CN107816891A - A kind of energy comprehensive utilization system for kiln - Google Patents

Abstract

The invention provides an integrated energy system for a kiln, which sets up a one-to-many layout of combustion chambers and kiln chambers, and arranges energy demand shifting peaks so that the combustion chambers can burn stably while meeting the heat demand of each kiln chamber , and by means of flue gas ladder utilization, flue gas heat exchange recovery, etc., the energy in the kiln firing process is recovered, stored, managed, and gradiently utilized, which significantly improves the comprehensive utilization efficiency of energy. At the same time, the flue gas surrounds the Improve the kiln chamber temperature uniformity. In addition, the controllability of the system is greatly improved, and the temperature is raised and lowered according to the temperature-time curve of different product processes to obtain products with better quality. In addition, the flue gas is separated from the combustion chamber, and whether it enters the kiln chamber is determined according to the process requirements. Greatly improved the economy and market competitiveness.

Description

A comprehensive energy utilization system for kilns

technical field

The invention relates to an energy utilization system, in particular to an energy comprehensive utilization system for kilns.

Background technique

Kilns are usually composed of four parts: kiln chamber, combustion equipment, ventilation equipment, and conveying equipment. At present, the conventional kiln is still heated by direct combustion, directly heated from normal temperature to the highest temperature, and then naturally cooled. Although such equipment is simple in structure and mature in operation, it causes a huge waste of energy. Due to the dwindling traditional energy reserves and the soaring energy prices, the situation of energy conservation in the ceramic industry is relatively severe. It is urgent to find a way to reduce energy consumption and improve utilization efficiency.

To sum up, at present, there is no method with simple structure, high energy utilization rate, and strong controllability to manage and apply the energy of the kiln.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide an integrated energy system for kilns with simple structure, high energy utilization rate and strong controllability.

The invention provides a comprehensive energy utilization system for kilns, including:

A combustion chamber for providing heat;

At least 3 kiln chambers distributed around the combustion chamber, and flue gas heating pipes are respectively arranged inside the kiln chambers;

Furnace doors are respectively arranged between the combustion chamber and each kiln chamber, and the flue gas heating pipes in the combustion chamber and each kiln chamber are respectively connected through flue gas pipes, and the smoke in the combustion chamber and each kiln chamber is Fans are installed on the flue gas pipes between the gas heating pipes;

The flue gas heating pipes inside each kiln chamber are sequentially connected through flue gas pipes.

In the present invention, a combustion chamber is arranged, which is connected to multiple kiln chambers through a furnace door, and the heat consumption temperature of several kiln chambers is staggered in time. When one kiln chamber is in the highest temperature heating state, the other kiln chambers are in the second high temperature state respectively. 1. In the preheating state, open the door of the kiln chamber in the highest temperature heating state, and the combustion chamber will directly heat the kiln chamber through heat radiation, and the high temperature flue gas from the combustion chamber will be introduced into the kiln chamber in the second high temperature state and the preheating state successively. , such a cycle makes the combustion chamber and the kiln chamber run in parallel in a one-to-many situation, realizing the step-by-step utilization of energy. For example, three kiln chambers A, B, and C are set up around the combustion chamber. When the kiln chamber A is in the highest temperature heating state, the furnace door between the combustion chamber and the kiln chamber is opened, and the kiln chamber A is heated by direct radiation, and at the same time the combustion chamber generates The flue gas enters the flue gas heating pipe surrounding the kiln chamber A to make the temperature in the kiln chamber uniform; then the flue gas is drawn out from the kiln chamber A and enters the flue gas heating pipe surrounding the kiln chamber B to heat the kiln chamber B to the second highest temperature state, the flue gas heated by kiln chamber B is then preheated for kiln chamber C. When the kiln chamber in B needs to be heated to the highest temperature, open the furnace door connecting the combustion chamber and kiln chamber B, and introduce the flue gas into the flue gas heating pipe surrounding kiln chamber B, and the flue gas from kiln chamber B Just to heat the kiln chamber C to reach the second high temperature, while the kiln chamber A is in the cooling stage, and so on, each kiln chamber successively staggers the heating stage. The combustion chamber has been working stably, directly heating the kiln chambers in the highest temperature stage one by one, while the kiln chambers in other temperature stages are heated in different steps with flue gas, so as to complete the step-by-step utilization of combustion heat energy and improve the efficiency of the entire system. energy efficiency.

Further, each of the kiln chambers is respectively provided with heat exchange pipes, and each of the kiln chambers is also connected to a waste water energy storage device, and the waste water energy storage device is connected through a water pipe and a heat exchange pipe.

Further, the waste water energy storage device includes a smoke-water heat exchange device, a high-temperature water storage tank, and a low-temperature water storage tank.

Each kiln chamber is surrounded by heat exchange pipes and equipped with two water storage tanks, one with high temperature and one with low temperature, to meet the needs of preheating and cooling of the kiln chamber, and further improve the effect of the stepwise utilization of energy in the present invention. When the kiln chamber reaches the highest temperature and needs to be cooled, water is diverted from the low-temperature water storage tank into the heat exchange pipes surrounding the kiln chamber, so that the temperature of the kiln chamber is lowered according to the expected temperature drop-time curve. After the cooling water is heated, it enters the high-temperature water storage tank, so as to recover the heat energy of the kiln chamber. The heat recovered from the hot water in the high temperature storage tank can be used to preheat the kiln chamber.

Further, the flue gas heating pipes and heat exchange pipes form an arrangement or surrounding structure in the kiln chamber.

Further, the flue gas heating pipes are arranged on the bottom and both sides of the kiln chamber, and the heat exchange pipes are arranged on both sides and the upper part of the kiln chamber.

Further, the heat exchange pipes arranged on both sides and the flue gas heating pipes are arranged alternately and sequentially.

In order to make the temperature in the kiln chamber uniform, the flue gas heating pipes are evenly arranged on the bottom and both sides of the kiln chamber. On both sides and the upper part of the chamber, the water exchange pipes and flue gas heating pipes arranged on both sides can be arranged alternately and sequentially.

Further, the kiln chamber is equipped with a hydraulically driven rotary table, and the ceramic products on the rotary table are driven to rotate by water flow.

The water flow drives the ceramic products on the rotary table to rotate slowly, which increases the uniformity of the overall heating of the product during the radiation heat exchange, and can be used for the production of key refined products.

Further, the flue gas heating pipe is provided with openings to lead the flue gas into the kiln chamber.

The flue gas heating pipe is provided with openings. For products with special process requirements, such as some ceramics that require flue gas in the firing process, the flue gas can be directly introduced into the kiln chamber, which is also used as one of the adjustable means to achieve the traditional The effect of craftsmanship.

Compared with the prior art, the present invention has the following advantages and effects:

1. The energy in the kiln firing process is recovered, stored, managed, and gradiently utilized, which significantly improves the comprehensive utilization efficiency of energy;

2. The controllability of the system is greatly improved, and the heating and cooling are carried out according to the temperature-time curve of different product processes, which is conducive to obtaining better quality products;

3. The temperature uniformity of the kiln chamber is greatly improved, and the yield of finished products is greatly improved;

4. Separate the flue gas from the combustion chamber, and decide whether to enter the kiln chamber according to the process requirements.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Label description:

1-combustion chamber 2-furnace door 3-fan 4-kiln chamber 5-waste water energy storage device

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

Embodiment 1: As shown in Figure 1, this embodiment comprises combustion chamber 1, at least 3 kiln chambers 4, is provided with furnace door 2 between combustion chamber 1 and each kiln chamber 4, and combustion chamber 1 can be opened when furnace door 2 is opened. Carry out thermal radiation heating to a kiln chamber 4, each kiln chamber 4 is equipped with a flue gas heating pipe, the combustion chamber 1 is connected to the flue gas heating pipe in each kiln chamber 4 through the flue gas pipe, and the flue gas pipe is Both are equipped with fans 3 for controlling the flow of high-temperature flue gas from the combustion chamber 1 to different kiln chambers 4 . The kiln chambers 4 are also connected by flue gas pipes. The number of kiln chambers 4 can be multiple but not limited to three.

Embodiment 2: As shown in Figure 1, on the basis of Embodiment 1, in this embodiment, each kiln chamber 4 is also equipped with a heat exchange pipe, and each kiln chamber 4 is also connected to a waste water energy storage through a water pipe. The device 5, the residual hot water energy storage device 5 specifically includes a smoke-water heat exchange device, a high-temperature water storage tank, and a low-temperature water storage tank.

Embodiment 3: In this embodiment, the flue gas heating pipes and water exchange pipes form an arrangement or a surrounding structure in the kiln chamber; the flue gas heating pipes can also be evenly arranged on the bottom and both sides of the kiln chamber, and no pipes are arranged above. Just do a good job of heat preservation; the water exchange pipes also have the functions of preheating and cooling, and can be arranged on both sides and the upper part of the kiln chamber, and the water pipes and flue gas pipes arranged on both sides can be arranged alternately and sequentially.

In other embodiments, a hydraulically driven rotary table can also be set in the kiln chamber, and the ceramic products on the rotary table are driven to rotate slowly by water flow. The flue gas heating pipe in the kiln chamber can also be provided with openings so that the flue gas can be directly introduced into the kiln chamber when necessary.

In addition, it should be noted that the specific embodiments described in this specification may be different in terms of parts, shapes and names of components. All equivalent or simple changes made according to the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the present invention or exceed the scope defined in the claims. All should belong to the protection scope of the present invention.

Claims (8)

1. A comprehensive energy utilization system for a kiln, characterized in that it comprises: A combustion chamber for providing heat; At least 3 kiln chambers distributed around the combustion chamber, and flue gas heating pipes are respectively arranged inside the kiln chambers; Furnace doors are respectively arranged between the combustion chamber and each kiln chamber, and the flue gas heating pipes in the combustion chamber and each kiln chamber are respectively connected through flue gas pipes, and the smoke in the combustion chamber and each kiln chamber is Fans are installed on the flue gas pipes between the gas heating pipes; The flue gas heating pipes inside each kiln chamber are sequentially connected through flue gas pipes. 2. The energy comprehensive utilization system for kilns according to claim 1, characterized in that, each of the kiln chambers is respectively provided with heat exchange pipes, and each of the kiln chambers is also respectively connected to a waste water energy storage device, and the waste water energy storage device is connected through a water pipe and a heat exchange pipe. 3. The energy comprehensive utilization system for kilns according to claim 2, characterized in that the waste water energy storage device includes a smoke-water heat exchange device, a high-temperature water storage tank, and a low-temperature water storage tank. 4. The energy comprehensive utilization system for kilns according to claim 3, characterized in that, the flue gas heating pipes and water exchange pipes form an arrangement or a surrounding structure in the kiln chamber. 5. The energy comprehensive utilization system for kilns according to claim 4, characterized in that, the flue gas heating pipes are arranged below and on both sides of the kiln chamber, and the heat exchange pipes are arranged in the kiln chamber sides and top. 6 . The comprehensive energy utilization system for kilns according to claim 5 , wherein the water exchange pipes arranged on both sides and the flue gas heating pipes are arranged alternately and sequentially. 7. The energy comprehensive utilization system for a kiln according to any one of claims 1-6, characterized in that the kiln chamber is provided with a hydraulically driven rotary table, and the ceramics on the rotary table are driven to rotate by water flow. 8. The energy comprehensive utilization system for a kiln according to any one of claims 1-6, characterized in that the flue gas heating pipe is provided with an opening to lead the flue gas into the kiln chamber.