JP2018164874A - Neutralizer and combustion device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a neutralization device capable of suppressing the drain introduction port from being clogged with soot or the like. SOLUTION: In the neutralization device 27 for neutralizing the drain generated when the combustion gas has a temperature equal to or lower than the dew point by circulating the drain inside the container 40 filled with the neutralizing agent, A cylindrical drain introduction part 41 having a drain introduction port 41a for allowing the drain to flow into the container 40 is provided, and the tip of the drain introduction part 41 is formed in a diagonally cut shape, and the drain introduction port 41a is substantially elliptical. By forming the drain introduction port 41a, the opening area of the drain introduction port 41a becomes large, and even if impurities such as soot adhere to and accumulate on the inner edge of the drain introduction port 41a, they are unlikely to be blocked, and if the deposits are about to be blocked, Even if it grows, it can be easily drained off by the drain, and clogging of the drain introduction port 41a due to impurities such as soot can be suppressed. [Selection diagram]

Description

  The present invention relates to a neutralizer for neutralizing drain and a combustion apparatus having the neutralizer.

  Conventionally, in this type of combustion apparatus, a combustion section, a heat exchanger that exchanges heat with combustion gas generated by combustion in the combustion section, and a neutralization apparatus that neutralizes drain generated by heat exchange in the heat exchanger, The neutralizer device includes a container containing a neutralizing agent therein, and is provided with a cylindrical drain introduction portion formed upright on the upper wall portion of the container, and at the tip of the drain introduction portion. Has a drain introduction port as an opening for introducing the drain. (For example, refer to Patent Document 1.)

JP 2007-3094 A

  By the way, in such a combustion apparatus, drain is generated with combustion, soot is also generated by the combustion, drain and soot flow into the neutralization apparatus, and the opening area of the drain introduction port is small In the long-term use, impurities such as soot are gradually accumulated at the drain inlet, the drain inlet is clogged and clogged, and the drain does not flow to the neutralizer but accumulates on the heat exchanger side. There was a risk of problems such as poor combustion.

  In order to solve the above-mentioned problems, the present invention is configured in particular in claim 1 to circulate the drain produced when the combustion gas is at a temperature lower than the dew point through the container filled with the neutralizing agent. In the neutralizing device for neutralization, the container is provided with a cylindrical drain introduction part having a drain introduction port for allowing the drain to flow into the container, and the tip of the drain introduction part is cut obliquely. The drain inlet is formed in a substantially elliptical shape.

  Moreover, in Claim 2, the heat exchanger which heat-exchanges with a combustion part, the combustion gas produced | generated by combustion of this combustion part, and the neutralization apparatus which neutralizes the drain produced | generated by the heat exchange in this heat exchanger The neutralizing device according to claim 1 is used as the neutralizing device.

  According to the first aspect of the present invention, the distal end portion of the drain introduction portion is formed in an obliquely cut shape, and the drain introduction port is formed in an approximately elliptical shape, so that the opening area of the drain introduction port is large. Even if impurities such as soot adhere to and accumulate on the inner edge of the drain inlet, it is difficult to block, and even if the deposit grows until it seems to close, it can be easily drained by the drain. Clogging due to impurities such as soot can be suppressed.

  According to claim 2, a heat exchanger for exchanging heat with the combustion gas generated by the combustion of the combustion section, a neutralizer for neutralizing drain generated by heat exchange in the heat exchanger, By using the neutralization device according to claim 1 as a neutralization device, a combustion device having a neutralization device that exhibits the above-described effects can be provided.

The schematic block diagram of the combustion apparatus which has the neutralization apparatus of one Embodiment of this invention. Sectional drawing of the principal part of the neutralization apparatus of the same embodiment. The figure which expanded and demonstrated the drain introduction part in the neutralization apparatus of the same embodiment, and the drain introduction part in the neutralization apparatus of a 1st comparative example.

An embodiment of a neutralization apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a combustion apparatus having a neutralization apparatus according to an embodiment of the present invention, and details will be described below.

  1 is a latent heat recovery type hot water supply device as a combustion device, 2 is a vaporizer that vaporizes fuel such as petroleum, 3 is a vaporizer that is provided in the vaporizer 2 and heats the fuel to a vaporizable temperature, and 4 is a vaporizer 2 A vaporization temperature sensor 5 for detecting temperature communicates with the vaporizer 2 and premixes the vaporized gas vaporized by the vaporizer 2 and primary air, 6 is provided at the bottom of the mixing chamber 5 and heats the mixing chamber 5 The mixing chamber heater, 7 is a mixing chamber temperature sensor for detecting the temperature of the mixing chamber 5, 8 is a burner that communicates with the mixing chamber 5 and burns the premixed gas premixed in the mixing chamber 5, and 9 A plurality of heat-absorbing fins protruding on the burner 8 at the back of the vaporizer 2 feed back combustion heat to the vaporizer 2 and suppress the energization amount of the vaporization heater 3 and the mixing chamber heater 6 as much as possible.

  10 is a nozzle for spraying fuel oil on the vaporizer 2, 11 is an electromagnetic pump for pumping fuel oil to the nozzle 10 via an oil feed pipe 12, 13 is a combustion fan, and an inlet of the vaporizer 2 and a burner 8 via an air passage 14 Combustion air that is communicated with the air chamber 16 between the cover frame 15 and sucked from the suction port 17 is supplied to the vaporizer 2 as primary air for premixing, and the air chamber 16 is connected to the side of the vaporizer 2. It is supplied as secondary air combusted by the burner 8 from the lower side of the mixing chamber 5.

  18 is a heat exchanger accommodated in the combustion chamber 19, and this heat exchanger 18 collects sensible heat from the combustion gas generated by the combustion of the burner 8 and heats the water flowing through the primary heat receiving pipe 20. A primary heat exchanger 21 and a secondary heat exchanger 23 that recovers latent heat from the combustion gas after passing through the primary heat exchanger 21 and heats water flowing through the secondary heat receiving pipe 22. The primary heat exchanger 21 is arranged above the primary heat exchanger 21, and the secondary heat exchanger 23 is arranged above the primary heat exchanger 21, and passes through the primary heat exchanger 21 and the secondary heat exchanger 23 in this order. The burned combustion gas is exhausted from the exhaust port 24 to the outside of the latent heat recovery hot water supply device 1.

  25 is a drain receiver that recovers the drain that is generated when the water vapor in the combustion gas exchanges heat with the water flowing through the secondary heat receiving pipe 22 of the secondary heat exchanger 23 to a temperature below the dew point. 25 is disposed above the primary heat exchanger 21 and below the secondary heat exchanger 23, and here, a corrosion-resistant housing (not shown) constituting the secondary heat exchanger 23. The bottom plate is a drain receiver 25. A drain pipe 26 guides the drain collected by the drain receiver 25 to the neutralizing device 27.

  28 is a water supply pipe for circulating water supplied from a water supply source to the heat exchanger 18, 29 is for circulating hot water heated by the heat exchanger 18, and hot water is supplied to a hot water tap (not shown) provided at a predetermined location. The hot water supply pipe 30 is a water supply bypass pipe branched from the water supply pipe 28, and hot water is supplied through the primary heat receiving pipe 20, the secondary heat receiving pipe 22, the water supply pipe 28, the hot water supply pipe 29, and the water supply bypass pipe 30. It constitutes a circuit.

  A mixing valve 31 is provided at a connecting portion between the hot water supply pipe 29 and the water supply bypass pipe 30, mixes hot water from the hot water supply pipe 29 and water from the water supply bypass pipe 30, and 32 can change the mixing ratio. 28 is a water supply temperature sensor that detects the temperature of the water supply, 33 is a flow rate sensor that is provided in the water supply pipe 28 and detects the flow rate, and 34 is a temperature sensor that is provided in the hot water supply pipe 29 and that is heated by the heat exchanger 18. A heat exchange outlet temperature sensor 35 is a hot water supply temperature sensor that is provided in the hot water supply pipe 29 and detects the temperature of the hot water mixed by the mixing valve 31.

  36 is built in the latent heat recovery type hot water supply apparatus 1 and receives signals from the sensors of the latent heat recovery type hot water supply apparatus 1 with a microcomputer as a main body. Control means for controlling driving.

  A remote controller 37 is communicably connected to the control means 36 and remotely controls the latent heat recovery type hot water supply apparatus 1. The remote control 37 is an operation switch 38 for instructing on / off operation of the latent heat recovery type hot water supply apparatus 1 and a hot water supply temperature. The operation part 39 which consists of a hot water supply temperature setting switch etc. for setting is provided.

  Next, the neutralizing device 27 will be described with reference to FIGS. 2 to 3. Reference numeral 40 denotes a box-shaped container, which is a blow molded product made of a synthetic resin, and a neutralizer (calcium carbonate) is contained in the container 40. Etc.) is filled.

  The upper wall portion 40a of the vessel 40 is provided with a drain introduction portion 41 for allowing the drain generated in the secondary heat exchanger 23 to flow into the vessel 40 of the neutralization device 27. It is a cylindrical tube body extending upward from the wall 40a, and a drain introduction port 41a is formed at the tip of the tube as an opening for allowing the drain to flow. A drain pipe 26 is connected to the drain introduction part 41, and drain is supplied to the drain introduction part 41 through the drain pipe 26.

  42 is a water level detection chamber that communicates with the drain introduction part 41 and detects a water level abnormality when the water level of the drain in the container 40 rises abnormally. The water level detection chamber 42 detects the water level of the drain. The pair of electrodes 43 are inserted. The water level detection chamber 42 is not filled with a neutralizing agent.

  A first neutralization chamber 44 communicates with the water level detection chamber 42 via a narrow slit 45, and a second intermediate 46 communicates with the first neutralization chamber 44 via a communication passage 47 formed in the lower part of the container 40. Japanese-style room. The first neutralization chamber 44 and the second neutralization chamber 46 are filled with a neutralizing agent, and the drain is neutralized here.

  Further, a drain discharge portion 48 for discharging the neutralized drain is provided on the side wall on the most downstream side in the drain flow direction of the second neutralization chamber 46, and the drain in the container 40 is drawn out at the bottom. A drainage part 49 is provided. In addition, the drainage part 49 is normally plugged and closed.

  Here, the relationship between the drain introduction part 41 of the neutralization apparatus 27 of this embodiment used as the principal part of this invention, and the drain introduction part 101 of the conventional neutralization apparatus (cited literature reference 1 description) as a 1st comparative example. Will be described with reference to FIG.

  FIG. 3A is an enlarged view of a main part around the drain introduction part 41 of the neutralization device 27 in FIG. 2 and an enlarged perspective view of the drain introduction part 41. As shown in FIG. The drain introduction part 41 has a cylindrical shape and is formed in a shape having its tip cut obliquely, and a drain introduction port 41a is formed flush with the tip surface (oblique cut surface) of the drain introduction part 41. The drain introduction port 41a is a substantially elliptical opening having an opening area S. In addition, the drain introduction part 41 has comprised the shape like a bamboo basket as a whole.

  And FIG.3 (b) is the principal part enlarged view of the drain introduction part 101 periphery of the conventional neutralization apparatus, and the expansion perspective view of the drain introduction part 101, As FIG.3 (b) shows, The drain introduction part 101 has a cylindrical shape, and its tip is formed in a horizontally cut shape, and a drain introduction port 101a is formed flush with the tip surface (horizontal plane) of the drain introduction part 101. The introduction port 101a is an opening having an opening area T. Here, if the drain introduction portion 101 and the drain introduction portion 41 have the same outer diameter and inner diameter, and the only difference is the cut shape at the tip, the (oval) short of the drain introduction port 41a of this embodiment. The radius is the same as the inner diameter of the drain introduction port 101a of the first comparative example, but the (ellipse) long radius of the drain introduction port 41a of the present embodiment is longer than the inner diameter of the drain introduction port 101a of the first comparison example. Therefore, since the area of the substantially elliptical drain introduction port 41a is larger, the opening area S of the drain introduction port 41a of this embodiment is more than the opening area T of the drain introduction port 101a of the first comparative example. It will be bigger.

Next, the operation of the latent heat recovery type hot water supply device 1 having the neutralization device 27 of the present embodiment will be described.
When the operation switch 38 of the remote control 37 is turned on, the control means 36 controls the vaporizing heater 3 based on the temperature detected by the vaporizing temperature sensor 4 and also mixes the heater based on the temperature detected by the mixing chamber temperature sensor 7. 6, the vaporizer 2 and the mixing chamber 5 are preheated, the temperature at which the vaporizer 2 can vaporize the fuel, for example, the temperature of the vaporizer 2 is maintained at 220 ° C. to 250 ° C., and the temperature of the mixing chamber 5 is It will be in the standby state maintained at 125 to 130 degreeC. In this standby state, when a combustion request is generated, the burner 8 can be ignited quickly, and the power consumption during standby can be reduced by maintaining the necessary minimum temperature.

  In the standby state, when the hot water tap is opened and the flow rate sensor 33 detects a flow rate equal to or higher than the minimum operating flow rate and the control means 36 determines that a combustion request has been generated, the vaporizing heater 3 and the mixing chamber heater 6 are forced. And the electromagnetic pump 11 and the combustion fan 13 are driven to premix the vaporized gas vaporized by the vaporizer 2 and the primary air in the mixing chamber 5, and the premixed gas is burned by the burner 8. It is more ejected to start combustion.

  The combustion gas generated by the combustion of the burner 8 flows through the primary heat exchanger 21, passes through the primary heat exchanger 21, then flows through the secondary heat exchanger 23, and passes through the secondary heat exchanger 23. Thereafter, the heat is discharged from the exhaust port 24 to the outside of the latent heat recovery hot water supply device 1. Further, the water supplied from the water supply source is led from the water supply pipe 28 to the secondary heat receiving pipe 22 and circulates in order from the secondary heat receiving pipe 22 to the primary heat receiving pipe 20 where it is heated by heat exchange with the combustion gas. Then, the hot water led from the primary heat receiving pipe 20 to the hot water supply pipe 29 and adjusted to the hot water supply set temperature by adjusting the opening of the mixing valve 31 is finally supplied from the hot water tap.

  At this time, in the secondary heat exchanger 23, the water flowing through the secondary heat receiving pipe 22 and the combustion gas are subjected to heat exchange, and the drain generated by the water vapor in the combustion gas being below the dew point is the drain receiver 25. It is recovered and flows into the neutralization device 27 (container 40) via the drain pipe 26, but not only the drain but also soot is generated by the combustion. Then, drain and soot will flow into the neutralizer 27. Here, since the drain introduction part 41 of the neutralization apparatus 27 is formed in the shape where the front-end | tip was cut diagonally, and the drain introduction port 41a is formed in the substantially elliptical shape, it is the same as having demonstrated previously. The minor radius of the drain inlet 41a of the present embodiment is the same as the inner diameter of the drain inlet 101a of the first comparative example, but the (elliptical) length of the drain inlet 41a of the present embodiment. Since the radius is longer than the inner diameter of the drain introduction port 101a of the first comparative example, the opening area S of the drain introduction port 41a increases, and impurities such as soot (mainly soot) adhere to and accumulate on the inner edge of the drain introduction port 41a. Even if the deposit grows until it seems to close up, it can be easily washed away by the drain, and clogging by impurities such as soot in the drain inlet 41a can be suppressed. And the result In addition, it is possible to suppress inconveniences such as defective combustion, and further, the drain introduction part 41 is formed in a shape that is cut obliquely and the drain introduction port 41a is formed in a substantially elliptical shape. It is possible to suppress blockage of the drain introduction port 41a due to wrinkles and the like without changing the outer diameter and inner diameter of the introduction portion 41.

  And the drain which flowed in into container 40 from drain introduction part 41 is neutralized by circulating through the 1st neutralization room 44 and the 2nd neutralization room 46, and is discharged outside container 40 from drain discharge part 48, It is drained into sewage at a predetermined location.

  In addition, the neutralization apparatus 27 of this invention is not limited to one Embodiment demonstrated previously, In this embodiment, the latent heat recovery type hot water supply which produces | generates the hot water used with the hot water tap provided in the predetermined location Although the neutralization device 27 of the present invention is applied to the apparatus 1, the neutralization device 27 of the present invention generates latent heat recovery hot water that generates hot water used in a heat radiating terminal such as a floor heating panel that heats the air-conditioned space. The fuel used in the latent heat recovery type hot water supply apparatus 1 or the latent heat recovery type hot water heating apparatus may be a gas fuel such as city gas or propane gas instead of fuel such as petroleum. It may be used.

1 Latent heat recovery water heater (combustion device)
8 Burner (combustion section)
18 Heat exchanger 27 Neutralizer 40 Container 41 Drain introduction part 41a Drain introduction port

Claims (2)

  In the neutralizing device for neutralizing the drain generated by the combustion gas having a temperature below the dew point by circulating the inside of the container filled with the neutralizing agent, the container includes the drain in the container. A cylindrical drain introduction part having a drain introduction port to be introduced into the pipe, the tip of the drain introduction part is formed in an obliquely cut shape, and the drain introduction port is formed in a substantially elliptical shape. Characterized neutralizer.   A combustion apparatus having a combustion section, a heat exchanger that exchanges heat with combustion gas generated by combustion in the combustion section, and a neutralization device that neutralizes drain generated by heat exchange in the heat exchanger. A combustion apparatus using the neutralization apparatus according to claim 1 as the neutralization apparatus.

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