water tank 2. At this time, the sewage window 8 is opened, and the dirt is taken out from the sewage window 8 deep into the water tank 2 with hands or tools.

As a further improvement of the present invention, as shown in FIG. 1 and FIG. 2 , the secondary heat exchange tube 12 is connected to an end opposite to the end where the primary heat exchange tube 5 is located. It is ensured that the hot air enters the sealed cavity I4 to fully exchange heat with the cold water in the water channel 3, and then enters the sealed cavity II13 from the secondary heat exchange tube 12, so as to improve the utilization rate of heat energy.

As a further improvement of the present invention, as shown in Fig. 1 and Fig. 2, the exhaust pipe 14 is arranged at the end of the sealed cavity II opposite to the connecting end of the secondary heat exchange pipe 12. The hot air in the sealed cavity II13 fully exchanges heat with the water in the upper part of the water tank 2 and the water channel 3 and then is discharged from the exhaust pipe 14 to improve the utilization rate of heat energy.

As a further improvement of the present utility model, as shown in FIG. 1 , a water level detection device is installed on the side wall of the area where the primary heat exchanger on the upper part of the water tank 2 is located. The water level detection device includes an airtight box 11, which is provided with a high temperature resistant float water inlet valve 10, the top of the airtight box 11 is inserted into the water level monitoring electrode 9, and the bottom of the airtight box 11 passes through The pipe is connected to the area where the secondary heat exchanger in the water tank 2 is located. The water level monitoring device is used for automatic water intake and anti-dry protection function. The bottom of the airtight box 11 is connected to the area where the third-stage heat exchanger is located in the middle of the water tank through pipes, so that the water at normal temperature can directly reach the third-stage heat exchanger for heating. Heat exchange is used to reduce the exhaust gas discharge temperature of the steam generator, so as to achieve the purpose of efficient utilization of gas heat energy.

As a further improvement of the present utility model, there are eight primary heat exchange tubes 5 . It has been proved by practice that if the first-stage heat exchange tubes are less than eight, the heat energy is not fully utilized, and the heating effect is poor. If the extra eight tubes are wasted, the equipment cost will be increased. Ensure high utilization rate of heat energy and low equipment cost. The primary heat exchange tube 5 is a square tube. Square heat exchange tubes can ensure sufficient heat exchange area, reduce the amount of tubes used, and reduce equipment costs.

Claims (7)

1. A steam generator, characterized in that: it comprises a water tank (2), a burner (7) arranged on the upper outer side wall of the water tank, a heat exchanger arranged in the water tank (2), and the heat exchanger comprises Primary heat exchanger, secondary heat exchanger, the primary heat exchanger is located in the upper part of the water tank (2), the secondary heat exchanger is located in the lower part of the water tank (2), and the primary heat exchanger includes Sealed cavity I (4), the secondary heat exchanger includes sealed cavity II (13), the combustion chamber (6) of the burner is connected to the sealed cavity I (4) through the primary heat exchange tube (5) ), the sealed cavity I (4) communicates with the sealed cavity II (13) through the secondary heat exchange tube (12), the sealed cavity I (4), the sealed cavity II (13) A number of water passages (3) are provided between the top and the bottom, and the sealed cavity II (13) is provided with an exhaust pipe (14) connected to it, and the exhaust pipe (14) is connected to an exhaust fan ( 1), the lower side wall of the water tank (2) is provided with a sewage discharge window (8). 2. A steam generator according to claim 1, characterized in that: the secondary heat exchange tube (12) is connected to an end opposite to the end where the primary heat exchange tube (5) is located. 3. A steam generator according to claim 1, characterized in that: the exhaust pipe (14) is arranged at the end of the sealed cavity II opposite to the connecting end of the secondary heat exchange pipe (12). 4. A steam generator according to claim 1, characterized in that: a water level detection device is also installed on the side wall of the area where the primary heat exchanger on the upper part of the water tank (2) is located. 5. A steam generator according to claim 4, characterized in that: the water level detection device includes a closed box (11), and a high temperature resistant floating ball water inlet valve (10) is arranged in the closed box , the top of the airtight box (11) is inserted into the water level monitoring electrode (9), and the bottom of the airtight box (11) is connected to the area where the secondary heat exchanger in the water tank (2) is located through a pipeline. 6. A steam generator according to claim 1, characterized in that there are 8 primary heat exchange tubes (5). 7. The steam generator according to claim 1, characterized in that: the primary heat exchange tube (5) is a square tube.