CN108592064A - A kind of horizontal burning oil fuel gas steam boiler - Google Patents

Abstract

The present invention relates to a kind of horizontal burning oil fuel gas steam boilers, can be recycled to the heat in heat smoke, and remove most of dust in flue gas comprising boiler body, waste heat recovering mechanism, dedusting mechanism, air-introduced machine and chimney；Waste heat recovering mechanism includes waste heat recovery babinet and heat exchange coil；Dedusting mechanism includes dust-removing box, lower filter screen, elevator pump, spray tube and upper filter screen；Horizontal connection has partition board in dust-removing box, dust-removing box inner cavity is divided into dirt pocket and filter chamber by partition board, dirt pocket and filter chamber are arranged in high-low-position, air outlet, air inlet and overflow port are offered on dirt pocket, air outlet is connected to by discharge pipe with air-introduced machine, air-introduced machine is also connected to by exhaust duct with chimney, and air inlet is connected to by blast pipe with heat exchange coil；Lower filter screen and elevator pump are equipped in filter chamber, lower filter screen is located at below the water inlet of filter chamber；Spray tube and upper filter screen are equipped in dirt pocket, spray tube is connected to by return pipe with elevator pump.

Description

A horizontal fuel gas steam boiler

technical field

The invention relates to the field of boilers, in particular to a horizontal fuel gas steam boiler.

Background technique

The boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of heat energy. During the use of the boiler, the exhausted flue gas contains a lot of heat and dust. If it is directly discharged, it will cause a lot of waste of heat energy and cause great pollution to the environment. The dust contained in the flue gas is suspended in the atmosphere. It will have extremely adverse effects on the human respiratory system, atmospheric visibility and urban landscape.

Contents of the invention

The present invention just aims at the deficiencies in the prior art, and provides a horizontal fuel-fired gas-fired steam boiler.

In order to solve the above problems, the technical scheme adopted in the present invention is as follows:

A horizontal oil-fired gas-fired steam boiler, including a boiler body, a waste heat recovery mechanism, a dust removal mechanism, an induced draft fan and a chimney;

The waste heat recovery mechanism includes a waste heat recovery box and a heat exchange coil. The waste heat recovery box is provided with a water inlet and a water outlet. The furnace of the boiler body is connected, and an electric control valve is provided at the water outlet. The heat exchange coil is connected to the waste heat recovery box, and its two ends are respectively connected to the boiler body and the dust removal mechanism through pipes, wherein , the pipeline between the heat exchange coil and the boiler body is provided with a pre-filter;

The dust removal mechanism includes a dust removal box, a lower filter, a lifting pump, a spray pipe and an upper filter; the inside of the dust removal box is horizontally connected with a partition, and the partition divides the inner cavity of the dust removal box into a dust removal chamber. and the filter chamber, the dust removal chamber and the filter chamber are arranged at high and low positions, and the dust removal chamber is provided with an air outlet, an air inlet and an overflow port, and the air outlet, air inlet and overflow port are arranged from top to bottom Arranged sequentially, the air outlet is communicated with the induced draft fan through an air outlet pipe, the induced draft fan is also communicated with the chimney through an exhaust pipe, and the air inlet is communicated with the heat exchange coil through an air intake pipe; The filter chamber is provided with a lower filter screen and a lifting pump, and the lower filter screen is located below the water inlet of the filter chamber; a spray pipe and an upper filter screen are provided in the dust removal chamber, and the spray pipe is located in the Between the air outlet and the air inlet, the spray pipe communicates with the lift pump through the water return pipe, and the upper filter is located between the spray pipe and the air inlet.

Preferably, the spray pipe is provided with a plurality of atomizing nozzles along the length direction, and the water outlets of the atomizing nozzles are arranged facing the upper filter net.

Preferably, the upper filter screen is in an upwardly arched arc structure.

Preferably, the dust removal equipment further includes a stirring mechanism, the stirring mechanism includes a rotating shaft and stirring blades, the rotating shaft is arranged horizontally, and the rotating shaft is connected with a variable frequency motor located outside the stirring box, and is driven by the variable frequency motor Rotate, the stirring blade is sleeved on the outer periphery of the rotating shaft, and the stirring blade is partly located above the liquid level of the dust removal liquid in the dust removal chamber.

Preferably, the top of the box is in an upwardly arched arc structure.

Preferably, the heat exchange coil is arranged as a spiral coil, and its air inlet and air outlet are respectively located on both sides of the waste heat recovery box. The heat exchange coil is provided with a plurality of heat dissipation fins, and the heat dissipation fins The fins are evenly distributed along the outer wall of the heat exchange coil.

Preferably, a thermometer and/or a liquid level gauge are provided in the waste heat recovery box.

The present invention compares with prior art, and implementation effect of the present invention is as follows:

After the hot flue gas is discharged from the boiler body, the pre-filter effectively filters the large particle impurities in the hot flue gas to prevent the large particle impurities from blocking the heat exchange coil, so that the subsequent heat exchange and dust removal processes can proceed smoothly.

After the hot flue gas enters the heat exchange coil, it exchanges heat with the water in the waste heat recovery box, part of the heat in the hot flue gas is transferred to the water in the waste heat recovery box, and the water temperature rises. Open the electric control valve, and the hot water in the waste heat recovery box will flow back to the boiler body through the pipeline, realizing the effective utilization of heat. Because the disc structure of the heat exchange coil can prolong the flow time of the hot flue gas in the heat exchange coil, the heat utilization rate is higher.

After the flue gas passes through the heat exchange coil, it enters the dust removal chamber through the air inlet, and runs from bottom to top; the lift pump sprays the dust removal liquid in the dust removal box through the spray pipe, and the sprayed dust removal liquid moves from top to bottom. During the movement of the dust removal liquid and the flue gas in opposite directions, the dust removal liquid is in full contact with the flue gas, and the dust removal liquid drives the particulate impurities in the flue gas and deposits them in the dust removal chamber, thereby achieving the effect of dust removal.

The upper filter is located between the air inlet and the spray pipe. When the spray pipe sprays the dedusting liquid downward, the dedusting liquid forms a water film on the upper filter. Diffusion outward through the upper filter net, thereby improving the dust removal effect. In addition, when the dedusting liquid is sprayed, the dedusting liquid can also wash off the particles and impurities adsorbed on the upper filter net to ensure the filtering effect of the upper filter net.

When the spray pipe is spraying the dedusting liquid downward, the liquid level in the dedusting chamber is rising continuously. When the liquid level of the dedusting liquid reaches the position of the overflow port, the dedusting liquid enters the filter chamber through the overflow port, the outlet pipe and the water inlet in turn. , since the lower filter screen is located below the water inlet of the filter chamber, the dust removal liquid is firstly filtered by the lower filter screen after entering the filter chamber, and the particulate impurities mixed in the dust removal liquid are isolated from the lower filter screen, so that the lift pump can move toward the The relatively clean dedusting liquid is pumped into the spray pipe, and the dedusting liquid can guarantee the dedusting effect of the flue gas.

During the dust removal process, the induced draft fan operates to generate negative pressure at the air outlet of the dust removal box, and the dust-removed flue gas enters the chimney through the outlet pipe and exhaust pipe, and is discharged into the atmosphere through the chimney.

Description of drawings

Fig. 1 is a schematic structural view of a horizontal fuel-fired gas-fired steam boiler proposed by the present invention.

Detailed ways

The content of the present invention will be described below in conjunction with specific embodiments.

As shown in Figure 1, Figure 1 is a schematic structural view of a horizontal fuel-fired gas-fired steam boiler proposed by the present invention.

Referring to FIG. 1 , a horizontal oil-fired gas-fired steam boiler proposed by the present invention includes a boiler body 17 , a waste heat recovery mechanism, a dust removal mechanism, an induced draft fan 13 and a chimney 15 .

The boiler body is a horizontal oil-fired gas-fired steam boiler that can be purchased on the market, which includes a shell, a furnace and a furnace.

The waste heat recovery mechanism includes a waste heat recovery box 18 and a heat exchange coil 21. The waste heat recovery box 18 is provided with a water inlet 19 and a water outlet 20, and the water inlet 19 communicates with an external water supply mechanism through a pipeline. The water outlet 20 communicates with the furnace of the boiler body 17 through a pipeline, and an electric control valve 25 is provided at the water outlet 20. The heat exchange coil 21 is connected in the waste heat recovery box 18, and its two ends are respectively It communicates with the boiler body 17 and the dust removal mechanism through pipelines, wherein a pre-filter 23 is provided on the pipeline between the heat exchange coil 21 and the boiler body 17 .

The dust removal mechanism includes a dust removal box body 1 , a lower filter screen 4 , a lift pump 5 , a spray pipe 7 and an upper filter screen 11 . The dust removal box 1 is horizontally connected with a partition 2, and the partition 2 divides the inner cavity of the dust removal box 1 into a dust removal room and a filter room, and the dust removal room and the filter room are arranged at high and low positions. The dust removal chamber is provided with an air outlet, an air inlet and an overflow port, and the air outlet, air inlet and overflow port are arranged sequentially from top to bottom, and the air outlet communicates with the induced draft fan 13 through an air outlet pipe , the induced draft fan 13 is also communicated with the chimney 15 through an exhaust pipe, and the air inlet is communicated with the heat exchange coil 21 through an air inlet pipe 16 . A lower filter screen 4 and a lifting pump 5 are arranged in the filter chamber, and the lower filter screen 4 is located below the water inlet of the filter chamber. The dust removal chamber is provided with a spray pipe 7 and an upper filter screen 11, the spray pipe 7 is located between the air outlet and the air inlet, and the spray pipe 7 communicates with the lift pump 5 through the return pipe 6 , the upper filter screen 11 is located between the spray pipe 7 and the air inlet.

In the above scheme, after the hot flue gas is discharged from the boiler body 17, the pre-filter 23 effectively filters the large particle impurities in the hot flue gas to prevent the large particle impurities from blocking the heat exchange coil 21, so that the subsequent heat exchange and dust removal processes be carried out smoothly.

After the hot flue gas enters the heat exchange coil 21, it exchanges heat with the water in the waste heat recovery box 18, part of the heat in the hot flue gas is transferred to the water in the waste heat recovery box 18, and the water temperature rises. The electric control valve 25 is opened, and the hot water in the waste heat recovery box 18 flows back into the boiler body 17 through the pipeline, thereby realizing effective utilization of heat. Since the disk-shaped structure of the heat exchange coil 21 can prolong the flow time of the hot flue gas in the heat exchange coil 21 , the heat utilization rate is higher.

The flue gas enters the dedusting chamber through the air inlet after passing through the heat exchange coil 21, and runs from bottom to top; the lifting pump 5 sprays the dedusting liquid in the dedusting box through the spray pipe 7, and the sprayed dedusting liquid is from top to bottom During the movement of the dust removal liquid and the flue gas in the opposite direction, the dust removal liquid is in full contact with the flue gas, and the dust removal liquid drives the particulate impurities in the flue gas and deposits them in the dust removal chamber, thereby achieving the effect of dust removal.

The upper filter screen 11 is located between the air inlet and the spray pipe 7. When the spray pipe 7 sprays the dust removal liquid downward, the dust removal liquid forms a water film on the upper filter screen 11, and the water film absorbs the particulate impurities in the flue gas. , to prevent particulate impurities from diffusing outward through the upper filter screen 11, thereby improving the dust removal effect. In addition, when the dedusting liquid is sprayed, the dedusting liquid can also wash down the particulate impurities adsorbed on the upper filter screen 11 , ensuring the filtering effect of the upper filter screen 11 .

When the spray pipe 7 sprays the dedusting liquid downward, the liquid level in the dedusting chamber is continuously rising. When the liquid level of the dedusting liquid reaches the position of the overflow port, the dedusting liquid enters through the overflow port, the outlet pipe 3 and the water inlet in turn. In the filter room, since the lower filter screen 4 is located below the water inlet of the filter room, the dust removal liquid is first filtered by the lower filter screen 4 after entering the filter room, and the particulate impurities mixed in the dust removal liquid are isolated from the lower filter screen 4. The lift pump 5 can pump relatively clean dedusting liquid into the spray pipe 7, and the dedusting liquid can guarantee the dedusting effect of the flue gas.

During the dust removal process, the induced draft fan 13 operates to generate negative pressure at the air outlet of the dust removal box 1, and the dust-removed flue gas enters the chimney 15 through the outlet pipe 12 and the exhaust pipe 14, and is discharged into the atmosphere through the chimney 15 .

In order to increase the contact area between the flue gas and the dedusting liquid, so that the dedusting liquid can fully absorb the particulate impurities from the flue gas, in some embodiments, the spray pipe 7 is provided with multiple atomizers along the length direction. The spray head 8, the water outlet of the atomizing spray head 8 is arranged facing the upper filter screen 11.

In some embodiments, the upper filter screen 11 has an upwardly arched arc structure, and this design can increase the surface area of the upper filter screen 11, so that the contact area between the upper filter screen 11 and the flue gas is larger. It helps to improve the filtering effect of flue gas.

In some embodiments, the dust removal equipment also includes a stirring mechanism, the stirring mechanism includes a rotating shaft 9 and a stirring blade 10, the rotating shaft 9 is arranged horizontally, and the rotating shaft 9 is connected to the frequency conversion motor outside the stirring box. , and driven by the frequency conversion motor, the stirring blade 10 is set on the outer periphery of the rotating shaft 9, and the stirring blade 10 is partly located above the liquid level of the dust removal liquid in the dust removal chamber.

The frequency conversion motor drives the rotating shaft 9 to drive the stirring blade 10 to rotate. The stirring blade 10 takes away part of the dust removal liquid during the rotation process. The dust removal liquid is thrown out by the centrifugal force and contacts with the flue gas during the movement, which further improves the dust removal effect.

In some embodiments, the top of the box is in an upwardly arched arc structure, and this design can increase the volume of the dust removal box 11, thereby improving the treatment capacity of the flue gas.

In some embodiments, the heat exchange coil 21 is arranged as a spiral coil, and its air inlet and air outlet are respectively located on both sides of the waste heat recovery box 18. The heat exchange coil 21 is provided with a plurality of heat dissipation Fins 22 , the heat dissipation fins 22 are evenly distributed along the outer wall of the heat exchange coil 21 . By optimizing the design of the heat exchange coil 21 , the residence time of the hot flue gas in the heat exchange coil 21 can be prolonged, and the heat exchange efficiency between the hot flue gas and water can be increased.

In some embodiments, the waste heat recovery box 18 is provided with a thermometer 24 and/or a liquid level gauge 24, the temperature of the water in the waste heat recovery box can be collected through the thermometer 24, and the electric control valve can be opened when the use requirement is met. 25, so that the water in the waste heat recovery box 18 flows back into the boiler body 17. The liquid level gauge 24 can be used to collect the liquid level in the waste heat recovery tank, so as to facilitate water injection into the waste heat recovery tank 18 through the water inlet 19 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (7)

1. A horizontal fuel-fired gas-fired steam boiler, comprising a boiler body, characterized in that it also includes: a waste heat recovery mechanism, a dust removal mechanism, an induced draft fan and a chimney; The waste heat recovery mechanism includes a waste heat recovery box and a heat exchange coil. The waste heat recovery box is provided with a water inlet and a water outlet. The furnace of the boiler body is connected, and an electric control valve is provided at the water outlet. The heat exchange coil is connected to the waste heat recovery box, and its two ends are respectively connected to the boiler body and the dust removal mechanism through pipes, wherein , the pipeline between the heat exchange coil and the boiler body is provided with a pre-filter; The dust removal mechanism includes a dust removal box, a lower filter, a lifting pump, a spray pipe and an upper filter; the inside of the dust removal box is horizontally connected with a partition, and the partition divides the inner cavity of the dust removal box into a dust removal chamber and the filter chamber, the dust removal chamber and the filter chamber are arranged at high and low positions, and the dust removal chamber is provided with an air outlet, an air inlet and an overflow port, and the air outlet, air inlet and overflow port are arranged from top to bottom Arranged in sequence, the air outlet is communicated with the induced draft fan through an air outlet pipe, the induced draft fan is also communicated with the chimney through an exhaust pipe, and the air inlet is communicated with the heat exchange coil through an air intake pipe; The filter chamber is provided with a lower filter screen and a lifting pump, and the lower filter screen is located below the water inlet of the filter chamber; a spray pipe and an upper filter screen are provided in the dust removal chamber, and the spray pipe is located in the Between the air outlet and the air inlet, the spray pipe communicates with the lift pump through the water return pipe, and the upper filter is located between the spray pipe and the air inlet. 2. The horizontal fuel gas steam boiler according to claim 1, characterized in that, the spray pipe is provided with a plurality of atomizing nozzles along the length direction, and the water outlet of the atomizing nozzles is facing the upper Filter settings. 3. The horizontal fuel-fired gas steam boiler according to claim 1, characterized in that, the upper filter screen is in an upwardly arched arc structure. 4. The horizontal fuel-fired gas-fired steam boiler according to claim 1, characterized in that, the dust removal equipment also includes a stirring mechanism, the stirring mechanism includes a rotating shaft and stirring blades, the rotating shaft is arranged horizontally, and the rotating shaft is located at the The frequency conversion motor outside the stirring box is driven and connected, and is driven to rotate by the frequency conversion motor. The stirring blade is set on the outer periphery of the rotating shaft, and the stirring blade is partly located above the liquid level of the dust removal liquid in the dust removal chamber. 5. The horizontal fuel-fired gas steam boiler according to claim 1, characterized in that, the top of the box body is in an upwardly arched arc structure. 6. The horizontal fuel-fired gas-fired steam boiler according to claim 1, characterized in that, the heat exchange coil is arranged as a spiral coil, and its air inlet and air outlet are respectively located on both sides of the waste heat recovery box, and the A plurality of heat dissipation fins are arranged on the heat exchange coil, and the heat dissipation fins are evenly distributed along the outer wall of the heat exchange coil. 7. The horizontal oil-fired gas-fired steam boiler according to claim 1, wherein a thermometer and/or a liquid level gauge are arranged in the waste heat recovery box.