CN107461927A - Spraying condensation type gas fired-boiler - Google Patents

Abstract

The invention belongs to the technical field of gas boiler equipment. In order to solve the problem of poor heat exchange effect of existing boilers, the invention provides a spray type condensing gas boiler, which includes a furnace body and a furnace. The middle and lower three-layer spray boards have water inlets above the spray boards. The three-layer spray boards are arranged in parallel. There are a number of small spray holes on the spray boards. The front end of each layer of spray boards is equipped with Patching plate to maintain spray water level. The present invention adopts the upper, middle and lower three-layer structure of the spray plate device, and utilizes the small spray holes arranged in a staggered manner. When the spray water and the flue gas flow in reverse, the heat exchange effect between the water and the flue gas is increased, and the thermal efficiency is higher. , and each floor of the spray plate is equipped with a vertical water level baffle and a patch plate connected to the spray plate, which can effectively ensure a certain water level on the spray plate and is beneficial to protect the spray plate.

Description

Spray condensing gas boiler

technical field

The invention belongs to the technical field of gas boiler equipment, and in particular relates to a spray condensing gas boiler.

Background technique

Boiler is a kind of energy conversion equipment. The energy input to the boiler is in the form of chemical energy in fuel, electric energy, heat energy of high-temperature flue gas, etc. After conversion by the boiler, it outputs steam, high-temperature water or organic heat carrier with certain heat energy. .

In traditional boilers, the flue gas also has a relatively high temperature (100°-250°). The water vapor in the flue gas is still in a superheated state, and it is impossible to condense into liquid water and release latent heat of liquefaction. If the temperature of the exhaust gas of the boiler is lowered enough level, then the superheated water vapor in the flue gas will condense and release the latent heat of vaporization.

For the existing boiler as described in the patent 201310619817.2, due to its simple setting of the spray plate, the heat exchange effect between the spray water and the flue gas cannot reach the preset effect, and there is also a lack of corresponding facilities such as overflow.

Contents of the invention

In order to solve the problem of poor heat exchange effect caused by unreasonable design of existing condensing boilers, the present invention further provides a high-efficiency spray condensing gas boiler.

The present invention adopts following technical scheme:

A spray-type condensing gas-fired boiler, including a furnace body and a furnace. The furnace body is provided with a water inlet and an exhaust port. The furnace is provided with a combustion chamber. The outlet of the fire outlet of the combustion chamber is upwards. Water collection tank, the lower part of the water collection tank is provided with a water outlet, the bottom of the water collection tank is connected to the furnace sewage pipe, the bottom of the furnace is equipped with a water level visual control device, and the water level visual control device is connected to the water collection tank. The middle and lower three-layer spray boards have water inlets above the spray boards. The three-layer spray boards are arranged in parallel. There are a number of small spray holes on the spray boards. The front end of each layer of spray boards is equipped with Patching plate to maintain spray water level.

A dehydration device is provided between the uppermost spray plate and the exhaust port. The dehydration device adopts a two-stage dehydration structure, including a primary dehydration device and a secondary dehydration device. The primary dehydration device is installed on the upper spray plate and the middle spray. Between the plates, the secondary dehydration device is installed at the exhaust port.

The fire outlet is provided with a double-layer water jacket, the water jacket is connected with a water discharge pipe, the water jacket is provided with a baffle, and the baffle is connected with the patch plate on the lower spray plate, and the connection between the baffle plate and the patch plate is located in the furnace body There is a gap in the wall.

The furnace body has a structure above the lower circle, and the combustion chamber and the inner tank support at the bottom of the furnace tank are detachably connected.

The bottom of the furnace body is provided with a water seal overflow device, and a plurality of overflow pipes are externally connected to the water seal overflow device.

The present invention has following beneficial effect:

1. The present invention adopts the spray plate device with upper, middle and lower three-layer structure, and uses the small spray holes arranged in a staggered manner. When the spray water and the flue gas flow in reverse, the heat exchange effect between the water and the flue gas is increased, and the thermal efficiency is improved. higher;

2. There is a vertical water level baffle in front of each spray plate and a patch plate connected to the spray plate, which can effectively ensure a certain water level on the spray plate and help protect the spray plate;

3. A water seal overflow device is installed at the bottom of the furnace body, which can meet the normal overflow conditions of the boiler, and will not overflow and lose heat.

Description of drawings

Fig. 1 is a structural front view of the present invention;

Fig. 2 is a half-section side view of Fig. 1;

In the figure: 1-base, 2-water seal overflow device, 3-insulation layer, 4-burner interface, 5-water level gauge, 6-furnace and combustion chamber, 7-overflow pipe, 8-low temperature outlet pipe head , 9-furnace body, 10-spray plate with baffle, 11-secondary dehydration device, 12-exhaust port, 13-dehydration sewage outlet, 14-primary dehydration device, 15-spray plate, 16-smoke Air circulation outlet, 17-hanging lug, 18-return port, 19-inspection port, 20-reinforcement plate, 21-baffle plate, 22-fire outlet water jacket, 23-fire outlet, 24-inner tank water jacket drain pipe, 25 -Water outlet, 26-inner tank support, 27-water discharge pipe, 28-outrigger, 29-furnace tank, 30-furnace blowdown pipe, 31 overflow port, 32 water collection tank.

detailed description

The spray condensing gas (alcohol-based fuel) boiler shown in Figures 1 and 2 includes a furnace body 9 and a furnace 29 above the lower circle. The furnace body 9 is provided with a water inlet 18 and an exhaust port 12. The furnace 29 is provided with a combustion chamber 6, and the outlet of the combustion chamber 6 is upward. The furnace furnace 29 is a structure above the lower circle. Three-layer spray plate, with a water inlet 18 on the upper side of the spray plate, a water collecting tank 32 on the lower side of the furnace 29, a water outlet 25 on the lower part of the water collecting tank 32, and a water seal overflow device 2 on the bottom of the water collecting tank 32 , connected to the sewage pipe. A dehydration device is provided between the upper spray plate 15 and the exhaust port 12 .

The furnace furnace is a structure above the lower circle, and the fire outlet and the bottom of the furnace body are supported by movable connections. The purpose is to solve the deformation of the furnace furnace due to thermal expansion and cold constriction, thereby affecting the service life.

There is a combustion chamber inside the furnace, and a fire outlet is provided at the rear upper part of the combustion chamber. The small hole, the protective plate is connected with the baffle of the upper spray plate, the baffle is provided with a water layer, and the baffle is connected with the spray plate.

The spraying plate has three layers, including upper, middle and lower spraying plates. The upper spraying plate is arranged on the upper side of the lower spraying plate, and several small holes are respectively arranged on the upper, middle and lower spraying plates. There is a vertical water level baffle in front of each spray plate and a supplementary plate connected with the spray plate, the purpose is to ensure a certain water level on the spray plate and protect the spray plate.

A dehydration device is provided between the upper spray plate and the exhaust port, and a low-temperature water circulation device is provided at the dehydration device to facilitate water replenishment for the preheating furnace and absorb condensation waste heat. The dehydration device adopts a two-stage dehydration structure, including a primary dehydration device and a secondary dehydration device. The primary dehydration device is installed between the upper spray plate and the middle spray plate, and the secondary dehydration device is installed at the exhaust port.

The bottom of the furnace body is provided with a water level visual control device, which is connected with the water collection tank, and the water level visual control device is used to monitor the water level in the water collection tank. The bottom of the furnace body is provided with an overflow device, and the lower part of the overflow device is provided with a water seal device, thereby ensuring that heat will not be lost due to overflow.

The working principle of the present invention is as follows:

In the condensing boiler, under the action of the circulation pump, the spray water falls from the top of the furnace body in a ladder shape and passes through the small holes of the spray plate to flow in reverse with the flue gas. The flue gas is reversed from the fire outlet of the furnace, and flows upwards opposite to the water flow. The flue gas and water are in direct contact, so there is both heat exchange and mass exchange. The bottom of the furnace body is provided with a water collection box, and the water heated by the flue gas condensed from the flue gas flows to the water collection box. It is transported to the heating area under the action of the circulation pump.

The superheated water vapor in the flue gas will condense and release latent heat of vaporization. The latent heat of vaporization of condensed water can be recovered and utilized, and the thermal efficiency of the boiler is greatly improved, even reaching or exceeding 100% based on the low calorific value. Since the latent heat of vaporization of condensed water can be recycled, the thermal efficiency of the boiler reaches or exceeds 100%. It greatly reduces fuel consumption, saves energy, and saves energy by 20%.

Harmful substances in the flue gas can be conveniently removed at the same time by utilizing the water vapor in the device. Therefore, the use of condensing boilers is a thermal energy utilization system that not only improves the thermal efficiency of the boiler, but also enables the comprehensive utilization of additional products.

Structures or devices (such as dehydration devices) that are not specifically described in the present invention are all prior art.

Claims (5)

1. A spray-type condensing gas boiler, including a furnace body (9) and a furnace (29), the furnace body (9) is provided with a water inlet (18) and an exhaust port (12), and the furnace (29) A combustion chamber (6) is provided inside, the exit of the fire outlet (23) of the combustion chamber (6) is upward, a water collection box (32) is provided on the lower side of the furnace (29), and a water outlet (25) is provided at the bottom of the water collection box (32). ), the bottom of the water collection tank (32) is connected to the furnace blowdown pipe (30), the bottom of the furnace (29) is equipped with a water level visual control device (5), and the water level visual control device (5) is connected to the water collection tank (32). It is: upper, middle and lower three-layer spray plates are arranged on the inner upper side of the furnace (29), and a water inlet (18) is arranged above the spray plate, and the three-layer spray plates are arranged in parallel, and the spray plates on the spray plate A number of small spray holes are provided, and the front end of each layer of the spray plate is provided with a patch (20) for maintaining the spray water level. 2. The spray condensing gas boiler according to claim 1, characterized in that: a dehydration device is provided between the uppermost spray plate and the exhaust port (12), and the dehydration device adopts a two-stage dehydration structure, including The primary dehydration device (14) and the secondary dehydration device (11), the primary dehydration device (14) is installed between the upper spray plate and the middle spray plate, and the secondary dehydration device (11) is installed at the exhaust port (12 ) place. 3. The spray condensing gas boiler according to claim 2, characterized in that: the fire outlet (23) is provided with a double-layer water jacket, the water jacket is connected with a water discharge pipe, and the water jacket is provided with a baffle ( 21), the baffle (21) is connected to the patch (20) on the lower spray plate, and the connection between the baffle (21) and the patch (20) leaves a gap on the inner wall of the furnace. 4. The spray condensing gas boiler according to claim 3, characterized in that: the furnace body (9) is a structure above the lower circle, and the combustion chamber (6) is supported by the inner tank at the bottom of the furnace (29) ( 26) is a detachable movable connection. 5. The spray condensing gas boiler according to claim 4, characterized in that: a water seal overflow device (2) is provided at the bottom of the furnace body (9), and the water seal overflow device (2) is externally connected with Several overflow pipes (7).